Hydrogen transfer pressurization and dehumidification device for hydrogen refueling station and use method

Abstract

The application relates to a hydrogen transfer pressurization and dehumidification device for a hydrogen refueling station and a use method. The device comprises a first storage tank, a second storage tank, a third storage tank, a liquid delivery pressurizer, a displacement liquid storage tank, a liquid delivery pipeline connector, a gas delivery pipeline connector, a decontaminator, a precooling dehumidifier and displacement liquid, and can be applied to the hydrogen refueling station. Hydrogen transported to the hydrogen refueling station is displaced from a transport tank body to a hydrogen storage tank on the station by the displacement liquid through the liquid delivery pressurizer, and is pressurized and stored, precooling and dehumidification are completed in the precooling dehumidifier, and finally, the hydrogen is filled into a high-pressure gas cylinder of a user. The application also comprises multiple hydrogen transfer pressurization methods. Compared with the existing hydrogen refueling station, the application eliminates the use of a hydrogen compressor, shortens hydrogen unloading time, improves hydrogen unloading rate, improves hydrogen refueling station operation efficiency, reduces equipment cost and operation cost, and is favorable for hydrogen refueling station scale use.

Description

Technical Field

[0001] The present invention relates to a hydrogen transfer pressurizing and dehumidifying device and a use method thereof, and in particular to a hydrogen transfer pressurizing and dehumidifying device for a hydrogen refueling station and a use method thereof. Background Art

[0002] At a hydrogen refueling station, the general process for handling hydrogen is to first unload the high-pressure hydrogen cylinders from the bundle truck transporting it to the station, transfer the hydrogen to the high-pressure hydrogen storage container on the station, and simultaneously pressurize it through a hydrogen compressor. The hydrogen in the high-pressure hydrogen storage container is then pre-cooled and then filled into the high-pressure gas cylinder of the fuel cell vehicle through a hydrogen refueling machine. The specific operating procedures of various hydrogen refueling stations vary, but the main processes and equipment are basically the same. The current problems with hydrogen refueling stations at home and abroad are:

[0003] 1) Hydrogen transfer requires a hydrogen compressor. The transfer from high pressure to low pressure can be automated through hydrogen pressure differentials. However, when the pressure differential is small, the hydrogen flow rate decreases, resulting in a prolonged transfer time. In this case, a hydrogen compressor must be used to complete the hydrogen transfer. The pressure of the high-pressure hydrogen tanks in the tube bundle truck is generally lower than that of the high-pressure hydrogen storage containers on the station. A hydrogen compressor is required to increase the pressure when the truck is unloading hydrogen. After the hydrogen storage container has partially transferred hydrogen through the pressure differential method, the pressure decreases, necessitating a hydrogen compressor to increase the pressure. Alternatively, a hydrogen compressor can be used to fill and pressurize the customer's high-pressure cylinders. However, hydrogen compressors present issues such as high equipment procurement costs and high operating costs.

[0004] 2) Currently, when a tube bundle truck unloads hydrogen, the connecting pipelines must be repeatedly purged with hydrogen when the pipelines are connected in order to remove the air therein. This not only wastes hydrogen but also requires the installation of emission facilities for safety.

[0005] 3) When the tube bundle truck unloads hydrogen, a considerable amount of hydrogen always remains in the container and cannot be unloaded, which reduces the efficiency of hydrogen transportation.

[0006] 4) The time it takes to unload hydrogen from the tube bundle truck is too long, which reduces the efficiency of hydrogen transportation.

[0007] 5) The current hydrogen production process causes water to be contained in the hydrogen, and the hydrogen standards for fuel cell vehicles have stringent requirements on the water content of hydrogen. It is necessary to configure high-efficiency and energy-saving hydrogen online dehumidification equipment.

[0008] Through industry surveys, online inquiries and extensive retrieval of patent information, it was found that the current patents related to hydrogen boosting technology and hydrogen transfer technology for hydrogen refueling stations are inseparable from hydrogen compressors, and the connecting pipelines must be repeatedly purged with hydrogen when connecting them. Therefore, hydrogen refueling stations at home and abroad have not solved these problems, resulting in high investment, construction and operation costs for hydrogen refueling stations, which is not conducive to the promotion and application of hydrogen energy. Summary of the Invention

[0009] The purpose of the present invention is to solve the problems of high energy consumption and high equipment costs caused by the use of hydrogen compressors in current hydrogen refueling stations, the long unloading time of hydrogen tube bundle transport vehicles, the large amount of residual hydrogen after unloading, and the hydrogen waste and safety hazards caused by multiple purging when connecting pipelines. This will enable hydrogen refueling stations to reduce equipment and operating costs and improve the operating efficiency of hydrogen tube bundle transport vehicles.

[0010] In order to solve the above problems, the present invention adopts the following technical solutions:

[0011] A hydrogen transfer, boosting and dehumidifying device for a hydrogen refueling station includes a first storage tank 1, a second storage tank 2, a displacement liquid storage tank 9, a liquid delivery booster 5, an infusion valve 31, an infusion valve 32, an infusion valve 33, an infusion valve 34, an infusion valve 35, an infusion valve 36, an infusion valve 37, an infusion valve 38, and an infusion valve 39; the two ports of the liquid delivery booster 5 and each infusion valve are respectively R port and L port; the liquid delivery booster 5 has the functions of forward and reverse delivery, boosting and flow regulation of the liquid, and the pressure difference between the outlet and the inlet is the boosted pressure;

[0012] The hydrogen transfer, pressurizing and dehumidifying device for a hydrogen refueling station includes a liquid delivery pipeline connector 7 and a gas delivery pipeline connector 8, the two ports of which are R port and L port respectively; the hydrogen transfer, pressurizing and dehumidifying device for a hydrogen refueling station is also provided with a dehumidifier 6;

[0013] The first storage tank 1, the second storage tank 2 and the displacement fluid storage tank 9 are all pressure vessels, the middle section of which is cylindrical and the two ends are provided with curved heads. The working pressure of the first storage tank 1 and the second storage tank 2 is 0.01MPa to 500MPa, and the working pressure of the displacement fluid storage tank 9 is 0.01MPa to 20MPa;

[0014] The axis of the first storage tank 1 includes an angle δ with the horizontal plane, and the angle δ ranges from 0° to 90°. The two ends of the first storage tank 1 are end B and end C, respectively. When δ is greater than 0°, end B is higher than end C. End B of the first storage tank 1 is provided with a hydrogen pipeline connecting the inside of the tank with the outside of the tank, and is also provided with a first pressure detector 11 and a hydrogen control valve 12. End C of the first storage tank 1 is provided with a liquid pipeline connecting the inside of the tank with the outside of the tank, and the liquid pipeline is provided with a first valve 13 on the outside of the tank. The first storage tank 1 stores hydrogen to be transferred out.

[0015] The angle between the axis of the second tank 2 and the horizontal plane is β, and β ranges from 0° to 90°, and the two ends of the angle are D end and E end respectively, when β is greater than 0°, D end is higher than E end; the D end of the second tank 2 is provided with a hydrogen pipeline which is communicated between the inside and outside of the tank, and is provided with a second pressure detector 21, a hydrogen control valve 22 and an outlet valve 26; the E end of the second tank 2 is provided with a liquid pipeline which is communicated between the inside and outside of the tank, and the outside section of the liquid pipeline is provided with a second valve 23; the other end of the second valve 23 is connected with the R port of the liquid delivery valve 33 and the L port of the liquid delivery valve 39; the second tank 2 is provided with a displacement liquid 4, and the displacement liquid 4 is a kind of liquid; hydrogen is stored above the liquid level of the displacement liquid 4, and the volume of the displacement liquid 4 accounts for 0% to 99% of the content volume of the second tank 2; the hydrogen pressure in the first tank 1 and the second tank 2 is always greater than 0.01 MPa;

[0016] The displacement liquid tank 9 is a tank for storing displacement liquid 4, and the space above the liquid level of the displacement liquid 4 is provided with hydrogen; the top of the displacement liquid tank 9 is provided with a liquid tank exhaust valve 91 and a liquid tank inlet valve 92, the bottom outer wall of the displacement liquid tank 9 is provided with a liquid tank liquid level detector 93, and the bottom is also provided with a liquid delivery pipeline which is connected with the R port of the liquid delivery valve 35 and the L port of the liquid delivery valve 36; the hydrogen pressure in the displacement liquid tank 9 is always greater than 0.01 MPa;

[0017] The L port of the liquid delivery pipeline connector 7 is connected with the first valve 13, and the other end R port is connected with the L port of the liquid delivery valve 31, the R port of the liquid delivery valve 31 is connected with the L port of the liquid delivery booster 5 and the L port of the liquid delivery valve 32, the R port of the liquid delivery valve 32 is connected with the L port of the liquid delivery valve 35 and the R port of the liquid delivery valve 34, and the R port of the liquid delivery valve 39 is connected with the L port of the liquid delivery valve 34;

[0018] The liquid delivery pipeline connector 7 comprises a liquid delivery tube connecting joint 72, a liquid delivery control valve 75, a liquid delivery tube exhaust control valve 73, a liquid delivery tube liquid level meter 74 and a pipeline; the L port of the liquid delivery pipeline connector 7 is internally connected with the liquid delivery tube connecting joint 72, and the R port of the liquid delivery pipeline connector 7 is internally connected with the liquid delivery control valve 75; the other end of the liquid delivery tube connecting joint 72 is connected with a liquid delivery inclined pipe 76, and the other end of the liquid delivery inclined pipe 76 is connected with two components, one is upwardly connected with the liquid delivery tube exhaust control valve 73, and the other is connected with the liquid delivery control valve 75 at an angle of β5 with the horizontal plane, and β5 ranges from 1° to 70°; the axis of the liquid delivery inclined pipe 76, the liquid delivery tube connecting joint 72 and the pipeline connected with the first valve 13 has an angle β1 with the horizontal plane, and β1 ranges from 20° to 90°, and the position of the liquid delivery tube connecting joint 72 is higher than the first valve 13; the other end of the liquid delivery tube exhaust control valve 73 is provided with a liquid delivery tube liquid level meter 74 and a pipeline which is communicated with the atmosphere;

[0019] The gas pipeline connector 8 includes a gas pipeline connection joint 82, a gas pipeline exhaust control valve 83, a gas pipeline control valve 85, a gas pipeline liquid infusion control valve 88, a gas pipeline liquid level gauge 84 and pipelines; the L port of the gas pipeline connector 8 is connected to the hydrogen control valve 12, and the other end R port is connected to the hydrogen control valve 22;

[0020] The L-port end of the gas pipeline connector 8 is internally connected to the gas pipeline connecting joint 82, and the R-port of the other end of the gas pipeline connector 8 is internally connected to the gas control valve 85; the other end of the gas pipeline connecting joint 82 is connected to the gas inclined pipe 86 and the gas pipeline infusion control valve 88; the other end of the gas inclined pipe 86 is connected to two components, one is connected to the gas pipeline exhaust control valve 83 upward, and the other is connected to the gas control valve 85 obliquely downward at an angle of β6 with the horizontal plane, and the range of β6 is 1° to 70°; The angle between the axis of the inclined tube 86, the gas pipe connecting joint 82, and the pipeline connected to the gas pipe connecting joint 82 and the hydrogen control valve 12 and the horizontal plane is β2, and the range of β2 is 20° to 90°, and the position of the gas pipe connecting joint 82 is higher than the hydrogen control valve 12; the other end of the gas pipe exhaust control valve 83 is provided with a gas pipe level gauge 84 and a pipeline connected to the atmosphere; the other end of the gas pipe liquid infusion control valve 88 is connected to the pipeline with a replacement fluid 4, and its pressure is 0.001MPa to 0.2MPa.

[0021] Furthermore, the hydrogen transfer, pressurizing and dehumidifying device for the hydrogen refueling station includes a third storage tank 20; the third storage tank 20 is a pressure vessel, the middle section of which is cylindrical, and both ends are provided with curved heads, and the working pressure is 0.01MPa to 500MPa:

[0022] The angle between the axis of the third storage tank 20 and the horizontal plane is β4, and the range of β4 is 0° to 90°. Its two ends are respectively D3 and E3. When β4 is greater than 0°, the D3 end is higher than the E3 end; the D3 end of the third storage tank 20 is provided with a hydrogen pipeline communicating between the inside and the outside of the tank, and is provided with a third pressure detector 201, a hydrogen control valve 202 and an outlet valve 206; the E3 end of the third storage tank 20 is provided with a liquid pipeline communicating between the inside and the outside of the tank, and the liquid pipeline is provided with a third valve 203 on the outside of the tank; the other end of the third valve 203 is connected to the R port of the infusion valve 39 and the L port of the infusion valve 34; the third storage tank 20 is provided with a replacement fluid 4, and hydrogen is stored above the liquid surface of the replacement fluid 4. The volume of the replacement fluid 4 accounts for 0% to 99% of the internal volume of the third storage tank 20; the hydrogen pressure in the third storage tank 20 is always greater than 0.01MPa;

[0023] The hydrogen control valve 202 of the third tank 20 and the hydrogen control valve 22 of the second tank 2 are connected with the R port of the gas pipeline connector 8 and the L port of the gas outlet valve 27; the gas outlet valve 206 of the third tank 20 and the gas outlet valve 26 of the second tank 2 are connected with the R port of the gas outlet valve 27.

[0024] Further, the outlet positions of the hydrogen pipelines in the tanks at the B end of the first tank 1, the D end of the second tank 2 and the D3 end of the third tank 20 are arranged at the highest positions of the ends; the outlet positions of the liquid pipelines in the tanks at the C end of the first tank 1, the E end of the second tank 2 and the E3 end of the third tank 20 are arranged at the lowest positions of the ends.

[0025] Further, the first tank 1, the second tank 2 and the third tank 20 are respectively provided with exhaust cavities 18a, 18b and 18c, which are respectively arranged at the highest positions of the B end, the D end and the D3 end, and are all rotary bodies; the hydrogen pipeline outlets of the B end, the D end and the D3 end are respectively arranged at the highest positions of the exhaust cavities 18a, 18b and 18c; the first tank 1, the second tank 2 and the third tank 20 are respectively provided with liquid discharge cavities 19a, 19b and 19c, which are respectively arranged at the lowest positions of the C end, the E end and the E3 end, and are all rotary bodies; the liquid pipeline outlets of the C end, the E end and the E3 end are respectively arranged at the lowest positions of the liquid discharge cavities 19a, 19b and 19c.

[0026] Further, the working pressure of the impurity remover 6 is 0.005 MPa to 0.5 MPa, the middle section is in the shape of a cylinder, and the two ends are provided with curved heads; the top of the impurity remover 6 is provided with an impurity remover exhaust valve B67 and an impurity remover inlet control valve 66, the other end of the impurity remover exhaust valve B67 is connected with an impurity remover exhaust vacuum pump 68; the top of the impurity remover 6 is provided with an impurity remover exhaust valve A60 at the highest position; the impurity remover inlet control valve 66 is connected with a hydrogen pipeline, and the pressure is 0.001 MPa to 0.03 MPa;

[0027] The bottom of the impurity remover 6 is provided with a discharge pipeline and a connected impurity remover liquid control valve 62, an inlet pipeline and a connected impurity remover liquid inlet control valve 63; the impurity remover liquid inlet control valve 63 is connected to the replacement fluid pipeline to be removed, and the pressure of the replacement fluid to be removed in the pipeline is 0.05MPa to 0.5MPa; the other end of the impurity remover liquid outlet control valve 62 is connected to the inlet of the impurity remover liquid outlet pump 61 and the R port of the infusion valve 38, and the suction lift of the impurity remover liquid outlet pump 61 is greater than 5m; the outlet of the impurity remover liquid outlet pump 61 is connected to the R port of the infusion valve 36 and the R port of the infusion valve 37; a impurity remover liquid level detector 69 is provided on the outer wall of the bottom of the impurity remover 6;

[0028] A de-impurifier liquid spray control valve 64 is provided on the upper part of the de-impurifier 6, and a de-impurifier liquid inlet nozzle 65 is provided on the upper part of the interior of the de-impurifier 6, and the two are connected by a pipeline passing through the tank wall of the de-impurifier 6; the de-impurifier liquid spray control valve 64 is connected to the replacement fluid pipeline to be de-impurized, and the replacement fluid to be de-impurized has a pressure of 0.05MPa to 1MPa and a temperature of 5°C to 98°C; the de-impurifier liquid inlet nozzle 65 sprays the replacement fluid to be de-impurized into atomized form in the de-impurifier 6; the de-impurifier 6 can eliminate gaseous impurities dissolved in the replacement fluid 4.

[0029] Furthermore, the replacement fluid 4 is water.

[0030] Furthermore, the hydrogen transfer, boosting and dehumidification device for the hydrogen refueling station is provided with a precooling dehumidifier 10, which is composed of a precooling primary dehumidifier and a secondary dehumidifier; the precooling primary dehumidifier precools and dehumidifies the hydrogen, and the secondary dehumidifier further separates the moisture in the hydrogen;

[0031] The pre-cooling primary dehumidifier is composed of a pre-cooling pressure vessel 101 and other components; a first heat exchanger 1011 is provided in the pre-cooling pressure vessel 101, and its surface temperature is -80°C to -5°C; the pre-cooling pressure vessel 101 is also provided with a hydrogen inlet pipeline and a pre-cooler air inlet valve 1030 connected to the pipeline, and the hydrogen inlet pipeline junction is located below the first heat exchanger 1011; an insulation layer 1012 is provided on the outer surface of the pre-cooling pressure vessel 101 to keep the air cool; a pre-cooler temperature detector 1031 is provided on the top of the pre-cooling pressure vessel 101; an anti-ice and snow coating is provided on the surface of the first heat exchanger 1011 and the inner surface of the pre-cooling pressure vessel 101;

[0032] A drain pipe is provided at the bottom of the precooling pressure vessel 101, and a precooler upper liquid level gauge 1018 is provided on the drain pipe. A precooler drain valve 1019 is provided on the drain pipe below the precooler upper liquid level gauge 1018. A precooler drain tank 1013 is connected below the precooler drain valve 1019. The precooler drain tank 1013 is a pressure vessel, and a pressure detector 1032 and a drain tank air inlet valve 1014 are provided on the top of the precooler drain tank 1013. The drain tank air inlet valve 1014 is connected to the drain tank 1013. The connected pipeline contains hydrogen with a pressure of 0.01MPa to 5MPa; a precooler middle liquid level gauge 1017 and a precooler lower liquid level gauge 1016 are provided on the middle outer wall and lower outer wall of the precooler drainage tank 1013; a precooler drain valve 1015 is provided at the bottom of the precooler drainage tank 1013, and the precooler drain valve 1015 is connected to a U-shaped drainage pipeline with an outlet facing upward. A drainage buffer 1034 is provided at the outlet to prevent the impact of high-pressure drainage on the outside;

[0033] The secondary dehumidifier is composed of a dehumidification pressure vessel 102 and other components. The top of the dehumidification pressure vessel 102 is a hemispherical body. A hydrogen outlet pipeline and a hydrogen supply valve 1033 connected to the hemispherical body are arranged at the top. A cylinder is arranged below the hemispherical body, and the bottom is a curved head. A hydrogen transmission pipe 1037 is arranged at the top of the pre-cooling pressure vessel 101. The hydrogen transmission pipe 1037 is connected to the dehumidification pressure vessel 102. The connection point between the hydrogen transmission pipe 1037 and the dehumidification pressure vessel 102 is located at the connection part of the spherical body and the cylinder. The direction of the pipeline at the connection point is horizontal and downward, and the angle β3 with the horizontal plane is in the range of 0° to 45°. The direction of the pipeline at the connection point is tangent to the inner surface of the cylinder of the dehumidification pressure vessel 102. The hydrogen transmission pipe 1037 and the inner surface of the dehumidification pressure vessel 102 are coated with anti-ice and snow paint.

[0034] A drainage pipe is provided at the bottom of the dehumidification pressure vessel 102, and a dehumidification upper liquid level gauge 1028 is provided on the drainage pipe. A dehumidification drainage valve 1029 is provided below the dehumidification upper liquid level gauge 1028, and a dehumidification drainage tank 1023 is connected and provided below the dehumidification drainage valve 1029; the dehumidification drainage tank 1023 is a pressure vessel, and a pressure detector 1036 and a dehumidification drainage tank air inlet valve 1024 are provided on the top thereof; the pipeline connected to the dehumidification drainage tank air inlet valve 1024 is a hydrogen pipeline, and the pressure is 0.01MPa To 5MPa; a dehumidification middle liquid level gauge 1027 and a dehumidification lower liquid level gauge 1026 are provided on the middle outer wall and the lower outer wall of the dehumidification drainage tank 1023; a dehumidification drainage outlet valve 1025 is provided at the bottom of the dehumidification drainage tank 1023, and the drainage pipeline connected to the dehumidification drainage outlet valve 1025 is provided as a U-shaped drainage pipeline, with the outlet facing upward, and a dehumidification drainage buffer 1035 is provided at the outlet to prevent the impact of high-pressure drainage on the outside; a cold-keeping secondary dehumidifier insulation layer 1022 is provided on the upper outer surface of the dehumidification pressure vessel 102.

[0035] The R port of the gas outlet valve 27 is connected to the precooler gas inlet valve 1030; the hydrogen supply valve 1033 is connected to the user-end gas cylinder through a pipeline and a hydrogenation machine;

[0036] The outer surfaces of the second storage tank 2, third storage tank 20, displacement fluid storage tank 9, and infusion pipeline are all provided with an insulation layer to prevent freezing and crystallization of the displacement fluid 4 during winter use. The outer surfaces of the hydrogen delivery pipe 1037 and the hydrogen delivery pipeline downstream of the dehumidification pressure vessel 102 are also provided with an insulation layer to prevent excessive heating of the pre-cooled hydrogen.

[0037] Furthermore, a second heat exchanger 1021 is provided in the pre-cooling pressure vessel 101. The second heat exchanger 1021 is arranged in the space above the hydrogen inlet pipe intersection and below the first heat exchanger 1011, and its surface temperature is 0.1°C to 5°C; the surface of the second heat exchanger 1021 is provided with an anti-ice and snow paint coating.

[0038] Furthermore, the replacement fluid 4 is an ionic liquid.

[0039] Furthermore, the replacement fluid 4 is an antifreeze solution.

[0040] The present invention also provides a method for using the hydrogen transfer, pressurization and dehumidification device for a hydrogen refueling station, using the hydrogen transfer, pressurization and dehumidification device for a hydrogen refueling station as described above.

[0041] A. The impurity removal steps of the impurity remover 6 are:

[0042] The first step is to remove the air in the impurity remover 6:

[0043] Open the impurity remover exhaust valve A60 and close other valves;

[0044] Open the impurity remover liquid inlet control valve 63, and the replacement fluid to be removed flows into the impurity remover 6; as the liquid level rises, the air in the impurity remover 6 is discharged from the impurity remover exhaust valve A60; when the impurity remover exhaust valve A60 discharges the replacement fluid to be removed, the impurity remover 6 is completely filled with the replacement fluid to be removed, and the air has been exhausted, and the impurity remover liquid inlet control valve 63 and the impurity remover exhaust valve A60 are closed;

[0045] The second step is to form a hydrogen cavity and negative pressure:

[0046] Open the infusion valve 38, the impurity remover outlet control valve 62, and the impurity remover air inlet control valve 66, and close the remaining valves; discharge the replacement fluid to be removed and simultaneously introduce hydrogen; when the liquid level drops by 5% to 50%, first close the impurity remover air inlet control valve 66; then close the infusion valve 38, open the infusion valve 37, and start the impurity remover outlet pump 61 to pump out the liquid; and make the hydrogen pressure in the impurity remover 6 less than one atmosphere;

[0047] The third step is to remove impurities:

[0048] When the liquid level drops by 70% to 99%, the impurity remover spray control valve 64 is opened, and the replacement fluid to be removed is sprayed into the impurity remover 6 through the impurity remover liquid inlet nozzle 65 and atomized, and the pressure in the impurity remover 6 is controlled to an absolute pressure of 0.005 MPa to 0.15 MPa; the gases other than hydrogen dissolved in the replacement fluid to be removed are fully separated; the infusion valve 37 is closed and the infusion valve 36 is opened, and the replacement fluid 4 after impurity removal is transferred to the replacement fluid storage tank 9;

[0049] The fourth step is to reduce the concentration of hydrogen impurities:

[0050] When it is necessary to remove the hydrogen contained in the impurity gas in the impurity remover 6, open the impurity remover exhaust valve B67 and start the impurity remover exhaust vacuum pump 68 to discharge the hydrogen with high impurity concentration. At the same time, open the impurity remover air intake control valve 66 to introduce pure hydrogen; delay the shutdown of the impurity remover exhaust valve B67, the impurity remover exhaust vacuum pump 68, and the impurity remover air intake control valve 66 to continue the impurity removal operation.

[0051] B. The pre-cooling and dehumidifying process of the pre-cooling dehumidifier 10 is as follows:

[0052] Hydrogen enters the precooling pressure vessel 101 through the precooler air inlet valve 1030, flows upward from the hydrogen transfer pipe 1037 set at the top to the dehumidification pressure vessel 102; when the temperature of the hydrogen before entering the pressure vessel 101 is lower than or equal to 5°C, the second heat exchanger 1021 stops working; when the temperature of the hydrogen before entering the pressure vessel 101 is higher than 5°C, the second heat exchanger 1021 starts working; because the surface temperature of the second heat exchanger 1021 is 0.1°C to 5°C, the hydrogen cools down, and part of the water vapor condenses into water droplets and falls to the bottom of the precooling pressure vessel 101; the surface temperature of the first heat exchanger 1011 is set to -80°C to -5°C, the hydrogen rises into this area and touches the surface of the first heat exchanger 1011, the hydrogen cools down to below 0°C, and the water vapor in the hydrogen crystallizes into ice crystals. Due to the action of gravity, part of the ice crystals The ice crystals fall to the bottom of the pre-cooling pressure vessel 101 and melt; hydrogen flows out from the hydrogen transmission pipe 1037 at the top of the pre-cooling pressure vessel 101 and enters the dehumidification pressure vessel 102 along the tangent and obliquely downward, forming a composite motion of circular motion and downward motion along the inner surface of the cylinder of the dehumidification pressure vessel 102. Since the ice crystals are denser than hydrogen, they are concentrated near the container wall under the action of inertia, while there are very few ice crystals near the container axis. Finally, the ice crystals fall to the bottom of the dehumidification pressure vessel 102 and melt; since the inner surfaces of the dehumidification pressure vessel 102, the pre-cooling pressure vessel 101, the hydrogen transmission pipe 1037 and the surfaces of the internal components are coated with anti-ice and snow paint, ice crystals will not adhere to their surfaces; the hydrogen after pre-cooling and dehumidification is input into the user-end gas cylinder from the top pipeline of the dehumidification pressure vessel 102 through the hydrogen supply valve 1033 and the hydrogen filling machine.

[0053] C. The drainage method of the pre-cooling dehumidifier 10 is:

[0054] The drainage method of the pre-cooling dehumidifier during the pre-cooling dehumidification process is:

[0055] When the precooler upper liquid level gauge 1018 detects water, the precooler drain valve 1019 is opened to drain the water into the precooler drain tank 1013; the precooler drain tank 1013 maintains a pressure of 0.01 MPa to 10 MPa, and the precooler middle liquid level gauge 1017 and the precooler lower liquid level gauge 1016 detect the water level, and control the switch of the precooler drain valve 1015 to discharge the water along the U-shaped drain pipe, so that the water level is maintained between the precooler middle liquid level gauge 1017 and the precooler lower liquid level gauge 1016, and the water surface is filled with hydrogen;

[0056] The drainage method of the secondary dehumidifier is the same as that of the pre-cooling primary dehumidifier and will not be repeated here.

[0057] D. The hydrogen transfer pressurization method is as follows:

[0058] The basic method of hydrogen transfer and pressurization is that the displacement fluid 4 enters the hydrogen storage tank from the bottom of the hydrogen storage tank along the liquid delivery pipeline under the drive of the liquid delivery booster 5; when the hydrogen discharge valve of the hydrogen storage tank is closed, as the liquid level of the displacement fluid 4 rises, the hydrogen pressure of the hydrogen storage tank continues to increase; when the hydrogen pipeline of the hydrogen storage tank is connected to another hydrogen storage tank, that is, the target hydrogen storage tank, and the hydrogen storage volume of the target hydrogen storage tank does not change, as the liquid level of the displacement fluid 4 rises, the pressure of the two hydrogen storage tanks rises at the same time, and the hydrogen is also transferred to the target hydrogen storage tank; due to the resistance of the hydrogen pipeline, the pipeline pressure drops, so during the transfer process, the hydrogen pressure transferred out of the hydrogen storage tank is greater than the pressure of the target hydrogen storage tank;

[0059] When the liquid delivery booster 5 is working, the replacement fluid 4 flows into the pump through the infusion valve 33, which is a forward working mode; when the replacement fluid 4 flows out of the liquid delivery booster 5 and passes through the infusion valve 33, which is a reverse working mode;

[0060] Before hydrogen transfer and pressurization operation, the gas pipeline and liquid pipeline must be connected first;

[0061] Connect the gas pipeline:

[0062] Close the gas supply control valve 85 and the hydrogen control valve 12, connect the gas supply pipe connector 82, open the gas supply pipe exhaust control valve 83, and under normal working conditions, the pipeline from the gas supply control valve 85 to the downstream is already filled with hydrogen; open the gas supply pipe infusion control valve 88, and the replacement fluid 4 enters the pipeline connected to the gas supply inclined pipe 86 and the gas supply pipe connector 82, the liquid level continues to rise, and at the same time, the replacement fluid 4 discharges the air in all the spaces it fills; after the gas supply pipe level gauge 84 detects the liquid level signal, close the gas supply pipe exhaust control valve 83 and the gas supply pipe infusion control valve 88; open the gas supply control valve 85, the hydrogen control valve 12, the control valve 83, and the gas supply pipe infusion control valve 88. Hydrogen valve 22; at this time, when the hydrogen pressure in the first storage tank 1 is greater than the pressure in the second storage tank 2, the hydrogen in the first storage tank 1 will flow to the second storage tank 2, and the replacement fluid 4 in the gas pipeline connector 8 will be input into the second storage tank 2 together; and when the hydrogen pressure in the first storage tank 1 is less than the pressure in the second storage tank 2, the hydrogen in the second storage tank 2 will flow into the first storage tank 1, and the replacement fluid 4 in the gas pipeline connector 8 will be input into the first storage tank 1 together; after the replacement fluid 4 in the gas pipeline connector 8 is discharged into the hydrogen storage tank, the hydrogen control valve 22, the hydrogen control valve 12 and the gas control valve 85 are closed, and the gas pipeline is connected and ready for use.

[0063] Connect the infusion line:

[0064] Connect the infusion tube connector 72, open the infusion valve 31, infusion valve 33, infusion valve 39, infusion valve 34, infusion valve 35, and infusion tube exhaust control valve 73, and close the remaining valves; the infusion pipeline from the infusion control valve 75 to the replacement fluid storage tank 9 is connected and filled with replacement fluid 4; open the infusion control valve 75, and at the same time start the liquid delivery booster 5 and run it forward, the replacement fluid 4 flows into the infusion inclined tube 76, the infusion tube connector 72 and its connecting pipeline, the liquid level continues to rise, and at the same time, the air in all spaces filled with the replacement fluid 4 is discharged; after the infusion tube liquid level gauge 74 detects the liquid level signal, the infusion tube exhaust control valve 73 is turned off, the liquid delivery booster 5 is shut down, and the infusion valve 31, infusion valve 33, infusion valve 34, infusion valve 39, infusion valve 35, and infusion control valve 75 are closed. The infusion pipeline is connected and ready for use.

[0065] The following is a description of the hydrogen replacement, transfer, and pressurization operation between the first storage tank 1, the second storage tank 2, the replacement liquid storage tank 9, and the user-end gas cylinder. The operation is divided into two aspects: hydrogen transfer and pressurization, and the transfer of the replacement liquid 4 in the first storage tank 1 after the hydrogen replacement and transfer is completed.

[0066] First, hydrogen transfer pressurization:

[0067] Hydrogen transfer boosting is divided into three categories:

[0068] The first type, hydrogen isobaric transfer:

[0069] The hydrogen pressure in the first storage tank 1 is the same as that in the second storage tank 2. This method is used to transfer the hydrogen in the first storage tank 1 to the second storage tank 2 using the replacement fluid 4 in the second storage tank 2.

[0070] For the gas pipeline, open the hydrogen control valve 12, gas control valve 85, and hydrogen control valve 22, and close the remaining valves.

[0071] In the infusion line, open the infusion valve 33, infusion valve 31, second valve 23, first valve 13, and infusion control valve 75, and close the remaining valves;

[0072] The liquid delivery booster 5 is started to operate in the forward direction, and the replacement fluid 4 in the second storage tank 2 is delivered to the first storage tank 1 in a forward delivery manner, so that the hydrogen in the first storage tank 1 is transferred to the second storage tank 2, and the hydrogen pressure in the second storage tank 2 does not change. Because the hydrogen pressure in the first storage tank 1 is the same as the hydrogen pressure in the second storage tank 2, the work output by the liquid delivery booster 5 is only the work done to overcome the friction resistance encountered by the replacement fluid 4 when flowing in the pipeline and the change in the gravitational potential energy of the liquid. This hydrogen transfer method is energy-saving.

[0073] The second category, hydrogen pressure transfer and hydrogen boosting, refers to the simultaneous increase in the pressure of both the hydrogen leaving the hydrogen storage container and the target hydrogen storage container during the transfer process, or the pressurization of a hydrogen storage tank;

[0074] In the first case, the displacement fluid 4 in the displacement fluid storage tank 9 is delivered to the first storage tank 1 through the liquid delivery booster 5, and the hydrogen in the first storage tank 1 is transferred to the second storage tank 2;

[0075] In the gas pipeline, open the hydrogen control valve 12, the gas control valve 85, and the hydrogen control valve 22, and close the remaining valves; if the pressure in the second storage tank 2 is greater than that in the first storage tank 1, the hydrogen in the second storage tank 2 will flow into the first storage tank 1;

[0076] In the infusion line, open the infusion valve 33, infusion valve 31, infusion valve 34, infusion valve 35, infusion valve 39, first valve 13, and infusion control valve 75, and close the remaining valves;

[0077] The liquid delivery booster 5 is started to run forward, and the displacement fluid 4 in the displacement fluid storage tank 9 is delivered to the first storage tank 1, so that the hydrogen in the first storage tank 1 is transferred and delivered to the second storage tank 2, and the hydrogen in the two storage tanks is pressurized at the same time.

[0078] In the second case, the displacement liquid 4 in the displacement liquid storage tank 9 is delivered to the first storage tank 1 through the liquid delivery booster 5, and the hydrogen in the first storage tank 1 is transferred to the user-end gas cylinder through the pre-cooling dehumidifier 10 and the hydrogenation machine;

[0079] In the gas transmission pipeline, open the hydrogen control valve 12, gas transmission control valve 85, gas outlet valve 27, precooler inlet valve 1030, and hydrogen supply valve 1033; close the remaining valves; when the pressure in the first storage tank 1 is greater than the pressure in the user-end gas cylinder, the hydrogen in the first storage tank 1 flows into the user-end gas cylinder until the pressure is balanced and the flow stops;

[0080] In the infusion line, open the infusion valve 33, infusion valve 31, infusion valve 34, infusion valve 35, infusion valve 39, first valve 13, and infusion control valve 75, and close the remaining valves;

[0081] Start the liquid delivery booster 5 to run forward, deliver the displacement liquid 4 in the displacement liquid storage tank 9 to the first storage tank 1, and deliver the hydrogen in the first storage tank 1 to the user-end gas cylinder through the pre-cooling dehumidifier 10 and the hydrogenator. The hydrogen in the first storage tank 1 and the user-end gas cylinder is pressurized at the same time.

[0082] In the third case, the replacement fluid 4 in the replacement fluid storage tank 9 is delivered to the second storage tank 2 through the liquid delivery booster 5, and the hydrogen in the second storage tank 2 is delivered to the user-end gas cylinder;

[0083] In the gas transmission pipeline, open the outlet valve 26, the precooler inlet valve 1030, and the hydrogen supply valve 1033; the remaining valves are closed; when the pressure in the second storage tank 2 is greater than the pressure in the user-end gas cylinder, the hydrogen in the second storage tank 2 flows into the user-end gas cylinder until the pressure is balanced and the flow stops;

[0084] In the infusion line, open the infusion valve 33, infusion valve 32, infusion valve 35, and the second valve 23, and close the remaining valves;

[0085] Start the liquid delivery booster 5 to run in reverse, deliver the displacement liquid 4 in the displacement liquid storage tank 9 to the second storage tank 2, and transfer the hydrogen in the second storage tank 2 to the user-end gas cylinder through the pre-cooling dehumidifier 10 and the hydrogenator. The hydrogen in the second storage tank 2 and the user-end gas cylinder is pressurized at the same time.

[0086] In the fourth case, the replacement liquid 4 in the first storage tank 1 is delivered to the second storage tank 2 through the liquid delivery booster 5, and the hydrogen in the second storage tank 2 is transferred to the user-end gas cylinder through the pre-cooling dehumidifier 10;

[0087] In the gas transmission pipeline, open the outlet valve 26, the precooler inlet valve 1030, and the hydrogen supply valve 1033; the remaining valves are closed; when the pressure in the second storage tank 2 is greater than the pressure in the user-end gas cylinder, the hydrogen in the second storage tank 2 flows into the user-end gas cylinder until the pressure is balanced and the flow stops;

[0088] In the infusion line, open the infusion valve 31, infusion valve 33, second valve 23, first valve 13, and infusion control valve 75, and close the remaining valves;

[0089] Start the liquid delivery booster 5 to run in reverse, deliver the replacement liquid 4 in the first storage tank 1 to the second storage tank 2 through the liquid delivery booster 5, transfer the hydrogen in the second storage tank 2 to the user-end gas cylinder through the pre-cooling dehumidifier 10 and the hydrogenator, and pressurize the hydrogen in the second storage tank 2 and the user-end gas cylinder at the same time.

[0090] In the fifth case, the displacement fluid 4 in the displacement fluid storage tank 9 is delivered to the second storage tank 2 through the liquid delivery booster 5 to increase the pressure of the hydrogen in the second storage tank 2. This operation is sometimes performed when it is necessary to increase the tank pressure.

[0091] All gas pipelines are shut down;

[0092] In the infusion line, open the infusion valve 33, infusion valve 32, infusion valve 35, and the second valve 23, and close the remaining valves;

[0093] The liquid delivery booster 5 is started to run in reverse, and the displacement fluid 4 in the displacement fluid storage tank 9 is delivered to the second storage tank 2 in a reverse delivery manner, so that the hydrogen pressure in the second storage tank 2 is increased to the required pressure.

[0094] The third type is hydrogen pressure differential transfer, which means that the pressure of the hydrogen storage container is greater than the pressure of the target hydrogen storage container. Under the action of the pressure differential, hydrogen is transferred from the hydrogen storage container to the target hydrogen storage container without the need for the displacement fluid 4. However, as the hydrogen is transferred, the pressure differential will gradually decrease, and finally the pressure differential will reach zero to achieve equilibrium. If further transfer and pressure increase are required, a liquid delivery booster 5 can be used to push the displacement fluid 4 for displacement transfer and pressure increase.

[0095] In the first case, when the hydrogen pressure in the first storage tank 1 is greater than the hydrogen pressure in the second storage tank 2, the hydrogen in the first storage tank 1 is transferred to the second storage tank 2 through the hydrogen pressure difference;

[0096] In the gas transmission pipeline, open the hydrogen control valve 12, the gas transmission control valve 85, and the hydrogen control valve 22, and close the remaining valves.

[0097] In the second case, the hydrogen pressure in the first storage tank 1 is greater than the pressure of the user-end gas cylinder. The hydrogen in the first storage tank 1 is transferred to the user-end gas cylinder through the pre-cooling dehumidifier 10 by the hydrogen pressure difference.

[0098] For the gas transmission pipeline, open the hydrogen control valve 12, gas transmission control valve 85, gas outlet valve 27, precooler air inlet valve 1030, and hydrogen supply valve 1033; close the remaining valves.

[0099] In the third case, when the hydrogen pressure in the second storage tank 2 is greater than the pressure in the user-end gas cylinder, the hydrogen in the second storage tank 2 is transferred to the user-end gas cylinder through the pre-cooling dehumidifier 10 by the hydrogen pressure difference;

[0100] Gas pipeline, open the gas valve 26, pre-cooler inlet valve 1030, hydrogen supply valve 1033; the rest of the valve is closed.

[0101] In the second aspect, after the hydrogen transfer and pressure increase of the first tank 1, the displacement liquid 4 in the first tank 1 is transferred:

[0102] In the first case, the displacement liquid 4 in the first tank 1 is transferred to the second tank 2.

[0103] Gas pipeline, close all valves;

[0104] Liquid pipeline, when the pressure of the first tank 1 is greater than that of the second tank 2, open the liquid valve 31, the liquid valve 32, the liquid valve 34, the liquid valve 39, the first valve 13, the second valve 23, and the liquid control valve 75, and close the rest of the valves. The pressure difference method is used for transfer until the pressure of the two tanks is balanced. When the pressure of the first tank 1 is less than or equal to that of the second tank 2, open the liquid valve 31, the liquid valve 33, the first valve 13, the second valve 23, and the liquid control valve 75, and close the rest of the valves. The liquid transfer booster 5 is started in reverse to transfer the displacement liquid 4 in the first tank 1 to the second tank 2, so that the pressure of the second tank 2 increases.

[0105] In the second case, the displacement liquid 4 in the first tank 1 is transferred to the displacement liquid tank 9.

[0106] Gas pipeline, close all valves;

[0107] Liquid pipeline, when the pressure of the first tank 1 is greater than that of the displacement liquid tank 9, open the liquid valve 31, the liquid valve 32, the liquid valve 35, the first valve 13, and the liquid control valve 75, and close the rest of the valves. Because there is enough hydrogen gas in the first tank 1, the pressure of the first tank 1 is greater than that of the displacement liquid tank 9. The displacement liquid 4 in the first tank 1 will flow into the displacement liquid tank 9 due to the pressure difference, and the pressure in the first tank 1 will gradually decrease. Open the liquid tank exhaust valve 91 of the displacement liquid tank 9 to discharge hydrogen gas to avoid the pressure in the tank from rising. When the pressure of the two tanks is balanced, the displacement liquid 4 stops flowing. When the pressure of the first tank 1 is less than or equal to that of the displacement liquid tank 9, open the liquid valve 31, the liquid valve 33, the liquid valve 39, the liquid valve 34, the liquid valve 35, the first valve 13, and the liquid control valve 75, and close the rest of the valves. Start the liquid transfer booster 5 in reverse to transfer the displacement liquid 4 in the first tank 1 to the displacement liquid tank 9, and at the same time open the liquid tank exhaust valve 91 of the displacement liquid tank 9 to discharge hydrogen gas to avoid the pressure in the tank from rising.

[0108] The device also provides a third tank 20, which is related to the hydrogen displacement transfer and pressure increase operation between the third tank 20, the first tank 1, the second tank 2, the displacement liquid tank 9, and the user end gas cylinder. The principle is the same as described above, and will not be repeated here.

[0109] The following is the operation of transferring the displacement liquid 4 in the displacement liquid storage tank 9 to the second storage tank 2, and transferring the hydrogen in the second storage tank 2 to the third storage tank 20 for pressure boosting;

[0110] The gas delivery pipeline, the hydrogen control valve 22 and the hydrogen control valve 202 are opened, and the remaining valves are closed; when the pressure of the second storage tank 2 is greater than that of the third storage tank 20, the hydrogen in the second storage tank 2 flows into the third storage tank 20 due to the pressure difference until the pressure is balanced; when the pressure of the second storage tank 2 is less than that of the third storage tank 20, the hydrogen in the third storage tank 20 flows into the second storage tank 2 until the pressure is balanced;

[0111] The liquid delivery pipeline, when the pressure of the second storage tank 2 is equal to that of the third storage tank 20, the liquid delivery valve 35, the liquid delivery valve 32, the liquid delivery valve 33, and the second valve 23 are opened, and the remaining valves are closed;

[0112] The liquid delivery booster 5 is started in reverse operation to transfer the displacement liquid 4 in the displacement liquid storage tank 9 to the second storage tank 2, and the hydrogen in the second storage tank 2 and the third storage tank 20 is simultaneously boosted in pressure, and the hydrogen in the second storage tank 2 is simultaneously transferred to the third storage tank 20.

[0113] Pent, in order to avoid the problem of icing in winter, the following method is adopted:

[0114] The first method is that the displacement liquid 4 is an anti-freezing solution;

[0115] The second method is that the tank body and the pipeline are covered with a heat preservation layer, and water at 5-30 DEG C is used;

[0116] The third method is that water at 5-30 DEG C is used, except for the water used in the hydrogen transfer and pressure boosting process, the hydrogen storage tank does not store water, and the remaining water is stored in the displacement liquid storage tank 9; thus, only the displacement liquid storage tank 9 and the pipeline are covered with a heat preservation layer.

[0117] In the present application, the first storage tank 1 is a high-pressure hydrogen tank of a tube bundle vehicle for transporting hydrogen to a hydrogen refueling station, and the second storage tank 2 and the third storage tank 20 are high-pressure hydrogen tanks arranged in the hydrogen refueling station; in actual situations, several high-pressure hydrogen tanks will be arranged in the hydrogen refueling station, but the basic operation principle is the same.

[0118] A key core problem of the present application is the design and preparation of the displacement liquid; if there is no available displacement liquid, the technology cannot be implemented; therefore, the present application solves the preparation of the displacement liquid, including the displacement liquid preparation process.

[0119] Since water is used as the displacement liquid, the high-pressure hydrogen outlet end must contain water, and the current hydrogen production process also causes the hydrogen to contain water; in addition, fuel cell vehicles have strict requirements on the water content of hydrogen; therefore, as a complete hydrogen refueling station equipment, an online hydrogen dehumidification device must be configured.

[0120] The present invention is a brand-new technology for hydrogen transfer and pressurization technology, especially for hydrogen unloading, pressurization and filling technology at hydrogen refueling stations. The present invention improves the operating efficiency of hydrogen refueling stations, reduces equipment costs and operating costs, and has multiple beneficial effects.

[0121] Currently, hydrogen boosting both domestically and internationally uses hydrogen compressors, which suffer from high manufacturing costs and low operating efficiency. Furthermore, high-pressure, high-flow hydrogen compressors above 70 MPa are difficult to manufacture, resulting in higher equipment costs and a negative impact on the development of hydrogen energy. The present invention utilizes a high-pressure liquid pump to indirectly boost hydrogen pressure. Compared to hydrogen compressors, high-pressure liquid pumps offer advantages such as mature technology, low manufacturing costs, and high operating efficiency. Therefore, the present invention can be applied to hydrogen refueling stations to reduce equipment and operating costs.

[0122] Currently, hydrogen refueling stations both domestically and internationally use a pressure differential principle to unload hydrogen from tube bundle trucks. Later, hydrogen compressors are used to extract and pressurize the hydrogen. This takes a long time, and because extraction slows down after the pressure drops, a significant amount of hydrogen, approximately 2 to 4 MPa, is ultimately left behind. This current hydrogen unloading method suffers from long unloading times and low hydrogen transportation efficiency. The liquid displacement hydrogen unloading method of the present invention completely resolves these issues, enabling rapid hydrogen unloading, improving hydrogen transportation efficiency, and reducing transportation costs.

[0123] 3. Currently, when hydrogen is unloaded from tube bundle trucks at hydrogen refueling stations at home and abroad, the connecting pipes must be repeatedly purged with hydrogen to remove the air. However, this is not completely purged and replaced, which not only wastes hydrogen but also requires the installation of emission facilities for safety reasons, increasing operating costs. The pipe connection device in this solution makes pipe connection safe, reliable and convenient.

[0124] 4. Moisture is sometimes introduced during hydrogen production, and fuel cell vehicles and other applications have high requirements for hydrogen humidity. This solution incorporates a hydrogen pre-cooling and dehumidification device, which fully utilizes the condensation and crystallization of moisture during the pre-cooling process to remove the original moisture in the hydrogen, as well as moisture generated during the pressurization process. This removes moisture without increasing energy consumption, resulting in energy savings. Furthermore, this solution utilizes a centrifugal impurity removal device to remove tiny solid particles from the hydrogen, effectively removing impurities from the hydrogen.

[0125] A key issue in the present invention is the design and preparation of the replacement fluid. Using water as one of the replacement fluids in the present invention offers the greatest advantages of low cost and easy availability. Water contains dissolved oxygen and other gases, and even after filtration and softening, these gases remain, which is unacceptable to fuel cells. Therefore, the present invention incorporates a decontamination device to address this issue.

[0126] 6In the hydrogen transfer pressurization process, the differential pressure transfer is used, that is, the high-pressure hydrogen source is used to charge the low-pressure storage tank, which can waste part of the pressure energy of hydrogen. The hydrogen charging of the high-pressure gas cylinder of the customer uses the pressurization mode, which can save energy. BRIEF DESCRIPTION OF DRAWINGS

[0127] Figure 1 The hydrogen transfer pressurization and dehumidification device for hydrogen filling station is shown in the schematic diagram.

[0128] Figure 2 The pipeline connection of the liquid delivery pipeline connector 7 is shown in the schematic diagram.

[0129] Figure 3 The pipeline connection of the gas delivery pipeline connector 8 is shown in the schematic diagram.

[0130] Figure 4 The exhaust cavity and the liquid exhaust cavity provided for the first storage tank 1, the second storage tank 2 and the third storage tank 20 are shown in the schematic diagram.

[0131] Figure 5 The pipeline structure of the displacement liquid storage tank 9 and the impurity remover 6 is shown in the schematic diagram.

[0132] Figure 6 The first storage tank 1, the second storage tank 2, the third storage tank 20 and the connecting pipeline structure are shown in the schematic diagram.

[0133] Figure 7 The pipeline structure of the pre-cooling dehumidifier 10 is shown in the schematic diagram.

[0134] The accompanying drawings are marked as follows: 1. first storage tank; 2. second storage tank; 4. replacement fluid; 5. liquid delivery booster; 6. impurity remover; 7. infusion line connector; 8. gas line connector; 9. replacement fluid storage tank; 10. pre-cooling dehumidifier; 11. first pressure detector; 12. hydrogen control valve; 13. first valve; 18a. exhaust chamber; 18b. exhaust chamber; 18c. exhaust chamber; 19a. drainage chamber; 19b. drainage chamber; 19c. drainage chamber; 20. third storage tank; 21. second pressure detector; 22. hydrogen control valve; 23. second valve; 26. outlet valve; 27. outlet valve; 31. infusion valve; 32. infusion valve; 33. infusion valve; 34. 4. Infusion valve; 35. Infusion valve; 36. Infusion valve; 37. Infusion valve; 38. Infusion valve; 39. Infusion valve; 60. Exhaust valve A for dust collector; 61. Discharge pump for dust collector; 62. Discharge control valve for dust collector; 63. Inlet control valve for dust collector; 64. Spray control valve for dust collector; 65. Inlet nozzle for dust collector; 66. Inlet control valve for dust collector; 67. Exhaust valve B for dust collector; 68. Exhaust vacuum pump for dust collector; 69. Liquid level detector for dust collector; 72. Connector for dust collector tube; 73. Exhaust control valve for dust collector tube; 74. Liquid level gauge for dust collector tube; 75. Infusion control valve; 76. Infusion oblique tube; 82. Connector for gas pipe; 83. Gas pipe Pipe exhaust gas control valve; 84, gas pipeline level gauge; 85, gas control valve; 86, gas inclined pipe; 88, gas pipeline liquid infusion control valve; 91, liquid storage tank exhaust valve; 92, liquid storage tank air inlet valve; 93, liquid storage tank level detector; 101, precooling pressure vessel; 102, dehumidification pressure vessel; 201, third pressure detector; 202, hydrogen control valve; 203, third valve; 206, outlet valve; 1011, first heat exchanger; 1012, insulation layer; 1013, precooler drain tank; 1014, drain tank air inlet valve; 1015, precooler drain valve; 1016, precooler lower level gauge; 1017, precooler middle level gauge; 10 18. Liquid level gauge on precooler; 1019. Precooler drain valve; 1021. Second heat exchanger; 1022. Secondary dehumidifier insulation layer; 1023. Dehumidification drain tank; 1024. Dehumidification drain tank air inlet valve; 1025. Dehumidification drain outlet valve; 1026. Dehumidification lower liquid level gauge; 1027. Dehumidification middle liquid level gauge; 1028. Dehumidification upper liquid level gauge; 1029. Dehumidification drain valve; 1030. Precooler air inlet valve; 1031. Precooler temperature detector; 1032. Pressure detector; 1033. Hydrogen supply valve; 1034. Drain buffer; 1035. Dehumidification drain buffer; 1036. Pressure detector; 1037. Hydrogen transmission pipe. DETAILED DESCRIPTION

[0135] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments:

[0136] Please refer to this paragraph and the following two paragraphsFigure 1 A hydrogen transfer, boosting and dehumidification device for a hydrogen refueling station includes a first storage tank 1, a second storage tank 2, a displacement liquid storage tank 9, a liquid delivery booster 5, an infusion valve 31, an infusion valve 32, an infusion valve 33, an infusion valve 34, an infusion valve 35, an infusion valve 36, an infusion valve 37, an infusion valve 38, and an infusion valve 39; the two ports of the liquid delivery booster 5 and each infusion valve are R port and L port respectively; the liquid delivery booster 5 has the functions of forward and reverse delivery, boosting and flow regulation of the liquid, and the pressure difference between the outlet and the inlet is the boosted pressure;

[0137] The hydrogen transfer, pressurizing and dehumidifying device for a hydrogen refueling station includes a liquid delivery pipeline connector 7 and a gas delivery pipeline connector 8, the two ports of which are R port and L port respectively; the hydrogen transfer, pressurizing and dehumidifying device for a hydrogen refueling station is also provided with a dehumidifier 6;

[0138] The first storage tank 1, the second storage tank 2 and the displacement fluid storage tank 9 are all pressure vessels, the middle sections of which are cylindrical and the two ends are set as curved heads. The working pressures of the first storage tank 1 and the second storage tank 2 are both 0.01MPa to 500MPa, and the working pressure of the displacement fluid storage tank 9 is 0.01MPa to 20MPa.

[0139] Please refer to this paragraph and the following paragraph Figure 6 The angle between the axis of the first storage tank 1 and the horizontal plane is δ, and the range of δ is 0° to 90°. Its two ends are respectively end B and end C. When δ is greater than 0°, end B is higher than end C. The end B of the first storage tank 1 is provided with a hydrogen pipeline communicating with the outside of the tank, and a first pressure detector 11 and a hydrogen control valve 12. The end C of the first storage tank 1 is provided with a liquid pipeline communicating with the outside of the tank, and the liquid pipeline is provided with a first valve 13 on the outside of the tank. The first storage tank 1 stores hydrogen to be transferred out.

[0140] The angle between the axis of the second storage tank 2 and the horizontal plane is β, and the range of β is 0° to 90°. Its two ends are D and E respectively. When β is greater than 0°, the D end is higher than the E end; the D end of the second storage tank 2 is provided with a hydrogen pipeline connecting the inside of the tank with the outside of the tank, and is provided with a second pressure detector 21, a hydrogen control valve 22 and an outlet valve 26; the E end of the second storage tank 2 is provided with a liquid pipeline connecting the inside of the tank with the outside of the tank, and the liquid pipeline is provided with a second valve 23 on the outside of the tank; the other end of the second valve 23 is connected to the R port of the infusion valve 33 and the L port of the infusion valve 39; the second storage tank 2 is provided with a replacement fluid 4, which is a liquid; hydrogen is stored above the liquid surface of the replacement fluid 4, and the volume of the replacement fluid 4 accounts for 0% to 99% of the internal volume of the second storage tank 2; the hydrogen pressure in the first storage tank 1 and the second tank 2 is always greater than 0.01MPa.

[0141] Please refer to this paragraph Figure 5The replacement fluid storage tank 9 is a storage tank for storing the replacement fluid 4, and hydrogen is set in the space above the liquid level of the replacement fluid 4; a liquid tank exhaust valve 91 and a liquid tank air inlet valve 92 are set on the top of the replacement fluid storage tank 9, and a liquid tank level detector 93 is set on the outer wall of the bottom of the replacement fluid storage tank 9. An infusion pipeline is also set at the bottom, which is connected to the R port of the infusion valve 35 and the L port of the infusion valve 36; the hydrogen pressure in the replacement fluid storage tank 9 is always greater than 0.01MPa.

[0142] Please refer to this paragraph Figure 1 The L port of the infusion pipeline connector 7 is connected to the first valve 13, and the R port at the other end is connected to the L port of the infusion valve 31. The R port of the infusion valve 31 is connected to the L port of the liquid delivery booster 5 and the L port of the infusion valve 32. The R port of the liquid delivery booster 5 is connected to the L port of the infusion valve 33. The R port of the infusion valve 32 is connected to the L port of the infusion valve 35 and the R port of the infusion valve 34. The R port of the infusion valve 39 is connected to the L port of the infusion valve 34.

[0143] Please refer to this paragraph Figure 2 The infusion line connector 7 includes an infusion line connection joint 72, an infusion line control valve 75, an infusion line exhaust control valve 73, an infusion line level gauge 74 and a pipeline; the L port of the infusion line connector 7 is internally connected to the infusion line connection joint 72, and the R port of the infusion line connector 7 is internally connected to the infusion line control valve 75; the other end of the infusion line connection joint 72 is connected to the infusion inclined tube 76, and the other end of the infusion inclined tube 76 is connected to two components, one is connected to the infusion line exhaust control valve 73 upwards, and the other is connected to the infusion line exhaust control valve 73 upwards. The infusion control valve 75 is connected obliquely downward at an angle of β5 with the horizontal plane, and the range of β5 is 1° to 70°; the angle between the axis of the infusion inclined tube 76, the infusion tube connecting joint 72 and the pipeline connected to the infusion tube connecting joint 72 and the first valve 13 is β1 with the horizontal plane, and the range of β1 is 20° to 90°, and the position of the infusion tube connecting joint 72 is higher than the first valve 13; the other end of the pipeline of the infusion tube exhaust control valve 73 is provided with an infusion tube level gauge 74 and a pipeline connected to the atmosphere.

[0144] Please refer to this paragraph and the following paragraph Figure 3 The gas pipeline connector 8 includes a gas pipeline connection joint 82, a gas pipeline exhaust control valve 83, a gas pipeline control valve 85, a gas pipeline liquid infusion control valve 88, a gas pipeline liquid level gauge 84 and a pipeline; the L port of the gas pipeline connector 8 is connected to the hydrogen control valve 12, and the other end R port is connected to the hydrogen control valve 22, please refer to Figure 1 ;

[0145] The L-port end of the gas pipeline connector 8 is internally connected to the gas pipeline connecting joint 82, and the R-port of the other end of the gas pipeline connector 8 is internally connected to the gas control valve 85; the other end of the gas pipeline connecting joint 82 is connected to the gas inclined pipe 86 and the gas pipeline infusion control valve 88; the other end of the gas inclined pipe 86 is connected to two components, one is connected to the gas pipeline exhaust control valve 83 upward, and the other is connected to the gas control valve 85 obliquely downward at an angle of β6 with the horizontal plane, and the range of β6 is 1° to 70°; The angle between the axis of the inclined tube 86, the gas pipe connecting joint 82, and the pipeline connected to the gas pipe connecting joint 82 and the hydrogen control valve 12 and the horizontal plane is β2, and the range of β2 is 20° to 90°, and the position of the gas pipe connecting joint 82 is higher than the hydrogen control valve 12; the other end of the gas pipe exhaust control valve 83 is provided with a gas pipe level gauge 84 and a pipeline connected to the atmosphere; the other end of the gas pipe liquid infusion control valve 88 is connected to the pipeline with a replacement fluid 4, and its pressure is 0.001MPa to 0.2MPa.

[0146] Please refer to this paragraph and the following paragraph Figure 6 Furthermore, the hydrogen transfer, pressurizing and dehumidifying device for the hydrogen refueling station includes a third storage tank 20; the third storage tank 20 is a pressure vessel, the middle section of which is cylindrical, and both ends are provided with curved heads, and the working pressure is 0.01MPa to 500MPa;

[0147] The angle between the axis of the third storage tank 20 and the horizontal plane is β4, and the range of β4 is 0° to 90°. Its two ends are respectively D3 and E3. When β4 is greater than 0°, D3 is higher than E3. The D3 end of the third storage tank 20 is provided with a hydrogen pipeline connecting the inside of the tank with the outside of the tank, and is also provided with a third pressure detector 201, a hydrogen control valve 202 and an outlet valve 206. The E3 end of the third storage tank 20 is provided with a liquid pipeline connecting the inside of the tank with the outside of the tank, and the external section of the liquid pipeline is provided with a third valve 203. The other end of the third valve 203 is connected to the R port of the infusion valve 39 and the L port of the infusion valve 34. The third storage tank 20 is provided with a replacement fluid 4, and hydrogen is stored above the liquid surface of the replacement fluid 4. The volume of the replacement fluid 4 accounts for 0% to 99% of the internal volume of the third storage tank 20. The hydrogen pressure in the third storage tank 20 is always greater than 0.01 MPa.

[0148] Please refer to this paragraph Figure 1 The hydrogen control valve 202 of the third storage tank 20 and the hydrogen control valve 22 of the second storage tank 2 are both connected to the R port of the gas pipeline connector 8 and the L port of the gas outlet valve 27; the gas outlet valve 206 of the third storage tank 20 and the gas outlet valve 26 of the second storage tank 2 are both connected to the R port of the gas outlet valve 27.

[0149] Please refer to this paragraph and the following paragraph Figure 4Furthermore, the outlet positions of the hydrogen pipelines communicating with the outside of the tank at the B end of the first storage tank 1, the D end of the second storage tank 2, and the D3 end of the third storage tank 20 are all set at the highest point of the end; the outlet positions of the liquid pipelines communicating with the outside of the tank at the C end of the first storage tank 1, the E end of the second storage tank 2, and the E3 end of the third storage tank 20 are all set at the lowest point of the end.

[0150] Furthermore, the first storage tank 1, the second storage tank 2, and the third storage tank 20 are respectively provided with an exhaust chamber 18a, an exhaust chamber 18b, and an exhaust chamber 18c, which are respectively located at the highest points of the B end, the D end, and the D3 end. The exhaust chamber 18a, the exhaust chamber 18b, and the exhaust chamber 18c are all rotating bodies, and the hydrogen pipeline outlets of the B end, the D end, and the D3 end are respectively provided at the exhaust chamber 18a, the exhaust chamber 18b, and the exhaust chamber 18c. The highest point; the first storage tank 1, the second storage tank 2, and the third storage tank 20 are respectively provided with a drainage cavity 19a, a drainage cavity 19b, and a drainage cavity 19c, and the drainage cavity 19a, the drainage cavity 19b, and the drainage cavity 19c are respectively located at the lowest points of the C end, the E end, and the E3 end. The drainage cavity 19a, the drainage cavity 19b, and the drainage cavity 19c are all rotating bodies, and the liquid pipeline outlets of the C end, the E end, and the E3 end are respectively arranged at the lowest points of the drainage cavity 19a, the drainage cavity 19b, and the drainage cavity 19c.

[0151] Please refer to this paragraph and the following two paragraphs Figure 5 Regarding the structure of the impurity remover 6; the working pressure of the impurity remover 6 is 0.005MPa to 0.5MPa absolute pressure, the middle section of which is cylindrical, and both ends are provided with curved heads; the top of the impurity remover 6 is provided with an impurity remover exhaust valve B67 and an impurity remover air intake control valve 66, and the other end of the impurity remover exhaust valve B67 is connected to the impurity remover exhaust vacuum pump 68; the highest point of the top of the impurity remover 6 is provided with an impurity remover exhaust valve A60; the impurity remover air intake control valve 66 is connected to the hydrogen pipeline, and its pressure is 0.001MPa to 0.03MPa;

[0152] The bottom of the impurity remover 6 is provided with a discharge pipeline and a connected impurity remover liquid control valve 62, an inlet pipeline and a connected impurity remover liquid inlet control valve 63; the impurity remover liquid inlet control valve 63 is connected to the replacement fluid pipeline to be removed, and the pressure of the replacement fluid to be removed in the pipeline is 0.05MPa to 0.5MPa; the other end of the impurity remover liquid outlet control valve 62 is connected to the inlet of the impurity remover liquid outlet pump 61 and the R port of the infusion valve 38, and the suction lift of the impurity remover liquid outlet pump 61 is greater than 5m; the outlet of the impurity remover liquid outlet pump 61 is connected to the R port of the infusion valve 36 and the R port of the infusion valve 37; a impurity remover liquid level detector 69 is provided on the outer wall of the bottom of the impurity remover 6;

[0153] A de-impurifier liquid spray control valve 64 is provided on the upper part of the de-impurifier 6, and a de-impurifier liquid inlet nozzle 65 is provided on the upper part of the interior of the de-impurifier 6, and the two are connected by a pipeline passing through the tank wall of the de-impurifier 6; the de-impurifier liquid spray control valve 64 is connected to the replacement fluid pipeline to be de-impurized, and the replacement fluid to be de-impurized has a pressure of 0.05MPa to 1MPa and a temperature of 5°C to 98°C; the de-impurifier liquid inlet nozzle 65 sprays the replacement fluid to be de-impurized into atomized form in the de-impurifier 6; the de-impurifier 6 can eliminate gaseous impurities dissolved in the replacement fluid 4.

[0154] The replacement fluid 4 is water.

[0155] Please refer to this paragraph and the following 5 paragraphs Figure 7 , regarding the structure of the precooling dehumidifier 10; the hydrogen transfer boosting dehumidification device for the hydrogen refueling station is provided with a precooling dehumidifier 10, and the precooling dehumidifier 10 is composed of a precooling primary dehumidifier and a secondary dehumidifier; the precooling primary dehumidifier precools and dehumidifies the hydrogen once, and the secondary dehumidifier further separates the moisture in the hydrogen;

[0156] The pre-cooling primary dehumidifier is composed of a pre-cooling pressure vessel 101 and other components; a first heat exchanger 1011 is provided in the pre-cooling pressure vessel 101, and its surface temperature is -80°C to -5°C; the pre-cooling pressure vessel 101 is also provided with a hydrogen inlet pipeline and a pre-cooler air inlet valve 1030 connected to the pipeline, and the hydrogen inlet pipeline junction is located below the first heat exchanger 1011; an insulation layer 1012 is provided on the outer surface of the pre-cooling pressure vessel 101 to keep the air cool; a pre-cooler temperature detector 1031 is provided on the top of the pre-cooling pressure vessel 101; an anti-ice and snow coating is provided on the surface of the first heat exchanger 1011 and the inner surface of the pre-cooling pressure vessel 101;

[0157] A drain pipe is provided at the bottom of the precooling pressure vessel 101, and a precooler upper liquid level gauge 1018 is provided on the drain pipe. A precooler drain valve 1019 is provided on the drain pipe below the precooler upper liquid level gauge 1018. A precooler drain tank 1013 is connected below the precooler drain valve 1019. The precooler drain tank 1013 is a pressure vessel, and a pressure detector 1032 and a drain tank air inlet valve 1014 are provided on the top of the precooler drain tank 1013. The drain tank air inlet valve 1014 is connected to the drain tank 1013. The connected pipeline contains hydrogen with a pressure of 0.01MPa to 5MPa; a precooler middle liquid level gauge 1017 and a precooler lower liquid level gauge 1016 are provided on the middle outer wall and lower outer wall of the precooler drainage tank 1013; a precooler drain valve 1015 is provided at the bottom of the precooler drainage tank 1013, and the precooler drain valve 1015 is connected to a U-shaped drainage pipeline with an outlet facing upward. A drainage buffer 1034 is provided at the outlet to prevent the impact of high-pressure drainage on the outside;

[0158] The secondary dehumidifier is composed of a dehumidification pressure vessel 102 and other components. The top of the dehumidification pressure vessel 102 is a hemispherical body. A hydrogen outlet pipeline and a hydrogen supply valve 1033 connected to the hemispherical body are arranged at the top. A cylinder is arranged below the hemispherical body, and the bottom is a curved head. A hydrogen transmission pipe 1037 is arranged at the top of the pre-cooling pressure vessel 101. The hydrogen transmission pipe 1037 is connected to the dehumidification pressure vessel 102. The connection point between the hydrogen transmission pipe 1037 and the dehumidification pressure vessel 102 is located at the connection part of the spherical body and the cylinder. The direction of the pipeline at the connection point is horizontal and downward, and the angle β3 with the horizontal plane is in the range of 0° to 45°. The direction of the pipeline at the connection point is tangent to the inner surface of the cylinder of the dehumidification pressure vessel 102. The hydrogen transmission pipe 1037 and the inner surface of the dehumidification pressure vessel 102 are coated with anti-ice and snow paint.

[0159] A drainage pipe is provided at the bottom of the dehumidification pressure vessel 102, and a dehumidification upper liquid level gauge 1028 is provided on the drainage pipe. A dehumidification drainage valve 1029 is provided below the dehumidification upper liquid level gauge 1028, and a dehumidification drainage tank 1023 is connected and provided below the dehumidification drainage valve 1029; the dehumidification drainage tank 1023 is a pressure vessel, and a pressure detector 1036 and a dehumidification drainage tank air inlet valve 1024 are provided on the top thereof; the pipeline connected to the dehumidification drainage tank air inlet valve 1024 is a hydrogen pipeline, and the pressure is 0.01MPa To 5MPa; a dehumidification middle liquid level gauge 1027 and a dehumidification lower liquid level gauge 1026 are provided on the middle outer wall and the lower outer wall of the dehumidification drainage tank 1023; a dehumidification drainage outlet valve 1025 is provided at the bottom of the dehumidification drainage tank 1023, and the drainage pipeline connected to the dehumidification drainage outlet valve 1025 is provided as a U-shaped drainage pipeline, with the outlet facing upward, and a dehumidification drainage buffer 1035 is provided at the outlet to prevent the impact of high-pressure drainage on the outside; a cold-keeping secondary dehumidifier insulation layer 1022 is provided on the upper outer surface of the dehumidification pressure vessel 102.

[0160] Furthermore, a second heat exchanger 1021 is provided in the pre-cooling pressure vessel 101. The second heat exchanger 1021 is arranged in the space above the hydrogen inlet pipe intersection and below the first heat exchanger 1011, and its surface temperature is 0.1°C to 5°C; the surface of the second heat exchanger 1021 is provided with an anti-ice and snow paint coating.

[0161] Please refer to this paragraph Figure 1 The R port of the outlet valve 27 is connected to the precooler inlet valve 1030; the hydrogen supply valve 1033 is connected to the user-end gas cylinder via a pipeline and a hydrogenation machine. The outer surfaces of the second storage tank 2, the third storage tank 20, the displacement fluid storage tank 9, and the infusion pipeline are all provided with an insulation layer to prevent the water from freezing during winter. The outer surfaces of the hydrogen transmission pipe 1037 and the hydrogen transmission pipeline downstream of the dehumidification pressure vessel 102 are also provided with a cold insulation layer to prevent excessive heating of the pre-cooled hydrogen.

[0162] The method for using the hydrogen transfer, pressurization and dehumidification device for a hydrogen refueling station of the present invention uses the hydrogen transfer, pressurization and dehumidification device for a hydrogen refueling station as described above.

[0163] A, please refer to Figure 5 , the impurity removal steps of the impurity remover 6 are:

[0164] The first step is to remove the air in the impurity remover 6:

[0165] Open the impurity remover exhaust valve A60 and close other valves;

[0166] Open the impurity remover liquid inlet control valve 63, and the replacement fluid to be removed flows into the impurity remover 6; as the liquid level rises, the air in the impurity remover 6 is discharged from the impurity remover exhaust valve A60; when the impurity remover exhaust valve A60 discharges the replacement fluid to be removed, the impurity remover 6 is completely filled with the replacement fluid to be removed, and the air has been exhausted, and the impurity remover liquid inlet control valve 63 and the impurity remover exhaust valve A60 are closed;

[0167] The second step is to form a hydrogen cavity and negative pressure:

[0168] Open the infusion valve 38, the impurity remover outlet control valve 62, and the impurity remover air inlet control valve 66, and close the remaining valves; discharge the replacement fluid to be removed and simultaneously introduce hydrogen; when the liquid level drops by 5% to 50%, first close the impurity remover air inlet control valve 66, then close the infusion valve 38, open the infusion valve 37, and start the impurity remover outlet pump 61 to pump out the liquid; make the hydrogen pressure in the impurity remover 6 less than one atmosphere;

[0169] The third step is to remove impurities:

[0170] When the liquid level drops by 70% to 99%, the impurity remover spray control valve 64 is opened, and the replacement fluid to be removed is sprayed into the impurity remover 6 through the impurity remover liquid inlet nozzle 65 and atomized, and the pressure in the impurity remover 6 is controlled to an absolute pressure of 0.005 MPa to 0.15 MPa; the gases other than hydrogen dissolved in the replacement fluid to be removed are fully separated; the infusion valve 37 is closed and the infusion valve 36 is opened, and the replacement fluid 4 after impurity removal is transferred to the replacement fluid storage tank 9;

[0171] The fourth step is to reduce the concentration of hydrogen impurities:

[0172] When it is necessary to remove the hydrogen contained in the impurity gas in the impurity remover 6, open the impurity remover exhaust valve B67 and start the impurity remover exhaust vacuum pump 68 to discharge the hydrogen with high impurity concentration. At the same time, open the impurity remover air intake control valve 66 to introduce pure hydrogen; delay the shutdown of the impurity remover exhaust valve B67, the impurity remover exhaust vacuum pump 68, and the impurity remover air intake control valve 66 to continue the impurity removal operation.

[0173] B, please refer to Figure 7The pre-cooling and dehumidification process of hydrogen in the pre-cooling dehumidifier 10 is as follows:

[0174] Hydrogen enters the precooling pressure vessel 101 through the precooler air inlet valve 1030, flows upward from the hydrogen transfer pipe 1037 set at the top to the dehumidification pressure vessel 102; when the temperature of the hydrogen before entering the pressure vessel 101 is lower than or equal to 5°C, the second heat exchanger 1021 stops working; when the temperature of the hydrogen before entering the pressure vessel 101 is higher than 5°C, the second heat exchanger 1021 starts working; because the surface temperature of the second heat exchanger 1021 is 0.1°C to 5°C, the hydrogen cools down, and part of the water vapor condenses into water droplets and falls to the bottom of the precooling pressure vessel 101; the surface temperature of the first heat exchanger 1011 is set to -80°C to -5°C, the hydrogen rises into this area and touches the surface of the first heat exchanger 1011, the hydrogen cools down to below 0°C, and the water vapor in the hydrogen crystallizes into ice crystals. Due to the action of gravity, part of the ice crystals The ice crystals fall to the bottom of the pre-cooling pressure vessel 101 and melt; hydrogen flows out from the hydrogen transmission pipe 1037 at the top of the pre-cooling pressure vessel 101 and enters the dehumidification pressure vessel 102 along the tangent and obliquely downward, forming a composite motion of circular motion and downward motion along the inner surface of the cylinder of the dehumidification pressure vessel 102. Since the ice crystals are denser than hydrogen, they are concentrated near the container wall under the action of inertia, while there are very few ice crystals near the container axis. Finally, the ice crystals fall to the bottom of the dehumidification pressure vessel 102 and melt; since the inner surfaces of the dehumidification pressure vessel 102, the pre-cooling pressure vessel 101, the hydrogen transmission pipe 1037 and the surfaces of the internal components are coated with anti-ice and snow paint, ice crystals will not adhere to their surfaces; the hydrogen after pre-cooling and dehumidification is input into the user-end gas cylinder from the top pipeline of the dehumidification pressure vessel 102 through the hydrogen supply valve 1033 and the hydrogen filling machine.

[0175] C, please refer to Figure 7 , the drainage method of the pre-cooling dehumidifier 10 is:

[0176] The drainage method of the pre-cooling dehumidifier during the pre-cooling dehumidification process is:

[0177] When the precooler upper liquid level gauge 1018 detects water, the precooler drain valve 1019 is opened to drain the water into the precooler drain tank 1013; the precooler drain tank 1013 maintains a pressure of 0.01 MPa to 10 MPa, and the precooler middle liquid level gauge 1017 and the precooler lower liquid level gauge 1016 detect the water level, and control the switch of the precooler drain valve 1015 to discharge the water along the U-shaped drain pipe, so that the water level is maintained between the precooler middle liquid level gauge 1017 and the precooler lower liquid level gauge 1016, and the water surface is filled with hydrogen;

[0178] The drainage method of the secondary dehumidifier is the same as that of the pre-cooling primary dehumidifier and will not be repeated here.

[0179] Ding, please refer to Figure 1 , the hydrogen transfer pressurization method is as follows:

[0180] The basic method of hydrogen transfer pressurization is that the displacement liquid 4 is driven by the liquid delivery pressurizer 5 to enter the hydrogen storage tank from the bottom or low position of the hydrogen storage tank along the liquid delivery pipeline; when the hydrogen discharge valve of the hydrogen storage tank is closed, the hydrogen pressure of the hydrogen storage tank continuously increases as the liquid level of the displacement liquid 4 rises; when the hydrogen pipeline of the hydrogen storage tank is connected to another hydrogen storage tank, i.e., the target hydrogen storage tank, and the hydrogen storage volume of the target hydrogen storage tank does not change, the pressure of the two hydrogen storage tanks rises simultaneously as the liquid level of the displacement liquid 4 rises, and the hydrogen is also transferred to the target hydrogen storage tank; due to the resistance of the hydrogen pipeline, the pipeline pressure drop is caused, so that the hydrogen pressure of the transfer-out hydrogen storage tank is greater than that of the target hydrogen storage tank during the transfer process;

[0181] When the liquid delivery pressurizer 5 is working, the displacement liquid 4 flows into the pump from the liquid delivery valve 33 in the forward working mode; the displacement liquid 4 flows out of the liquid delivery pressurizer 5 and passes through the liquid delivery valve 33 in the reverse working mode;

[0182] Before the hydrogen transfer pressurization operation, the gas delivery pipeline and the liquid delivery pipeline must be connected first;

[0183] Connecting the gas delivery pipeline:

[0184] This paragraph also needs to refer to Figure 3 ; the gas delivery control valve 85, the hydrogen control valve 12 are closed, the gas pipeline connection joint 82 is connected, the gas pipeline impurity discharge control valve 83 is opened, and the gas delivery control valve 85 to the downstream pipeline is already filled with hydrogen under normal working conditions; the gas pipeline liquid delivery control valve 88 is opened, the displacement liquid 4 enters the gas pipeline inclined pipe 86 and the pipeline connected by the gas pipeline connection joint 82, the liquid level continuously rises, and at the same time the displacement liquid 4 discharges the air in all the spaces it fills; after the liquid level signal is detected by the gas pipeline liquid level gauge 84, the gas pipeline impurity discharge control valve 83 and the gas pipeline liquid delivery control valve 88 are closed; the gas delivery control valve 85, the hydrogen control valve 12, and the hydrogen control valve 22 are opened; at this time, when the hydrogen pressure in the first tank 1 is greater than that in the second tank 2, the hydrogen in the first tank 1 will flow to the second tank 2, and the displacement liquid 4 in the gas pipeline connector 8 will also be input into the second tank 2; when the hydrogen pressure in the first tank 1 is less than that in the second tank 2, the hydrogen in the second tank 2 will flow into the first tank 1, and the displacement liquid 4 in the gas pipeline connector 8 will also be input into the first tank 1; after the displacement liquid 4 in the gas pipeline connector 8 is discharged into the hydrogen storage tank, the hydrogen control valve 22, the hydrogen control valve 12, and the gas delivery control valve 85 are closed, the gas pipeline is connected, and it is waiting for use.

[0185] Connecting the liquid delivery pipeline:

[0186] This paragraph also needs to refer to Figure 2; the infusion tube connecting joint 72 is connected, the infusion valve 31, the infusion valve 33, the infusion valve 39, the infusion valve 34, the infusion valve 35, the infusion tube exhaust control valve 73 are opened, and the remaining valves are closed; the infusion control valve 75 is connected to the infusion pipeline of the displacement liquid storage tank 9, and the displacement liquid 4 is filled; the infusion control valve 75 is opened, the liquid delivery booster 5 is started and runs forward at low speed, the displacement liquid 4 flows into the infusion inclined pipe 76, the infusion tube connecting joint 72 and the connecting pipeline thereof, and the liquid level rises, and the air in all spaces filled with the displacement liquid 4 is discharged; after the liquid level signal is detected by the infusion tube liquid level meter 74, the infusion tube exhaust control valve 73 is closed, the liquid delivery booster 5 is stopped, the infusion valve 31, the infusion valve 33, the infusion valve 34, the infusion valve 39, the infusion valve 35, the infusion valve 39 and the infusion control valve 75 are closed, the infusion pipeline is connected, and waiting for use.

[0187] The hydrogen displacement transfer boosting operation between the first storage tank 1, the second storage tank 2, the displacement liquid storage tank 9 and the user end gas cylinder will be described below in two aspects of hydrogen transfer boosting and displacement liquid 4 transfer after the first storage tank 1 completes hydrogen displacement transfer;

[0188] The first aspect is hydrogen transfer boosting.

[0189] The hydrogen transfer boosting is divided into three categories.

[0190] The first category is hydrogen isobaric transfer.

[0191] The hydrogen pressure of the first storage tank 1 is the same as that of the second storage tank 2, and this method is adopted; the displacement liquid 4 in the second storage tank 2 is used to transfer and deliver the hydrogen in the first storage tank 1 to the second storage tank 2.

[0192] The gas pipeline is opened, the hydrogen control valve 12, the gas control valve 85 and the hydrogen control valve 22 are opened, and the remaining valves are closed.

[0193] The liquid pipeline is opened, the infusion valve 33, the infusion valve 31, the second valve 23, the first valve 13 and the infusion control valve 75 are opened, and the remaining valves are closed.

[0194] The liquid delivery booster 5 is started and runs forward, the displacement liquid 4 in the second storage tank 2 is delivered to the first storage tank 1 in a forward delivery mode, the hydrogen in the first storage tank 1 is transferred to the second storage tank 2, and the hydrogen pressure in the second storage tank 2 does not change; because the hydrogen pressure of the first storage tank 1 is the same as that of the second storage tank 2, the work output by the liquid delivery booster 5 is only the work done to overcome the frictional resistance and the change of liquid gravity potential energy that the displacement liquid 4 faces when flowing in the pipeline, and this hydrogen transfer mode is energy-saving; this mode is an ideal way to unload hydrogen from the pipe bundle vehicle, which not only speeds up the hydrogen unloading speed, but also reduces energy consumption.

[0195] The second category, hydrogen pressure transfer and hydrogen boosting, refers to the simultaneous increase in the pressure of both the hydrogen leaving the hydrogen storage container and the target hydrogen storage container during the transfer process, or the pressurization of a hydrogen storage tank;

[0196] In the first case, the displacement fluid 4 in the displacement fluid storage tank 9 is delivered to the first storage tank 1 through the liquid delivery booster 5, and the hydrogen in the first storage tank 1 is transferred to the second storage tank 2;

[0197] In the gas pipeline, open the hydrogen control valve 12, the gas control valve 85, and the hydrogen control valve 22, and close the remaining valves; if the pressure in the second storage tank 2 is greater than that in the first storage tank 1, the hydrogen in the second storage tank 2 will flow into the first storage tank 1;

[0198] In the infusion line, open the infusion valve 33, infusion valve 31, infusion valve 34, infusion valve 35, infusion valve 39, first valve 13, and infusion control valve 75, and close the remaining valves;

[0199] Start the liquid delivery booster 5 in forward operation, transferring the displacement fluid 4 from the displacement fluid storage tank 9 to the first storage tank 1. This transfers the hydrogen from the first storage tank 1 to the second storage tank 2, simultaneously pressurizing the hydrogen in both tanks. This method can also be used to unload hydrogen from a tube bundle truck. However, the operating pressure of the tube bundle truck's gas cylinders is currently lower than that of the station's hydrogen storage tanks. Therefore, in practice, the pressure differential method is used to unload some hydrogen before unloading using this method. Otherwise, the tube bundle truck's gas cylinders will be overpressurized.

[0200] In the second case, the displacement liquid 4 in the displacement liquid storage tank 9 is delivered to the first storage tank 1 through the liquid delivery booster 5, and the hydrogen in the first storage tank 1 is transferred to the user-end gas cylinder through the pre-cooling dehumidifier 10 and the hydrogenation machine;

[0201] In the gas transmission pipeline, open the hydrogen control valve 12, gas transmission control valve 85, gas outlet valve 27, precooler inlet valve 1030, and hydrogen supply valve 1033; close the remaining valves; when the pressure in the first storage tank 1 is greater than the pressure in the user-end gas cylinder, the hydrogen in the first storage tank 1 flows into the user-end gas cylinder until the pressure is balanced and the flow stops;

[0202] In the infusion line, open the infusion valve 33, infusion valve 31, infusion valve 34, infusion valve 35, infusion valve 39, first valve 13, and infusion control valve 75, and close the remaining valves;

[0203] The liquid delivery booster 5 is activated in forward operation, transferring the displacement fluid 4 from the displacement fluid storage tank 9 to the first storage tank 1. The hydrogen in the first storage tank 1 is then transferred to the user's gas cylinder via the pre-cooling dehumidifier 10 and the hydrogen refueling machine. The hydrogen in both the first storage tank 1 and the user's gas cylinder is pressurized simultaneously. Because the operating pressure of the gas cylinders in the tube bundle vehicle is currently lower than that of the user's high-pressure gas cylinders, this method of hydrogen filling can only partially operate and cannot meet the user's high-pressure requirements. Other methods are needed to continue to provide high-pressure hydrogen to the user.

[0204] In the third case, the replacement fluid 4 in the replacement fluid storage tank 9 is delivered to the second storage tank 2 through the liquid delivery booster 5, and the hydrogen in the second storage tank 2 is delivered to the user-end gas cylinder;

[0205] In the gas transmission pipeline, open the outlet valve 26, the precooler inlet valve 1030, and the hydrogen supply valve 1033; the remaining valves are closed; when the pressure in the second storage tank 2 is greater than the pressure in the user-end gas cylinder, the hydrogen in the second storage tank 2 flows into the user-end gas cylinder until the pressure is balanced and the flow stops;

[0206] In the infusion line, open the infusion valve 33, infusion valve 32, infusion valve 35, and the second valve 23, and close the remaining valves;

[0207] The liquid delivery booster 5 is started to operate in reverse, transferring the displacement fluid 4 from the displacement fluid storage tank 9 to the second storage tank 2. The hydrogen in the second storage tank 2 is then transferred to the user's gas cylinder via the pre-cooling dehumidifier 10 and the hydrogenation machine. The hydrogen in both the second storage tank 2 and the user's gas cylinder is pressurized simultaneously. This method will become the primary method for hydrogen stations to charge users with hydrogen. It can speed up hydrogen charging, reduce energy consumption, and provide all hydrogen in the station's hydrogen storage tanks to users, fully utilizing the station's hydrogen storage equipment and improving the station's equipment utilization rate.

[0208] In the fourth case, the replacement liquid 4 in the first storage tank 1 is delivered to the second storage tank 2 through the liquid delivery booster 5, and the hydrogen in the second storage tank 2 is transferred to the user-end gas cylinder through the pre-cooling dehumidifier 10;

[0209] In the gas transmission pipeline, open the outlet valve 26, the precooler inlet valve 1030, and the hydrogen supply valve 1033; the remaining valves are closed; when the pressure in the second storage tank 2 is greater than the pressure in the user-end gas cylinder, the hydrogen in the second storage tank 2 flows into the user-end gas cylinder until the pressure is balanced and the flow stops;

[0210] In the infusion line, open the infusion valve 31, infusion valve 33, second valve 23, first valve 13, and infusion control valve 75, and close the remaining valves;

[0211] Start the liquid delivery booster 5 to run in reverse, and deliver the replacement liquid 4 in the first storage tank 1 to the second storage tank 2 through the liquid delivery booster 5, and transfer the hydrogen in the second storage tank 2 to the user-end gas cylinder through the pre-cooling dehumidifier 10 and the hydrogenator. The hydrogen in the second storage tank 2 and the user-end gas cylinder is pressurized at the same time; due to the output of the replacement liquid 4 in the first storage tank 1, the hydrogen pressure in the first storage tank 1 is reduced, but the first storage tank 1 reserves hydrogen according to the set requirements, so after the output of the replacement liquid 4 in the first storage tank 1 is completed, its hydrogen pressure can still reach the requirement of not less than 0.01MPa.

[0212] The fifth case, the displacement liquid 4 in the displacement liquid storage tank 9 is delivered to the second storage tank 2 through the liquid delivery booster 5 to increase the hydrogen pressure in the second storage tank 2; sometimes the storage tank pressure needs to be increased, so this operation is performed;

[0213] Gas delivery pipeline, all closed;

[0214] Liquid delivery pipeline, liquid delivery valve 33, liquid delivery valve 32, liquid delivery valve 35, and second valve 23 are opened, and the rest of the valves are closed;

[0215] Start the liquid delivery booster 5 in reverse operation to deliver the displacement liquid 4 in the displacement liquid storage tank 9 to the second storage tank 2 in reverse delivery mode, so that the hydrogen pressure in the second storage tank 2 is increased to the required pressure.

[0216] The third type is hydrogen pressure difference transfer, which refers to the pressure in the hydrogen transfer container is greater than the pressure in the target hydrogen storage container, and the hydrogen is transferred from the hydrogen transfer container to the target hydrogen storage container under the action of the pressure difference, without the need to use displacement liquid 4; but as the hydrogen transfer and delivery pressure difference gradually decreases, the pressure difference eventually reaches zero and reaches equilibrium; if further transfer and pressure increase is needed, displacement liquid 4 can be pushed by the liquid delivery booster 5 for displacement transfer and pressure increase;

[0217] The first case, the hydrogen pressure in the first storage tank 1 is greater than the hydrogen pressure in the second storage tank 2, and the hydrogen in the first storage tank 1 is transferred to the second storage tank 2 through the hydrogen pressure difference;

[0218] Gas delivery pipeline, hydrogen control valve 12, gas delivery control valve 85, and hydrogen control valve 22 are opened, and the rest of the valves are closed.

[0219] The second case, the hydrogen pressure in the first storage tank 1 is greater than the pressure in the user end cylinder, and the hydrogen in the first storage tank 1 is transferred to the user end cylinder through the pre-cooling and dehumidifying device 10 through the hydrogen pressure difference;

[0220] Gas delivery pipeline, hydrogen control valve 12, gas delivery control valve 85, gas outlet valve 27, pre-cooler inlet valve 1030, and hydrogen supply valve 1033 are opened; the rest of the valves are closed.

[0221] The third case, the hydrogen pressure in the second storage tank 2 is greater than the pressure in the user end cylinder, and the hydrogen in the second storage tank 2 is transferred to the user end cylinder through the pre-cooling and dehumidifying device 10 through the hydrogen pressure difference;

[0222] Gas delivery pipeline, gas outlet valve 26, pre-cooler inlet valve 1030, and hydrogen supply valve 1033 are opened; the rest of the valves are closed.

[0223] The second aspect, transfer of the displacement liquid 4 in the first storage tank 1 after hydrogen transfer and pressure increase:

[0224] The first case, the displacement liquid 4 in the first storage tank 1 is transferred to the second storage tank 2;

[0225] Gas pipeline, close all valves;

[0226] In the infusion pipeline, when the pressure of the first storage tank 1 is greater than that of the second storage tank 2, the infusion valve 31, infusion valve 32, infusion valve 34, infusion valve 39, first valve 13, second valve 23, and infusion control valve 75 are opened, and the remaining valves are closed. The pressure difference method is used for transfer until the pressure of the two tanks is balanced; when the pressure of the first storage tank 1 is less than or equal to the pressure of the second storage tank 2, the infusion valve 31, infusion valve 33, first valve 13, second valve 23, and infusion control valve 75 are opened, and the remaining valves are closed. The liquid delivery booster 5 is started and operated in reverse to transfer the replacement fluid 4 in the first storage tank 1 to the second storage tank 2, thereby increasing the pressure of the second storage tank 2.

[0227] In the second case, the replacement fluid 4 in the first storage tank 1 is transferred to the replacement fluid storage tank 9;

[0228] Gas pipeline, close all valves;

[0229] In the infusion pipeline, when the pressure of the first storage tank 1 is greater than that of the replacement fluid storage tank 9, the infusion valve 31, the infusion valve 32, the infusion valve 35, the first valve 13, and the infusion control valve 75 are opened, and the other valves are closed; because a sufficient amount of hydrogen with sufficient pressure is reserved in the first storage tank 1, the pressure of the first storage tank 1 is greater than that of the replacement fluid storage tank 9 at the beginning, and the replacement fluid 4 in the first storage tank 1 will flow into the replacement fluid storage tank 9 due to the pressure difference, and the pressure in the first storage tank 1 will gradually decrease; open the liquid tank exhaust valve 91 of the replacement fluid storage tank 9 to discharge an appropriate amount of hydrogen to avoid Avoid increasing the pressure in the tank; when the pressures of the two tanks are balanced, the replacement fluid 4 stops flowing; when the pressure of the first storage tank 1 is less than or equal to the pressure of the replacement fluid storage tank 9, open the infusion valve 31, infusion valve 33, infusion valve 39, infusion valve 34, infusion valve 35, first valve 13, and infusion control valve 75, and close the remaining valves. Start the liquid delivery booster 5 and run it in reverse to transfer the replacement fluid 4 in the first storage tank 1 to the replacement fluid storage tank 9. At the same time, open the liquid tank exhaust valve 91 of the replacement fluid storage tank 9 to discharge hydrogen to avoid increasing the pressure in the tank.

[0230] The device is also provided with a third storage tank 20, which involves the hydrogen replacement, transfer and pressurization operation between the third storage tank 20 and the first storage tank 1, the second storage tank 2, the replacement liquid storage tank 9 and the user-end gas cylinder. The principle is the same as that described in Class D above, and will not be repeated here;

[0231] The following is the operation of transferring the replacement fluid 4 in the replacement fluid storage tank 9 to the second storage tank 2, and transferring the hydrogen in the second storage tank 2 to the third storage tank 20 for pressurization;

[0232] In the gas pipeline, open hydrogen control valve 22 and hydrogen control valve 202, and close the remaining valves. When the pressure in the second storage tank 2 is greater than that in the third storage tank 20, the hydrogen in the second storage tank 2 flows into the third storage tank 20 due to the pressure difference until the pressures are balanced. When the pressure in the second storage tank 2 is less than that in the third storage tank 20, the hydrogen in the third storage tank 20 flows into the second storage tank 2 until the pressures are balanced.

[0233] In the infusion pipeline, when the pressure of the second storage tank 2 is equal to that of the third storage tank 20, open the infusion valve 35, infusion valve 32, infusion valve 33, and second valve 23, and close the remaining valves;

[0234] Start the liquid delivery booster 5 in reverse operation to deliver the replacement fluid 4 in the replacement fluid storage tank 9 to the second storage tank 2. The hydrogen pressure in the second storage tank 2 and the third storage tank 20 is simultaneously increased, and the hydrogen in the second storage tank 2 is transferred to the third storage tank 20.

[0235] In short, during the specific hydrogen transfer and pressurization process at the hydrogen refueling station, operations must be performed according to the specific conditions of the hydrogen storage tank. In order to improve efficiency, the above operations can be combined. The initial stage of the hydrogen transfer operation adopts the pressure difference method. When the pressure difference is too low and the transfer speed decreases, the displacement transfer and pressurization methods are adopted.

[0236] E. To avoid freezing during low-temperature winter use, take the following measures:

[0237] In the first method, the replacement fluid 4 is an antifreeze solution;

[0238] The second method is to cover the tank and pipeline with insulation and use water at 5°C to 30°C;

[0239] The third method uses water at 5°C to 30°C. Except for the water used in the hydrogen transfer, transportation and pressurization process, water is avoided from being stored in the hydrogen storage tank, and the remaining water is stored in the displacement fluid storage tank 9; in this way, only the displacement fluid storage tank 9 and the pipeline are covered with the insulation layer.

[0240] In the present invention, the first storage tank 1 is the high-pressure hydrogen cylinder of the tube bundle truck that transports hydrogen to the hydrogen refueling station. The second storage tank 2 and the third storage tank 20 are the high-pressure hydrogen cylinders installed in the hydrogen refueling station. In actual situation, there will be several high-pressure hydrogen cylinders installed in the hydrogen refueling station, but the basic operating principles are the same.

Claims

1. A hydrogen transfer, boosting and dehumidifying device for a hydrogen refueling station, comprising a first storage tank (1), a second storage tank (2), a displacement liquid storage tank (9), a liquid delivery booster (5), a liquid infusion valve (31), a liquid infusion valve (32), a liquid infusion valve (33), a liquid infusion valve (34), a liquid infusion valve (35), a liquid infusion valve (36), a liquid infusion valve (37), a liquid infusion valve (38), and a liquid infusion valve (39); the two ports of the liquid delivery booster (5) and each liquid infusion valve are respectively an R port and an L port; the liquid delivery booster (5) has the functions of performing forward and reverse delivery, boosting and flow regulation on the liquid, and the pressure difference between the outlet and the inlet is the boosted pressure; Its characteristics are: The hydrogen transfer, pressurizing and dehumidifying device for a hydrogen refueling station comprises a liquid delivery pipeline connector (7) and a gas delivery pipeline connector (8), wherein the two ports of the two connectors are respectively an R port and an L port; the hydrogen transfer, pressurizing and dehumidifying device for a hydrogen refueling station is further provided with a dehumidifier (6); The first storage tank (1), the second storage tank (2) and the displacement fluid storage tank (9) are all pressure vessels, the middle sections of which are all cylindrical, with curved end caps at both ends. The working pressures of the first storage tank (1) and the second storage tank (2) are both 0.01 MPa to 500 MPa, and the working pressure of the displacement fluid storage tank (9) is 0.01 MPa to 20 MPa. The angle between the axis of the first storage tank (1) and the horizontal plane is δ, and the range of δ is 0° to 90°. The two ends are respectively end B and end C. When δ is greater than 0°, end B is higher than end C. The end B of the first storage tank (1) is provided with a hydrogen pipeline communicating with the outside of the tank, and a first pressure detector (11) and a hydrogen control valve (12) are provided. The end C of the first storage tank (1) is provided with a liquid pipeline communicating with the outside of the tank, and a first valve (13) is provided on the outer section of the liquid pipeline. The first storage tank (1) stores hydrogen to be transferred out. The angle between the axis of the second storage tank (2) and the horizontal plane is β, and the range of β is 0° to 90°. The two ends are respectively D end and E end. When β is greater than 0°, the D end is higher than the E end. The D end of the second storage tank (2) is provided with a hydrogen pipeline communicating with the outside of the tank, and is provided with a second pressure detector (21), a hydrogen control valve (22) and an outlet valve (26). The E end of the second storage tank (2) is provided with a liquid pipeline communicating with the outside of the tank, and the liquid pipeline is provided with a first two valves (23); the other end of the second valve (23) is connected to the R port of the infusion valve (33) and the L port of the infusion valve (39); a replacement fluid (4) is provided in the second storage tank (2), and the replacement fluid (4) is a liquid; hydrogen is stored above the liquid level of the replacement fluid (4), and the volume of the replacement fluid (4) accounts for 0% to 99% of the internal volume of the second storage tank (2); the hydrogen pressure in the first storage tank (1) and the second storage tank (2) is always greater than 0.01 MPa; The replacement fluid storage tank (9) is a storage tank for storing the replacement fluid (4), and the space above the liquid level of the replacement fluid (4) is provided with hydrogen; a liquid tank exhaust valve (91) and a liquid tank air inlet valve (92) are provided on the top of the replacement fluid storage tank (9), a liquid tank level detector (93) is provided on the outer wall of the bottom of the replacement fluid storage tank (9), and an infusion pipeline is also provided at the bottom, the pipeline being connected to the R port of the infusion valve (35) and the L port of the infusion valve (36); the hydrogen pressure in the replacement fluid storage tank (9) is always greater than 0.01 MPa; The L port of the infusion line connector (7) is connected to the first valve (13), and the R port of the other end is connected to the L port of the infusion valve (31), the R port of the infusion valve (31) is connected to the L port of the liquid delivery booster (5) and the L port of the infusion valve (32), the R port of the liquid delivery booster (5) is connected to the L port of the infusion valve (33), the R port of the infusion valve (32) is connected to the L port of the infusion valve (35) and the R port of the infusion valve (34), and the R port of the infusion valve (39) is connected to the L port of the infusion valve (34); The infusion line connector (7) comprises an infusion line connection joint (72), an infusion line control valve (75), an infusion line exhaust control valve (73), an infusion line level gauge (74) and a line; the L port of the infusion line connector (7) is internally connected to the infusion line connection joint (72), and the R port of the infusion line connector (7) is internally connected to the infusion line control valve (75); the other end of the infusion line connection joint (72) is connected to the infusion oblique tube (76), and the other end of the infusion oblique tube (76) is connected to two components, one of which is connected upward to the infusion line exhaust control valve (73). ), the other is connected to the infusion control valve (75) obliquely downward at an angle of β5 with the horizontal plane, and the range of β5 is 1° to 70°; the axis of the infusion inclined tube (76), the infusion tube connecting joint (72) and the pipeline connected to the infusion tube connecting joint (72) and the first valve (13) are at an angle of β1 with the horizontal plane, and the range of β1 is 20° to 90°, and the position of the infusion tube connecting joint (72) is higher than the first valve (13); the other end of the pipeline of the infusion tube exhaust control valve (73) is provided with an infusion tube level gauge (74) and a pipeline connected to the atmosphere; The gas pipeline connector (8) comprises a gas pipeline connection joint (82), a gas pipeline exhaust control valve (83), a gas pipeline control valve (85), a gas pipeline liquid infusion control valve (88), a gas pipeline liquid level gauge (84) and a pipeline; the L port of the gas pipeline connector (8) is connected to the hydrogen control valve (12), and the other end R port is connected to the hydrogen control valve (22); The L-port end of the gas pipeline connector (8) is internally connected to the gas pipeline connection joint (82), and the R-port end of the other end of the gas pipeline connector (8) is internally connected to the gas control valve (85); the other end of the gas pipeline connection joint (82) is connected to the gas inclined pipe (86) and the gas pipeline infusion control valve (88); the other end of the gas inclined pipe (86) is connected to two components, one of which is connected upward to the gas pipeline exhaust control valve (83), and the other is connected obliquely downward to the gas control valve (85) at an angle of β6 with the horizontal plane, and the range of β6 is 1° to 70°; the gas pipeline is connected to the gas control valve (85) at an angle of β6 with the horizontal plane, and the range of β6 is 1° to 70°. The angle between the axis of the inclined tube (86), the gas pipe connecting joint (82), and the pipeline connected to the gas pipe connecting joint (82) and the hydrogen control valve (12) and the horizontal plane is β2, and the range of β2 is 20° to 90°, and the position of the gas pipe connecting joint (82) is higher than the hydrogen control valve (12); the other end of the gas pipe exhaust control valve (83) is provided with a gas pipe level gauge (84) and a pipeline connected to the atmosphere; the other end of the gas pipe liquid infusion control valve (88) is connected to the pipeline with a replacement fluid (4), and the pressure of the replacement fluid is 0.001MPa to 0.2MPa.

2. The hydrogen transfer, pressurization and dehumidification device for a hydrogen refueling station according to claim 1 is characterized in that: The hydrogen transfer, pressurizing and dehumidifying device for a hydrogen refueling station comprises a third storage tank (20); the third storage tank (20) is a pressure vessel, the middle section of which is cylindrical, and both ends are provided with curved heads, and the working pressure is 0.01 MPa to 500 MPa; The angle between the axis of the third storage tank (20) and the horizontal plane is β4, and the range of β4 is 0° to 90°. The two ends are respectively D3 end and E3 end. When β4 is greater than 0°, D3 end is higher than E3 end. The D3 end of the third storage tank (20) is provided with a hydrogen pipeline communicating with the outside of the tank, and is provided with a third pressure detector (201), a hydrogen control valve (202) and an outlet valve (206). The E3 end of the third storage tank (20) is provided with a liquid pipeline communicating with the outside of the tank. The liquid pipeline is provided with a third valve (203) at the outer section of the liquid pipeline tank; the other end of the third valve (203) is connected to the R port of the infusion valve (39) and the L port of the infusion valve (34); the third storage tank (20) is provided with a replacement fluid (4), and hydrogen is stored above the liquid level of the replacement fluid (4), and the volume of the replacement fluid (4) accounts for 0% to 99% of the internal volume of the third storage tank (20); the hydrogen pressure in the third storage tank (20) is always greater than 0.01 MPa; The hydrogen control valve (202) of the third storage tank (20) and the hydrogen control valve (22) of the second storage tank (2) are both connected to the R port of the gas pipeline connector (8) and the L port of the gas outlet valve (27); the gas outlet valve (206) of the third storage tank (20) and the gas outlet valve (26) of the second storage tank (2) are both connected to the R port of the gas outlet valve (27).

3. The hydrogen transfer, pressurization and dehumidification device for a hydrogen refueling station according to claim 2, characterized in that: The outlet positions of the hydrogen pipelines communicating with the outside of the tanks at the B end of the first storage tank (1), the D end of the second storage tank (2), and the D3 end of the third storage tank (20) are all arranged at the highest point of the end; the outlet positions of the liquid pipelines communicating with the outside of the tanks at the C end of the first storage tank (1), the E end of the second storage tank (2), and the E3 end of the third storage tank (20) are all arranged at the lowest point of the end.

4. The hydrogen transfer, pressurizing and dehumidifying device for a hydrogen refueling station according to claim 3 is characterized in that: The first storage tank (1), the second storage tank (2), and the third storage tank (20) are respectively provided with an exhaust chamber (18a), an exhaust chamber (18b), and an exhaust chamber (18c); the exhaust chamber (18a), the exhaust chamber (18b), and the exhaust chamber (18c) are respectively located at the highest points of the B end, the D end, and the D3 end; the exhaust chamber (18a), the exhaust chamber (18b), and the exhaust chamber (18c) are all rotating bodies; the hydrogen pipeline outlets of the B end, the D end, and the D3 end are respectively provided at the highest points of the exhaust chamber (18a), the exhaust chamber (18b), and the exhaust chamber (18c) The first storage tank (1), the second storage tank (2), and the third storage tank (20) are respectively provided with a drainage cavity (19a), a drainage cavity (19b), and a drainage cavity (19c); the drainage cavity (19a), the drainage cavity (19b), and the drainage cavity (19c) are respectively located at the lowest points of the C end, the E end, and the E3 end; the drainage cavity (19a), the drainage cavity (19b), and the drainage cavity (19c) are all rotating bodies; the liquid pipeline outlets of the C end, the E end, and the E3 end are respectively provided at the lowest points of the drainage cavity (19a), the drainage cavity (19b), and the drainage cavity (19c).

5. The hydrogen transfer, pressurization and dehumidification device for a hydrogen refueling station according to claim 4 is characterized in that: The impurity remover (6) has an operating pressure of 0.005 MPa to 0.5 MPa absolute pressure, wherein the middle section is cylindrical in shape, and both ends are provided with curved heads; the top of the impurity remover (6) is provided with an impurity remover exhaust valve B (67) and an impurity remover air intake control valve (66), and the other end of the impurity remover exhaust valve B (67) is connected to the impurity remover exhaust vacuum pump (68); the highest point of the top of the impurity remover (6) is provided with an impurity remover exhaust valve A (60); the impurity remover air intake control valve (66) is connected to a hydrogen pipeline, and the pressure thereof is 0.001 MPa to 0.03 MPa; The bottom of the impurity remover (6) is provided with a discharge pipeline and a connected impurity remover liquid outlet control valve (62), an inlet pipeline and a connected impurity remover liquid inlet control valve (63); the impurity remover liquid inlet control valve (63) is connected to the replacement liquid pipeline to be removed, and the pressure of the replacement liquid to be removed in the pipeline is 0.05MPa to 0.5MPa; the other end of the impurity remover liquid outlet control valve (62) is connected to the inlet of the impurity remover liquid outlet pump (61) and the R port of the infusion valve (38), and the impurity remover liquid outlet pump (61) has a suction lift greater than 5m; the outlet of the impurity remover liquid outlet pump (61) is connected to the R port of the infusion valve (36) and the R port of the infusion valve (37); the impurity remover liquid level detector (69) is provided on the outer wall of the bottom of the impurity remover (6); A de-duster liquid spray control valve (64) is provided on the upper portion of the de-duster (6), and a de-duster liquid inlet nozzle (65) is provided on the upper portion of the interior of the de-duster (6), and the two are connected via a pipeline passing through the tank wall of the de-duster (6); the de-duster liquid spray control valve (64) is connected to a pipeline of a replacement fluid to be de-dustered, and the pressure of the replacement fluid to be de-dustered is 0.05 MPa to 1 MPa, and the temperature is 5° C. to 98° C.; the de-duster liquid inlet nozzle (65) sprays the replacement fluid to be de-dustered into atomized form within the de-duster (6).

6. The hydrogen transfer, pressurization and dehumidification device for a hydrogen refueling station according to claim 5, characterized in that: The replacement fluid (4) is water.

7. The hydrogen transfer, pressurizing and dehumidifying device for a hydrogen refueling station according to claim 6, characterized in that: The hydrogen transfer, pressurizing and dehumidifying device for a hydrogen refueling station is provided with a precooling dehumidifier (10), and the precooling dehumidifier (10) is composed of a precooling primary dehumidifier and a secondary dehumidifier; The precooling primary dehumidifier comprises a precooling pressure vessel (101); a first heat exchanger (1011) is provided in the precooling pressure vessel (101), and the surface temperature thereof is -80°C to -5°C; the precooling pressure vessel (101) is further provided with a hydrogen inlet pipeline and a precooler air inlet valve (1030) connected to the pipeline, and the hydrogen inlet pipeline port is located below the first heat exchanger (1011); a heat-insulating layer (1012) for keeping cold is provided on the outer surface of the precooling pressure vessel (101); a precooler temperature detector (1031) is provided on the top of the precooling pressure vessel (101); an anti-ice and snow coating is provided on the surface of the first heat exchanger (1011) and the inner surface of the precooling pressure vessel (101); A drainage pipe is provided at the bottom of the precooling pressure vessel (101), a precooler upper liquid level gauge (1018) is provided on the drainage pipe, a precooler drainage valve (1019) is provided on the drainage pipe below the precooler upper liquid level gauge (1018), and a precooler drainage tank (1013) is connected and provided below the precooler drainage valve (1019); the precooler drainage tank (1013) is a pressure vessel, a pressure detector (1032) and a drainage tank air inlet valve (1014) are provided on the top of the precooler drainage tank; the drainage tank inlet valve (1014) is provided on the drainage tank inlet valve (1014) and the precooler drainage tank inlet valve (1019) are provided on the precooler pressure vessel (1013); the precooler drainage tank (1013) is a pressure vessel, a pressure detector (1032) and a drainage tank air inlet valve (1014) are provided on the top of the precooler pressure vessel (1013); the precooler drainage tank inlet valve (1014) is provided on the precooler pressure vessel (1013); the precooler drainage tank inlet valve (1014) is provided on the precooler pressure vessel (1013); the precooler drainage tank inlet valve (1019 ... The pipeline connected to the gas valve (1014) contains hydrogen gas at a pressure of 0.01 MPa to 5 MPa; a precooler middle liquid level gauge (1017) and a precooler lower liquid level gauge (1016) are provided on the middle outer wall and the lower outer wall of the precooler drainage tank (1013); a precooler drain outlet valve (1015) is provided at the bottom end of the precooler drainage tank (1013); the precooler drain outlet valve (1015) is connected to a U-shaped drainage pipeline, the outlet of which is upward, and a drainage buffer (1034) is provided at the outlet; The secondary dehumidifier comprises a dehumidification pressure vessel (102), the top of the dehumidification pressure vessel (102) is a hemispherical body, a hydrogen outlet pipeline and a connected hydrogen supply valve (1033) are arranged at the top of the hemispherical body, a cylinder is arranged below the hemispherical body, and the bottom is a curved head; a hydrogen transmission pipe (1037) is arranged at the top of the precooling pressure vessel (101), the hydrogen transmission pipe (1037) is connected to the dehumidification pressure vessel (102), the connection point between the hydrogen transmission pipe (1037) and the dehumidification pressure vessel (102) is located at the connection part of the spherical body and the cylinder, the direction of the pipeline at the connection point is horizontal and downward, and the angle between the pipeline and the horizontal plane is β3, and the range of β3 is 0° to 45°, and the direction of the pipeline at the connection point is tangent to the inner surface of the cylinder of the dehumidification pressure vessel (102); the inner surfaces of the dehumidification pressure vessel (102) and the hydrogen transmission pipe (1037) are provided with an anti-ice and snow coating; A drainage pipe is provided at the bottom of the dehumidification pressure vessel (102), a dehumidification upper liquid level gauge (1028) is provided on the drainage pipe, a dehumidification drainage valve (1029) is provided below the dehumidification upper liquid level gauge (1028), and a dehumidification drainage tank (1023) is connected and provided below the dehumidification drainage valve (1029); the dehumidification drainage tank (1023) is a pressure vessel, a pressure detector (1036) and a dehumidification drainage tank air inlet valve (1024) are provided on the top of the dehumidification drainage tank (1023); the pipeline connected to the dehumidification drainage tank air inlet valve (1024) is a hydrogen pipeline, and the pressure is 0.01MPa to 5MPa; a dehumidification middle level gauge (1027) and a dehumidification lower level gauge (1026) are provided on the middle outer wall and the lower outer wall of the dehumidification drainage tank (1023); a dehumidification drainage outlet valve (1025) is provided at the bottom end of the dehumidification drainage tank (1023); a drainage pipeline connected to the dehumidification drainage outlet valve (1025) is provided as a U-shaped drainage pipeline, with an outlet facing upward, and a dehumidification drainage buffer (1035) is provided at the outlet; a secondary dehumidifier insulation layer (1022) for keeping cold is provided on the upper outer surface of the dehumidification pressure vessel (102); The R port of the gas outlet valve (27) is connected to the precooler gas inlet valve (1030); the hydrogen supply valve (1033) is connected to the user-end gas cylinder through a pipeline and a hydrogenation machine; the outer surfaces of the second storage tank (2), the third storage tank (20), the displacement liquid storage tank (9), and the liquid infusion pipeline are all provided with a thermal insulation layer; the outer surfaces of the hydrogen transmission pipe (1037) and the hydrogen transmission pipeline downstream of the dehumidification pressure vessel (102) are all provided with a cold insulation layer.

8. The hydrogen transfer, pressurizing and dehumidifying device for a hydrogen refueling station according to claim 7, characterized in that: A second heat exchanger (1021) is also provided in the pre-cooling pressure vessel (101). The second heat exchanger (1021) is provided in a space above the hydrogen inlet pipe junction and below the first heat exchanger (1011), and its surface temperature is 0.1°C to 5°C; an anti-ice and snow coating is provided on the surface of the second heat exchanger (1021).

9. The hydrogen transfer, pressurization and dehumidification device for a hydrogen refueling station according to claim 5, characterized in that: The replacement fluid (4) is an ionic liquid.

10. The hydrogen transfer, pressurizing and dehumidifying device for a hydrogen refueling station according to claim 5, characterized in that: The replacement fluid (4) is an antifreeze solution.

11. A method for using a hydrogen transfer, pressurizing and dehumidifying device for a hydrogen refueling station, using the hydrogen transfer, pressurizing and dehumidifying device for a hydrogen refueling station as claimed in claim 8, characterized in that: A, the impurity removal step of the impurity remover (6) is: The first step is to remove the air in the impurity remover (6): Open the impurity remover exhaust valve A (60) and close other valves; The impurity remover liquid inlet control valve (63) is opened, and the replacement fluid to be removed flows into the impurity remover (6); as the liquid level rises, the air in the impurity remover (6) is discharged from the impurity remover exhaust valve A (60); when the impurity remover exhaust valve A (60) discharges the replacement fluid to be removed, the impurity remover (6) is completely filled with the replacement fluid to be removed, and the air has been exhausted, and the impurity remover liquid inlet control valve (63) and the impurity remover exhaust valve A (60) are closed; The second step is to form a hydrogen cavity and negative pressure: Open the infusion valve (38), the impurity remover liquid outlet control valve (62), and the impurity remover air inlet control valve (66), and close the other valves; discharge the replacement fluid to be removed, and simultaneously introduce hydrogen; when the liquid level drops by 5% to 50%, first close the impurity remover air inlet control valve (66), then close the infusion valve (38), open the infusion valve (37), and start the impurity remover liquid outlet pump (61) to extract the liquid; The third step is to remove impurities: When the liquid level drops by 70% to 99%, the impurity remover spray control valve (64) is opened, and the replacement fluid to be removed is sprayed into the impurity remover (6) through the impurity remover liquid inlet nozzle (65) and atomized, and the pressure in the impurity remover (6) is controlled to an absolute pressure of 0.005 MPa to an absolute pressure of 0.15 MPa; the gases other than hydrogen dissolved in the replacement fluid to be removed are fully separated; the infusion valve (37) is closed and the infusion valve (36) is opened, and the replacement fluid (4) after impurity removal is input into the replacement fluid storage tank (9); The fourth step is to reduce the concentration of hydrogen impurities: When the hydrogen gas containing impurities in the impurity remover (6) is to be removed, the impurity remover exhaust valve B (67) is opened and the impurity remover exhaust vacuum pump (68) is started to discharge the hydrogen gas with a high impurity concentration, and at the same time, the impurity remover air inlet control valve (66) is opened to introduce pure hydrogen gas; B. The pre-cooling and dehumidifying process of the pre-cooling dehumidifier (10) is as follows: The hydrogen enters the precooling pressure vessel (101) through the precooler air inlet valve (1030), flows upwards and flows from the hydrogen delivery pipe (1037) provided at the top to the dehumidification pressure vessel (102); when the temperature of the hydrogen before entering the precooling pressure vessel (101) is lower than or equal to 5°C, the second heat exchanger (1021) stops working; when the temperature of the hydrogen before entering the precooling pressure vessel (101) is higher than 5°C, the second heat exchanger (1021) starts working; because the surface temperature of the second heat exchanger (1021) is 0.1°C to 5°C, the hydrogen cools down, and part of the water vapor condenses into water droplets and falls to the bottom of the precooling pressure vessel (101); the surface temperature of the first heat exchanger (1011) is set to -80°C to -5°C, the hydrogen rises into this area and touches the surface of the first heat exchanger (1011), the hydrogen cools down to below 0°C, and the water vapor in the hydrogen crystallizes into ice crystals. Due to the action of gravity, the hydrogen cools down and the water vapor in the hydrogen crystallizes into ice crystals. Part of the ice crystals falls to the bottom of the pre-cooling pressure vessel (101); hydrogen flows out from the hydrogen delivery pipe (1037) at the top of the pre-cooling pressure vessel (101) and enters the dehumidification pressure vessel (102) along a tangent and obliquely downward, forming a composite motion of circular motion and downward motion along the inner surface of the cylinder of the dehumidification pressure vessel (102); since the density of ice crystals is greater than that of hydrogen, the ice crystals are concentrated near the container wall under the action of inertia, while there are very few ice crystals near the container axis, and finally fall to the bottom of the dehumidification pressure vessel (102) and melt; since the inner surfaces of the dehumidification pressure vessel (102), the pre-cooling pressure vessel (101), the hydrogen delivery pipe (1037) and the surfaces of the inner components are coated with anti-ice and snow coating, ice crystals will not adhere to their surfaces; the pre-cooled and dehumidified hydrogen is input into the user-end gas cylinder from the top pipeline of the dehumidification pressure vessel (102) through the hydrogen supply valve (1033) and the hydrogen filling machine; C. The drainage method of the pre-cooling dehumidifier (10) is: The drainage method of the pre-cooling dehumidifier during the pre-cooling dehumidification process is: When the precooler upper liquid level gauge (1018) detects water, the precooler drain valve (1019) is opened to drain the water into the precooler drain tank (1013); the precooler drain tank (1013) maintains a pressure of 0.01 MPa to 10 MPa, and controls the switch of the precooler drain valve (1015) to drain the water along the U-shaped drain pipe by detecting the water level through the precooler middle liquid level gauge (1017) and the precooler lower liquid level gauge (1016), so that the water level is kept between the precooler middle liquid level gauge (1017) and the precooler lower liquid level gauge (1016), and the water surface is filled with hydrogen; The drainage method of the secondary dehumidifier is the same as that of the pre-cooling primary dehumidifier and will not be repeated here; D. The hydrogen transfer pressurization method is as follows: The basic method of hydrogen transfer and pressurization is that the displacement fluid (4) enters the hydrogen storage tank from the bottom of the hydrogen storage tank along the liquid delivery pipeline under the drive of the liquid delivery booster (5); when the hydrogen discharge valve of the hydrogen storage tank is closed, as the liquid level of the displacement fluid (4) rises, the hydrogen pressure of the hydrogen storage tank continues to increase; when the hydrogen pipeline of the hydrogen storage tank is connected to another hydrogen storage tank, i.e., the target hydrogen storage tank, and the hydrogen storage volume of the target hydrogen storage tank does not change, as the liquid level of the displacement fluid (4) rises, the pressure of the two hydrogen storage tanks rises at the same time, and the hydrogen is also transferred to the target hydrogen storage tank; due to the resistance of the hydrogen pipeline, the pipeline pressure drops, so during the transfer process, the hydrogen pressure of the hydrogen storage tank transferred out is greater than the pressure of the target hydrogen storage tank; When the liquid delivery booster (5) is working, the replacement fluid (4) flows into the pump through the infusion valve (33) in a forward working mode; the replacement fluid (4) flows out of the liquid delivery booster (5) and passes through the infusion valve (33) in a reverse working mode; Before hydrogen transfer and pressurization operation, the gas pipeline and liquid pipeline must be connected first; Connect the gas pipeline: Close the gas supply control valve (85) and the hydrogen control valve (12), connect the gas supply pipe connector (82), open the gas supply pipe exhaust control valve (83), and under normal working conditions, the gas supply control valve (85) to the downstream pipeline is already filled with hydrogen; open the gas supply pipe infusion control valve (88), and the replacement fluid (4) enters the pipeline connected to the gas supply inclined pipe (86) and the gas supply pipe connector (82), and the liquid level continues to rise. At the same time, the replacement fluid (4) discharges the air in all spaces it fills; after the gas supply pipe level meter (84) detects the liquid level signal, close the gas supply pipe exhaust control valve (83) and the gas supply pipe infusion control valve (88); open the gas supply control valve (85), the hydrogen control valve (12), and the hydrogen control valve (22 ); at this time, when the hydrogen pressure in the first storage tank (1) is greater than the pressure in the second storage tank (2), the hydrogen in the first storage tank (1) will flow to the second storage tank (2), and the replacement fluid (4) in the gas pipeline connector (8) will be input into the second storage tank (2); and when the hydrogen pressure in the first storage tank (1) is less than the pressure in the second storage tank (2), the hydrogen in the second storage tank (2) will flow into the first storage tank (1), and the replacement fluid (4) in the gas pipeline connector (8) will be input into the first storage tank (1); after the replacement fluid (4) in the gas pipeline connector (8) is discharged into the hydrogen storage tank, the hydrogen control valve (22), the hydrogen control valve (12), and the gas control valve (85) are closed, and the gas pipeline is connected and ready for use; Connect the infusion line: Connect the infusion tube connector (72), open the infusion valve (31), infusion valve (33), infusion valve (34), infusion valve (39), infusion valve (35), and infusion tube exhaust control valve (73), and close the remaining valves; connect the infusion line from the infusion control valve (75) to the replacement fluid storage tank (9), open the infusion control valve (75), and simultaneously start the liquid delivery booster (5) and run it in the forward direction, so that the replacement fluid (4) flows into the infusion inclined tube (76), the infusion tube (77), and the replacement fluid (4) flowing into the infusion inclined tube (76), the infusion tube (78). Connect the joint (72) and its connecting pipeline, the liquid level continues to rise, and at the same time, the air in all spaces filled with the replacement fluid (4) is discharged; after the infusion tube level meter (74) detects the liquid level signal, the infusion tube exhaust control valve (73) is turned off, the liquid delivery booster (5) is stopped, and the infusion valve (31), infusion valve (33), infusion valve (34), infusion valve (35), infusion valve (39), and infusion control valve (75) are closed. The infusion pipeline is connected and ready for use; The following is a description of the hydrogen replacement, transfer, and pressurization operation between the first storage tank (1), the second storage tank (2), the replacement liquid storage tank (9), and the user-side gas cylinder, which is divided into two aspects: hydrogen transfer and pressurization; and the transfer of the replacement liquid (4) in the first storage tank (1) after the hydrogen replacement and transfer is completed. First, hydrogen transfer pressurization: Hydrogen transfer boosting is divided into three categories: The first type, hydrogen isobaric transfer: The hydrogen pressure in the first storage tank (1) and the second storage tank (2) is the same, and this method is used; the hydrogen in the first storage tank (1) is transferred to the second storage tank (2) using the replacement fluid (4) in the second storage tank (2); In the gas transmission pipeline, open the hydrogen control valve (12), the gas transmission control valve (85), and the hydrogen control valve (22), and close the remaining valves; In the infusion line, open the infusion valve (33), the infusion valve (31), the second valve (23), the first valve (13), and the infusion control valve (75), and close the remaining valves; The liquid delivery booster (5) is started to run in the forward direction, and the replacement fluid (4) in the second storage tank (2) is delivered to the first storage tank (1) in a forward delivery manner, so that the hydrogen in the first storage tank (1) is transferred to the second storage tank (2), and the hydrogen pressure in the second storage tank (2) does not change; because the hydrogen pressure in the first storage tank (1) is the same as the hydrogen pressure in the second storage tank (2), the work output by the liquid delivery booster (5) is only the work done to overcome the friction resistance encountered by the replacement fluid (4) when flowing in the pipeline and the change in the liquid gravity potential energy encountered, and this hydrogen transfer method is energy-saving; The second category, hydrogen pressure transfer and hydrogen boosting, refers to the simultaneous increase in the pressure of both the hydrogen leaving the hydrogen storage container and the target hydrogen storage container during the transfer process, or the pressurization of a hydrogen storage tank; In the first case, the displacement fluid (4) in the displacement fluid storage tank (9) is transported to the first storage tank (1) through the liquid delivery booster (5), and the hydrogen in the first storage tank (1) is transferred to the second storage tank (2); In the gas transmission pipeline, the hydrogen control valve (12), the gas transmission control valve (85), and the hydrogen control valve (22) are opened, and the remaining valves are closed; if the pressure in the second storage tank (2) is greater than that in the first storage tank (1), the hydrogen in the second storage tank (2) will flow into the first storage tank (1); In the infusion line, open the infusion valve (33), infusion valve (31), infusion valve (34), infusion valve (35), infusion valve (39), first valve (13), and infusion control valve (75), and close the remaining valves; The liquid delivery booster (5) is started to run forward, and the displacement fluid (4) in the displacement fluid storage tank (9) is delivered to the first storage tank (1), so that the hydrogen in the first storage tank (1) is transferred and delivered to the second storage tank (2), and the hydrogen in the two storage tanks is pressurized at the same time; In the second case, the displacement fluid (4) in the displacement fluid storage tank (9) is transported to the first storage tank (1) through the liquid delivery booster (5), and the hydrogen in the first storage tank (1) is transferred to the user-end gas cylinder through the pre-cooling dehumidifier (10) and the hydrogenation machine; The gas transmission pipeline opens the hydrogen control valve (12), the gas transmission control valve (85), the gas outlet valve (27), the precooler gas inlet valve (1030), and the hydrogen supply valve (1033); the remaining valves are closed; when the pressure in the first storage tank (1) is greater than the pressure in the user-end gas cylinder, the hydrogen in the first storage tank (1) flows into the user-end gas cylinder until the pressure is balanced and the flow stops; In the infusion line, open the infusion valve (33), infusion valve (31), infusion valve (34), infusion valve (35), infusion valve (39), first valve (13), and infusion control valve (75), and close the remaining valves; The liquid delivery booster (5) is started to run forward, and the displacement fluid (4) in the displacement fluid storage tank (9) is delivered to the first storage tank (1), so that the hydrogen in the first storage tank (1) is delivered to the user-end gas cylinder through the pre-cooling dehumidifier (10) and the hydrogen filling machine, and the hydrogen pressure of the first storage tank (1) and the hydrogen pressure of the user-end gas cylinder are simultaneously increased; In the third case, the replacement fluid (4) in the replacement fluid storage tank (9) is transported to the second storage tank (2) through the liquid delivery booster (5), and the hydrogen in the second storage tank (2) is transported to the user-end gas cylinder; The gas pipeline opens the gas outlet valve (26), the precooler gas inlet valve (1030), and the hydrogen supply valve (1033); the remaining valves are closed; when the pressure in the second storage tank (2) is greater than the pressure in the user-end gas cylinder, the hydrogen in the second storage tank (2) flows into the user-end gas cylinder until the pressure is balanced and the flow stops; In the infusion line, open the infusion valve (33), infusion valve (32), infusion valve (35), and the second valve (23), and close the remaining valves; The liquid delivery booster (5) is started to run in reverse, and the replacement liquid (4) in the replacement liquid storage tank (9) is delivered to the second storage tank (2), so that the hydrogen in the second storage tank (2) is transferred through the pre-cooling dehumidifier (10) and the hydrogenation machine and delivered to the user-end gas cylinder, and the hydrogen pressure of the second storage tank (2) and the hydrogen pressure of the user-end gas cylinder are simultaneously increased; In the fourth case, the replacement liquid (4) in the first storage tank (1) is transported to the second storage tank (2) through the liquid delivery booster (5), and the hydrogen in the second storage tank (2) is transferred to the user-end gas cylinder through the pre-cooling dehumidifier (10); The gas pipeline opens the gas outlet valve (26), the precooler gas inlet valve (1030), and the hydrogen supply valve (1033); the remaining valves are closed; when the pressure in the second storage tank (2) is greater than the pressure in the user-end gas cylinder, the hydrogen in the second storage tank (2) flows into the user-end gas cylinder until the pressure is balanced and the flow stops; In the infusion line, open the infusion valve (31), the infusion valve (33), the second valve (23), the first valve (13), and the infusion control valve (75), and close the remaining valves; The liquid delivery booster (5) is started to run in reverse, and the replacement liquid (4) in the first storage tank (1) is delivered to the second storage tank (2) through the liquid delivery booster (5), and the hydrogen in the second storage tank (2) is transferred to the user-end gas cylinder through the pre-cooling dehumidifier (10) and the hydrogenator, and the hydrogen pressure in the second storage tank (2) and the hydrogen pressure in the user-end gas cylinder are simultaneously increased; In the fifth case, the displacement fluid (4) in the displacement fluid storage tank (9) is transported to the second storage tank (2) through the liquid delivery booster (5), thereby pressurizing the hydrogen in the second storage tank (2); All gas pipelines are shut down; In the infusion line, open the infusion valve (33), infusion valve (32), infusion valve (35), and the second valve (23), and close the remaining valves; The liquid delivery booster (5) is started to operate in reverse, and the replacement fluid (4) in the replacement fluid storage tank (9) is delivered to the second storage tank (2) in a reverse delivery manner, thereby increasing the hydrogen pressure in the second storage tank (2); The third type is hydrogen pressure differential transfer, which means that the pressure of the hydrogen storage container is greater than the pressure of the target hydrogen storage container, and hydrogen is transferred from the hydrogen storage container to the target hydrogen storage container under the action of the pressure differential, without the need to use the replacement fluid (4); however, as the hydrogen is transferred, the pressure differential will gradually decrease, and finally the pressure differential will reach zero to achieve equilibrium; if further transfer and pressure increase are required, a liquid delivery booster (5) can be used to push the replacement fluid (4) for replacement transfer and pressure increase; In the first case, when the hydrogen pressure in the first storage tank (1) is greater than the hydrogen pressure in the second storage tank (2), the hydrogen in the first storage tank (1) is transferred to the second storage tank (2) through the hydrogen pressure difference; In the gas transmission pipeline, open the hydrogen control valve (12), the gas transmission control valve (85), and the hydrogen control valve (22), and close the remaining valves; In the second case, the hydrogen pressure in the first storage tank (1) is greater than the pressure in the user-end gas cylinder, and the hydrogen in the first storage tank (1) is transferred to the user-end gas cylinder through the pre-cooling dehumidifier (10) and the hydrogenation machine by the hydrogen pressure difference; In the gas transmission pipeline, open the hydrogen control valve (12), the gas transmission control valve (85), the gas outlet valve (27), the precooler gas inlet valve (1030), and the hydrogen supply valve (1033), and close the remaining valves; In the third case, when the hydrogen pressure in the second storage tank (2) is greater than the pressure in the user-end gas cylinder, the hydrogen in the second storage tank (2) is transferred to the user-end gas cylinder through the pre-cooling dehumidifier (10) and the hydrogen filling machine by the hydrogen pressure difference; For the gas pipeline, open the outlet valve (26), the precooler inlet valve (1030), and the hydrogen supply valve (1033), and close the remaining valves; In the second aspect, after the hydrogen is transferred and pressurized in the first storage tank (1), the displacement liquid (4) therein is transferred: In the first case, the replacement fluid (4) in the first storage tank (1) is transferred to the second storage tank (2); Gas pipeline, close all valves; In the infusion pipeline, when the pressure of the first storage tank (1) is greater than that of the second storage tank (2), the infusion valve (31), the infusion valve (32), the infusion valve (34), the infusion valve (39), the first valve (13), the second valve (23), and the infusion control valve (75) are opened, and the remaining valves are closed, and the pressure difference method is used to transfer the pressure until the pressure of the two tanks is balanced; when the pressure of the first storage tank (1) is less than or equal to the pressure of the second storage tank (2), the infusion valve (31), the infusion valve (33), the first valve (13), the second valve (23), and the infusion control valve (75) are opened, and the remaining valves are closed, and the liquid delivery booster (5) is started to operate in reverse, and the replacement fluid (4) in the first storage tank (1) is transferred to the second storage tank (2), so that the pressure of the second storage tank (2) is increased; In the second case, the replacement fluid (4) in the first storage tank (1) is transferred to the replacement fluid storage tank (9); Gas pipeline, close all valves; In the infusion pipeline, when the pressure of the first storage tank (1) is greater than that of the replacement fluid storage tank (9), the infusion valve (31), the infusion valve (32), the infusion valve (35), the first valve (13), and the infusion control valve (75) are opened, and the other valves are closed; the replacement fluid (4) in the first storage tank (1) flows into the replacement fluid storage tank (9) due to the pressure difference, and the pressure in the first storage tank (1) gradually decreases; the storage tank exhaust valve (91) of the replacement fluid storage tank (9) is opened to discharge hydrogen to avoid the pressure in the tank from increasing; when the pressure of the two tanks is balanced, the replacement fluid (4) stops flowing. When the pressure of the first storage tank (1) is less than or equal to the pressure of the replacement fluid storage tank (9), the infusion valve (31), the infusion valve (33), the infusion valve (34), the infusion valve (39), the infusion valve (35), the first valve (13), and the infusion control valve (75) are opened, and the remaining valves are closed; the liquid delivery booster (5) is started to operate in reverse, and the replacement fluid (4) in the first storage tank (1) is transferred to the replacement fluid storage tank (9), and at the same time, the liquid storage tank exhaust valve (91) of the replacement fluid storage tank (9) is opened to discharge hydrogen to avoid an increase in the pressure in the tank; The device is also provided with a third storage tank (20), which involves hydrogen replacement, transfer and pressurization operations between the third storage tank (20) and the first storage tank (1), the second storage tank (2), the replacement liquid storage tank (9) and the user-end gas cylinder. The principle is the same as that described above and will not be repeated here. The following is an operation of transferring the replacement fluid (4) in the replacement fluid storage tank (9) into the second storage tank (2), and transferring the hydrogen in the second storage tank (2) to the third storage tank (20) for pressurization; The gas transmission pipeline is opened with the hydrogen control valve (22) and the hydrogen control valve (202), and the other valves are closed; when the pressure of the second storage tank (2) is greater than that of the third storage tank (20), due to the pressure difference, the hydrogen in the second storage tank (2) flows into the third storage tank (20) until the pressure is balanced; when the pressure of the second storage tank (2) is less than that of the third storage tank (20), the hydrogen in the third storage tank (20) flows into the second storage tank (2) until the pressure is balanced; In the infusion pipeline, when the pressure of the second storage tank (2) is equal to that of the third storage tank (20), the infusion valve (35), the infusion valve (32), the infusion valve (33), and the second valve (23) are opened, and the remaining valves are closed; The liquid delivery booster (5) is started to operate in reverse, and the displacement fluid (4) in the displacement fluid storage tank (9) is delivered to the second storage tank (2), and the hydrogen pressure in the second storage tank (2) and the third storage tank (20) is increased simultaneously, and the hydrogen in the second storage tank (2) is transferred to the third storage tank (20); E. To avoid freezing during low-temperature winter use, take the following measures: In the first method, the replacement fluid (4) is an antifreeze solution; The second method is to cover the tank and pipeline with insulation and use water at 5°C to 30°C; The third method uses water at 5°C to 30°C. Except for the water used in the hydrogen transfer and pressurization process, the hydrogen storage tank is prevented from storing water, and the remaining water is stored in the displacement fluid storage tank (9); in this way, only the displacement fluid storage tank (9) and the pipeline are covered with the insulation layer.

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