Water electrolysis hydrogen production purification cylinder device

Abstract

A first heating rod peripheral pipe of drying tower equipment coaxially penetrates into a drying tower shell from the top end of the drying tower shell and extends into the inner bottom of the drying tower shell, the lower end of the first heating rod peripheral pipe is open, and a heater mounting flange is arranged at the end, extending out of the drying tower shell, of the upper end of the first heating rod peripheral pipe. The first heater is downwards inserted and mounted in the first heating rod peripheral pipe from the heater mounting flange; a first hydrogen inlet is formed in the position, extending out of the drying tower shell, of the first heating rod peripheral pipe, a hydrogen outlet is formed in the side wall of the top of the drying tower shell, and an annular cavity filled with a drying agent is formed between the first heating rod peripheral pipe and the drying tower shell. The two steps of deoxidation and drying are integrated in one purification cylinder, the structure is compact, and the occupied area is small. In the prior art, a temperature gradient is easily formed in a drying tower to cause large up-down temperature difference; by means of the built-in heater structure, the temperature difference between the upper portion and the lower portion in the drying tower can be more uniform, and temperature control is more accurate and rapid.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydrogen purification drying technical field, concretely relates to a water electrolysis hydrogen production purification jar device. BACKGROUND

[0002] The general process flow of water electrolysis hydrogen production is: 25-30% potassium hydroxide or sodium hydroxide aqueous solution is used as electrolyte, and the electrolytic cell usually works at 80-90°C. Water is electrolyzed into H2 and O2 in the electrolytic cell, and is introduced into the hydrogen and oxygen gas-liquid separator in the gas-liquid post-treatment device together with the un-electrolyzed alkali liquor, and the separated gas is further washed and cooled. In the alkaline water electrolysis industry, oxygen is usually not used, and is discharged into the atmosphere, and hydrogen is used. The hydrogen gas treated by the above method has a high dew point due to high water content, which cannot meet the requirements of subsequent production.

[0003] In order to remove the water contained in the hydrogen, a purification device is usually needed. The purification device usually includes a deoxidizing tank for removing trace oxygen contained in the hydrogen, a drying tower for removing water contained in the hydrogen, and a corresponding cooler.

[0004] The drying tower in the prior art needs to be heated and purged for regeneration after drying hydrogen for a period of time, so as to be used for drying next time. In the process design, a separate heating device is designed in the flow. For example, in the prior art: application number 202210212062.3 discloses a hydrogen purification device, method and hydrogen production system, which is provided with a heater 100, and the outlet of the heater 100 is communicated with the top inlet of the first drying tower 300 and the second drying tower 400. The process heats the crude hydrogen as a purge medium by the heater 100, and the hydrogen is introduced into the drying tower to regenerate the internal drying agent, so as to be used for outputting pure hydrogen subsequently.

[0005] And application number 202111277993.3 discloses a hydrogen purification system and method and electrolytic water hydrogen production system, which is also provided with a heater 5. The dried hydrogen is heated and sent into other drying towers to be dried, so as to heat and purge the drying agent in the tower for regeneration.

[0006] In summary, the prior art is to set the heater independently outside the drying tower, which has the following defects: since the heating device is independently set outside, when regenerating, the heated purge hydrogen enters from one end for purging and regeneration, which results in a large temperature difference between the upper and lower parts of the drying tower, a large temperature residual, and poor drying agent regeneration effect. In addition, the heater is separately set from the drying tower, which is not compact in structure, occupies a large area, needs to purchase multiple different equipment, has a high cost, and needs to match the loads of different equipment, which requires a large amount of design calculation and cannot be directly used without calculation, and the multiple purchases increase the procurement cost and maintenance cost. In addition, the number of equipment is increased, and the number of pipelines is also increased, which increases the pipeline laying cost.

[0007] In view of the above, it is necessary to provide a water electrolysis hydrogen purification cylinder and process system to solve the above problems. Practical new type content

[0008] The utility model discloses a water electrolysis hydrogen purification cylinder and process system, which overcomes the defects in the prior art.

[0009] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a water electrolysis hydrogen purification cylinder, which comprises a drying tower device and a deoxidizing tank device, and a pipeline connecting the two, the drying tower device comprises a drying tower shell, a first heating rod peripheral pipe and a first heater, the first heating rod peripheral pipe penetrates into the inside of the drying tower shell from the top end of the drying tower shell and extends into the bottom of the drying tower shell, the lower end of the first heating rod peripheral pipe is open, the upper end of the first heating rod peripheral pipe extends out of the end of the drying tower shell and is provided with a heater mounting flange, the first heater is inserted into the first heating rod peripheral pipe downward from the heater mounting flange, the first heating rod peripheral pipe is provided with a first hydrogen inlet outside the drying tower shell, the top side wall of the drying tower shell is provided with a hydrogen outlet, and an annular cavity filled with drying agent is formed between the first heating rod peripheral pipe and the drying tower shell.

[0010] Further, the deoxidizing tank device comprises a deoxidizing tank shell, a second placing pipe and a second heater, the second placing pipe extends into the bottom of the deoxidizing tank shell from the upper end of the deoxidizing tank shell and is left outside the deoxidizing tank shell at the upper end to form an insertion end for the second heater, the second heater is inserted into the deoxidizing tank shell from the second placing pipe, and a space filled with palladium catalyst is formed between the second placing pipe and the deoxidizing tank shell, the upper part of the deoxidizing tank shell is provided with a deoxidized hydrogen inlet, one side of the lower part of the deoxidizing tank shell is provided with a deoxidized hydrogen outlet, and the other side is provided with a feeding and discharging pipe for palladium catalyst.

[0011] Further, the drying tower shell is also provided with a packing inlet and a packing outlet for replacing the drying agent inside the drying tower equipment, the packing inlet is an upwardly inclined pipeline, and the packing outlet is a downwardly inclined pipeline; the drying tower is internally provided with a lower separation net, the drying agent is filled on the upper part of the lower separation net, and the lower separation net is arranged on the lower side of the root part close to the packing outlet.

[0012] Further, the lower separation net and the lower head of the drying tower shell form a gas distribution cavity, the lower head of the drying tower shell is provided with a second hydrogen inlet arranged in the vertical direction, the second hydrogen inlet extends into the gas distribution cavity, and a gas distribution cover is arranged on the upper end of the second hydrogen inlet, the gas distribution cover is in the form of a bowl and is buckled on the upper end of the second hydrogen inlet.

[0013] Further, the angle between the pipeline of the packing inlet and the pipeline of the packing outlet and the vertical direction is 30-60°.

[0014] Further, the hydrogen gas introduced by the water electrolysis hydrogen production electrolyzer is connected to the deoxidizing hydrogen inlet of the deoxidizing tank equipment through a hydrogen inlet pipeline, the deoxidizing hydrogen outlet is connected to the A port of the four-way valve through a hydrogen main pipeline, the B and C ports of the four-way valve are respectively connected to two parallel branch circuits including a first transmission pipeline and a second transmission pipeline, and the first transmission pipeline and the second transmission pipeline are connected to a pure hydrogen output pipeline in parallel; an intermediate cooler is arranged on the hydrogen main pipeline, a first drying tower is arranged on the first transmission pipeline, and a second drying tower is arranged on the second transmission pipeline; a purge pipeline is branched from the pure hydrogen output pipeline, the purge pipeline is connected to the D port of the four-way valve, and a flow control valve is arranged on the purge pipeline.

[0015] Further, the hydrogen gas introduced by the water electrolysis hydrogen production electrolyzer is connected to the deoxidizing hydrogen inlet of the deoxidizing tank equipment through a hydrogen inlet pipeline, the deoxidizing hydrogen outlet is connected to the first shunt control valve through a hydrogen main pipeline, the first shunt control valve is connected to two parallel branch circuits including a first transmission pipeline and a second transmission pipeline, the flow direction of the hydrogen gas is switched by the first shunt control valve, and the first transmission pipeline and the second transmission pipeline are connected to a pure hydrogen output pipeline in parallel; an intermediate cooler is arranged on the hydrogen main pipeline, a first drying tower is arranged on the first transmission pipeline, and a second drying tower is arranged on the second transmission pipeline; the two transmission pipelines are respectively connected to the second hydrogen inlets of the drying tower equipment and flow out from the hydrogen outlets;

[0016] A purge pipeline is branched from the pure hydrogen output pipeline, the purge pipeline is connected to the second shunt control valve, the second shunt control valve is connected to two parallel purge branch pipes, and the two purge branch pipes are respectively connected to the first hydrogen inlets of the two drying tower equipment; a flow control valve is arranged on the purge pipeline.

[0017] Further, the first transmission pipeline and the second transmission pipeline are respectively provided with a purge outlet pipeline downstream of the drying tower device, the two purge outlet pipelines are connected to a third shunt control valve and then to a purge outlet manifold, the purge outlet manifold is connected to a heating coil in the deoxidizing tank device for waste heat utilization, and finally connected to a post-processing device; the purge outlet manifold is provided with a cross-line pipe that passes through the deoxidizing tank device, a shut-off valve is arranged on the cross-line pipe, and a purge temperature sensor is arranged upstream of the branch of the cross-line pipe.

[0018] Further, the first transmission pipeline and the second transmission pipeline are respectively provided with a purge outlet pipeline downstream of the drying tower device, the two purge outlet pipelines are connected to a third shunt control valve and then to a purge outlet manifold, the purge outlet manifold is connected to a heating coil in the deoxidizing tank device for waste heat utilization, and finally connected to a post-processing device; the purge outlet manifold is provided with a cross-line pipe that passes through the deoxidizing tank device, a shut-off valve is arranged on the cross-line pipe, and a purge temperature sensor is arranged upstream of the branch of the cross-line pipe.

[0019] The device has the advantages and beneficial effects that: 1. Oxygen and moisture impurities in hydrogen are effectively removed through the two steps of deoxidization and drying, and the purity of hydrogen is improved; temperature transmitters and heating wires are used to monitor and control the temperature in the drying tower and the deoxidizing tank in real time, so that the stability and reliability of the purification process are ensured; the two steps of deoxidization and drying are integrated in one purification cylinder, so that the structure is compact, the occupied area is small, and installation and maintenance are facilitated.

[0020] 2. In the prior art, the heating device is arranged outside, and the hydrogen gas heated from one end of the drying tower forms a temperature gradient in the drying tower, resulting in a large temperature difference between the upper and lower parts; in the device, the built-in heater structure can make the temperature difference between the upper and lower parts of the drying tower more uniform, and the temperature control is more accurate and rapid.

[0021] 3. The system adopts a parallel connection mode of the first transmission pipeline and the second transmission pipeline, and the advantage is that when one drying tower is regenerating, the other drying tower can still work, so that the continuity and reliability of the system are ensured.

[0022] 4. A flow control valve is arranged on the purge hydrogen pipeline, so that the hydrogen purge flow into the two drying towers can be controlled, the shunt ratio of the purge hydrogen and the pure hydrogen can be controlled, and the hydrogen purge amount of the drying tower in regeneration can be effectively and accurately controlled.

[0023] 5. The hydrogen gas after being purged can be effectively utilized for waste heat in the deoxidizing tank through the heating coil, so that energy loss is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic view of the drying tower device in the utility model;

[0025] Figure 2 is a structural schematic view of the deoxidizing tank device in the utility model;

[0026] Figure 3This is the second structural schematic diagram of the drying tower equipment in this utility model;

[0027] Figure 4 This is one of the process flow diagrams of the water electrolysis hydrogen production purification cylinder of this utility model;

[0028] Figure 5 This is the second schematic diagram of the process system of the water electrolysis hydrogen production purification cylinder of this utility model;

[0029] Figure 6 This is the third structural schematic diagram of the drying tower equipment in this utility model;

[0030] In the diagram: 1. Drying tower equipment; 2. Deoxygenation tank equipment; 3. Drying tower shell; 4. First heating rod outer pipe; 5. First heater; 6. Opening; 7. Heater mounting flange; 8. First hydrogen inlet; 9. Hydrogen outlet; 10. Deoxygenation tank shell; 11. Second placement pipe; 12. Second heater; 13. Deoxygenated hydrogen inlet; 14. Deoxygenated hydrogen outlet; 15. Feed inlet / outlet pipe; 16. Packing inlet; 17. Packing outlet; 19. Lower partition; 20. Gas distribution chamber; 21. Second hydrogen inlet; 22. Gas distribution hood; 23. Intercooler; 24. Hydrogen inlet pipe; 25. Four-way valve; 26. Hydrogen main pipe; 27. Transmission Pipeline No. 1; 28. Transmission Pipeline No. 2; 29. ​​Pure Hydrogen Output Pipeline; 30. First Drying Tower; 31. Second Drying Tower; 32. Purge Pipeline; 33. Flow Control Valve; 34. First Diversion Control Valve; 35. Second Diversion Control Valve; 36. Purge Branch Pipeline; 37. Purge Outlet Pipeline; 38. Third Diversion Control Valve; 39. Purge Outlet Main Pipeline; 40. Heating Coil; 41. Sub-processing Unit; 42. Crossover Pipeline; 43. Shut-off Valve; 44. Purge Temperature Sensor; 45. Check Valve; 46. Top Temperature Sensor; 47. Bottom Temperature Sensor; 48. External Heating Wire; 49. External Insulation Layer. Detailed Implementation

[0031] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0032] A water electrolysis hydrogen production purification tank, such as Figures 1-3 As shown, the system includes a drying tower device 1 and a deoxygenation tank device 2, as well as pipes connecting the two. The drying tower device 1 includes a drying tower shell 3, a first heating rod peripheral pipe 4, and a first heater 5, as shown. Figure 1As shown, the drying tower shell 3 is in a cylindrical tube shape, and its bottom can be provided with a base part for fixing on a base surface, so that the drying tower is vertically arranged; the first heating rod peripheral pipe 4 is coaxially penetrated into the inside of the drying tower shell 3 from the top end thereof and extends into the inner bottom thereof, and the lower end of the first heating rod peripheral pipe 4 is an open end 6, and the upper end thereof extends out of the end of the drying tower shell 3 and is provided with a heater mounting flange 7, as shown in Figure 1 、 3 As shown, the first heating rod peripheral pipe 4 is a pipe coaxially arranged in the inside of the drying tower shell 3, and the upper end of the first heating rod peripheral pipe 4 is provided with a mounting flange which is arranged out of the upper head of the drying tower shell 3, and the first heater 5 is downwardly inserted into the first heating rod peripheral pipe 4 and mounted by the heater mounting flange 7, and when mounted, the first heater 5 is penetrated into the first heating rod peripheral pipe 4 from the end of the mounting flange, so that the heating part is modularly arranged, which is convenient for replacement and maintenance when the device is stopped for maintenance. In this embodiment, the heating part is arranged in the drying tower, compared with the prior art in which the heating device is arranged outside the tower, the device has high integration degree, modular assembly and convenient maintenance. Furthermore, the arrangement of the heating part in the inside of the drying tower can form internal heating of the drying tower, which avoids the disadvantage of large temperature difference between the upper and lower parts of the tower caused by the hot hydrogen gas entering from one end of the tower when the drying tower device 1 is regenerated.

[0033] The first heating rod peripheral pipe 4 is provided with a first hydrogen gas inlet 8 which extends out of the drying tower shell 3, and the top side wall of the drying tower shell 3 is provided with a hydrogen gas outlet 9, and the annular cavity filled with drying agent is formed between the first heating rod peripheral pipe 4 and the drying tower shell 3. As shown, Figure 1 The hydrogen gas raw material to be dried enters the inside of the first heating rod peripheral pipe 4 from the first hydrogen gas inlet 8, and the hydrogen gas moves downward along the first heating rod peripheral pipe 4, flows out of the open end 6 at the bottom of the first heating rod peripheral pipe 4, enters the annular cavity filled with drying agent, is dried in the annular cavity and flows upward, and then flows out of the drying tower device 1 from the upper hydrogen gas outlet 9.

[0034] Further, the drying tower shell 3 is further provided with a filling inlet 16 and a filling outlet 17 for replacing the drying agent in the inside of the drying tower device 1, as shown in Figure 1 、 3 The filling inlet 16 is used for filling the drying agent into the drying tower, and the filling outlet 17 is used for making the filling in the inside of the drying tower flow out from the bottom, so that when the drying agent in the inside of the drying tower device 1 needs to be replaced, the two pipes can be opened to replace the drying agent in the inside. As an improvement, the filling inlet 16 is an upwardly inclined pipeline, and the filling outlet 17 is a downwardly inclined pipeline; the two inclined pipelines are convenient for the entering or flowing out of the drying agent, and can make the replacement of the drying agent more complete and thorough. Further, the included angle between the pipeline of the filling inlet 16 and the vertical direction and the included angle between the pipeline of the filling outlet 17 and the vertical direction are 30-60°, and preferably 45°.

[0035] As another embodiment of the drying tower device 1, such as Figure 3 As shown, a lower partition 19 is provided inside the drying tower, and the desiccant is filled in the upper part of the lower partition 19. The lower partition 19 is located near the lower side of the root of the packing outlet 17. A gas distribution cavity 20 is formed between the lower partition 19 and the lower end cap of the drying tower shell 3. Due to the separation of the lower partition 19, the desiccant is lifted at the lower end cap of the drying tower shell 3, and a cavity is formed on the lower side of the lower partition 19 - that is, the gas distribution cavity 20. A second hydrogen inlet 21 is provided at the bottom of the lower end cap of the drying tower shell 3 in a vertical direction. The second hydrogen inlet 21 extends into the gas distribution cavity 20, and a gas distribution hood 22 is provided at its upper end. The gas distribution hood 22 is cup-shaped and fitted onto the upper end of the second hydrogen inlet 21. In this improved embodiment, the original single hydrogen inlet of the drying tower device 1 is changed to two hydrogen inlets, which are used to introduce hydrogen under different control states. Specifically, in the aforementioned implementation with only one hydrogen inlet, regardless of whether the drying tower is in drying mode or regeneration mode, hydrogen enters through the first hydrogen inlet 8. In the improved embodiment, there are two hydrogen inlets. When the drying tower equipment 1 is in the drying operation state, hydrogen enters through the second hydrogen inlet 21; while when the drying tower equipment 1 is in the regeneration operation state, hydrogen enters through the first hydrogen inlet 8. The advantages are: during the drying process, hydrogen entering through the second hydrogen inlet 21 can reduce the impact on the internal first heater 5, bypassing the ground heater and directly entering the annular cavity filled with desiccant. Entering through the second hydrogen inlet 21 can avoid the impact of cold hydrogen on the heating equipment, and the space supported by the lower partition 19 is more conducive to the distribution of purging hydrogen, avoiding uneven regeneration caused by flow deviation. Specifically, after the purging hydrogen enters through the second hydrogen inlet 21, it impacts the inverted bowl-shaped gas distribution hood 22 above, forming a uniform distribution of hydrogen, causing the hydrogen to overflow from the four edges of the gas distribution hood 22, and thus be evenly distributed in the annular cavity filled with desiccant, effectively avoiding flow deviation. In the dry state, the same as in the previous embodiment, the first heater 5 is used to heat the hydrogen gas, which then flows upwards from the bottom to be heated and dried.

[0036] like Figure 2As shown, the deoxidizing tank device 2 includes a deoxidizing tank shell 10, a second placement tube 11, and a second heater 12. The second placement tube 11 extends into the bottom of the deoxidizing tank shell 10 from the upper end thereof, and the upper end thereof is arranged outside the deoxidizing tank shell 10 to form an insertion end for the second heater 12. The second heater 12 is inserted into the deoxidizing tank shell 10 through the second placement tube 11. The top of the second placement tube 11 is provided with a flange for modular installation, so that the second heater 12 can be conveniently extracted from the inside of the deoxidizing tank when being repaired and replaced. The second placement tube 11 and the deoxidizing tank shell 10 form a space filled with palladium catalyst. The upper portion of the deoxidizing tank shell 10 is provided with a deoxidizing hydrogen inlet 13, and the lower portion is provided with a deoxidizing hydrogen outlet 149 on one side and a palladium catalyst inlet and outlet pipe 15 on the other side. In actual use, hydrogen gas from an electrolytic cell for producing hydrogen by electrolysis can enter the deoxidizing tank from the deoxidizing hydrogen inlet 13, so that the hydrogen gas containing moisture can enter the subsequent intermediate cooler 23 after removing impurities in the deoxidizing tank. Then, the hydrogen gas enters the drying tower device 1 for further adsorption and drying to form product pure hydrogen.

[0037] Further, in order to monitor the temperature inside the drying tower in real time, so as to control the temperature in the most appropriate range, such as Figure 3 As shown, the drying tower shell 3 is also provided with a top temperature sensor 46 and a bottom temperature sensor 47. In use, the two temperature sensors are used to monitor the temperature inside the drying tower. In order to avoid heat loss during regeneration, such as Figure 6 As shown, the outer wall of the drying tower shell 3 is provided with an external heating wire 48 and is wrapped with an external insulation layer 49, so as to ensure the uniformity and stability of the temperature of the regeneration heating.

[0038] As an embodiment of the process system of the device:

[0039] As shown in Figure 4As shown, the hydrogen from the hydrogen electrolysis tank for hydrogen production by water electrolysis is connected to the deoxidizing hydrogen inlet 13 of the deoxidizing tank device 2 through the hydrogen inlet pipeline 24, the deoxidizing hydrogen outlet 149 is connected to the A port of the four-way valve 25 through the hydrogen main pipeline 26, the B and C ports of the four-way valve 25 are respectively connected to two parallel branch pipes including a first transmission pipeline 27 and a second transmission pipeline 28, and the first transmission pipeline 27 and the second transmission pipeline 28 are connected to the pure hydrogen output pipeline 29; the hydrogen main pipeline 26 is provided with an intermediate cooler 23, the first transmission pipeline 27 is provided with a first drying tower 30, the second transmission pipeline 28 is provided with a second drying tower 31, and the pure hydrogen output pipeline 29 is branched to be provided with a purge pipeline 32, the purge pipeline 32 is connected to the D port of the four-way valve 25, the purge pipeline 32 is provided with a flow control valve 33, and in actual use, a part of hydrogen in the product pure hydrogen is branched off to be used for purging and regenerating the drying tower device 1, and the flow control valve 33 arranged on the purge pipeline 32 can accurately control the hydrogen flow for purging.

[0040] The pure hydrogen output pipeline 29 is branched to be provided with the purge pipeline 32, the purge pipeline 32 is connected to the second shunt control valve 35, the second shunt control valve 35 is connected to set two parallel purge branch pipes 36, the two purge branch pipes 36 are respectively connected to the first hydrogen inlets 8 of the two drying tower devices 1, and the purge pipeline 32 is provided with the flow control valve 33. The drying tower in the purging state uses the purge pipeline 32 to purge and regenerate the drying tower.

[0041] Further, the first transmission pipeline 27 and the second transmission pipeline 28 are respectively provided with a purge outlet pipeline 37 downstream of the drying tower device 1, the two purge outlet pipelines 37 are connected to a third shunt control valve 38 and converge into a purge outlet main pipeline 39, the purge outlet main pipeline 39 is connected to a heating coil 40 in the deoxidizing tank device 2 for waste heat utilization, and finally connected to a post-processing device 41; the purge outlet main pipeline 39 is provided with a cross-line pipe 42 that bypasses the deoxidizing tank device 2, a shut-off valve 43 is arranged on the cross-line pipe 42 (it can be understood that the purge outlet main pipeline 39 is also provided with a control valve downstream of the cross-line pipe 42 to control the flow direction of the purge hydrogen), and a purge temperature sensor 44 is arranged on the purge outlet main pipeline 39 upstream of the branch of the cross-line pipe 42. The first transmission pipeline 27 and the second transmission pipeline 28 are respectively provided with a one-way valve 45 downstream of the purge outlet pipeline 37, and the flow direction of the one-way valve 45 is from the drying tower device 1 to the pure hydrogen output pipeline 29. In actual use, the drying tower is regenerated by purging at a high temperature, specifically, the regeneration temperature of the drying agent in the drying tower device 1 is about 150-300°, while the operating temperature of the deoxidizing tank using palladium catalyst is usually between 50°C and 200°C, so the regeneration temperature of the drying tower is usually higher than the operating temperature of the deoxidizing tank. Therefore, in the present process, the purge outlet main pipeline 39 is connected to the heating coil 40 in the deoxidizing tank device 2, and the waste heat of the high-temperature purge hydrogen is effectively utilized, and the hydrogen in the hydrogen inlet pipeline 24 is preheated by the waste heat, thereby reducing the heat load of the second heater 12; it is worth noting that at the initial stage of the purge regeneration, the temperature of the drying tower gradually rises from low temperature, and the purge hydrogen is sent into the heating coil 40 only when the temperature of the purge temperature sensor 44 is higher than the temperature in the deoxidizing tank device 2, otherwise the cross-line pipe 42 is used to bypass the deoxidizing tower device and directly sent to the post-processing device 41.

[0042] Specifically, as shown in Figure 4 the hydrogen from the electrolytic cell is sent into the deoxidizing tank device 2 through the hydrogen inlet pipeline 24, the raw material hydrogen after removal of impurities is sent into the intermediate cooler 23 for water vapor separation, the hydrogen is sent into the first transmission pipeline 27 through the A port of the four-way valve 25 in the hydrogen main pipeline 26, at this time, the A port and the B port are communicated, so that the hydrogen is introduced into the first transmission pipeline 27, and the hydrogen is dried by the first drying tower 30, the water in the hydrogen is adsorbed by the molecular sieve, and then the hydrogen is sent into the pure hydrogen output pipeline 29 through the post one-way valve 45 and sent out as a product.

[0043] Concurrently with the above process, another second drying tower 31 is in a regeneration state. The process involves diverting a portion of the product hydrogen flow through the purge pipe 32 and controlling the purge volume via the flow control valve 33. This portion of hydrogen enters port D of the four-way valve 25. In this state, port D is connected to port C, allowing the purge hydrogen to enter the second drying tower 31 for purging and regeneration. During this process, the high-temperature purge hydrogen passes through the third diversion control valve 38 into the purge outlet main pipe 39. It can be understood that the third diversion control valve 38 is a three-way control valve. At this time, the control connects the purge outlet main pipe 39 to the second drying tower 31. This portion of high-temperature purge hydrogen enters the heating coil 40 for waste heat utilization before being sent to the downstream processing unit 41 for further processing. The third diversion control valve 38 can switch between the two drying towers, connecting to the drying tower in the regeneration state.

[0044] Two parallel transmission pipelines enable the switching of states between the two drying towers, i.e., one tower is used for drying while the other tower is used for regeneration. The switching is achieved through the action of valves such as the four-way valve 25 to achieve continuous production.

[0045] As another implementation method of the process system of this device:

[0046] like Figure 5 As shown, hydrogen from the water electrolysis hydrogen production electrolyzer is connected to the deoxygenated hydrogen inlet 13 of the deoxygenation tank equipment 2 via hydrogen inlet pipe 24. The deoxygenated hydrogen outlet 149 is connected to the first diversion control valve 34 via the hydrogen main pipe 26. The first diversion control valve 34 is connected to two parallel branch lines, including transmission pipeline 27 and transmission pipeline 28. The first diversion control valve 34 switches the direction of hydrogen flow, and transmission pipelines 27 and 28 merge and connect to the pure hydrogen output pipeline 29. An intercooler 2 is provided on the hydrogen main pipe 26. 3. A first drying tower 30 is installed on the first transmission pipeline 27, and a second drying tower 31 is installed on the second transmission pipeline 28. The two transmission pipelines are respectively connected to the second hydrogen inlet 21 of the drying tower equipment 1 and flow out from the hydrogen outlet 9. The difference between this embodiment and the aforementioned process embodiment is that this embodiment uses a drying tower equipment 1 with two inlets, a first hydrogen inlet 8 and a second hydrogen inlet 21. Its advantage is that the hydrogen can be more evenly distributed when it enters the drying tower for drying, avoiding the phenomenon of flow deviation. It can be understood that the first diversion control valve 34 and the second diversion control valve 35 switch simultaneously to control the switching operation of the two drying towers between drying and regeneration states.

[0047] The pure hydrogen output pipeline 29 is branched with a purge pipeline 32 connected to a second shunt control valve 35, the second shunt control valve 35 is connected to two parallel purge branch pipes 36, the two purge branch pipes 36 are respectively connected to the first hydrogen inlets 8 of the two drying tower devices 1, and the purge pipeline 32 is provided with a flow control valve 33. The first transmission pipeline 27 and the second transmission pipeline 28 are respectively provided with a purge outlet pipeline 37 downstream of the drying tower device 1, the two purge outlet pipelines 37 are connected to a third shunt control valve 38 and then merged into a purge outlet main pipe 39, the purge outlet main pipe 39 is connected to a heating coil 40 in the deoxidizing tank device 2 for waste heat utilization, and finally connected to a post-processing device 41; the purge outlet main pipe 39 is provided with a cross-line pipe 42 bypassing the deoxidizing tank device 2, the cross-line pipe 42 is provided with a shut-off valve 43, and the purge outlet main pipe 39 is provided with a purge temperature sensor 44 upstream of the branch of the cross-line pipe 42. The first transmission pipeline 27 and the second transmission pipeline 28 are respectively provided with a check valve 45 downstream of the purge outlet pipeline 37, and the flow direction of the check valve 45 is from the drying tower device 1 to the pure hydrogen output pipeline 29.

[0048] The hydrogen generated by the electrolytic cell is introduced into the first shunt control valve 34 after passing through the deoxidizing tower device and the intermediate cooler 23, for example, the first shunt control valve 34 is switched to control the hydrogen to enter the left first drying tower 30, then the second shunt control valve 35 is opposite, controls the purge hydrogen to enter the right second drying tower 31, realizes different control processes of the two drying towers, that is, the left side is in a drying state, and the right side is in a purge regeneration state, the hydrogen in the left drying state drying tower is dried and flows upwards to enter the pure hydrogen output pipeline 29 after passing through the corresponding check valve 45; and the hydrogen in the right side purge state drying tower flows downwards from the corresponding purge outlet pipeline 37 to enter the purge outlet main pipe 39 (a control valve is arranged upstream of the check valve 45); in the embodiment, the waste heat utilization of the purge hydrogen is the same as that in the foregoing embodiment.

[0049] The above only describes the preferred embodiments of the present application, and it should be pointed out that, for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the technical principles of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A hydrogen purification cylinder for water electrolysis, characterized by, The application relates to a drying tower device and a deoxidizing tank device, and a pipeline connecting the two, wherein the drying tower device comprises a drying tower shell, a first heating rod peripheral pipeline and a first heater; the first heating rod peripheral pipeline is coaxially penetrated into the inside of the drying tower shell from the top end of the drying tower shell and extends into the bottom of the drying tower shell; the lower end of the first heating rod peripheral pipeline is open, the upper end of the first heating rod peripheral pipeline extends out of the end of the drying tower shell and is provided with a heater mounting flange; the first heater is inserted into the first heating rod peripheral pipeline from the lower end of the heater mounting flange; the first heating rod peripheral pipeline is provided with a first hydrogen inlet outside the drying tower shell; the top side wall of the drying tower shell is provided with a hydrogen outlet; and an annular cavity filled with drying agent is formed between the first heating rod peripheral pipeline and the drying tower shell.

2. A hydrogen purification cylinder for water electrolysis according to claim 1, characterized in that, The deoxidizing tank device comprises a deoxidizing tank shell, a second placing pipeline and a second heater; the second placing pipeline is inserted into the bottom of the deoxidizing tank shell from the upper end of the deoxidizing tank shell and is left outside the deoxidizing tank shell to form an insertion end for the second heater; the second heater is inserted into the inside of the deoxidizing tank shell from the second placing pipeline; and a space filled with palladium catalyst is formed between the second placing pipeline and the deoxidizing tank shell; the upper part of the deoxidizing tank shell is provided with a deoxidizing hydrogen inlet; one side of the lower part of the deoxidizing tank shell is provided with a deoxidizing hydrogen outlet; and the other side of the lower part of the deoxidizing tank shell is provided with a palladium catalyst feeding and discharging pipeline.

3. A hydrogen purification cylinder for water electrolysis according to claim 2, characterized in that, The drying tower shell is further provided with a filler inlet and a filler outlet for replacing the drying agent in the drying tower device; the filler inlet is an upwardly inclined pipeline; and the filler outlet is a downwardly inclined pipeline; a lower separation net is arranged in the drying tower; the drying agent is filled in the upper part of the lower separation net; and the lower separation net is arranged on the lower side of the root of the filler outlet.

4. A hydrogen purification cylinder for water electrolysis according to claim 3, characterized in that, A gas distribution cavity is formed between the lower separation net and the lower head of the drying tower shell; the bottom end of the lower head of the drying tower shell is provided with a second hydrogen inlet arranged in the vertical direction; the second hydrogen inlet extends into the gas distribution cavity and is provided with a gas distribution cover on the upper end of the second hydrogen inlet; and the gas distribution cover is in the form of a bowl and is buckled on the upper end of the second hydrogen inlet.

5. A hydrogen purification cylinder for water electrolysis according to claim 3, characterized in that, The pipeline of the filler inlet and the pipeline of the filler outlet are arranged at an angle of 30-60 degrees with the vertical direction.

6. A water electrolysis hydrogen generation purification cylinder according to claim 3, characterized in that, Hydrogen introduced by a water electrolysis hydrogen production electrolytic tank is connected to the deoxidizing hydrogen inlet of the deoxidizing tank device through a hydrogen inlet pipeline; the deoxidizing hydrogen outlet is connected to the A port of a four-way valve through a hydrogen main pipeline; the B and C ports of the four-way valve are respectively connected to two parallel branch lines including a first transmission pipeline and a second transmission pipeline; the first transmission pipeline and the second transmission pipeline are connected to a pure hydrogen output pipeline; an intermediate cooler is arranged on the hydrogen main pipeline; a first drying tower is arranged on the first transmission pipeline; a second drying tower is arranged on the second transmission pipeline; a purge pipeline is branched from the pure hydrogen output pipeline; the purge pipeline is connected to the D port of the four-way valve; and a flow control valve is arranged on the purge pipeline.

7. A water electrolysis hydrogen generation purification cylinder according to claim 4, characterized by, The hydrogen gas introduced by the hydrogen electrolysis tank for hydrogen production by water electrolysis is connected to the deoxidizing hydrogen inlet of the deoxidizing tank equipment through the hydrogen inlet pipeline, and the deoxidizing hydrogen outlet is connected to the first shunt control valve through the hydrogen main pipeline. The first shunt control valve is connected to two parallel branch pipes including a first transmission pipeline and a second transmission pipeline. The flow direction of hydrogen is switched by the first shunt control valve. The first transmission pipeline and the second transmission pipeline are connected to the pure hydrogen output pipeline in parallel. An intermediate cooler is arranged on the hydrogen main pipeline. A first drying tower is arranged on the first transmission pipeline. A second drying tower is arranged on the second transmission pipeline. The two transmission pipelines are connected to the second hydrogen inlet of the drying tower equipment and flow out from the hydrogen outlet. The pure hydrogen output pipeline is branched to provide a purge pipeline. The purge pipeline is connected to a second shunt control valve. The second shunt control valve is connected to two parallel purge branch pipes. The two purge branch pipes are connected to the first hydrogen inlets of the two drying tower equipment respectively. A flow control valve is arranged on the purge pipeline.

8. A hydrogen purification cylinder for water electrolysis according to claim 6 or 7, characterized in that, The first transmission pipeline and the second transmission pipeline are respectively provided with a purge outlet pipeline downstream of the drying tower equipment. The two purge outlet pipelines are connected to a third shunt control valve and flow into a purge outlet main pipeline. The purge outlet main pipeline is connected to a heating coil in the deoxidizing tank equipment for waste heat utilization and is finally connected to a post-processing device. The purge outlet main pipeline is provided with a cross-line pipe that passes through the deoxidizing tank equipment. A shut-off valve is arranged on the cross-line pipe. A purge temperature sensor is arranged on the purge outlet main pipeline upstream of the branch of the cross-line pipe.

9. A hydrogen purification cylinder for water electrolysis according to claim 8, characterized in that, The first transmission pipeline and the second transmission pipeline are respectively provided with a one-way valve downstream of the purge outlet pipeline. The flow direction of the one-way valve is from the drying tower equipment to the pure hydrogen output pipeline in one direction.

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