A high-pressure and low-temperature water removal device for producing hydrogen by electrolyzing water

Abstract

The present invention relates to the field of hydrogen freezing and dehydration, and specifically to a high-pressure and low-temperature dehydration device for producing hydrogen by electrolyzing water. In the scheme of the present application, a first condenser, a second condenser and a third condenser are connected in series in different orders to form a first U-shaped freezing and dehydration passage and a second U-shaped freezing and dehydration passage in opposite directions. When the first condenser and the third condenser with relatively low working temperatures are frosted, they can be conveniently switched to the freezing and dehydration passage in the other direction, and the heat of the high-pressure hot saturated hydrogen is used to defrost the previously frosted condenser. At the same time, the condenser can also play a preliminary cooling role on the high-pressure hot saturated hydrogen. Thus, frosting in the condenser pipeline can be effectively prevented and eliminated, ensuring the continuous and stable flow of hydrogen.

Description

Technical Field

[0001] The invention relates to the field of hydrogen freezing and dehydration, and in particular to a high-pressure and low-temperature dehydration device for producing hydrogen by electrolyzing water. Background Art

[0002] Hydrogen production by water electrolysis is a technology that produces hydrogen by electrolyzing water molecules. This process can produce high-purity hydrogen, but the hydrogen produced under high pressure conditions often contains water vapor, forming saturated hydrogen. In many industrial applications, such as fuel cells and fine chemical processes, there are strict requirements for the purity of hydrogen, so the water in the hydrogen must be removed to achieve the required dryness standard.

[0003] Existing gas dehumidification and drying technologies mainly rely on physical molecular adsorption, increasing gas pressure, or lowering gas temperature. Increasing gas pressure can effectively remove moisture, but this will lead to a significant increase in the operating cost of the overall system. On the other hand, lowering the gas temperature is a lower-cost dehumidification method, but if the gas temperature is below the freezing point, water vapor will condense into ice. Ice may not only cause blockage of the condenser pipes and affect gas flow, but may also damage the physical structure of the system, thereby increasing maintenance costs and reducing system reliability and efficiency. Therefore, how to effectively manage and remove moisture from hydrogen to prevent condenser pipes from freezing is an important consideration in the design of high-pressure hydrogenation systems.

[0004] To address this problem, it is necessary to develop a drying system that can effectively remove moisture from hydrogen while maintaining low-cost operation. During the low-temperature dehydration process, how to effectively defrost and prevent the water vapor in the hydrogen from freezing and clogging the system has become a major challenge in designing this system. Summary of the invention

[0005] In order to solve the above problems, the present invention discloses a high-pressure and low-temperature water removal device for producing hydrogen by electrolyzing water.

[0006] In order to achieve the above objectives, the present application discloses a high-pressure and low-temperature water removal device for producing hydrogen by electrolysis of water, comprising a high-pressure hydrogenation zone and a dual-temperature refrigeration adsorption zone for freezing and dehydrating the high-pressure hot saturated hydrogen generated in the high-pressure hydrogenation zone, wherein the dual-temperature refrigeration adsorption zone comprises a first condenser, a second condenser and a third condenser connected in series;

[0007] A first water filter is connected in series between the first condenser and the second condenser, and a second water filter is connected in series between the second condenser and the third condenser;

[0008] The first water filter and the second water filter further include an outer shell and an inner cylinder rotatably disposed in the outer shell, one end of the inner cylinder being an inlet end of the gas and the other end being an outlet end; and a conical guide cylinder is installed inside the inner cylinder, the tip of the conical guide cylinder is disposed toward the inlet end of the inner cylinder, and a plurality of wind wheel blades are evenly distributed along the circumference of the tail end of the conical guide cylinder, and the outer ends of the wind wheel blades are connected to the inner cylinder;

[0009] A plurality of water vapor adsorption sheets are evenly arranged between the outlet end of the inner tube and the tail end of the conical guide tube, the outer ends of the water vapor adsorption sheets extend to the gap between the inner tube and the outer shell, and the drainage port at the bottom end of the outer shell is connected to the steam-water separator.

[0010] In the above scheme, the first condenser, the second condenser and the third condenser are connected in sequence to form a first U-shaped freezing and dehydration passage; the third condenser, the second condenser and the first condenser are connected in sequence to form a second U-shaped freezing and dehydration passage; the cooling temperature of the first condenser and the third condenser is lower than the cooling temperature of the second condenser, and the cooling temperature of the first condenser and the third condenser in the working state is less than or equal to -35°C, and the second condenser is used as a medium-temperature condenser, and its cooling temperature in the working state is 0-2°C;

[0011] The high-pressure hot saturated hydrogen generated in the high-pressure hydrogenation zone passes alternately through the first U-shaped cryohydration passage and the second U-shaped cryohydration passage to reach the hydrogen output end.

[0012] In the above scheme, the high-pressure hydrogenation zone includes a water tank and an electrolyzer, the water tank is connected to the inlet end of the electrolyzer through a pipeline, and the pipeline is driven by a circulating pump; the outlet end of the electrolyzer is connected to the dual-temperature refrigeration adsorption zone through a one-way valve; and the hydrogen output end is provided with a back pressure valve.

[0013] In the above scheme, the dual-temperature refrigeration adsorption zone further includes a first outlet control valve, a second outlet control valve, a first switching control valve, a second switching control valve and a cooling passage switching valve;

[0014] Among them, the first outlet control valve, the first switching control valve, the second switching control valve and the second outlet control valve are connected in series in sequence; the first condenser is connected to the pipeline between the first outlet control valve and the first switching control valve, the outlet end of the one-way valve is connected to the pipeline between the first switching control valve and the second switching control valve, the third condenser is connected to the pipeline between the second switching control valve and the second outlet control valve, and the first outlet control valve and the second outlet control valve are connected to the back pressure valve through pipelines respectively.

[0015] In the above scheme, the high-pressure hydrogenation zone further includes a heating zone, and the heating zone is used to heat the hydrogen entering the dual-temperature refrigeration adsorption zone.

[0016] In the above solution, the heating zone includes a heater arranged on the connecting pipeline between the high-pressure hydrogenation zone and the dual-temperature refrigeration adsorption zone.

[0017] In the above scheme, the heating zone includes a hydrogen coil arranged in the condensing radiator, and the high-pressure hot saturated hydrogen generated in the high-pressure hydrogenation zone is connected to the hydrogen coil in the condensing radiator, and is connected to the dual-temperature refrigeration adsorption zone through the hydrogen coil.

[0018] In the above scheme, a drain control valve is installed at the outlet end of the steam-water separator, and the drain control valve is connected with the water tank through a pipeline to form a filtered water reflux channel; a water level sensor is further provided in the steam-water separator, and the water level sensor is used to detect the water level in the steam-water separator and output a water level height signal to the controller, so that the controller controls the drainage volume of the drain control valve according to the water level height signal, and by controlling the drainage volume, the water level in the steam-water separator is made higher than the drainage position of the first water filter in the steam-water separator.

[0019] The high-pressure and low-temperature water removal method for producing hydrogen by electrolyzing water comprises the following steps:

[0020] According to the preset time, the high-pressure and low-temperature water removal device for producing hydrogen by electrolysis of water is alternately switched to the first U-shaped freezing and water removal action and the second U-shaped freezing and water removal action;

[0021] When the first U-shaped freezing and dehydration action is performed, the high-pressure hot saturated hydrogen enters the first U-shaped freezing and dehydration passage through the first switching control valve for freezing and dehydration. At this time, the third condenser and the second condenser in the first U-shaped freezing and dehydration passage are in a refrigeration state, and the first condenser is in a non-refrigeration state. The hydrogen after dehydration passes through the second outlet control valve to reach the back pressure valve at the hydrogen output end for use;

[0022] When the second U-shaped freezing and dehydration action is performed, the high-pressure hot saturated hydrogen enters the second U-shaped freezing and dehydration passage through the second switching control valve for freezing and dehydration. At this time, the first condenser and the second condenser in the second U-shaped freezing and dehydration passage are in a refrigeration state, and the third condenser is in a non-refrigeration state. The hydrogen after dehydration passes through the first outlet control valve to reach the back pressure valve at the hydrogen output end for use;

[0023] The preset time is 20 minutes.

[0024] Compared with the prior art, the present invention has the following advantages: in the scheme of the present application, the first condenser, the second condenser and the third condenser are connected in series according to different orders to form a first U-shaped freezing and dehydration passage and a second U-shaped freezing and dehydration passage in opposite directions; wherein the cooling temperature of the first condenser and the third condenser is lower than the cooling temperature of the second condenser, and the cooling temperature of the first condenser and the third condenser in the working state is less than or equal to -35°C; when the first condenser and the third condenser with relatively low working temperature are frosted, it is possible to conveniently switch to the freezing and dehydration passage in the other direction, and use the heat of the high-pressure hot saturated hydrogen to defrost the previously frosted condenser, and at the same time, the condenser can also play a preliminary cooling effect on the high-pressure hot saturated hydrogen; thereby, frost in the condenser pipeline can be effectively prevented and eliminated, ensuring the continuous and stable flow of hydrogen; through this design, not only the efficiency and reliability of the entire hydrogen production system are improved, but also cost optimization is achieved, providing a comprehensive and economical drying solution for hydrogen production by electrolysis of water. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the position of the first U-shaped freezing and water removal passage in the embodiment of the present application;

[0026] Figure 2 This is a schematic diagram of the position of the second U-shaped freezing and water removal passage in the embodiment of the present application;

[0027] Figure 3 Schematic diagram of the location of the heating zone in the embodiment of the present application;

[0028] Figure 4 This is a schematic diagram of a controller in an embodiment of the present application;

[0029] Figure 5 This is a schematic diagram of the overall structure of the water filter in the embodiment of the present application;

[0030] Figure 6 is a cross-sectional view of a water filter in an embodiment of the present application;

[0031] Figure 7 Schematic diagram of the internal structure of the water filter in the embodiment of the present application. DETAILED DESCRIPTION

[0032] The present invention will be further explained below in conjunction with specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0033] Example 1: See Figure 1-4, a high-pressure and low-temperature dehydration device for producing hydrogen by electrolysis of water, comprising a high-pressure hydrogenation zone and a dual-temperature refrigeration adsorption zone, wherein the dual-temperature refrigeration adsorption zone comprises a first condenser 9, a second condenser 10 and a third condenser 11; wherein the first condenser 9, the second condenser 10 and the third condenser 11 are sequentially connected to form a first U-shaped freezing and dehydration passage; the third condenser 11, the second condenser 10 and the first condenser 9 are sequentially connected to form a second U-shaped freezing and dehydration passage; the cooling temperature of the first condenser 9 and the third condenser 11 is lower than the cooling temperature of the second condenser 10, and the cooling temperature of the first condenser 9 and the third condenser 11 in the working state is less than or equal to -35°C; illustratively, the cooling temperature of the first condenser 9 and the third condenser 11 in the working state can be specifically set to -40°C to maintain a good low-temperature freezing and dehydration effect;

[0034] The second condenser 10 is a medium temperature condenser, and its cooling temperature in the working state is 0-2°C;

[0035] The high-pressure hot saturated hydrogen generated in the high-pressure hydrogenation zone passes alternately through the first U-shaped cryohydration passage and the second U-shaped cryohydration passage to reach the hydrogen output end.

[0036] Specifically, the high-pressure hydrogenation zone includes a water tank 1 and an electrolyzer 3, the water tank 1 is connected to the inlet end of the electrolyzer 3 through a pipeline, and the pipeline is driven by a circulating pump 2; the outlet end of the electrolyzer 3 is connected to the dual-temperature refrigeration adsorption zone through a one-way valve 4;

[0037] The hydrogen output end is provided with a back pressure valve 16, the one-way valve 4 on the outlet pipeline is used to prevent liquid backflow, and the back pressure valve 16 is used to maintain a constant pressure at the pump outlet.

[0038] The switching between the first U-shaped freezing and dehydrating passage and the second U-shaped freezing and dehydrating passage is realized by the first outlet control valve 5, the second outlet control valve 7, the first switching control valve 6, the second switching control valve 8 and the cooling passage switching valve 17 arranged in the dual-temperature refrigeration adsorption area;

[0039] Wherein, the first outlet control valve 5, the first switching control valve 6, the second switching control valve 8 and the second outlet control valve 7 are connected in series in sequence; the first condenser 9 is connected to the pipeline between the first outlet control valve 5 and the first switching control valve 6, the outlet end of the one-way valve 4 is connected to the pipeline between the first switching control valve 6 and the second switching control valve 8, the third condenser 11 is connected to the pipeline between the second switching control valve 8 and the second outlet control valve 7, and the first outlet control valve 5 and the second outlet control valve 7 are respectively connected to the back pressure valve 16 through pipelines;

[0040] The dual-temperature refrigeration adsorption zone is frozen and dehydrated by the cooling medium provided by the refrigeration zone, and the refrigeration zone includes a compressor 20 and a condensation radiator 19 connected by a pipeline, and the condensation radiator 19 forms an alternately connected refrigeration passage with the first condenser 9 and the third condenser 11 through the cooling passage switching valve 17, and the other end of each refrigeration passage is connected to the compressor 20 through the second condenser 10;

[0041] See also Figure 1 In the passage shown by the single-dot chain line, when the first switching control valve 6 is opened, the second switching control valve 8 is closed, the first outlet control valve 5 is closed, the second outlet control valve 7 is opened, and the cooling passage switching valve 17 is switched to the refrigeration passage corresponding to the third condenser 11: the high-pressure hot saturated hydrogen generated in the high-pressure hydrogenation zone enters the first U-shaped freezing and dehydration passage through the first switching control valve 6 for freezing and dehydration. At this time, the third condenser 11 and the second condenser 10 in the first U-shaped freezing and dehydration passage are in a refrigeration state, and the first condenser 9 is in a non-refrigeration state. The dehydrated hydrogen passes through the second outlet control valve 7 to reach the back pressure valve 16 at the hydrogen output end for use;

[0042] See also Figure 2 In the passage shown by the single dotted line, when the first switching control valve 6 is closed, the second switching control valve 8 is opened, the first outlet control valve 5 is opened, the second outlet control valve 7 is closed, and the cooling passage switching valve 17 is switched to the refrigeration passage corresponding to the first condenser 9: the high-pressure hot saturated hydrogen generated in the high-pressure hydrogenation zone enters the second U-shaped freezing and dehydration passage through the second switching control valve 8 for freezing and dehydration. At this time, the first condenser 9 and the second condenser 10 in the second U-shaped freezing and dehydration passage are in a refrigeration state, and the third condenser 11 is in a non-refrigeration state. The dehydrated hydrogen passes through the first outlet control valve 5 to reach the back pressure valve 16 at the hydrogen output end for use.

[0043] Specifically, the outlet of the condensing radiator 19 is connected to the cooling passage switching valve 17 through the temperature control expansion valve 18, and the outlet of the cooling passage switching valve 17 leads out the first cooling pipeline 171 and the second cooling pipeline 172 respectively; the temperature control expansion valve 18 is used to automatically adjust the refrigerant flow rate so that the temperature can be controlled;

[0044] The first cooling pipeline 171 is connected to the first cooling passage 902 of the first condenser 9, the first cooling passage 902 is connected to the second cooling passage 101 of the second condenser 10, and the second cooling passage 101 is connected to the compressor 20 through a pipeline, thereby forming a first cooling medium passage, see Figure 2 The passage indicated by the double-dotted line;

[0045] The second cooling pipeline 172 is connected to the third cooling passage 112 of the third condenser 11, the third cooling passage 112 is connected to the second cooling passage 101, and the second cooling passage 101 is connected to the compressor 20 through a pipeline, thereby forming a second cooling medium passage, see Figure 1 The passage indicated by the double-dotted line;

[0046] By controlling the communication position of the cooling passage switching valve 17, the first cooling medium passage and the second cooling medium passage can be switched;

[0047] See also Figure 1-2 , a temperature control induction package 181 is provided at the return air port of the compressor 20;

[0048] See also Figure 1 In the passage marked with a single dot-dashed line, when the first switching control valve 6 is opened and the second switching control valve 8 is closed, the high-pressure hot saturated hydrogen generated in the high-pressure hydrogenation zone passes through the first switching control valve 6 into the first steam-water passage 901 of the first condenser 9, the second steam-water passage 102 of the second condenser 10 and the third steam-water passage 111 of the third condenser 11, which are connected in sequence to form a first U-shaped freezing and dehydration passage, and then reaches the gas-using end at the back pressure valve 16 through the second outlet control valve 7;

[0049] When starting up for the first time, see Figure 1 In the passage shown by the double-dotted line, the second cooling medium passage is connected. In this passage, the cooling medium pipeline in the first condenser 9 is in an open circuit state. The second condenser 10 is used as a medium-temperature condenser, and its operating temperature is set in the range of 0-2°C. The third condenser 11 is used as a low-temperature condenser, and its cooling temperature is set to -40°C.

[0050] The high-pressure hot saturated hydrogen produced in the high-pressure hydrogenation zone is initially cooled by the second condenser 10 and then enters the third condenser 11 to be frozen and dehydrated at a temperature of -40°C and a pressure of 3.5MPa.

[0051] After working for a period of time, the third condenser 11 maintains low temperature operation for a long time, and frost will be generated in the pipeline part through which the hydrogen passes, thereby affecting the gas passing efficiency; at this time, the high-pressure hot saturated hydrogen generated by the electrolyzer 3 is switched to the second U-shaped freezing and dehydration passage in the opposite direction;

[0052] See Figure 2In the passage shown by the single-dot chain line, when the first switching control valve 6 is closed and the second switching control valve 8 is opened, the high-pressure hot saturated hydrogen generated in the high-pressure hydrogenation zone passes through the second switching control valve 8 into the third steam-water passage 111 of the third condenser 11, the second steam-water passage 102 of the second condenser 10 and the first steam-water passage 901 of the first condenser 9 are connected in sequence to form a second U-shaped freezing and dehydration passage, and then reaches the gas use end at the back pressure valve 16 through the first outlet control valve 5;

[0053] At the same time, the cooling passage switching valve 17 is controlled to switch the position to open the first cooling medium passage. Figure 2 The passage shown by the double-dotted line makes the first condenser 9 act as a low-temperature condenser, and its cooling temperature is set to -40°C, the second condenser 10 acts as a medium-temperature condenser, and its working temperature is set within the range of 0-2°C, and the cooling medium pipeline in the third condenser 11 is in an open circuit state;

[0054] After switching to the second U-shaped freezing and dehydration passage, the heat carried by the high-pressure hot saturated hydrogen generated in the high-pressure hydrogenation zone can, on the one hand, defrost the frost generated when the third condenser 11 is in the first U-shaped freezing and dehydration passage, and at the same time, the condenser can also play a preliminary cooling effect on the high-pressure hot saturated hydrogen; thereby, the frost in the condenser pipeline can be effectively prevented and eliminated;

[0055] Such a cycle of switching between the first U-shaped freezing and water removal passage and the second U-shaped freezing and water removal passage can complete the automatic conversion between defrosting and thawing, and ensure the continuous and stable operation of the system.

[0056] In addition, the high pressure hydrogenation zone further comprises a heating zone, which is used to heat the hydrogen entering the dual temperature refrigeration adsorption zone so as to maintain a relatively high temperature for defrosting treatment;

[0057] In a possible implementation manner, the heater 401 on the pipeline connecting the high-pressure hydrogenation zone and the dual-temperature refrigeration adsorption zone may specifically be a resistance wire heater.

[0058] A first water filter 12 is connected in series between the first condenser 9 and the second condenser 10 , and a second water filter 13 is connected in series between the second condenser 10 and the third condenser 11 .

[0059] The drain outlets of the first water filter 12 and the second water filter 13 are both connected to the steam-water separator 14. A drain control valve 15 is installed at the outlet of the steam-water separator 14. The drain control valve 15 is connected to the water tank 1 through a pipeline to form a filtered water reflux channel. The steam-water separator 14 is further provided with a water level sensor 141, which is used to detect the water level in the steam-water separator 14 and output a water level height signal to a controller, such as a PLC controller. For details, see Figure 4 The controller control relationship shown in the figure; so that the controller controls the drainage volume of the drainage control valve 15 according to the water level height signal, and by controlling the drainage volume, the water level in the steam-water separator 14 is made higher than the drainage position of the water filter 12 in the steam-water separator 14 to avoid cross-gas; the drainage control valve 15 is connected to the water tank 1 through a pipe, and the water can be returned to the water tank 1 for reuse.

[0060] Example 2: Different from Example 1, the heating zone includes a hydrogen coil 192 arranged in the condensing radiator 19, and the high-pressure hot saturated hydrogen generated in the high-pressure hydrogenation zone is connected to the hydrogen coil 192 in the condensing radiator 19, and is connected to the dual-temperature refrigeration adsorption zone through the hydrogen coil 192; the hydrogen coil 192 is connected to the cooling fins of the condensing radiator 19, and is heated by the waste heat in the condensing radiator 19, thereby saving energy.

[0061] Embodiment 3: The operation method of the high-pressure and low-temperature water removal device for producing hydrogen by electrolysis of water specifically comprises the following steps:

[0062] According to the preset time, the high-pressure and low-temperature water removal device for producing hydrogen by electrolysis of water is alternately switched to the first U-shaped freezing and water removal action and the second U-shaped freezing and water removal action;

[0063] When the first U-shaped freezing and dehydration action is performed, the high-pressure hot saturated hydrogen enters the first U-shaped freezing and dehydration passage through the first switching control valve 6 for freezing and dehydration. At this time, the third condenser 11 and the second condenser 10 in the first U-shaped freezing and dehydration passage are in a refrigeration state, and the first condenser 9 is in a non-refrigeration state. The hydrogen after dehydration passes through the second outlet control valve 7 to reach the back pressure valve 16 at the hydrogen output end for use;

[0064] When the second U-shaped freezing and dehydration action is performed, the high-pressure hot saturated hydrogen enters the second U-shaped freezing and dehydration passage through the second switching control valve 8 for freezing and dehydration. At this time, the first condenser 9 and the second condenser 10 in the second U-shaped freezing and dehydration passage are in a refrigeration state, and the third condenser 11 is in a non-refrigeration state. The hydrogen after dehydration passes through the first outlet control valve 5 to reach the back pressure valve 16 at the hydrogen output end for use;

[0065] The preset time is 20 minutes.

[0066] Example 4: See Figure 5-7 The structures of the first water filter 12 and the second water filter 13 further include an outer shell 200 and an inner cylinder 201 rotatably disposed in the outer shell 200, one end of the inner cylinder 201 being the inlet end of the gas, and the other end being the outlet end; a conical guide cylinder 202 is installed inside the inner cylinder 201, the tip of the conical guide cylinder 202 is disposed toward the inlet end of the inner cylinder 201, a plurality of wind wheel blades 221 are evenly distributed along the circumference of the tail end of the conical guide cylinder 202, the outer ends of the wind wheel blades 221 are connected to the inner cylinder 201, when the hot saturated hydrogen passes through the wind wheel blades 221, the inner cylinder 201 is driven to rotate by the wind wheel blades 221, a plurality of water vapor adsorption sheets 203 are evenly arranged between the outlet end of the inner cylinder 201 and the tail end of the conical guide cylinder 202, the water vapor adsorption sheets 203 are composed of polyester fiber and viscose fiber, and are used to adsorb and intercept droplets in the hot saturated hydrogen to make it dry;

[0067] The outer end of the water vapor adsorption sheet 203 extends to the gap between the inner cylinder 201 and the outer shell 200. When the hot saturated hydrogen passes through the wind wheel blades 221 and drives the inner cylinder 201 to rotate, the centrifugal force generated by the wind wheel blades 221 causes the water in the water vapor adsorption sheet 203 to be thrown out into the gap between the inner cylinder 201 and the outer shell 200, and then overflows from the drain port 204 at the bottom of the outer shell 200. The drain port 204 is further connected to the steam-water separator 14, and the overflowed water drops enter the steam-water separator 14 and are collected by the steam-water separator 14. The water filter of this structure can rely on the hydrogen in the pipeline to continuously drive the water vapor adsorption sheet 203 on the inner cylinder 201 to dehydrate during use, so as to ensure that it has a high adsorption effect. Compared with the water filter of the traditional structure, which needs to be shut down for replacement of the adsorption layer due to saturation of the internal adsorption layer after a period of use, the water filter of this embodiment can greatly extend the working time to ensure continuous operation.

[0068] The conical guide tube 202 is configured to be a pointed cone, which plays a guiding role and can guide the gas at the inlet end of the inner tube 201 to the water vapor adsorption sheet 203 at the rear end through the gap between the wind wheel blades 221, so that it can better contact with it.

[0069] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A high-pressure and low-temperature water removal device for producing hydrogen by electrolysis of water, characterized in that: It comprises a high-pressure hydrogenation zone and a dual-temperature refrigeration adsorption zone for freezing and removing water from the high-pressure hot saturated hydrogen generated in the high-pressure hydrogenation zone, wherein the dual-temperature refrigeration adsorption zone comprises a first condenser (9), a second condenser (10) and a third condenser (11) connected in series; A first water filter (12) is connected in series between the first condenser (9) and the second condenser (10), and a second water filter (13) is connected in series between the second condenser (10) and the third condenser (11); The first water filter (12) and the second water filter (13) further comprise an outer shell (200) and an inner cylinder (201) rotatably disposed in the outer shell (200); one end of the inner cylinder (201) is a gas inlet end, and the other end is an outlet end; a conical guide cylinder (202) is installed inside the inner cylinder (201); the tip of the conical guide cylinder (202) is disposed toward the inlet end of the inner cylinder (201); a plurality of wind wheel blades (221) are evenly distributed at the tail end of the conical guide cylinder (202) along its circumference; the outer ends of the wind wheel blades (221) are connected to the inner cylinder (201); A plurality of water vapor adsorption sheets (203) are evenly arranged between the outlet end of the inner tube (201) and the tail end of the conical guide tube (202); the outer ends of the water vapor adsorption sheets (203) extend into the gap between the inner tube (201) and the outer shell (200); and the drainage port (204) at the bottom end of the outer shell (200) is connected to the steam-water separator (14); The first condenser (9), the second condenser (10) and the third condenser (11) are connected in sequence to form a first U-shaped freezing and dehydration passage; the third condenser (11), the second condenser (10) and the first condenser (9) are connected in sequence to form a second U-shaped freezing and dehydration passage; the cooling temperature of the first condenser (9) and the third condenser (11) is lower than the cooling temperature of the second condenser (10), and the cooling temperature of the first condenser (9) and the third condenser (11) in a working state is less than or equal to -35°C; the second condenser (10) is used as a medium-temperature condenser, and its cooling temperature in a working state is 0-2°C; The high-pressure hot saturated hydrogen generated in the high-pressure hydrogenation zone passes alternately through the first U-shaped cryohydration passage and the second U-shaped cryohydration passage to reach the hydrogen output end.

2. A high-pressure and low-temperature water removal device for producing hydrogen by electrolysis of water according to claim 1, characterized in that: The high-pressure hydrogenation zone comprises a water tank (1) and an electrolyzer (3); the water tank (1) is connected to the inlet end of the electrolyzer (3) via a pipeline, and the pipeline is driven by a circulation pump (2); the outlet end of the electrolyzer (3) is connected to the dual-temperature refrigeration adsorption zone via a one-way valve (4); and the hydrogen output end is provided with a back pressure valve (16).

3. A high-pressure and low-temperature water removal device for producing hydrogen by electrolysis of water according to claim 2, characterized in that: The dual-temperature refrigeration adsorption zone further comprises a first outlet control valve (5), a second outlet control valve (7), a first switching control valve (6), a second switching control valve (8) and a cooling passage switching valve (17); The first outlet control valve (5), the first switching control valve (6), the second switching control valve (8) and the second outlet control valve (7) are connected in series in sequence; the first condenser (9) is connected to the pipeline between the first outlet control valve (5) and the first switching control valve (6); the outlet end of the one-way valve (4) is connected to the pipeline between the first switching control valve (6) and the second switching control valve (8); the third condenser (11) is connected to the pipeline between the second switching control valve (8) and the second outlet control valve (7); and the first outlet control valve (5) and the second outlet control valve (7) are respectively connected to the back pressure valve (16) through pipelines.

4. A high-pressure and low-temperature water removal device for producing hydrogen by electrolysis of water according to claim 3, characterized in that: The high-pressure hydrogenation zone further comprises a heating zone, which is used to heat the hydrogen entering the dual-temperature refrigeration adsorption zone.

5. A high-pressure and low-temperature water removal device for producing hydrogen by electrolysis of water according to claim 4, characterized in that: The heating zone comprises a heater (401) arranged on a pipeline connecting the high-pressure hydrogenation zone and the dual-temperature refrigeration adsorption zone.

6. A high-pressure and low-temperature water removal device for producing hydrogen by electrolysis of water according to claim 4, characterized in that: The heating zone comprises a hydrogen coil (192) arranged in a condensing radiator (19); the high-pressure hot saturated hydrogen generated in the high-pressure hydrogenation zone is connected to the hydrogen coil (192) in the condensing radiator (19), and is connected to the dual-temperature refrigeration adsorption zone via the hydrogen coil (192).

7. A high-pressure and low-temperature water removal device for producing hydrogen by electrolysis of water according to claim 2, characterized in that: A drainage control valve (15) is installed at the outlet end of the steam-water separator (14), and the drainage control valve (15) is connected to the water tank (1) through a pipeline to form a filtered water return channel; the steam-water separator (14) is further provided with a water level sensor (141), and the water level sensor (141) is used to detect the water level in the steam-water separator (14) and output a water level height signal to a controller, so that the controller controls the drainage volume of the drainage control valve (15) according to the water level height signal, and by controlling the drainage volume, the water level in the steam-water separator (14) is higher than the drainage position of the first water filter (12) in the steam-water separator (14).

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