Hydrogen purification system for producing hydrogen by electrolyzing water

Abstract

The utility model discloses a hydrogen purification system for producing hydrogen by electrolyzing water, which belongs to the technical field of hydrogen purification for producing hydrogen by electrolyzing water and comprises a deoxidation unit and an adsorption regeneration unit connected with the deoxidation unit. Wherein the adsorption regeneration unit comprises a rotary bin module, the rotary bin module is connected with the deoxidation unit, an adsorbent is filled in the rotary bin module, the rotary bin module comprises a shell, and an inner cavity of the shell is divided into an adsorption area, a regeneration area and a cooling area; a blow-cooling mechanism; and a heat exchange mechanism. The shell is divided into the adsorption area, the regeneration area and the cooling area, the rotating cylinder is divided into the fan-shaped cavities with the same size under the partition plates, the rotating cylinder circularly rotates in the shell, and adsorbents in the fan-shaped cavities in the rotating cylinder are continuously desorbed and regenerated on line under the action of the heat exchange mechanism and the blow-cooling mechanism. The technical problems of complex system and unstable operation in the prior art are solved, and the technical effect of cyclic utilization of the adsorbent is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrolytic water hydrogen production hydrogen purification technical field, especially electrolytic water hydrogen production hydrogen purification system. BACKGROUND

[0002] As a kind of mature technology and low cost hydrogen production method, alkaline electrolytic water hydrogen production has been widely applied in recent years.In the hydrogen purification process, currently catalytic oxygen removal plus three-tower adsorption drying process is commonly used process flow, in the process flow, three adsorption towers are used for cyclic operation, i.e., adsorption, regeneration, cooling three stages.Different adsorption towers are controlled by a large number of automatic valves to realize cyclic switching.

[0003] In prior art, traditional control system relies on the accurate control of multiple automatic valves, and the reliability of valve itself and frequent on-off action can affect the damage of valve, increase the complexity of system control and the probability of equipment failure, and further affect the long-term stable operation of hydrogen purification system. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the shortcomings of system complexity and unstable operation in prior art, and provides electrolytic water hydrogen production hydrogen purification system.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] The utility model provides a kind of electrolytic water hydrogen production hydrogen purification system, comprising:

[0007] Deoxidation unit and adsorption regeneration unit connected with deoxidation unit;

[0008] Wherein, the adsorption regeneration unit includes:

[0009] Rotary bin module, the rotary bin module is connected with the deoxidation unit, and the rotary bin module is filled with adsorbent, and the rotary bin module includes shell, and the cavity in the shell interior is composed of adsorption area, regeneration area and cooling area;Gas pipe is further provided on the shell;

[0010] Blowing cooling mechanism, one end of the blowing cooling mechanism is connected with the gas pipe, and the other end is connected with the cooling area;

[0011] Heat exchange mechanism, one end of the heat exchange mechanism is connected with the cooling area, and the other end is connected with the regeneration area, and forms a loop with the regeneration area.

[0012] In some feasible embodiment ways, the rotary bin module further includes:

[0013] A rotating cylinder is arranged in the cavity of the shell and movably connected with the shell; the rotating cylinder is provided with a plurality of partitions to divide the rotating cylinder into a plurality of fan-shaped cavities of equal size, and each fan-shaped cavity is filled with an adsorbent;

[0014] A driver is fixedly arranged on the shell, and the output end of the driver is fixedly connected with the rotating cylinder to provide power for the rotation of the rotating cylinder.

[0015] Among them, three groups of sealing elements are arranged between the rotating cylinder and the shell, and the three groups of sealing elements are fixedly arranged in the shell.

[0016] In some possible embodiments, the rotating cylinder rotates in the direction from the adsorption zone to the regeneration zone, and then to the cooling zone, and rotates slowly or intermittently in this direction.

[0017] In some possible embodiments, the deoxidizing unit comprises:

[0018] A first heat exchanger, one end of which is connected with the hydrogen gas outlet of the gas-liquid separator of the alkaline electrolysis water hydrogen production device, for primary heating and primary cooling of the raw hydrogen gas;

[0019] A first heater, which is connected with the first heat exchanger, for secondary heating of the raw hydrogen gas;

[0020] A deoxidizer, the gas inlet end of which is connected with the first heater, and the gas outlet end of which is connected with the first heat exchanger, and the deoxidizer is filled with a catalyst for removing impurity oxygen in the raw hydrogen gas;

[0021] A cooler, which is connected with the end of the first heat exchanger away from the deoxidizer, for secondary cooling of the raw hydrogen gas;

[0022] A gas-water separator, one end of which is connected with the cooler, and the other end of which is connected with the adsorption zone, and the gas-water separator is used for separating and removing condensed water in the raw hydrogen gas.

[0023] In some possible embodiments, the cooling and blowing mechanism comprises:

[0024] A hydrogen branch pipe, one end of which is connected with the gas conveying pipe, and the other end of which is connected with the cooling zone;

[0025] A flow regulating valve, which is arranged on the hydrogen branch pipe, and is used for controlling the flow state of the regenerated hydrogen gas into the hydrogen branch pipe;

[0026] A booster fan is arranged on the hydrogen branch pipe, and the high-temperature adsorbent in the cooling zone is blown and cooled by the booster fan after the booster fan boosts the regenerated hydrogen.

[0027] In some possible embodiments, the heat exchange mechanism comprises:

[0028] A second heat exchanger, one end of which is in communication with the gas outlet of the cooling zone, and the other end of which is in communication with the regeneration zone, is used for one-stage heating and one-stage cooling of the regenerated hydrogen.

[0029] A second heater, one end of which is in communication with the second heat exchanger, and the other end of which is in communication with the regeneration zone, is used for two-stage heating of the regenerated hydrogen.

[0030] In some possible embodiments, the raw hydrogen enters the adsorption zone from bottom to top, the regenerated hydrogen enters the cooling zone from top to bottom or from bottom to top, and the heated regenerated hydrogen enters the regeneration zone from top to bottom.

[0031] In some possible embodiments, the adsorbent can be any one of activated alumina, molecular sieve or other similar adsorbents.

[0032] In some possible embodiments, the first heater and the second heater are both electric heaters.

[0033] The present application has the following beneficial effects:

[0034] By dividing the internal cavity of the shell into the adsorption zone, the regeneration zone and the cooling zone, the rotating cylinder is divided into a plurality of fan-shaped cavities of equal size under a plurality of partitions, and the rotating cylinder is circulated and rotated in the shell, so that the adsorbent in the fan-shaped cavities in the rotating cylinder is continuously regenerated on line under the action of the heat exchange mechanism and the blowing and cooling mechanism, the technical problems of complex system and unstable operation in the prior art are solved, and the technical effect of recycling of the adsorbent is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a whole structure schematic view of the hydrogen purification system for electrolytic water hydrogen provided in the embodiments of the present application;

[0036] The marks in the figure are shown as follows:

[0037] 1, deoxidation unit; 11, first heat exchanger; 12, first heater; 13, deoxidizer; 14, cooler; 15, gas-water separator;

[0038] 2, adsorption regeneration unit; 21, rotary bin module; 211, shell; 2111, adsorption zone; 2112, regeneration zone; 2113, cooling zone; 212, gas conveying pipe; 213, rotating cylinder; 214, driver; 22, cold blowing mechanism; 221, hydrogen branch pipe; 222, flow regulating valve; 223, booster fan; 23, heat exchange mechanism; 231, second heat exchanger; 232, second heater. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0040] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0041] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In addition, if the present application embodiments involve "first", "second" and the like, the "first", "second" and the like are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B schemes. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that those skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0043] Referring to Figure 1 The utility model discloses to realize the solution of the system complex, the operation of the shortcoming of not stable in the prior art, the utility model provides a hydrogen purification system of electrolytic water hydrogen in one aspect in the embodiment, including deoxidation unit 1 to the adsorption regeneration unit 2 that is connected with deoxidation unit 1. Specifically, deoxidation unit 1 is connected with alkaline electrolytic water hydrogen device gas-liquid separator hydrogen gas outlet intercommunication, and raw material hydrogen gas passes this outlet and enters deoxidation unit 1, and raw material hydrogen gas is purified to remove oxygen. The adsorption regeneration unit 2 is connected with deoxidation unit 1, and the adsorption regeneration unit 2 is used for deep adsorption to water vapor, and simultaneously makes adsorbent realize online desorption regeneration.

[0044] Among them, the adsorption regeneration unit 2 includes rotary bin module 21, blow cooling mechanism 22 connected with rotary bin module 21 and heat exchange mechanism 23 connected with rotary bin module 21. Specifically, the rotary bin module 21 is connected with the deoxidation unit 1, and the rotary bin module 21 is filled with an adsorbent for adsorbing water vapor, the rotary bin module 21 includes a cylindrical structure shell 211, the shell 211 is used to protect the sensitive components inside from the influence of external environment (such as dust, corrosive gas, etc.), improve the service life and efficiency of the equipment, the shell 211 is a cavity inside, the cavity is divided into three regions according to the characteristics of the flowing gas, three regions are adsorption zone 2111, regeneration zone 2112 and cooling zone 2113. Further, the adsorption zone 2111 is used for deep adsorption removal of water vapor in raw material hydrogen to obtain high-purity dry product hydrogen. The regeneration zone 2112 is used for high-temperature desorption regeneration of the adsorbent. The cooling zone 2113 is used for cooling the desorbed high-temperature adsorbent. The shell 211 is also provided with three gas inlets and three gas outlets, three gas inlets and three gas outlets correspond to the adsorption zone 2111, the regeneration zone 2112 and the cooling zone 2113 in the shell 211 respectively, that is, each partition is provided with a gas outlet and a gas inlet, for the flow of gas.

[0045] In some preferred embodiments, the gas inlet of the adsorption zone 2111 is arranged at the lower end of the shell 211, and the gas outlet is arranged at the upper end of the shell 211; the gas inlet of the regeneration zone 2112 is arranged at the upper end of the shell 211, and the gas outlet is arranged at the lower end of the shell 211; and the gas inlet of the cooling zone 2113 is arranged at the lower end of the shell 211, and the gas outlet is arranged at the upper end of the shell 211. That is, the raw hydrogen gas enters the adsorption zone 2111 from bottom to top, the regenerated hydrogen gas enters the cooling zone 2113 from bottom to top or from top to bottom, and the heated regenerated hydrogen gas enters the regeneration zone 2112 from top to bottom. Specifically, since the adsorbent is filled in each region of the rotating cylinder 213 to a certain thickness, during the gradual flow of the raw hydrogen gas from bottom to top through the adsorbent layer in the adsorption zone 2111, the water vapor in the raw hydrogen gas will be gradually adsorbed by the adsorbent layer, and the water vapor content will gradually decrease. The water adsorbed by the adsorbent layer from bottom to top is also gradually reduced. In addition, the residual adsorbed water content of the upper adsorbent layer is lower than that of the lower adsorbent layer after the adsorbent is regenerated and cooled. Therefore, the upper adsorbent layer always has stronger adsorption capacity than the lower adsorbent layer. This makes the hydrogen gas finally flowing out of the adsorption zone 2111 have a lower water content, thereby improving the quality and stability of the product. During the flow of the high-temperature regenerated hydrogen gas through the adsorbent layer in the regeneration zone 2112, the uppermost part of the adsorbent can first achieve good desorption and regeneration effect. Because the temperature of the regenerated hydrogen gas entering the regeneration zone 2112 is high and the water vapor content in the regenerated hydrogen gas is the lowest at this time, the upper adsorbent in the regeneration zone 2112 has stronger regeneration capacity. As the regenerated hydrogen gas flows from top to bottom, the temperature gradually decreases, and the regeneration capacity also gradually decreases. However, the upper adsorbent has been well regenerated, so the regeneration of the lower adsorbent is less affected. When the raw hydrogen gas and the regenerated hydrogen gas are adsorbed, their flow directions are opposite, so that the adsorption performance of the adsorbent for the raw hydrogen gas flowing from bottom to top is better, and the humidity of the product hydrogen gas obtained after adsorption is the lowest (the purity is the highest).

[0046] The shell 211 is further provided with a gas conveying pipe 212, which is in communication with the gas outlet of the adsorption zone 2111. The product hydrogen gas from the adsorption zone 2111 enters the gas conveying pipe 212 and is then conveyed to a user or a hydrogen storage tank.

[0047] One end of the cooling mechanism 22 is in communication with the gas conveying pipe 212 to divert part of the product hydrogen gas in the gas conveying pipe 212 as regenerated hydrogen gas, and the other end is in communication with the cooling zone 2113 to cool the high-temperature adsorbent in the cooling zone 2113 of the rotary bin module 21 by the regenerated hydrogen gas passing through the cooling mechanism 22.

[0048] The heat exchange mechanism 23 is used for heating and / or cooling the regenerated hydrogen, one end of which is communicated with the cooling area 2113, the other end is communicated with the regeneration area 2112, and a loop is formed between the heat exchange mechanism 23 and the regeneration area 2112, so that the regenerated hydrogen flowing into the regeneration area 2112 from the heat exchange mechanism 23 can flow back to the heat exchange mechanism 23, and the heat exchange mechanism 23 is also communicated with the deoxidation unit 1, that is, the regenerated hydrogen enters the regeneration area 2112 through the heat exchange mechanism 23, and the adsorbent in the regeneration area 2112 is regenerated by high-temperature desorption, and the regenerated hydrogen flowing out of the regeneration area 2112 is cooled by flowing back to the heat exchange mechanism 23, and the cooled regenerated hydrogen can flow into the deoxidation unit 1.

[0049] It should be understood that in the present application, the hydrogen flowing out of the hydrogen gas outlet of the gas-liquid separator of the hydrogen production device by alkaline electrolysis is raw hydrogen, and 10-50% of the hydrogen branched from the gas pipe 212 is part of the product hydrogen used for cooling and regenerating the adsorbent.

[0050] In the present embodiment, the rotary bin module 21 further comprises a rotating cylinder 213 and a driver 214 connected with the rotating cylinder 213. Specifically, the rotating cylinder 213 is matched with the shell 211, that is, the rotating cylinder 213 has a cylindrical structure matched with the shell 211, and the top end of the rotating cylinder 213 is designed as an opening. The rotating cylinder 213 is arranged in the cavity of the shell 211, and the rotating cylinder 213 is movably connected with the shell 211, so that the rotating cylinder 213 rotates in the cavity. Since there is a gap between the rotating cylinder 213 and the shell 211, in order to prevent gas channeling, three groups of sealing elements are arranged in the gap between the rotating cylinder 213 and the shell 211 and fixed on the inner side of the shell 211. The included angle between the three groups of sealing elements is 120°, and the three groups of sealing elements are located at the boundary between any two of the adsorption area 2111, the regeneration area 2112 and the cooling area 2113, so as to ensure that the gas flows through the adsorption area 2111, the regeneration area 2112 and the cooling area 2113 do not channel each other. The rotating cylinder 213 is provided with a plurality of baffles matched with the sealing elements. The plurality of baffles are uniformly distributed in the radial direction of the rotating cylinder 213, and one end of the plurality of baffles fixedly connected at the center of the rotating cylinder 213, so as to divide the rotating cylinder 213 into a plurality of fan-shaped cavities of equal size, and each fan-shaped cavity is filled with adsorbent. That is, during the rotation of the rotating cylinder 213 or when the rotating cylinder 213 stops rotating, the baffles form a sealing surface with the sealing elements, so as to reduce the possibility of mutual channeling between the gas flows through the adsorption area 2111, the regeneration area 2112 and the cooling area 2113, and the adsorbent in each fan-shaped cavity can rotate with the rotating cylinder, so as to realize dynamic change in the adsorption area 2111, the regeneration area 2112 and the cooling area 2113.

[0051] In some preferred embodiments, the adsorbent can be any one of activated alumina, molecular sieve or other similar adsorbent, for example, activated alumina is used as the adsorbent, because it has strong adsorption function, and can realize desorption regeneration function at high temperature, thereby improving the adsorption efficiency of water in hydrogen.

[0052] In this embodiment, the rotating cylinder 213 rotates in the direction from the adsorption zone 2111 to the regeneration zone 2112, and then to the cooling zone 2113, and rotates slowly or intermittently in this direction, so that each sector cavity in the rotating cylinder 213 can stay in the adsorption zone 2111, the regeneration zone 2112 and the cooling zone 2113 for a predetermined time, and then rotate to the next designated position. For example, when the driver 214 is started, a plurality of sector cavities located in the adsorption zone 2111 rotate to the regeneration zone 2112, a plurality of sector cavities located in the regeneration zone 2112 rotate to the cooling zone 2113, and a plurality of sector cavities located in the cooling zone 2113 rotate to the adsorption zone 2111, and this cycle is repeated, so that the adsorbent in each sector cavity can complete the corresponding operation in the corresponding adsorption zone 2111, regeneration zone 2112 and cooling zone 2113, thereby realizing the periodic cycle process of online continuous adsorption, regeneration and cooling of the adsorbent.

[0053] The driver 214 is fixedly arranged on the shell 211, and the output end of the driver 214 is fixedly connected with the rotating cylinder 213 to provide power for the rotation of the rotating cylinder 213. Preferably, the driver 214 is an electric machine, a motor or other power-providing structure. For example, to realize the periodic rotation of the rotating cylinder 213, the electric machine is a stepping motor, which includes coil winding, stator, rotor and other components, and the precise rotation is realized by controlling the electromagnetic field generated by the energized stator winding in sequence and adjusting the rotor position, thereby controlling the rotation angle of the rotating cylinder 213 connected therewith and the interval time of each rotation.

[0054] By dividing the shell 211 into the adsorption zone 2111, the regeneration zone 2112 and the cooling zone 2113, the rotating cylinder 213 is divided into a plurality of sector cavities of equal size under a plurality of partitions, and the rotating cylinder 213 rotates in the shell 211 to realize online continuous desorption regeneration of the adsorbent in the sector cavities in the rotating cylinder 213 under the action of the heat exchange mechanism 23 and the cooling blowing mechanism 22, thereby solving the technical problems of complex system and unstable operation in the prior art, and realizing the technical effect of recycling of the adsorbent.

[0055] In this embodiment, the deoxidizing unit 1 includes a first heat exchanger 11, a first heater 12 and a cooler 14 connected with the first heat exchanger 11, a deoxidizer 13 connected with the first heater 12, and a gas-water separator 15 connected with the cooler 14.

[0056] Specifically, one end of the first heat exchanger 11 is connected to the hydrogen gas outlet of the gas-liquid separator of the alkaline electrolytic water hydrogen production device, and the first heat exchanger 11 is used for primary heating and primary cooling of the raw hydrogen gas. The first heater 12 is connected to the first heat exchanger 11, and the first heater 12 is used for secondary heating of the raw hydrogen gas.

[0057] The gas inlet end of the deoxidizer 13 is connected to the first heater 12, and the gas outlet end is connected to the first heat exchanger 11. The deoxidizer 13 is filled with a catalyst. After the raw hydrogen gas enters the deoxidizer 13, it reacts to remove impurity oxygen in the hydrogen gas. After the raw hydrogen gas is heated twice by the first heat exchanger 11 and the first heater 12 and then flows into the deoxidizer 13, the temperature of the raw hydrogen gas is increased to the temperature at which it reacts with the catalyst, so that the raw hydrogen gas reacts with the catalyst under high-temperature conditions to generate water, and then flows back to the first heat exchanger 11 for primary cooling. Preferably, the catalyst is a palladium catalyst, a platinum catalyst, or other catalyst with stable catalytic performance and high activity to improve catalytic efficiency. The cooler 14 is connected to the end of the first heat exchanger 11 away from the deoxidizer 13, and is used for secondary cooling of the raw hydrogen gas. One end of the gas-water separator 15 is connected to the end of the cooler 14 away from the first heat exchanger 11, and the other end is connected to the gas inlet of the adsorption zone 2111 in the shell 211. The gas-water separator 15 is used for separating and removing condensed water in the raw hydrogen gas. The raw hydrogen gas that comes out of the gas-water separator 15 enters the adsorption zone 2111, where the adsorbent in the corresponding area of the rotating cylinder 213 deeply adsorbs and removes water vapor to obtain high-purity dry product hydrogen gas.

[0058] In some preferred embodiments, the cooler 14 is a water-cooled industrial water chiller, which includes a cooler 14, a water pump, a cooling tower, and other structures, and has high cooling efficiency and low maintenance cost to provide stable and efficient heat dissipation for the raw hydrogen gas and the regenerated hydrogen gas. More preferably, the cooler 14 uses the counterflow principle, so that the flow direction of the cooling liquid in the cooler 14 is opposite to the flow direction of the hydrogen gas, to optimize the cooling effect.

[0059] In the embodiment, the cooling mechanism 22 comprises a hydrogen branch pipe 221, a flow regulating valve 222 and a booster fan 223. One end of the hydrogen branch pipe 221 is communicated with the gas conveying pipe 212, and the other end is communicated with the cooling zone 2113, so as to introduce part of the product hydrogen in the gas conveying pipe 212 into the rotary bin module 21 located in the cooling zone 2113. The flow regulating valve 222 is arranged on the hydrogen branch pipe 221, and is used to control the flow state of the regenerated hydrogen into the hydrogen branch pipe 221. The flow regulating valve 222 controls the flow by changing the size or shape of the channel in the valve body, which includes but is not limited to common regulating valves such as butterfly valves, stop valves, gate valves and throttle valves.

[0060] The booster fan 223 is arranged on the hydrogen branch pipe 221 and located at one end close to the cooling zone 2113, so that the regenerated hydrogen flowing into the cooling zone 2113 from the hydrogen branch pipe 221 is pressurized by the booster fan 223 and then used to cool the high-temperature adsorbent. Preferably, the booster fan 223 is a variable frequency centrifugal hydrogen fan, which can dynamically adjust the speed of the fan according to the pressure demand of the hydrogen, so as to overcome the resistance of the regenerated hydrogen flowing through each device, balance the pressure of the regenerated hydrogen and the raw material hydrogen entering the inlet of the cooler 14, effectively improve the efficiency and safety of hydrogen conveying, reduce the energy consumption and operation cost, and ensure the stable operation of the hydrogen conveying system.

[0061] In the embodiment, the heat exchange mechanism 23 comprises a second heat exchanger 231 and a second heater 232 connected with the second heat exchanger 231. Specifically, one end of the second heat exchanger 231 is communicated with the gas outlet of the cooling zone 2113, and the second heat exchanger 231 is used to heat and cool the regenerated hydrogen in one stage. In order to improve the temperature of the regenerated hydrogen, the second heater 232 is arranged on the pipeline between the second heat exchanger 231 and the regeneration zone 2112, one end of the second heater 232 is communicated with the second heat exchanger 231, and the other end is communicated with the regeneration zone 2112. The regenerated hydrogen heated in one stage by the second heat exchanger 231 flows into the second heater 232 for secondary heating, so that the temperature of the regenerated hydrogen entering the regeneration zone 2112 reaches the temperature requirement of the adsorbent desorption and regeneration, and the adsorbent in the adsorption zone 2111 is desorbed and regenerated at high temperature. That is, a loop is formed among the second heat exchanger 231, the second heater 232 and the regeneration zone 2112, so that the regenerated hydrogen flows into the second heat exchanger 231 and the second heater 232 in sequence for heating, and then flows into the regeneration zone 2112 for high-temperature desorption and regeneration of the adsorbent, and finally flows back into the second heat exchanger 231 for heat exchange and cooling.

[0062] In order to realize the recycling of the regenerated hydrogen, reduce the use cost, the second heat exchanger 231 is also connected with the inlet pipeline of the cooler 14, so that the high humidity regenerated hydrogen flowing into the second heat exchanger 231 flows into the inlet pipeline of the cooler 14 after being cooled by the second heat exchanger 231, is combined with the raw material hydrogen after oxygen removal, and then flows into the cooler 14 and the water separator and the adsorption area 2111, carries out dehydration adsorption, and generates product hydrogen.

[0063] In some preferred embodiments, the first heater 12 and the second heater 232 are both electric heaters, which are prior art, including electric heating tubes, electric heating films and other devices, and can directly convert electric energy into heat energy, have high heating efficiency and fast response speed, and can improve the working efficiency.

[0064] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A hydrogen gas purification system for hydrogen produced by electrolysis of water, characterized by, The application relates to a deoxidizing unit (1) and an adsorption regeneration unit (2) connected with the deoxidizing unit (1). The adsorption regeneration unit (2) comprises: a rotary bin module (21) connected with the deoxidizing unit (1), wherein the rotary bin module (21) is filled with adsorbents, the rotary bin module (21) comprises an outer shell (211), and the inner part of the outer shell (211) is composed of an adsorption zone (2111), a regeneration zone (2112) and a cooling zone (2113); and a gas conveying pipe (212) is arranged on the outer shell (211); a cooling blowing mechanism (22) connected with one end of the gas conveying pipe (212) and the other end of the cooling zone (2113); a heat exchange mechanism (23) connected with one end of the cooling zone (2113) and the other end of the regeneration zone (2112) and forming a loop with the regeneration zone (2112). The rotary bin module (21) further comprises:

2. The hydrogen purification system of claim 1, wherein, a rotating cylinder (213) arranged in the cavity of the outer shell (211) and movably connected with the outer shell (211); a plurality of partitions are arranged on the rotating cylinder (213) to divide the rotating cylinder (213) into a plurality of fan-shaped cavities of equal size, and adsorbents are filled in each fan-shaped cavity; a driver (214) fixedly arranged on the outer shell (211), wherein the output end of the driver (214) is fixedly connected with the rotating cylinder (213) to provide power for the rotation of the rotating cylinder (213); wherein three groups of sealing elements are arranged between the rotating cylinder (213) and the outer shell (211) and fixedly arranged in the outer shell (211). The rotating direction of the rotating cylinder (213) is from the adsorption zone (2111) to the regeneration zone (2112) and then to the cooling zone (2113), and the rotating cylinder (213) is slowly and circularly rotated or intermittently rotated in this direction.

3. The hydrogen purification system of claim 2, wherein, The deoxidizing unit (1) comprises:

4. The hydrogen purification system of claim 1, wherein, a first heat exchanger (11) connected with the hydrogen gas outlet of a gas-liquid separator of an alkaline electrolytic water hydrogen production device and used for primary heating and primary cooling of raw hydrogen gas; a first heater (12) connected with the first heat exchanger (11) and used for secondary heating of the raw hydrogen gas; a deoxidizer (13) connected with the first heater (12) at the gas inlet end and connected with the first heat exchanger (11) at the gas outlet end, wherein the deoxidizer (13) is filled with catalysts and used for removing impurity oxygen in the raw hydrogen gas; a cooler (14) connected with the end of the first heat exchanger (11) away from the deoxidizer (13) and used for secondary cooling of the raw hydrogen gas; ​ A gas-water separator (15) is connected to the cooler (14) at one end and to the adsorption zone (2111) at the other end, and is used to separate and remove condensed water from raw hydrogen.

5. The hydrogen purification system of claim 1, wherein, The cooling mechanism (22) comprises: A hydrogen branch pipe (221) is connected to the gas pipe (212) at one end and to the cooling zone (2113) at the other end; A flow regulating valve (222) is arranged on the hydrogen branch pipe (221) and is used to control the flow state of the regenerated hydrogen into the hydrogen branch pipe (221); A booster fan (223) is arranged on the hydrogen branch pipe (221), and the high-temperature adsorbent in the cooling zone (2113) is cooled by the regenerated hydrogen after being boosted by the booster fan (223).

6. The hydrogen purification system of claim 4, wherein the hydrogen purification system is configured to purify hydrogen produced by an electrolyzer. The heat exchange mechanism (23) comprises: A second heat exchanger (231) is connected to the gas outlet of the cooling zone (2113) at one end and is used to perform first-stage heating and first-stage cooling on the regenerated hydrogen; A second heater (232) is connected to the second heat exchanger (231) at one end and to the regeneration zone (2112) at the other end, and is used to perform second-stage heating on the regenerated hydrogen.

7. The hydrogen purification system of claim 1, wherein, Raw hydrogen enters the adsorption zone (2111) from bottom to top, regenerated hydrogen enters the cooling zone (2113) from top to bottom or from bottom to top, and the heated regenerated hydrogen enters the regeneration zone (2112) from top to bottom.

8. The hydrogen purification system of claim 1, wherein, The adsorbent can be any one of activated alumina, molecular sieve or other similar adsorbents.

9. The hydrogen purification system of hydrogen production by water electrolysis according to claim 6, characterized by, Both the first heater (12) and the second heater (232) are electric heaters.

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