CN220685251U

CN220685251U - Hydrogen production liquid separation system and hydrogen production system

Info

Publication number: CN220685251U
Application number: CN202322243631.3U
Authority: CN
Inventors: 李志平; 任九金; 江小志; 陈明星; 李露露; 王雷
Original assignee: Sunshine Hydrogen Energy Technology Co Ltd
Current assignee: Sunshine Hydrogen Energy Technology Co Ltd
Priority date: 2023-08-18
Filing date: 2023-08-18
Publication date: 2024-03-29
Anticipated expiration: 2033-08-18

Abstract

The utility model provides a hydrogen production gas-liquid separation system and a hydrogen production system. The hydrogen production gas-liquid separation system comprises: an electrolyzer configured to be capable of forming a first gas-liquid mixture; the first separator group is communicated with the outlet of the electrolytic tank and can separate the gas and the liquid of the first gas-liquid mixture and form a second gas-liquid mixture; a cooler group in communication with the outlet of the first separator group capable of cooling the second gas-liquid mixture and forming a third gas-liquid mixture; and a second separator group in communication with the outlet of the cooler group, the second separator group being configured to be capable of gas-liquid separation of the third gas-liquid mixture and formation of gas and liquid, wherein the droplet size that the second separator group is capable of separating is in the micrometer scale. The hydrogen production gas-liquid separation system of the technical scheme can solve the problem that the separator in the existing flexible hydrogen production system cannot normally function, so that the alkali content or the water content of gas entering the purification device is too high.

Description

Hydrogen production liquid separation system and hydrogen production system

Technical Field

The utility model relates to the technical field of hydrogen production, in particular to a hydrogen production gas-liquid separation system and a hydrogen production system.

Background

Along with the increasing deterioration of ecological environment, the world places more and more importance on the influence of carbon emission on ecological environment, and aims to gradually replace the existing energy structure by adopting other new energy modes such as wind, light, hydrogen and the like. The flexible hydrogen production technology is adopted, namely an electrolysis system is adopted to carry out electrolysis hydrogen production along with wind and light waves, then the hydrogen is stored, and when the wind and the light are weak or none, the stored hydrogen is converted into electricity or directly flows to the next energy link. In this way, the direct influence of wind and light wave activity on downstream energy users can be avoided. The scheme has wide application prospect and is environment-friendly, but the fluctuation of wind and light can be transferred from a downstream user to an electrolysis system, and the fluctuation of gas generated by an electrolysis tank along with the fluctuation of the electric energy is caused by the unstable input of the electric energy, so that the subsequent whole gas-liquid separation and purification treatment are not small in challenges.

Currently, hydrogen production by water electrolysis is mainly divided into alkaline water electrolysis hydrogen production and PEM water electrolysis hydrogen production. The alkaline water electrolysis hydrogen production is mainly realized by electrolyzing 30% KOH solution, a certain amount of alkali liquor is entrained in the generated gas, the alkali liquor carried in the gas is required to be removed through separating, washing and cooling procedures of a separator, a scrubber, a cooler and the like, so that gas with trace alkali content is formed, and then the subsequent purification or other treatment is carried out according to the purity requirement of the hydrogen. Compared with alkaline water electrolysis hydrogen production, PEM water electrolysis hydrogen production is performed by pure water electrolysis, so that an alkali removal process is not needed, and only water removal is needed. Whether alkaline electrolysis hydrogen production or PEM electrolysis hydrogen production, if the gas-liquid mixture output by the electrolytic tank enters the separator in a fluctuation mode, the separator designed according to a steady state is likely to not work normally, and the efficiency is low, so that the alkali content or the water content of the gas at the outlet of the separator is too high, the problems of catalyst poisoning, equipment corrosion, high energy consumption, unqualified hydrogen purity and the like of a purification device are caused in alkaline electrolysis hydrogen production, and the problems of high energy consumption, unqualified hydrogen purity and the like are caused in PEM hydrogen production.

Disclosure of Invention

The utility model mainly aims to provide a hydrogen production gas-liquid separation system and a hydrogen production system, which can solve the problem that the separator in the existing flexible hydrogen production system cannot normally function, so that the alkali content or the water content of gas entering a purification device is too high.

To achieve the above object, according to an aspect of the present utility model, there is provided a hydrogen production gas-liquid separation system comprising:

an electrolyzer configured to be capable of forming a first gas-liquid mixture;

a first separator set in communication with the outlet of the electrolyzer, the first separator set being configured to gas-liquid separate the first gas-liquid mixture and form a second gas-liquid mixture;

a cooler group in communication with the outlet of the first separator group, the cooler group configured to cool the second gas-liquid mixture and form a third gas-liquid mixture; and

and a second separator set in communication with the outlet of the cooler set, the second separator set being configured to enable gas-liquid separation of the third gas-liquid mixture and to form a gas and a liquid, wherein the droplet size that the second separator set is capable of separating is in the micrometer scale.

Further, the second separator set includes a first micro separator.

Further, the first micro-separator comprises a housing and a filter element, the housing is communicated with an outlet of the cooler group, the third gas-liquid mixture can enter the housing, the filter element is arranged in the housing, and the filter element can capture liquid in the third gas-liquid mixture.

Further, the filter element is of a cylindrical structure, a first filtering space is formed in the filter element, and a second filtering space is formed by the outer portion of the filter element and the inner wall of the shell.

Further, a first inlet and outlet, a second inlet and outlet and a first water outlet are formed in the shell, the first inlet and outlet is communicated with the first filtering space, the second inlet and outlet is communicated with the second filtering space, when the first inlet and outlet are used as inlets, the second inlet and outlet are used as outlets, the first water outlet is communicated with the second filtering space, when the first inlet and outlet are used as outlets, the second inlet and outlet are used as inlets, and the first water outlet is communicated with the first filtering space.

Further, when the first inlet and outlet are used as inlets, the first inlet and outlet are communicated with the outlets of the cooler group; or when the first inlet and the second inlet are used as outlets, the second inlet and the second outlet are communicated with the outlets of the cooler group.

Further, the first water outlet is formed in the bottom of the shell, the first inlet and the first outlet are formed in the top of the shell, and the second inlet and the second outlet are formed in the side portion of the shell.

Further, the first micro-separator also comprises a supporting structure, wherein the supporting structure is positioned inside the shell and connected with the shell, and the supporting structure is arranged at the bottom of the filter element; or alternatively, the first and second heat exchangers may be,

the first separator group comprises a hydrogen separator and an oxygen separator, the cooler group comprises a hydrogen cooler and an oxygen cooler, the second separator group further comprises a second micro separator, the first inlet and the second inlet of the first micro separator are communicated with the outlet of the hydrogen cooler, the first water outlet of the first micro separator is communicated with the hydrogen separator, the first inlet and the second inlet of the second micro separator are communicated with the outlet of the oxygen cooler, and the first water outlet of the second micro separator is communicated with the oxygen separator.

Further, the second separator set comprises a scrubber and a micro-separator, an inlet of the micro-separator being in communication with an outlet of the scrubber.

In order to achieve the above object, according to another aspect of the present utility model, there is provided a hydrogen production system including a purification device and the hydrogen production gas-liquid separation system described above, wherein an outlet of the second separator group is communicated with the purification device.

By adopting the technical scheme, the gas-liquid mixture generated by electrolysis in the electrolytic tank firstly enters the first separator set, is subjected to primary gas-liquid separation through the first separator set, is cooled through the cooler set, enters the second separator set, is subjected to secondary gas-liquid separation through the second separator set, and reduces the alkali content or the water content of gas separated from the second separator set. The particle size of the second separator set capable of separating is in the micron level, on one hand, the second separator set can be utilized to realize secondary gas-liquid separation, and the separation efficiency is increased; on the other hand, the separation particle size of the second separator group is smaller than that of the first separator group, the particle size from primary gas-liquid separation to secondary gas-liquid separation is gradually reduced, and the separation efficiency is improved again, namely, the alkali content or the water content of the gas separated by the second separator is reduced again.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 shows a schematic diagram of a hydrogen production gas-liquid separation system in accordance with an embodiment of the present utility model;

FIG. 2 shows a schematic diagram of another embodiment of a hydrogen-producing gas-liquid separation system in accordance with an embodiment of the present utility model;

FIG. 3 illustrates a perspective view of a first micro-separator of the hydrogen-producing gas-liquid separation system of FIG. 1; and

fig. 4 shows a top view of the cartridge of the first micro-separator of fig. 3.

Wherein the above figures include the following reference numerals:

1. an electrolytic cell; 21. a hydrogen separator; 211. a second drain port; 212. a first water supplementing port; 213. a first outlet; 214. a first inlet; 22. an oxygen separator; 221. a third drain port; 222. a second water supplementing port; 223. a second outlet; 224. a second inlet; 31. a hydrogen cooler; 311. a third inlet; 312. a third outlet; 313. a first cooling tube inlet; 314. a first cooling tube outlet; 315. a first return port; 32. an oxygen cooler; 321. a fourth inlet; 322. a fourth outlet; 323. a second cooling tube inlet; 324. a second cooling tube outlet; 325. a second return port; 41. a first micro-separator; 411. a housing; 4111. a housing; 4112. a top cover; 412. a filter element; 413. a first access port; 414. a second inlet and outlet; 415. a first drain port; 416. a support structure; 417. a pipe; 418. a liquid discharge pipe; 42. a second micro-separator; 5. balance tube.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Referring to fig. 1 to 4, the present utility model provides a hydrogen production gas-liquid separation system, comprising: an electrolysis cell 1 configured to be able to form a first gas-liquid mixture; a first separator group in communication with the outlet of the electrolyzer 1, the first separator group being configured to be capable of gas-liquid separation of a first gas-liquid mixture and to form a second gas-liquid mixture; a cooler group in communication with the outlet of the first separator group, the cooler group configured to cool the second gas-liquid mixture and form a third gas-liquid mixture; and a second separator set in communication with the outlet of the cooler set, the second separator set configured to gas-liquid separate the third gas-liquid mixture and form a gas and a liquid.

In this embodiment, the electrolyzer 1 may be an alkaline electrolyzer, an electrolyzer for electrolyzing 30% KOH solution, or a PEM electrolyzer for electrolyzing pure water. The first gas-liquid mixture generated by electrolysis in the electrolytic tank 1 is firstly subjected to primary gas-liquid separation through the first separator group, then is cooled through the cooler group, and is subjected to secondary gas-liquid separation through the second separator group before entering a subsequent purification device, so that the gas-liquid separation effect is improved. The electric energy input into the electrolytic tank 1 is unstable due to fluctuation of wind and light, so that the first separator set cannot normally function, namely the separation effect of the first separator set on the first gas-liquid mixture is reduced, and the second separator set is added to enable the third gas-liquid mixture which is not sufficiently separated through the second separator set to be subjected to gas-liquid separation once more, so that compared with single gas-liquid separation, the effect of the second gas-liquid separation is better, and for the scheme that the electrolytic tank 1 is an alkaline electrolytic tank, the gas-liquid separation can be carried out through the second separator set twice, namely the alkali content of the gas which finally enters the purification device is low, thereby avoiding catalyst poisoning, equipment corrosion, energy consumption increase and hydrogen purity disqualification of the purification device; for the scheme that the electrolytic tank 1 is a PEM electrolytic tank, the gas generated after the gas-liquid separation is carried out by the second separator set can be separated by two times of gas-liquid separation, namely, the water content of the gas finally entering the purification device is low, and the increase of purification energy consumption and unqualified hydrogen purity are avoided.

Referring to fig. 1 to 4, in one embodiment of the present utility model, the particle size that the second separator group can separate is in the order of micrometers.

In this embodiment, on the one hand, the second separator group realizes secondary gas-liquid separation, increasing separation efficiency; on the other hand, the separation particle size of the second separator group is smaller than that of the first separator group, the particle size from the primary gas-liquid separation to the secondary gas-liquid separation is gradually reduced, and the separation efficiency is improved again, namely, the alkali content or the water content of the gas separated by the second separator is reduced again.

Referring to fig. 1 to 4, in one embodiment of the present utility model, the second separator set includes a first micro separator 41, the first micro separator 41 includes a housing 411 and a filter element 412, the housing 411 is in communication with an outlet of the cooler set, the third gas-liquid mixture can enter the housing 411, the filter element 412 is disposed in the housing 411, and the filter element 412 can trap liquid in the third gas-liquid mixture.

In this embodiment, the third gas-liquid mixture first enters the housing 411 and then passes through the filter element 412, the filter element 412 captures the liquid in the third gas-liquid mixture, and the remaining gas is sent to the purification device. The filter element 412 is a filter element 412 with micron-sized filtration, the filtering effect is better, the quantity of the trapped liquid is more, and then the alkali content and the water content of the gas output after passing through the filter element 412 are less.

Specifically, the filter element 412 is woven using fibers of several microns to several tens of microns. The first micro-separator 41 mainly adopts the brown diffusion mechanism to defog, the lower the speed is, the higher the trapping efficiency is, so that the separation efficiency of the first micro-separator 41 only needs to be ensured under the highest power of hydrogen production, and the efficiency is higher in a low power range. Typically, the first micro-separator 41 is more than 99.5% efficient, the first separator set is more efficient, the separation particle size is as low as 0.3 microns, the lye in the third gas-liquid mixture is almost completely removed in the first micro-separator 41, typically the gas alkali content exiting the first micro-separator 41 is less than 1mg/m ³ Only trace gas saturated water is basically left in the gas, so that the alkali content of the final product gas can meet the requirement, the service life of the deoxidization catalyst can be greatly prolonged, the loading of the molecular sieve can be reduced, and the energy consumption can be reduced.

Referring to fig. 1 to 4, in one embodiment of the present utility model, the filter element 412 has a cylindrical structure, the inside of the filter element 412 forms a first filtering space, the outside of the filter element 412 and the inner wall of the housing 411 enclose a second filtering space, and a third gas-liquid mixture can enter the first filtering space, pass through the filter element 412 and be output from the second filtering space.

In this embodiment, the cartridge 412 having a cylindrical structure is more likely to trap liquid and drain liquid. Compared with a cylinder with the same volume, the cylinder structure has larger surface area, so that the contact surface of gas and liquid and fiber is increased, a container for trapping liquid is more available, and corresponding liquid drainage is easier.

In another embodiment, the third gas-liquid mixture can enter the second filter space, pass through the filter element 412, and be output from the first filter space.

Specifically, referring to the orientation shown in fig. 3, the length direction of the housing 411 (the vertical direction in fig. 3) is the same as the length direction of the filter element 412 (the vertical direction in fig. 3).

Referring to fig. 1 to 4, in one embodiment of the present utility model, a first inlet 413, a second inlet 414, and a first drain 415 are formed in a housing 411, the first inlet 413 is in communication with a first filtering space, and the second inlet 414 is in communication with a second filtering space.

In this embodiment, the first inlet 413 is used as an inlet, the second inlet 414 is used as an outlet, and the first water outlet 415 is communicated with the second filtering space, corresponding to the scheme that the third gas-liquid mixture enters the first filtering space and is output from the second filtering space. The first filtering space and the second filtering space are separated by the filter element 412, so that the third gas-liquid mixture entering the first filtering space from the first inlet and outlet 413 can be output from the second inlet and outlet 414 after passing through the filter element 412, and all the third gas-liquid mixture can be filtered by the filter element 412.

In one embodiment, the first micro-separator 41 further includes a drain pipe 418 disposed inside the housing 411, where one end of the drain pipe 418 is communicated with the second filtering space, and the other end of the drain pipe 418 can be aligned with the first drain port 415 to play a role in drainage, so as to accelerate the drainage efficiency of the liquid from the first drain port 415.

In another embodiment, the first inlet 413 serves as an outlet, the second inlet 414 serves as an inlet, and the first drain 415 communicates with the first filter space, corresponding to the third gas-liquid mixture entering the second filter space and being output from the first filter space. The first micro-separator 41 further comprises a drain pipe 418 arranged inside the housing 411, one end of the drain pipe 418 is communicated with the first filtering space, and the other end of the drain pipe 418 can be aligned with the first drain port 415, so that a better drainage effect is achieved. In this embodiment, when the third gas-liquid mixture enters the second filtering space and is output from the first filtering space, the third gas-liquid mixture enters the first filtering space in the middle through the filter element 412 and is separated into gas and liquid in the filter element 412, and since the pressure in the second filtering space is greater than the pressure in the first filtering space, the third gas-liquid mixture flowing from the second filtering space to the first filtering space can form a resistance effect on the liquid generated after the filter element 412 filters, which is inconvenient for the outflow of the liquid, and further easily causes excessive accumulation of the liquid in the first filtering space, which affects the filtering efficiency of the filter element 412. Through set up fluid-discharge tube 418 in the bottom of first filtration space, can make things convenient for the liquid in the first filtration space to in time discharge from fluid-discharge tube 418, avoid producing the problem that liquid gathered in the first filtration space, improve liquid discharge efficiency, guarantee the gas-liquid separation effect of filter core 412 better.

Referring to fig. 1 to 4, in one embodiment of the present utility model, a first drain port 415 is formed at the bottom of the housing 411, a first inlet 413 is formed at the top of the housing 411, and a second inlet 414 is formed at the side of the housing 411.

In one embodiment, when the first inlet/outlet 413 is the inlet, the first inlet/outlet 413 communicates with the outlet of the cooler package; alternatively, when the first inlet 413 is used as an outlet, the second inlet 414 communicates with the outlet of the cooler group.

When the first inlet/outlet 413 is in communication with the outlet of the cooler package, the third gas-liquid mixture in the cooler package can enter the first filter space from the first inlet/outlet 413 at the top, pass through the filter element 412 and be output from the second filter space, and then be discharged from the second inlet/outlet 414 out of the second separator package.

When the second inlet/outlet 414 is in communication with the outlet of the cooler package, the third gas-liquid mixture in the cooler package can enter the second filter space from the second inlet/outlet 414 located at the side of the housing 411, pass through the filter element 412 and be output from the first filter space, and then be discharged from the first inlet/outlet 413.

In one embodiment, the liquid captured by the filter element 412 flows along the filter element 412 to the bottom of the filter element 412 under its own weight, and after being collected, drops from the bottom of the filter element 412 to the bottom of the housing 411, and is discharged from the first drain port 415, where the first drain port 415 is provided to facilitate the discharge of the liquid. The first inlet and outlet 413 is used as an inlet, the second inlet and outlet 414 is used as an outlet, the third gas-liquid mixture enters the shell 411 from the first inlet and outlet 413, the gas formed after passing through the filter element 412 is output from the second inlet and outlet 414, and the first inlet and outlet 413 is arranged at the top of the shell 411, so that the gas-liquid mixture is conveniently connected with the outlet of the cooler group and is also convenient for the arrangement of the first micro-separator 41.

In another embodiment, the first inlet 413 is used as an outlet, the second inlet 414 is used as an inlet, the third gas-liquid mixture enters the housing 411 from the second inlet, the gas formed after passing through the filter element 412 is output from the first inlet 413, the third gas-liquid mixture enters from the side of the housing 411, and in the process of moving towards the top of the housing 411, the liquid in the third gas-liquid mixture can fall under the action of self gravity, and in combination with the filter element 412, more liquid in the third gas-liquid mixture can be discharged from the first water outlet 415, and then the alkali content and the water content of the gas formed after passing through the first micro-separator 41 are smaller.

Referring to fig. 1-4, in one embodiment of the present utility model, the first micro-separator 41 further comprises a support structure 416, the support structure 416 being located inside the housing 411 and connected to the housing 411, the support structure 416 further being connected to the filter element 412.

In this embodiment, since the third gas-liquid mixture needs to pass through the filter element 412, pressure is generated on the filter element 412, and the support structure 416 is used to increase the support strength of the filter element 412, so that the filter element 412 can form a more stable installation structure.

Referring to fig. 1-4, in one embodiment of the utility model, a support structure 416 is provided at the bottom of the cartridge 412.

In this embodiment, the support structure 416 supports the filter element 412 at the bottom of the filter element 412, preventing the filter element 412 from collapsing.

Specifically, the support structure 416 is a framework having a strength.

Referring to fig. 1 to 4, in one embodiment of the present utility model, the housing 411 includes a housing 4111 and a top cover 4112 detachably connected, the top of the housing 4111 is opened, and the top cover 4112 can close the top of the housing 4111.

In this embodiment, after the top cover 4112 is detached from the housing 4111, the top of the housing 4111 is opened to expose the filter element 412, so that the filter element 412 can be cleaned or replaced, and the operation is convenient.

Referring to fig. 1 to 4, in one embodiment of the present utility model, the first micro separator 41 further includes a pipe 417, the pipe 417 is in communication with the first inlet/outlet 413, and the pipe 417 is detachably connected to the filter element 412.

In this embodiment, the duct 417 is connected to the top housing 4112, the top housing 4112 is detachably connected to the housing 4111, and when the top housing 4112 is detached from the housing 4111, the duct 417 is detached from the filter element 412, and the duct 417 is detached from the housing 4111 as one body with the top housing 4112, i.e., the detachable arrangement of the duct 417 is for fitting the detachable arrangement of the top housing 4112.

Referring to fig. 1 to 4, in one embodiment of the present utility model, the first separator group includes the hydrogen separator 21 and the oxygen separator 22, the cooler group includes the hydrogen cooler 31 and the oxygen cooler 32, the second separator group further includes the second micro separator 42, the first inlet 413 or the second inlet 414 of the first micro separator 41 communicates with the outlet of the hydrogen cooler 31, the first water outlet 415 of the first micro separator 41 communicates with the hydrogen separator 21, the first inlet 413 or the second inlet 414 of the second micro separator 42 communicates with the outlet of the oxygen cooler 32, and the first water outlet 415 of the second micro separator 42 communicates with the oxygen separator 22.

In this embodiment, the hydrogen separator 21 includes a first container, a second water outlet 211 is formed at the bottom of the first container, the liquid generated after the first gas-liquid mixture passes through the hydrogen separator 21 is discharged from the second water outlet 211, a first inlet 214 is formed at the side of the first container, the first inlet 214 is communicated with the outlet of the electrolyzer 1, a first water supplementing port 212 and a first outlet 213 are further formed at the top of the first container, the first water supplementing port 212 is communicated with a water source, and the first outlet 213 is communicated with the hydrogen cooler 31; the oxygen separator 22 comprises a second container, a third water outlet 221 is formed in the bottom of the second container, liquid generated after the first gas-liquid mixture passes through the oxygen separator 22 is discharged from the third water outlet 221, a second inlet 224 is formed in the side part of the second container, the second inlet 224 is communicated with the outlet of the electrolytic tank 1, a second water supplementing port 222 and a second outlet 223 are further formed in the top of the second container, the second water supplementing port 222 is communicated with a water source, and the second outlet 223 is communicated with the oxygen cooler 32; the first container communicates with the second container through a balancing pipe 5.

The hydrogen cooler 31 comprises a third container, a third inlet 311 and a first reflux port 315 are formed in the bottom of the third container, the third inlet 311 is communicated with the first outlet 213, a second gas-liquid mixture generated after passing through the hydrogen separator 21 is output from the first outlet 213 to the first container, and enters the third container from the first inlet 214, the first reflux port 315 is communicated with the first container, and liquid formed after being cooled by the hydrogen cooler 31 is refluxed to the hydrogen separator 21, so that the liquid reflux efficiency can be accelerated, and the reflux structure is simplified. A third outlet 312 is formed in the top of the third container, the third outlet 312 is communicated with the first micro-separator 41, a first cooling pipe inlet 313 and a first cooling pipe outlet 314 which are coaxial are also formed on two sides of the third container, the first cooling pipe inlet 313 and the first cooling pipe outlet 314 penetrate through the third container, and a cooling pipeline enters the third container through the first cooling pipe inlet 313 and the first cooling pipe outlet 314; the oxygen cooler 32 comprises a fourth container, a fourth inlet 321 and a second reflux port 325 are formed in the bottom of the fourth container, the fourth inlet 321 is communicated with the second outlet 223, a second gas-liquid mixture generated after passing through the oxygen separator 22 is output from the second outlet 223 to the second container and enters the fourth container from the fourth inlet 321, the second reflux port 325 is communicated with the second container, liquid formed after cooling by the oxygen cooler 32 flows back into the oxygen separator 22 and is separated again through the oxygen separator 22 so as to fully separate gas in the liquid, a fourth outlet 322 is formed in the top of the fourth container, the fourth outlet 322 is communicated with the second micro separator 42, a second cooling pipe inlet 323 and a second cooling pipe outlet 324 which are coaxial are also formed on two sides of the fourth container and penetrate through the fourth container, and a cooling pipeline enters the fourth container through the second cooling pipe inlet 323 and the second cooling pipe outlet 324.

The second micro separator 42 and the first micro separator 41 may be the same or different, the first water outlet 415 of the first micro separator 41 is communicated with the hydrogen separator 21, and the liquid separated by the first micro separator 41 flows back into the hydrogen separator 21 again to prevent the liquid from being secondarily entrained; also, the first drain port 415 of the second micro separator 42 communicates with the oxygen separator 22, and the liquid separated by the second micro separator 42 is returned to the oxygen separator 22 again, preventing the liquid from being secondarily entrained.

Referring to fig. 1 to 4, in one embodiment of the present utility model, an electrolytic cell 1 is provided in one or more.

In this embodiment, a plurality of electrolytic cells 1 can perform electrolysis simultaneously, so that the electrolysis efficiency is high, and the hydrogen production efficiency is high.

In one embodiment, the second separator set comprises a scrubber and a micro separator, an inlet of the micro separator being in communication with an outlet of the scrubber. In the present embodiment, the structure of the micro separator is the same as that of the first micro separator 41 described above, and will not be described in detail here.

The utility model also provides a hydrogen production system which comprises a purification device and the hydrogen production gas-liquid separation system, wherein the outlet of the second separator set is communicated with the purification device.

The hydrogen production gas-liquid separation system of the hydrogen production system of this embodiment has all the technical schemes and all the technical effects of the hydrogen production gas-liquid separation system described above, and will not be described here again.

From the above description, it can be seen that the above-described embodiments of the present utility model achieve the following technical effects: the gas-liquid mixture generated by electrolysis in the electrolytic tank firstly enters the first separator group, is subjected to primary gas-liquid separation through the first separator group, is cooled by the cooler group, enters the second separator group, is subjected to secondary gas-liquid separation through the second separator group, reduces the alkali content or the water content of gas separated from the second separator group, and the first separator group is matched with the second separator group, so that the alkali content or the water content of the gas entering the purification device is lower, and further the problems of catalyst poisoning, equipment corrosion, energy consumption increase, unqualified hydrogen purity and the like of the purification device in alkaline electrolysis hydrogen production are avoided, and meanwhile, the problems of high energy consumption, unqualified hydrogen purity and the like of the purification device in PEM hydrogen production are avoided.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A hydrogen-producing gas-liquid separation system, comprising:

an electrolysis cell (1) configured to be able to form a first gas-liquid mixture;

a first separator group in communication with the outlet of the electrolyzer (1), the first separator group being configured to be able to gas-liquid separate the first gas-liquid mixture and form a second gas-liquid mixture;

a cooler set in communication with the outlet of the first separator set, the cooler set configured to cool the second gas-liquid mixture and form a third gas-liquid mixture; and

2. Hydrogen production gas-liquid separation system according to claim 1, characterized in that the second separator group comprises a first micro-separator (41).

3. The hydrogen production gas-liquid separation system according to claim 2, wherein the first micro-separator (41) comprises a housing (411) and a filter element (412), the housing (411) being in communication with the outlet of the cooler package, the third gas-liquid mixture being able to enter the housing (411), the filter element (412) being arranged within the housing (411), the filter element (412) being able to trap liquid in the third gas-liquid mixture.

4. A hydrogen gas-liquid separation system according to claim 3, wherein the filter element (412) has a cylindrical structure, a first filtering space is formed inside the filter element (412), and a second filtering space is formed by the outside of the filter element (412) and the inner wall of the housing (411).

5. The hydrogen production gas-liquid separation system according to claim 4, wherein a first inlet and outlet (413), a second inlet and outlet (414) and a first water outlet (415) are formed in the housing (411), the first inlet and outlet (413) is communicated with the first filtering space, the second inlet and outlet (414) is communicated with the second filtering space, the second inlet and outlet (414) is an outlet when the first inlet and outlet (413) is an inlet, the first water outlet (415) is communicated with the second filtering space, the second inlet and outlet (414) is an inlet when the first inlet and outlet (413) is an outlet, and the first water outlet (415) is communicated with the first filtering space.

6. The hydrogen production gas-liquid separation system according to claim 5, wherein when the first inlet/outlet (413) is used as an inlet, the first inlet/outlet (413) communicates with an outlet of the cooler group; or, when the first inlet/outlet (413) is used as an outlet, the second inlet/outlet (414) is communicated with the outlet of the cooler group.

7. The hydrogen production gas-liquid separation system according to claim 5, wherein the first water outlet (415) is provided at a bottom of the housing (411), the first inlet (413) is provided at a top of the housing (411), and the second inlet (414) is provided at a side of the housing (411).

8. The hydrogen production gas-liquid separation system according to any one of claims 3 to 7, wherein the first micro-separator (41) further comprises a support structure (416), the support structure (416) being located inside the housing (411) and connected to the housing (411), the support structure (416) being provided at the bottom of the cartridge (412); or, the first separator group comprises a hydrogen separator (21) and an oxygen separator (22), the cooler group comprises a hydrogen cooler (31) and an oxygen cooler (32), the second separator group further comprises a second micro separator (42), a first inlet (413) or a second inlet (414) of the first micro separator (41) is communicated with an outlet of the hydrogen cooler (31), a first water outlet (415) of the first micro separator (41) is communicated with the hydrogen separator (21), a first inlet (413) or a second inlet (414) of the second micro separator (42) is communicated with an outlet of the oxygen cooler (32), and a first water outlet (415) of the second micro separator (42) is communicated with the oxygen separator (22).

9. The hydrogen producing gas-liquid separation system of claim 1, wherein the second separator set comprises a scrubber and a micro-separator, an inlet of the micro-separator being in communication with an outlet of the scrubber.

10. A hydrogen production system comprising a purification apparatus and a hydrogen production gas-liquid separation system as claimed in any one of claims 1 to 9, the outlet of the second separator set being in communication with the inlet of the purification apparatus.