CN116692773A - Hydrogen production equipment, gas-liquid separation device thereof and separation method of electrolyte and hydrogen - Google Patents

Hydrogen production equipment, gas-liquid separation device thereof and separation method of electrolyte and hydrogen Download PDF

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Publication number
CN116692773A
CN116692773A CN202310760819.7A CN202310760819A CN116692773A CN 116692773 A CN116692773 A CN 116692773A CN 202310760819 A CN202310760819 A CN 202310760819A CN 116692773 A CN116692773 A CN 116692773A
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China
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gas
electrolyte
hydrogen
flow
liquid separation
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CN202310760819.7A
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Chinese (zh)
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CN116692773B (en
Inventor
张正雄
叶垚
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Shanghai Lianfeng Gas Co ltd
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Shanghai Lianfeng Gas Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/50—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification
    • C01B3/52—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification by contacting with liquids; Regeneration of used liquids
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/02—Hydrogen or oxygen
    • C25B1/04—Hydrogen or oxygen by electrolysis of water
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
    • C25B15/083—Separating products
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
    • C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
    • C01B2203/0415—Purification by absorption in liquids
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

The application discloses hydrogen production equipment, a gas-liquid separation device and a separation method of electrolyte and hydrogen, wherein the gas-liquid separation device comprises a tank body and a flow-down component, an inlet is formed in the middle of the tank body, a hydrogen outlet is formed at the top of the tank body, a treatment cavity communicated with the inlet and the hydrogen outlet is also formed in the tank body, the flow-down component is formed in the treatment cavity and is kept above the inlet, the flow-down component forms a flow-down space and a flow-separation cavity in the treatment cavity positioned above the inlet, the flow-down component forms a gas-liquid primary separation space in the treatment cavity and positioned below the flow-down component, the flow-down component forms at least one communication hole and one communication channel, the flow-separation cavity is communicated with the flow-down space through at least one communication hole, the flow-separation cavity is communicated with the flow-separation cavity through the communication channel, and the flow-down space is communicated with the hydrogen outlet.

Description

Hydrogen production equipment, gas-liquid separation device thereof and separation method of electrolyte and hydrogen
Technical Field
The application relates to the field of hydrogen production equipment, in particular to hydrogen production equipment, a gas-liquid separation device thereof and a separation method of electrolyte and hydrogen.
Background
Hydrogen is currently widely used in various fields as a clean chemical gas. At present, most hydrogen production equipment adopts electrolyte to prepare hydrogen. The electrolyte can generate hydrogen in the process of being electrolyzed, and the electrolyte can flow along with the hydrogen, so that great trouble is brought to the purification of the hydrogen.
In the prior art, after the electrolyte is electrolyzed, a common gas-liquid separator is used for separating mixed fluid, and more vaporous electrolyte exists in the separated fluid, and the vaporous electrolyte flows along with hydrogen, especially in alkaline water electrolysis hydrogen production equipment. For this purpose, the fluid separated by the gas-liquid separator must be further washed by a washer to remove a small amount of electrolyte in the fluid or cooled by a cooler to retain the electrolyte in the fluid.
For example, chinese patent publication No. CN112755594a discloses a "gas-liquid separator", which enhances gas-liquid separation effect by providing functional members including a cyclone foam breaking device, a demisting separation device, a defoaming paddle, a foam buffer chamber, and the like in a cavity of the gas-liquid separator. The gas-liquid separator is effective in removing foam in the electrolyte mixed with gas and liquid, but the foam releases more mist droplets when broken, and the electrolyte in the mist droplets flows along with the gas because the fluid flowing through the gas-liquid separator has a certain flow rate in the hydrogen production equipment, so that the separation treatment of the fluid is needed to be continued for obtaining high-purity hydrogen. In other words, the gas-liquid separator in the prior art cannot obtain high purity hydrogen gas by one apparatus. And if a plurality of devices are employed to combine a plurality of processes, the occupation space of the devices tends to increase.
In addition, in order to separate the atomized electrolyte and the gaseous hydrogen, a wire mesh demister for removing the atomized electrolyte is usually disposed on a path through which the gas-liquid flows, and some fine electrolyte particles, especially alkaline microparticles, may remain on the wire mesh demister in addition to the atomized electrolyte, and if such microparticles are not removed timely, the wire mesh demister tends to be blocked by the liquid formed by the solid and the atomized electrolyte, thereby affecting the effect of gas-liquid separation.
Disclosure of Invention
An advantage of the present application is to provide a hydrogen production apparatus, a gas-liquid separation device thereof, and a separation method of an electrolyte and hydrogen gas, in which droplets and fine particles accumulated on a wire mesh demister can be automatically removed by a wire mesh dredging assembly.
Another advantage of the present application is to provide a hydrogen production apparatus, a gas-liquid separation device thereof, and a separation method of an electrolyte and hydrogen, wherein by using the gas-liquid separation device, the flow rate of hydrogen mixed with a vaporous electrolyte to be separated can be reduced, so that the electrolyte in the hydrogen mixed with the vaporous electrolyte is reduced to flow away with the gas, thereby improving the separation effect of the hydrogen and the electrolyte, and obtaining hydrogen with higher purity.
An advantage of the present application is to provide a hydrogen production apparatus, a gas-liquid separation device thereof, and a separation method of an electrolyte and hydrogen gas, wherein the gas-liquid separation device has a small volume, and can achieve efficient separation of hydrogen gas and an electrolyte by a single small volume of the gas-liquid separation device.
Another advantage of the present application is to provide a hydrogen production apparatus, a gas-liquid separation apparatus thereof, and a separation method of an electrolyte and hydrogen gas, wherein the gas-liquid separation apparatus realizes a separation process in which a single apparatus integrates a plurality of hydrogen gases and an electrolyte through a plurality of components arranged in a small space, thereby enabling an occupied space of the gas-liquid separation apparatus to be drastically reduced, and also having a good separation effect.
Another advantage of the present application is to provide a hydrogen production apparatus, a gas-liquid separation device thereof, and a method for separating an electrolyte from hydrogen, wherein the gas-liquid separation device is capable of washing volatilized hydrogen mixed with a mist electrolyte by clean water when separating hydrogen from the electrolyte, thereby retaining the electrolyte in the hydrogen mixed with the mist electrolyte.
Another advantage of the present application is to provide a hydrogen production apparatus, a gas-liquid separation device thereof, and a separation method of an electrolyte and hydrogen gas, wherein the gas-liquid separation device can automatically maintain clean water washing the electrolyte at a concentration containing a lower electrolyte, so that volatilization of the electrolyte with hydrogen gas in the clean water can be effectively reduced.
Another advantage of the present application is to provide a hydrogen production apparatus, a gas-liquid separation device thereof, and a separation method of an electrolyte and hydrogen, wherein the gas-liquid separation device can automatically maintain clean water washing the electrolyte at a lower temperature, so that volatilization of the electrolyte in the clean water along with hydrogen can be effectively reduced.
Another advantage of the present application is to provide a hydrogen production apparatus and a gas-liquid separation device thereof, and a separation method of an electrolyte and hydrogen gas, wherein the gas-liquid separation device is capable of maintaining the separated electrolyte at a low temperature, thereby preventing the separated electrolyte from being volatilized again to dissolve into the hydrogen mixed with the atomized electrolyte to be separated.
To achieve at least one of the above advantages, the present application provides a gas-liquid separation apparatus comprising:
a tank, wherein an inlet is formed in the middle of the tank, a hydrogen outlet is formed at the top of the tank, and a treatment cavity communicated with the inlet and the hydrogen outlet is also formed in the tank;
a downflow assembly, wherein the downflow assembly is formed in the process chamber and is maintained above the inlet, wherein the downflow assembly forms a downflow space and a baffle chamber in the process chamber located in an upper portion of the inlet, and the downflow assembly forms a gas-liquid preliminary separation space in the process chamber and below the downflow assembly, wherein the downflow assembly forms at least one communication hole and a communication passage, wherein the baffle chamber is disposed in communication with the downflow space through at least one of the communication holes, wherein the gas-liquid preliminary separation space is disposed in communication with the baffle chamber through the communication passage, wherein the downflow space is disposed in communication with the hydrogen outlet, and the downflow space and the baffle chamber are coaxially formed in the process chamber.
According to an embodiment of the application, the flow reducing assembly comprises a transverse partition wall and a partition cylinder, wherein the edges of the transverse partition wall are sealingly mounted to the inner wall of the tank forming the processing chamber, the partition cylinder has a vertical side wall and a top sealing wall, wherein the vertical side wall extends towards the top of the hydrogen outlet, wherein the top sealing wall is arranged to cover the top of the vertical side wall, wherein the vertical side wall forms the flow reducing space with the top sealing wall, the transverse partition wall and the inner wall of the tank forming the processing chamber in the upper space for holding the clean water, the bottom of the vertical side wall forms the communication hole, and the vertical side wall of the partition cylinder and the top sealing wall form the flow dividing chamber with the transverse partition wall.
According to an embodiment of the present application, the flow reducing assembly includes a communicating member, wherein a bottom of the communicating member is disposed at a middle portion of the lateral partition wall and extends toward the flow blocking chamber, and the communicating member forms the communicating passage at the middle portion, and the communicating member extends in a vertical direction and forms an air outlet in the flow blocking chamber at an end portion of the communicating member.
According to one embodiment of the application, the top of the communicating member is arranged to extend a predetermined height after passing through the top sealing wall, and is bent again to pass through the top sealing wall so that the air outlet is kept in the flow separation cavity from top to bottom.
According to one embodiment of the application, the gas-liquid separation device comprises a gas distribution plate, wherein the gas distribution plate is arranged opposite to the gas outlet.
According to an embodiment of the present application, the gas-liquid separation device includes an electrolyte retention assembly, wherein the electrolyte retention assembly includes a first cooling member, wherein the first cooling member includes a first heat exchange element, wherein the first heat exchange element is disposed in the down-flow space, and a first refrigerant inlet and a first refrigerant outlet are formed on the tank.
According to an embodiment of the present application, the gas-liquid separation device includes a liquid exchange assembly, the liquid exchange assembly includes at least one overflow pipe, the tank body forms at least one liquid exchange inlet communicating with the down-flow space, a vertical distance from a top end of the overflow pipe to the hydrogen outlet is greater than a vertical distance from a highest part of the communicating member to the hydrogen outlet, and a bottom of the overflow pipe extends to a bottom of the processing chamber of the tank body.
According to an embodiment of the present application, the gas-liquid separation device includes at least one wire mesh demister, wherein at least one wire mesh demister is disposed in the communication channel, and at least one wire mesh demister is disposed in the hydrogen outlet.
In accordance with another aspect of the present application, to achieve at least one of the above advantages, the present application provides a hydrogen production apparatus comprising:
at least one liquid supply assembly comprising an electrolytic cell and liquid supply means for supplying electrolyte to the electrolytic cell;
at least one electrolysis assembly for electrolyzing an electrolyte in the electrolytic cell; and
the gas-liquid separation device according to any one of the above, wherein the inlet is communicated with the electrolytic cell and is used for separating hydrogen mixed with vaporific electrolyte formed after electrolysis.
According to another aspect of the present application, to achieve at least one of the above advantages, the present application provides a separation method of an electrolyte and hydrogen gas, which is treated by the gas-liquid separation apparatus as described in any one of the above, wherein the separation method of hydrogen gas comprises the steps of:
introducing the hydrogen mixed with the atomized electrolyte into the treatment cavity through the inlet;
and the clean water in the down-flow space formed by the down-flow component counteracts the air pressure of part of the hydrogen mixed with the vaporific electrolyte so as to reduce the flow rate of the hydrogen mixed with the vaporific electrolyte flowing into the processing cavity and wash the hydrogen mixed with the vaporific electrolyte, wherein the down-flow component is arranged in the processing cavity and is positioned above the inlet.
Drawings
FIG. 1 shows a schematic diagram of a hydrogen plant of the present application.
Fig. 2 shows a perspective view of the gas-liquid separation device according to the present application.
Fig. 3 shows a top view of the gas-liquid separation device according to the present application.
Figure 4 shows a cross-section in the direction A-A in figure 3.
Fig. 5 shows an enlarged view of the portion C in fig. 4.
Fig. 6 is a perspective view showing a part of the structure of the gas-liquid separation device of the present application after being cut.
Fig. 7 shows a schematic view of a gas-liquid separation apparatus according to the present application in one state.
Fig. 8 shows a schematic view of another state of the gas-liquid separation device according to the present application.
Fig. 9 shows a cut-away perspective view of a second embodiment of the gas-liquid separation device according to the application.
Fig. 10 shows a top view of a second embodiment of the gas-liquid separation device according to the application.
Fig. 11 shows a cross-sectional view in the direction B-B of fig. 10.
Fig. 12 shows an enlarged view of the portion D in fig. 11.
Fig. 13 is a perspective view showing a part of the structure of a second embodiment of the gas-liquid separation apparatus of the present application.
Description of the embodiments
The following description is presented to enable one of ordinary skill in the art to make and use the application. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the application defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the application.
It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present application.
It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.
A hydrogen production apparatus according to a preferred embodiment of the present application, which can form hydrogen by electrolyzing an electrolyte, will be described in detail below with reference to fig. 1 to 8. The hydrogen plant includes at least one electrolysis assembly 200, at least one liquid supply assembly 300, and a gas-liquid separation device 400.
The liquid supply assembly 300 comprises an electrolytic cell and a liquid supply member for supplying electrolyte to the electrolytic cell, wherein the liquid supply member comprises a pump body and a pipeline. The electrolysis assembly 200 is configured to electrolyze an electrolyte disposed in the electrolytic cell to form hydrogen gas.
The gas-liquid separation device 400 is connected to the electrolytic cell, and is used for separating hydrogen gas which is formed by volatilizing the electrolytic cell during electrolysis and is mixed with vaporous electrolyte, and returning the separated electrolyte to the electrolytic cell.
Preferably, hydrogen gas mixed with a mist electrolyte formed by volatilization during electrolysis is rapidly supplied to the gas-liquid separation device 400 through a pump body 800.
Specifically, the gas-liquid separation device 400 includes a tank 10, wherein an inlet 101 is formed in the middle of the tank 10, a hydrogen outlet 102 is formed at the top of the tank 10, and a processing chamber 103 is further formed in the tank 10 and is in communication with the inlet 101 and the hydrogen outlet 102.
The gas-liquid separation apparatus 400 further comprises a flow-down assembly 20, wherein the flow-down assembly 20 is formed in the process chamber 103 and is held above the inlet 101, wherein the flow-down assembly 20 forms a flow-down space 10301 and a flow-blocking space 10302 in the process chamber 103 located at an upper portion of the inlet 101, and the flow-down assembly 20 is disposed in the process chamber 103 and forms a gas-liquid primary separation space 10303 therebelow.
The flow-down assembly 20 forms at least a communication hole 201 and a communication passage 202, wherein the flow-blocking chamber 10302 is provided to communicate with the flow-down space 10301 through at least one of the communication holes 201, wherein the gas-liquid preliminary separation space 10303 communicates with the flow-blocking chamber 10302 through the communication passage 202, wherein the flow-down space 10301 is provided to communicate with the hydrogen outlet 102.
It is worth mentioning that a predetermined amount of clean water is previously contained in the down-flow space 10301, wherein the communication hole 201 is provided so as to be submerged by the clean water. Thus, when the hydrogen gas mixed with the atomized electrolyte to be separated enters the processing chamber 103 through the inlet 101, the fluid having a predetermined flow rate flows to the flow separation chamber 10302 through the communication passage 202 after being primarily separated in the gas-liquid primary separation space 10303. And since the clean water in the down-flow space 10301 blocks the passage through which the hydrogen gas mixed with the mist electrolyte flows, the liquid level of the clean water in the down-flow space 10301 rises, and the weight of the clean water is adapted to expose the communication hole 201 after the liquid level in the down-flow space 10301 rises, so that the hydrogen gas mixed with the mist electrolyte can be continuously introduced into the clean water located in the down-flow space 10301 via the communication hole 201 to be washed. In this way, the flow path of the hydrogen gas of the atomized electrolyte is blocked by the clean water, so that the flow rate of the hydrogen gas of the atomized electrolyte flowing into the processing chamber 103 can be reduced and can be simultaneously washed, and therefore, after the hydrogen gas mixed with the atomized electrolyte flows into the down-flow space 10301, the flow rate is rapidly reduced, so that the electrolyte in the hydrogen gas mixed with the atomized electrolyte can be slowly mixed into the clean water, and meanwhile, the hydrogen gas tends to move upwards, so that the hydrogen gas after washing can flow out from the hydrogen gas outlet 102, so as to obtain the hydrogen gas after separation and purification. It is worth mentioning that when the atomized electrolyte is washed by the clean water, the atomized electrolyte breaks and dilutes under the pressure of the clean water, and the flow rate is reduced, so that the gas flowing upwards after the clean water is high-purity hydrogen.
More specifically, the downflow assembly 20 includes a lateral partition wall 21 and a separation cylinder 22, wherein the edge of the lateral partition wall 21 is sealingly mounted to the inner wall of the tank 10 forming the process chamber 103 to separate the process chamber 103 into an upper space 10304 and the gas-liquid primary separation space 10303.
The separation cylinder 22 has a vertical side wall 221 and a top sealing wall 222, wherein the vertical side wall 221 extends towards the top of the hydrogen gas outlet 102, wherein the top sealing wall 222 is arranged to cover the top of the vertical side wall 221, such that the vertical side wall 221 forms the down-flow space 10301 with the top sealing wall 222, the lateral separation wall 21 and the inner wall of the tank 10 forming the treatment chamber 103 in the upper space 10304 for holding the fresh water.
Further, the communication hole 201 is formed at the bottom of the vertical sidewall 221. Preferably, the communication holes 201 are uniformly arranged in the circumferential direction at the bottom side wall of the vertical side wall 221.
It is worth mentioning that the flow-blocking chamber 10302 is formed between the vertical side wall 221 and the top sealing wall 222 of the partition cylinder 22 and the lateral partition wall 21. At the same time, the communication passage 202 communicating with the flow blocking chamber 10302 is formed in the middle of the lateral partition wall 21.
It will be appreciated by those skilled in the art that by coaxially forming the down-flow space 10301 and the flow blocking chamber 10302 in the process chamber 103 and radially arranging the down-flow space 10301 and the flow blocking chamber 10302, not only can gas-liquid separation be achieved, but also the space occupied by the gas-liquid separation device 400 can be effectively reduced by integrating the gas-liquid separation and washing components into the process chamber 103.
In another preferred embodiment, the down-flow assembly 20 further includes a communication member 23, wherein the bottom of the communication member 23 is disposed at the middle of the lateral partition wall 21 and extends toward the flow blocking chamber 10302, and the communication member 23 forms the communication passage 202 at the middle. The communication member 23 extends in the vertical direction to form an air outlet 2301 in the flow blocking chamber 10302 at the end of the communication member 23.
That is, the air outlet 2301 is provided at a position lower than the top seal wall 222.
While in another embodiment, the top of the communicating member 23 is disposed through the top sealing wall 222 and then continues to extend for a predetermined height, and is bent again through the top sealing wall 222 so that the air outlet 2301 is maintained in the flow blocking chamber 10302 from top to bottom. It is worth mentioning that the top sealing wall 222 and the communication member 23 remain sealed therebetween.
It is worth mentioning that the vertical distance from the top of the communication member 23 to the hydrogen outlet 102 is smaller than the vertical distance from the top of the fresh water level in the down-flow space 10301 to the hydrogen outlet 102. In this way, when the air pressure flowing into the processing chamber 103 is reduced, the clean water in the down-flow space 10301 can be effectively prevented from flowing backward to the flow blocking chamber 10302.
Preferably, the gas-liquid separation device 400 further comprises a gas distribution plate 500, wherein the gas distribution plate 500 is disposed opposite to the gas outlet 2301. In this way, the hydrogen mixed with the atomized electrolyte can be uniformly guided to the communication holes 201 at the bottom of the vertical sidewall 221 by the gas distribution plate 500, so that the clean water in the down-flow space 10301 is prevented from flowing back into the flow separation chamber 10302 through the communication holes 201 due to uneven gas distribution, and the effect of the electrolyte in the washed hydrogen mixed with the atomized electrolyte is ensured.
Preferably, the gas-liquid separation apparatus 400 further includes an electrolyte retention assembly 30, wherein the electrolyte retention assembly 30 includes a first cooling member 31, wherein the first cooling member 31 includes a first heat exchanger 311, wherein the first heat exchanger 311 is disposed in the down-flow space 10301, so that the temperature of the clean water in the down-flow space 10301 can be reduced by heat exchange, and the electrolyte in the hydrogen mixed with the mist electrolyte can be condensed while being retained by the clean water in the down-flow space 10301, and at the same time, the volatilization rate of the electrolyte dissolved in the clean water can be reduced.
Preferably, the first cooling member 31 further includes a first guiding pump 312 and a first condenser 313, wherein the first guiding pump 312, the first condenser 313 and the first cooling member 311 are communicated with each other, and the first guiding pump 312 is configured to guide the cooling medium to flow to the first heat exchanging element 311 after being continuously cooled by the first condenser 313, so that the first heat exchanging element 311 can maintain the fresh water temperature in the down-flow space 10301 at a temperature suitable for condensing the electrolyte in the hydrogen gas mixed with the mist electrolyte by heat exchanging. Preferably, the first cooling member 31 is disposed in the processing chamber 103, and a first refrigerant inlet 31101 and a first refrigerant outlet 31102 are formed on the tank 10. The first refrigerant inlet 31101 and the first refrigerant outlet 31102 are connected to the first guide pump 312 and the first condenser 313.
Further, the gas-liquid separation device 400 further comprises a liquid exchange assembly 40, wherein the liquid exchange assembly 40 comprises at least one circulation pump 41 and a set of circulation pipes 42. The gas-liquid separation device 400 forms a liquid exchange inlet 401 communicating with the down-flow space 10301 and a liquid exchange outlet communicating with the down-flow space 10301. The circulation pump 41 is connected to a set of circulation pipes 42, wherein one circulation pipe 42 is connected to the fresh water source through the liquid exchange inlet 401, and one circulation pipe 42 is connected to the circulation pump 41 through the liquid exchange outlet, so as to guide out the liquid in the down-flow space 10301. In a preferred embodiment, both the liquid exchange inlet 401 and the liquid exchange outlet are formed by the tank 10 forming the upper space 10304.
In this way, when the clean water in the down-flow space 10301 is washed with the hydrogen mixed with the atomized electrolyte, the electrolyte with a lower concentration content can still be maintained, and further, excessive electrolyte can be effectively prevented from being mixed into the washed hydrogen again along with volatilization of the clean water.
In particular, the hydrogen gas with higher purity can be separated by the cooperation of the liquid exchange module 40 and the first cooling member 31 of the electrolyte retention module 30.
In another embodiment, the liquid exchange assembly 40 includes at least one overflow tube 43. In this embodiment, the tank 10 forms at least one liquid exchange inlet 401 communicating with the down-flow space 10301.
In the present embodiment, the overflow pipe 43 is provided through the lateral partition wall 21, and the top end of the overflow pipe 43 is spaced from the hydrogen outlet 102 by a vertical distance greater than that of the highest portion of the communication member 23 from the hydrogen outlet 102. In this way, during the process of introducing the clean water into the down-flow space 10301, the liquid level of the clean water located in the down-flow space 10301 is not higher than the top end of the overflow pipe 43, so that the clean water can be effectively prevented from flowing back to the flow-blocking cavity 10302 due to the excessive liquid level caused by the excessive dissolved electrolyte, and the communication hole 201 is prevented from being submerged.
The bottom of the overflow pipe 43 extends to the bottom of the treatment chamber 103 of the tank 10.
In one embodiment, the gas-liquid separation device 400 includes a primary separator 50, wherein one end of the primary separator 50 forms the inlet 101 and is retained in the process chamber 103 extending in a lateral direction. The side of the primary separator 50 is provided with a set of vent holes 501. It should be noted that, when the hydrogen gas mixed with the atomized electrolyte enters the primary separator 50 through the inlet 101, the atomized electrolyte in the hydrogen gas mixed with the atomized electrolyte is blocked and cooled by the wall of the primary separator 50, and drops are formed in the primary separator 50, and the liquid passes through the vent holes 501 and falls to the bottom of the processing chamber 103.
Since the vent hole 501 is provided at the side of the primary separator 50, the droplets slide away from the vent hole 501 due to gravity, thereby effectively preventing the droplets from being accumulated in the vent hole 501 to clog the vent hole 501.
Preferably, the electrolyte retaining assembly 30 further includes a second cooling member 32, the second cooling member 32 includes a second heat exchanger 321, wherein the second heat exchanger 321 of the second cooling member 32 is disposed at the bottom of the processing chamber 103, so as to cool the liquid electrolyte deposited at the bottom of the processing chamber 103, thereby effectively preventing the electrolyte dropped at the bottom of the processing chamber 103 from being volatilized again and mixed into the gas.
Specifically, the second cooling member 32 includes a second guiding pump 322 and a second condenser 323, wherein the second guiding pump 322, the second condenser 323 and the second cooling member 321 are mutually communicated, and the second guiding pump 322 is configured to guide the cooling medium to flow to the second heat exchanging element 321 after being cooled by the second condenser 323, so that the second heat exchanging element 321 can keep the temperature of the electrolyte in the bottom of the processing chamber 103 below the volatilizing temperature by heat exchanging. Preferably, the second cooling member 32 is disposed at the bottom of the processing chamber 103, and a second refrigerant inlet 32101 and a second refrigerant outlet 32102 are formed on the tank 10. The second refrigerant inlet 32101 and the second refrigerant outlet 32102 are connected to the second guide pump 322 and the second condenser 323.
Preferably, the tank 10 forms an electrolyte outlet 104 at the bottom of the processing chamber 103, which communicates with the processing chamber 103.
It should be noted that the hydrogen outlet 102 is connected to a hydrogen tank. The electrolyte outlet 104 and the change assembly 40 are both connected to the liquid supply member of the liquid supply assembly 300. Thus, not only can the separation of hydrogen and the atomized electrolyte be realized, but also the recycling of the electrolyte can be realized.
More preferably, the gas-liquid separation device 400 further includes at least one wire mesh demister 60, wherein at least one wire mesh demister 60 is disposed in the communication channel 202. Preferably, at least one wire mesh demister 60 is disposed at the hydrogen outlet 102.
It will be appreciated by those skilled in the art that the wire mesh demister 60 is capable of initially intercepting the atomized electrolyte. Because the hydrogen outlet 102 is also provided with the wire mesh demister 60, when the hydrogen with higher purity is obtained through separation, the obtained hydrogen with higher purity can be intercepted again, so that the purity of the obtained hydrogen is further improved.
Referring to fig. 9 to 13, in a modified embodiment, the gas-liquid separation apparatus 400 further includes a screen de-foaming assembly 70, wherein at least one of the screen de-foaming devices 60 is movably mounted to the communication passage 202 through the screen de-foaming assembly 70. Specifically, the wire mesh mist eliminator 60 is movably mounted to the communication passage 202 formed by the communication member 23 through the wire mesh-dredging assembly 70.
Referring particularly to fig. 11-13, the screen opening assembly 70 includes a guide bar 71, an elastic member 72, and a stopper 73. The guide rod 71 is provided to extend in the axial direction of the communication passage 202, and the guide rod 71 has a high end portion 711 and a low end portion 712. Meanwhile, the inner wall of the communication channel 202 forms a reducing portion 24, wherein the cross-sectional diameter of the reducing portion 24 is larger than that of other portions of the communication channel 202.
The stopper 73 is fixed to the communication passage 202, and at least one communication window 7301 is formed in the middle of the stopper 73 to communicate with the communication passage 202. The lower end 712 of the guide rod 71 is pressed against the stopper 73. Further, a mounting member 80 is provided in a portion of the communication passage 202 formed by the diameter-changing portion 24, wherein a mounting cavity 801 is formed in a central portion of the mounting member 80 downward in the axial direction, wherein the Gao Duanbu 711 of the guide rod 71 is slidably inserted into the mounting cavity 801, wherein the elastic member 72 is provided in the mounting cavity 801 between the mounting member 80 and the high end 711 of the guide rod 71 so that the guide rod 71 tends to move downward in the axial direction to press against the stopper 73. Meanwhile, at least one wire mesh mist eliminator 60 is mounted to the guide rod 71 and a part thereof is located at the diameter-changing portion 24 of the communication passage 202. In addition, at least one window 802 communicating with the communication channel 202 is formed in the middle of the mounting member 80.
During normal gas-liquid separation, the wire mesh demister 60 located on the guide rod 71 can be held in the communication channel 202, and hydrogen gas mixed with atomized electrolyte can be filtered by the wire mesh demister 60 located on the guide rod 71 when passing through the communication channel 202. However, as the liquid deposited on the wire mesh demister 60 increases, fine particles in the electrolyte accumulate, once the wire mesh demister 60 on the guide rod 71 is partially blocked, the air pressure in the air-liquid primary separation space 10303 increases sharply, while the air pressure in the flow blocking chamber 10302 decreases still, so that the wire mesh demister 60 is pushed to drive the guide rod 71 to slide along the installation chamber 801, so that the lower end 712 of the guide rod 71 moves away from the stopper 73, and so that the wire mesh demister 60 on the guide rod 71 moves completely to the communication channel 202 formed by the reducing portion 24, and as a result, the air pressure in the air-liquid primary separation space 10303 rapidly passes through the gap between the wire mesh demister 60 and the inner wall of the reducing portion 24, and accordingly, the air pressure in the wire mesh demister 60 automatically returns to the lower end portion 71, and the air pressure in the air-liquid primary separation space 10303 automatically returns to the communication channel 202, so that the fine particles in the wire mesh demister can be automatically removed by the air pressure in the lower end portion 71, and the air pressure in the air-liquid primary separation space can automatically flow through the communication channel 202, and the air pressure in the air-liquid primary separator can automatically drop separator 71 can be removed by the small diameter of the wire mesh demister 60, but also can effectively prevent the gas-liquid separator from being unable to operate normally due to clogging of the wire mesh demister 60 located in the communication channel 202.
Preferably, the screen opening assembly 70 further includes a guide stop 74, wherein the guide stop 74 has at least one window 7401 in communication with the communication channel 202. The guide stopper 74 is mounted to the lower end portion 712 of the guide rod 71, and the outer wall abuts against the inner wall forming the communication passage 202, so that the guide rod 71 is kept in the moving direction in the axial direction when moving.
Referring to fig. 9 to 11, in a modified embodiment, the gas-liquid separation device 400 includes a primary separation member 50 and is configured to form a spiral body having a gradually increasing cross-sectional size and spirally rising along the inner wall of the treatment chamber 103 along the tank 10. The spiral body is disposed in the gas-liquid primary separation space 10303 and is disposed from bottom to top, and forms a spiral primary separation channel 5001, and an upflow channel 5002 having a cross-sectional dimension gradually decreasing from bottom to top is formed in the middle of the spiral body.
It should be noted that the inlet 101 is disposed to communicate with the bottom end of the spiral primary separation channel 5001 from the tangential direction of the tank 10, so that, after the hydrogen mixed with the atomized electrolyte enters from the inlet 101, most of the hydrogen mixed with the atomized electrolyte can bypass along the spiral primary separation channel 5001, thereby prolonging the time and path of the primary separation of the hydrogen mixed with the atomized electrolyte, so that the electrolyte in the hydrogen mixed with the atomized electrolyte can condense for a long time to flow along the spiral primary separation channel 5001 to the upflow channel 5002, and fall from the upflow channel 5002 to the bottom of the treatment cavity 103.
Preferably, the gas-liquid separation device further comprises a first separator 91 and a second separator 92, wherein the first separator 91 is disposed in the process chamber 103 at a position lower than the inlet 101, and wherein the second separator 92 is disposed in the gas-liquid primary separation space 10303 at a position higher than the top of the screw.
A middle passage 9101 is formed in the middle of the first partition 91, wherein the middle passage 9101 is disposed to extend into the electrolyte at the bottom of the processing chamber 103. The first separator 91 is provided to reduce the size of the opening for evaporation of the electrolyte deposited on the bottom of the processing chamber 103, thereby reducing the evaporation of the electrolyte. As shown in fig. 11, the first partition 91 is preferably provided with a middle portion recessed toward the bottom of the processing chamber 103, so that the liquid electrolyte condensed in the hydrogen gas mixed with the atomized electrolyte entering the processing chamber 103 can flow intensively to the bottom of the processing chamber 103 through the middle passage 9101 of the first partition 91.
The middle portion of the second partition 92 forms a middle passage 9201 in the axial direction, wherein the middle passage 9201 is communicated with the rising flow passage 5002 from top to bottom, and furthermore, the middle portion of the second partition 92 forms a negative pressure passage 9202 in the axial direction, wherein the negative pressure passage 9202 is also communicated with the rising flow passage 5002, wherein the middle passage 9201 is disposed coaxially with the rising flow passage 5002, and the negative pressure passage 9202 is disposed offset from the axial direction of the rising flow passage 5002, and the bottom portion of the negative pressure passage 9202 extends downward to the horizontal plane where the inlet 101 is located, so that the bottom portion of the negative pressure passage 9202 is located on the path of the gas entering from the inlet 101.
It should be noted that, when the gas is rapidly introduced from the inlet 101 by the pump body 800, since the flow rate is high and the bottom opening of the negative pressure channel 9202 is located in the tangential direction of the gas entering the inlet 101, the flow rate of the gas at the bottom opening of the negative pressure channel 9202 is high, and the flow rate is high, the pressure is reduced according to the venturi effect, so that a negative pressure is formed, and thus, the liquid drops or fine particles deposited on the second separator 92 can be sucked downward, so that the liquid drops or fine particles deposited on the second separator 92 can drop to the bottom of the processing chamber 103 through the negative pressure channel 9202.
Further, the top of the upflow channel 5002 of the second separator 92 is blocked, and a top sidewall extends radially to form a plurality of air outlet holes 9203. In this way, the hydrogen gas mixed with the atomized electrolyte needs to be redirected when passing through the second separator 92, so that the electrolyte in the hydrogen gas mixed with the atomized electrolyte can be trapped on top of the second separator 92 more. In turn, due to the negative pressure created by the negative pressure channel 9202, the trapped electrolyte can be sucked to the bottom of the process chamber 103.
According to another aspect of the present application, a method for separating hydrogen according to a preferred embodiment of the present application will be described in detail below, wherein the method for separating hydrogen comprises the steps of:
s1001, introducing the hydrogen mixed with the atomized electrolyte into the processing cavity 103 through the inlet 101; and
s1002, counteracting the air pressure of the hydrogen mixed with the atomized electrolyte by the clean water in the down-flow space 10301 formed by the down-flow component 20 to reduce the flow rate of the hydrogen mixed with the atomized electrolyte flowing into the processing chamber 103 and wash the hydrogen mixed with the atomized electrolyte, wherein the down-flow component 20 is disposed above the inlet 101 in the processing chamber 103.
Preferably, the separation method of hydrogen gas comprises the following steps:
s1003, maintaining the temperature of the clean water at a preset low temperature through the first cooling member 31 so as to reduce volatilization of the electrolyte dissolved in the clean water.
Preferably, the separation method of hydrogen gas comprises the following steps:
s1004, maintaining the concentration of the clean water containing electrolyte in the down-flow space 10301 at a preset low concentration by the liquid exchange assembly 40.
It will be appreciated by persons skilled in the art that the embodiments of the application described above and shown in the drawings are by way of example only and are not limiting. The advantages of the present application have been fully and effectively realized. The functional and structural principles of the present application have been shown and described in the examples and embodiments of the application may be modified or practiced without departing from the principles described.

Claims (10)

1. The gas-liquid separation device, its characterized in that, gas-liquid separation device includes:
a tank, wherein an inlet is formed in the middle of the tank, a hydrogen outlet is formed at the top of the tank, and a treatment cavity communicated with the inlet and the hydrogen outlet is also formed in the tank;
a downflow assembly, wherein the downflow assembly is formed in the process chamber and is maintained above the inlet, wherein the downflow assembly forms a downflow space and a baffle chamber in the process chamber located in an upper portion of the inlet, and the downflow assembly forms a gas-liquid preliminary separation space in the process chamber and below the downflow assembly, wherein the downflow assembly forms at least one communication hole and a communication passage, wherein the baffle chamber is disposed in communication with the downflow space through at least one of the communication holes, wherein the gas-liquid preliminary separation space is disposed in communication with the baffle chamber through the communication passage, wherein the downflow space is disposed in communication with the hydrogen outlet, and the downflow space and the baffle chamber are coaxially formed in the process chamber.
2. The gas-liquid separation apparatus according to claim 1, wherein the downflow assembly includes a lateral partition wall and a partition tube, wherein a rim of the lateral partition wall is sealingly mounted to an inner wall of the tank forming the process chamber, the partition tube has a vertical side wall and a top seal wall, wherein the vertical side wall extends toward the hydrogen outlet at the top, wherein the top seal wall is provided to cover a top of the vertical side wall, wherein the downflow space is formed between the vertical side wall and the top seal wall, the lateral partition wall, and the inner wall of the tank forming the process chamber at the upper space for containing the clean water, the communication hole is formed at a bottom of the vertical side wall, and the separation chamber is formed between the vertical side wall and the top seal wall of the partition tube and the lateral partition wall.
3. The gas-liquid separation apparatus according to claim 2, wherein the flow-down assembly includes a communicating member, wherein a bottom portion of the communicating member is provided in a middle portion of the lateral dividing wall and extends toward the flow-blocking chamber, and the communicating member forms the communicating passage in the middle portion, and the communicating member extends in a vertical direction and forms an air outlet in the flow-blocking chamber at an end portion thereof.
4. A gas-liquid separation apparatus according to claim 3, wherein the top of the communicating member is provided through the top sealing wall and then continues to extend a predetermined height, and is bent again through the top sealing wall so that the gas outlet is held in the flow blocking chamber from top to bottom.
5. The gas-liquid separation apparatus according to claim 3 or 4, wherein the gas-liquid separation apparatus comprises a gas distribution plate, wherein the gas distribution plate is disposed opposite to the gas outlet.
6. The gas-liquid separation apparatus according to any one of claims 1 to 4, wherein the gas-liquid separation apparatus comprises an electrolyte retention assembly, wherein the electrolyte retention assembly comprises a first cooling member, wherein the first cooling member comprises a first heat exchange member, wherein the first heat exchange member is disposed in the down-flow space, and wherein a first refrigerant inlet and a first refrigerant outlet are formed on the tank.
7. The gas-liquid separation apparatus according to any one of claims 1 to 4, wherein the gas-liquid separation apparatus comprises a liquid exchange assembly including at least one overflow pipe, the tank body forms at least one liquid exchange inlet communicating with the down-flow space, a vertical distance from a top end of the overflow pipe to the hydrogen outlet is greater than a vertical distance from a highest portion of the communicating member to the hydrogen outlet, and a bottom of the overflow pipe extends to a bottom of the processing chamber of the tank body.
8. A gas-liquid separation apparatus according to any one of claims 1 to 4, wherein the gas-liquid separation apparatus comprises at least one wire mesh demister, wherein at least one wire mesh demister is provided in the communication channel, and at least one wire mesh demister is provided in the hydrogen outlet.
9. Hydrogen production apparatus, characterized in that it comprises:
at least one liquid supply assembly comprising an electrolytic cell and liquid supply means for supplying electrolyte to the electrolytic cell;
at least one electrolysis assembly for electrolyzing an electrolyte in the electrolytic cell; and
the gas-liquid separation apparatus according to any one of claims 1 to 8, wherein the inlet is in communication with the electrolytic cell for separating hydrogen gas mixed with a mist electrolyte formed after electrolysis.
10. Method for separating an electrolyte from hydrogen, characterized in that it is treated by a gas-liquid separation device according to any one of claims 1 to 8, wherein the method for separating hydrogen comprises the steps of:
introducing the hydrogen mixed with the atomized electrolyte into the treatment cavity through the inlet;
and the clean water in the down-flow space formed by the down-flow component counteracts the air pressure of part of the hydrogen mixed with the vaporific electrolyte so as to reduce the flow rate of the hydrogen mixed with the vaporific electrolyte flowing into the processing cavity and wash the electrolyte in the hydrogen mixed with the vaporific electrolyte, wherein the down-flow component is arranged in the processing cavity and is positioned above the inlet.
CN202310760819.7A 2023-06-27 2023-06-27 Hydrogen production equipment, gas-liquid separation device thereof and separation method of electrolyte and hydrogen Active CN116692773B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007169072A (en) * 2005-12-19 2007-07-05 National Institute Of Advanced Industrial & Technology Apparatus and method for producing hydrogen
CN102754266A (en) * 2010-02-23 2012-10-24 格雷特波因特能源公司 Integrated hydromethanation fuel cell power generation
JP2015059263A (en) * 2013-09-20 2015-03-30 株式会社神鋼環境ソリューション Hydrogen-oxygen generator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007169072A (en) * 2005-12-19 2007-07-05 National Institute Of Advanced Industrial & Technology Apparatus and method for producing hydrogen
CN102754266A (en) * 2010-02-23 2012-10-24 格雷特波因特能源公司 Integrated hydromethanation fuel cell power generation
JP2015059263A (en) * 2013-09-20 2015-03-30 株式会社神鋼環境ソリューション Hydrogen-oxygen generator

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