Hydrogen production electrolytic cell with function of separating hydrogen from oxygen

Abstract

The utility model relates to the technical field of hydrogen production through water electrolysis, in particular to a hydrogen production electrolytic bath with a function of separating hydrogen from oxygen, which comprises a bracket structure, an electrolytic bath main body is sleeved in the middle of the bracket structure and comprises a diaphragm, one side of the diaphragm is coated with an iridium coating, and the other side of the diaphragm is coated with a platinum coating. Screen frames are attached to the two sides of the diaphragm at intervals by the sealing washers, cylinder frames are attached to one sides of the screen frames at intervals by the sealing washers, electrode plates are attached to one sides of the cylinder frames at intervals by the sealing washers, electrolyte through holes are formed in the lower edges of the electrode plates in a penetrating mode, gaskets are attached to one sides of the electrode plates, and through-flow openings are fixedly formed in the lower edges of the surfaces of one sides of the gaskets; and the outer surface of the through-flow opening and the inner wall of the electrolyte through hole are mutually sleeved and attached, and a one-way valve is fixedly installed in the through-flow opening. According to the utility model, part of oxygen which is dissolved in the electrolyte and enters the cathode end from the through hole at the diaphragm is carried away through the flowing electrolyte, and meanwhile, hydrogen at the cathode end is prevented from entering the anode end from the through hole.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production by electrolysis of water, in particular to a hydrogen production electrolytic cell with the function of separating hydrogen from oxygen. Background Art

[0002] Hydrogen energy is an ideal clean energy with huge development potential. The use of hydrogen energy needs to start with hydrogen production. The hydrogen production process is divided into gray hydrogen, blue hydrogen and green hydrogen according to the carbon emission intensity. Green hydrogen is produced by electrolyzing water in an electrolyzer and is a renewable energy source. The original intention of the development of the hydrogen energy industry is zero carbon or low carbon emissions. Therefore, green hydrogen produced by electrolyzing water is the development direction of the future energy industry.

[0003] In the current process of producing hydrogen by electrolysis of water, the oxygen produced as a by-product based on the electrolysis of water reaction does not receive much attention and is not treated. This will cause some other gas molecules to be mixed into the oxygen, affecting the purity of the oxygen, and causing the produced oxygen to be directly discharged as waste. Utility Model Content

[0004] The purpose of the utility model is to provide a hydrogen production electrolyzer with the function of separating hydrogen from oxygen, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A hydrogen production electrolyzer with a function of separating hydrogen from oxygen comprises a support structure, wherein an electrolyzer body is sleeved in the middle of the support structure, wherein the electrolyzer body comprises a diaphragm, wherein one side of the diaphragm is coated with an iridium coating, and the other side of the diaphragm is coated with a platinum coating, mesh frames are bonded to both sides of the diaphragm with sealing gaskets as intervals, a cylinder frame is bonded to one side of the mesh frame with sealing gaskets as intervals, an electrode plate is bonded to one side of the cylinder frame with sealing gaskets as intervals, an electrolyte through hole is inserted at the lower edge of the electrode plate, a gasket is bonded to one side of the electrode plate, a flow port is fixedly installed at the lower edge of one side of the gasket surface, the outer surface of the flow port and the inner wall of the electrolyte through hole are sleeved and bonded to each other, and a one-way valve is fixedly installed inside the flow port.

[0007] Furthermore, the support structure includes six guide shafts, both ends of which are inserted and sleeved with the edges of the end plates, a threaded section at one end of the guide shaft passes through the end plate and is screwed with a nut, and a threaded section at the other end of the guide shaft passes through another end plate and a washer and is screwed with a nut.

[0008] Furthermore, a base is fixedly installed on the bottom side of the end plate, a flow groove is opened on the lower edge of the inner surface of the end plate, an electrolyte interface connected to the flow groove is fixedly installed on the lower edge of the outer surface of the end plate, and an exhaust port is fixedly installed on the upper edge of the outer surface of the end plate.

[0009] Furthermore, a multi-layer net is fixedly installed on one opening inside the net frame, and a titanium felt is fixedly installed on one surface of the multi-layer net.

[0010] Furthermore, a gas channel is provided on the upper edges of the two groups of the cylinder frame, the electrode plate, and the sealing gaskets and gaskets between the cylinder frame and the electrode plate, one end of the gas channel is opened on the upper inner wall of the cylinder frame, an oxygen selection filter block is fixedly installed at the opening of the gas channel on the side where the iridium coating is located, and a hydrogen selection filter block is fixedly installed at the opening of the gas channel on the side where the platinum coating is located.

[0011] Furthermore, the two groups of sealing gaskets, mesh frames, cylinder frames, electrode plates and gaskets are interlaced and spliced ​​with each other through guide shafts.

[0012] Furthermore, the flow groove is communicated with the flow port, and one end of the gas channel is communicated with the exhaust port.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. Connect the electrode plate electrical terminal on the side where the iridium coating is located to the power supply anode wire, and connect the electrode plate electrical terminal on the side where the platinum coating is located to the power supply cathode wire. Pass the electrolyte into the electrolytic cell body from the flow port at the anode end of the electrolytic cell body, pass through the electrolyte through hole opened at the lower edge of the diaphragm to enter the cathode end of the electrolytic cell body, and be discharged from the flow port at the cathode end. The flow direction of the electrolyte is limited by a one-way valve. The through hole at the lower edge of the diaphragm is sealed by the electrolyte to reduce the amount of oxygen entering the cathode end. An external electrolyte circulation system is connected. The flowing electrolyte carries away part of the oxygen dissolved in the electrolyte and enters the cathode end through the through hole at the diaphragm, and then re-enters the anode end through the external circulation of the electrolyte, while preventing the hydrogen at the cathode end from entering the anode end from the through hole, and purifying the collected hydrogen and oxygen.

[0015] 2. The gasket and the flow port cover the outer surface of the electrode plate and the inner wall of the electrolyte through hole to prevent the water molecules in the electrolyte from contacting the electrode plate in advance to cause electrolysis reaction, so that the electrolysis reaction can only occur in the anode chamber and the cathode chamber, so that hydrogen and oxygen can quickly contact the gas channel opening and smoothly enter the two sets of gas channels, thereby improving work efficiency.

[0016] 3. An oxygen selective permeable membrane is installed inside the oxygen selective filter block, and a hydrogen selective permeable membrane is installed inside the hydrogen selective filter block. The oxygen selective permeable membrane and the hydrogen selective permeable membrane are used as the last layer of protection to filter out other gases to ensure that the recovered hydrogen and oxygen have sufficient purity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the support structure of the utility model;

[0019] Figure 3 It is a cross-sectional view of the main body of the electrolytic cell in the utility model;

[0020] Figure 4 This is a disassembled diagram of the main body of the electrolytic cell in the utility model.

[0021] In the figure: 1. support structure; 101. guide shaft; 102. end plate; 103. nut; 104. washer; 105. base; 106. flow channel; 107. electrolyte interface; 108. exhaust port; 2. electrolytic cell body; 201. diaphragm; 202. iridium coating; 203. platinum coating; 204. sealing gasket; 205. mesh frame; 206. multi-layer mesh; 207. titanium felt; 208. cylinder frame; 209. electrode plate; 210. electrolyte through hole; 211. gasket; 212. flow port; 213. one-way valve; 214. oxygen selection filter block; 215. gas channel; 216. hydrogen selection filter block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figures 1 to 4In an embodiment of the utility model, a hydrogen production electrolyzer with the function of separating hydrogen from oxygen comprises a support structure 1, an electrolyzer body 2 is sleeved in the middle of the support structure 1, the electrolyzer body 2 comprises a diaphragm 201, one side of the diaphragm 201 is coated with an iridium coating 202, the other side of the diaphragm 201 is coated with a platinum coating 203, both sides of the diaphragm 201 are bonded with a mesh frame 205 with a sealing gasket 204 as an interval, one side of the mesh frame 205 is bonded with a cylinder frame 208 with a sealing gasket 204 as an interval, one side of the cylinder frame 208 is bonded with an electrode plate 209 with a sealing gasket 204 as an interval, the lower edge of the electrode plate 209 is interspersed with an electrolyte through hole 210, and one side of the electrode plate 209 is bonded with There is a gasket 211, and a flow port 212 is fixedly installed on the lower edge of one side surface of the gasket 211. The outer surface of the flow port 212 is sleeved and fitted with the inner wall of the electrolyte through hole 210, and a one-way valve 213 is fixedly installed inside the flow port 212; a base 105 is fixedly installed on the bottom side of the end plate 102, a flow groove 106 is opened on the lower edge of the inner surface of the end plate 102, an electrolyte interface 107 connected with the flow groove 106 is fixedly installed on the lower edge of the outer surface of the end plate 102, and an exhaust port 108 is fixedly installed on the upper edge of the outer surface of the end plate 102; the flow groove 106 and the flow port 212 are connected to each other, and one end of the gas channel 215 is connected to the exhaust port 108.

[0024] Specifically, the electrode plate 209 on the side where the iridium coating 202 is located is connected to the power supply anode line, and the electrode plate 209 on the side where the platinum coating 203 is located is connected to the power supply cathode line. The electrolyte is passed into the electrolytic cell body 2 from the flow port 212 at the anode end of the electrolytic cell body 2, passes through the electrolyte through hole opened at the lower edge of the diaphragm 201 to enter the cathode end of the electrolytic cell body 2, and is discharged from the flow port 212 at the cathode end. The flow direction of the electrolyte is limited by the one-way valve 213. The through hole at the lower edge of the electrolyte water-sealed diaphragm 201 is used to reduce the amount of oxygen entering the cathode end. An external electrolyte circulation system is connected, and the flowing electrolyte carries away part of the electrolyte dissolved in the electrolyte and enters the through hole at the diaphragm 201. The oxygen entering the cathode end re-enters the anode end through the external circulation of the electrolyte, and at the same time, the hydrogen at the cathode end is prevented from entering the anode end from the through hole, and the collected hydrogen and oxygen are purified. At the same time, the gasket 211 and the flow port 212 cover the outer surface of the electrode plate 209 and the inner wall of the electrolyte through hole 210 to prevent the water molecules in the electrolyte from contacting the electrode plate 209 in advance to produce an electrolysis reaction, so that the electrolysis reaction can only react in the anode chamber and the cathode chamber, so that hydrogen and oxygen can quickly contact the opening of the gas channel 215 and smoothly enter the two groups of gas channels 215, thereby improving work efficiency. The electrolyte interface 107 is interconnected with the electrolyte external circulation equipment, and the exhaust port 108 is connected to the oxygen and hydrogen collection pipeline.

[0025] Embodiment 1

[0026] like Figure 2 As shown, in this embodiment, the support structure 1 includes a guide shaft 101, the number of the guide shafts 101 is six, the two ends of the guide shaft 101 are inserted and sleeved with the edge of the end plate 102, the threaded section at one end of the guide shaft 101 passes through the end plate 102 and is screwed with a nut 103, and the threaded section at the other end of the guide shaft 101 passes through another end plate 102 and a gasket 104 and is screwed with a nut 103; two sets of sealing gaskets 204, a mesh frame 205, a cylinder frame 208, an electrode plate 209 and a gasket 211 are inserted and spliced ​​with each other through the guide shaft 101.

[0027] In this embodiment, by tightening the nut 103 and pressing the two sets of end plates 102 inward, the various components of the electrolytic cell body 2 are clamped and fastened, and the sealing gasket 204 is used to maintain the sealing and stability of the anode chamber and cathode chamber inside the electrolytic cell body 2.

[0028] like Figure 3-4 As shown, in this embodiment, a multi-layer mesh 206 is fixedly installed on one opening inside the mesh frame 205, and a titanium felt 207 is fixedly installed on one surface of the multi-layer mesh 206.

[0029] In specific implementation, the multilayer net 206 and the titanium felt 207 are both mesh structures, which play the role of gas diffusion and liquid diversion, and release the oxygen and hydrogen that are not released from the water in time.

[0030] Embodiment 2

[0031] On the basis of Example 1, in order to compensate for the isolation of hydrogen and oxygen by the diaphragm 201 and the driving effect of the fluid electrolyte on the gas molecules dissolved in water in Example 1, hydrogen and oxygen cannot be completely isolated, and the collected gas will still be doped with some hydrogen and oxygen molecules.

[0032] like Figure 3 As shown, in this embodiment, a gas channel 215 is interspersed on the upper edges of the two groups of cylinder frames 208, electrode plates 209, and sealing gaskets 204 and gaskets 211 between the cylinder frames 208 and the electrode plates 209. One end of the gas channel 215 is opened on the upper inner wall of the cylinder frame 208. An oxygen selection filter block 214 is fixedly installed at the opening of the gas channel 215 on the side where the iridium coating 202 is located, and a hydrogen selection filter block 216 is fixedly installed at the opening of the gas channel 215 on the side where the platinum coating 203 is located.

[0033] In specific implementation, an oxygen selective permeable membrane is installed inside the oxygen selective filter block 214, and a hydrogen selective permeable membrane is installed inside the hydrogen selective filter block 216. The oxygen selective permeable membrane and the hydrogen selective permeable membrane are used as the last layer of protection to filter out other gases to ensure that the recovered hydrogen and oxygen have sufficient purity.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0035] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A hydrogen production electrolyzer with the function of separating hydrogen from oxygen, comprising a support structure (1), characterized in that: The support structure (1) has an electrolytic cell body (2) sleeved in the middle, the electrolytic cell body (2) comprising a diaphragm (201), one side of the diaphragm (201) is coated with an iridium coating (202), the other side of the diaphragm (201) is coated with a platinum coating (203), both sides of the diaphragm (201) are bonded with a mesh frame (205) with a sealing gasket (204) as an interval, one side of the mesh frame (205) is bonded with a cylinder frame (208) with a sealing gasket (204) as an interval, and the cylinder frame (208) ) is bonded to one side with an electrode plate (209) separated by a sealing gasket (204); an electrolyte through hole (210) is inserted at the lower edge of the electrode plate (209); a gasket (211) is bonded to one side of the electrode plate (209); a flow port (212) is fixedly installed at the lower edge of one side of the gasket (211); the outer surface of the flow port (212) and the inner wall of the electrolyte through hole (210) are mutually sleeved and bonded; a one-way valve (213) is fixedly installed inside the flow port (212).

2. A hydrogen production electrolyzer with the function of separating hydrogen from oxygen according to claim 1, characterized in that: The support structure (1) comprises guide shafts (101), the number of the guide shafts (101) being six, the two ends of the guide shafts (101) being inserted and sleeved with the edges of the end plates (102), the threaded section at one end of the guide shaft (101) passing through the end plate (102) and being screwed with a nut (103), and the threaded section at the other end of the guide shaft (101) passing through another end plate (102) and a washer (104) being screwed with a nut (103).

3. A hydrogen production electrolyzer with the function of separating hydrogen from oxygen according to claim 2, characterized in that: A base (105) is fixedly mounted on the bottom side of the end plate (102); a flow groove (106) is provided at the lower edge of the inner surface of the end plate (102); an electrolyte interface (107) in communication with the flow groove (106) is fixedly mounted on the lower edge of the outer surface of the end plate (102); and an exhaust port (108) is fixedly mounted on the upper edge of the outer surface of the end plate (102).

4. A hydrogen production electrolyzer with the function of separating hydrogen from oxygen according to claim 3, characterized in that: A multi-layer net (206) is fixedly mounted on an opening on one side of the inner part of the net frame (205), and a titanium felt (207) is fixedly mounted on a surface of one side of the multi-layer net (206).

5. A hydrogen production electrolyzer with the function of separating hydrogen from oxygen according to claim 4, characterized in that: A gas channel (215) is provided through the upper edges of the two groups of the cylinder frame (208), the electrode plate (209), and the sealing gaskets (204) and the gaskets (211) spaced between the cylinder frame (208) and the electrode plate (209). One end of the gas channel (215) is opened on the upper inner wall of the cylinder frame (208). An oxygen selection filter block (214) is fixedly installed at the opening of the gas channel (215) on the side where the iridium coating (202) is located, and a hydrogen selection filter block (216) is fixedly installed at the opening of the gas channel (215) on the side where the platinum coating (203) is located.

6. A hydrogen production electrolyzer with the function of separating hydrogen from oxygen according to claim 5, characterized in that: The two groups of sealing gaskets (204), mesh frames (205), cylinder frames (208), electrode plates (209) and gaskets (211) are interlaced and spliced ​​with each other through the guide shaft (101).

7. A hydrogen production electrolyzer with the function of separating hydrogen from oxygen according to claim 6, characterized in that: The through-flow groove (106) and the through-flow port (212) are in communication with each other, and one end of the gas channel (215) is in communication with the exhaust port (108).

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