Electrolytic bath

Abstract

The utility model discloses an electrolytic bath. The electrolytic cell includes an anode chamber, a cathode chamber, and a diaphragm assembly. All the electrolysis units in the electrolytic tank can be independently assembled and maintained, and the electrolytic tank has the advantages of being small in overall weight, convenient to assemble, rapid to disassemble, controllable in productivity and the like; and the water electrolysis hydrogen production work under different conditions can be met, and the problems that a membrane electrolytic cell is poor in fluctuation resistance and the like are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to an electrolytic cell. In particular, it relates to a hydrogen production electrolytic cell for electrolysis of water by using a sacrificial anode. BACKGROUND

[0002] At present, a hydrogen production electrolytic cell for electrolysis of water by using a proton exchange membrane is widely used. Each electrolysis chamber is formed by left and right polar plates, a gas diffusion layer, a membrane electrode and the like fixed by bolts and assembled into a whole. The electrolytic cell has a high cost of manufacturing materials and assembly, and all electrolysis units of the electrolytic cell have strong correlation and cannot be individually disassembled and repaired, so that the electrolyte in the anode chamber after electrolysis cannot be quickly recovered.

[0003] CN221822349U discloses a hydrogen production electrolytic cell for electrolysis of water by using a sacrificial anode. The hydrogen production electrolytic cell for electrolysis of water by using a sacrificial anode comprises a plurality of electrolysis units and a limiting cylinder. The plurality of electrolysis units are arranged in the limiting cylinder in a series-parallel mode. The capacity can be adjusted and controlled. The electrolytic cell belongs to a small electrolytic cell. The single-seat small electrolytic cell is formed by a plurality of equal electrolysis chambers arranged in a series-parallel mode and positioned by the limiting cylinder. The whole has a small weight and strong adaptability, can satisfy the electrolysis of water for hydrogen production under different current conditions, and overcomes the problem of weak fluctuation resistance of a membrane electrolytic cell. The electrolytic cell needs to be positioned by the limiting cylinder. Moreover, the electrolytic cell is used by combining a single anode chamber and a single cathode chamber. SUMMARY

[0004] Therefore, the utility model aims to provide an electrolytic cell. All electrolysis units of the electrolytic cell can be independently assembled and repaired. The whole has a small weight, is convenient to assemble, can be quickly disassembled, has controllable capacity and the like.

[0005] The utility model realizes the above technical purpose through the following technical scheme.

[0006] The utility model provides an electrolytic cell, comprising an anode chamber, a cathode chamber and a diaphragm assembly. Wherein,

[0007] The cathode chamber is provided with at least one. One cathode chamber is connected with at least two anode chambers.

[0008] The anode chamber comprises a first body, an anode electrode sheet and a first connecting part. The first body has a containing cavity, which is arranged to contain electrolyte and at least a part of the anode electrode sheet. The first connecting part is arranged on the side of the first body.

[0009] The cathode chamber comprises a second body, a cathode electrode sheet and a second connecting part. The second body has a containing cavity, which is arranged to contain electrolyte and at least a part of the cathode electrode sheet. The second connecting part is arranged on the side of the second body.

[0010] The diaphragm assembly is arranged between the anode chamber and the cathode chamber; one side of the diaphragm assembly is connected with the first connecting part, and the other side is connected with the second connecting part.

[0011] According to the electrolytic cell, preferably, one anode electrode sheet is arranged in each anode chamber; and at least one cathode electrode sheet is arranged in each cathode chamber.

[0012] According to the electrolytic cell, preferably, the anode chamber further comprises a gas collecting area, an anode chamber liquid inlet pipe, a first nitrogen gas purging inlet pipe and an anode gas outlet pipe; the anode chamber liquid inlet pipe, the first purging inlet pipe and the anode gas outlet pipe are all arranged at the top of the first body, and the anode chamber liquid inlet pipe and the first nitrogen gas purging inlet pipe are located at one side of the anode electrode sheet; the anode gas outlet pipe is located at the other side of the anode electrode sheet; and the anode gas collecting area is arranged in the area between the electrolyte liquid surface and the top surface of the first body.

[0013] According to the electrolytic cell, preferably, the cathode chamber further comprises a cathode gas collecting area, a cathode chamber liquid inlet pipe, a second nitrogen gas purging inlet pipe and a cathode gas outlet pipe; the second body has a containing cavity for containing electrolyte and at least part of the cathode electrode sheets; the cathode chamber liquid inlet pipe, the second purging inlet pipe and the cathode gas outlet pipe are all arranged at the top of the second body; a plurality of cathode electrode sheets are arranged, and the plurality of cathode electrode sheets are uniformly distributed in the cathode chamber; and the cathode gas collecting area is arranged in the area between the electrolyte liquid surface and the top surface of the second body.

[0014] According to the electrolytic cell, preferably, the diaphragm assembly comprises a diaphragm and a membrane frame; the diaphragm is mounted in the membrane frame, one side of the membrane frame is connected with the first connecting part of the anode chamber, and the other side of the membrane frame is connected with the second connecting part of the cathode chamber.

[0015] According to the electrolytic cell, preferably, a first through hole is arranged in the side of the anode chamber; the first through hole corresponds to one side of the diaphragm; and the first connecting part is arranged at a position close to the first through hole.

[0016] According to the electrolytic cell, preferably, a second through hole is arranged in the side of the cathode chamber; the second through hole corresponds to the other side of the diaphragm; and the second connecting part is arranged at a position close to the second through hole.

[0017] According to the electrolytic cell, preferably, a communication port is further arranged on each anode chamber; and a communication pipeline is arranged between the communication ports on two adjacent anode chambers.

[0018] Preferably, the cathode chamber is further provided with a partition plate; the partition plate is arranged to separate the plurality of cathode electrode pieces.

[0019] Preferably, the first connecting part and the second connecting part are arranged as buckles or sliding rails.

[0020] The electrolytic cell has the advantages of independent assembly and maintenance of all electrolytic units, small overall weight, convenient assembly, quick disassembly, controllable production capacity, strong adaptability, and the like. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a sectional view of the electrolytic cell of the present application.

[0022] Figure 2 is a front view of the anode chamber of the electrolytic cell of the present application.

[0023] Figure 3 is a top view of the anode chamber of the electrolytic cell of the present application.

[0024] Figure 4 is a front view of the cathode chamber of the electrolytic cell of the present application.

[0025] Figure 5 is a top view of the cathode chamber of the electrolytic cell of the present application.

[0026] Figure 6 is a top view of the electrolytic cell combination of the present application.

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] 1-anode chamber, 11-first body, 111-first through hole, 12-anode electrode piece, 13-first connecting part, 14-anode gas collection area, 15-anode chamber liquid inlet pipe, 16-first nitrogen purging gas inlet pipe, 17-anode gas output pipe, 18-communication port;

[0029] 2-cathode chamber, 21-second body, 211-second through hole, 22-cathode electrode piece, 23-second connecting part, 24-cathode gas collection area, 25-cathode chamber liquid inlet pipe, 26-second nitrogen purging gas inlet pipe, 27-cathode gas output pipe;

[0030] 3-septum assembly. DETAILED DESCRIPTION

[0031] The present application will be further described in conjunction with specific embodiments, but the scope of protection of the present application is not limited thereto.

[0032] The electrolytic cell can include an anode chamber, a cathode chamber, and a proton exchange membrane. The following will be described in detail.

[0033] anode compartment

[0034] The anode chamber can include a first body, an anode electrode sheet, and a first connecting portion. The first body has a receiving cavity configured to receive an electrolyte and at least a portion of the anode electrode sheet; and the first connecting portion is arranged on a side of the first body and configured to connect the cathode chamber.

[0035] The shape of the first body can be set according to requirements, and is preferably a cylindrical shape. The anode chamber is provided with at least two anode electrode sheets. The anode electrode sheet is configured as a sacrificial electrode, and the sacrificial anode allows the electrode itself to react and consume, thereby reducing the reaction potential and effectively increasing the hydrogen production. The sacrificial anode can replace the proton exchange membrane electrolytic cell positive plate and metal nickel mesh widely used at present, and preferably, only one anode electrode sheet is arranged in each anode chamber.

[0036] The anode chamber can further include a gas collection area, an anode chamber liquid inlet pipe, a first nitrogen gas purging inlet pipe, and an anode gas outlet pipe. The anode chamber liquid inlet pipe, the first purging inlet pipe, and the anode gas outlet pipe are all arranged on the top of the first body, and the anode chamber liquid inlet pipe and the first nitrogen gas purging inlet pipe are located on one side of the anode electrode sheet; the anode gas outlet pipe is located on the other side of the anode electrode sheet; and the anode gas collection area is arranged in a region between the electrolyte liquid surface and the top surface of the first body.

[0037] The anode electrolyte is injected into the first body through the anode chamber liquid inlet pipe, and inert gas enters the first body through the first purging inlet pipe. After the electrolysis reaction occurs at the anode, in some embodiments, the anode generates gas (such as oxygen, etc.), and the generated gas is collected in the anode gas collection area and is discharged together with the inert gas through the anode gas outlet pipe. In other embodiments, the anode does not generate gas, and only the inert gas is discharged through the anode gas outlet pipe.

[0038] A first through hole is formed in the side of the anode chamber, and the first through hole corresponds to one side of the diaphragm assembly; and the first connecting portion is arranged at a position close to the first through hole. Ions in the electrolyte of the anode chamber can freely pass through the first through hole, the diaphragm assembly, and perform ion transfer. The first connecting portion can be a buckle or a sliding rail. In this way, the electrolyte of the anode chamber can be prevented from leaking.

[0039] In some embodiments, a plurality of anode chambers can be provided, and a communication port can be further provided on each anode chamber, and a communication pipeline can be provided at the communication ports of two adjacent anode chambers. In this way, the electrolyte in each anode chamber can flow into each other. During operation, the electrolyte in the plurality of electrolytic cells in the electrolytic tank can flow continuously and cyclically, and the electrolyte can be intermittently fed and discharged.

[0040] cathode compartment

[0041] In the utility model, the cathode chamber can include a second body, a cathode electrode sheet and a second connecting part; the second body has a containing cavity which is arranged to contain electrolyte and at least a part of the cathode electrode sheet; the second connecting part is arranged at the side of the second body; the first connecting part and the second connecting part are connected.

[0042] In the utility model, the shape of the second body can be set as, for example, a cylindrical shape and a polygonal shape according to the number of cathode electrode sheets. The cathode chamber can be provided with one or a plurality of cathode chambers, and preferably one cathode chamber. At least one cathode electrode sheet is arranged in each cathode chamber, and preferably a plurality of cathode electrode sheets are arranged, and more preferably the number of cathode electrode sheets is not more than six.

[0043] In some embodiments, one cathode chamber is provided, and a plurality of cathode electrode sheets are arranged, and the number of anode chambers is the same as the number of cathode electrode sheets, and the plurality of anode chambers are distributed circumferentially around the cathode chamber to form a plurality of electrolytic cells.

[0044] In other embodiments, a plurality of cathode chambers can be provided, and the plurality of cathode chambers are connected in series, and the plurality of anode chambers are distributed around the cathode chamber. For example, two cathode chambers are provided, six cathode electrode sheets are arranged in each cathode chamber, and six second connecting parts are arranged at the side of each cathode chamber, the two cathode chambers are connected through the second connecting parts, and ten anode chambers can be distributed circumferentially around the two cathode chambers, so that the required production capacity is achieved.

[0045] The cathode chamber further includes a cathode gas collection area, a cathode chamber liquid inlet pipe, a second nitrogen purging gas inlet pipe and a cathode gas outlet pipe; the second body has a containing cavity for containing electrolyte and at least a part of the cathode electrode sheet; the cathode chamber liquid inlet pipe, the second purging gas inlet pipe and the cathode gas outlet pipe are all arranged at the top of the second body. A plurality of cathode electrode sheets are uniformly distributed in the cathode chamber and can be arranged around the cathode chamber liquid inlet pipe, the second nitrogen purging gas inlet pipe and the cathode gas outlet pipe; the cathode gas collection area is arranged in the area between the electrolyte liquid level and the top surface of the second body.

[0046] The cathode electrolyte is injected into the second body through the cathode chamber liquid inlet pipe, and the inert gas is introduced into the second body through the second purging gas inlet pipe, and after the electrolysis reaction occurs in the cathode, the generated gas (hydrogen) is collected in the cathode gas collection area and is discharged through the cathode gas outlet pipe together with the inert gas.

[0047] The side of the cathode chamber is provided with a second through hole corresponding to the other side of the diaphragm assembly, and the second connecting part is arranged at a position close to the second through hole. The second connecting part is arranged as a buckle or a sliding rail, so that the electrolyte leakage of the cathode chamber can be prevented.

[0048] In some embodiments, a partition plate can be further arranged in the cathode chamber.

[0049] separator assembly

[0050] The diaphragm assembly is arranged between the cathode chamber and the anode chamber, which allows the free movement of ions in the electrolysis circuit and isolates the gas generated in the electrolysis process.

[0051] The diaphragm assembly comprises a diaphragm and a membrane frame, the diaphragm is arranged in the membrane frame, one side of the membrane frame is connected with the first connecting part of the anode chamber, and the other side of the membrane frame is connected with the second connecting part of the cathode chamber.

[0052] The diaphragm can be selected from one of a PE diaphragm, a PVDF diaphragm, a PTFE diaphragm, a PPS diaphragm, a proton exchange membrane (PEM membrane) and a composite diaphragm, preferably one of a PPS diaphragm, a proton exchange membrane (PEM membrane) and a composite diaphragm, and more preferably a proton exchange membrane (PEM membrane).

[0053] Example 1

[0054] Figure 1 It is a cross-sectional view of the electrolytic tank of the utility model. Figure 2 It is a front view of the anode chamber of the electrolytic tank of the utility model. Figure 3 It is a top view of the anode chamber of the electrolytic tank of the utility model. Figure 4 It is a front view of the cathode chamber of the electrolytic tank of the utility model.

[0055] Figure 5 It is a top view of the cathode chamber of the electrolytic tank of the utility model. Figure 6 It is a top view of the electrolytic tank combination of the embodiment.

[0056] As Figure 1 and Figure 6 shown, one electrolytic cell of the embodiment comprises an anode chamber 1, a cathode chamber 2 and a diaphragm assembly 3. Six anode chambers 1 are arranged and one cathode chamber 2 is arranged. The six anode chambers are evenly distributed around the cathode chamber 2 to form multiple electrolytic units.

[0057] As Figures 1-3 shown, the anode chamber 1 comprises a first body 11, an anode electrode sheet 12, a first connecting part 13, an anode gas collection zone 14, an anode chamber liquid inlet pipe 15, a first nitrogen purging gas inlet pipe 16, an anode gas outlet pipe 17 and a communication port 18.

[0058] The first body 11 has a containing cavity for containing electrolyte and at least a part of the anode electrode sheet 12. A first through hole 111 is formed on the side of the first body 11, and the first connecting part 13 is arranged near the first through hole 111. The anode chamber liquid inlet pipe 15, the first purging gas inlet pipe 16 and the anode gas outlet pipe 17 are all arranged on the top of the first body 11, and the anode chamber liquid inlet pipe 15 and the first nitrogen purging gas inlet pipe 16 are located on the same side of the anode electrode sheet 12, and the anode gas outlet pipe 17 is located on the other side of the anode electrode sheet 12. The anode gas collection zone 14 is arranged in the region between the electrolyte liquid level and the top surface of the first body 11.

[0059] The anode electrolyte is injected into the first body 11 through the anode chamber liquid inlet pipe 15, and the inert gas is introduced into the first body 11 through the first purging gas inlet pipe 16. After the electrolysis reaction occurs at the anode, the generated gas is collected in the anode gas collection zone 14 and is discharged together with the inert gas through the anode gas outlet pipe 17. As Figure 2 shown, the anode chamber 1 is also provided with a communication port 18, and a communication pipe is arranged between the communication ports 18 of adjacent two anode chambers 1, so that the electrolyte in each anode chamber 1 can flow into each other. During operation, the electrolyte in the six electrolytic units of the electrolytic cell can flow continuously and circulate, and can be intermittently liquid-in and liquid-out.

[0060] As Figure 1 , 4 and 5 shown, the cathode chamber 2 comprises a second body 21, a cathode electrode sheet 22, a second connecting part 23, a cathode gas collection zone 24, a cathode chamber liquid inlet pipe 25, a second nitrogen purging gas inlet pipe 26 and a cathode gas outlet pipe 27.

[0061] The second body 21 is provided as a hexagonal cylinder structure with a containing chamber for containing electrolyte and at least a part of the cathode electrode sheet 22. The side of the second body 21 is provided with six second through holes 211, and the second connecting part 23 is correspondingly arranged close to the second through holes 211. The cathode chamber liquid inlet pipe 25, the second purging gas inlet pipe 26 and the cathode gas outlet pipe 27 are all arranged at the top of the second body 21, and the cathode electrode sheet 22 is provided as six pieces, which are arranged around the cathode chamber liquid inlet pipe 25, the second purging gas inlet pipe 26 and the cathode gas outlet pipe 27, and correspondingly arranged with the six sides of the second body 21. The cathode gas collection area 24 is arranged between the electrolyte liquid level and the top surface of the second body 21.

[0062] The cathode electrolyte is injected into the second body 21 through the cathode chamber liquid inlet pipe 25, and the inert gas is introduced into the second body 21 through the second purging gas inlet pipe, and after the electrolysis reaction occurs in the cathode, the generated gas (hydrogen) is collected in the cathode gas collection area 24 and discharged together with the inert gas through the cathode gas outlet pipe 27.

[0063] The diaphragm assembly 3 is arranged between the anode chamber 1 and the cathode chamber 2. The diaphragm assembly 3 comprises a diaphragm and a film frame, the diaphragm is installed in the film frame, one side of the film frame is connected with the first connecting part 13 of the anode chamber 1, and the other side of the film frame is connected with the second connecting part 23 of the cathode chamber 2. The electrolyte ions in the anode chamber 1 and the cathode chamber 2 can be ion exchanged and transmitted through the first through hole 111, the second through hole 211 and the diaphragm respectively. In the embodiment, the diaphragm is a proton exchange membrane, the first connecting part 13 is provided as a buckle, and the second connecting part 23 is a slide rail. One side of the film frame is connected with the anode chamber 1 by the buckle, and the other side of the film frame is connected with the cathode chamber 2 by the slide rail bearing plug-in type connection.

[0064] The utility model is not limited to the above-mentioned embodiment, any deformation, improvement, replacement that the person skilled in the art can think of without departing from the essential content of the utility model falls into the range of the utility model.

Claims

1. An electrolytic cell, characterized in that, It includes an anode chamber, a cathode chamber, and a diaphragm assembly; among which, At least one cathode chamber is provided; each cathode chamber is connected to at least two anode chambers. The anode chamber includes a first body, an anode electrode plate, and a first connecting portion; the first body has a receiving chamber configured to receive electrolyte and at least a portion of the anode electrode plate; the first connecting portion is disposed on the side of the first body; The cathode chamber includes a second body, a cathode electrode plate, and a second connecting portion; the second body has a receiving chamber configured to receive electrolyte and at least a portion of the cathode electrode plate; the second connecting portion is disposed on the side of the second body; The diaphragm assembly is disposed between the anode chamber and the cathode chamber; one side of the diaphragm assembly is connected to the first connecting part, and the other side is connected to the second connecting part.

2. The electrolytic cell according to claim 1, characterized in that, Each of the anode chambers is provided with one anode electrode plate; each of the cathode chambers is provided with at least one cathode electrode plate.

3. The electrolytic cell according to claim 2, characterized in that, The anode chamber further includes a gas collection area, an anode chamber liquid inlet pipe, a first nitrogen purging inlet pipe, and an anode gas outlet pipe; the anode chamber liquid inlet pipe, the first purging inlet pipe, and the anode gas outlet pipe are all located on the top of the first body, and the anode chamber liquid inlet pipe and the first nitrogen purging inlet pipe are located on one side of the anode electrode plate; the anode gas outlet pipe is located on the other side of the anode electrode plate; the anode gas collection area is located in the area between the electrolyte surface and the top surface of the first body.

4. The electrolytic cell according to claim 2, characterized in that, The cathode chamber further includes a cathode gas collection area, a cathode chamber liquid inlet pipe, a second nitrogen purging inlet pipe, and a cathode gas outlet pipe; the second body has a receiving chamber for containing electrolyte and at least a portion of the cathode electrode plates; the cathode chamber liquid inlet pipe, the second purging inlet pipe, and the cathode gas outlet pipe are all located at the top of the second body; multiple cathode electrode plates are provided, and the multiple cathode electrode plates are evenly distributed in the cathode chamber; the cathode gas collection area is located in the region between the electrolyte surface and the top surface of the second body.

5. The electrolytic cell according to claim 1, characterized in that, The diaphragm assembly includes a diaphragm and a membrane frame; the diaphragm is installed inside the membrane frame, one side of the membrane frame is connected to a first connection portion of the anode chamber, and the other side of the membrane frame is connected to a second connection portion of the cathode chamber.

6. The electrolytic cell according to claim 5, characterized in that, The anode chamber has a first through hole on its side; the first through hole corresponds to one side of the diaphragm; the first connecting part is located near the first through hole.

7. The electrolytic cell according to claim 6, characterized in that, The cathode chamber has a second through hole on its side; the second through hole corresponds to the other side of the diaphragm; the second connecting part is located near the second through hole.

8. The electrolytic cell according to claim 1, characterized in that, Each of the anode chambers is also provided with a communication port; a communication pipe is provided between the communication ports of two adjacent anode chambers.

9. The electrolytic cell according to claim 4, characterized in that, The cathode chamber is also provided with a partition; the partition is configured to separate the plurality of cathode electrode plates.

10. The electrolytic cell according to any one of claims 1 to 9, characterized in that, Both the first connecting part and the second connecting part are configured as snap-fit ​​or slide rail.

Images