Bipolar seawater electrolytic bath

Abstract

The utility model discloses a bipolar seawater electrolytic bath, which relates to the technical field of electrolytic baths and comprises a cathode end plate and an anode end plate, a plurality of electrolytic bath units are fittingly mounted between the cathode end plate and the anode end plate, and a sealing gasket and a diaphragm are fittingly mounted between every two adjacent electrolytic bath units. The cathode end plate and the anode end plate are connected in a matched mode through a plurality of locking screw assemblies, and the electrolytic cell units are arranged in parallel in a shunt matched mode. When the electrolytic cell unit is used, seawater can be filled into the electrolytic cell unit to penetrate through the corresponding waterproof and moisture-permeable film, the water content in alkaline water is supplemented, indirect electrolysis of the seawater is achieved, the manufacturing cost is low, a plurality of electrolytic cells can be conveniently connected in parallel, the volume power density of the electrolytic cells is high, and the service life of the electrolytic cells is prolonged. And large-scale industrial production can be conveniently carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic cells, in particular to a bipolar seawater electrolytic cell. Background Art

[0002] Seawater electrolysis is a technology that uses seawater as an electrolyte to produce hydrogen and oxygen through an electrolytic process. This technology has enormous potential because it can utilize Earth's virtually unlimited seawater resources to produce clean energy. Currently, seawater electrolysis is divided into two categories: direct seawater electrolysis and indirect seawater electrolysis (electrolysis after desalination and electrolysis after automatic water absorption based on the principle of phase change migration).

[0003] The current difficulties faced by indirect seawater electrolysis (phase change migration type) are: low volume power density, the current electrolytic cell only has a single-pole structure, resulting in high equipment costs, and the lack of process conditions for large-scale equipment.

[0004] To this end, a bipolar seawater electrolyzer is proposed. Utility Model Content

[0005] In order to solve the problem raised in the above background technology that the current phase change migration type seawater indirect monopolar electrolyzer does not have the conditions for large-scale chemical industry, the purpose of the present utility model is to provide a bipolar seawater electrolyzer.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a bipolar seawater electrolyzer, comprising a cathode end plate and an anode end plate, wherein a plurality of electrolytic cell units are cooperatively installed between the cathode end plate and the anode end plate, a sealing gasket and a diaphragm are cooperatively installed between every two adjacent electrolytic cell units, the cathode end plate and the anode end plate are cooperatively connected by a plurality of locking screw assemblies, and the electrolytic cell units are arranged in parallel and shunt.

[0007] Preferably, the electrolytic cell unit includes a pole frame, which is provided with an alkali solution replenishment channel and a seawater inlet channel. The pole frame is also provided with a hydrogen outlet channel, an oxygen outlet channel and a seawater outlet channel. The alkali solution replenishment channel, seawater inlet channel, hydrogen outlet channel, oxygen outlet channel and seawater outlet channel all pass through the cathode end plate and are connected to corresponding pipelines.

[0008] Preferably, an intermediate conductive ring is installed in the pole frame, an intermediate support is installed in the intermediate conductive ring, an anode conductive flat ring and an anode conductive concave ring are installed on one side of the intermediate conductive ring, two anode cover nets are installed in the anode conductive flat ring and the anode conductive concave ring, two anode lining nets are installed between the two anode cover nets, an anode side waterproof and moisture permeable membrane is installed between the two anode lining nets, an anode support is installed on one side of the anode conductive concave ring, and a cathode net is installed on one side of the anode support.

[0009] Preferably, a cathode conductive flat ring and a cathode conductive concave ring are installed in cooperation with each other on the other side of the middle conductive ring, two cathode cover nets are installed in cooperation with each other in the cathode conductive flat ring and the cathode conductive concave ring, two cathode lining nets are installed between the two cathode cover nets, a cathode side waterproof and moisture permeable membrane is installed between the two cathode lining nets, a cathode support is installed on one side of the cathode conductive concave ring, and an anode net is installed on one side of the cathode support.

[0010] Preferably, one side of the middle support is connected to the seawater inlet channel through a seawater inlet branch channel, and the other side of the middle support is connected to the seawater outlet channel through a seawater outlet branch channel.

[0011] Preferably, one side of the anode support is connected to the alkali liquid replenishment channel through the anode alkali liquid replenishment branch channel, the other side of the anode support is connected to the oxygen outlet channel through the oxygen outlet branch channel, one side of the cathode support is connected to the alkali liquid replenishment channel through the cathode alkali liquid replenishment branch channel, and the other side of the cathode support is connected to the hydrogen outlet channel through the hydrogen outlet branch channel.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] When the electrolytic cell unit of the present invention is in use, seawater can be filled in to pass through the corresponding waterproof and moisture-permeable membrane to replenish the water content in the alkaline water, thereby realizing indirect electrolysis of seawater. The manufacturing cost of this solution is low, and multiple electrolytic cells can be easily connected in parallel, so that the volume power density of the electrolytic cell is high. In addition, since the electrolytic cell unit of the present invention has a simple structure, it can be conveniently connected in series, meeting the production needs of large-scale industrial electrolytic cells.

[0014] The electrolytic cell unit of the present invention uses phase change migration technology, which can prevent seawater from directly participating in the electrolysis operation. It can only enter the alkaline water through the corresponding waterproof and breathable membrane, and then complete the oxygen and hydrogen production operations by electrolyzing the alkaline water. The waterproof and breathable membrane isolates the liquid water and impurity ions in the seawater from the outside, further increasing the concentration of the produced hydrogen and effectively preventing the production of chlorine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the basic structure of a bipolar seawater electrolyzer of the present invention.

[0016] Figure 2 A bipolar seawater electrolyzer of the present invention Figure 1 side view.

[0017] Figure 3 This is a schematic diagram of the internal structure of a bipolar seawater electrolyzer of the present invention.

[0018] Figure 4 This is a schematic diagram of the internal structure of an electrolytic cell unit of a bipolar seawater electrolytic cell of the present invention.

[0019] In the figure: 101, cathode end plate; 102, anode end plate; 103, locking screw assembly; 104, sealing gasket; 105, diaphragm; 200, electrolyzer unit; 201, pole frame; 202, alkali solution supply channel; 203, seawater inlet channel; 204, seawater inlet branch channel; 205, seawater outlet channel; 206, hydrogen outlet channel; 207, oxygen outlet channel; 208, oxygen outlet branch channel; 209, hydrogen outlet branch channel; 210, seawater outlet branch channel; 211, cathode alkali solution supply channel 212, anode alkali solution replenishment branch channel; 213, middle conductive ring; 214, middle support; 215, anode conductive flat ring; 216, anode conductive concave ring; 217, anode cover mesh; 218, anode lining mesh; 219, anode side waterproof and breathable membrane; 220, anode support; 221, cathode conductive concave ring; 222, cathode conductive flat ring; 223, cathode cover mesh; 224, cathode lining mesh; 225, cathode side waterproof and breathable membrane; 226, cathode support; 227, cathode mesh; 228, anode mesh. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figure 1-4As shown, the present embodiment provides a bipolar seawater electrolyzer, comprising a cathode end plate 101 and an anode end plate 102, wherein a plurality of electrolytic cell units 200 are installed between the cathode end plate 101 and the anode end plate 102, and a sealing gasket 104 and a diaphragm 105 are installed between every two adjacent electrolytic cell units 200, and the cathode end plate 101 and the anode end plate 102 are connected by a plurality of locking screw assemblies 103, and the electrolytic cell units 200 are arranged in parallel and shunt. A plurality of parallel electrolytic cell units 200 can facilitate the industrialization and large-scale development of seawater electrolysis equipment, abandoning the current single-electrode phase change migration type seawater electrolysis equipment, and adopting a plurality of parallel electrolytic cell units 200 to construct the seawater electrolysis equipment, which greatly reduces the production and maintenance costs of the equipment.

[0022] The electrolytic cell unit 200 includes a pole frame 201, on which an alkali solution replenishment channel 202 and a seawater inlet channel 203 are provided. The pole frame 201 is also provided with a hydrogen outlet channel 206, an oxygen outlet channel 207 and a seawater outlet channel 205. The alkali solution replenishment channel 202, the seawater inlet channel 203, the hydrogen outlet channel 206, the oxygen outlet channel 207 and the seawater outlet channel 205 all pass through the cathode end plate 101 and are connected to corresponding pipelines. In this embodiment, when the electrolytic cell unit 200 is in use, the pressure in the seawater inlet channel 203 should be ensured to be greater than the pressure in the alkali solution replenishment channel 202, so as to facilitate the phase change of seawater during electrolysis and increase the hydrogen production per unit time and unit power.

[0023] An intermediate conductive ring 213 is installed in the pole frame 201, and an intermediate support 214 is installed in the intermediate conductive ring 213. An anode conductive flat ring 215 and an anode conductive concave ring 216 are installed on one side of the intermediate conductive ring 213. Two anode cover nets 217 are installed in the anode conductive flat ring 215 and the anode conductive concave ring 216. Two anode lining nets 218 are installed between the two anode cover nets 217. An anode side waterproof and breathable membrane 219 is installed between the two anode lining nets 218. An anode support 220 is installed on one side of the anode conductive concave ring 216. A cathode net 227 is installed on one side of the intermediate conductive ring 213. A cathode conductive flat ring 222 and a cathode conductive concave ring 221 are installed, and two cathode cover nets 223 are installed in the cathode conductive flat ring 222 and the cathode conductive concave ring 221. Two cathode lining nets 224 are installed between the two cathode cover nets 223. A cathode side waterproof and moisture-permeable membrane 225 is installed between the two cathode lining nets 224. A cathode support 226 is installed on one side of the cathode conductive concave ring 221, and an anode net 228 is installed on one side of the cathode support 226. One side of the intermediate support 214 is connected to the seawater inlet channel 203 through the seawater inlet branch channel 204, and the other side of the intermediate support 214 is connected to the seawater outlet channel 205 through the seawater outlet branch channel 210.

[0024] In this embodiment, alkaline water uses a hydroxide solution as an electrolyte. This electrolyte has the characteristics of low saturated vapor pressure, high ionic conductivity and a wide electrochemical window, which can better improve the spontaneous migration speed of water in seawater. When the electrolytic cell unit 200 is in operation, the water vapor pressure difference between the seawater in the middle support 214 and the alkaline water in the waterproof and breathable membrane will cause spontaneous seawater vaporization. The water vapor diffuses into the alkaline water through the waterproof and breathable membrane, where it is absorbed by the electrolyte and re-liquefied. This "liquid-gas-liquid" phase change migration process provides a pure water source for electrolysis.

[0025] One side of the anode support 220 is connected to the alkali liquid replenishment channel 202 through the anode alkali liquid replenishment branch channel 212, the other side of the cathode support 226 is connected to the hydrogen outlet channel 206 through the hydrogen outlet branch channel 209, one side of the cathode support 226 is connected to the alkali liquid replenishment channel 202 through the cathode alkali liquid replenishment branch channel 211, and the other side of the anode support 220 is connected to the oxygen outlet channel 207 through the oxygen outlet branch channel 208.

[0026] It should be further explained that when the present invention is in use, the corresponding alkali solution can be replenished through the alkali solution replenishment channel 202, seawater can be replenished through the seawater inlet channel 203, and the seawater after work can be extracted through the seawater outlet channel 205. The hydrogen generated by the work is discharged through the hydrogen outlet channel 206, and the oxygen generated by the work is discharged through the oxygen outlet channel 207. When in use, seawater can be filled in to pass through the corresponding waterproof and breathable membrane to replenish the water content in the alkaline water, thereby realizing indirect electrolysis of seawater. The manufacturing cost of this solution is low, and multiple electrolytic cells can be easily connected in parallel, so that the volume power density of the electrolytic cell is high, and large-scale industrial production can be conveniently carried out. The electrolytic cell unit 200 of the present invention uses phase change migration technology, which can prevent seawater from directly participating in the electrolysis operation. It can only enter the alkaline water through the corresponding waterproof and breathable membrane, and then complete the oxygen and hydrogen production operations by electrolyzing the alkaline water. The waterproof and breathable membrane can isolate the liquid water and impurity ions in the seawater, further improving the concentration of the produced hydrogen and effectively preventing the production of chlorine.

[0027] In this document, relational terms such as first and second, etc., are used solely to distinguish one entity or operation from another entity or operation and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed or that are inherent to such process, method, article, or apparatus.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bipolar seawater electrolyzer, characterized in that: The invention comprises a cathode end plate (101) and an anode end plate (102), wherein a plurality of electrolytic cell units (200) are installed between the cathode end plate (101) and the anode end plate (102), a sealing gasket (104) and a diaphragm (105) are installed between every two adjacent electrolytic cell units (200), the cathode end plate (101) and the anode end plate (102) are connected by a plurality of locking screw assemblies (103), and the electrolytic cell units (200) are arranged in parallel and shunt; The electrolytic cell unit (200) comprises a pole frame (201), an alkali solution replenishment channel (202) and a seawater inlet channel (203) are provided on the pole frame (201), a hydrogen outlet channel (206), an oxygen outlet channel (207) and a seawater outlet channel (205) are also provided on the pole frame (201), and the alkali solution replenishment channel (202), the seawater inlet channel (203), the hydrogen outlet channel (206), the oxygen outlet channel (207) and the seawater outlet channel (205) all pass through the cathode end plate (101) and are connected to corresponding pipelines; An intermediate conductive ring (213) is installed in the pole frame (201), an intermediate support (214) is installed in the intermediate conductive ring (213), an anode conductive flat ring (215) and an anode conductive concave ring (216) are installed on one side of the intermediate conductive ring (213), two anode cover nets (217) are installed in the anode conductive flat ring (215) and the anode conductive concave ring (216), two anode lining nets (218) are installed between the two anode cover nets (217), an anode side waterproof and moisture permeable membrane (219) is installed between the two anode lining nets (218), an anode support (220) is installed on one side of the anode conductive concave ring (216), and a cathode net (227) is installed on one side of the anode support (220).

2. The bipolar seawater electrolyzer according to claim 1, characterized in that: A cathode conductive flat ring (222) and a cathode conductive concave ring (221) are cooperatively installed on the other side of the middle conductive ring (213); two cathode cover nets (223) are cooperatively installed in the cathode conductive flat ring (222) and the cathode conductive concave ring (221); two cathode lining nets (224) are cooperatively installed between the two cathode cover nets (223); a cathode side waterproof and moisture permeable membrane (225) is cooperatively installed between the two cathode lining nets (224); a cathode support (226) is cooperatively installed on one side of the cathode conductive concave ring (221); and an anode net (228) is cooperatively installed on one side of the cathode support (226).

3. The bipolar seawater electrolyzer according to claim 2, characterized in that: One side of the intermediate support (214) is in communication with the seawater inlet channel (203) via the seawater inlet branch channel (204), and the other side of the intermediate support (214) is in communication with the seawater outlet channel (205) via the seawater outlet branch channel (210).

4. The bipolar seawater electrolyzer according to claim 3, characterized in that: One side of the anode support (220) is connected to the alkali solution replenishment channel (202) through the anode alkali solution replenishment branch channel (212), the other side of the cathode support (226) is connected to the hydrogen outlet channel (206) through the hydrogen outlet branch channel (208), one side of the cathode support (226) is connected to the alkali solution replenishment channel (202) through the cathode alkali solution replenishment branch channel (211), and the other side of the anode support (220) is connected to the oxygen outlet channel (207) through the oxygen outlet branch channel (209).

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