Modularized pressure type alkaline hydrogen production electrolytic cell

Abstract

The invention discloses a modularized pressure type alkaline hydrogen production electrolytic cell which comprises a left end plate and a right end plate which are oppositely arranged, a plurality of electrolysis modules which are tightly arranged are arranged between the left end plate and the right end plate, a second fastening mechanism is connected between the electrolysis modules, and a first fastening mechanism is connected between the left end plate and the right end plate. And a supporting seat is connected between the left end plate and the right end plate. The whole large-capacity electrolytic cell is changed into a plurality of electrolytic modules, each module can operate independently or be connected in series to form a larger-capacity electrolytic cell, workpieces such as polar plates, electrodes, diaphragms and the like can be manufactured into the electrolytic modules in advance according to the structure, and the electrolytic cells can be assembled by the plurality of electrolytic modules after use parameters of the electrolytic cells are determined. And only the fault module needs to be removed when the electrolytic cell breaks down, so that the hydrogen production capacity of the electrolytic cell can be changed according to the requirements of a production field, and reconstruction or extension is facilitated.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrolytic water hydrogen production equipment, and particularly relates to a modular pressure-type alkaline hydrogen production electrolytic cell. Background Art

[0002] The electrolytic cell is the core equipment in the electrolytic water hydrogen production system, and it is a device that electrolyzes water to generate hydrogen and oxygen. The main structure of the electrolytic cell consists of end plates, sealing gaskets, anode and cathode meshes, diaphragms, tensioning mechanisms, etc. Currently, most of the electrolytic cells supporting the existing electrolytic water hydrogen production systems adopt a bipolar pressure filter structure, which is composed of multiple juxtaposed electrolytic chambers, and the two ends are compressed by two end plates and several tensioning bolts to form a compact pressure filter structure. When electrolyzing water, under the action of direct current, hydrogen evolution reaction occurs at the cathode of each electrolytic chamber to generate hydrogen, and oxygen evolution reaction occurs at the anode to generate oxygen.

[0003] The assembly process of the conventional electrolytic cell is to stack the electrolytic chambers on the horizontally placed end plates in sequence, and then compress them with tensioning bolts. In a large-capacity electrolytic cell, the number of electrolytic chambers is large, and the assembly time is relatively long. Once a failure occurs during operation, only the entire cell body can be disassembled, and after replacing the components, it needs to be reinstalled. The number of chambers cannot be changed after the overall assembly is completed, which is not conducive to later reconstruction and expansion. Summary of the Invention

[0004] The purpose of the present invention is to provide a modular pressure-type alkaline hydrogen production electrolytic cell, which solves the problem that when a large-capacity electrolytic cell fails during operation, only the entire cell body can be disassembled.

[0005] The technical solution adopted by the present invention is: a modular pressure-type alkaline hydrogen production electrolytic cell, including a left end plate and a right end plate arranged oppositely, between the left end plate and the right end plate, there are a number of closely arranged electrolytic modules, a second fastening mechanism is connected between the number of electrolytic modules, a first fastening mechanism is connected between the left end plate and the right end plate, and a support seat is connected between the left end plate and the right end plate.

[0006] The characteristics of the present invention also lie in that,

[0007] The electrolytic module includes two end plates arranged oppositely, both end plates are in contact with the support seat, between the two end plates, two bipolar plates are closely arranged, between the two bipolar plates, an anode electrode, a diaphragm, a sealing gasket, and a cathode electrode are closely arranged in sequence from left to right, and the second fastening mechanism is connected between the two end plates.

[0008] The second fastening mechanism includes two screw fixing seats, the two screw fixing seats are respectively connected to the end plates in a one-to-one correspondence, and a screw is connected between the two screw fixing seats.

[0009] The first fastening mechanism includes a long screw rod that passes through the left end plate and the right end plate. Two disc spring groups are sleeved on the rod body of the long screw rod. The left end plate and the right end plate are arranged between the two disc spring groups. Two fastening nuts are also connected to the rod body of the long screw rod, and the two fastening nuts are respectively arranged on the sides of the disc spring groups away from the left end plate and the right end plate.

[0010] Both the left end plate and the right end plate are set as regular hexagonal structures, and hydrogen-oxygen gas-liquid holes, caustic solution holes, and sewage discharge holes are provided on the plate surfaces of the left end plate and the right end plate.

[0011] The plate surface of the end plate electrode is also provided with hydrogen-oxygen gas-liquid holes, caustic solution holes, and sewage discharge holes, and the positions where the hydrogen-oxygen gas-liquid holes, caustic solution holes, and sewage discharge holes are provided correspond to the positions of the left end plate and the right end plate.

[0012] The beneficial effects of the present invention are as follows: The modular pressure-type alkaline hydrogen production electrolytic cell of the present invention changes the large-capacity electrolytic cell from an integral one to several electrolytic modules. Each module can operate independently or be connected in series to form a larger-capacity electrolytic cell. This structure can prefabricate workpieces such as electrode plates, electrodes, and diaphragms into electrolytic modules. After determining the use parameters of the electrolytic cell, several electrolytic modules can be assembled into an electrolytic cell, which greatly reduces the overall assembly time of the electrolytic cell. When a fault occurs in the electrolytic cell, only the faulty module needs to be removed, and the remaining modules can still be used normally. It is also more conducive to changing the hydrogen production capacity of the electrolytic cell according to the requirements of the production site, and is convenient for reconstruction or expansion. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the modular pressure-type alkaline hydrogen production electrolytic cell of the present invention;

[0014] Figure 2 is a schematic structural diagram of the electrolytic module in the modular pressure-type alkaline hydrogen production electrolytic cell of the present invention;

[0015] Figure 3 is a schematic internal structural diagram of the electrolytic module in the modular pressure-type alkaline hydrogen production electrolytic cell of the present invention;

[0016] Figure 4 is a side view of the end plate electrode in the modular pressure-type alkaline hydrogen production electrolytic cell of the present invention;

[0017] Figure 5 is a side view of the left end plate in the modular pressure-type alkaline hydrogen production electrolytic cell of the present invention.

[0018] In the figure, 1. electrolysis module, 101. bipolar plate, 102. anode electrode, 103. diaphragm, 104. sealing washer, 105. cathode electrode, 106. end plate, 107. hydrogen-oxygen gas-liquid hole, 108. lye hole, 109. sewage discharge hole, 2. left end plate, 3. right end plate, 4. first fastening mechanism, 401. long screw, 402. disc spring group, 403. fastening nut, 5. support seat, 6. second fastening mechanism, 601. screw, 602. screw fixing seat. Specific embodiments

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] The present invention provides a modular pressure-type alkaline hydrogen production electrolyzer, as Figure 1 shown, including a left end plate 2 and a right end plate 3 arranged oppositely. Between the left end plate 2 and the right end plate 3, a number of closely arranged electrolysis modules 1 are provided. A second fastening mechanism 6 is connected between the several electrolysis modules 1. A first fastening mechanism 4 is connected between the left end plate 2 and the right end plate 3. The first fastening mechanism 4 presses the electrolysis module 1 through bolt tension. A support seat 5 is connected between the left end plate 2 and the right end plate 3. The support seat 5 is arranged on the ground and is used to support the electrolysis module 1 to prevent the electrolysis module 1 from sinking and deforming. The several electrolysis modules 1 are fastened together through the first fastening mechanism 4 to complete the overall assembly of the electrolyzer. The inside of the electrolysis module 1 is fastened through the second fastening mechanism 6. After the alkaline aqueous solution enters the electrolyzer, it is electrolyzed in the electrolysis module 1 to generate hydrogen and oxygen, and then enters the gas-liquid system through their respective channels.

[0021] Example 1

[0022] As Figures 2 - 3 shown, the electrolysis module 1 includes two oppositely arranged end plates 106. Both end plates 106 are in contact with the support seat 5. A bipolar plate 101 is closely arranged between the two end plates 106. An anode electrode 102, a diaphragm 103, a sealing washer 104, and a cathode electrode 105 are closely arranged between the two bipolar plates 101 from left to right in sequence. The second fastening mechanism 6 is connected between the two end plates 106. The material of the diaphragm 103 is PPS cloth to prevent the mixing of hydrogen and oxygen gases from exploding. When assembling the electrolysis module 1, first install one side of the end plate 106, and then stack and install the bipolar plate 101, the anode electrode 102, the diaphragm 103, the sealing washer 104, the cathode electrode 105, and the other bipolar plate 101 and end plate 106 in sequence, and then tighten through the second fastening mechanism 6 to make the electrolysis module 1 a whole. Two adjacent electrolysis modules 1 are in close contact with each other through their end plates 106.

[0023] Example 2

[0024] As Figure 4As shown in the figure, the second fastening mechanism 6 includes two screw fixing seats 602, which are correspondingly connected to the end plates 106 one by one. A screw 601 is connected between the two screw fixing seats 602. When assembling the electrolysis module 1, the screw 601 passes through the two end plates 106 and is tightened, making the electrolysis module 1 an integral whole.

[0025] Embodiment 3

[0026] The first fastening mechanism 4 includes a long screw 401. The long screw 401 passes through the left end plate 2 and the right end plate 3. Two disc spring groups 402 are sleeved on the rod body of the long screw 401. The left end plate 2 and the right end plate 3 are arranged between the two disc spring groups 402. Two fastening nuts 403 are also connected to the rod body of the long screw 401, and the two fastening nuts 403 are respectively arranged on the sides of the disc spring groups 402 away from the left end plate 2 and the right end plate 3. When assembling the electrolytic cell as a whole, the left end plate 2 is fixed to the support seat 5, the electrolysis module 1 and the right end plate are installed in sequence. The long screw 401 passes through the left end plate 2, the right end plate 3 and the two end plates 106, and the installation of the first fastening mechanism 4 is completed through the fastening nuts 403 and the disc spring groups 402. The fastening nuts 403 are tightened to reach the design torque, and then the second fastening mechanism 6 is removed, that is, the overall assembly of the electrolytic cell is completed.

[0027] Embodiment 4

[0028] As Figure 5 shown in the figure, both the left end plate 2 and the right end plate 3 are set as regular hexagon structures. Hydrogen and oxygen gas-liquid holes 107, alkali solution holes 108 and sewage discharge holes 109 are provided on the plate surfaces of the left end plate 2 and the right end plate 3. The left end plate 2 and the right end plate 3 are regular polygons or circles. The hydrogen and oxygen gas-liquid holes 107 are arranged in the upper half of the left end plate 2 and the right end plate 3, and the alkali solution holes 108 and the sewage discharge holes 109 are arranged in the lower half of the left end plate 2 and the right end plate 3.

[0029] The plate surface of the end plate 106 is also provided with hydrogen and oxygen gas-liquid holes 107, alkali solution holes 108 and sewage discharge holes 109, and the positions where the hydrogen and oxygen gas-liquid holes 107, alkali solution holes 108 and sewage discharge holes 109 are provided correspond to the positions of the left end plate 2 and the right end plate 3. The alkaline liquid uses KOH or NaOH aqueous solution as the electrolyte. The alkaline aqueous solution enters the electrolysis module 1 from the alkali solution hole 108. The diaphragm 103 material in the electrolysis module 1 adopts PPS cloth. Under the action of direct current, water is electrolyzed, and hydrogen and oxygen are precipitated on the electrode surface. Hydrogen and oxygen are discharged from the hydrogen and oxygen gas-liquid holes 107 and enter the gas-liquid system through their respective channels.

[0030] The working principle of the modular pressure-type alkaline hydrogen production electrolytic cell of the present invention is as follows:

[0031] After the electrolytic cell is assembled, an aqueous solution of KOH or NaOH enters the electrolysis module 1 through the lye hole 108. Under the action of direct current, water is electrolyzed. Oxygen is evolved on the surface of the anode electrode 102, and hydrogen is evolved on the surface of the cathode electrode 105. The hydrogen and oxygen are discharged from the hydrogen-oxygen gas-liquid hole 107 and enter the gas-liquid system through their respective channels.

[0032] The modular pressure-type alkaline hydrogen production electrolytic cell of the present invention designs an assembled electrolysis module and an electrolysis module fastening mechanism, which assembles the plate, diaphragm, and electrode mesh used in the traditional process into a module, reduces the total assembly time and the overall assembly difficulty, enables rapid disassembly and replacement, and at the same time provides the possibility for the expansion and reform of the hydrogen production electrolytic cell.

Claims

1. Modular pressure-type alkaline hydrogen production electrolyzer cell, Characterized in that, It includes a left end plate (2) and a right end plate (3) arranged oppositely. Between the left end plate (2) and the right end plate (3), a number of electrolysis modules (1) are arranged closely. A second fastening mechanism (6) is connected between a number of the electrolysis modules (1). A first fastening mechanism (4) is connected between the left end plate (2) and the right end plate (3). A support seat (5) is connected between the left end plate (2) and the right end plate (3).

2. The modular pressure-type alkaline hydrogen production electrolyzer cell according to claim 1, Characterized in that, The electrolysis module (1) includes two end plates (106) arranged oppositely. Both of the two end plates (106) are in contact with the support seat (5). Between the two end plates (106), bipolar plates (101) are arranged closely. Between the two bipolar plates (101), an anode electrode (102), a diaphragm (103), a sealing gasket (104), and a cathode electrode (105) are arranged closely in sequence from left to right. The second fastening mechanism (6) is connected between the two end plates (106).

3. The modular pressure-type alkaline hydrogen production electrolyzer cell according to claim 2, Characterized in that, The second fastening mechanism (6) includes two screw fixing seats (602). The two screw fixing seats (602) are connected to the end plates (106) in one-to-one correspondence. A screw (601) is connected between the two screw fixing seats (602).

4. The modular pressure-type alkaline hydrogen production electrolyzer cell according to claim 1, Characterized in that, The first fastening mechanism (4) includes a long screw (401). The long screw (401) passes through the left end plate (2) and the right end plate (3). Two disc spring groups (402) are sleeved on the rod body of the long screw (401). The left end plate (2) and the right end plate (3) are arranged between the two disc spring groups (402). Two fastening nuts (403) are also connected to the rod body of the long screw (401). The two fastening nuts (403) are respectively arranged on the sides of the disc spring groups (402) away from the left end plate (2) and the right end plate (3).

5. The modular pressure-type alkaline hydrogen production electrolyzer cell according to claim 4, Characterized in that, Both the left end plate (2) and the right end plate (3) are arranged in a regular hexagon structure. Hydrogen and oxygen gas-liquid holes (107), lye holes (108), and sewage discharge holes (109) are opened on the plate surfaces of the left end plate (2) and the right end plate (3).

6. The modular pressure-type alkaline hydrogen production electrolyzer cell according to claim 2, Characterized in that, Hydrogen and oxygen gas-liquid holes (107), lye holes (108), and sewage discharge holes (109) are also opened on the plate surfaces of the end plates (106). The positions where the hydrogen and oxygen gas-liquid holes (107), lye holes (108), and sewage discharge holes (109) are opened correspond to the positions of the left end plate (2) and the right end plate (3).

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