Novel large alkaline water electrolysis hydrogen production electrolytic cell of flow field flow channel

Abstract

The utility model belongs to the technical field of water electrolysis hydrogen production equipment, and discloses a novel large alkaline water electrolysis hydrogen production electrolytic bath of a flow field runner, which comprises a cylindrical bath body, a left end pressing plate and a right end pressing plate are respectively arranged at two ends of the bath body, a middle polar plate is arranged in the middle of the bath body, a left end polar plate is arranged between the middle polar plate and the left end pressing plate, and a right end polar plate is arranged between the middle polar plate and the right end pressing plate. A right end polar plate is arranged between the middle polar plate and the right end pressing plate; the middle polar plate and the left end polar plate form a cylindrical left half groove, and the middle polar plate and the right end polar plate form a cylindrical right half groove; a two-way gas-liquid runner hole groove and a radial alkali liquor hole channel which are communicated with the left half groove and the right half groove are formed in the middle polar plate; inner cavity hole grooves and radial holes are formed in the left end polar plate and the right end polar plate; according to the utility model, the gas-liquid resistance in the runner can be quickly and effectively reduced, the alkali liquor circulation efficiency can be improved, and the internal temperature uniformity and the electrolysis efficiency of the electrolytic bath are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of water electrolysis hydrogen production equipment, relates to a hydrogen production electrolytic cell, and particularly relates to a large alkaline water electrolysis hydrogen production electrolytic cell with a novel flow field and flow channel. Background Art

[0002] The electrolyzer is the core equipment in the hydrogen production system. At present, large-scale alkaline electrolyzers are only equipped with two oxygen outlets, two hydrogen outlets and two alkali liquid inlets, resulting in large flow field resistance, high cell pressure, uneven temperature field and low electrolysis efficiency inside the electrolyzer. With the proposal of the "dual carbon" goal, large-scale electrolyzer equipment with higher electrolysis efficiency and higher current density has emerged. However, the large-scale electrolyzer will greatly increase the number of electrolysis chambers. With the increase in the number of electrolysis chambers and the increase in current density, the cell pressure will inevitably increase, and the resistance of the gas-liquid flow field, the internal temperature field unevenness and corrosion in the electrolyzer will increase, resulting in the internal operating pressure and temperature unevenness of the electrolyzer, the operating state deteriorates and the electrolysis efficiency decreases. Therefore, optimizing the design of the electrolyzer structure layout and the internal gas-liquid flow field flow path can not only reduce the gas-liquid flow resistance during operation inside the electrolyzer, but also make the temperature field more uniform and the electrolysis efficiency higher. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a large-scale alkaline water electrolysis hydrogen production electrolytic cell with a new flow field flow channel that can quickly and effectively reduce the gas-liquid resistance in the flow channel, improve the alkali solution circulation efficiency, and ensure the uniformity of the temperature inside the electrolytic cell and the electrolysis efficiency.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a large-scale alkaline water electrolysis hydrogen production electrolytic cell with a new flow field and flow channel, including a cylindrical cell body, a left end pressure plate and a right end pressure plate are respectively provided at both ends of the cell body, an intermediate plate is provided in the middle of the cell body, a left end plate is provided between the intermediate plate and the left end pressure plate, and a right end plate is provided between the intermediate plate and the right end pressure plate; the intermediate plate and the left end plate form a cylindrical left half-cell, and the intermediate plate and the right end plate form a cylindrical right half-cell; the intermediate plate is provided with a bidirectional gas-liquid flow channel hole groove and a radial alkali liquid hole groove connecting the left half-cell and the right half-cell; the left end plate and the right end plate are both provided with an inner cavity hole groove and a radial hole.

[0005] Furthermore, a first oxygen outlet hole, a second oxygen outlet hole, a first hydrogen outlet hole, a second hydrogen outlet hole, a first alkali solution inlet hole and a second alkali solution inlet hole are provided on the left end pressure plate; a third oxygen outlet hole, a fourth oxygen outlet hole, a third hydrogen outlet hole, a fourth hydrogen outlet hole, a third alkali solution inlet hole and a fourth alkali solution inlet hole are provided on the right end pressure plate.

[0006] Furthermore, the first electrolyte inlet hole on the left end pressure plate is connected to the inner cavity of the middle electrode plate, and the second electrolyte inlet hole is connected to the inner cavity of the left end electrode plate; the third electrolyte inlet hole on the right end pressure plate is connected to the middle electrode plate, and the fourth electrolyte inlet hole is connected to the inner cavity of the right end electrode plate.

[0007] Further, the inner cavity of the intermediate plate is respectively connected with the first oxygen outlet hole, the second oxygen outlet hole, the third oxygen outlet hole, the fourth oxygen outlet hole, the first hydrogen outlet hole, the second hydrogen outlet hole, the third hydrogen outlet hole, and the fourth hydrogen outlet hole; the first electrolyte inlet on the left end pressure plate is connected with the inner cavity of the intermediate plate through the first electrolyte channel, and the second electrolyte inlet is connected with the inner cavity of the left end plate through the second electrolyte channel; the third electrolyte inlet on the right end pressure plate is connected with the inner cavity of the intermediate plate through the third electrolyte channel, and the fourth electrolyte inlet is connected with the inner cavity of the right end plate through the fourth electrolyte channel;

[0008] Furthermore, the inner cavity of the middle plate is connected to the first oxygen outlet and the first hydrogen outlet on the left end pressure plate through the first oxygen channel and the first hydrogen channel respectively; the inner cavity of the left end plate is connected to the second oxygen outlet and the second hydrogen outlet on the left end pressure plate through the second oxygen channel and the second hydrogen channel respectively.

[0009] Furthermore, the inner cavity of the middle plate is connected to the third oxygen outlet and the third hydrogen outlet on the right end pressure plate through the third oxygen channel and the third hydrogen channel respectively; the inner cavity of the right end plate is connected to the fourth oxygen outlet and the fourth hydrogen outlet on the right end pressure plate through the fourth oxygen channel and the fourth hydrogen channel respectively.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model divides the cell body into two independent and non-interfering cycles of the left half cell and the right half cell through the arrangement of the intermediate electrode plate. At the same time, the left half cell and the right half cell are respectively provided with two electrolyzed lye flow field circulation flow channels and two hydrogen and oxygen channels. The utility model can quickly and effectively reduce the gas-liquid resistance in the flow channel, improve the flow field, and improve the lye circulation efficiency. At the same time, it ensures the uniform temperature and electrolysis efficiency inside the electrolytic cell, ensuring the normal, reliable, safe and efficient operation of the electrolytic cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 It is a schematic diagram of the left end pressing plate in the utility model;

[0013] Figure 3 It is a schematic diagram of the right end pressing plate in the utility model.

[0014] Among them, the left end pressure plate 1, the tank body 2, the left end plate 3, the middle plate 4, the right end plate 5, the right end pressure plate 6, the left half tank 7, the right half tank 8, the first oxygen channel 9 of the left half tank, the second oxygen channel 10 of the left half tank, the third oxygen channel 11 of the right half tank, the fourth oxygen channel 12 of the right half tank, the first hydrogen channel 13 of the left half tank, the second hydrogen channel 14 of the left half tank, the third hydrogen channel 15 of the right half tank, the fourth hydrogen channel 16 of the right half tank, the first electrolyzed liquid channel 17 of the left half tank, the second electrolyzed liquid channel 18 of the left half tank, the The third electro-alkali solution channel 19, the fourth electro-alkali solution channel 20 in the right half tank, the first oxygen outlet A1 in the left half tank, the second oxygen outlet A2 in the left half tank, the third oxygen outlet A3 in the right half tank, the fourth oxygen outlet A4 in the right half tank, the first hydrogen outlet B1 in the left half tank, the second hydrogen outlet B2 in the left half tank, the third hydrogen outlet B3 in the right half tank, the fourth hydrogen outlet B4 in the right half tank, the first electro-alkali solution inlet C1 in the left half tank, the second electro-alkali solution inlet C2 in the left half tank, the third electro-alkali solution inlet C3 in the right half tank, and the fourth electro-alkali solution inlet C4 in the right half tank. DETAILED DESCRIPTION

[0015] A large-scale alkaline water electrolysis hydrogen production electrolyzer with a new flow field and flow channel, such as Figure 1-3 As shown, it includes a cylindrical trough body 2, with a left end pressure plate 1 and a right end pressure plate 6 respectively provided at both ends of the trough body 2, an intermediate plate 4 is provided in the middle of the trough body 2, a left end plate 3 is provided between the intermediate plate 4 and the left end pressure plate 1, and a right end plate 5 is provided between the intermediate plate 4 and the right end pressure plate 6; the intermediate plate 4 and the left end plate 3 form a cylindrical left half trough 7, and the intermediate plate 4 and the right end plate 5 form a cylindrical right half trough 8; the intermediate plate 4 is provided with a bidirectional gas-liquid flow channel groove and a radial alkali liquid channel connecting the left half trough 7 and the right half trough 8; the left end plate 3 and the right end plate 5 are both provided with inner cavity grooves and radial holes.

[0016] The left end pressing plate 1 is provided with a first oxygen outlet hole A1, a second oxygen outlet hole A2, a first hydrogen outlet hole B1, a second hydrogen outlet hole B2, a first alkali solution inlet hole C1 and a second alkali solution inlet hole C2; ​​the right end pressing plate 6 is provided with a third oxygen outlet hole A3, a fourth oxygen outlet hole A4, a third hydrogen outlet hole B3, a fourth hydrogen outlet hole B4, a third alkali solution inlet hole C3 and a fourth alkali solution inlet hole C4; the first electrolyte inlet hole C1 on the left end pressing plate 1 is connected to the inner cavity of the intermediate plate 4, and the second electrolyte inlet hole C2 is connected to the left end pressing plate 6. The inner cavity of the electrode 3 is connected; the third electrolyte inlet hole C3 on the right end pressure plate 6 is connected to the middle electrode 4, and the fourth electrolyte inlet hole C4 is connected to the inner cavity of the right end electrode 5; the inner cavity of the middle electrode 4 is respectively connected to the first oxygen outlet hole A1, the second oxygen outlet hole A2, the third oxygen outlet hole A3, the fourth oxygen outlet hole A4, the first hydrogen outlet hole B1, the second hydrogen outlet hole B2, the third hydrogen outlet hole B3, and the fourth hydrogen outlet hole B4; the first electrolyte inlet C1 on the left end pressure plate 1 is connected to the first electrolyte channel 17 through the first electrolyte channel 17 The inner cavity of the middle plate 4 is connected, and the second electrolyte inlet C2 is connected to the inner cavity of the left plate 3 through the second electrolyte channel 18; the third electrolyte inlet C3 on the right end pressure plate 6 is connected to the inner cavity of the middle plate 4 through the third electrolyte channel 19, and the fourth electrolyte inlet C4 is connected to the inner cavity of the right end plate 5 through the fourth electrolyte channel 20; the inner cavity of the middle plate 4 is connected to the first oxygen outlet A1 and the first hydrogen outlet B on the left end pressure plate 1 through the first oxygen channel 9 and the first hydrogen channel 13 respectively. 1; the inner cavity of the left end plate 3 is connected with the second oxygen outlet A2 and the second hydrogen outlet B2 on the left end pressure plate 1 through the second oxygen channel 10 and the second hydrogen channel 14 respectively; the inner cavity of the middle plate 4 is connected with the third oxygen outlet A3 and the third hydrogen outlet B3 on the right end pressure plate 6 through the third oxygen channel 11 and the third hydrogen channel 15 respectively; the inner cavity of the right end plate 5 is connected with the fourth oxygen outlet A4 and the fourth hydrogen outlet B4 on the right end pressure plate 6 through the fourth oxygen channel 12 and the fourth hydrogen channel 16 respectively.

[0017] The first electrolyte inlet C1 and the second electrolyte inlet C2 arranged on the left end pressure plate 1 respectively form different alkaline solution circulation channels; firstly, the alkaline solution of the left half tank 7 enters the radial channels of the middle plate 4 and the radial channels of the left end plate 3 through the first electrolyte inlet C1 and the first electrolyte channel 17 and the second electrolyte channel 18 of the second electrolyte inlet C2, and then the two groups of alkaline solutions respectively enter the corresponding electrolytic unit chambers of the left half tank 7.

[0018] The third electrolyte inlet C3 and the fourth electrolyte inlet C4 arranged on the right end pressure plate 6 respectively form different alkaline solution circulation channels; firstly, the alkaline solution of the right half tank 8 enters the radial channels of the middle plate 4 and the radial channels of the right end plate 5 through the third electrolyte inlet C3 and the third electrolyte channel 19 and the fourth electrolyte channel 20 of the fourth electrolyte inlet C4, and then the two groups of alkaline solutions respectively enter the corresponding electrolytic unit chambers of the right half tank 8.

[0019] The working process of this utility model is as follows:

[0020] In the left half tank 7, the electrolyte enters the first electrolyte inlet C1 and the second electrolyte inlet C2 from the left half tank 7, respectively, and then enters the inner cavity formed by the intermediate electrode plate 4 and the left end electrode plate 3 through the first electrolyte channel 17 and the second electrolyte channel 18, respectively, and is introduced into the electrolysis chamber of the left half tank 7 through the radial holes on the intermediate electrode plate 4 and the left end electrode plate 3 to perform the electrolysis operation; the oxygen and hydrogen generated in the electrolysis process are transported to the first oxygen outlet A1 and the second oxygen outlet A2 of the left half tank 7 and the first hydrogen outlet B1 and the second hydrogen outlet B2 of the left half tank 7 through the first oxygen channel 9, the second oxygen channel 10 and the first hydrogen channel 13 and the second hydrogen channel 14, respectively, and then discharged; this part of the alkali solution is closed circulated in the left half tank 7.

[0021] In the right half tank 8, the electrolyte enters the third electrolyte inlet C3 and the fourth electrolyte inlet C4 from the right half tank 8 respectively, and then enters the inner cavity formed by the middle plate 4 and the right end plate 5 through the third electrolyte channel 19 and the fourth electrolyte channel 20 respectively, and is introduced into the electrolysis chamber of the right half tank 8 through the radial holes on the middle plate 4 and the right end plate 5 to perform the electrolysis operation; the oxygen and hydrogen generated during the electrolysis process are transported to the third oxygen outlet A3 and the fourth oxygen outlet A4 of the right half tank 8 and the third hydrogen outlet B3 and the fourth hydrogen outlet B4 of the right half tank 8 through the third oxygen channel 11, the fourth oxygen channel 12 and the third hydrogen channel 15, the fourth hydrogen channel 16 respectively, and then discharged; this part of the alkali solution is closed circulated in the right half tank 8; the entire electrolysis process is carried out simultaneously in the left half tank 7 and the rear half tank 8 without interfering with each other.

Claims

1. A large-scale alkaline water electrolysis hydrogen production electrolyzer with a novel flow field and flow channel, characterized in that: It includes a cylindrical trough body, with a left end pressure plate and a right end pressure plate respectively provided at both ends of the trough body, an intermediate electrode plate provided in the middle of the trough body, a left end electrode plate provided between the intermediate electrode plate and the left end pressure plate, and a right end electrode plate provided between the intermediate electrode plate and the right end pressure plate; the intermediate electrode plate and the left end electrode plate form a cylindrical left half trough, and the intermediate electrode plate and the right end electrode plate form a cylindrical right half trough; a bidirectional gas-liquid flow channel groove and a radial alkali liquid channel connecting the left half trough and the right half trough are provided on the intermediate electrode plate; inner cavity grooves and radial holes are provided on the left end electrode plate and the right end electrode plate.

2. The large-scale alkaline water electrolysis hydrogen production electrolyzer according to claim 1, characterized in that: The left end pressure plate is provided with a first oxygen outlet hole, a second oxygen outlet hole, a first hydrogen outlet hole, a second hydrogen outlet hole, a first alkali solution inlet hole and a second alkali solution inlet hole; the right end pressure plate is provided with a third oxygen outlet hole, a fourth oxygen outlet hole, a third hydrogen outlet hole, a fourth hydrogen outlet hole, a third alkali solution inlet hole and a fourth alkali solution inlet hole.

3. The large-scale alkaline water electrolysis hydrogen production electrolyzer according to claim 2, characterized in that: The first electrolyte inlet hole on the left end pressure plate is connected to the inner cavity of the middle electrode plate, and the second electrolyte inlet hole is connected to the inner cavity of the left end electrode plate; the third electrolyte inlet hole on the right end pressure plate is connected to the middle electrode plate, and the fourth electrolyte inlet hole is connected to the inner cavity of the right end electrode plate.

4. The large-scale alkaline water electrolysis hydrogen production electrolyzer according to claim 3, characterized in that: The inner cavity of the intermediate electrode plate is connected with the first oxygen outlet hole, the second oxygen outlet hole, the third oxygen outlet hole, the fourth oxygen outlet hole, the first hydrogen outlet hole, the second hydrogen outlet hole, the third hydrogen outlet hole and the fourth hydrogen outlet hole respectively; the first electrolyte inlet on the left end pressure plate is connected with the inner cavity of the intermediate electrode plate through the first electrolyte channel, and the second electrolyte inlet is connected with the inner cavity of the left end electrode plate through the second electrolyte channel; the third electrolyte inlet on the right end pressure plate is connected with the inner cavity of the intermediate electrode plate through the third electrolyte channel, and the fourth electrolyte inlet is connected with the inner cavity of the right end electrode plate through the fourth electrolyte channel.

5. The large-scale alkaline water electrolysis hydrogen production electrolyzer according to claim 4, characterized in that: The inner cavity of the middle plate is connected to the first oxygen outlet and the first hydrogen outlet on the left end plate through the first oxygen channel and the first hydrogen channel respectively; the inner cavity of the left end plate is connected to the second oxygen outlet and the second hydrogen outlet on the left end plate through the second oxygen channel and the second hydrogen channel respectively.

6. The large-scale alkaline water electrolysis hydrogen production electrolyzer according to claim 5, characterized in that: The inner cavity of the middle plate is connected to the third oxygen outlet and the third hydrogen outlet on the right end plate through the third oxygen channel and the third hydrogen channel respectively; the inner cavity of the right end plate is connected to the fourth oxygen outlet and the fourth hydrogen outlet on the right end plate through the fourth oxygen channel and the fourth hydrogen channel respectively.

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