Alkaline hydrogen production electrolyzer and system

Abstract

The present invention relates to the technical field of electrolytic hydrogen production, and specifically to an alkaline hydrogen production electrolyzer and system. The alkaline hydrogen production electrolyzer includes two pressure plates and a plurality of pole frames arranged between the two pressure plates. Alkali liquid is transported from a first feed port on the pressure plates on both sides through a feed pipe on a cylindrical inner wall formed by the plurality of pole frames to a distribution chamber located in the middle position. The distribution chamber is then distributed to different groups of reaction chambers along the distribution pipe to participate in the electrolysis reaction. The produced hydrogen and oxygen are respectively transported along a first discharge pipe and a second discharge pipe to the first discharge port and the second discharge port on the pressure plates on both sides and then output. Through the distribution of the distribution chamber and the distribution pipe, the alkali liquid can be distributed from the distribution chamber to different groups of reaction chambers in parallel, shortening the path and time for the alkali liquid to reach the reaction chambers on both sides, so as to achieve uniform flow of the alkali liquid to each group of reaction chambers, thereby improving the flow direction of the alkali liquid in the entire electrolyzer, so as to achieve more uniform flow of the alkali liquid and further make the temperature of the reaction chamber more uniform.

Description

Technical Field

[0001] The present invention relates to the technical field of electrolytic hydrogen production, and in particular to an alkaline hydrogen production electrolytic cell and system. Background Art

[0002] Hydrogen production by electrolysis involves the electrolysis of alkaline solution into hydrogen and oxygen in an electrolytic cell. The electrolytic cell typically consists of a cell, an anode, and a cathode, often separated by a diaphragm. When direct current passes through the cell, an oxidation reaction occurs at the anode-solution interface, while a reduction reaction occurs at the cathode-solution interface, producing hydrogen and oxygen.

[0003] Since the current density of a single electrolysis chamber separated by a diaphragm is relatively low, three hundred to four hundred electrolysis chambers are usually stacked to increase hydrogen production.

[0004] In the electrolytic cell of the prior art, alkali solution usually flows from one end chamber to the other end chamber. Due to the excessive number of chambers, the alkali solution is unevenly distributed in each chamber, resulting in different temperatures in each electrolytic chamber, causing local high temperature and local burn-through of the diaphragm. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of uneven distribution of alkali solution in each chamber in the prior art.

[0006] In order to solve the above problems, the present invention provides an alkaline hydrogen production electrolyzer, comprising:

[0007] Two pressing plates and multiple pole frames arranged between the two pressing plates, the multiple pole frames form a cylindrical side wall, and the adjacent pole frames are separated by a diaphragm to form multiple chambers, the multiple chambers include a distribution chamber located in the middle, and reaction chambers located on both sides of the distribution chamber, the reaction chamber is provided with a pole plate, and a feeding pipe, a distribution pipe, a first discharge pipe and a second discharge pipe are also provided in the side wall, one end of the feeding pipe forms a first feed port on the pressing plate, and the other end is connected to the distribution chamber, the distribution pipe is connected to the distribution chamber and the multiple reaction chambers, the first discharge pipe and the second discharge pipe form a first discharge port and a second discharge port on the pressing plate, and the first discharge pipe and the second discharge pipe are both connected to the multiple reaction chambers.

[0008] Furthermore, in this alkaline hydrogen production electrolyzer, the pole frame comprises:

[0009] A first pole frame, having a first cavity inside, the first pole frame being suitable for connecting to the positive electrode, a plurality of second feed ports connected to the feed pipe and a first distribution port connected to the distribution pipe being provided at the bottom end of the first pole frame, a plurality of first communicating holes and second communicating holes being provided on the inner wall of the first pole frame, the first communicating holes being connected to the second feed port and the first cavity, the second communicating holes being connected to the first distribution port and the first cavity, a third discharge port being connected to the first discharge pipe and a fourth discharge port being connected to the second discharge pipe being provided at the top end of the first pole frame, a plurality of first guide grooves being provided on the side wall of the first pole frame, the first guide grooves being connected to the first distribution port and the first cavity, at least one second guide groove being provided on the side wall of the first pole frame, the second guide groove being connected to the third discharge port and the cavity or to the fourth discharge port and the first cavity, and the first guide groove and the second guide groove being located on opposite sides of the first pole frame;

[0010] A plurality of second pole frames each having a second cavity therein, the second pole frames being suitable for connecting to the negative pole, the second pole frames being located on both sides of the first pole frame, and the plurality of second pole frames being divided into a plurality of groups, the bottom end of the second pole frame being provided with a plurality of third feed ports connected to the feed pipe and a second distribution port connected to the distribution pipe, the third feed port being connected to the second feed port, the number of second distribution ports on each group of second pole frames being arranged in a decreasing manner in the direction away from the first pole frame, the second distribution port being connected to the first distribution port, the top end of the second pole frame being provided with a fifth discharge port connected to the first discharge pipe and a sixth discharge port connected to the second discharge pipe, a plurality of third guide grooves being provided on both side walls of the second pole frame, the third guide grooves connecting the second distribution port and the second cavity, at least one fourth guide groove being provided on the side wall of the second pole frame, the fourth guide groove connecting the fifth discharge port and the second cavity and connecting the sixth discharge port and the second cavity, and the fourth guide groove connecting the fifth discharge port and the sixth discharge port being located on opposite sides of the second pole frame.

[0011] Furthermore, the alkaline hydrogen production electrolyzer further comprises:

[0012] A gasket is provided between the electrode plate and the first electrode frame and between the electrode plate and the second electrode frame.

[0013] Furthermore, in this alkaline hydrogen production electrolyzer, the second distribution port located away from the first pole frame is higher than the second distribution port located near the first pole frame.

[0014] Furthermore, in this alkaline hydrogen production electrolyzer, the pressure plate is further provided with a discharge port, the discharge port is communicated with the reaction chamber, and the height of the discharge port is lower than the position of the second feed port.

[0015] Furthermore, the alkaline hydrogen production electrolyzer further comprises:

[0016] a first terminal block, provided on the outer wall of the first pole frame;

[0017] The second terminal block is arranged on the outer wall of the second pole frame.

[0018] Furthermore, in this alkaline hydrogen production electrolyzer, a plurality of mounting holes are provided on the pressing plate, and the fixing assembly is detachably mounted in the mounting holes on two of the pressing plates.

[0019] Furthermore, in this alkaline hydrogen production electrolyzer, the fixing assembly includes:

[0020] A pull rod is installed in the installation hole, and both ends of the pull rod are provided with threads;

[0021] Nuts, mounted at both ends of the pull rod;

[0022] The butterfly-shaped spring piece is sleeved on the pull rod and is located between the nut and the pressure plate.

[0023] The present invention also provides an alkaline hydrogen production system, comprising the alkaline hydrogen production electrolyzer described above.

[0024] Furthermore, the alkaline hydrogen production system further comprises:

[0025] a circulator, communicating with the feed inlets on the two pressing plates;

[0026] A gas-liquid separator is connected to the first discharge port, the second discharge port and the circulator.

[0027] The present invention has the following advantages:

[0028] 1. The alkaline hydrogen production electrolyzer provided by the present invention includes two pressing plates and multiple pole frames arranged between the two pressing plates, the multiple pole frames forming a cylindrical side wall, and adjacent pole frames are separated by diaphragms to form multiple chambers, the multiple chambers including a distribution chamber located in the middle and reaction chambers located on both sides of the distribution chamber, multiple adjacent reaction chambers form a group, and the reaction chambers on both sides are divided into multiple groups, pole plates are provided in the reaction chamber, and a feeding pipe, a distribution pipe, a first discharge pipe and a second discharge pipe are also provided in the side wall, one end of the feeding pipe forms a first feeding port on the pressing plate, and the other end is connected to the distribution chamber, the distribution pipe is connected to the distribution chamber and the multiple reaction chambers, the distribution pipes in the multiple groups of reaction chambers are also divided into multiple groups accordingly, each group of distribution pipes connects the distribution chamber with the multiple reaction chambers of the corresponding group, the first discharge pipe and the second discharge pipe form a first discharge port and a second discharge port on the pressing plate, and the first discharge pipe and the second discharge pipe are both connected to the multiple reaction chambers.

[0029] During hydrogen production, alkali liquid is fed from the first feed inlets on the two side pressure plates through feed pipes on the cylindrical inner wall formed by multiple pole frames to a central distribution chamber. The distribution chamber then distributes the alkali liquid along the distribution pipes to different groups of reaction chambers for electrolysis. The produced hydrogen and oxygen are respectively fed along the first and second discharge pipes to the first and second discharge ports on the two side pressure plates for output. The distribution of the distribution chamber and the distribution pipes allows the alkali liquid to be distributed in parallel to different groups of reaction chambers, shortening the path and time it takes for the alkali liquid to reach the two reaction chambers, ensuring uniform flow to each group of reaction chambers. This improves the flow direction of the alkali liquid throughout the electrolytic cell, achieving more uniform flow and further uniform reaction chamber temperatures, preventing excessive alkali liquid temperatures within the reaction chambers from causing localized high temperatures and burning through the diaphragms. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 Schematic diagram of the three-dimensional structure of the alkaline hydrogen production electrolyzer provided in an embodiment of the present invention;

[0032] Figure 2 Schematic diagram of the flow of alkaline solution in an alkaline hydrogen production electrolyzer provided in an embodiment of the present invention;

[0033] Figure 3 This is a front view of a middle pressure plate of an alkaline hydrogen production electrolyzer provided in an embodiment of the present invention;

[0034] Figure 4 This is a front view of the first pole frame in the alkaline hydrogen production electrolyzer provided in an embodiment of the present invention;

[0035] Figure 5 for Figure 4 A in the middle is an enlarged schematic diagram;

[0036] Figure 6 This is a front view of the first group of second pole frames in the alkaline hydrogen production electrolyzer provided in an embodiment of the present invention;

[0037] Figure 7 This is a front view of the second electrode frame of the second group in the alkaline hydrogen production electrolyzer provided in an embodiment of the present invention;

[0038] Figure 8 This is a front view of the nth group of second pole frames in the alkaline hydrogen production electrolyzer provided in an embodiment of the present invention;

[0039] Figure 9 Based Figure 6 Enlarged schematic diagram of point B in the middle.

[0040] Description of reference numerals:

[0041] 1. Pressing plate; 11. First feed port; 12. First discharge port; 13. Second discharge port; 14. Discharge port; 15. Mounting hole;

[0042] 2. Pole frame; 21. First pole frame; 211. Second feed port; 212. First distribution port; 213. First connecting hole; 214. Second connecting hole; 215. Third discharge port; 216. Fourth discharge port; 217. First guide groove; 218. Second guide groove;

[0043] 22, second pole frame; 221, third feed port; 222, second distribution port; 223, fifth discharge port; 224, sixth discharge port; 225, third guide trough; 226, fourth guide trough; 23, first terminal block; 24, second terminal block;

[0044] 3. Distribution chamber; 4. Reaction chamber; 5. Feed pipe; 6. Distribution pipe; 7. First discharge pipe; 8. Second discharge pipe; 9. Fixing assembly; 91. Pull rod; 92. Nut; 93. Disc-shaped spring. DETAILED DESCRIPTION

[0045] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0048] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0049] Example 1

[0050] like Figures 1 to 9 The present embodiment shows an alkaline hydrogen production electrolyzer, comprising two pressing plates 1 and a plurality of pole frames 2 disposed between the two pressing plates 1. The plurality of pole frames 2 form a cylindrical side wall. Adjacent pole frames 2 are separated by a diaphragm to form a plurality of chambers. The plurality of chambers includes a distribution chamber 3 located in the middle and reaction chambers 4 located on both sides of the distribution chamber 3. The plurality of adjacent reaction chambers 4 form a group, and the reaction chambers 4 on both sides are divided into multiple groups. The reaction chamber 4 is provided with a pole plate, and the side wall is also provided with a feed pipe 5, a distribution pipe 6, and a first discharge pipe. 7 and the second discharge pipe 8, one end of the feed pipe 5 forms a first feed port 11 on the pressing plate 1, and the other end is connected to the distribution chamber 3, the distribution pipe 6 is connected to the distribution chamber 3 and multiple reaction chambers 4, the distribution pipes 6 in the multiple groups of reaction chambers 4 are also divided into multiple groups accordingly, and the distribution pipes 6 of each group connect the distribution chamber 3 with the multiple reaction chambers 4 of the corresponding group, the first discharge pipe 7 and the second discharge pipe 8 form a first discharge port 12 and a second discharge port 13 on the pressing plate 1, and the first discharge pipe 7 and the second discharge pipe 8 are both connected to the multiple reaction chambers 4.

[0051] During hydrogen production, alkali solution is delivered from the first feed port 11 on the two side pressure plates 1 through the feed pipe 5 on the cylindrical inner wall formed by the multiple pole frames 2 to the distribution chamber 3 located in the middle. The distribution chamber 3 is then distributed along the distribution pipe 6 to different groups of reaction chambers 4 to participate in the electrolysis reaction. The produced hydrogen and oxygen are respectively delivered along the first discharge pipe 7 and the second discharge pipe 8 to the first discharge port 12 and the second discharge port 13 on the two side pressure plates 1 before being output. Through the distribution of the distribution chamber 3 and the distribution pipe 6, the alkali solution can be distributed from the distribution chamber 3 to different groups of reaction chambers 4 in parallel, shortening the path and time for the alkali solution to reach the reaction chambers 4 on both sides, so as to achieve uniform flow of the alkali solution to each group of reaction chambers 4, thereby improving the flow direction of the alkali solution within the entire electrolytic cell, achieving more uniform flow of the alkali solution, and further making the temperature of the reaction chambers 4 more uniform, avoiding excessive alkali solution temperature in the reaction chamber 4 causing local high temperature and partial burn-through of the diaphragm.

[0052] The present embodiment does not specifically limit the reaction chamber 4. To conform to the actual situation, a plurality of reaction chambers 4 are provided in the present embodiment. For example, the total number of reaction chambers 4 is 360, and the number of reaction chambers 4 on both sides is 180 respectively. The reaction chambers 4 on each side are divided into 3 groups, and each group of reaction chambers 4 has 60 reaction chambers 4. In some other embodiments not shown, the reaction chambers 4 on each side can be divided into other numbers of groups, such as 4 groups, 5 groups... or n groups, etc., and the number of reaction chambers 4 in each group is evenly distributed according to the number of groups.

[0053] The present embodiment does not impose any specific limitation on the feeding pipe 5. To comply with the actual situation, two feeding pipes 5 are symmetrically provided in the present embodiment.

[0054] This embodiment does not specifically limit the distribution pipes 6. To accommodate practical situations, multiple distribution pipes 6 are provided in this embodiment. For example, the reaction chambers 4 on each side are divided into three groups, and the distribution pipes 6 are correspondingly divided into three groups. Two distribution pipes 6 are symmetrically provided for each group, and each group of distribution pipes 6 connects from the distribution chambers 3 to the corresponding group of reaction chambers 4. In other embodiments not shown, the number of distribution pipes 6 provided may correspond to the number of groups of reaction chambers 4.

[0055] The present embodiment does not specifically limit the number of the first discharge pipe 7 and the second discharge pipe 8. To conform to the actual situation, in the present embodiment, one first discharge pipe 7 and one second discharge pipe 8 are provided. In some other embodiments not shown, multiple first discharge pipes 7 and second discharge pipes 8 may also be provided.

[0056] like Figure 3 As shown, in this embodiment, the pressing plate 1 is provided with two first feed ports 11 connected to the feed pipe 5, and is also provided with a first discharge port 12 and a second discharge port 13 connected to the first discharge pipe 7 and the second discharge pipe 8 respectively.

[0057] like Figure 2 、 Figures 4 to 8 As shown, in this embodiment, the pole frame 2 includes a first pole frame 21 and a plurality of second pole frames 22 , wherein the first pole frame 21 is located in the middle, and the plurality of second pole frames 22 are symmetrically arranged on both sides of the first pole frame 21 .

[0058] like Figure 4 and Figure 5As shown, the interior of the first pole frame 21 is a first cavity, and the first pole frame 21 is suitable for connecting to the positive electrode. The bottom end of the first pole frame 21 is provided with a plurality of second feed ports 211 connected to the feed pipe 5 and a first distribution port 212 connected to the distribution pipe 6. The inner wall of the first pole frame 21 is provided with a plurality of first connecting holes 213 and second connecting holes 214. The first connecting holes 213 connect the second feed ports 211 and the first cavity. The second connecting hole 214 connects the first distribution port 212 and the first cavity. The top of the first pole frame 21 is provided with a third discharge port 215 connected to the first discharge pipe 7 and a fourth discharge port 216 connected to the second discharge pipe 8. A plurality of first guide grooves 217 are provided on the side wall of the first pole frame 21. The first guide groove 217 connects the first distribution port 212 and the first cavity. At least one second guide groove 218 is provided on the side wall of the first pole frame 21. The second guide groove 218 connects the third discharge port 215 and the first cavity or connects the fourth discharge port 216 and the first cavity, and the first guide groove 217 and the second guide groove 218 are located on the opposite side of the first pole frame 21.

[0059] In this embodiment, the second guide groove 218 connects the third discharge port 215 and the first cavity, and the produced hydrogen is output from the first cavity along the second guide groove 218 to the third discharge port 215. In other embodiments not shown, the second guide groove 218 can connect the fourth discharge port 216 and the first cavity, and the produced oxygen is output from the first cavity along the second guide groove 218 to the fourth discharge port 216.

[0060] like Figures 6 to 8 As shown, the interior of the second pole frame 22 is a second cavity, the second pole frame 22 is suitable for connecting to the negative electrode, the second pole frame 22 is located on both sides of the first pole frame 21, and the plurality of second pole frames 22 are divided into multiple groups, the bottom end of the second pole frame 22 is provided with a plurality of third feed ports 221 connected to the feed pipe 5 and a second distribution port 222 connected to the distribution pipe 6, the third feed port 221 is connected to the second feed port 211, the number of the second distribution ports 222 on each group of the second pole frame 22 is arranged in a decreasing manner in the direction away from the first pole frame 21, the second distribution port 222 is connected to the first distribution port 212, and the top of the second pole frame 22 is provided with a plurality of third feed ports 221 connected to the feed pipe 5 and a second distribution port 222 connected to the distribution pipe 6. The end is provided with a fifth discharge port 223 connected to the first discharge pipe 7 and a sixth discharge port 224 connected to the second discharge pipe 8, a plurality of third guide grooves 225 are provided on the two side walls of the second pole frame 22, the third guide grooves 225 connect the second distribution port 222 and the second cavity, at least one fourth guide groove 226 is provided on the side wall of the second pole frame 22, the fourth guide groove 226 connects the fifth discharge port 223 and the second cavity and connects the sixth discharge port 224 and the second cavity, and the fourth guide groove 226 connecting the fifth discharge port 223 and the sixth discharge port 224 is located on two opposite sides of the second pole frame 22.

[0061] like Figure 9As shown, in this embodiment, two fourth guide grooves 226 are defined on the sidewall of the second pole frame 22. The fourth guide grooves 226 are located on either side of the second pole frame 22. The fourth guide groove 226 on one side connects the fifth discharge port 223 with the second cavity, while the fourth guide groove 226 on the other side connects the sixth discharge port 224 with the second cavity. The produced hydrogen and oxygen are transported from the second cavity along the fourth guide grooves 226 on either side to the fifth discharge port 223 and the sixth discharge port 224, respectively.

[0062] In this embodiment, the first cavity is the distribution chamber 3 , and the second cavity is the reaction chamber 4 .

[0063] The second feed port 211 on the first pole frame 21 and the third feed port 221 on the second pole frame 22 are connected to form a feed pipe 5. The first feed port 11 on the pressure plates 1 on both sides is connected to the third feed port 221 on the second pole frame 22. The first connecting hole 213 defined in the inner wall of the first pole frame 21 allows the alkali solution to be transported from the feed pipe to the first cavity. The second connecting hole 214 in the first pole frame 21 then distributes the alkali solution from the first cavity through the first distribution holes to each group of distribution pipes 6.

[0064] In this embodiment, gaskets are provided between the electrode plate and the first electrode frame 21 and between the electrode plate and the second electrode frame 22 .

[0065] like Figures 6 to 8 As shown, the second distribution ports 222 on the multiple groups of second pole frames 22 away from the first pole frame 21 are higher than the second distribution ports 222 close to the first pole frame 21, that is, the multiple groups of second pole frames 22 are divided into the first group, the second group... and the nth group in sequence from the first pole frame 21 to the pressure plates 1 on both sides. The second distribution ports 222 on the first group of second pole frames 22 are located at the lowest position on the second pole frame 22, and the heights of the second distribution ports 222 on the second group to the nth group are gradually increased, which can make the alkali solution more evenly distributed from the distribution chamber 3 to the multiple groups of reaction chambers 4, avoiding the alkali solution temperature in the reaction chamber 4 that first participates in the reaction when the alkali solution flows through each group of reaction chambers 4 in sequence. When the alkali solution flows through the latter group in sequence, the temperature in the reaction chamber 4 is higher, so that the alkali solution temperature in each reaction chamber 4 is different, resulting in different reaction effects in different reaction chambers 4. The electrolyzer in the present application can evenly distribute the alkali solution to each reaction chamber 4, so that the alkali solution temperature in each reaction chamber 4 is the same, thereby improving the hydrogen production effect.

[0066] like Figure 3 As shown, the pressure plate 1 is further provided with a discharge port 14 connected to the reaction chamber 4. The height of the discharge port 14 is lower than the position of the second feed port 211. The alkaline solution in the alkaline hydrogen production electrolysis cell can be discharged through the discharge port 14.

[0067] like Figure 1As shown, this embodiment also includes a first terminal block 23 provided on the outer wall of the first pole frame 21 and a second terminal block 24 provided on the outer wall of the second pole frame 22. The first terminal block 23 is connected to the positive pole of the power supply, and the second terminal block 24 is connected to the negative pole of the power supply. In this embodiment, the power supply is a DC power supply.

[0068] The present embodiment does not impose any specific limitation on the first wiring board 23 . To comply with the actual situation, two first wiring boards 23 are provided in the present embodiment.

[0069] The present embodiment does not specifically limit the second terminal block 24 . To conform to the actual situation, two second terminal blocks 24 are provided in the present embodiment, which are respectively arranged on the outer wall of the second pole frame 22 adjacent to the pressure plates 1 on both sides.

[0070] like Figure 3 As shown, a plurality of mounting holes 15 are provided on the pressing plate 1 , and a plurality of fixing components 9 are detachably mounted in the mounting holes 15 on the two pressing plates 1 .

[0071] In this embodiment, the fixing assembly 9 includes a pull rod 91, a nut 92 and a butterfly spring piece. The pull rod 91 is installed in the mounting hole 15. Both ends of the pull rod 91 are provided with threads. The nuts 92 are installed at both ends of the pull rod 91. The butterfly spring piece is sleeved on the pull rod 91 and is located between the nut 92 and the pressure plate 1. The pressure plate 1 and the pole frame 2 can be firmly installed through the fixing assembly 9, which increases the stability of the electrolytic cell and is also convenient for subsequent maintenance and inspection. The pressure plate 1 and the pole frame 2 can be disassembled by disassembling the fixing assembly 9.

[0072] Example 2

[0073] The present invention also provides an alkaline hydrogen production system, which uses the alkaline hydrogen production electrolyzer in Example 1.

[0074] In this embodiment, a circulator and a gas-liquid separator are further included. The circulator connects the feed ports on the two pressing plates 1 and the gas-liquid separator. The gas-liquid separator is connected to the first discharge port 12 and the second discharge port 13 .

[0075] Direct current is passed through the first terminal board 23 and the second terminal board 24, and pure water in the alkaline solution is electrolyzed in each reaction chamber 4, hydrogen is generated on the negative electrode side and oxygen is generated on the positive electrode side. The generated oxygen alkaline solution and hydrogen alkaline solution mixture are output from the first discharge port 12 and the second discharge port 13 to the gas-liquid separator to obtain crude hydrogen and crude oxygen products. The separated alkaline solution is re-input into the alkaline hydrogen production electrolytic cell through the circulator to meet the needs of continuous electrolysis. At the same time, the amount of pure water consumed by electrolysis is replenished according to the water level of the gas-liquid separator.

[0076] This alkaline hydrogen production system distributes the alkali solution from the distribution chamber 3 and the distribution pipe 6 in parallel to the reaction chambers 4 of different groups, shortening the path and time for the alkali solution to reach the reaction chambers 4 on both sides, so as to achieve uniform flow of the alkali solution to each group of reaction chambers 4, thereby improving the flow direction of the alkali solution in the entire electrolytic cell, so as to achieve more uniform flow of the alkali solution, further making the temperature of the reaction chamber 4 more uniform, and avoiding excessively high alkali solution temperature in the reaction chamber 4 causing local high temperature and local burning through of the diaphragm.

[0077] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An alkaline hydrogen production electrolyzer, characterized in that: include: Two pressing plates (1) and a plurality of pole frames (2) arranged between the two pressing plates (1), the plurality of pole frames (2) forming a cylindrical side wall, adjacent pole frames (2) being separated by a diaphragm to form a plurality of chambers, the plurality of chambers including a distribution chamber (3) located in the middle, and reaction chambers (4) located on both sides of the distribution chamber (3), the reaction chamber (4) being provided with a pole plate, and the side wall also being provided with a feed pipe (5), a distribution pipe (6), a first discharge pipe (7) and a second discharge pipe (8), One end of the feed pipe (5) forms a first feed port (11) on the pressing plate (1), and the other end is communicated with the distribution chamber (3); the distribution pipe (6) is communicated with the distribution chamber (3) and the plurality of reaction chambers (4); the first discharge pipe (7) and the second discharge pipe (8) form a first discharge port (12) and a second discharge port (13) on the pressing plate (1), and the first discharge pipe (7) and the second discharge pipe (8) are both communicated with the plurality of reaction chambers (4); The pole frame (2) comprises a first pole frame (21) and a second pole frame (22); The first pole frame (21) has a first cavity inside. The first pole frame (21) is suitable for connecting to the positive electrode. The bottom end of the first pole frame (21) is provided with a plurality of second feed ports (211) connected to the feed pipe (5) and a first distribution port (212) connected to the distribution pipe (6). The inner wall of the first pole frame (21) is provided with a plurality of first communicating holes (213) and second communicating holes (214). The first communicating holes (213) are connected to the second feed ports (211) and the first cavity, and the second communicating holes (214) are connected to the first distribution port (212) and the first cavity. The top end of the first pole frame (21) is provided with a first discharge pipe (7). a third discharge port (215) and a fourth discharge port (216) connected to the second discharge pipe (8); a plurality of first guide grooves (217) are provided on the side wall of the first pole frame (21); the first guide grooves (217) are connected to the first distribution port (212) and the first cavity; at least one second guide groove (218) is provided on the side wall of the first pole frame (21); the second guide groove (218) is connected to the third discharge port (215) and the cavity or to the fourth discharge port (216) and the first cavity; and the first guide groove (217) and the second guide groove (218) are located on opposite sides of the first pole frame (21); The plurality of second pole frames (22) have a second cavity inside, and the second pole frames (22) are suitable for being connected to the negative pole. The second pole frames (22) are located on both sides of the first pole frame (21), and the plurality of second pole frames (22) are divided into a plurality of groups. The bottom end of the second pole frame (22) is provided with a plurality of third feed ports (221) connected to the feed pipe (5) and a second distribution port (222) connected to the distribution pipe (6). The second distribution port (222) away from the first pole frame (21) is higher than the second distribution port (222) close to the first pole frame (21). The third feed port (221) is connected to the second feed port (211). The number of the second distribution ports (222) on each group of the second pole frames (22) is arranged to decrease in a direction away from the first pole frame (21). The second distribution ports (222) are arranged to decrease in a direction away from the first pole frame (21). 2) is connected to the first distribution port (212), a fifth discharge port (223) connected to the first discharge pipe (7) and a sixth discharge port (224) connected to the second discharge pipe (8) are provided at the top of the second pole frame (22), a plurality of third guide grooves (225) are provided on both side walls of the second pole frame (22), the third guide grooves (225) connect the second distribution port (222) and the second cavity, at least one fourth guide groove (226) is provided on the side wall of the second pole frame (22), the fourth guide groove (226) connects the fifth discharge port (223) and the second cavity and connects the sixth discharge port (224) and the second cavity, and the fourth guide groove (226) connecting the fifth discharge port (223) and the sixth discharge port (224) is located on two opposite sides of the second pole frame (22).

2. The alkaline hydrogen production electrolyzer according to claim 1, characterized in that Also includes: A gasket is provided between the pole plate and the first pole frame (21) and between the pole plate and the second pole frame (22).

3. The alkaline hydrogen production electrolyzer according to claim 1, characterized in that The pressure plate (1) is further provided with a discharge port (14), the discharge port (14) being in communication with the reaction chamber (4), and the height of the discharge port (14) being lower than the position of the second feed port (211).

4. The alkaline hydrogen production electrolyzer according to any one of claims 1 to 3, characterized in that: Also includes: A first terminal block (23) is provided on the outer wall of the first pole frame (21); The second terminal block (24) is arranged on the outer wall of the second pole frame (22).

5. The alkaline hydrogen production electrolyzer according to claim 4, characterized in that: The pressing plate (1) is provided with a plurality of mounting holes (15), and the fixing assembly (9) is detachably mounted in the mounting holes (15) on the two pressing plates (1).

6. The alkaline hydrogen production electrolyzer according to claim 5, characterized in that The fixing assembly (9) comprises: A pull rod (91) is installed in the installation hole (15), and threads are provided at both ends of the pull rod (91); Nuts (92) are mounted on both ends of the pull rod (91); The butterfly-shaped spring piece (93) is sleeved on the pull rod (91) and is located between the nut (92) and the pressure plate (1).

7. An alkaline hydrogen production system, characterized in that: The invention comprises the alkaline hydrogen production electrolyzer according to any one of claims 1 to 6.

8. The alkaline hydrogen production system according to claim 7, characterized in that: Also includes: a circulator, communicating with the feed ports (11) on the two pressing plates (1); A gas-liquid separator is connected to the first discharge port (12), the second discharge port (13) and the circulator.

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