阅读说明：本技术 一种碱性水电解槽用极板 (Polar plate for alkaline water electrolyzer ) 是由 李黎 张跃兴 孙岳涛 肖宠 王晓威 李闯 张世渊 郝珍 宋时莉 于 2020-04-10 设计创作，主要内容包括：本发明公开了一种碱性水电解槽用极板,包括：极框和板面；极框为环形板；极框的内环面上设有安装槽,板面的外周嵌入极框的安装槽内；极框上设有进液孔、氢气出气孔和氧气出气孔；氢气出气孔和氧气出气孔分别与极框的中心轴线之间的轴间连线形成设定阈值的角度；进液孔位于氢气出气孔和氧气出气孔与极框的中心轴线之间形成的夹角的角平分线的反向延长线所在的极框上；极框的正反两面分别设置有阳极进液道和阴极进液道；极框的正反两面还分别设置有氢气出气道和氧气出气道,氢气出气道与氢气出气孔连通,氧气出气道与氧气出气孔连通,氢气出气道和氧气出气道之间的夹角等于氢气出气孔和氧气出气孔与极框的中心轴线之间形成的夹角。(The invention discloses a polar plate for an alkaline water electrolyzer, which comprises: a pole frame and a plate surface; the pole frame is an annular plate; the inner ring surface of the pole frame is provided with a mounting groove, and the periphery of the plate surface is embedded into the mounting groove of the pole frame; the pole frame is provided with a liquid inlet hole, a hydrogen outlet hole and an oxygen outlet hole; the hydrogen gas outlet hole and the oxygen gas outlet hole form an angle with a set threshold value with an inter-shaft connecting line between the central axes of the pole frames respectively; the liquid inlet hole is positioned on the polar frame where the reverse extension line of the bisector of the angle formed between the hydrogen outlet hole and the central axis of the polar frame and the oxygen outlet hole and the central axis of the polar frame are positioned; the positive and negative surfaces of the pole frame are respectively provided with an anode liquid inlet channel and a cathode liquid inlet channel; the positive and negative two sides of the pole frame are respectively provided with a hydrogen outlet channel and an oxygen outlet channel, the hydrogen outlet channel is communicated with the hydrogen outlet hole, the oxygen outlet channel is communicated with the oxygen outlet hole, and the included angle between the hydrogen outlet channel and the oxygen outlet channel is equal to the included angle formed between the hydrogen outlet hole and the central axis of the pole frame and the included angle formed between the oxygen outlet hole and the central axis of the pole frame.)

1. An electrode plate for an alkaline water electrolyzer, characterized by comprising: a pole frame (1) and a plate surface (2); the plate surface (2) is a metal plate with a set thickness, and the pole frame (1) is an annular plate formed by injection molding or die pressing of engineering plastics;

an installation groove is formed in the inner ring surface of the pole frame (1), and the periphery of the plate surface (2) is embedded into the installation groove of the pole frame (1);

the pole frame (1) is provided with a liquid inlet hole (7), a hydrogen outlet hole (5) and an oxygen outlet hole (3), which are all through holes, and the axes of the holes are parallel to the central axis of the pole frame (1); the hydrogen outlet hole (5) and the oxygen outlet hole (3) form an angle with a set threshold value with an inter-shaft connecting line between the central axes of the pole frames (1); the liquid inlet hole (7) is positioned on the polar frame (1) on which the reverse extension line of the bisector of the angle formed between the hydrogen outlet hole (5) and the central axis of the polar frame (1) and the oxygen outlet hole (3) is positioned;

the positive and negative surfaces of the pole frame (1) are respectively provided with an anode liquid inlet channel (8) and a cathode liquid inlet channel (9), the anode liquid inlet channel (8) and the cathode liquid inlet channel (9) are parallel to each other, and the anode liquid inlet channel (8) and the cathode liquid inlet channel (9) are both communicated with the liquid inlet hole (7);

the positive and negative two sides of utmost point frame (1) still are provided with hydrogen ventiduct (6) and oxygen ventiduct (4) respectively, hydrogen ventiduct (6) and hydrogen ventiduct (5) intercommunication, oxygen ventiduct (4) and oxygen ventiduct (3) intercommunication, contained angle between hydrogen ventiduct (6) and oxygen ventiduct (4) equals the contained angle that forms between the central axis of hydrogen ventiduct (5) and oxygen ventiduct (3) and utmost point frame (1).

2. The polar plate for the alkaline water electrolyzer of claim 1, characterized in that the engineering plastic is made of polysulfone or polyethersulfone or polyetheretherketone or polyphenylene sulfide.

3. The polar plate for an alkaline water electrolyser as claimed in claim 1, characterized in that more than one conductive material is added to the polar frame (1) for forming a conductive polar frame.

4. The plate for an alkaline water electrolyser as claimed in claim 3 wherein said conductive material comprises: carbon nanotubes, graphene, polyaniline, polypyrrole, and polythiophene.

5. The electrode plate for an alkaline water electrolyzer of claim 3, characterized in that the proportion of the conductive material added is 10 to 30% by weight of the electrode frame (1).

6. The polar plate for an alkaline water electrolyzer of claim 1, characterized in that the included angle formed between the hydrogen gas outlet holes (5) and the oxygen gas outlet holes (3) and the central axis of the polar frame (1) is less than or equal to 30 °.

7. The polar plate for an alkaline water electrolyzer of claim 1, characterized in that the flow channel cross sections of the oxygen outlet channel (4), the hydrogen outlet channel (6), the anode inlet channel (8) and the cathode inlet channel (9) are all rectangular.

Technical Field

The invention relates to the technical field of alkaline water electrolysis hydrogen production equipment, in particular to a polar plate for an alkaline water electrolysis cell.

Background

The alkaline electrolytic bath is the core of alkaline water electrolysis hydrogen production equipment, and generally comprises a plurality of electrolytic cells to dozens of electrolytic cells connected in series, and each electrolytic cell comprises components such as a polar plate, an electrode, a diaphragm, a sealing gasket and the like. Wherein, the polar plate is a supporting component of the alkaline electrolytic cell and plays a role in supporting the electrode and the diaphragm and conducting electricity. At present, the polar plate of the alkaline electrolytic cell in the prior art is generally made of cast iron metal plate, nickel plate or stainless steel metal plate by machining, and the machining process is multiple and the manufacturing cost is high. The electrolytic cell assembled by the polar plates not only has heavy weight, but also needs to be careful to avoid the possible short circuit problem among the polar plates. In addition, due to the harsh working condition environment of the alkaline electrolytic cell, the polar frame part of the polar plate is easy to corrode, and the normal operation of the electrolytic cell is influenced.

Disclosure of Invention

In view of the above, the present invention provides a polar plate for an alkaline water electrolyzer, which is divided into a plate surface and a polar frame, wherein the plate surface uses a thin metal plate as a support member and a conductor, and the polar frame is formed by injection molding or mold pressing of engineering plastics, such that polar plate processing procedures can be significantly reduced, processing efficiency can be improved, electrolytic tank weight and cost can be effectively reduced, and corrosion of the polar frame can be avoided.

The technical scheme of the invention is as follows: an electrode plate for an alkaline water electrolyzer, comprising: a pole frame and a plate surface; the plate surface is a metal plate with a set thickness, and the polar frame is an annular plate formed by injection molding or die pressing of engineering plastics;

an installation groove is formed in the inner ring surface of the pole frame, and the periphery of the plate surface is embedded into the installation groove of the pole frame;

the pole frame is provided with a liquid inlet hole, a hydrogen outlet hole and an oxygen outlet hole which are all through holes, and the axes of the holes are parallel to the central axis of the pole frame; the hydrogen outlet hole and the oxygen outlet hole form an angle with a set threshold value with an inter-shaft connecting line between the central axes of the pole frames respectively; the liquid inlet hole is positioned on the polar frame where the reverse extension line of the bisector of the angle formed between the hydrogen outlet hole and the central axis of the polar frame and the oxygen outlet hole and the central axis of the polar frame are positioned;

the positive and negative surfaces of the pole frame are respectively provided with an anode liquid inlet channel and a cathode liquid inlet channel which are parallel to each other, and the anode liquid inlet channel and the cathode liquid inlet channel are both communicated with the liquid inlet hole;

the positive and negative two sides of utmost point frame still are provided with hydrogen gas off-gas channel and oxygen gas off-gas channel respectively, hydrogen gas off-gas channel and hydrogen venthole intercommunication, oxygen gas off-gas channel and oxygen venthole intercommunication, contained angle between hydrogen gas off-gas channel and the oxygen gas off-gas channel equals the contained angle that forms between the central axis of hydrogen gas off-gas hole and oxygen venthole and utmost point frame.

Preferably, the engineering plastic is made of polysulfone, polyethersulfone, polyetheretherketone or polyphenylene sulfide.

Preferably, more than one conductive material is added to the pole frame for forming the conductive pole frame.

Preferably, the conductive material includes: carbon nanotubes, graphene, polyaniline, polypyrrole, and polythiophene.

Preferably, the adding proportion of the conductive material is 10-30% of the weight of the polar frame.

Preferably, the included angle formed between the hydrogen outlet holes and the central axis of the pole frame and the included angle formed between the oxygen outlet holes and the central axis of the pole frame are less than or equal to 30 degrees.

Preferably, the cross sections of the oxygen outlet channel, the hydrogen outlet channel, the anode inlet channel and the cathode inlet channel are all rectangular.

Has the advantages that:

the polar plate comprises a plate surface and a polar frame which can be integrally formed, wherein the plate surface adopts a thin metal plate as a support piece and a conductor, the polar frame is formed by injection molding or mould pressing of engineering plastics, the polar plate processing procedures can be obviously reduced, the processing efficiency is improved, the weight and the cost of the electrolytic cell are effectively reduced, meanwhile, the polar plate used in the alkaline water electrolysis cell replaces the polar plate in the prior art, the problem that the metal polar frame of the traditional polar plate is easy to corrode can be effectively avoided, the weight and the cost of equipment are reduced, and better economic benefits are generated.

Drawings

Figure 1 is a top view of a plate of the present invention.

Fig. 2 is a sectional view taken along line a-a in fig. 1.

Fig. 3 is a bottom view of a plate of the present invention.

The device comprises a pole frame, a pole face, an oxygen outlet hole, an oxygen outlet channel, a hydrogen outlet hole, a hydrogen outlet channel, a liquid inlet hole, an anode liquid inlet channel, a cathode liquid inlet channel and a cathode liquid inlet channel, wherein the pole frame is 1, the pole face is 2, the pole face is 3.

Detailed Description

The invention is described in detail below by way of example with reference to the accompanying drawings.

The embodiment provides a polar plate for alkaline water electrolysis tank, divide into face and utmost point frame two parts with the polar plate, the face adopts the sheet metal board as support piece and electric conductor, and utmost point frame adopts engineering plastics to mould plastics or mould pressing to form, can show and reduce polar plate manufacturing procedure, improve machining efficiency, effectively reduce the weight and the cost of electrolysis tank, simultaneously, can avoid the corruption problem of utmost point frame.

As shown in fig. 1-3, the plate comprises: a pole frame 1 and a plate surface 2; the plate surface 2 is a thin metal plate (such as a cast iron plate, a nickel plate or a stainless steel plate) and the pole frame 1 is a ring-shaped plate formed by injection molding or die pressing of engineering plastics (such as organic insulators of polysulfone, polyether sulfone, polyether ether ketone or polyphenylene sulfide and the like, which is beneficial to avoiding the short circuit problem and the corrosion problem which can occur to the pole frame 1, and the organic insulators have high hardness and low density, can meet the strength requirement of an electrolytic cell on the pole plate and reduce the weight of the pole plate), in particular, more than one of conductive materials such as carbon nano tubes, graphene, polyaniline, polypyrrole, polythiophene and the like are added into the pole frame 1 to form a conductive pole frame, and working condition parameters such as cell voltage and the like of the electrolytic cell can be directly measured through the pole frame 1, so that the simple practicability of the electrolytic cell is obviously enhanced; the adding proportion of the conductive material is 10-30% of the weight of the pole frame 1, so that the pole frame 1 can conduct electricity, the hardness, the strength, the elasticity and the like are not influenced, and the weight of the pole plate is not increased remarkably;

an annular mounting groove is formed in the inner annular surface of the pole frame 1, the periphery of the plate surface 2 is embedded into the annular mounting groove of the pole frame 1, and the pole frame 1 can fix the plate surface 2 in the annular mounting groove and is favorable for enhancing the sealing property of the pole plate;

the pole frame 1 is provided with a liquid inlet hole 7, a hydrogen outlet hole 5 and an oxygen outlet hole 3, the liquid inlet hole 7, the hydrogen outlet hole 5 and the oxygen outlet hole 3 are all through holes, and the axes of the holes are all parallel to the central axis of the pole frame 1; the hydrogen gas outlet 5 and the oxygen gas outlet 3 respectively form an angle with a set threshold value with an interaxial connecting line between the central axes of the polar frames 1 (particularly, the angle is less than or equal to 30 degrees, and the overlarge angle is easy to generate gas accumulation and affects the gas production, safety and working stability of the electrolytic cell), and the liquid inlet 7 is positioned on the polar frame 1 on which a reverse extension line of an angular bisector of an included angle formed between the hydrogen gas outlet 5 and the central axes of the oxygen gas outlet 3 and the polar frames 1 is positioned;

the positive and negative surfaces of the pole frame 1 are respectively provided with an anode liquid inlet channel 8 and a cathode liquid inlet channel 9 which are parallel to each other, and the anode liquid inlet channel 8 and the cathode liquid inlet channel 9 are both communicated with the liquid inlet hole 7;

the positive and negative two sides of the pole frame 1 are also respectively provided with a hydrogen gas outlet channel 6 and an oxygen gas outlet channel 4, the hydrogen gas outlet channel 6 is communicated with a hydrogen gas outlet hole 5, the oxygen gas outlet channel 4 is communicated with an oxygen gas outlet hole 3, and an included angle between the hydrogen gas outlet channel 6 and the oxygen gas outlet channel 4 is equal to an included angle formed between the hydrogen gas outlet hole 5 and the central axis of the pole frame 1 and between the oxygen gas outlet hole 3 and the central axis of the pole frame 1.

When in use, the polar plate is used for assembling an electrolytic cell, the polar plate, an electrode, a diaphragm and other components are stacked according to a set sequence, and simultaneously, the liquid inlet hole 7, the hydrogen outlet hole 5 and the oxygen outlet hole 3 of the adjacent polar plate are ensured to be respectively aligned; the sealing gasket is arranged between the adjacent polar plates, so that the sealing performance of the electrolytic cell can be further improved;

wherein, the liquid inlet hole 7 is used for leading external electrolyte into the electrolytic cell, and the anode liquid inlet channel 8 and the cathode liquid inlet channel 9 are respectively used for conveying the electrolyte to the anode side and the cathode side of the electrolytic cell; the hydrogen outlet holes 5 and the hydrogen outlet channels 6 are used for leading out products (such as hydrogen-rich water and/or hydrogen) on the cathode side of the electrolytic cell; oxygen outlet holes 3 and oxygen outlet channels 4 are used for leading out products (such as oxygen-containing water and/or oxygen) on the anode side of the electrolytic cell; the cross sections of the oxygen outlet channel 4, the hydrogen outlet channel 6, the anode inlet channel 8 and the cathode inlet channel 9 are all rectangular, and the cross sections are larger than the theoretical area obtained by process calculation, so that the problem of gas accumulation caused by dry burning or unsmooth exhaust due to water shortage of the electrolytic cell is avoided.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.