Filter-press type water electrolyzer

Abstract

The invention belongs to an electrolysis device for producing hydrogen, in particular to a filter-pressing water electrolyser tank applied in the industry of hydrogen production with water electrolysis. Flexible metal or a netty main anode 7 knitted with metal wire, a netty auxiliary anode 8 and an anode support component 9 which is provided with a vented mesh to allow the passing of liquid and the function of elastic expansion are arranged in the anode room 6 of anode half groove 1 and bipolar unit groove 3; and flexible metal or a netty main cathode 11 knitted with metal wire, a netty auxiliary cathode 12 and an cathode support component 13 which has a vented mesh to allow the passing of liquid and the function of elastic expansion are arranged in the cathode room 10 of anode half groove 2 and bipolar unit groove 3; and the main anode 7 and the main cathode 11 are mounted in a film-type pole distance. The invention has a simple structure, convenient manufacture and maintenance, high hydrogen purity, small size and light weight; the voltage in the unit groove is 1.9 to 2.2v, the current efficiency is above 99 percent, the consumption of direct current is 4.5 to 5.0KW.h / Nm3H2 and the purity of hydrogen is 99.99 to 99.999 percent.

Description

Technical field [0001] The invention belongs to a water electrolysis hydrogen production device, in particular to a pressure filter type water electrolysis cell used in the water electrolysis hydrogen production industry. Background technique [0002] In the water electrolysis hydrogen production industry, the widely used water electrolysis hydrogen production device is generally the main electrode made of a perforated plate, the cathode and anode chamber separator plates are used as the auxiliary electrode, and the supporting structure of the electrode is a concave-convex plate stamped and formed by a mold. This structure has the following disadvantages: [0003] 1. The perforated plate electrode is a rigid flat plate electrode. The actual processing and assembly process is not easy to ensure a small flatness and a good parallelism between the cathode and the anode, resulting in a gap between the cathode and the anode, resulting in uneven pole spacing. The uniformity of th...

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Problems solved by technology

[0003] 1. The perforated plate electrode is a rigid flat plate electrode. The actual processing and assembly process is not easy to ensure a small flatness and a good parallelism between the cathode and the anode, resulting in a gap between the cathode and the anode, resulting in uneven pole spacing. The uniformity of the current cannot be guaranteed, which limits the increase of the current density to a certain extent

[0004] 2. The perforated plate electrode does not have ideal gas diffusion channels and liquid circulation channels, so it is not conducive to the diffusion of gas and the circulation of liquid, resulting in an increase in the aeration of the electrolyte, which is not conducive to the electrolytic reaction

[0005] 3. The supporting structure of concave-convex plate electrode is complicated, and it needs a mold with high forming precision and a large-tonnage press to complete it. It is difficult to manufacture and the production cost is high.

[0006] 4. Due to the limited number of concave-convex plate electrode supports, the contact area with the perforated plate electrode is limited, which limits the further increase of current density

[0007] 5. The supporting structure of concave-convex disk electrodes requires that the cathode and anode should have certain rigidity and strength, otherwise the pressure difference between the cathode and anode sides will cause permanent deformation of the electrodes, resulting in abnormal operation of the equipment

[0008] 6. The supporting structure of the perforated plate electrode and the concave-convex plate electrode is a rigid rigid structure, resulting in a certain gap between the cathode and anode and the diaphragm

This undoubtedly increases the voltage drop of the electrolyte in the electrolysis process and increases energy consumption.

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