Cathode structure of ionic membrane electrolytic cell

Abstract

The invention discloses a cathode structure of an ionic membrane electrolytic cell. The cathode structure comprises a vertically arranged cathode chassis and a cathode rib plate connected in a cathodechamber in the cathode chassis, a cathode liquid inlet dispersion pipe is arranged at the lower part of the cathode chamber, and a cathode bottom net assembly, an elastic net and a cathode surface net are sequentially coated outwards on a disc opening of the cathode chassis; the cathode bottom net assembly comprises an upper cathode circulating net plate, a middle cathode circulating plate and alower cathode circulating net plate which are sequentially connected according to the upper position, the middle position and the lower position; wherein the lower end of the middle cathode circulating plate is provided with a bending section which is bent towards the direction of the inner plate bottom of the cathode base plate, and the upper end of the lower cathode circulating screen plate is connected to the bending vertex angle position of the middle cathode circulating plate. The service life of an ionic membrane is prolonged, the voltage of an electrolytic bath is reduced, and the energy consumption and the production cost of the electrolytic bath are reduced.

Description

technical field [0001] The invention relates to the technical field of electrolytic cells, in particular to a cathode structure of an ion-exchange membrane electrolytic cell. Background technique [0002] Ion membrane electrolyzer is generally composed of anode chamber, anode, cathode chamber, cathode, etc., and an ion membrane is used to separate the anode chamber and cathode chamber. Its working principle is as follows: the saturated brine that has been refined twice is added to the anode chamber of the electrolytic cell. In the electrified state, sodium chloride is ionized into sodium ions and chloride ions, and the chloride ions in the solution are discharged at the anode to generate chlorine gas from the solution. The saturated brine that consumes part of the sodium chloride becomes light brine and flows out of the electrolytic cell, while the sodium ions move to the cathode through the ion membrane. At the same time, pure water is added to the cathode chamber of the e...

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Problems solved by technology

[0003] The ion-exchange membrane cell in the prior art also has the following problems when in use: one is that the pressure fluctuation inside the ion-exchange membrane electrolyzer is relatively large, resulting in a shorter service life of the ion-exchange membrane; the other is that the electrolyte concentration in the ion-exchange membrane cell is not Uniformity, and there is more gas retention in the electrolytic cell, which makes the voltage of the cell during the electrolysis process higher, resulting in greater energy consumption and higher production costs

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