Electrolysis system with ion membrane electrolyzer and pressure regulating method thereof

Abstract

The invention discloses an electrolysis system with an ion membrane electrolyzer and a pressure regulating method thereof. The gas pressure fluctuation in the ion membrane electrolyzer is small when the chlorine pressure and hydrogen pressure in the ion membrane electrolyzer are regulated. The electrolysis system mainly adopts a chlorine pressure regulating device and a hydrogen pressure regulating device for adjustment, the chlorine pressure regulating device comprises a first chlorine regulating valve on a pipeline between a water trap and a drying device and a second chlorine regulating valve on a waste gas recycling branch pipe; and the hydrogen pressure regulating device comprises a first hydrogen regulating valve arranged between a hydrogen washing tower and a hydrogen compressor on a hydrogen recycling branch pipe and a second hydrogen regulating valve arranged on a hydrogen emptying branch pipe.

Description

technical field [0001] The invention relates to an electrolysis system containing an ion membrane electrolyzer and a voltage regulating method of the electrolysis system. Background technique [0002] At present, an electrolysis system containing an ion-exchange membrane electrolyzer is generally used in the production of chlor-alkali. The electrolysis system generally includes an ion-exchange membrane electrolyzer, and the ion-exchange membrane electrolyzer is equipped with a two-way recovery system, such as figure 1 As shown, one path is a chlorine gas recovery system, and the other path is a hydrogen gas recovery system. The chlorine gas recovery system includes a chlorine gas scrubber, a cooling device, a water trap, a drying device, an acid trap and a chlorine gas compressor connected in sequence through pipelines. The machine also includes a chlorine gas pressure regulating device, which is a regulating valve installed on the main line between the ion-exchange membrane...

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Problems solved by technology

However, the above-mentioned structure has the following disadvantages: When adjusting the pressure of chlorine gas and hydrogen gas through the above-mentioned two regulating valves, the air pressure fluctuates too much, and the ion membrane is often damaged due to the excessive adjustment of the air pressure, which makes the ion membrane close to the cathode side.

At present, the way to solve the above problems is to precisely adjust the opening of the above two regulating valves, but the effect is not ideal, and the ion membrane is still often damaged due to excessive pressure fluctuations.

Moreover, since the chlorine gas from the ion-exchange membrane electrolyzer contains a large amount of water, the water will accumulate at the regulating valve, and will corrode the regulating valve, so that the sensitivity of the regulating valve will be significantly reduced, and the air pressure will fluctuate even more.

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