Strongly acidic light brine reuse device after decomposition in the chlorate decomposition tank in the electrolysis process

Abstract

The invention relates to the technical field of chlorine-alkaline industry electrolysis techniques and provides a device for recycling strongly-acid light salt brine obtained after chlorate decomposing tank decomposing in the electrolysis technique. The device comprises an anolyte circulating tank, a heat exchanger, a chlorate decomposing tank, a gas-liquid separator and a chlorine water tank. The liquid inlet end and the liquid outlet end are arranged on the upper portion and the lower portion of the anolyte circulating tank correspondingly, a liquid feeding pipe is fixedly connected to the liquid inlet end of the anolyte circulating tank, and a high-purity acid pipe is fixedly connected to the liquid feeding pipe. According to the device for recycling the strongly-acid light salt brine obtained after chlorate decomposing tank decomposing in the electrolysis technique, the structure is reasonable and compact, using is convenient, through matching using of the anolyte circulating tank, the heat exchanger, the chlorate decomposing tank, the gas-liquid separator and the chlorine water tank, the effect that the strongly-acid light salt brine obtained after chlorate decomposing tank decomposing is recycled into the anolyte circulating tank, and the acid adding quantity of anolyte circulating liquid is greatly decreased; and meanwhile, the consuming quantity of self-consumption alkali is greatly decreased, the characteristics of safety and reliability are achieved, operating is convenient, and the production cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of electrolysis technology in the chlor-alkali industry, and relates to a device for reusing strong acid light brine after decomposition in a chlorate decomposition tank in the electrolysis technology. Background technique [0002] In the chlor-alkali industry, when the ionic membrane is running to the later stage, the membrane pinholes increase, the side reactions in the electrolytic tank increase, and the chlorate content in the tank is relatively high. In order to ensure the chlorate content of the brine system, it must be in the chlorate decomposition tank Internally increase the amount of acid added, increase the temperature, carry out sufficient reaction and decomposition, and decompose light brine with high molarity of H ions (acidity between 0.7moL / l and 0.8moL / l). At this stage, our factory has a total of 4 sets of chlorate decomposition tanks. The amount of acid added is 1500L / h, the acidity is 0.7...

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Problems solved by technology

[0005] The invention provides a device for reusing strongly acidic light brine after being decomposed in a chlorate decomposition tank in an electrolysis process, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of strong acidity after decomposition in an existing chlorate decomposition tank. For light salt water, a large amount of alkali needs to be added to the primary salinization salt, which leads to the problem of high production cost

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