System for recovering chlorine gas in titanium dioxide production process and recovery method thereof

Abstract

The invention discloses a system for recovering chlorine gas from a titanium dioxide production process and a recovery method thereof, comprising a gas-solid separator, a powder output end of the gas-solid separator connected to a powder collection device, and a gas output end of the gas-solid separator Connect the CCl4 liquid tank, the liquid output end of the CCl4 liquid tank is connected to the degassing recovery unit, the gas output end of the CCl4 liquid tank is connected to the tail gas treatment unit, the degassing recovery unit is used for degassing the CCl4 liquid, and the gas of the degassing recovery unit The output end is connected to the chlorine gas recovery tank, and the liquid output end of the degassing recovery unit is connected to the CCl4 liquid tank. The invention mainly solves the problems of low recovery efficiency, large amount of absorbent, large amount of waste liquid and insufficient chlorine gas purity in the traditional recovery process. By optimizing the chlorine gas recovery system and improving the chlorine gas recovery process, the chlorine gas The acquisition amount is greatly increased, the emission of chlorine gas is reduced to the minimum, and the chlorine gas recovery efficiency of the chlorine gas recovery process is improved.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide production, in particular to a system for recovering chlorine gas from a titanium dioxide production process and a recovery method thereof. Background technique [0002] In the production system of titanium dioxide, through TiCl 4 When titanium dioxide is obtained by gas-phase oxidation, a considerable amount of chlorine gas by-products will also be produced. In order to avoid waste of resources, chlorine gas recovery systems are generally installed. However, the recovery efficiency of traditional chlorine gas recovery systems is not high, and the amount of absorbent used is relatively high. Large, large amount of waste liquid produced, insufficient purity of chlorine gas, etc., the exhaust gas still contains a certain amount of chlorine gas, which causes serious environmental pollution. Check key monitoring objects. [0003] Through the investigation and analysis of the production proc...

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Problems solved by technology

[0004] The object of the invention of the present invention is to: aim at the above-mentioned existing problems, provide a kind of system and recovery method thereof from the recovery chlorine gas in the titanium dioxide production process, by optimizing the chlorine gas recovery system, improve the chlorine gas recovery process, to solve the problem that occurs in the traditional recovery process The recovery efficiency is not high, the amount of absorbent is large, the amount of waste liquid generated is large, and the purity of chlorine gas is not enough, etc.

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