Method for tail gas dust collection and discharging in production of titanium tetrachloride

Abstract

The invention discloses a method for tail gas dust collection and discharging in production of titanium tetrachloride, wherein the method includes the steps: (1) nitrogen gas and tail gas are supplied to a cyclone dust collector and are subjected to gas-solid separation process, so as to separate to obtain gaseous titanium tetrachloride and dust containing high titanium slag and petroleum coke; and (2) an electric trace heating element and a rotary discharging valve on a discharging pipeline are opened, a pipeline seal nitrogen gas inlet and a rotary valve seal nitrogen gas inlet on the discharging pipeline are opened, at the same time, after a No.1 valve is opened for a predetermined time, the No.1 valve is closed, a No.2 valve is opened for a predetermined time, the dust containing the high titanium slag and the petroleum coke is supplied to a dust pulping tank through the discharging pipeline and is mixed and pulped with diluted hydrochloric acid, and moreover, every once in a while, a nitrogen gas gun is operated for one time to purge the discharging pipeline. The method can solve the problems of blockage of a dust collection and discharging pipeline and easily jamming of a discharging valve in the process of boiling chlorination production of titanium tetrachloride, so as to ensure the stability of production process of titanium tetrachloride.

Description

technical field [0001] The invention belongs to the technical field of titanium dioxide production. Specifically, the invention relates to a method for dust collection and blanking of tail gas in the production of titanium tetrachloride. Background technique [0002] The boiling chlorination method has a short process flow, good continuity, less waste residue, waste water, and waste gas discharge, and low production cost. The refined titanium tetrachloride produced is mainly for the production of rutile titanium dioxide. However, since the chlorination method of titanium dioxide is still in its infancy, the main difficulties are that the production technology is difficult and the level of automation control is high. [0003] In the process of producing titanium tetrachloride using a large-scale fluidized chlorination furnace with upper slag discharge, high-titanium slag (rutile) and petroleum coke react with chlorine gas in a boiling state in the fluidized chlorination furna...

AI Technical Summary

Problems solved by technology

For this reason, an object of the present invention is to propose a kind of tail gas dust collection and blanking method in the production of titanium tetrachloride, the method can solve the dust collection blanking pipeline blockage and the blanking pipeline in the process of producing titanium tetrachloride by boiling chlorination. The problem that the material valve is easy to be stuck, thus ensuring the stability of the production process of titanium tetrachloride

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