Method of recovering waste sulfuric acid and waste gas produced in tatanium dioxide production

A technology of production process and recovery method, applied in the direction of separation method, chemical instrument and method, sulfur compound, etc., can solve problems such as furnace exhaust gas and waste acid pollution

Inactive Publication Date: 2005-04-27
冯圣君
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  • Abstract
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Problems solved by technology

[0003] The object of the present invention is to provide a kind of waste sulfuric acid and waste gas produced in the production process of titanium dioxide that can not only effe

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  • Method of recovering waste sulfuric acid and waste gas produced in tatanium dioxide production

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Embodiment

[0015] ① Send the kiln waste gas and waste sulfuric acid produced in the production process of titanium dioxide to the "titanium dioxide kiln tail gas enrichment and sulfuric acid graphite tower" (using Chinese patent: ZL01217393.2 structure form) for mixing, gas-liquid contact, and concentration. And further into the gas-liquid separator, gas-liquid separation, so that the waste gas takes away part of the water in the acid, and concentrates the acid to a concentration of about 30%. At this time, the acid contains a small amount of titanium dioxide and raw A small amount of titanium dioxide contained in waste acid;

[0016] ②The separated waste acid liquid is sent to the solid-liquid separator to separate the acid from the titanium dioxide contained in it, and the acid liquid obtained after separation enters the steam concentration system for concentration treatment. The steam concentration system has a first-level one-effect steam concentration device 1, a first-level one-eff...

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Abstract

The method of recovering waste sulfuric acid and waste gas produced in titanium dioxide production includes feeding the kiln waste gas and the waste into the graphite tower, where, through mixing, gas-liquid contact and concentration, acid is separated from titanium dioxide, and inorganic salt in the acid solution is crystallized and separated; and further feeding the acid solution into silicon carbide evaporator, where partial water is evaporated in negative pressure state to make the concentration of acid reach 80-90 %. The present invention can eliminate the pollution of waste acid and waste gas while recovering acid for reuse and titanium dioxide.

Description

Technical field: [0001] The invention relates to a method for recycling waste generated in the production process of titanium dioxide. Background technique: [0002] In the existing production process of titanium dioxide, the kiln exhaust gas and waste acid produced not only cannot be further utilized, but also seriously pollute the environment. Invention content: [0003] The object of the present invention is to provide a kind of waste sulfuric acid and waste gas produced in the production process of titanium dioxide that can not only effectively solve the environmental pollution problems of kiln waste gas and waste acid produced in the production process of titanium dioxide, but also recycle it. Recycling method. [0004] Technical solution of the present invention is: [0005] A method for recovering waste sulfuric acid and waste gas produced in the production process of titanium dioxide is characterized in that it comprises the following steps: [0006] ① Send the ...

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Application Information

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IPC IPC(8): B01D53/78C01B17/88C01G23/053
Inventor 冯圣君
Owner 冯圣君
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