Titanium dioxide waste acid recycling and processing system

Abstract

The invention relates to a titanium dioxide waste acid recycling and processing system which has the innovative characteristics that the system mainly comprises a reactor, a cleaning buffer tank, a gas booster, a gas cooler, a defogger, a storage distribution tank and a hydrogen-fired steam boiler, which are arranged in sequence; a material guiding bulge is arranged at the center of a bottom plate of the reactor; an iron powder feeding device provided with a liquid seal, and a liquid level detection component are arranged at the top of the reactor; the hydrogen-fired steam boiler mainly comprises a boiler body, a boiler barrel, a water wall tube, a convection tube bundle, a coal economizer, a hydrogen combustor and a safety pressure release door; hydrogen which is generated by reactions in the reactor and carries a small quantity of water vapor and acidic gas enters the cleaning buffer tank, then enters the gas booster for boosting after foreign gases are removed by an alkali cleaning solution, passes the gas cooler and the defogger to remove moisture, and is stored in the storage distribution tank and distributed to the hydrogen-fired steam boiler to be burnt for preheating. The system has the advantages that the reaction efficiency is high, hydrogen has low possibility of leakage or blast, and the use is safe and reliable.

Description

technical field [0001] The invention relates to a treatment system for recovering and utilizing titanium dioxide waste acid. Background technique [0002] The scientific name of titanium dioxide is titanium dioxide. Titanium dioxide is considered to be the best white pigment in the world at present, accounting for 80% of the total white pigment usage. It is widely used in coatings, plastics, papermaking, printing ink, chemical fiber, rubber , cosmetics and other industries. [0003] At present, there are two manufacturing methods of titanium dioxide: sulfuric acid method (Sulphate Process) and chloride method (Chloride Process). At present, domestic titanium dioxide manufacturers mainly use the sulfuric acid method, which is to produce titanium oxysulfate through acidolysis reaction of ferrotitanium powder and concentrated sulfuric acid, which is hydrolyzed to generate metatitanic acid, and then calcined and crushed to obtain titanium dioxide products. Anatase and rutile t...

AI Technical Summary

Problems solved by technology

During the reaction of iron powder and dilute sulfuric acid to produce ferrous sulfate, a large amount of hydrogen will be produced as a by-product, and hydrogen is flammable and explosive, which affects the reactions involved in the recovery and reuse process and the safety performance of combustion equipment The requirements are very high. In addition, when the iron powder reacts with the waste acid, it is easy to deposit at the bottom of the reactor, which cannot fully react and reduces the reaction efficiency.

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