Pretreatment process for preparing industrial concentrated sulfuric acid

Abstract

The invention relates to a pretreatment process for preparing industrial concentrated sulfuric acid, which comprises a bottom plate, a shell frame, an air inlet pipe and a filtering device. The shellframe is arranged at the upper end of the bottom plate, the shell frame is of a cylindrical hollow structure, the air inlet pipe is arranged at the lower end of the left side of the shell frame, and the filtering device is arranged in the shell frame. The pretreatment process can solve the problems as follows: when existing equipment is used for filtering gas generated after pyrite roasting, the filtering effect is poor, the filtering is incomplete, impurities in the gas cannot be effectively and completely removed, the impurities are prone to blocking filter screen holes, and the gas filtering effect is affected; and meanwhile, when existing equipment filters gas generated after pyrite roasting, the filtered impurities cannot be effectively collected, the collected impurities are inconvenient to clean, and the using effect of the equipment is affected.

Description

technical field [0001] The invention relates to the field of production and processing of industrial concentrated sulfuric acid, in particular to a pretreatment process for production of industrial concentrated sulfuric acid. Background technique [0002] Sulfuric acid is an important basic chemical raw material and the most important product in the chemical industry. It is mainly used to manufacture inorganic fertilizers, and secondly as a basic chemical raw material for smelting of non-ferrous metals, petroleum refining and petrochemicals, textile printing and dyeing, inorganic salt industry, certain Some inorganic acids and organic acids, rubber industry, paint industry, national defense industry, pesticide medicine, tanning, coking and other industrial sectors are also used for steel pickling. [0003] At present, in the processing process before the production of existing industrial concentrated sulfuric acid, there are following defects usually: 1, when existing equipm...

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Problems solved by technology

[0005] The present invention can solve the problem that the existing equipment has poor filtering effect and incomplete filtering when filtering the gas generated after pyrite roasting, and cannot effectively completely remove the impurities inside the gas, and the impurities are easy to block the filter mesh holes. It affects the gas filtration effect. At the same time, when the existing equipment filters the gas generated after pyrite roasting, it cannot effectively collect the filtered impurities, and the collected impurities are inconvenient to clean, which affects the use effect of the equipment. and other difficult problems

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