Equipment for preparing sulfuric acid

Abstract

The invention discloses equipment for preparing sulfuric acid, comprising an absorption tower, wherein an absorption tower inlet is arranged at the upper part of the absorption tower, an absorption tower outlet is arranged at the lower part of the absorption tower, a gas inlet is arranged at the middle part of the absorption tower, a supporting grate for supporting a hollow ceramic ring group is arranged in the absorption tower, a fusion zone is formed at the middle section of the absorption tower in correspondence to the gas inlet, the supporting grate and the hollow ceramic ring group, a spray zone is formed above the fusion zone in the absorption tower, a collection zone is formed below the fusion zone, a Teflon coating is coated on the inner wall of the absorption tower, and meanwhile, a Teflon coating is also coated on the surface of the supporting grate. The Teflon coating improves the acid resistance of the inner wall of the absorption tower and the supporting grate, avoids the reaction between the metal and sulfuric acid, and blocks metal ions from being separated out, so as to prevent the prepared sulfuric acid from being polluted. The Teflon coating is relatively stable, and does not cause breaking of a protective layer due to collision or pressing, so as to achieve an effective protection effect.

Description

technical field [0001] The invention relates to the technical field of sulfuric acid preparation, in particular to a corrosion-resistant and low-cost equipment for preparing sulfuric acid. Background technique [0002] [0003] Sulfuric acid is an important basic chemical raw material with a wide range of uses. It is often used in the manufacture of ammonium sulfate, superphosphate, aluminum sulfate, titanium dioxide, synthetic drugs, synthetic dyes and synthetic detergents. Sulfuric acid is used as a dehydrating agent and sulfonating agent in the field of organic synthesis, as a pickling agent in metal, enamel and other industries, and in refining petroleum products in the petroleum industry. [0004] The raw materials for producing sulfuric acid include pyrite, sulfur and non-ferrous metal smelting gas, etc. The production methods of sulfuric acid include lead chamber method, tower method and contact method. At present, the contact method is widely used for the p...

AI Technical Summary

Problems solved by technology

[0006] In the prior art, the supporting grate arranged in the absorption tower is generally processed by an enamel process, thereby forming a corrosion-resistant enamel protective layer on the surface of the supporting grate, but the compression resistance of the enamel is not good, and the supporting grate is usually It needs to support 2-3 tons of hollow ceramic rings, so the enamel surface is easily damaged under the weight of the ceramic rings, which affects the acid resistance of the supporting grate, and the reaction of the metal part of the supporting grate with sulfuric acid will also make the preparation Metal ion impurities are produced in the sulfuric acid, resulting in acid pollution

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