Device for preparing refined sulfuric acid as a whole by water balance method and method for preparing refined sulfuric acid

Abstract

The invention discloses a device for integrally preparing refined sulfuric acid by a water balance method and a method for preparing the refined sulfuric acid. The device for integrally preparing refined sulfuric acid by the water balance method and the method for preparing the refined sulfuric acid belong to the technical field of refined sulfuric acid preparation. The device comprises a primarypurification system, a first washing tower, a second washing tower, a first precision filter, a second precision filter, a drying tower, a flue gas filter, a conversion system, an absorption tower, alower tower mixing tank, a dry absorption circulating tank, a drying acid cooler, an absorption acid cooler and a refined sulfuric acid storage system. According to the invention, the refined sulfuricacid can be integrally produced from SO2 flue gas, and an SO2 flue gas acid producing method which can be used to produce only a small amount of refined sulfuric acid is replaced. In addition, raw materials of the refined sulfuric acid prepared by the method provided by the invention all come from pure water and pure SO3 contained in the SO2 flue gas, and the concentration of the refined sulfuricacid product is adjusted by supplementing pure water, so that the water balance of the whole system is achieved. The device and method provided by the invention can improve the economic benefits of enterprises.

Description

technical field [0001] The invention belongs to the field of refined sulfuric acid preparation, and in particular relates to a device for integrally preparing refined sulfuric acid by a water balance method and a method for preparing refined sulfuric acid. Background technique [0002] In the existing field of acid production, most of the sulfuric acid products produced by flue gas acid production equipment are industrial sulfuric acid, with only a small amount of refined sulfuric acid. However, industrial-grade sulfuric acid contains impurities, and its purity is uncertain. There are heavy metals, ash, chlorine, sulfur dioxide, etc. Industrial sulfuric acid is mostly used in petroleum refining, non-ferrous metal smelting, steel pickling, tanning process, coking industry, light textile industry and other fields. High fields, such as battery raw materials, medicine and other fields, as well as reagent sulfuric acid specially used for chemical experiments and chemical analysis...

AI Technical Summary

Problems solved by technology

However, the traditional flue gas acid plant does not yet have the ability to prepare refined sulfuric acid as a whole. Most of the refined sulfuric acid preparation in the prior art has complex devices, cumbersome processes, low production efficiency, low annual output, and only a small amount of refined sulfuric acid can be produced. Sulfuric acid, the quality of the finished product is difficult to control and many other problems, so the inventor is to develop a device for the overall production of refined sulfuric acid by water balance method and a method for preparing refined sulfuric acid

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