System for producing anhydrous calcium chloride by using industrial waste hydrochloric acid, and technology thereof

Abstract

The invention discloses a system for producing anhydrous calcium chloride by using industrial waste hydrochloric acid, and a technology thereof. The reaction system of the technology is connected to an evaporation system through a refined calcium chloride conveying device, and the evaporation system, a calcium chloride forming machine, a drying system, a finished calcium chloride conveying device and a finished calcium chloride bunker are sequentially connected; the reaction system is mutually connected with a reaction tail gas treatment system; and the refined calcium chloride conveying device is also connected with a dry tail gas washing device, and the gas outlet end of the drying system is connected to the inlet end of the evaporation system through the dry tail gas washing device. The reaction tail gas washing device adopts a clean calcium chloride solution as an absorbent, and the hydrogen chloride absorbed calcium chloride solution returns to a calcium chloride reactor, so the concentration of hydrochloric acid is not diluted, and the energy consumption of the evaporation system is reduced; and the calcium chloride solution is used to wash dust-containing tail gas with calories to make dusts not exist in vented tail gas, and a circulating absorption solution absorbing the calories in the tail gas returns to the evaporation system and is reused, so the energy consumption of the evaporation system is reduced.

Description

technical field [0001] The invention relates to a system and process for producing anhydrous calcium chloride, in particular to a system and process for producing anhydrous calcium chloride by using industrial waste hydrochloric acid, and belongs to the technical field of chemical industry. Background technique [0002] In the existing calcium chloride production system and method, the reaction vessel occupies a large area, the production scale is small, and it is difficult to realize large-scale continuous production; improper treatment of reaction tail gas results in increased system energy consumption and environmental pollution. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the present invention provides a system and process for producing anhydrous calcium chloride by using industrial waste hydrochloric acid. The system and method can not only realize the treatment of industrial by-product hydrochloric acid, but also produce anhydrous ...

AI Technical Summary

Problems solved by technology

[0002] In the existing calcium chloride production system and method, the reaction vessel occupies a large area, the production scale is small, and it is difficult to realize large-scale continuous production; the reaction tail gas is not properly treated, resulting in increased energy consumption of the system and environmental pollution

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