Acid mist condensing water-saving method of reaction kettle for producing aluminum polychlorid and system thereof

Abstract

The invention discloses an acid mist condensing water-saving method of a reaction kettle for producing aluminum polychlorid and a system of the acid mist condensing water-saving method. The acid mist of the reaction kettle for producing the aluminum polychlorid is recycled after being condensed by a condenser, the condenser is cooled by using circulating water, wherein the cooling water temperature is 5-40 DEG C; the circular cooling water is conveyed to the reaction kettle for producing the aluminum polychlorid so as to produce water; liquid after being condensed by the acid mist is delivered into the reaction kettle for producing the aluminum polychlorid to replace the hydrochloric acid; the system is provided with the condenser, a condensing liquid collecting tank, a circulating water tank and a circular water pump; a gas outlet of the condenser is connected with the reaction kettle through a pipeline, a non-condensable gas outlet of the condenser is connected with the acid mist absorbing tower through the pipeline; a condensate outlet is connected with a condensate collecting tank through the pipeline; and the cooling water pipe is orderly connected with the circulating water tank, the circular water pump and the condenser.

Description

technical field [0001] The invention relates to the technical field of water saving, in particular to an acid mist condensing water saving method and a system thereof in a reactor for producing polyaluminum chloride. Background technique [0002] The existing production process of polyaluminium chloride often adopts the acid-dissolving method, adding hydrochloric acid, aluminum-containing materials, regulators, water and other chemical reactants into the reactor during production, and reacting at a temperature of 95-100°C. During the reaction process, the hydrochloric acid is volatilized by heating to form acid mist. The acid mist is composed of HCL gas and water vapor. The acid mist needs to be recovered and purified during the production process to reduce environmental pollution. The current treatment method is to absorb the tail gas with alkali solution after the acid mist condenser. A condenser is often used in the acid mist condensation process, with water as the cooli...

AI Technical Summary

Problems solved by technology

A condenser is often used in the acid mist condensation process, with water as the cooling medium, and the recycling rate of water is not high. In addition, the condensate in the condenser is often discharged intermittently, and the condensate accumulates in the condenser periodically, reducing the The heat exchange efficiency of the condenser increases water consumption; or it is easy to be taken to the subsequent alkali absorption device to increase alkali consumption

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