Acid water recovery treatment equipment and process thereof

Abstract

Acid water recovery treatment equipment and a process thereof relate to the technical field of wastewater treatment. The equipment comprises a pressure container tank, a vacuum pressure pump and a heating system, wherein the pressure container tank is provided with an acid aqueous solution inlet, a pressure pump interface and a finished acid outlet; the vacuum pressure pump is connected with the pressure pump interface through a steam pipe and used for forming a negative pressure environment in the pressure container tank and guiding water vapor out of the pressure container tank; and the heating system is connected with the pressure container tank and used for heating an acid aqueous solution to be treated to convert water in the acid aqueous solution into water vapor. The vacuum pressurepump forms a negative pressure environment close to vacuum in the pressure container tank, so that the gasification point of water in the acid aqueous solution to be treated is reduced, the energy consumption of the heating system is greatly reduced, and the production cost is reduced; moreover, the finished acid is separated in a medium-low temperature environment and cannot be damaged by high temperature, and the quality is higher; besides, the temperature of the working environment is reduced, so that the service life of each part is greatly prolonged, the maintenance cost is reduced, andthe production efficiency is also improved.

Description

technical field [0001] The present application relates to the technical field of wastewater treatment, in particular to an acid water recovery treatment equipment and process. Background technique [0002] At present, most of the surface treatment processes for metal aluminum materials are based on chemical oxidation and chemical polishing processes, and a large amount of phosphoric acid and sulfuric acid or mixed acids are required in the process of chemical oxidation and chemical polishing of aluminum materials. , so that in the subsequent washing process of aluminum, a large amount of acid will be brought out, and a large amount of acid-water mixture will be formed. The treatment of these acid-water mixture generally requires a large amount of neutralizer for special neutralization treatment. Treating it with a special process will cause great pollution to the environment and waste resources, which will greatly increase the overall cost. Therefore, a device that can recyc...

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Problems solved by technology

[0002] At present, most of the surface treatment processes for metal aluminum materials are based on chemical oxidation and chemical polishing processes, and a large amount of phosphoric acid and sulfuric acid or mixed acids are required in the process of chemical oxidation and chemical polishing of aluminum materials. , so that in the subsequent washing process of aluminum, a large amount of acid will be brought out, and a large amount of acid-water mixture will be formed. The treatment of these acid-water mixture generally requires a large amount of neutralizer for special neutralization treatment. Treating it with a special process will cause great pollution to the environment and waste resources, which will greatly increase the overall cost. Therefore, a device that can recycle acid water is needed to solve this problem, that is, to reduce the consumption of neutralizers. Reduce the pollution of sediments and recycle the acid for secondary use

[0003] The acid water recovery and treatment equipment in the prior art all adopt heating, burning, and cooking methods, so that the water in the acid water mixture evaporates at high temperature to form the separation of acid and water. This method needs to convert a large amount of electric energy into heat energy. Conducive to energy saving, low efficiency, and the temperature of the separated finished acid is very high, high temperature will have a negative impact on the quality of the acid, and the equipment works in a high temperature environment, which has a great impact on the service life of the equipment, some Valves, sensors and other accessories need to be replaced frequently, which increases maintenance costs and inefficiencies

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