Automobile factory water curtain spraying room circulating wastewater treatment and recycling system and recycling method

Abstract

The invention relates to the technical field of wastewater treatment, in particular to a water curtain spraying room circulating wastewater treatment and recycling system and method in the automobile paint spraying treatment process. The optimized advanced treatment recycling system and recycling method are provided for water curtain spraying room circulating discharge waste water in the automobile paint spraying treatment process of an automobile manufacturing plant, toxic and harmful substances and organic pollutants in the waste water are greatly reduced through coagulating sedimentation treatment, and the waste water is recycled. In the subsequent treatment process, evaporation concentration treatment and three-stage advanced oxidation device treatment are adopted, refractory organics in the water body can be removed to a great extent, and the water body is recycled after passing through an ultrafiltration device, a reverse osmosis device, a sterilization device and a constant-pressure water supply device. The treated reuse water can be used for recycling of a water curtain spraying room paint mist capturing system, the water consumption is greatly reduced, and the discharge amount of industrial wastewater is reduced to the maximum extent.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a recycling system and a recycling method for circulating wastewater in a water curtain spray booth of an automobile factory. Background technique [0002] During the process of spraying paint on the surface of automobile products, the paint shop of the automobile factory uses circulating water curtain water to absorb 40% to 60% of the paint mist sprayed into the air. Due to the use of water-based and solvent-based paints, a large amount of organic substances (including resins, vegetable oils, mineral oils, saponins, esters, toluene, xylene, organic acids, etc.) and a small amount of inorganic acids, alkalis, and salts are suspended and dissolved in the circulating water etc., leading to the continuous increase of its CODCr, and after a certain period of time, the water in the circulating tank will start to stink, which will pollute the air in the sewage treatment op...

AI Technical Summary

Problems solved by technology

Due to the use of water-based and solvent-based paints, a large amount of organic substances (including resins, vegetable oils, mineral oils, saponins, esters, toluene, xylene, organic acids, etc.) and a small amount of inorganic acids, alkalis, and salts are suspended and dissolved in the circulating water etc., leading to the continuous increase of its CODCr, and after a certain period of time, the water in the circulating tank will start to stink, which will pollute the air in the sewage treatment operation site, and will also affect the health of the operator, so it must be treated in time

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