A kind of waste water treatment process of spray paint room

Abstract

The invention discloses a process for treating waste water in a paint spraying room, which is characterized in that the waste water in the spray paint room is filtered by a filter and then pumped into the waste water treatment device in the spray paint room, and then a catalyst and H are added to the waste water treatment device in the paint spray room 2 o 2 And fully stir the reaction for 0.5 hours to 1 hour, discharge all the reacted liquid into the metal ion recovery device containing slaked lime water, and discharge it after static precipitation in the metal ion recovery device for 2 hours to 3 hours, after the above process Complete the treatment of wastewater from the spray booth, and at the same time regenerate the solid deposits in the metal ion recovery device after the liquid is discharged. The invention adopts the homogeneous catalytic wet hydrogen peroxide oxidation method to treat the wastewater in the paint spraying room, which has the characteristics of fast reaction rate and thorough degradation. At the same time, the subsequent treatment and regeneration of metal ions are considered. The process flow is simple, energy consumption and equipment investment are low. Technical and economic advantages are obvious.

Description

technical field [0001] This patent relates to the field of waste water treatment, in particular to a process for treating waste water in spray booths. Background technique [0002] The painting operation has the functions of anticorrosion and decoration, but paint mist will be generated during the painting process. The benzene series in the paint mist, such as benzene, toluene, xylene, etc., will cause harm to the blood, nerves, and reproductive system of the human body, and direct discharge will cause severe air pollution. At present, the most widely used treatment method for paint mist is to use a wet-type water curtain adsorption device for adsorption, so that most of it is dissolved in water, thereby forming high-concentration spray paint wastewater. The wastewater reaches saturation after a period of recycling and must be replaced. fresh body of water. At present, most spray booths generally discharge this kind of wastewater directly. On the surface, the paint mist is...

AI Technical Summary

Problems solved by technology

However, the water body generally has the characteristics of small amount, dispersion, high toxicity, and difficult biodegradation. The conventional biological treatment method is generally aimed at the waste water with large amount, stable source of waste water and easy biodegradation. There are great difficulties, and physical methods such as slag removal, flocculation and other treatment methods have shortcomings such as incomplete treatment. Therefore, the present invention aims to carry out efficient catalytic oxidation degradation to it by adopting a homogeneous catalytic wet hydrogen peroxide oxidation method to make it Mineralize into water and carbon dioxide to achieve harmless discharge, thus solving the discharge problem of wastewater generated by wet water curtain adsorption in spray booths

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