Paint spraying wastewater treatment device

Abstract

The invention discloses a paint spraying wastewater treatment device. The paint spraying wastewater treatment device includes an automatic control system, a water pump system, a dosing device, a pretreatment tank, an oxidation device, a reaction tank, a coagulation and flocculation tank, a sedimentation tank and a filter pressing device, wherein the pretreatment tank, the oxidation device, the reaction tank, the coagulation and flocculation tank, the sedimentation tank and the filter pressing device are sequentially connected, the pretreatment tank, the oxidation device, the reaction tank, the coagulation and flocculation tank, the sedimentation tank, the filter pressing device and the water pump system are electrically connected with the automatic control system, PH meters capable of detecting PH values are arranged in both the pretreatment tank and the reaction tank, an ultraviolet lamp and a stirring device capable of performing mechanical stirring are arranged in the oxidation device, the pretreatment tank, the oxidation device, the reaction tank and the coagulation and flocculation tank are connected with the dosing device capable of adding chemicals, and a mud pressing machine is arranged at the bottom of the filter pressing device. The paint spraying wastewater treatment device adopts the ultraviolet lamp and a Fenton oxidation technology combined treatment method and is matched with the corresponding oxidation device to conduct automatic oxygenolysis treatment on paint spraying wastewater, so that the removal rate of COD in the paint spraying wastewater can be 80% or above.

Description

technical field [0001] The invention relates to the technical field of spray paint wastewater treatment, in particular to a paint spray wastewater treatment device. Background technique [0002] Existing painting wastewater is wastewater produced in the process of painting treatment in the manufacturing industry. It is mainly produced in the spray booth water curtain cabinet and the spray tower in the waste gas treatment. The main pollutants are as follows: 1. Film-forming substances: mainly It is synthetic resin, alkyd resin, acrylic resin, chlorinated rubber resin, epoxy resin, etc. 2. Pigment: mainly divided into inorganic pigment and organic pigment, 3. Thinner: mainly benzene, toluene, xylene, ethyl acetate , butyl acetate, acetone, etc. 4. Auxiliaries: mainly defoamers, wetting agents, drier, plasticizers, curing agents, etc. Once the spray paint wastewater is directly discharged into the environment, it will It stays in the medium for a long time and is difficult to ...

AI Technical Summary

Problems solved by technology

[0002] Existing painting wastewater is wastewater produced in the process of painting treatment in the manufacturing industry. It is mainly produced in the spray booth water curtain cabinet and the spray tower in the waste gas treatment. The main pollutants are as follows: 1. Film-forming substances: mainly It is synthetic resin, alkyd resin, acrylic resin, chlorinated rubber resin, epoxy resin, etc. 2. Pigment: mainly divided into inorganic pigment and organic pigment, 3. Thinner: mainly benzene, toluene, xylene, ethyl acetate , butyl acetate, acetone, etc. 4. Auxiliaries: mainly defoamers, wetting agents, drier, plasticizers, curing agents, etc. Once the spray paint wastewater is directly discharged into the environment, it will It stays in the medium for a long time and is difficult to be decomposed. In addition, the refractory organic matter in wastewater has the characteristics of low water solubility and high fat solubility, and can bioaccumulate in most biological fats, and some refractory organic matter is semi-volatile. , can migrate long distances in the atmospheric environment. They generally have toxic effects on humans and animals, and some can cause endocrine disorders, reproductive and immune dysfunction, and some even cause serious diseases. Therefore, wastewater must be treated and discharged up to standard. Existing coagulation and sedimentation, air flotation and various specific agents cannot effectively treat spray painting wastewater, and the treatment efficiency only reaches 50%, which cannot meet the third-level sewage discharge standard

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