Sedimentation tank for paint spraying wastewater treatment

Abstract

The invention discloses a sedimentation tank for paint spraying wastewater treatment. The sedimentation tank comprises a first stage treatment tank, a second stage treatment tank and a third stage treatment tank, wherein the first stage treatment tank is used for receiving paint spraying wastewater flowing from an external paint spraying process; wastewater discharged from the third stage treatment tank flows to an external follow-up wastewater treatment process; the first stage treatment tank, the second stage treatment tank and the third stage treatment tank are sequentially arranged in the wastewater treatment direction; a water inlet passage and a water outlet passage are arranged on the side wall of each treatment tank; the bottoms of the water inlet passages of the treatment tanks are higher than those of the water outlet passages of the treatment tanks; the water inlet passage of the latter stage treatment tank is positioned below the water outlet passage of the former stage treatment tank to form a step; the cross section area of the water inlet passage of the latter stage treatment tank is larger than the cross section area of the water outlet passage of the former stage treatment tank; the water inlet passage of the latter stage treatment tank is used for collecting wastewater discharged from the water outlet passage of the former stage treatment tank. According to the sedimentation tank, solid-state waste residue blocks can be separated from paint spraying wastewater in lower cost, the purpose of primary wastewater treatment is achieved, the equipment is simple, and the popularization and the application are facilitated.

Description

technical field [0001] The invention belongs to the field of industrial waste water treatment, and in particular relates to a sedimentation tank used for the treatment of spray paint waste water. Background technique [0002] The current painting process will produce a large amount of paint mist, which will have a bad impact on the environment. Therefore, the paint mist must be treated in the painting process. The commonly used treatment methods are dry and wet. The wet treatment of paint mist is to capture the paint with water. Fog, and add chemicals to the water to make the paint mist condense into slag. Due to the complex painting process, the wastewater generated is complex. Sometimes it is necessary to use multiple processes to treat the wastewater. It is the first process of wastewater treatment. When the composition of wastewater is complex, the specific gravity of the waste residue block may be larger than water or smaller than water, that is, the floating state in w...

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Problems solved by technology

[0002] The current painting process will produce a large amount of paint mist, which will have a bad impact on the environment. Therefore, the paint mist must be treated in the painting process. The commonly used treatment methods are dry and wet. The wet treatment of paint mist is to capture the paint with water. Fog, and add chemicals to the water to make the paint mist condense into slag. Due to the complex painting process, the wastewater generated is complex. Sometimes it is necessary to use multiple processes to treat the wastewater. It is the first process of wastewater treatment. When the composition of wastewater is complex, the specific gravity of the waste residue block may be larger than water or smaller than water, that is, the floating state in water is uncertain, and in industrial production, the pure filtration method is not suitable for containing a large amount of The treatment of solid waste water, so how to separate solid waste residue from spray paint waste water at a lower cost is a research direction

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