Primary treatment tank for machining waste water

Abstract

Disclosed is a primary treatment tank for machining waste water. The tank comprises a tank body, the bottom of the tank body is provided with a water outlet pipe and an oil outlet pipe, the interior of the tank body is divided into an intermediate water collecting area and an external oil collecting area through a water collecting hopper, the water outlet pipe extends into the tank body and is connected with the bottom of the water collecting hopper, the oil outlet pipe is directly communicated with the bottom of the tank body, the interior of the tank body is located above the water collecting hopper and provided with a split type filter barrel, the middle of the filter barrel is provided with a guide column, and the interior of the filter barrel is sequentially provided with an oil blocking layer, a metal collecting layer and a suspended matter filtering layer through the guide column. According to the primary treatment tank for the machining waste water, the defects of the prior art are overcome, firstly, the interior of the tank body is divided into the intermediate water collecting area and the external oil collecting area through the water collecting hopper, then the split type filter barrel is arranged above the water collecting hopper, the interior of the split type filter barrel is sequentially provided with the suspended matter filtering layer, the metal collecting layer and the oil blocking layer from top to bottom, suspended matter, metal foreign matter, floating oil and water are separated in sequence, so that post-treatment is carried out conveniently, the post-treatment efficiency is effectively improved, and the subsequent treatment difficulty is reduced at the same time.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment equipment, in particular to a primary treatment tank for mechanical processing wastewater. Background technique [0002] During the machining process, waste water such as cooling liquid, organic cleaning liquid, spray paint waste water, and EDM working liquid is discharged. Although the amount of these wastewaters is small, the concentration of organic matter is very high, and the CODCr of the cooling liquid is as high as 50,000-300,000 mg / L. If it is not treated and discharged directly, it will cause serious pollution to the environment. There is a bottleneck in the treatment of high-concentration mechanical processing wastewater in China. Many combined treatment processes can successfully reduce its CODCr to thousands of mg / L, but it is very difficult to further improve the treatment efficiency. In my country, the high-concentration and emulsified oily wastewater discharged from me...

AI Technical Summary

Problems solved by technology

Although the amount of waste water is small, the concentration of organic matter is high, and the CODCr of the cooling liquid is as high as 50,000-300,000 mg / L. If it is not treated and discharged directly, it will cause serious pollution to the environment.

There is a bottleneck in the treatment of high-concentration mechanical processing wastewater in China. Many combined treatment processes can successfully reduce its CODCr to thousands of mg / L, but it is very difficult to further improve the treatment efficiency.

In my country, the high-concentration and emulsified oily wastewater discharged from mechanical processing has not been well treated.

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