Process method for dimethyl ether production wastewater recycled for cooling water

Abstract

The invention relates to a processing method for recovering the organic waste water exhausted from the dimethyl enther procedure to be used for industry circulation cooling water, and adopts the integrated system technique of anoxic activated sludge pool-anoxic biological contact oxidation pond-oxygen biological contact oxidation pond-coagulation sedimentation tank-oxygenrich biological activated carbon filtrating pool-UV bactericidin disposal technique. The biological contact oxidation pond adopts a biological filling and micropore aerating system. The anoxic biological contact oxidation degrades the organic matter under the condition of DO is 0.5 to 1.0 mg / L, and the oxygen biological contact oxidation effectively eliminates CODcr under the condition of the DO is 2 to 4mg / L. The outputted water from the oxygen biological contact oxidation pond is used for eliminating the suspended matter by coagulating and precipitation, and further is deeply processed through oxygenrich biological activated carbon filtrating pool to eliminate suspended matter and organic matter, and is finally sterilized through uv to be repeatedly used as circulation cooling water makeup water. Compared with the normal anaerobic technique, the anoxic biological processing technique eliminates the producing of the peculiar smell of H2S, and compared with the aerobic technique, the aeration quantity is reduced, the powder consumption is saved, and the anoxic biological processing technique is a new technique of biological processing. The method has the advantages of simple operation, low running expenses, small device investment and zero exhausting of waste water, and without secondary pollution.

Description

technical field [0001] The invention relates to the treatment and reuse of dimethyl ether production industrial wastewater, in particular to a treatment method for recycling organic waste water discharged in the dimethyl ether production process to industrial circulating cooling water. Background technique [0002] In the production process of the chemical product dimethyl ether, the distillation raffinate discharged from the bottom of the rectification tower has a strong pungent smell, and its main components are methanol and phosphate. At present, the common treatment methods for the wastewater discharged from the production of dimethyl ether include physical and chemical methods, chemical methods and biochemical methods, and these methods can treat the wastewater discharged from the production of dimethyl ether to different degrees. Physicochemical and chemical methods are incomplete treatment methods. Biological treatment methods are effective, including anaerobic biolo...

AI Technical Summary

Problems solved by technology

The disadvantage of the aerobic biological fluidized bed treatment process is that the power consumption is large and the content of organisms in the effluent is high.

[0007] Literature search at home and abroad shows that at present, there is no report on the treatment method of reusing the production wastewater of dimethyl ether for industrial circulating cooling water.

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