Method for reducing COD content in discharged wastewater of cyclohexanone device

A cyclohexanone, a technology outside the device, applied in the field of cyclohexanone production, can solve the problems of incomplete separation of condensate, large amount of waste water discharged, and high COD content, so as to reduce the discharge of gas phase, save consumption, and reduce organic matter. The effect of content

Active Publication Date: 2020-04-17
CHINA PETROLEUM & CHEM CORP +1
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AI-Extracted Technical Summary

Problems solved by technology

[0010]Aiming at the cyclohexanone/cyclohexanol vacuum condensate recovery process in the prior art, there are incomplete separation of condensate, large amount of discharged wastewater, and Defects such ...
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Method used

Adopt traditional process to process, the organic phase of condensate recovery tank carries out ejection by process water, reclaims with vacuum pump, then by pumping to saponification system, this method of operation increases the labor intensity of operator, reclaims with vacuum pump When the materials are collected, some organic materials run into the atmosphere through the gas phase pipeline, polluting the environment. The water phase is...
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Abstract

The invention discloses a method for reducing COD content in discharged wastewater of a cyclohexanone device, wherein on the premise of ensuring a water seal function of a condensate recovery tank, the condensate in the condensate recovery tank is continuously or discontinuously pumped into a decomposition reaction kettle by arranging a booster pump. According to the invention, a condensate recovery tank and decomposition reaction kettle series production process is designed, the condensate in a condensate recovery tank is continuously or discontinuously pumped into a decomposition reaction kettle by arranging a booster pump, the condensate as the supplemented water of the decomposition reaction kettle can replace process water to supplement the decomposition reaction kettle while the condensate is extracted and separated through a large amount of cyclohexane in the decomposition liquid, so that the content of the organic matter in the condensate is reduced.

Application Domain

Water treatment parameter controlMultistage water/sewage treatment +2

Technology Topic

CyclohexanesDecomposition +5

Image

  • Method for reducing COD content in discharged wastewater of cyclohexanone device

Examples

  • Experimental program(1)
  • Comparison scheme(1)

Example Embodiment

[0027] Example 1
[0028] A cyclohexanone plant with an annual output of 80,000 tons, the ventilation volume is about 13200Nm 3 /h, the vacuum condensate of the cyclohexanone tower/cyclohexanol tower is about 2t/h, and the organic matter content is 5.67%. The vacuum condensate of the cyclohexanone tower/cyclohexanol tower is treated by the technical scheme of the present invention, and the COD content in the waste water discharged from the stripping process is 2159 mg/L.

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