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Technical method for CPE wastewater treatment

A process method and technology for wastewater treatment, applied in the field of wastewater treatment, can solve the problems of unstable process and high treatment cost, and achieve the effects of low treatment cost, low treatment cost and the need for saving additional acid

Inactive Publication Date: 2016-09-21
WUHAN INSTITUTE OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] There are some studies on the use of calcium carbide slurry wastewater to treat CPE wastewater, but the process is unstable and requires a large amount of flocculant, acid, alkali or NaClO, O 3 and other oxidants, leading to high processing costs

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  • Technical method for CPE wastewater treatment
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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] refer to figure 1 Shown, the processing method of the CPE wastewater treatment in an embodiment provided by the invention comprises the following steps:

[0029] 1) The CPE wastewater is divided into two parts, one part is passed into the second reaction tank 4, and the other part is passed into the neutralization tank 7;

[0030] 2) Feed calcium carbide slag slurry wastewater into the second reaction tank 4 for acid-base neutralization;

[0031] 3) Pass the neutralized wastewater in the second reaction tank 4 into the second sedimentation tank 5 for precipitation and filtration;

[0032] 4) Pass the treated wastewater into the neutralization tank 7, and neutralize it with another part of untreated CPE wastewater.

[0033] Through the neutralization reaction between calcium carbide slurry wastewater and CPE wastewater, it is possible to trea...

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Abstract

The invention discloses a technical method for CPE wastewater treatment. The technical method includes steps: dividing CPE wastewater into two parts, and feeding the two parts into a second reaction tank and a neutralizing tank respectively; feeding acetylene sludge wastewater into the second reaction tank to realize acid-base neutralization; feeding wastewater neutralized in the second reaction tank into a second sedimentation tank to realize sedimentation and filtering; feeding treated wastewater into the neutralizing tank to be neutralized with the untreated CPE wastewater. The technical method for CPE wastewater treatment has advantages of reduction of consumption of additional acids, alkalis and other agents in a wastewater treatment process, structural simplicity, low treatment cost, energy saving, environment friendliness and high practicality.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a process for treating CPE wastewater. Background technique [0002] CPE wastewater has high chloride ion content and a low pH value below 0; the pollutants are mainly caused by the use of chlorine gas in the production process to form HCl in water, and some solid impurities such as PE are entrained. The wastewater is characterized by low pH, low B / C ratio, and extremely poor biochemical properties, which cannot be treated by biochemical methods; while using chemical methods, the amount of alkali used for acid-base neutralization is very large, resulting in high treatment costs. It exceeds the budget of many chemical plants of this type for sewage treatment. Therefore, in order to reduce the cost of CPE wastewater treatment, reducing the cost of alkali is the key. The front section of the chemical plant that produces CPE often uses calcium carbide to produce acetylene ...

Claims

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Application Information

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IPC IPC(8): C02F9/04
CPCC02F9/00C02F1/001C02F1/66C02F2001/007C02F2301/08
Inventor 陈金毅李晶何欣
Owner WUHAN INSTITUTE OF TECHNOLOGY