Method for treating phenol-containing wastewater in gas generator

Abstract

The invention discloses a method for treating phenol-containing wastewater in a gas generator and relates to the technical field of wastewater treatment. The treatment method comprises the following steps: slowly dropwise adding 98 percent concentrated sulfuric acid into wastewater, and regulating the pH value of the wastewater; filtering the acidified wastewater, pumping the wastewater into a liquid collector, and removing suspended solids and tar; metering the wastewater liquor and a QH-1 complexing extraction agent, and pumping the liquor and extraction agent into extraction equipment for performing multistage countercurrent extraction phenol removal; performing five-level countercurrent extraction on the wastewater liquor, allowing the wastewater subjected to phenol removal to enter a production process for recycling or to enter the next-level biochemical treatment process; and performing three-level countercurrent reverse extraction on a load extraction agent subjected to the five-level countercurrent extraction, recycling a solvent subjected to reverse extraction in a solvent tank, and collecting and storing the sodium phenolate liquid removed by reverse extraction. A phenomenon that the product yield is influenced due to abnormal production of a cracking furnace caused by instable air supply as well as brought safety and environmental protection risks can be eliminated. Meanwhile, industrial effluent is greatly reduced, and the economic benefits are good.

Description

Technical field: [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for treating phenol-containing wastewater of a gas generator. Background technique: [0002] The status quo of phenol water treatment in gas generator For decades, how to thoroughly treat phenol-containing sewage has been an environmental problem that plagues gas stations. After long-term research and discussion, experts engaged in industrial gas design and research have found some effective treatments. method has achieved certain results, but there are still many shortcomings. [0003] 1. At present, there are several conventional treatment methods for phenolic sewage in gas stations. The treatment of phenolic sewage in gas stations is generally divided into two stages: [0004] The first stage: pretreatment stage This stage aims to remove most of the suspended solids and tar in the sewage; [0005] The second stage: the dephenolization treatment stage a...

AI Technical Summary

Problems solved by technology

Another key disadvantage of using the incineration method to treat phenolic sewage is that once the operation is careless, the furnace temperature will drop, which will often cause incomplete combustion and easily cause secondary pollution.

[0028] 1. Except for the steam dephenolization method and incineration method, the other treatment methods have strict requirements on sewage pretreatment, and their own processes are relatively complicated, and the one-time investment is large, which is difficult for some small and medium-sized gas stations.

[0029] 2. Affected by its own dephenolization process and the efficiency requirements of dephenolization, the operating costs of conventional methods for treating phenolic sewage are relatively high

[0031] 4. The efficiency of dephenolization is not high, the treatment is not thorough, and it is easy to form secondary pollution. This is another key point that restricts the popularization and application of certain dephenolization methods