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Treatment system and method for wastewater generated by cleaning flue gas of waste incineration

A wastewater treatment system and flue gas cleaning technology, applied in gaseous discharge wastewater treatment, multi-stage water treatment, water/sewage treatment, etc., can solve the problems of non-biodegradability, pollutant degradation and decolorization, and technical difficulties And other issues

Pending Publication Date: 2017-11-03
GUANGZHOU S SUNNY ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high content of salt, especially heavy metals, and high concentrations of oxychloride or free chlorine, waste incineration flue gas cleaning wastewater is basically not biodegradable, and it is difficult to degrade and decolorize pollutants through biochemical methods. Other pollutants The methods of degradation and decolorization also have disadvantages such as high cost and high technical difficulty.
At present, the pollutant degradation and decolorization of waste incineration flue gas cleaning wastewater is an international problem

Method used

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  • Treatment system and method for wastewater generated by cleaning flue gas of waste incineration
  • Treatment system and method for wastewater generated by cleaning flue gas of waste incineration
  • Treatment system and method for wastewater generated by cleaning flue gas of waste incineration

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Embodiment 1

[0045] In this embodiment the effective volume of the pool is 2m 3 , collect enough 1.5m in the collection pool 3 After the wastewater, analyze the pH value and COD of the wastewater Cr and chroma etc.

[0046] (1) Iron carbon treatment

[0047] After collecting enough wastewater in the collection tank, discharge the wastewater into the first pH adjustment tank, turn on the aeration device, add sulfuric acid to the first pH adjustment tank to adjust the pH value of the wastewater to between 3 and 4, after the pH value adjustment is completed, put The waste water is discharged into the iron-carbon treatment device, and the time for the waste water to stay in the iron-carbon treatment device is 4 hours.

[0048] After the residence time of the wastewater in the iron-carbon treatment device is over, the wastewater is discharged to the aeration tank for aeration for 5 hours.

[0049] After the aeration is finished, the waste water is discharged into the electroflocculation dev...

Embodiment 2

[0070] In this embodiment the effective volume of the collection pond is 4m 3 , enough to collect 3.5m in the collection pool 3 After the wastewater, analyze the pH value and COD of the wastewater Cr and chroma etc.

[0071] (1) Iron carbon treatment

[0072] After enough wastewater is collected in the collection tank, it is discharged into the first pH adjustment tank, the aeration device is turned on, and sulfuric acid is added to the first pH adjustment tank to adjust the pH of the wastewater to between 3 and 4.

[0073] After the pH adjustment is completed, the wastewater is discharged into the iron-carbon treatment device. The residence time of wastewater in the iron-carbon treatment device is 6 hours.

[0074] After the residence time of the wastewater in the iron-carbon treatment device is over, the wastewater is discharged into the aeration tank, and the aeration device is turned on for aeration for 3 hours.

[0075] After the aeration time is over, the wastewater...

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Abstract

The invention discloses a treatment system and method for wastewater generated by cleaning flue gas of waste incineration. The treatment system comprises a collection tank, a first pH regulating tank, an iron-carbon treatment device, an aeration tank, an electro-coagulation device, a second pH regulating tank, a first sedimentation tank, an ozone treatment device, a chemical adding tank and a second sedimentation tank which are communicated in sequence. By using the treatment system and method for the wastewater generated by cleaning the flue gas of waste incineration disclosed by the invention, the wastewater generated by cleaning the flue gas of waste incineration can be treated, the COD value of the wastewater finally discharged from the second sedimentation tank is decreased to a great extent and the chromaticity is effectively reduced, free chlorine in the wastewater basically disappears, and is transformed into inorganic chloride ions without biological toxicity, and the finally resulting wastewater has good biodegradability. After the treatment system and method are used for treating the wastewater generated by cleaning the flue gas of waste incineration, no toxic and harmful gas is generated, the emission of pollutants is reduced, and the difficulty and cost of wastewater treatment are reduced.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a waste incineration flue gas cleaning waste water treatment system and method. Background technique [0002] Waste incineration refers to the process of burning waste at high temperature in an incinerator, and different substances in the waste generate gas and solid residues during this process. The temperature directly affects the effect of waste incineration. Although higher temperature is conducive to the full combustion of organic matter, but too high temperature will also produce toxic nitrogen oxides. Therefore, the temperature for industrial waste incineration is usually limited to between 800 and 1000°C. The organic substances in garbage will produce carcinogens such as dioxin due to incomplete combustion in the case of insufficient oxygen. Although increasing the amount of air can improve the combustion efficiency of organic matter and reduce the production of thes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F103/18
CPCC02F9/00C02F2103/18C02F2001/007C02F7/00C02F1/78C02F1/66C02F1/56C02F1/4676C02F1/463C02F2301/08
Inventor 李小琴康佑军
Owner GUANGZHOU S SUNNY ENVIRONMENTAL PROTECTION TECH CO LTD
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