Method and device for treating circulating spray liquid discharged from printing and dyeing wastewater deodorization system

A technology for circulating spraying and printing and dyeing wastewater, applied in textile industry wastewater treatment, multi-stage water treatment, water/sewage treatment, etc., can solve problems such as anaerobic and aerobic system death, sewage treatment system impact, etc., to reduce pollution content, reduce hazards, and maintain normal operation

Active Publication Date: 2018-06-19
南京飞锦环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In general sewage treatment, in order to solve the problem of odor, the lye spray absorption tower is used, and the circulating spray liquid discharged from it (the treated wastewater continues to flow back to the previous treatment structure) contains a large amount of sulfide, which will bring pollution to the sewage treatment system. A major impact caused the death of biological bacteria in the anaerobic and aerobic systems of the sewage treatment system; Enter the sewage treatment station after a certain range

Method used

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  • Method and device for treating circulating spray liquid discharged from printing and dyeing wastewater deodorization system
  • Method and device for treating circulating spray liquid discharged from printing and dyeing wastewater deodorization system

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Embodiment 1

[0030] The above-mentioned device is used in the upgrading and upgrading of a textile printing and dyeing sewage treatment plant for the technical research of sewage treatment. The influent water quality of the printing and dyeing wastewater treatment plant is: COD cr 6000-8000mg / L, sulfide 1200-2200mg / L, pH 8.5-10.0. The hydraulic retention time of the control adjustment tank is 20h; the residence time of the three-stage catalytic oxidation tower is 0.25h, and the concentration of hydrogen peroxide added by the hydrogen peroxide dosing device is 27.50%, which is added in three stages; The residence time of the reaction tank is 0.5h, 0.5h and 0.45h respectively; the surface load of the dense sedimentation tank is 1.80m 3 / m 2 h, the residence time is 3.5h. After the treatment of the process proposed by the present invention, the water quality of the effluent reaches: COD cr <5000mg / L, sulfide <2mg / L, pH 6.5~9.0. The annual reduction of the main pollutant sulfide by the in...

Embodiment 2

[0032] The above-mentioned device is applied to the technical research of denim yarn sizing wastewater treatment in a sizing and dyeing factory. The influent water quality of the printing and dyeing wastewater treatment plant is: COD cr 4800-6300mg / L, sulfide 1200-1500mg / L, pH7.5-8.5. The hydraulic retention time of the control adjustment tank is 18h; the residence time of the three-stage catalytic oxidation tower is 0.20h, and the concentration of hydrogen peroxide added by the hydrogen peroxide dosing device is 27.50%, which is added in three stages; The residence time of the reaction tank is 0.42h, 0.42h and 0.4h respectively; the surface load of the dense sedimentation tank is 1.85m 3 / m 2h, the residence time is 3.2h. After the treatment of the process proposed by the present invention, the water quality of the effluent reaches: COD cr <4000mg / L, sulfide <2mg / L, pH 6.5~8.5. The annual reduction of the main pollutant sulfide by the invented process is 313.7 tons / year....

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Abstract

The invention discloses a method and device for treating circulating spray liquid discharged by a printing and dyeing wastewater deodorization system. The method includes the following steps that 1, circulating spray liquid to be treated is introduced into an adjusting pool, water quantity is adjusted, and water quality is made to be uniform; 2, the circulating spray liquid obtained in step 1 is subjected to three-level catalytic oxidation treatment, and a system COD value is lowered; 3, the circulating spray liquid treated in step 2 is subjected to a three-level flocculation reaction to remove impurities; 4, the circulating spray liquid treated in step 3 is introduced into a dense settling pool, the settled sludge is hung into a pool hopper through a thickener and pumped out through a pump and enters a drying system, and liquid supernatant is introduced into the adjusting pool of a sewage treatment station. By means of the method and device, the discharged water quality can be effectively improved, the content of pollutants is greatly reduced, particularly the index of the main pollutant, namely sulfide, is greatly reduced, and harm to the environment is lowered. By means of the process, normal operation of a sewage treatment system can be maintained, and efficient operation of an anaerobic and aerobic system of the sewage treatment system can be achieved.

Description

technical field [0001] The technical solution of the invention belongs to the field of wastewater treatment, and in particular relates to a method and device for treating circulating spray liquid discharged from a printing and dyeing wastewater deodorization system. Background technique [0002] Each treatment unit of the sewage treatment plant will produce odor during the treatment process. Usually, the sewage treatment process is grille, lifting pump room, grit chamber, regulating tank, aeration tank, secondary sedimentation tank, etc. Odor substances will be produced to varying degrees during these treatments. At the same time, a large amount of sludge treatment (such as thickening and mechanical dehydration) produced by aerobic aeration tanks is also the main cause of odor pollution. [0003] In general sewage treatment, in order to solve the problem of odor, the lye spray absorption tower is used, and the circulating spray liquid discharged from it (the treated wastew...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C02F103/30
CPCC02F1/4672C02F1/5245C02F1/56C02F9/00C02F2001/007C02F2103/30C02F2301/08
Inventor 操家顺李超周仕华谢坤章震漆磊吴园园
Owner 南京飞锦环保科技有限公司
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