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Coking wastewater reduction treatment method

A technology of coking wastewater and treatment methods, which is applied in metallurgical wastewater treatment, oxidized water/sewage treatment, multi-stage water treatment, etc. It can solve the problems of direct discharge that cannot meet discharge standards, corrosion and scaling of equipment pipes and nozzles, and pollution of high-concentration salt water To avoid problems such as high concentration of pollutants, to achieve reduction and resource utilization, reduce outsourcing costs, and strengthen the effect of treatment

Inactive Publication Date: 2021-11-05
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The wastewater after advanced treatment, while obtaining most of the primary pure water, also produces a large proportion of high-salinity concentrated water. The high-concentration brine has a high concentration of pollutants and high salt content, and direct discharge cannot meet the discharge standards. Conventional The biochemical treatment of concentrated brine is more difficult. In the past, the treatment of concentrated brine was to use it to flush slag. However, concentrated brine is easy to cause corrosion and scaling on equipment pipes and nozzles. Some companies also use evaporation and crystallization to treat it. However, this method High equipment investment and operating costs

Method used

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  • Coking wastewater reduction treatment method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method of treating a coking wastewater reduction, including the steps of:

[0029] 1 Znso 4 , Aeration time is 20 minutes, standing for 30 min.

[0030] 2, the supernatant enters the back-end high-efficiency shallow ionic air floating pool, putting the FESO of 40mg / L at the imported concrete 4 The auxiliary polyacrylamide (APAM) of the aiding agent, the residence time is provided to 10 min, and after thoroughly mixing, the scum is from the screw floating collecting device to the slag cell, and the water entering the secondary sedimentation area, using The tubular precipitation method is divided into a series of shallowly precipitated layers by tilted parallel tubes, and the precipitate moves and separated in the respective deposition shallow layers to achieve the purpose of precipitation.

[0031] 3, the precipitation of 40 min after gravity effluent into the biochemical homogeneous tank, the wastewater after the homogeneous metric is increased into the V-type biofine f...

Embodiment 2

[0040] A method of treating a coking wastewater reduction, including the steps of:

[0041] 1 Znso 4 The aeration time is 25 minutes, and stands for 35min.

[0042] 2, the supernatant enters the bacterial high-efficiency shallow ionic air floating pool at the rear end, and the FESO of the coagulator 45mg / L is put. 4 The anionic polyacrylamide (APAM) of the condalent agent 15mg / L, the residence time is provided to 13 min, and after sufficiently mixing, the scum is from the screw floating collecting device to the slag cell, and the water entering the end of the precipitation area, using The tubular precipitation method is divided into a series of shallowly precipitated layers by tilted parallel tubes, and the precipitate moves and separated in the respective deposition shallow layers to achieve the purpose of precipitation.

[0043] 3, the clear water gravity after 45 min effluent into the biochemical homogeneous tank, the wastewater after homogeneous metric passes through the p...

Embodiment 3

[0052] A method of treating a coking wastewater reduction, including the steps of:

[0053] 1 Znso 4 , Aeration time is 30 minutes, standing for 40 min.

[0054] 2, the supernatant enters the bacterial high-efficiency shallow ionic air floating pool at the rear end, and the FESo of the coagulant 50mg / L is added at the import. 4 , The anionic polyacrylamide (APAM) of the aiding agent, the residence time is provided to 15 minutes, and after sufficiently mixing flocculation, the scum is brought into the slag cell through the spiral scum collection device, and the water entering the secondary sedimentation area, using The tubular precipitation method is divided into a series of shallowly precipitated layers by tilted parallel tubes, and the precipitate moves and separated in the respective deposition shallow layers to achieve the purpose of precipitation.

[0055] 3. The precipitation of 50 min after gravity effluent into the biochemical homogeneous pool, the wastewater after homoge...

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Abstract

The invention relates to the technical field of industrial wastewater treatment, and in particular, relates to a coking wastewater reduction treatment method. After coking wastewater is treated by a regulating tank, an air flotation oil removal process, a coagulating sedimentation process, a biochemical homogenizing tank, a biological filter tank, a secondary sedimentation tank, a UV advanced ozone oxidation process, an ultrafiltration process, a reverse osmosis process, a chemical softening tank, a sand filtration process, a resin process, a regulating tank, an ultrafiltration process, a nanofiltration process and a bipolar membrane electrodialysis process, generated acid and alkali can be used for recycling in the processes of pH regulation and the like in the treatment process; and the resource utilization of the coking wastewater is realized, the outsourcing cost of reagents is reduced, the energy consumption in the technological process is low, the cost is low, the equipment is simple, the operation is easy, the treatment effect is stable, and the treatment effect is enhanced by a water treatment agent selected in the treatment process.

Description

Technical field [0001] The present invention relates to the field of industrial wastewater treatment, and more particularly to a method of treating a coking wastewater reduction. Background technique [0002] Coking wastewater is toxic and harmful, difficult to degrade high concentration organic wastewater, where organic matter is mostly phenolic compounds, accounting for half of the total organic matter, including polycyclic aromatic compounds and chromogenic compounds containing nitrogen-containing, oxygen, carbon The inorganic contaminants are mainly based on ammonia nitrogen, cyanide, sulfide, and cyanide. [0003] At present, most of the domestic coking plant wastewater treatment systems adopt a level of treatment and secondary treatment, but in recent years, a three-level processing process has been started. The primary treatment refers to the recovery of contaminants in high concentration wastewater, including ammonia water depinol, ammonia water distillation, end cold wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F5/06C02F5/02C02F1/42C02F1/469C02F101/16C02F101/18C02F101/32C02F101/34C02F103/16
CPCC02F9/00C02F5/06C02F5/02C02F1/442C02F1/444C02F1/4695C02F1/24C02F5/125C02F7/00C02F1/56C02F1/5236C02F1/40C02F2001/007C02F3/00C02F1/32C02F1/78C02F1/20C02F1/004C02F2101/16C02F2103/16C02F2001/425C02F2101/345C02F2101/32C02F2101/18C02F2301/043C02F2303/22C02F2303/16C02F2301/08
Inventor 刘芳马光宇胡绍伟陈鹏王飞王永徐伟张冲
Owner ANGANG STEEL CO LTD
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