Comprehensive treatment process for coking wastewater

A technology for coking wastewater and comprehensive treatment, applied in the field of water treatment, can solve the problems that the produced water cannot be directly used as production water, and the wastewater cannot be completely treated.

Inactive Publication Date: 2010-09-01
广州泰通环保科技投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned failed to realize the thorough treatment of

Method used

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  • Comprehensive treatment process for coking wastewater
  • Comprehensive treatment process for coking wastewater
  • Comprehensive treatment process for coking wastewater

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Embodiment 1

[0039] Such as figure 1 As shown, the flow chart of Embodiment 1 of the present invention.

[0040] A comprehensive treatment process for coking wastewater, comprising the following steps in sequence:

[0041] ① Ammonia distillation step: recovering ammonia from the coking wastewater, so that the ammonia nitrogen of the coking wastewater is less than 200ppm;

[0042] ②Air flotation step: Select the M50-UP15S integrated dissolved air flotation equipment to recover the wastewater obtained from the ammonia distillation step. The treated water volume is 100T / H, the dissolved air-water ratio is 0.06, and 50ppm flocculant and 5ppm coagulant are added. Run the air flotation process, the hydraulic retention time is 30min, and obtain the first-level pretreatment wastewater; the influent water quality COD is 4100ppm, the oil is 38ppm, the effluent water quality COD is 3700ppm, and the oil is <5ppm;

[0043] ③Hydrolytic acidification step: the primary pretreatment wastewater is dischar...

Embodiment 2

[0052] Such as figure 2 As shown, the flow chart of Embodiment 2 of the present invention.

[0053] A comprehensive treatment process for coking wastewater, comprising the following steps in sequence:

[0054] ① Ammonia distillation step: recovering ammonia from the coking wastewater, so that the ammonia nitrogen of the coking wastewater is less than 200ppm;

[0055] ②Air flotation step: Select the M50-UP15S integrated dissolved air flotation equipment to recover the wastewater obtained from the ammonia distillation step. The treated water volume is 100T / H, the dissolved air-water ratio is 0.06, and 50ppm flocculant and 5ppm coagulant are added. Run the air flotation process, the hydraulic retention time is 30min, and obtain the first-level pretreatment wastewater; the influent water quality COD is 4100ppm, the oil is 38ppm, the effluent water quality COD is 3700ppm, and the oil is <5ppm;

[0056] ③Hydrolytic acidification step: the primary pretreatment wastewater is discha...

Embodiment 3

[0065] A comprehensive treatment process for coking wastewater, comprising the following steps in sequence:

[0066] ① Ammonia distillation step: recovering ammonia from the coking wastewater, so that the ammonia nitrogen of the coking wastewater is less than 200ppm;

[0067] ②Air flotation step: Select the M50-UP15S integrated dissolved air flotation equipment to recover the wastewater obtained from the ammonia distillation step. The treated water volume is 100T / H, the dissolved air-water ratio is 0.06, and 50ppm flocculant and 5ppm coagulant are added. Run the air flotation process, the hydraulic retention time is 30min, and obtain the first-level pretreatment wastewater; the influent water quality COD is 4100ppm, the oil is 38ppm, the effluent water quality COD is 3700ppm, and the oil is <5ppm;

[0068] ③Hydrolytic acidification step: the primary pretreatment wastewater is discharged into the folded plate packing type anaerobic sludge tank; the folded plate packing type ana...

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Abstract

The invention relates to a comprehensive treatment process for coking wastewater, which belongs to the technical field of water treatment and solves the problem that the treatment of the coking wastewater in the prior art is not thorough and the produced water cannot be repeatedly used as water for production. The process comprises the following several steps: ammonia evaporation, air flotation, hydrolysis acidification, anoxic stirring, aerobic degradation, MBR separation and reverse osmosis. The process is applicable to reformation of wastewater treatment and drainage off-standard systems in various coal chemical industries, wastewater source utilization in the coal coking industry and application of wastewater closed internal cycle zero-release engineering in the coal coking industry.

Description

technical field [0001] The invention relates to coking wastewater treatment, in particular to a coking wastewater comprehensive treatment process, which belongs to the technical field of water treatment. The invention is applicable to the transformation of wastewater treatment and drainage systems in various coal chemical industries that do not meet the standard, the resource utilization of wastewater in the coal coking industry, and the application of closed-circuit internal cycle zero discharge projects for wastewater in the coal coking industry. Background technique [0002] Coking wastewater mainly comes from coking gas production, gas purification, recycling and processing of chemical products, etc., including residual ammonia water, asphalt cooling water, final cooling water, dibenzene separation water, tar washing wastewater, etc. The water quality test shows that it contains ammonia nitrogen, phenol, cyanide, sulfide and hundreds of organic compounds. The composition...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30C02F1/24C02F1/44C02F103/34
Inventor 韦旺
Owner 广州泰通环保科技投资有限公司
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