Coal chemical wastewater pretreatment method and pretreatment system

A coal chemical wastewater and pretreatment technology, which is applied in multi-stage water treatment, water/sewage treatment, natural water treatment, etc., can solve the problems of restricting industrialization promotion, a large amount of iron sludge, and high cost of chemicals, so as to improve the ability of flocculation and sedimentation , fast response and low operating cost

Pending Publication Date: 2018-08-10
HEBEI CHAOLYU ENERGY SAVING ENVIRONMENTAL PROTECTION TECH CO LTD
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Problems solved by technology

At present, the Fenton method has been widely researched and demonstrated in the field of high-concentration organic wastewater treatment, but the high cost of the proces

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  • Coal chemical wastewater pretreatment method and pretreatment system
  • Coal chemical wastewater pretreatment method and pretreatment system

Examples

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Example Embodiment

[0038] Example one

[0039] This embodiment relates to the treatment of coal chemical wastewater.

[0040] The coal chemical wastewater is treated in the following pretreatment system:

[0041] Along the flow of wastewater, the treatment system includes a first flocculation sedimentation tank, a number of catalytic oxidation towers connected in series, an internal electrolysis reaction tower, and a second flocculation sedimentation tank. The first flocculation sedimentation tank and the second flocculation sedimentation tank The tops of each are equipped with a dosing port, which is connected to the dosing tank through a pipeline, and is used to add flocculant to the first flocculation sedimentation tank and the second flocculation sedimentation tank; in the first flocculation sedimentation tank and the second flocculation sedimentation tank The bottom of the flocculation sedimentation tank is equipped with a sewage outlet to discharge the sediment at the bottom of the tank. The in...

Example Embodiment

[0050] Example two

[0051] This embodiment relates to the treatment of coal chemical wastewater.

[0052] The coal chemical wastewater is treated in the following pretreatment system:

[0053] Along the flow of waste water, the treatment system includes a first flocculation sedimentation tank, an inner electrolysis reaction tower, a second flocculation sedimentation tank, and a number of catalytic oxidation towers connected in series, in the first flocculation sedimentation tank and the second flocculation sedimentation tank. The tops of each are equipped with a dosing port, which is connected to the dosing tank through a pipeline, and is used to add flocculant to the first flocculation sedimentation tank and the second flocculation sedimentation tank; in the first flocculation sedimentation tank and the second flocculation sedimentation tank The bottom of the flocculation sedimentation tank is equipped with a sewage outlet to discharge the sediment at the bottom of the tank. The ...

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Abstract

The invention discloses a coal chemical wastewater pretreatment method. The method includes flocculent settling treatment, hydrogen peroxide catalytic oxidation treatment and internal electrolysis treatment, and effluent quality reaches that COD is smaller than or equal to 500mg/L, ammonia nitrogen content is smaller than or equal to 200mg/L, and suspended matter content is smaller than or equal to 70mg/L after treatment. After treatment according to the pretreatment method, wastewater available for biochemical treatment is obtained and can be directly discharged or recycled after biochemicaltreatment. A treatment system is stable in operation, and biochemical degradability of coal chemical wastewater is effectively achieved. The coal chemical wastewater pretreatment method and the pretreatment system have positive popularization significance and remarkable application value.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a pretreatment method and a pretreatment system for coal chemical wastewater. Background technique [0002] The overall situation of my country's energy is "rich in coal, poor in oil, and low in gas". Coal accounts for about 70% of my country's primary energy consumption structure, which is much higher than the global average of about 30%. Therefore, abundant coal resources provide strong conditions for the development of my country's coal chemical industry. Coal chemical industry refers to the process of converting coal into gas, liquid, solid chemical and energy products through chemical processing using coal as raw material. And with the breakthroughs in technologies such as coal-to-oil, coal-to-gas, and coal-to-olefins, my country's coal chemical industry is transforming into a new type of coal chemical industry based on petroleum substitute products. [0003] ...

Claims

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Application Information

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IPC IPC(8): C02F9/06C02F103/34
CPCC02F9/00C02F2301/08C02F2103/34C02F1/722C02F1/725C02F1/54C02F1/5236C02F1/461
Inventor 王占军刘婷王立鹏
Owner HEBEI CHAOLYU ENERGY SAVING ENVIRONMENTAL PROTECTION TECH CO LTD
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