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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 process reagents restricts its industrialization, and a large amount of iron sludge will be generated during the oxidation process, which is likely to cause secondary pollution

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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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Effect test

Embodiment 1

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

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

[0041] Along the waste water flow direction, the treatment system includes a first flocculation sedimentation tank connected in sequence, a number of catalytic oxidation towers connected in series, an internal electrolysis reaction tower and a second flocculation sedimentation tank. The top of each is equipped with a dosing port, and the dosing port is connected to the dosing box through a pipeline, and is used to add flocculant to the first flocculation-settling tank and the second flocculation-settling tank; between the first flocculation-settling tank and the second The bottom of the flocculation sedimentation tank is equipped with a sewage outlet for discharging the sediment at the bottom of the tank. A microporous aerator is provided at the inner bottom of the catalytic oxidation tower, and the micr...

Embodiment 2

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

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

[0053] Along the waste water flow direction, the treatment system includes a first flocculation sedimentation tank, an internal electrolytic reaction tower, a second flocculation sedimentation tank, and several catalytic oxidation towers connected in series. The top of each is equipped with a dosing port, and the dosing port is connected to the dosing box through a pipeline, and is used to add flocculant to the first flocculation-settling tank and the second flocculation-settling tank; between the first flocculation-settling tank and the second The bottom of the flocculation sedimentation tank is equipped with a sewage outlet for discharging the sediment at the bottom of the tank. A microporous aerator is provided at the inner bottom of the catalytic oxidation tower, and the microporous aerator is connec...

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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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