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Advanced treatment method of coking wastewater

A technology for coking wastewater and advanced treatment, which is used in oxidized water/sewage treatment, water/sewage treatment, anaerobic digestion treatment, etc. The effect of strengthening catalytic decomposition, increasing diversity and total amount, and high treatment efficiency

Inactive Publication Date: 2021-04-30
桃江县德聚人和中小企业公共服务平台有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The A2 / O biochemical process includes a two-stage treatment process. The first-stage treatment first separates the pollutants in the high-concentration wastewater, mainly including ammonia water dephenolization, ammonia water distillation, and final cold water decyanation. The waste water is further treated in a harmless manner. The methods used include activated sludge method and bioaugmentation method. Compared with the general advanced treatment method, although the effect is better, due to the existence of various refractory organic substances, the treatment efficiency will be lower. Low, the treated wastewater is often difficult to meet the direct discharge standard

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  • Advanced treatment method of coking wastewater

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Effect test

Embodiment 1

[0024] The advanced treatment method of coking wastewater is as follows:

[0025] The coking wastewater enters the separator, which can separate the coking wastewater from light and heavy oil. The separated coking wastewater is heated to 55°C and enters the interior of the ammonia still. Enter the coagulator, add polyacrylamide and reinforced polysilicate ferric sulfate with a weight ratio of 1:2.2, adjust the pH of the system to 10 after stirring and coagulating for 2 hours, then add H2O2, the weight ratio of H2O2 and reinforced polysilicate ferric sulfate 1:85, turn on the microwave generator, carry out microwave treatment, the microwave power is 400W, the temperature of microwave treatment is 40°C, the time is 50min, after standing for 10h, absorb the clear liquid; among them, the preparation of reinforced polysilicate ferric sulfate The method is as follows: mix diatomite and polysilicate ferric sulfate uniformly according to the weight ratio of 2:1, then add carbon black ...

Embodiment 2

[0027] The advanced treatment method of coking wastewater is as follows:

[0028] The coking wastewater enters the separator, which can separate the coking wastewater from light and heavy oil. The separated coking wastewater is heated to 50°C and enters the interior of the ammonia still. Enter the coagulator, add polyacrylamide and reinforced polysilicate ferric sulfate with a weight ratio of 1:2, adjust the pH of the system to 10 after stirring and coagulating for 1 hour, then add H2O2, the weight ratio of H2O2 and reinforced polysilicate ferric sulfate 1:80, turn on the microwave generator, and carry out microwave treatment, the microwave power is 200W, the temperature of microwave treatment is 35°C, and the time is 40min. The method is as follows: mix diatomite and polysilicate ferric sulfate uniformly according to the weight ratio of 2:1, then add carbon black with a total weight of 0.5% of diatomite and polysilicate ferric sulfate, ball mill through an 80-mesh screen, and...

Embodiment 3

[0030] The advanced treatment method of coking wastewater is as follows:

[0031]The coking wastewater enters the separator, which can separate the coking wastewater from light and heavy oil. The separated coking wastewater is heated to 55°C and enters the interior of the ammonia still. Enter the coagulator, add polyacrylamide and reinforced polysilicate ferric sulfate with a weight ratio of 1:2.4, adjust the pH of the system to 10 after stirring and coagulating for 5 hours, then add H2O2, the weight ratio of H2O2 and reinforced polysilicate ferric sulfate 1:100, turn on the microwave generator, carry out microwave treatment, the microwave power is 400W, the temperature of microwave treatment is 40°C, the time is 60min, after standing for 15h, absorb the clear liquid; among them, the preparation of reinforced polysilicate ferric sulfate The method is as follows: mix diatomite and polysilicate ferric sulfate uniformly according to the weight ratio of 2:1, then add carbon black ...

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Abstract

The invention relates to the technical field of coking wastewater treatment, in particular to a coking wastewater advanced treatment method. The method comprises the following steps: enabling coking wastewater to enter a separator, evaporating ammonia gas in the coking wastewater from the separated coking wastewater under negative pressure, then enabling the coking wastewater to enter a coagulator, adding polyacrylamide and reinforced polysilicate ferric sulfate, adding H2O2, performing microwave treatment, and absorbing a clear liquid; and feeding the clear liquid into an anaerobic generator for denitrification reaction, feeding the wastewater subjected to denitrification reaction into an aerobic generator, filtering the wastewater through a sand filter, crushing a filter material in advance, controlling the particle size to be 0.5-1 mm, performing nano ozone catalytic oxidation reaction on the wastewater subjected to sand filtration, and feeding the wastewater subjected to sand filtration into a micro-filter for micro-filtration. The method is mature and stable in process, high in treatment efficiency, low in operation cost and convenient to operate and manage, has a good treatment effect and treatment efficiency on inorganic pollutants such as ammonia, nitrogen and cyanogen and various organic pollutants such as phenols, naphthalene, pyridine and quinoline in the coking wastewater, and is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to the technical field of coking wastewater treatment, in particular to an advanced treatment method for coking wastewater. Background technique [0002] With the enhancement of people's awareness of environmental protection, people pay more and more attention to the pollution problem of coking industry. Among them, the post-treatment problem of coking wastewater is becoming more and more prominent. Coking wastewater is wastewater produced in the process of coal coke, gas purification and chemical product refining. Organic Pollutants. [0003] Conventional advanced treatment methods mainly include flocculation, activated carbon adsorption, membrane separation, etc. Among them, the treatment equipment of the flocculation method occupies a large area and consumes a lot of chemicals, which leads to an increase in treatment costs; and the treatment principle of the flocculation method is to transfer undegraded organic pollutants fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/34
CPCC02F1/001C02F1/04C02F1/20C02F1/302C02F1/40C02F1/444C02F1/5236C02F1/56C02F1/66C02F1/722C02F1/725C02F1/78C02F3/02C02F3/28C02F3/30C02F3/342C02F9/00C02F2103/34
Inventor 陈志高陈凯波
Owner 桃江县德聚人和中小企业公共服务平台有限公司