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Coking wastewater treatment agent, preparation method and treatment method

A technology for coking wastewater and treatment methods, which is applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., to achieve the effects of reduced operating costs, easy operation and shortened reaction residence time

Inactive Publication Date: 2017-06-13
上海宝汇环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Basically, all domestic coking wastewater treatment devices must be upgraded to meet the discharge requirements; at the same time, the management level of treatment facilities must be further improved

Method used

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  • Coking wastewater treatment agent, preparation method and treatment method
  • Coking wastewater treatment agent, preparation method and treatment method
  • Coking wastewater treatment agent, preparation method and treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045]1. The biochemical effluent (raw water) of coking wastewater is pumped to the decolorization adsorption tank through the raw water pump. Raw water quality: Raw water quality: pH is 8, COD is 350mg / l, oil is 11mg / l, suspended matter is 55mg / l, T-CN is 5mg / l, water temperature is 30°C;

[0046] 2. Inject sulfuric acid into the tank through a quantitative pump, and the pH value is 6;

[0047] 3. Dosing the decolorizing adsorbent into the tank through the powder dosing device, the dosing concentration is 100ppm; the compounding ratio and specifications of the decolorizing adsorbent are as follows: Activated carbon A: specific surface area 1200m 2 / ml, pore size 20000nm, iodine adsorption value 600mg / g, ash content 5%; activated carbon B: specific surface area 600m 2 / ml, pore size 1000nm, iodine adsorption value 700mg / g, ash content 5%. Activated carbon A: 50%, activated carbon B: 50%.

[0048] 4. Stir with a mixer to fully mix the medicine and water, the hydraulic retent...

Embodiment 2

[0052] 1. The biochemical effluent (raw water) of coking wastewater is pumped to the decolorization adsorption tank through the raw water pump. Raw water quality: Raw water quality: pH is 7.8, COD is 310mg / l, oil is 10mg / l, suspended matter is 40mg / l, T-CN is 6.1mg / l, water temperature is 28°C;

[0053] 2. Inject sulfuric acid into the tank through a quantitative pump, and the pH value is 6;

[0054] 3. Dosing the decolorizing adsorbent into the tank through the powder dosing device, the dosing concentration is 110ppm; the compounding ratio and specifications of the decolorizing adsorbent are as follows: Activated carbon A: specific surface area 750m 2 / ml, pore size 8000nm, iodine adsorption value 700mg / g, ash content 5%; activated carbon B: specific surface area 900m 2 / ml, pore size 650nm, iodine adsorption value 800mg / g, ash content 6%. Mass ratio: activated carbon A: 40%, activated carbon B: 60%.

[0055] 4. Stir with a mixer to fully mix the medicine and water, the hy...

Embodiment 3

[0059] 1. The biochemical effluent (raw water) of coking wastewater is pumped to the decolorization adsorption tank through the raw water pump. Raw water quality: Raw water quality: pH is 7.5, COD is 280mg / l, oil is 9.5mg / l, suspended matter is 54mg / l, T-CN is 5.8mg / l, water temperature is 30°C;

[0060] 2. Inject sulfuric acid into the tank through a quantitative pump, and the pH value is 6;

[0061] 3. Add the decolorizing adsorbent into the tank through the powder dosing device, and the dosing concentration is 120ppm;

[0062] 4. Stir with a mixer to fully mix the medicine and water, the hydraulic retention time is 30mins, and the effluent mixture overflows to the coagulation tank;

[0063] 5. After decolorization and adsorption, the effluent enters the coagulation tank through the overflow. In the tank, the pH is first adjusted to 8 through the processing liquid alkali, and the coagulant is injected into the tank through the quantitative dosing pump. The dosing concentrat...

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Abstract

The invention provides a coking wastewater treatment agent. The treatment agent is prepared from a decolorizing adsorbent and a defluorination coagulant through mixing; the decolorizing adsorbent is prepared from components in percentage by weight as follows: 25%-40% of activated carbon A and 25%-50% of activated carbon B; the activated carbon A has the specific surface area of 600-1,300 m<2> / ml and the pore diameter of 800-25,000 nm; the activated carbon B has the specific surface area of 500-1,000 m<2> / ml and the pore diameter of 300-1,200 nm; the coagulant is an aluminum sulfate solution. The invention further provides a preparation method of the treatment agent and a method for treating coking wastewater with the treatment agent. Through the process treatment of the improved treatment agent, the reaction retention time can be shortened by 10%-20%; the COD removal effect can be increased by 10%-25%, the use and operation cost can be decreased by 10%-50%, and the investment cost can be decreased by 20%-30%.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a coking waste water treatment agent and a coking waste water treatment method. Background technique [0002] Coking wastewater is the wastewater formed during high-temperature and medium-temperature dry distillation of coal, gas purification and chemical product refining, which contains organic pollutants such as phenols, benzene series, polycyclic aromatic hydrocarbons, and nitrogen-containing heterocyclic compounds, as well as ammonia, cyanide, sulfur, etc. Inorganic pollutants such as cyanide have complex components, a wide variety of components, high concentration of organic pollutants and high chroma of sewage, high toxicity, and very stable properties. It is a typical refractory complex toxic industrial organic wastewater. It is difficult and costly to meet the discharge standards. If the treatment is not done properly, it will cause great harm to the national water en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/52C02F101/14C02F101/18C02F101/32C02F101/34C02F101/38
Inventor 王洪洋刘畅
Owner 上海宝汇环境科技有限公司