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Coking wastewater treatment agent containing slag micropowder, preparation method and treatment method

A technology for slag micro-powder and coking wastewater, which is applied in water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., to achieve the effects of improving cyanide removal efficiency, shortening reaction residence time, and improving adsorption efficiency

Active Publication Date: 2020-09-18
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 containing slag micropowder, preparation method and treatment method
  • Coking wastewater treatment agent containing slag micropowder, preparation method and treatment method
  • Coking wastewater treatment agent containing slag micropowder, preparation method and treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1. The biochemical effluent (raw water) of coking wastewater is pumped to the decolorization and cyanide removal 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;

[0053] 2. Inject sulfuric acid into the tank through a quantitative pump, and the pH value is 5;

[0054] 3. Add the decolorization and cyanide removal agent into the tank through the powder dosing device, and the dosing concentration is 150ppm; the decolorization and cyanide removal agent is composed of the following weight percentages: activated carbon: 50%, slag powder A: 15%, ferrous salt: 35%.

[0055] Activated carbon: specific surface area 1200m 2 / ml, pore size 10000nm, iodine adsorption value 800mg / g, ash content 3%; slag powder A: particle size 300nm, ferrous salt: soluble heptaheptadic ferrous sulfate solid;

[0056] 4. Stir with a mixer to fully mix the medicament ...

Embodiment 2

[0061] 1. The biochemical effluent (raw water) of coking wastewater is pumped to the decolorization and cyanide removal 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;

[0062] 2. Inject sulfuric acid into the tank through a quantitative pump, and the pH value is 4.9;

[0063] 3. Add the decolorization and cyanide removal agent into the tank through the powder dosing device, and the dosing concentration is 160ppm; the decolorization and cyanide removal agent is composed of the following weight percentages: activated carbon: 60%, slag powder A: 15%, ferrous salt: 25%.

[0064] Activated carbon: specific surface area 1400m 2 / ml, pore size 8000nm, iodine adsorption value 800mg / g, ash content 3%; slag powder A: particle size 400nm, ferrous salt: soluble heptaheptadic ferrous sulfate solid;

[0065] 4. Stir with a mixer to fully mix the agent ...

Embodiment 3

[0070] 1. The biochemical effluent (raw water) of coking wastewater is pumped to the decolorization and cyanide removal 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;

[0071] 2. Inject sulfuric acid into the tank through a quantitative pump, and the pH value is 5;

[0072] 3. Add the decolorization and cyanide removal agent into the tank through the powder dosing device, and the dosing concentration is 170ppm;

[0073] 4. Stir with a mixer to fully mix the agent and water, the hydraulic retention time is 25mins, and the effluent mixture overflows to the defluoridation coagulation tank;

[0074] 5. After decolorization and cyanide removal, the effluent enters the defluoridation coagulation tank through the overflow, and the pH is first adjusted to 8 through the processing liquid alkali in the tank, and the defluorination coagulant is injec...

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Abstract

The invention provides a physical and chemical treatment agent for coking wastewater. The physical and chemical treatment agent is prepared from a decoloration cyanogen removing agent and a defluorination coagulant through mixing; the decoloration cyanogen removing agent is prepared from components in percentage by weight as follows: 30%-60% of activated carbon, 15%-25% of slag micropowder A and 15%-35% of ferrite; the defluorination coagulant is prepared from components in percentage by weight as follows: 30%-60% of a calcium chloride solution, 5%-20% of an aluminum sulfate solution and 20%-40% of slag micropowder B. The invention further provides a preparation method of the physical and chemical treatment agent and a method for treating the coking wastewater with the physical and chemical treatment agent. By the aid of the process treatment with the improved physical and chemical treatment agent, the reaction retention time can be shortened by 40%-60%, the COD removal effect can be improved by 10%-25%, the cyanogen removal effect can be improved by 4%-8%, and the use and operation cost can be reduced by 30%-50%.

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 Patents(China)
IPC IPC(8): C02F1/28C02F1/52C02F101/14C02F101/18C02F101/32C02F101/34C02F101/38
CPCC02F1/288C02F1/5236C02F1/5263C02F2101/14C02F2101/18C02F2101/327C02F2101/345C02F2101/38
Inventor 王洪洋刘畅
Owner 上海宝汇环境科技有限公司
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