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A high-efficiency combined treatment agent, preparation and advanced pretreatment method of coking wastewater

A treatment method and technology for coking wastewater, applied in chemical instruments and methods, metallurgical wastewater treatment, water/sewage treatment, etc., to achieve the effects of improved effect, stable treatment effect and short treatment process

Active Publication Date: 2020-08-14
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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  • A high-efficiency combined treatment agent, preparation and advanced pretreatment method of coking wastewater
  • A high-efficiency combined treatment agent, preparation and advanced pretreatment method of coking wastewater
  • A high-efficiency combined treatment agent, preparation and advanced pretreatment method of coking wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 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;

[0050] 2. Inject sulfuric acid into the tank through a quantitative pump, and the pH value is 6;

[0051] 3. Dosing the decolorizing adsorbent into the tank through the powder dosing device, the dosing concentration is 300ppm; activated carbon: specific surface area 900m 2 / ml, pore size 10000nm, iodine adsorption value 850mg / g, ash content 5%; slag powder A: particle size 350nm;

[0052] The decolorization and cyanide removal agent includes activated carbon: 50%, slag powder A: 50%.

[0053] 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;

[0054] 5. After decolorization and a...

Embodiment 2

[0057] 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;

[0058] 2. Inject sulfuric acid into the tank through a quantitative pump, and the pH value is 6;

[0059] 3. Dosing the decolorizing adsorbent into the tank through the powder dosing device, the dosing concentration is 310ppm; activated carbon: specific surface area 1200m 2 / ml, pore size 9000nm, iodine adsorption value 950mg / g, ash content 5%; slag powder A: particle size 200nm;

[0060] The decolorization and cyanide removal agent includes activated carbon: 70%, slag powder A: 30%.

[0061] 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;

[0062] 5. After decolorization a...

Embodiment 3

[0065] 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;

[0066] 2. Inject sulfuric acid into the tank through a quantitative pump, and the pH value is 6;

[0067] 3. Add the decolorizing adsorbent to the tank through the powder dosing device, and the dosing concentration is 320ppm;

[0068] 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;

[0069] 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 of industrial liquid alkali, and the coagulant is injected into the tank through the quantitative dosing pump. The dosin...

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Abstract

The invention provides an efficient combined treating agent. The treating agent is prepared from a decolorizing adsorbent and a coagulant by blending, wherein the decolorizing adsorbent comprises components in percentage by weight as follows: 25%-70% of activated carbon and 30%-60% of slag micropowder A, the specific surface area of the activated carbon is 800-1300 m<2> / ml, and the pore diameter is 700-1600 nm; the particle diameter of the slag micropowder A is 100-500 nm; the coagulant comprises components of 40%-60% of aluminum sulfate and 40%-80% of slag micropowder B. The invention further provides a preparation method of the treating agent and a method for treating coking wastewater with the treating agent. The process flow is simple, chemical cost is low, the advanced reuse treatment capacity of the agent is remarkably improved as compared with the traditional advanced reuse treatment capacity, operating load of an advanced reuse system is reduced greatly, advanced reuse investment and operating cost are reduced, and generation amount of advanced reuse strong brine is reduced.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a combined water treatment agent for coking waste, a preparation method for the treatment agent, and an advanced pretreatment method for coking waste water. 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 treat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F1/52C02F103/16
CPCC02F1/281C02F1/5236C02F2103/16
Inventor 王洪洋刘畅
Owner 上海宝汇环境科技有限公司
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