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Efficient combined treating agent, preparation and advanced pretreatment method of coking wastewater

A treatment method and technology for coking wastewater, applied in chemical instruments and methods, water/sewage treatment, metallurgical wastewater treatment, etc., to achieve the effects of reduced investment costs, low production and operation costs, and stable treatment effects

Active 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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  • Efficient combined treating agent, preparation and advanced pretreatment method of coking wastewater
  • Efficient combined treating agent, preparation and advanced pretreatment method of coking wastewater
  • Efficient combined treating 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 the 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 solids is 55mg / l, T-CN is 5mg / l, water temperature is 30℃;

[0050] 2. Inject sulfuric acid into the tank through a quantitative pump with a pH of 6;

[0051] 3. Add the decolorizing adsorbent to 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] Decolorization and cyanide removal agents include activated carbon: 50%, slag powder A: 50%.

[0053] 4. Mix the medicine and water thoroughly with a mixer, the hydraulic retention time is 30mins, and the effluent mixture overflows to the coagulation tank;

[0054] 5. The effluent after decolorization and adsorption enters...

Embodiment 2

[0057] 1. The biochemical effluent (raw water) of the 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 solids is 40mg / l, T-CN is 6.1mg / l, water temperature is 28℃;

[0058] 2. Inject sulfuric acid into the tank through a quantitative pump with a pH of 6;

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

[0060] Decolorization and cyanide removal agents include activated carbon: 70%, slag powder A: 30%.

[0061] 4. Mix the medicine and water thoroughly with a mixer, the hydraulic retention time is 30mins, and the effluent mixture overflows to the coagulation tank;

[0062] 5. The effluent after decolorization and adso...

Embodiment 3

[0065] 1. The biochemical effluent (raw water) of the 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 solids is 54mg / l, T-CN is 5.8mg / l, water temperature is 30℃;

[0066] 2. Inject sulfuric acid into the tank through a quantitative pump with a pH of 6;

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

[0068] 4. Mix the medicine and water thoroughly with a mixer, the hydraulic retention time is 30mins, and the effluent mixture overflows to the coagulation tank;

[0069] 5. The effluent after decolorization and adsorption enters the coagulation tank through overflow. In the tank, the pH is adjusted to 8 through the processing industrial liquid caustic first, and the coagulant is injected into the tank through a quantitative dosing pump, and the concentration is 600ppm, a...

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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 coking waste combined water treatment agent, a preparation method of the treatment agent, and a deep pretreatment method of coking wastewater. Background technique [0002] Coking wastewater is the wastewater formed during high and medium temperature carbonization, gas purification and chemical product refining. It contains organic pollutants such as phenols, benzene series, polycyclic aromatic hydrocarbons, nitrogen-containing heterocyclic compounds, ammonia, cyanide, and sulfur. Cyanide and other inorganic pollutants have complex components and a wide variety of components. The concentration of organic pollutants and the chromaticity of sewage are high, the toxicity is high, and the nature is very stable. It is a typical difficult-to-degrade complex and toxic industrial organic wastewater. In order to meet discharge standards, the treatment is difficult and costly. Improper tre...

Claims

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Application Information

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Patent Type & Authority Applications(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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