Method for treating semi-coke wastewater obtained by producing coal

A treatment method, semi-coke wastewater technology, applied in water/sewage multi-stage treatment, extraction water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as inability to recycle phenols

Inactive Publication Date: 2015-01-28
SHAANXI HUALU CHEM ENVIRONMENTAL PROTECTION
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Problems solved by technology

At present, its treatment is to remove it through chemi

Method used

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specific Embodiment

[0011] Specific embodiment: Emulsion liquid membrane separation technology is a kind of efficient liquid-liquid separation method, and it separates the different but mutually miscible solutions by the interfacial liquid phase film that forms between two liquid phases, through selective permeation, The material is separated and purified.

[0012] The present invention uses liquid membrane separation technology to treat semi-carbon wastewater by using tributyl phosphate (TBP) as a carrier, kerosene as a membrane solvent, and NaOH solution as an internal water phase, and recovers phenol. The steps include three steps of milk making, extraction and demulsification , Milking step: Mix polyamine surfactant, tributyl phosphate (TBP) and aviation kerosene evenly, add NaOH solution of inner water phase reagent when the stirring speed is 2000 r / min, and rapidly increase the stirring speed to 4000 r / min, stirred under the condition of 4000 r / min for 15min to obtain a stable emulsion; ext...

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Abstract

The invention relates to a method for treating semi-coke wastewater by producing coal and belongs to the field of wastewater treatment in coal processing. In order to solve the problem that phenols in wastewater cannot be recycled, the invention provides a treatment method which can be used for treating semi-coke wastewater and recovering phenol matters. The treatment method is used for treating semi-coke wastewater by adopting a liquid membrane separating technology, taking tributyl phosphate (TBP) as a carrier, kerosene as a membrane solvent and a NaOH solution as an internal aqueous phase and recovering phenols. The COD (chemical oxygen demand) removal rate of phenol by virtue of use of treatment method reaches over 83% and the phenol removal rate reaches over 85%. The oil phase after treatment can be recycled and the aqueous phase after treatment can be recovered.

Description

technical field [0001] The invention belongs to the field of wastewater treatment in coal processing. Background technique [0002] Semi-coke wastewater refers to the wastewater generated during the dry distillation process of coal at medium and low temperatures (about 650°C), and the main pollutants contained are phenols, including unit phenols and polyphenols. The treatment of phenols is a difficult point in the treatment of semi-coke wastewater. Phenols are not only toxic and refractory pollutants, but also available resources. At present, its treatment is to remove it through chemical reaction, and the phenols in it cannot be recycled. Contents of the invention [0003] The purpose of the present invention is to provide a treatment method capable of treating semi-coke wastewater and recovering phenolic substances. [0004] The present invention is realized through the following technical solutions: a method for treating semi-coke wastewater from coal, including three...

Claims

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Application Information

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IPC IPC(8): C02F9/12C02F1/26
CPCC02F9/00C02F1/26C02F1/48
Inventor 陆强
Owner SHAANXI HUALU CHEM ENVIRONMENTAL PROTECTION
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