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Oil-containing oil emulsion waste water treatment process

A wastewater treatment and emulsion technology, applied in the direction of oxidation water/sewage treatment, water/sewage treatment, flotation water/sewage treatment, etc., can solve the problems of large amount of demulsifier, high input cost, poor effect, etc. The effect of small area, low operating cost and high decolorization rate

Active Publication Date: 2008-08-20
李户元
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Problems solved by technology

However, the current chemical or ion demulsification devices and methods have the following defects: using chemical demulsification, different demulsifiers need to be used according to different emulsion systems, and the amount of demulsifiers is large, and the overall input cost is high; ionization demulsification Milk can only be used for water-in-oil emulsion wastewater, and the effect is very poor for other types of emulsion wastewater

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0021] As shown in the accompanying drawings, the main process flow of the present invention is as follows: oily emulsion wastewater—grid pretreatment—water quality and quantity adjustment—electrochemical demulsification—oxidation—air flotation or precipitation—filtration—clear water . The specific methods of each treatment process in the above-mentioned technological process are as follows:

[0022] (1) In the grid pretreatment process of the process, two grid pretreatments, medium and fine, have been performed successively; the gap of the medium grid is 20mm, and the gap of the fine grid is 5mm, and a manual grid or a mechanical grid can be used. The length or diameter of the impurities contained in the waste water filtered by the grid is less than 5mm; the material of the immersed part is stainless steel, which can be anti-corrosion; the working temperature is 1-5...

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Abstract

The invention discloses a wastewater treatment process of oil-retaining emulsion liquid waste water, which adopts electrochemical demulsification. The technological process is as follows: the oil-retaining emulsion liquid waste water; grate pretreatment; adjustment of water quality and volume; electrochemical demulsification; oxidation or precipitation; filtration; clear water. The electrochemical demulsification and separation reaction pond during electrochemical demulsification has the advantages of continuous demulsification and separation, operation under normal temperature and atmospheric pressure, low operating cost, small occupied area of the complete equipment, convenient maintenance, easy operation, applicability to demulsification and separation of oil-retaining emulsion liquid waste water. The electrochemical demulsification has the advantages of integrated mode of ionization and chemical reaction, optimal demulsification effect, high oil-water separation efficiency, high decoloration efficiency, good effluent close to the standard of tap water examined by sensory organ, high water quality up to first class discharge standard and recyclability.

Description

technical field [0001] The invention relates to a process for treating oily emulsion wastewater, in particular to a process for treating oily emulsion wastewater that achieves demulsification by means of electrochemical demulsification, and belongs to the field of purification and treatment of oily emulsion wastewater. Background technique [0002] The mixed emulsification of oil and water exists in many industrial processes, and it is a phenomenon in which oil molecules and water molecules are contained in a liquid state. Oily emulsion wastewater is very harmful in the industrial process, such as: the unfavorable factors of blocking and corroding pipelines for its transportation pipelines (such as oil pipelines, etc.); when the wastewater is discharged, if the oily emulsion wastewater is not treated, it will be directly Discharge will not only seriously pollute surface water bodies and groundwater sources, destroy the ecological environment, but also...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F1/40C02F1/463C02F1/72C02F1/24C02F1/52
Inventor 李户元
Owner 李户元
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