Conduction oil waste water treatment process

Abstract

The invention relates to a process for treating heat-conducting oil wastewater. The process comprises a plurality of working procedures of centrifugal separation, distillation refining, air flotation, G-BAF biotreatment, filtration, the drying and air curing of sludge and incineration. The process has the advantages of simple process technology, low operating expense, high recovery rate of oil products and good sewage treatment effect; and the process is utilized to effectively treat the heat-conducting oil wastewater produced in the operation of heating equipment of industrial and civil devices and contributes to the resource utilization of waste and environmental protection.

Description

Technical field: [0001] The invention relates to a treatment process technology for waste water produced by heat conduction working medium of industrial and civil heating devices, which belongs to the category of sewage treatment and environmental protection technology. Background technique: [0002] Heat transfer oil is the working medium used in the production and operation of various industrial and civil heating facilities. It has a wide range of applications and a large amount. After the heat transfer oil is used in the corresponding equipment and facilities, a large amount of waste water will be generated. If it is discharged without treatment, it will inevitably cause serious pollution to the environment. Therefore, various methods must be used to treat it. Since heat transfer oil wastewater mainly contains dibenzyltoluene (DBT), benzylbenzene (BT), alkylbenzene, toluene, chlorotoluene and ferric chloride, the composition is very complex, and benzene substances account...

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Problems solved by technology

Among them, the operation of the activated sludge process is relatively stable, but it occupies a large area and consumes a lot of power, the operation management is complicated, and the sludge cultivation time is relatively long. The mud must be re-cultivated; in the biofilm method, both the biological turntable and the contact oxidation must be equipped with a secondary sedimentation tank, which increases the land occupation area and treatment costs; the aerated biological filter integrates adsorption, oxidation and filtration, and the treatment effect is good. The amount of sludge low power consumption, good effluent quality, is currently an advanced technology for water treatment, but because ordinary biological aerated filters use glass, ceramics and other materials with large specific gravity as filter materials, the biggest problem encountered in operation is the reverse It is difficult to flush; the biological method has good adaptability to the volatility of wastewater, and the cost of wastewater treatment is low, but it occupies a large area, requires high one-time investment, and has strict requirements for influent water. The treatment of mud is not perfect, and the energy utilization rate is low, which is easy to cause secondary pollution

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