Treatment method of waste emulsion

Abstract

The invention discloses a waste emulsion treatment method, relates to the technical field of industrial waste liquid treatment, is used for solving the problems of high technical cost and serious environmental pollution of a traditional waste emulsion treatment process, and comprises the following steps: pre-filtering collected emulsion wastewater to remove part of solid impurities in the emulsion wastewater so as to obtain pre-filtered effluent; the PH adjusting assembly is used for adjusting the PH; heating the pH-adjusted wastewater by using a heat exchange system, introducing the heated wastewater into a microwave oxidation device, and carrying out a microwave-induced oxidation reaction; introducing the reacted wastewater into a coagulative precipitation tank, adding a polymerization ferric chloride coagulant according to the mass ratio of the wastewater in a stirring state, and allowing the coagulated wastewater to enter a precipitation tank for standing; according to the present invention, the coagulative precipitation effluent is introduced into the ceramic membrane filtration device, such that the good treatment effect on the waste emulsion is provided, the whole equipment investment of the treatment process provided by the present invention is small, the occupied area is small, the generated sludge residue amount is less, and the later outsourcing treatment cost is further reduced.

Description

technical field [0001] The invention relates to the technical field of industrial waste liquid treatment, in particular to a treatment method of waste emulsion. Background technique [0002] Emulsion is widely used in the production process of machinery manufacturing and processing enterprises, and its main functions are lubrication, cooling, cleaning and anti-corrosion of metal surfaces. After a period of use, the emulsion will undergo demulsification and deterioration, lose its original characteristics and effectiveness, and need to be replaced periodically. Therefore, waste emulsion that needs to be treated is continuously generated. The waste emulsion belongs to the "National Hazardous Waste List" HW09 It is a kind of hazardous waste, which is discharged into the environment without treatment. [0003] Emulsion wastewater is characterized by high degree of emulsification, stable chemical properties, complex chemical composition, high concentration of organic pollutants ...

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Problems solved by technology

[0003] The characteristics of emulsion wastewater are high degree of emulsification, stable chemical properties, complex chemical composition, high concentration of organic pollutants such as oil, COD can reach tens of thousands to hundreds of thousands of milligrams per liter, and poor biodegradability, high treatment cost and difficulty Big

[0004] At present, many scholars have conducted a lot of research on the treatment methods of emulsion wastewater. Most of the commonly used emulsion treatment processes in China are traditional processes, such as chemical flotation, Fenton oxidation, electrocoagulation, ozone Synergistic oxidation, low-temperature evaporation, biochemical methods and other treatment methods, but these processes mainly have the following limitations: chemical methods such as drug-adding air flotation and Fenton oxidation will produce a large amount of waste residue, which will pollute the environment Large and high outsourcing costs; the ozone oxidation method is suitable for emulsions with low COD concentrations; the evaporation method, the effluent water quality is good, but the energy consumption is high, and the sewage operation cost is high; the biochemical method has high equipment investment and relatively complicated operation management

[0005] Therefore, in view of the deficiencies in the actual production and implementation of the above-mentioned scheme, it is corrected and improved. Afterwards, Fang created the present invention to provide a treatment method for waste emulsion, which is used to solve the problems of high technical cost, large environmental pollution, long treatment process chain and large equipment loss in the traditional waste emulsion treatment process.

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