Method and device for treating a great variety of waste emulsion of high concentration using hyperfiltration membrane method

Abstract

The invention discloses a method for treating the waste emulsion with high concentration and a plurality of varieties by an ultrafiltration membrane method and a device thereof, which belongs to the technical field of waste water and waste liquid treatment. The main technique of the invention is 'dissolved air flotation-ultrafiltration membrane-electrolysis floatation', which can effectively reduce the dosage of medicament and improve emulsion breaking effect by adopting an efficient dissolved air flotation system, moreover, the water for dissolved air flotation, which is taken from a subsequent intermediate water tank, can flexibly adjust and dilute the concentration of the waste water, thus improving the running stability and the shock resistant loading capability of the system. An ultrafiltration membrane with large flux, high separative efficiency and long service life is adopted in an ultrafiltration system to realize oil-water separation and to concentrate the emulsion for a plurality of times and then floating oil is recovered, the waste water generated in ultrafiltration washing is treated again after reflow, thus reducing waste liquid discharging. Electrolysis floatation can remove residual emulsified oil and dissolved oil in the waste water, thus further lowering the COD value of yielding water. When the quality of raw water is changed, an activated carbon adsorption unit can guarantee the quality of the yielding water to be standard. The method and the device of the invention can process waste emulsion with high concentration and a plurality of varieties and have simple and reasonable technique, good quality of yielding water, compact layout of the device, thus facilitating automatic control and realizing recovery of emulsion and recycle economy as well as changing waste to be profitable simultaneously.

Description

technical field [0001] The invention relates to a method and device for treating waste liquid, in particular to a method for treating high-concentration and various types of waste emulsion by ultrafiltration membrane method and a device for realizing the method, belonging to the technical field of waste water and waste liquid treatment. Background technique [0002] For a long time, my country's water environment has been facing the dual pressure of water pollution and water resource shortage. my country accounts for 6% of the world's water resources, but the per capita water resources are only 1 / 4 of the world's average level. It is listed by the United Nations as one of the 13 most water-deficient countries in the world. Among the more than 600 cities in China, more than 400 are currently short of water, and more than 100 of them are seriously short of water. Moreover, the water-scarce areas have expanded from North China and Northwest China to areas rich in water resourc...

AI Technical Summary

Problems solved by technology

Various treatment methods have their own characteristics and applicable conditions, and because of the wide variety of waste emulsions, complex components, oil content and oil forms in water are also different, making it often difficult to centralize treatment

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