Foam separating and eliminating technology and production line of surface activator

Abstract

The invention discloses a technique and production line to separate and eliminate surface active agent foams in waste water treatment, separating foams by separating column, removing the water carried in the foams by gas-liquid separator, breaking the foams by negative pressure foam breaker, and realizing the separation and elimination by induced draft fan exhausting the foam-broken gas. It is a new method and producing device for the industries as wash, dyeing and printing and leather to treat waste water and improve environmental pollution.

Description

technical field [0001] The invention relates to a technique and a production line for breaking and separating foams on the surface of wastewater, and is particularly suitable for separating and breaking surfactant-like foams. Background technique [0002] Foam separation technology is a special chemical unit process, based on the physical and chemical principle of material gas-liquid surface adsorption as its separation premise, it is widely used in the fields of environmental protection, purification and recovery of biochemical substances, etc. Gas-liquid backmixing in the foam separator is a difficult problem that seriously affects the efficiency of foam separation, and there is no effective design and scale-up method in practical applications, and the large amount of foam formed by foam separation has not been well resolved. Therefore, this technology is greatly limited in popularization and application. [0003] Whether a large amount of high-concentration foam formed b...

AI Technical Summary

Problems solved by technology

Defoamer defoaming is to spray the defoamer on the foam, and use it to take away the solution adjacent to the surface layer when the solution spreads, so that the liquid film is partially thinned, the liquid film is broken, and the foam is broken. The defect of this technology is : The unit processing cost is high, only a small amount of local foam can be broken, and the foam liquid produced has complex components, which is difficult to further process

The disadvantages of this technology are: the steam coil or the steam sheet is easy to scale, it is not easy to clean, the gas after the bubble break is not easy to discharge, it is easy to form secondary foam, the bubble break is not thorough, and due to the use of a large amount of steam, heat radiation is formed Strong, not conducive to operation

The disadvantage of this technology is: because the foam is formed by compressed air, after the foam is broken, the gas in the foam cannot be discharged, and it is easy to form secondary foaming, which makes the foam breaking very incomplete.

[0004] According to statistics, in the wastewater treatment projects of domestic facilities, due to the failure to solve the foam breaking technology well, the whole set of implementation cannot operate normally or the effluent water after operation contains a lot of foam and the water quality is not up to standard, resulting in a great waste of project investment

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