Defoaming agent and preparation method thereof

Abstract

The invention discloses a defoaming agent and a preparation method thereof, and relates to the technical field of defoaming agents. The defoaming agent comprises the following components in parts by weight: 5-15 parts of an emulsifier, 15-25 parts of a high alcohol mixture, 5-15 parts of a dispersing agent, 3-10 parts of a scale inhibitor and 8-20 parts of polyether, wherein the emulsifier comprises Tween 60, Span 80 and liquid paraffin. The defoaming agent prepared by the formula has good defoaming, foam inhibition, dispersion and scale inhibition performances, has a boiling point higher than that of water, and cannot overflow along with water vapor.

Description

technical field [0001] The invention relates to the technical field of defoamers, in particular to a defoamer and a preparation method thereof. Background technique [0002] Common evaporators are vacuum evaporators, MVR evaporators or multi-effect evaporators. The evaporator does not have high requirements for the incoming water. However, if the salt content or COD content in the water quality in the evaporator is too high, it is easy to produce foam, Easy to scale, scaling will affect the heat transfer efficiency, and high foam content will cause the liquid level to rise, affect the water intake, and then lead to a decrease in water production, and the foam will flood the heat transfer device, affecting heat transfer efficiency, which will also lead to production The water rate drops; in addition, the foam will enter the subsequent process with the steam, affecting the amount of acid and alkali, and in severe cases, the produced water will not meet the standard. Contents...

AI Technical Summary

Problems solved by technology

[0002] Common evaporators are vacuum evaporators, MVR evaporators or multi-effect evaporators. The evaporator does not have high requirements for the incoming water. However, if the salt content or COD content in the water quality in the evaporator is too high, it is easy to produce foam, Easy to scale, scaling will affect the heat transfer efficiency, and high foam content will cause the liquid level to rise, affect the water intake, and then lead to a decrease in water production, and the foam will flood the heat transfer device, affecting heat transfer efficiency, which will also lead to production The water rate drops; in addition, the foam will enter the follow-up process with the steam, affecting the amount of acid and alkali, and in severe cases, the produced water will not meet the standard

Images