Defoaming agent for sewage treatment and preparation method thereof

Abstract

The invention relates to a defoaming agent for sewage treatment and a preparation method of the defoaming agent, belonging to the field of defoaming agent production technology. The defoaming agent comprises the components based on parts by weight: 0.8-1 part of diethanol glyceride, 0.8-1 part of ethylene bis stearamide, 2.4-3.6 parts of heavy liquid paraffin, 40-45 parts of engine oil, 20-25 parts of kerosene, 30-32 parts of dimethyl silicone oil and 1-1.4 parts of white carbon black. The invention solves the problem that in the prior art, organic silicon and polyether type defoaming agents are high in price, so that the sewage treatment cost is high; the defoaming agent provided by the invention has the performances equivalent to those of the existing defoaming agent and even superior to those of the existing defoaming agent, so that the defoaming effect is improved, the defoaming speed is accelerated, and the foam inhibition is prolonged; furthermore, the defoaming agent is good in stability and low in cost, and greatly lowers the sewage treatment cost.

Description

technical field [0001] The invention relates to a defoamer and a preparation method thereof. More specifically, the invention relates to a defoamer for sewage treatment and a preparation method thereof, belonging to the technical field of defoamer production. technical background [0002] Domestic sewage, industrial sewage treatment process and water purification process require a large amount of defoamers, especially viscose fibers use a large amount of additives and surfactants in the production process, which increases the surface tension of wastewater and makes it The effluent of the sewage treatment plant produces a large amount of foam during the discharge process. If no defoaming treatment is carried out, a large amount of white foam will be produced, which will float at the outlet with the discharge water, forming a foam layer to block sunlight, air and normal substances and energy of the water body. The exchange affects the natural purification ability of the water ...

AI Technical Summary

Problems solved by technology

[0005] The components and manufacturing process of the above-mentioned patented defoamer make the final product less effective, and the dosage is large and the cost is high

[0006] At present, imported defoamers are mainly used for defoaming, which is expensive (up to 15,300 yuan / ton), and with the rise of international crude oil prices, the unit price of defoamers is still on the rise, and the operating costs are high. 100,000 yuan, the defoaming effect and antifoaming time are not ideal

On the other hand, when the equipment replaces machine parts and other equipment, a large amount of waste engine oil is produced, which mainly enters the waste water at present, which also has a certain impact on the increase of the COD value of the waste water in the system

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