Defoaming agent for sewage treatment and preparation method thereof

Abstract

The invention relates to a defoamer for sewage treatment and a preparation method thereof, belonging to the technical field of defoamer production. The defoamer of the present invention comprises the following components in parts by weight: 0.8 to 1 part of diethyl glyceride, 0.8 to 1 part of ethylene bisstearamide, 2.4 to 3.6 parts of heavy liquid paraffin, 45 to 40 parts of machine oil, 20-25 parts of kerosene, 30-32 parts of dimethyl silicone oil, and 1-1.4 parts of white carbon black. The present invention solves the problem that the price of organosilicon and polyether defoamers and defoamers in the prior art is high, which makes the cost of sewage treatment high. The invention is superior to existing defoamers, can improve its defoaming effect, defoaming speed and foam suppression time, has good stability and low cost, and greatly reduces the cost of sewage treatment.

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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