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Defoaming agent used for wastewater treatment and preparation method thereof

A technology for wastewater treatment and defoaming agent, which is applied in degassed water/sewage treatment, separation methods, chemical instruments and methods, etc. It can solve the problems of long defoaming time, short foam suppression time, and small application range, and achieve excellent Effects of foam suppression and defoaming properties

Inactive Publication Date: 2018-10-16
芜湖凌岳企业管理咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the defoamer prepared by the prior art has the defects of short foam suppression time and long defoaming time, and the application range is small

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0013] The invention provides a kind of preparation method of defoamer, and this preparation method comprises:

[0014] (1) Emulsification reaction of modified silicone oil, sorbitan fatty acid ester, polymethicone, polyoxyethylene polyol ether, sodium lauryl sulfate, aluminum oxide, emulsifier and water to form mixture M1;

[0015] (2) heat treatment after mixing the mixture M1 and silicon dioxide to obtain a defoamer;

[0016] Wherein, the preparation method of modified silicone oil comprises: mixing dimethyl silicone oil and white carbon black, obtaining silicone paste after heating to reflux, and mixing said silicone paste, graphene oxide, hydroxymethyl cellulose, sodium benzoate and dodecyl Sodium alkyl sulfonate is mixed, and the modified silicone oil is obtained after shearing and dispersing evenly; wherein, dimethyl silicone oil and white carbon black are mixed according to a mass ratio of 1:0.1-0.3, relative to 100 parts by weight of For silicone paste, the consumpt...

Embodiment 1

[0025] (1) At 30°C, mix 1kg modified silicone oil, 300g sorbitan fatty acid ester, 400g polymethylsiloxane, 160g polyoxyethylene polyol ether, 100g sodium lauryl sulfate, 180g Alumina, 30g of polyvinylpyrrolidone and 1.8kg of water were emulsified for 4 hours to form a mixture M1;

[0026] (2) Add 60g of silicon dioxide to 1kg of mixture M1, heat and stir at 90°C for 40min to prepare defoamer A1 for waste water treatment; wherein, the preparation method of modified silicone oil comprises: mixing dimethyl silicone oil and Mix white carbon black, heat and reflux to obtain a silicone paste, mix the silicone paste, graphene oxide, hydroxymethyl cellulose, sodium benzoate and sodium dodecylsulfonate, and shear and disperse evenly to obtain the modified Organic silicone oil; Wherein, dimethyl silicone oil and white carbon black are mixed according to the ratio of 1:0.1 according to mass ratio, relative to the silicone paste of 100g, the consumption of graphene oxide is 10g, and the ...

Embodiment 2

[0028] (1) At 25°C, mix 1kg modified silicone oil, 250g sorbitan fatty acid ester, 300g polymethylsiloxane, 150g polyoxyethylene polyol ether, 80g sodium lauryl sulfate, 150g Alumina, 20g cetyltrimethylammonium bromide and 1.5kg water were emulsified for 6 hours to form a mixture M1;

[0029] (3) Add 40 g of silicon dioxide to 1 kg of mixture M1, heat and stir at 80° C. for 60 min to prepare defoamer A2 for wastewater treatment. Wherein, the preparation method of modified silicone oil comprises: mixing dimethyl silicone oil and white carbon black, obtaining silicone paste after heating to reflux, and mixing said silicone paste, graphene oxide, hydroxymethyl cellulose, sodium benzoate and dodecyl Sodium alkyl sulfonate is mixed, and the modified silicone oil is obtained after shearing and dispersing uniformly; wherein, dimethyl silicone oil and white carbon black are mixed according to a mass ratio of 1:0.3, and relative to 100g of silicone paste, the oxidized The consumption ...

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PUM

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Abstract

The invention discloses a defoaming agent used for wastewater treatment and a preparation method thereof. The preparation method comprises the steps that modified organic silicon oil, sorbitan fatty acid ester, polymethyl siloxane, polyoxyethylene polyol ether, lauryl sodium sulfate, aluminium oxide, an emulgator and water are subjected to emulsion reaction to generate a mixture M1; after the mixture M1 and silicon dioxide are mixed, thermal treatment is conducted to prepare the defoaming agent; a preparation method of the modified organic silicon oil comprises the steps that simethicone and white carbon black are mixed, heating reflux is conducted to obtain silicon cream, the silicon cream, graphene oxide, hydroxymethyl cellulose, sodium benzoate and dodecyl sodium sulfate are mixed and subjected to even shearing dispersion, and thus the modified organic silicon oil is obtained. The defoaming agent which is prepared through the method and used for wastewater treatment is long in foaminhibition time and short in defoaming time, and can be applied in sewage treatment processes on a large scale.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a defoamer for waste water treatment and a preparation method thereof. Background technique [0002] In the process of sewage treatment, because the sewage contains a large number of microorganisms, a large number of foams will be produced. These foams are viscous and will involve a large amount of solid substances such as activated sludge into the floating foam layer of the aeration tank, hindering oxygen from entering the aeration. Pool mixture, reducing oxygenation efficiency. The commonly used method of suppressing and removing foam in sewage is mainly to add sewage defoamer, which is an additive that suppresses foam generation or eliminates foam that has already occurred by reducing the surface tension of sewage. Currently commonly used sewage defoamers are divided into three categories: mineral oils, silicones, and polyethers. [0003] At present, the defoamers prepared in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04C02F1/20
CPCB01D19/0404B01D19/0409B01D19/0422C02F1/20
Inventor 吴丹丹
Owner 芜湖凌岳企业管理咨询有限公司
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