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High-efficiency defoaming agent for sewage treatment, and preparation method and application thereof

A technology of sewage treatment and defoaming agent, which is applied in the direction of degassed water/sewage treatment, separation methods, chemical instruments and methods, etc. It can solve the problems of affecting sewage treatment efficiency, complex sewage components, poor defoaming ability, etc., and achieve control Effects of foaming, improving fermentation efficiency, and improving processing capacity

Active Publication Date: 2018-12-18
NANTONG HANTAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex composition of sewage, especially domestic sewage will generate a lot of foam during the treatment process, which will seriously affect the efficiency of sewage treatment, so it is necessary to add defoamers
[0003] At present, the defoamers used in sewage treatment mainly include silicone and polyether. Silicone defoams quickly but has poor foam suppression ability. Polyether defoamer has good foam suppression performance but poor defoaming ability. Some treatment plants use silicone and polyether. Polyether is compounded and used in a large amount, and the cost is high. Therefore, a low-cost defoamer with good defoaming and antifoaming properties is needed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A high-efficiency defoamer for sewage treatment, comprising the following components in parts by weight: 30 parts of polydimethylsiloxane, 2 parts of hydrophobic fumed silica, 20 parts of polyether modified silicone oil, polydithiodipropane 5 parts of sodium sulfonate, 4 parts of isopropyl myristate, 5 parts of n-butyl oleate, 1 part of menthol, 40 parts of deionized water;

[0028] The polydimethylsiloxane is a hydroxyl-terminated polydimethylsiloxane with a viscosity of 1000-2000Cst and a hydroxyl content of 8%-10%;

[0029] The appearance of the polyether modified silicone oil is light yellow transparent oily liquid; when the temperature is 25°C, the density is 1.03g / ml; the viscosity is 2000-3000Cst.

[0030] A preparation method of high-efficiency defoamer for sewage treatment, comprising the following steps:

[0031] (1) Weigh hydrophobic fumed silica and sodium polydisulfide dipropane sulfonate by weight and carry out planetary ball milling in the jar for 1 hour...

Embodiment 2

[0037] A high-efficiency defoamer for sewage treatment, comprising the following components in parts by weight: 32 parts of polydimethylsiloxane, 3 parts of hydrophobic fumed silica, 23 parts of polyether modified silicone oil, polydithiodipropane 6 parts of sodium sulfonate, 5 parts of isopropyl myristate, 6 parts of n-butyl oleate, 2 parts of menthol, 42 parts of deionized water;

[0038] The polydimethylsiloxane is a hydroxyl-terminated polydimethylsiloxane with a viscosity of 1000-2000Cst and a hydroxyl content of 8%-10%;

[0039] The appearance of the polyether modified silicone oil is light yellow transparent oily liquid; when the temperature is 25°C, the density is 1.03g / ml; the viscosity is 2000-3000Cst.

[0040] A preparation method of high-efficiency defoamer for sewage treatment, comprising the following steps:

[0041] (1) Weigh hydrophobic fumed silica and sodium polydisulfide dipropane sulfonate by weight and carry out planetary ball milling in a tank for 1.3 ho...

Embodiment 3

[0047] A high-efficiency defoamer for sewage treatment, comprising the following components in parts by weight: 35 parts of polydimethylsiloxane, 4 parts of hydrophobic fumed silica, 25 parts of polyether modified silicone oil, polydipropylene disulfide 8 parts of sodium sulfonate, 6 parts of isopropyl myristate, 7 parts of n-butyl oleate, 3 parts of menthol, 45 parts of deionized water;

[0048] The polydimethylsiloxane is a hydroxyl-terminated polydimethylsiloxane with a viscosity of 1000-2000Cst and a hydroxyl content of 8%-10%;

[0049] The appearance of the polyether modified silicone oil is light yellow transparent oily liquid; when the temperature is 25°C, the density is 1.03g / ml; the viscosity is 2000-3000Cst.

[0050] A preparation method of high-efficiency defoamer for sewage treatment, comprising the following steps:

[0051] (1) Weigh hydrophobic fumed silica and sodium polydisulfide dipropane sulfonate by weight and carry out planetary ball milling in a jar for 1...

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Abstract

The invention discloses a high-efficiency defoaming agent for sewage treatment, and a preparation method and application thereof. The high-efficiency defoaming agent comprises the following raw materials: polydimethylsiloxane, hydrophobic fumed silica, polyether-modified silicone oil, sodium 3,3'-dithiodipropane sulfonate, isopropyl myristate, n-butyl oleate, menthol and deionized water. The raw materials are easily available, so preparation cost is lowered; the prepared defoaming agent has good defoaming performance and foam suppression performance in water treatment, can effectively controlfoam, improves sewage treatment capacity, reduces pollution, and is very environmentally-friendly; and the defoaming agent also has good defoaming performance and foam suppression performance in fermentation and can improve fermentation efficiency.

Description

technical field [0001] The invention relates to a sewage treatment auxiliary agent, in particular to a high-efficiency defoamer for sewage treatment and its preparation method and application. Background technique [0002] Sewage treatment is the process of purifying sewage to meet the water quality requirements for discharge into a certain water body or reuse. According to the classification of sewage sources, sewage treatment is generally divided into production sewage treatment and domestic sewage treatment. Production sewage includes industrial sewage, agricultural sewage and medical sewage, while domestic sewage is the sewage produced in daily life, which refers to the complex mixture of various forms of inorganic and organic substances. Due to the complex composition of sewage, especially domestic sewage, a large amount of foam will be generated during the treatment process, which seriously affects the efficiency of sewage treatment, so it is necessary to add a defoam...

Claims

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Application Information

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IPC IPC(8): B01D19/04C02F1/20
CPCB01D19/0409B01D19/0422C02F1/20
Inventor 王利
Owner NANTONG HANTAI CHEM
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