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A bulk type power plant desulfuration defoamer and a preparing method thereof

A technology of defoaming agent and power plant, applied in the field of defoaming agent, can solve the problems such as not being able to defoam for a long time, and achieve the effect of increasing emulsion stability, obvious thickening effect, and fast diffusion speed

Inactive Publication Date: 2019-04-02
湖北新四海化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that it cannot defoam for a long time in an acid-base environment

Method used

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  • A bulk type power plant desulfuration defoamer and a preparing method thereof
  • A bulk type power plant desulfuration defoamer and a preparing method thereof
  • A bulk type power plant desulfuration defoamer and a preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] S1: Take polyether polyol L61100g, L62100g, fatty acid is stearic acid 16.7g in a 500ml three-necked flask, gradually warm up to 70°C until the stearic acid is completely dissolved, add 0.67g p-toluenesulfonic acid as an acidic catalyst, Stir and keep the temperature at 130-160°C for 4-8 hours, and remove the reacted water under reduced pressure to obtain the reactant of polyether polyol and fatty acid ester;

[0031] S2: Take 100g of low-hydrogen silicone oil with a hydrogen content of 0.08%, and 30g of allyl polyether with a molecular weight of 350 in a 250ml three-necked flask, stir and heat up to 80°C, and after vacuuming out the water contained in the raw materials, add 5ppm Platinum catalyst isopropanol, heat up to 130°C, after the material turns from turbid to transparent, keep it warm for 3 hours, then remove low boiling point substances under reduced pressure, and cool down naturally to obtain adducts of low hydrogen-containing silicone oil and allyl polyether ...

Embodiment 2

[0034] S1: Take polyether polyols PPG600100g, PPG1000100g, fatty acid is stearic acid 84.2g in a 500ml three-neck flask, gradually warm up to 70 °C until the stearic acid is completely dissolved, add 2.1g p-toluenesulfonic acid as an acidic catalyst, in the kettle Stir and keep the temperature at 130-160°C for 4-8 hours, and remove the reacted water under reduced pressure to obtain the reactant of polyether polyol and fatty acid ester;

[0035] S2: Take 100g of low-hydrogen silicone oil with a hydrogen content of 0.2%, and 30g of allyl polyether with a molecular weight of 350 in a 250ml three-necked flask, stir and heat up to 120°C, and after vacuuming out the water contained in the raw materials, add 20ppm Platinum catalyst isopropanol, heat up to 130°C, after the material turns from turbid to transparent, keep it warm for 3 hours, then remove low boiling point substances under reduced pressure, and cool down naturally to obtain adducts of low hydrogen-containing silicone oil ...

Embodiment 3

[0038] S1: Take 200g of polyether polyol GPE and 57.1g of stearic acid as the fatty acid in a 500ml three-neck flask, gradually raise the temperature to 70°C until the stearic acid is completely dissolved, add 1.43g of p-toluenesulfonic acid as an acidic catalyst, and keep stirring in the kettle React at a temperature of 130-160°C for 4-8 hours, and remove the reacted water under reduced pressure to obtain the reactant of polyether polyol and fatty acid ester compound;

[0039] S2: Take 100g of low-hydrogen silicone oil with a hydrogen content of 0.1%, and 30g of allyl polyether with a molecular weight of 350 in a 250ml three-necked flask, stir and heat up to 100°C, and after vacuuming out the water contained in the raw materials, add 10ppm Platinum catalyst isopropanol, heat up to 130°C, after the material turns from turbid to transparent, keep it warm for 3 hours, then remove low boiling point substances under reduced pressure, and cool down naturally to obtain adducts of low...

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Abstract

A bulk type power plant desulfuration defoamer is provided and is an emulsion formed by substep reactions and mixing. The defoamer includes, by weight, 50-80 parts of an esterification product of polyether polyol and fatty acid, 10-40 parts of an addition product of silicone oil having a low hydrogen content and allyl polyether, 1-5 parts of a higher alcohol, 2-10 parts of an emulsifier, and 5-10parts of isopropyl linoleate. A preparing method of the defoamer is also provided and the method includes S1) preparing the esterification product of polyether polyol and fatty acid through a reaction, S2) preparing the addition product of silicone oil having a low hydrogen content and allyl polyether through a reaction; and S3) mixing the materials to obtain the defoamer. The objective of the invention is to provide the bulk type power plant desulfuration defoamer which is higher in defoaming speed, longer in foam inhibition time and better in effect and the preparing method thereof.

Description

technical field [0001] The invention relates to the technical field of defoamers, in particular to a bulk type power plant desulfurization defoamer and a preparation method thereof. Background technique [0002] Due to historical, policy, technology, resource and other reasons, thermal power generation in my country accounts for more than 60%. Along with environmental protection factors, in order to better the living environment of human beings, the sulfur-containing flue gas caused by coal combustion in thermal power generation needs to be desulfurized. At present, the desulfurization agent mainly used in the desulfurization treatment of power plants is limestone slurry. During the desulfurization process, the slurry in the flue gas absorption tower will be caused by factors such as flue gas dust, oil content in flue gas, insufficient combustion, metal ions in the slurry, and water quality. Foam, foam not only affects the absorption rate of the absorption tower, but also c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04
CPCB01D19/0404B01D19/0409
Inventor 王薛成耿学辉杨帆杨开柱
Owner 湖北新四海化工股份有限公司
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