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Antifoams for power plant Flue Gas Desulfurization (FGD) are specialized agents—typically polyether or silicone-based—designed to suppress foam in high-chloride, high-solid limestone-gypsum slurries. They enhance system efficiency by preventing slurry overflow, reducing circulating pump losses, and managing stable oxidation zones.
Commonly Used Antifoam Types
- Polyether-Modified Silicone Defoamers: These are highly effective for FGD systems, offering strong acid/alkali resistance and excellent stability in harsh chemical environments.
- Polyether-Based Defoamers: These are used to specifically target foam generated in the limestone slurry absorption tower, providing quick suppression of existing foam and long-term inhibition.
- Specialized Mineral Oil/Organic Compounds: Some formulations are tailored for high-temperature and high-solid content slurries.
Key Benefits
- Increased System Efficiency: Eliminates foam-related operational issues, such as false high-liquid levels and slurry buildup at the absorber inlet.
- Cost Reduction: Prevents the loss of raw materials and reduces the frequency of maintenance shutdowns, lowering operational costs.
- Environmental Protection: Assists in ensuring that wastewater from desulfurization meets discharge standards, mitigating the impact of chemical discharges.
- Improved Oxidation: Stabilizes the slurry oxidation zone.
Selection Factors
When selecting an antifoam for FGD, key considerations include the ability to handle high chlorine and fluorine ions, high solid content, and the high pH (or low, depending on the stage) of the slurry.
When selecting an antifoam for FGD, key considerations include the ability to handle high chlorine and fluorine ions, high solid content, and the high pH (or low, depending on the stage) of the slurry.
- For High Chloride/Solid Content: The antifoam must maintain its integrity under severe conditions, such as high chloride concentrations which can hinder conventional foam control methods.
- Rapid Defoaming: The ability to instantly break existing foam is critical to avoid immediate overflow.
- Long-Term Inhibition: The ability to prevent foam from reforming over a long period.
Common brands or types frequently cited include polyether compound defoamers for industrial flue gas desulfurization (e.g., specialized formulations from providers like NBInno or similar industrial suppliers).
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Web results
Essential Solution for Foaming in Absorption Towers
ywlchemical.com
https://ywlchemical.com › antifoam-in-desulfurization
ywlchemical.com
https://ywlchemical.com › antifoam-in-desulfurization
Jan 19, 2026 — INVINO offers specialized antifoam solutions designed to combat foaming in absorber columns and support efficient desulfurization.Read more
Why do power plants use desulfurization defoamer?
Shenyang Rise Surface Technologies Co., Ltd.
https://www.risechemical.com › news › why-do-power-p...
Shenyang Rise Surface Technologies Co., Ltd.
https://www.risechemical.com › news › why-do-power-p...
Jul 6, 2024 — Why do power plants use desulfurization defoamer? Why do ... Desulfur antifoam can achieve rapid defoaming and long-term foam suppression.Read more
Defoamer For Desulfurization Industry,Antifoam Supplier
Nanjing Antifoam Environmental Technology Co., Ltd
https://www.antifoamchemical.com › desulfurization-ind...
Nanjing Antifoam Environmental Technology Co., Ltd
https://www.antifoamchemical.com › desulfurization-ind...
the special defoamer for desulfurization has good chemical stability and heat resistance.
Foaming in wet flue gas desulfurization plants: Laboratory ...
Wiley
https://aiche.onlinelibrary.wiley.com › doi › aic
Wiley
https://aiche.onlinelibrary.wiley.com › doi › aic
May 9, 2013 — Vegetable oil is often used as an antifoaming agent in Danish full-scale wet FGD plants, but in this work it only proved efficient for a weak ...Read more
Desulfurization defoamers, antifoaming solutions for power ...
Yantai Thinking Finechem Technology Co., Ltd.
http://www.thichemical.com › xiaopaoji
Yantai Thinking Finechem Technology Co., Ltd.
http://www.thichemical.com › xiaopaoji
These defoamers can quickly eliminate and suppress foam in the desulfurization tower, control the liquid level, eliminate the false high liquid level caused by ...Read more
What is the role of desulfurization foam suppressants ...
知乎
https://www.zhihu.com › answer
知乎
https://www.zhihu.com › answer
They effectively control foam levels, prevent foam-induced false high liquid levels, and reduce the risk of slurry overflow. They also help to mitigate the ...Read more
anti foam agent for building material manufacturing
xiamen rickman chemical technology co., ltd
https://www.rickmanchemical.com › blog › anti-foam-ag...
xiamen rickman chemical technology co., ltd
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Jul 29, 2024 — A metalworking fluid defoamer is a special additive used to inhibit foam generation during metalworking processes. It is commonly added to ...Read more
Antifoaming agent for flue gas desulphurization system and ...
Google Patents
https://patents.google.com › patent
Google Patents
https://patents.google.com › patent
The antifoaming agent is suitable for a thermal-power-plant limestone-gypsum wet flue gas desulfurization system adapting to high chlorine, fluorion and solid- ...Read more
Understanding the Role of Desulfurization Defoamer in ...
Shenyang Rise Surface Technologies Co., Ltd.
https://www.risechemical.com › news › understanding-th...
Shenyang Rise Surface Technologies Co., Ltd.
https://www.risechemical.com › news › understanding-th...
Jul 27, 2023 — Desulfurization defoamer prevent foam from accumulating on the surfaces of equipment, minimizing the risk of corrosion, scaling, and subsequent ...Read more
High-Performance Defoamer for Efficient Flue Gas ...
NINGBO INNO PHARMCHEM CO.,LTD.
https://www.nbinno.com › water-treatment-agents › poly...
NINGBO INNO PHARMCHEM CO.,LTD.
https://www.nbinno.com › water-treatment-agents › poly...
This article details a specialized polyether compound defoamer designed for flue gas desulfurization (FGD) in thermal power plants.
People also ask
What are the disadvantages of Antifoaming agents?
Disadvantages of Silicone Based Defoamers
Silicone-based antifoam is relatively poor durability. Silicone is oil soluble, and it reduces the defoaming effects in oil systems. It is not ideal for long-term high-temperature resistance and strong alkali resistance.Jan 20, 2022
Silicone-based antifoam is relatively poor durability. Silicone is oil soluble, and it reduces the defoaming effects in oil systems. It is not ideal for long-term high-temperature resistance and strong alkali resistance.Jan 20, 2022
Advantages and Disadvantages of Silicone Defoamers- NAQ Global
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https://naqglobal.home.blog › 2022/01/20 › silicone-def...
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What removes SO2 from flue gases?
Scrubbers
Flue Gas Desulfurization Systems: Scrubbers
Flue gas desulfurization systems (FGD) or scrubbers are devices capable of sulfur removal efficiencies between 50% to 98%. Typically the highest removal is achieved by wet scrubbers and the lowest by dry scrubbers.Nov 15, 2023
Flue gas desulfurization systems (FGD) or scrubbers are devices capable of sulfur removal efficiencies between 50% to 98%. Typically the highest removal is achieved by wet scrubbers and the lowest by dry scrubbers.Nov 15, 2023
Reduce The Amounts of Sulfur Dioxide From Flue Gases
Chart Industries
https://www.chartindustries.com › Articles › Reduce-The...
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What can be used as a defoaming agent?
Commonly used agents are insoluble oils, polydimethylsiloxanes and other silicones, certain alcohols, stearates and glycols. The additive is used to prevent formation of foam or is added to break a foam already formed.
Defoamer - Wikipedia
Wikipedia
https://en.wikipedia.org › wiki › Defoamer
Wikipedia
https://en.wikipedia.org › wiki › Defoamer
How to prevent foaming in a distillation column?
- **Use Antifoaming Agents:** Introducing antifoam additives can help mitigate foaming in the column. - **Optimize Operating Conditions:** Adjusting temperature, pressure, and flow rates can reduce foaming potential.Jul 25, 2025
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PatSnap Eureka
https://eureka.patsnap.com › article › distillation-column-...
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