The Flue-Gas Desulfurization (FGD) process utilizes a set of technologies to remove sulfur dioxide (SO2) from the flue gas emissions of coal-fired power plants. … S02 can be removed from flue gases by a variety of methods. For a typical coal-fired power plant, FGD systems will remove ~95% of the SO2 in the flue gases.
What is FGD plant?
The Flue Gas Desulphurisation (FGD) plant removes Sulphur Dioxide from the flue gas before it is released into the atmosphere and hence reduces our impact on the environment. This technology enables Ratcliffe to use British coal. … The FDG technology removes this from emissions.
What is the function of FGD?
FGD is a set of technologies used to remove sulphur dioxide from exhaust flue gases of fossil fuel power plants, and from the emissions of other sulphur oxide emitting processes. It is a control device that absorbs and react using the alkaline reagent to produce a solid compound.
What is the end product of FGD?
However, when the chemical reaction is pushed further by the introduction of air into the FGD absorber tank, the calcium sulfite reacts to become gypsum. The material is then dewatered and processed; the end product is a consistent, finely divided powder.
Is Eskom currently using FGD?
In 2010, Eskom signed an agreement with the World Bank to install the FGD technology. At the end of December 2019, with the technology still outstanding, the loan agreement was amended for the seventh time. Eskom now says the technology will only be fitted by 2030.
Why is FGD required?
FGD is a system which reduces the SOx in flue gas through chemical treatment and converting the captured SOx into a by-product such as Gypsum or Calcium Sulphate or Sulphuric Acid depending upon the type of mechanism used. Dry scrubbing.
How is SO2 removed from flue?
The FDG or SO2 scrubbing process typically uses a calcium or sodium based alkaline reagent. The reagent is injected in the flue gas in a spray tower or directly into the duct. The SO2 is absorbed, neutralized and/or oxidized by the alkaline reagent into a solid compound, either calcium or sodium sulfate.
How is SO2 removed?
In flue gas cleaning processes, SO2 is usually removed by absorption with lime (CaOH2·2H2O) or other compounds having high alkalinity. … SO2 is therefore removed from the atmosphere either unchanged or in the form of sulphuric acid and sulphates.
What is dry FGD?
The Ducon Dry FGD (Dry Sorbent Injection) is used to remove Sulfur dioxide, hydrogen chloride, and other toxic components from flue gases by injecting dry lime, trona, or soda ash ahead of a ESP or baghouse. This is a low cost alterantive for applications that do not have high removal efficiency requirements.
What is FGD in qualitative research?
A Focus Group Discussion (FGD) is a qualitative research method and data collection technique in which a selected group of people discusses a given topic or issue in-depth, facilitated by a professional, external moderator.