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Introduction
Stainless steel flue gas desulfurization (FGD) unit is a technology that is used to remove sulfur dioxide (SO2) from exhaust flue gases released from the burning of fossil fuels. FGD units are commonly used in the coal-fired power plants. This technology consists of multiple subsystems, components and parts that work together to reduce sulfur emissions from the power plants to meet pollution regulations. This technology is also becoming increasingly used in other types of industries, such as cement and steel production, as well as in chemical plants.
Principle of operation
The principle of operation of the stainless steel Flue Gas Desulfurization (FGD) unit is based on chemical reaction and physical absorption principles. The key purpose of installing the FGD unit is to reduce the sulfur content of flue gases. In terms of the chemical reaction principle, the sulfur dioxide (SO2) present in the flue gas is reacted with a chemical reagent such as calcium hydroxide, calcium oxide or hydrated lime. This helps to form either calcium sulfite or calcium sulfate which is then removed from the flue gas via physical absorption. The physical absorption principle involves using a reagent such as activated carbon or powdered activated carbon. These reagents act as the absorbents and attracts and binds SO2 from the flue gas. This allows for the removal of sulfur from the gas stream.
Solution components
The solution for implementing the stainless steel FGD unit consists of multiple components and subsystems. These components include chemical absorption and physical absorption subsystems, in addition to reagents such as calcium hydroxide, calcium oxide, hydrated lime, activated carbon and powdered activated carbon. The chemical absorption subsystem comprises multiple components such as chemical dosing tanks, wet scrubbers and scrubber crystals. The physical absorption subsystem includes components such as dry scrubbers, dry particulate collectors, dust collectors, and high-efficiency particulate air filters. The reagents act as the key absorber of sulfur in the flue gas, which are then provided to the subsystems. The subsystems help to reduce the sulfur content of the flue gas, while the reagents act as the key component to remove sulfur from the gas.
Benefits
The installation of a stainless steel flue gas desulfurization (FGD) unit provides numerous benefits. Firstly, it helps to reduce air pollution levels and mitigate the impact of pollution on the environment. By reducing the sulfur content of flue gases, it also helps to reduce acid rain. Secondly, it helps to improve air quality by removing harmful pollutants such as SO2 from the air. Thirdly, it helps to reduce the operating costs associated with installing and running a plant by helping reduce energy consumption. Finally, it helps to improve the safety of the plant personnel and surrounding environment.
Conclusion
Stainless steel flue gas desulfurization (FGD) unit is a technology used to remove sulfur dioxide (SO2) from exhaust flue gases released from the burning of fossil fuels. This technology consists of multiple components and subsystems, as well as reagents such as calcium hydroxide, calcium oxide, hydrated lime, activated carbon and powdered activated carbon. These components help to reduce the sulfur content of the flue gases, so that pollution regulations can be met. The installation of the FGD unit also provides numerous benefits such as reducing air pollution levels and operating costs, while also improving air quality and safety.