Monday, 19 August 2019

Role of Gypsum storage in FGD/Flue gas desulphurization unit


Gypsum is a mineral found in sedimentary rock formations in a crystalline form known as calcium sulphate dehydrate CuSo4.2H2O. Gypsum Storage at large scale is needed since it is one of the prime raw material in the cement industry and in power plants for FGD plants. In purpose to improve cement’s inherit qualities, performance and efficiency, a composite gypsum storage solution need to be followed systematically:


Gypsum Handling 


Gypsum handling includes bunkering of gypsum, along with its stacking and reclaiming in a very cautious way. A gypsum handling system adds flexibility and automation to a processing facility helping to ensure that gypsum moves efficiently from one stop to the next and even to a storage and transport. As an aggregate, gypsum can be a difficult material to handle, requiring a system that is robust and able to with stand a rigorous workload. Gypsum is usually stored under well constructed sheds ensuring its storage without deterioration and without exposure  to moisture and heat, and away from the direct sun.

For environmentally friendly gypsum storage and production of a best outcome in cement industry, today almost all out-performing cement plants use to store gypsum stockpiles under a strong, durable, eco-friendly and solution-rich gypsum storage sheds and gypsum storage. 


Role of gypsum storage system in FGD/ Flue gas desulphurization Unit:

The resources like coal, petcoke contain a significant amount of sulphur into them. In many large scale power plants and cement plant (where the raw material is Coal, petcoke etc), the problems arises from boiler or furnace where large volumes of So2 accumulation not only deteriorates air quality of environment but also highly corrosive for handling equipments like stackers, fans etc.
In order to extract So2 from flue gas, the mechanism of extraction employed is known as FGD or Flue Gas Desulphurization. In Flue Gas Desulphurization, the chemical Techniques are used to exclude sulphur di-oxide (So2) in exhausted flue gasses from the Furnace/boiler. Some of the Chemical techniques used for FGD are ‘Wet Scrubing’, ‘Dry Scrubing’, ‘SNOX FGD’ etc.
The output from flue gas desulphurization is synthetic gypsum, which is carried out under FGDSHEDS. For cement manufacturing, this FGD storage product or synthetic gypsum is supplied in crushed form for further fine grinding with cement clinker and has many other commercial applications in cement industry, bricks manufacturing etc.




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