Flue Gas Desulfurization Project In Jiangsu

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FGD system

Application: boiler flue gas treatment

Capacity: gas volume of the system is 40,000 m3/h, and the temperature is 40℃.

Transformation technology: “cooling water spray condensation”+”REGLASS condensation phase change condensation” technology

We supply flue gas desulfurization(FGD system) unit to client from Jiangsu, which is used in Tongda Cogeneration project, it is a 1×75t/h high temperature and high pressure circulating fluidized bed boiler +1×CB6MW heating unit using limestone-calcium method for flue gas desulfurization. Before upgrading, the exhaust temperature is low, the flue gas at the desulfurization outlet is saturated, and the dense “white smoke” is formed at the flue gas outlet.

This project includes system design, equipment supply, civil construction, on-site installation and commissioning of the entire plume control EPC project. The duration of the desulfurization wet smoke plume comprehensive treatment project is about 90 days. This renovation project adopts the technology of “cooling water spray condensation + REGLASS wet smoke plume condensation phase change condensation”.

Technical features and advantages

  • Water saving and emission reduction: During the operation of the desulfurization flue gas treatment system, the flue gas will produce 2~5t/h condensate water, which can greatly reduce the pollutants such as salt, particulate matter and acid gas carried by the flue gas emission, and the flue gas condensate will directly enter the circulating cooling water system
  • Economic benefits: Taking power consumption as an example, the system saves 970,000 yuan/year compared with condensation method. Taking carbon emissions as an example, the system can reduce carbon for the owner by 1102 tons/year compared to the condensation method
  • White smoke elimination: the annual white smoke elimination rate of more than 90%.
Flue gas desulfurization project

About FGD

Flue gas desulfurization refers to the removal of sulfur oxides (SO2 and SO3) from flue gas or other industrial waste gases.

Flue gas desulfurization (Flue gas desulfurization, referred to as FGD), in FGD technology, according to the type of desulfurizer, it can be divided into the following five methods: Calcium method based on CaCO3 (limestone), magnesium method based on MgO, sodium method based on Na2SO3, ammonia method based on NH3, organic alkali method based on organic base.

Chemical principle: SO2 in the flue gas is essentially acidic and can be removed from the flue gas by reacting with appropriate alkaline substances. The most commonly used alkaline substances for flue gas desulfurization are limestone (calcium carbonate, CaCO3), quicklime (calcium oxide, CaO) and hydrated lime (calcium hydroxide,Ca(OH)2). Limestone is abundant and therefore relatively cheap, and both quicklime and hydrated lime are made from limestone by heating it. Other alkaline substances such as sodium carbonate (soda ash), magnesium carbonate and ammonia are sometimes used. The alkaline substance used reacts with SO2 in the flue gas to produce a mixture of sulfites and sulfates (depending on the alkaline substance used, these salts may be calcium salts, sodium salts, magnesium salts, or ammonium salts). The ratio between sulfites and sulfates depends on process conditions, and in some processes all sulfites are converted to sulfates. The reaction between SO2 and an alkaline substance occurs either in an alkali solution (wet flue gas desulfurization) or on a wet surface of a solid alkaline substance (dry or semi-dry flue gas desulfurization).

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