Flue gas denitration method and device by storing and reducing nitrogen oxides in circulating fluid bed

Abstract

The invention discloses a denitration method of the gas stored and reduced by nitrogen oxides of a circulation fluidized bed, which comprises the following steps: a. after being accelerated or pressured, the gas is directly sprayed into a storage reactor of the fluidized bed which uses a catalyst as a bed material to realize the oxidation, absorption and storage of NOx simultaneously when drivingthe bed material to flow; b. a gas-solid separator which is arranged at the tail of the storage reactor is used for realizing the separation of the gas from the solid; the gas phase can be directly discharged or can enter a later NOx purification system to be purified; and a solid catalyst enters a reduction and regeneration reactor of the fluidized bed; c. the catalyst storing NOx contacts with a reducing agent in the reduction and regeneration reactor of the fluidized bed to reduce the stored NOx and realize the regeneration of the catalyst; and d. the regenerated catalyst is introduced into the storage reactor of the fluidized bed. The denitration method is suitable for the gas denitration of a large flow, has high denitrification efficiency, low energy consumption, simple device structure and small occupied area, is easy to connect with the desulphurization device of the circulation fluidized bed for use, and has strong gas denitration adaptability

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ORCID for Zheng Jiang: orcid.org/0000-0002-7972-6175

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