Porter, Wright, Morris & Arthur LLP
External bed type double-fluidized bed system for preventing boiler contamination
An external bed type double-fluidized bed system for preventing boiler contamination includes a fluidized bed combustion furnace, a cyclone separator, a coal ash distributor and a fluidized bed pyrolysis furnace. The fluidized bed combustion furnace is connected with the coal ash distributor, the coal ash distributor is connected with the coal ash inlet on a side wall of the fluidized bed combustion furnace through a return feeder with which the coal ash outlet of the fluidized bed pyrolysis furnace is also connected through an external bed, and the return feeder is connected with the fluidized bed combustion furnace. A fuel coal is pyrolyzed in the fluidized bed pyrolysis furnace at a temperature to volatize alkali chlorides into a pyrolysis gas, thereby reducing the content of the alkali chlorides contained in the coal in the fluidized bed combustion furnace and relieving the contamination to a convective heat-absorbing surface.
Dongfang Electric Corporation
F F F F F F F F
F23C F23C F23C F23J F23C F23C F23J F23C
additional inventional inventional inventional inventional inventional inventional inventional
Liyong Qi Hongwei Pan Chunfei Yuan Jiang Xin Zhengning Yang Wei
Cao Du Hu Guo Zhang Zhang Liu Zhang Liu Li Fan