This invention relates to the field of
circulating fluidized bed boiler technology, specifically to an anti-clogging structure for the return feed port of a
circulating fluidized bed boiler. This structure employs a high-pressure fluidizing air duct embedded in the return feed channel of the
circulating fluidized bed boiler, with the port of the embedded section directly opposite the return feed port area where the return feed channel connects to the furnace of the circulating
fluidized bed boiler. A high-pressure fluidizing air source is connected to one end of the high-pressure fluidizing air duct, providing fluidizing air that is blown from the port of the embedded section towards the return feed port area, preventing ash and coking in the return feed port area. By embedding a high-pressure fluidizing air duct at the end of the return feed channel, this invention effectively prevents abrupt changes in
material flow characteristics and thermal imbalance at the return feed port during load variations, thus preventing the formation of a
coke layer on the inner wall and ultimately causing blockage, which is beneficial for ensuring the normal operation of the boiler.