This utility model relates to the field of gasification technology for
municipal solid waste that has undergone shallow
carbonization and crushing, and particularly to a circulating
fluidized bed gasification device. The device includes a
pyrolysis gasification unit, a high-temperature gasification chamber, and a
cyclone separator. The bottom of the
pyrolysis gasification unit has a first gasifying agent inlet, and the side wall has a
coarse particle material inlet and a second gasifying agent inlet. The upper part of the high-temperature gasification chamber is connected to the
pyrolysis gasification unit to feed the first volatile matter generated by the pyrolysis of coarse particles in the pyrolysis gasification unit into the high-temperature gasification chamber. The bottom of the high-temperature gasification chamber has a first gasifying agent inlet and a second gasifying agent inlet, and the side wall has a fine
particle material inlet. The upper part of the high-temperature gasification chamber is connected to the upper part of the
cyclone separator to feed the second volatile matter generated by gasification in the high-temperature gasification chamber into the
cyclone separator. The gasification device provided by this utility model can effectively reduce
tar content, reduce
fly ash content, maintain stable operation, and improve gasification intensity and
syngas quality.