Gasification reaction device of composite circulating fluidized bed

The utility model provides a gasification reaction device of a composite circulating fluidized bed. The gasification reaction device comprises a reactor body, a multi-stage cyclone separator, a granular fuel feeding system, a powdery fuel feeding system, a center jet gasification burner and a material return system, wherein an outlet of the reactor is connected with a first-stage cyclone separator; the first-stage cyclone separator is connected with a second-stage cyclone separator; coarse particles separated from the first-stage cyclone separator are returned back to a gasifier body through the material return system; and fine particles separated from the second-stage cyclone separator enter the center jet gasification burner through the powdery fuel feeding system, and are finally sprayed into the gasifier body. According to the gasification reaction device, a circulating fluidized bed reactor is adopted as a gasification reaction body; the continuous slag discharge is realized by medium-high temperature gasification; the carbon transformation rate and the cooled coal gas efficiency are improved by high-temperature jet two-stage grading gasification; by the combination of a simplified slag removal device and an air distribution plate design, the operating and running stability is improved; and the gasification reaction device is suitable for gasification transformation of various kinds of carbon solid fuel.