Ebara Corporation

Nobutaka Kashima

Shuichi Nagato

Norihisa Miyoshi

Seiichiro Toyoda

Shugo Hosoda

Katsutoshi Naruse

Hiroshi Hashimoto

Katsuyuki Aoki

Shinji Sekikawa

Takahiro Oshita

The present invention provides a fuel gasification furnace including a gasification chamber () for fluidizing a high-temperature fluidizing medium therein to form a gasification chamber fluidized bed having an interface, and for gasifying a fuel in the gasification chamber fluidized bed, a char combustion chamber () for fluidizing a high-temperature fluidizing medium therein to form a char combustion chamber fluidized bed having an interface, and for combusting char generated by gasification in the gasification chamber () in the char combustion chamber fluidized bed to heat the fluidizing medium, and a first energy recovery device () for using gases generated by the gasification chamber () as a fuel. The gasification chamber () and the char combustion chamber () are integrated with each other. The gasification chamber () and the char combustion chamber () are divided from each other by a first partition wall () for preventing gases from flowing therebetween, and which extends vertically upward from the interfaces of the respective fluidized beds. The first partition wall () has a first opening () provided in a lower portion thereof, and the first opening () serves as a communication between the gasification chamber () and the char combustion chamber (), for allowing the fluidizing medium heated in the char combustion chamber () to move from the char combustion chamber () via the first opening () into the gasification chamber ().

Fuel gasification system

A gasification furnace and a combustion furnace are integrated with each other to form a single fluidized-bed gasification and combustion furnace in which unburned char generated in the gasification furnace is combusted in the combustion furnace, and the thus generated heat of combustion is utilized as a heat source for gasification. The fluidized-bed gasification and combustion furnace () comprises a gasification furnace () and a combustion furnace () which are divided by a first partition wall (). In the gasification furnace (), a revolving flow of the fluidized medium is formed by diffusion devices () provided on furnace bottoms, and an upward flow of the fluidized medium partly flows in the combustion furnace (). The combustion furnace () is divided into a main partition wall (). In the main combustion chamber (), a revolving flow of the fluidized medium is formed by diffusion devices () provided on furnace bottoms, and an upward flow of the fluidized medium partly flows in the heat recovery chamber ().

Fluidized-bed gasification and combustion furnace

Growing community of inventors

Tokyo, Japan

Nobutaka Kashima