Ebara Corporation

Katsutoshi Naruse

Norihisa Miyoshi

Shuichi Nagato

Seiichiro Toyoda

Shugo Hosoda

Nobutaka Kashima

Hiroshi Hashimoto

Katsuyuki Aoki

Shinji Sekikawa

Yasuhiro Sawada

Takahiro Oshita

Tatsuya Hasegawa

Koh Sasaki

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

A supplying apparatus supplies a combustible material capable of enhancing the sealing effects of a supplying system for supplying a combustible material, such as combustible wastes, to a fluidized-bed chamber, stably supplies a combustible material having an undefined shape, and reduces cost for installation. A facility is also provided for gasifying a combustible material using the supplying apparatus for supplying a combustible material, and a method of gasifying combustible materials is also provided. The supplying apparatus supplies a combustible material onto the fluidized bed of a fluidized-bed gasifier chamber or a fluidized-bed combustion chamber. A screw conveyor is inclined, with transportation of the combustible material directed upward, at an angle of 20 degrees or more and 80 degrees or less with respect to a horizontal plane, causing a bed material to flow into a conveyor casing of the screw conveyor.

Supplying apparatus for supplying combustible material, a gasification apparatus for gasifying combustible material and method for gasifying combustible material

Growing community of inventors

Tokyo, Japan

Katsutoshi Naruse