Title:
METHOD AND EQUIPMENT FOR GASIFICATION AND BURNING OF SOLID WASTE
Document Type and Number:
WIPO Patent Application WO/1998/023898
Kind Code:
A1
Abstract:
A method and equipment for gasification and burning of solid waste in which the solid waste is subjected to thermal decomposition and gasification at 450�-650 �C in a fluidized bed of a fluidized bed gasification furnace, the resultant waste being subjected to melt combustion at 1200�-1500 �C in a melt combustion furnace in a subsequent stage, whereby the ash is turned into fused slag. At least one of oxygen, vapor and air is selected as a gas supplied to the fluidized bed in the fluidized bed gasification furnace. The quantity of oxygen in the gas supplied to the fluidized bed is set to 10-30 % of a quantity of theoretical combustion oxygen. The following whirling movements of a fluidized medium are generated. The fluidized medium flows down as it is fluidized in a slow fluidized bed in a central portion of a furnace bottom, flows up as it is fluidized in an active fluidized bed in a peripheral portion of the furnace bottom, flows from a central portion to a peripheral portion in a lower portion of the fluidized bed and from a peripheral portion to a central portion in an upper portion of the fluidized bed as the fluidized medium is fluidized, and flows from a central portion to a peripheral portion in the lower portion of the fluidized bed as the fluidized medium is fluidized. The melt combustion furnace is of a whirling flow type.
Inventors:
FUJINAMI SHOSAKU (JP)
TAKANO KAZUO (JP)
IRIE MASAAKI (JP)
HIROSE TETSUHISA (JP)
OSHITA TAKAHIRO (JP)
MAKINO YASUO (JP)
TAKANO KAZUO (JP)
IRIE MASAAKI (JP)
HIROSE TETSUHISA (JP)
OSHITA TAKAHIRO (JP)
MAKINO YASUO (JP)
Application Number:
PCT/JP1997/004314
Publication Date:
June 04, 1998
Filing Date:
November 26, 1997
Export Citation:
Assignee:
EBARA CORP (JP)
FUJINAMI SHOSAKU (JP)
TAKANO KAZUO (JP)
IRIE MASAAKI (JP)
HIROSE TETSUHISA (JP)
OSHITA TAKAHIRO (JP)
MAKINO YASUO (JP)
FUJINAMI SHOSAKU (JP)
TAKANO KAZUO (JP)
IRIE MASAAKI (JP)
HIROSE TETSUHISA (JP)
OSHITA TAKAHIRO (JP)
MAKINO YASUO (JP)
International Classes:
F23L7/00; C10J3/54; C10J3/66; F23G5/00; F23G5/027; F23G5/16; F23G5/30; F23J1/00; (IPC1-7): F23G5/30; F23G5/027
Foreign References:
| JPH07332614A | 1995-12-22 | |||
| JPH0587314A | 1993-04-06 | |||
| JPH05223226A | 1993-08-31 |
Attorney, Agent or Firm:
Shamoto, Ichio (Section 206 New Ohtemachi Building, 2-1,
Ohtemachi 2-chom, Chiyoda-ku Tokyo 100, JP)
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