Title:
流動床リアクターにおける燃料のガス化のための方法および装置
Document Type and Number:
Japanese Patent JP4445261
Kind Code:
B2
Abstract:
The invention relates to a method and apparatus for gasifying fuel in a fluidised bed reactor (1) containing fluidised solid material particles. The fuel (8) is introduced into the reactor bottom part, and product gas (10) formed in gasification is led from the reactor top to a separator, such as a cyclone (11), which separates solid particles from the gas for recirculation to the reactor. In accordance with the invention, a bubbling fluidised bed (2) containing coarser particles, and above this, a circulating bed containing finer particles are maintained in the reactor by recirculating the particles separated from the product gas to the reactor, to the top of the bubbling fluidised bed or above this. The reactor may comprise a lower part (2) for the bubbling fluidised bed and an upper part (4) larger in cross-section for the circulating fluidised bed, the speed of the ascending gas flow in the circulating bed being equal to or lower than that of the bubbling bed. The separating limit in the cyclone may be adjusted such that the discharged product gas flow entrains solid particles, which have a binding effect on tacky ash particles. The product gas is cooled in two successive heat exchangers (19, 20) before filtration of the gas. The method is suitable for gasification of biomasses and recycled fuels forming tars and/or containing chlorine, thus providing a solution to the problems of fouled and clogged gas ducts.
Inventors:
Kirkera, bait
Niminen, Matty
Niminen, Matty
Application Number:
JP2003532613A
Publication Date:
April 07, 2010
Filing Date:
October 01, 2002
Export Citation:
Assignee:
Valsion Technilinen Tutokimus Keskus
International Classes:
C10J3/00; F23C10/02; B09B3/00; C08J11/12; C10J3/46; C10J3/48; C10J3/54; C10J3/56
Domestic Patent References:
| JP63501511A | ||||
| JP63132995A |
Attorney, Agent or Firm:
Takashima Ichi