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Title:
FLUIDIZED BED DRYING DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/128151
Kind Code:
A1
Abstract:
A fluidized bed drying device is provided with: a drying container (101) that forms a hollow shape; a raw coal introduction port (102) at one end of the drying container (101) through which raw coal is introduced; a dried coal discharge port (103) that discharges from the other end of the drying container (101) the dried coal that results when the raw coal is heated and dried; a fluidizing gas supply port (104) that supplies a fluidizing gas to the lower part of the drying container (101) to form, together with the raw coal, a fluidized bed (S); a gas discharge port (105) that discharges the fluidizing gas and generated steam from a location higher than the raw coal introduction port (102) at one end of the drying container (101); and a heat transfer pipe (106) that heats the raw coal in the fluidized bed (S). A control device (125) adjusts the degree of opening of a flow volume adjustment valve (114) of a gas discharge line (113) on the basis of the temperature of the fluidized bed (S) as detected by a first temperature sensor (121), and thus changes the dew-point temperature by changing the pressure inside the drying container (101), which enables improved drying efficiency.

Inventors:
OHURA KOJI
Application Number:
PCT/JP2012/056579
Publication Date:
September 27, 2012
Filing Date:
March 14, 2012
Export Citation:
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Assignee:
MITSUBISHI HEAVY IND LTD (JP)
OHURA KOJI
International Classes:
F26B3/084; F26B5/04
Domestic Patent References:
WO2006044264A22006-04-27
Foreign References:
JP2008128524A2008-06-05
JP2000126687A2000-05-09
JPH02197791A1990-08-06
Attorney, Agent or Firm:
SAKAI, Hiroaki et al. (JP)
Hiroaki Sakai (JP)
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Claims: