Furnaces – Process – Treating fuel constituent or combustion product
Patent
1996-10-03
1999-11-23
Kim, Ted
Furnaces
Process
Treating fuel constituent or combustion product
110216, 110229, 110245, F23R 700, F23G 500
Patent
active
059880805
ABSTRACT:
In an improved system for recovering heat from a combustion gas produced by burning wastes, the combustion gas or combustible gas produced by partial burning of the wastes subjected to dust filtration in a temperature range of 450-650.degree. C. at a filtration velocity of 1-5 cm/sec under a pressure of from -5 kPa (gage) to 5 MPa before heat recovery is effected. The dust filtration is preferably performed using a filter medium which may or may not support a denitration catalyst. Heat recovery is preferably effected using a steam superheater. The dust-free gas may partly or wholly be reburnt with or without an auxiliary fuel to a sufficiently high temperature to permit heat recovery. The combustion furnace may be a gasifying furnace which, in turn, may be combined with a melting furnace. If desired, the reburning to a higher temperature may be performed under pressure and the obtained hot combustion gas is supplied to a gas turbine to generate electricity, followed by introduction of the exhaust gas from the gas turbine into a steam superheater for further heat recovery. The system can raise the temperature of superheated steam to a sufficient level to enhance the efficiency of power generation without possibility of corrosion of heat transfer pipes by the combustion gas or combustible gas.
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Fujinami Shosaku
Hirose Tetsuhisa
Irie Masaaki
Miyoshi Norihisa
Oshita Takahiro
Ebara Corporation
Kim Ted
LandOfFree
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