Combined fluidized bed and pulverized coal combustion method

Details Combined fluidized bed and pulverized coal combustion method Combined fluidized bed and pulverized coal combustion method

2006-02-28

2006-02-28

Rinehart, Kenneth (Department: 3749)

Furnaces

Refuse incinerator

Refuse suspended in or supported by a fluid medium

C110S347000

Reexamination Certificate

active

07004089

ABSTRACT:
The invention relates to a combined fluidized bed and pulverized coal combustion method and system. In the method, fluidizing air (4) is injected into a fluidized bed (2) situated in the bottom portion of the combustion chamber (3). Into the combustion chamber, to above the fluidized bed (2), is fed a mixture of pulverized coal and a carrier gas from a second set of fuel feed means (6) at a mass flow rate which is higher or at least substantially equal to the upper ignition limit of the mixture, and the mixture of the pulverized coal and the carrier gas at least by the fluidizing air (4), and at least a fraction of the fuel fed via the second set of fuel feed means (6) is combusted above the fluidized bed (2).

REFERENCES:
patent: 4421036 (1983-12-01), Brannstrom et al.
patent: 4993332 (1991-02-01), Boross et al.
patent: 5190451 (1993-03-01), Goldbach
patent: 5396849 (1995-03-01), Boyd
patent: 44 09 057 (1995-09-01), None
patent: 2 192 141 (1988-01-01), None
patent: WO 97/39280 (1997-10-01), None

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