Furnaces – With exhaust gas treatment means – Means separating particles from exhaust gas
Patent
1987-02-20
1988-03-15
Favors, Edward G.
Furnaces
With exhaust gas treatment means
Means separating particles from exhaust gas
60 395, 122 4D, F23J 300
Patent
active
047305630
ABSTRACT:
A power plant with combustion of a fuel in a fluidized bed (14) enclosed within a combustion chamber in a bed vessel (11). A gas outlet from the bed vessel (11) is formed as a centrifugal separator (20) intended to primarily separate coarse material containing unburnt fuel leaving the bed (11) together with the combustion gases. Suitably the separator (20) extends into the bed vessel (11) and separated material is returned to the bed (14) through a return conduit (34), which is preferably located close to the bed vessel wall. This conduit (34) opens into the bed vessel (11), near the bottom (12) thereof. For the return transport an ejector (35) may be used to overcome the pressure difference existing between the separator (20) and the orifice of the conveying conduit (34). The propellent gas may consist of combustion air from the space (16). If the pressure difference between the space (16) and the orifice of the return tube (34) is insufficient to obtain the necessary driving power, a booster compressor (36) may be used to increase the pressure of the propellent gas.
REFERENCES:
patent: 4584949 (1986-04-01), Brannstrom
patent: 4590868 (1986-05-01), Ishihara
patent: 4600414 (1986-07-01), Metcalfe et al.
patent: 4669395 (1987-06-01), Brannstrom
patent: 4679511 (1987-07-01), Holmes et al.
ASEA STAL Aktiebolag
Favors Edward G.
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