Power plant with combustion in a fluidized bed

Details Power plant with combustion in a fluidized bed Power plant with combustion in a fluidized bed

1987-10-28

1988-10-25

Favors, Edward G.

Liquid heaters and vaporizers

Plants

Feed water heaters

60655, 122 4D, F23B 3300

Patent

active

047795743

ABSTRACT:
The invention relates to a power plant for combustion of a fuel, for example carbon, in a combustion chamber (2) in a bed (10) of fluidized particulate material, primarily a PFBC power plant. The plant includes a multi-stage steam turbine (13) and an intermediate superheater (12) for superheating steam between the turbine stages. The combustion chamber (2) is divided into a first and a second part (2a, 2b) by a wall (4) having one or more openings (42, 43) which takes up a minor part of the cross-section in the bed region and makes possible a limited exchange of bed material. The first part (2a) includes a nest of boiler tubes (11) for generating steam. The second combustion chamber part (2b) includes a nest of boiler tubes (12) for intermediate superheating of steam between the turbine stages. The combustion chamber parts (2a, 2b) are each connected to a fuel supply system (20, 21, 22 and 23, 24, 25, respectively). The control of the superheating takes place by control means (62) which control the bed temperature in the second combustion chamber part (2b) by controlling the fuel supply to said combustion chamber part (2b).

REFERENCES:
patent: 3863606 (1975-02-01), Bryers et al.
patent: 4116005 (1978-09-01), Willyong
patent: 4449483 (1984-05-01), Strohmeyer
patent: 4476816 (1984-10-01), Cannon et al.
patent: 4655147 (1987-04-01), Brannstrom et al.
patent: 4665864 (1987-05-01), Seshamani et al.

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