Fast fluidized bed boiler and a method of controlling such a boi

Details Fast fluidized bed boiler and a method of controlling such a boi Fast fluidized bed boiler and a method of controlling such a boi

1985-07-15

1987-08-18

Favors, Edward G.

Liquid heaters and vaporizers

Miscellaneous

110245, B09B 300

Patent

active

046869395

ABSTRACT:
A completely cooled fast fluidized bed boiler comprises a reactor (4) having a bottom section (3), an integrated primary non-centrifugal mechanical particle separator (5), a gas pass (7) containing convective heat exchangers (10), and means (6,8,9) for controllably recirculating separated particles into the reactor bottom section (3). Reactor (4), separator (5) and gas pass (7) are built as an integrated unit within one and the same cooling system. The boiler is controlled by maintaining the bed temperature substantially constant or within a relatively narrow temperature interval by regulating the recirculation rate dependent on boiler load. For regulating the recirculation rate a non-mechanical valve, preferably a so-called L-valve (8), is used.

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