Method and apparatus for operating a circulating fluidized bed r

Liquid heaters and vaporizers – Miscellaneous

Patent

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110245, 16510416, B09B 300

Patent

active

054069149

ABSTRACT:
A circulating fluidized bed (CFB) system, and a method of operation thereof, provide a heat transfer zone containing primarily clean fluidizing gas providing advantageous conditions for superheating, while providing a large enough flow of solid material in the heat exchange chamber during both high and low load conditions to achieve the desired heat transfer capacity. The heat exchange chamber is provided near the bottom of a return duct connected between the particle separator and combustion chamber of the CFB, with a common wall separating the combustion and heat exchange chambers. Particles are reintroduced into the combustion chamber through a solid particle inlet (plurality of narrow, substantially horizontal, elongated, vertically stacked slots) in the common wall, and particles may pass directly from the combustion chamber into the heat exchange chamber through a passage in the common wall above the solid particle inlet. A gas inlet may also be provided in the common wall, above the passage, to allow fluidizing gas from the heat exchange chamber to flow into the combustion chamber.

REFERENCES:
patent: 4457289 (1984-07-01), Korenberg
patent: 4594967 (1986-06-01), Wolowodiuk
patent: 4813479 (1989-03-01), Wahlgren
patent: 5014652 (1991-05-01), Hyldgaard
patent: 5054436 (1991-10-01), Dietz
patent: 5060599 (1991-10-01), Chambert

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