F - Mech Eng,Light,Heat,Weapons – 27 – B
Patent
F - Mech Eng,Light,Heat,Weapons
27
B
110/2.1
F27B 15/10 (2006.01)
Patent
CA 1123676
ABSTRACT OF THE DISCLOSURE A fluid-bed furnace has at least one combustion chamber, preferably two side-by-side, housing a bed of incombustible particulate material to be fluidised when burning fuel fed thereto. Bed fluidisation is by forced release in the incombustible material of combustion promoting gas, normally air, from a plenum chamber arrangement externally of the bed proper at a side or end thereof to save overall height. Other features include the return of used exhaust gas to the bed for additional fluidising and heating purposes; release within the bed of such returned exhaust gas at a position higher than normal conbustion promoting gas; an auxiliary burner within the combustion chamber to consume fine fuel material lifted from the bed in operation; insulation of at least the normal combustion promoting gas plenum chamber externally by incombustible bed material and/or internally by refractory lining; end tapering of bed traversing gas feed pipes to reduce expansion resistance; and a removable end plug in the latter pipes to ease cleaning thereof.
325811
Fetherstonhaugh & Co.
Worsley (g.p.) & Company Limited
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