Furnaces – Process – Supplying fluid
Patent
1995-10-03
1998-11-10
Bennett, Henry A.
Furnaces
Process
Supplying fluid
110245, 110190, 432 58, 16510416, 34363, 34370, F23L 100
Patent
active
058328483
ABSTRACT:
A fluidized bed heat treatment apparatus is provided to be heated by combusting fuel gas in a manner to minimize or prevent the exhaust of carbon monoxide, the apparatus including a retort containing refractory particles to be fluidized, a first inlet in a lower region of the retort for introducing fuel/air mixture into the retort, a second inlet in a lower region of the retort for introducing secondary air into the retort, a temperature sensor located above the first and second inlets, a flame initiator located above the refractory particles, an externally located mixer to mix fuel and air in desired proportions and to supply same to the first inlet, and a control device arranged to control said externally located mixer in response to temperatures sensed by said temperature sensor whereby when the temperature sensor is below a predetermined temperature indicative of the bed being substantially not fluidized, a stoichiometric fuel/air mixture is supplied to the first inlet and when the temperature sensor senses a temperature above the predetermined level indicative of the bed being substantially fluidized, a less than stoichiometric fuel/air mixture is supplied to the first inlet with secondary air being supplied through said second inlet.
REFERENCES:
patent: 4013279 (1977-03-01), Virr
patent: 4340433 (1982-07-01), Harding
patent: 4392814 (1983-07-01), Harding
patent: 4752061 (1988-06-01), Dalton et al.
patent: 5189813 (1993-03-01), Heath et al.
Fitchett Andrew Simpson
Reynoldson Ray William
Bennett Henry A.
Quality Heat Treatment Pty, Ltd.
Tinker Susanne C.
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