Heating – Tumbler-type rotary - drum furnace
Patent
1988-04-22
1989-05-23
Yuen, Henry C.
Heating
Tumbler-type rotary - drum furnace
432 58, 432105, 431 1, F27B 1500
Patent
active
048325988
ABSTRACT:
A pulse combustion dehydration apparatus includes a pulse combustor designed to operate with a low pressure fuel gas supply and having valve means to stop the supply of gas to the combustion chamber during high pressure portions of the pulse combustion cycle. Gas enters the combustion chamber through a fuel distributor having a series of radial gas outlets downstream of an annular flame trap through which combustion air is admitted to the combustion chamber from an air cushion chamber. These features increase the amplitude of the combustion cycle and reduce the amount of residual flame in the combustion chamber, resulting in a strong cycle. An air bypass pipe from the air cushion chamber to the exhaust pipe apparently increases the compression in the combustion chamber from the returning pressure waves. The deydration apparatus further includes a rotary drum into which material is to be dehydrated is delivered in the exhaust gas stream from the exhaust pipe of the pulse combustor. Material collected at the inlet end of the drum is delivered through a vertical lift pipe into a cyclone separator.
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John A. Kitchen Ltd.
Yuen Henry C.
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