Furnaces – Refuse incinerator – Rotary drum
Patent
1989-02-15
1989-10-03
Yuen, Henry C.
Furnaces
Refuse incinerator
Rotary drum
110190, 110234, 432105, F23N 502, F27B 738
Patent
active
048709123
ABSTRACT:
An improved method for automatically controlling rate of combustion in a rotary combustor having a rotating combustion barrel (11) by precisely controlling a supply of combustion gas to three separate combustion zones (A, B and C) of the combustion barrel (11) in the rotary combustor used for the incineration of municipal solid waste material (15), the combustion zones (A, B and C) have an associated windbox (34, 37 and 40) disposed directly beneath a respective combustion zone, the windboxes (34, 37 and 40) are further divided into an overfire air zone (36, 39 and 42) and an underfire air zone (35, 38 and 41) forming six air zones which are adjusted by a controller (51) to precisely regulate the supply of combustion gas to each of the six air zones (35, 36, 38, 39, 41, 42). The controller (51) responds to inputs from an oxygen sensor (25) disposed within a flue and a temperature sensing device (31) disposed within the combustion barrel (11) to maintain a percentage of oxygen present in the exhaust gas (21) within a predetermined range, the controller (51) also regulates the rate of rotation of the combustion barrel (11) in order to compensate for the varying nature of the solid waste material (15) to provide clean and efficient combustion.
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Panian Michael G.
Westinghouse Electric Corp.
Yuen Henry C.
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