Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition – Control element responds proportionally to a variable signal...
Patent
1998-06-29
2000-12-26
Tran, Hien
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
Control element responds proportionally to a variable signal...
422110, 422131, 422138, 422139, 422146, 526920, G05D 2300, G05D 700, B01J 818
Patent
active
061654183
ABSTRACT:
A system for controlling temperature of a polymerization process includes a primary reactor system having a polymerization reactor and a recycle gas line which includes a heat exchanger, a primary temperature controller which continuously measures temperature within the reactor and provides a coolant adjust signal, a secondary cooling system which circulates a mixture of fresh and recirculated coolant through the heat exchanger and a secondary temperature controller which continuously measures the temperature of the mixed coolant and adjusts the proportion of mixed coolant to fresh coolant based on the coolant adjust signal and the temperature of the mixed coolant.
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D.E. Seborg, T.F. Edgar, and D.A. Mellinchamp, Process Dynamics and Control, pp. 183-196 and 676-677, Wiley, 1989.
B.G. Liptak, Editor, Instrument Engineer's Handbook: Process Control, pp. 10-11, Chilton Book Co., 1995.
Anderson David H.
Carver Kirk D.
Coon Richard M.
Sandell David J.
Mobil Oil Corporation
Santini Dennis P.
Tran Hien
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