Distillation process control for maximum recovery using minimum energy
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United States of America Patent
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Jan 5, 1988
Issued Date -
N/A
app pub date -
Jan 28, 1987
filing date -
Dec 23, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved distillation process and apparatus are provided whereby liquid product recovery other than bottom product is maximized and feed stream heating is minimized. Inert gas streams combined with the feed stream and introduced into the distillation tower are controlled whereby feed stream heater residence time and partial pressures of feed stream components are minimized. The temperature of the combined inert gas-feed stream exiting the feed stream heater is controlled at a minimum temperature by establishing signals representative of overflash, bottom product specification and other conditions and comparing such signals whereby the signal which represents the lowest heater outlet temperature is utilized for controlling the heater operation.
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