Heat and material balance method of process control for petrochemical plants and oil refineries
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United States of America Patent
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-
Jun 15, 2004
Grant Date -
Dec 6, 2001
app pub date -
Feb 9, 2001
filing date -
Feb 11, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method comprising: a) selecting a loading variable from operating variables, the loading variable being directly related to total energy input into the system and equipment constraint of the system; b) selecting a performance specification variable which is required to be kept within a defined target at all times during operation of the system; and c) pairing the performance specification variable with a manipulated variable having a mass/balance relationship to the performance specification which is not the loading variable and; d) controlling the manipulated variable to maintain the performance specification variable with the defined target.
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