Chemistry of hydrocarbon compounds – Aromatic compound synthesis – With measuring – sensing – testing – or synthesis operation...
Patent
1996-02-12
1998-03-24
Griffin, Walter D.
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
With measuring, sensing, testing, or synthesis operation...
585501, 585263, 208DIG1, C07C 1500, C07C 200
Patent
active
057314853
ABSTRACT:
An improved method of continuously controlling a multi-zone heater used in a chemical process has been developed. Each zone of the multi-zone heater has an ideal heat flux, FI, and an actual heat flux, FA, and the difference between the heat flux ratios, .DELTA.(FA/FI), of consecutive zones is to be less than a tolerance, T, where T is in the range of about 0.0 to about 0.1. The control is effected by determining the ideal heat flux, FI, of each zone in the heater and determining the actual heat flux, FA, of each zone in the heater. The difference between the heat flux ratios of FA/FI in consecutive zones is then calculated as .DELTA.(FA/FI). A manipulated variable of the chemical process is then adjusted according to an algorithm relating the changes in the manipulated variable to changes in the actual heat flux of each zone to afford a new value of the actual heat flux FAN where .vertline..DELTA.(FAN/FI).vertline..ltoreq..vertline..DELTA.(FA/FI).vertli ne. for consecutive zones. The process is repeated until .vertline..DELTA.(FAN/FI).vertline..ltoreq.T for all consecutive zones.
REFERENCES:
patent: 3471582 (1969-10-01), Lupfer
patent: 4132529 (1979-01-01), Schwimmer
patent: 4228509 (1980-10-01), Kennedy
patent: 4234410 (1980-11-01), Kelley
patent: 4236219 (1980-11-01), Killebrew, Jr. et al.
patent: 4367354 (1983-01-01), Dibiano
H. Besl, T. Cusworth, E. A. Livingston Presented at the Platforming Technical Services Symposium, , Chicago, IL, Jul. 27-29, 1993, "Advanced Controls Improve Profitability of UOP CCR Platforming"; also published in Fuel Reformulation Nov.-Dec. 1992 with minor changes from symposium.
Clary Dennis M.
Crowe Thomas J.
Griffin Walter D.
Maas Maryann
McBride Thomas K.
Snyder Eugene I.
UOP LLC
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