Multiple reboiler system

Details Multiple reboiler system Multiple reboiler system

1994-06-13

1995-10-10

Manoharan, Virginia

Distillation: apparatus

Apparatus

Systems

202155, 202173, 202235, 203 23, 203 25, 203 27, 203 78, 203DIG8, 203DIG9, B01D 300

Patent

active

054572770

ABSTRACT:
To heat the circulating reboiler streams of multiple distillation columns a fired reboiler is provided for a first column requiring the most heat. A portion of the bottoms from the first column is passed through the tubes of the heater in the fired reboiler and recycled to the first column as is normal. A slip stream is taken from the recycle after heating and passed on to provide heat by indirect heat exchange to a second reboiler and if desired other reboilers or heat exchangers. The slip stream may then be recycled to the bottoms of the first column directly or to the circulating steam of the first reboiler. A portion of the recycled slip stream can be taken as feed into the second column.

REFERENCES:
patent: 2577701 (1951-12-01), Deming et al.
patent: 3402124 (1968-09-01), Jones
patent: 3442770 (1969-05-01), Wentworth et al.
patent: 3494861 (1970-02-01), Munro
patent: 4129606 (1978-12-01), Gewartowski
patent: 4162198 (1979-07-01), Stockburger et al.
patent: 4273620 (1981-06-01), Knobel
patent: 4778567 (1988-10-01), Kakimoto et al.
patent: 5035776 (1991-07-01), Knapp et al.
patent: 5116485 (1992-05-01), Krisa

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