System for recovering solvents and disposing of contaminants rel

Details System for recovering solvents and disposing of contaminants rel System for recovering solvents and disposing of contaminants rel

1991-04-17

1992-09-22

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

55 74, B01D 5304

Patent

active

051493420

ABSTRACT:
An environmentally-safe system and process for recovering solvents and disposing of contaminants released by regeneration of one or more solvent-laden air (SLA) adsorbers. The process begins with regeneration of the carbon in the adsorbers with low-pressure steam, and condensation/cooling of the resulting steam and reclaimed solvent/contaminant mixture. The mixture flows by gravity to a decanter for separation into two layers. From the decanter, the upper solvent-plus-contaminant layer flows to intermediate storage prior to further purification in a liquid extraction unit. The lower water-plus-contaminant layer flows to a water layer tank for further purification in a combined stripping and rectification system and, finally, either to the sewer or to an optional steam regeneration unit. The contaminants released by stripping and rectification are concentrated and then cleanly and essentially completely incinerated in a thermal oxidation system to produce environmentally safe incineration exhaust gases.

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patent: 4409006 (1983-10-01), Mattia
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patent: 4902310 (1990-02-01), Vara et al.
patent: 4919692 (1990-04-01), Vara et al.
patent: 5015365 (1991-05-01), Vara et al.

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