Patent ID: 6261412
Filing Date: 2001-07-17
Classification: B01D,D21C,Y02P

Abstract:
A method of treating foul condensate comprising:(a) collecting foul condensate containing Hazardous Air Pollutants (HAPS) in a pulp mill; the foul condensate having a temperature of between about 140-180 degrees F.;(b) passing the foul condensate into direct contact with heated vapor at a plurality of series connected stations to gradually heat the foul condensate to a temperature desirable for steam stripping;(c) steam stripping the heated foul condensate to produce a high temperature clean condensate;(d) flashing the high temperature clean condensate in a plurality of flash stations to produce a heated vapor and a lowered temperature clean condensate; and(e) using the heated vapors from (d) to heat the foul condensate in each of the stations from (b).