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07/17/1994 01:28 .3109875350 T=S TC-_Ii =AH e3 <br /> v .i <br /> Novi that the VOCs have been destroyed, the remaining vapor and dust <br /> particula•:e pass into a cooling air-to-air heat exchanger where the air mass is <br /> cooled `porn 1450°F down to 375°F. Once cooled, they pass into the baghouse <br /> where the dust is separated away from the remaining water vapor which <br /> Passes through the Nomex high temperature filter bags. The dust, unable to <br /> penetrate the bags, clings to the bag exterior until the bag is pulsed with a high <br /> velocity, high pressure,short duration air blast, thereby shaking the dust off the <br /> bag exterior where it falls to a pick-up auger and is transferred over to the <br /> discharge Pugmill to be mixed with the clean soil. <br /> The watOr vapor, free from particulate, passes through the Nomex bags <br /> and exirs the exhaust stack at the end of the baghouse. <br /> L <br />