Direct Contact Heat Recovery/Gas Cooling
Amerair has a complete line of direct contact heat exchangers that are designed to recover heat from process waste gases and transfer this valuable heat to process slurries or plant water heating systems. Amerair’s direct contact heat exchangers can be applied to hot process emission controls systems utilizing any type of particulate control device. Process water or slurries, having solids content as great as 65%, have been successfully heated creating substantial annual energy savings. Typical installations include the use of a spray/packed tower on steam boilers to heat boiler feedwater and on spray dryers to heat slurry prior to drying.
Our top quality direct contact heat exchangers can also be used to reduce process gas temperatures to specified levels. By reducing the gas volume and condensing water vapor the horsepower required by a downstream fan can be reduced up to 40% in many applications. Typical installations include the use of a spray/packed tower on basic oxygen furnaces and cupolas to reduce downstream gas volumes and save more than 1,000 BHP.
This direct contact gas cooler condenses water vapor and removes sensible heat from a product spray dryer exhaust. The tower’s structured packing allows the unit to operate with high solid content slurries. The recovered heat is used to preheat the spray dryer feed water, substantially improving overall process system thermal efficiency. This unit handles 60,00 ACFM at 170°F WB temperature.