Heat exchangers, also known as a tube cooler is installed upstream of the dust collector for gas cooling purposes when temperatures can peak at 932^o F (500^o C) and higher.

Tube coolers come in a range of tube dimensions to suit the required application and particular attention is paid to ensuring that the tube bundle has consistent static pressure and temperature.  Cooling fans are connected in groups or individually to ensure temperature control.  If necessary, tube coolers can be fitted with integrated emergency cooling equipment.

With heat exchangers, heat from exhaust gas is transferred to the cooling air.  For dry exhaust gas, tube coolers are operated in cross-flows or cross-counter-flows in most cases.  The gas needing to be cooled is fed into the tube cooler through inlet hoods and cooled on the exterior side in cross-flow mode with ambient air supplied by axial fans.  Depending on the requirements, the tube coolers are manufactured in one or multiple-stage designs that can be used on the cool air side as well as the exhaust air side of an installation.