Auxiliary equipment

Air preheaters and gas-gas heaters

Regenerative heat exchangers play an important role as air preheaters in fossil fuel-fired steam power plants. When used for flue-gas desulfurization and tail-end selective catalytic reduction, they function as gas-gas heater (GGH).

Our APH and GGH heat exchangers are based on the rotating, regenerative, counter-flow principle. Heat transfer elements placed as a matrix in an open rotor transfer heat from one gas side to another when slowly rotating.

The heaters are equipped with various sealing systems in order to minimize leakage of air to flue gas or untreated gas to treated gas.

We can modernise and improve the performance of existing heaters regardless of make. The work can comprise installation of new, improved sealing systems, delivery of an enameled heating surface or general repair and maintenance work