Waste heat boiler

High pressure waste heat boiler for the generation of high pressure hot water or high pressure steam.

Waste heat boilers utilise the heat in flue gases from combustion processes or hot waste air flows from industrial processes to generate hot water or saturated steam.

Due to economic and legislative considerations, waste heat boilers are frequently used in conjunction with gas turbines and combined heat and power units. The impact of rising energy costs, however, has also led to increased use of waste heat boilers to exploit the waste heat generated by industrial processes.

There are two different types of Viessmann waste heat boiler:

  • Waste heat boilers without additional combustion
    Here, only the flue gases/waste air flows are used for generating hot water or saturated steam.

  • Hot water or steam boilers with waste heat utilisation
    These are conventionally fired boilers that make additional use of waste heat.
    The boiler should be selected according to the conditions under which it will be used.

Waste heat boiler – shown here as
a single pass hot water boiler

Viessmann waste heat boilers are designed according to the flame tube/smoke tube boiler principle. Hot flue gas is directed through pipe bundles, where heat present in the gas is transferred to water inside the boiler body. Flue gas collectors are attached to the inlet and outlet sides of the waste heat boilers, where cleaning apertures are located and flue pipes are connected.