Wallstein Holding GmbH & Co. KG

Flue gas cleaning systems

When solid, liquid, and gaseous waste is burnt for the purpose of energy recuperation, environment-polluting emissions are released which need to be purified before they are discharged into the atmosphere. 

Wallstein offers various flue gas cleaning solutions based on the specific customer’s requirements, installation location, and last but not least, the emission limits to be met.

Dry, semi-dry and combined systems are used, with additional catalytic or non-catalytic denitrification. Our experienced engineers will select the optimal solution for each application, both in technical and economic sense. 

An example of application is described below: flue gas cleaning at an industrial laundry.

When heavily soiled cleaning cloths are laundered, hydrocarbon vapors are produced. These vapors are condensed in a packed-bed condenser (not described further in this document) and recycled into oil which is used as fuel in a boiler, thus decreasing the energy consumption.

In this case, the main components of the flue gas cleaning system are: a heat exchanger, a flue gas scrubber, and a dust filter. The flue gas scrubber separates the acidic inorganic gas component, and the dust filter isolates fine particles. The heat exchanger serves two purposes: precooling of the hot flue gas after the boiler, and reheating it over the acid dew point before the dust filter.

Flue gas cleaning in an industrial laundry
Flue gas cleaning in an industrial laundry