TNV - Thermal Recuperative Air Purification

Areas of application

TNV Produktbild
Thermal air purification systems, with recuperative exhaust air preheating, are particularly suitable for applications with small to medium-sized exhaust air flows and high hydrocarbon concentrations, as well as a need for secondary heat recovery. Problematic exhaust air flows, e.g. with high dust loads or a tendency to produce condensates, can also be treated using this tried and tested, universal method.

By using effective heat recovery systems, e.g. for steam, hot-water production or applications involving heat transfer oils, TNV systems are still cost effective today for many applications. 


Brennkammer BK
A special version of the thermal exhaust air purification systems uses combustion chambers without integrated heat exchangers. These systems are used when there is either a very high requirement for waste heat or when the units have short operation times.

Process description

With this exhaust air purification method, the process air to be cleaned is first preheated as it flows through the integrated bundle heat exchanger and then almost completely oxidised to form carbon dioxide and water vapour at temperatures, ranging from about 720 to 750°C. The burner output required for this is controlled automatically depending on the calorific values of the pollutants and their concentration.


Schnittschema TNV, Thermische Abluftreinigung
Operating principle thermal (recuperative) exhaust air purification TNV