compact TNV

Thermal afterburning - recuperative compact system

Efficient energy utilization is ensured by the integrated tube bundle heat exchangers. The compact design enables flexible integration into the production process and efficient energy recovery through recirculation into the process. The patented secondary air burner uses the processed air as combustion air, thereby significantly reducing energy consumption. Our basket burner is a versatile burner system that can be operated with natural gas, oil, liquid gas and other fuel or process gases. Conversion to other fuels is possible without any problems.

Operating principle

The TNV is a compact thermal flue gas cleaning system with an integrated recuperative heat exchanger. Essentially, the system consists of a central steel combustion chamber, a burner and a tubular heat exchanger arranged in a ring around the combustion chamber. The pollutant-laden exhaust air is extracted by a fan from the process and fed into the cleaning system. To reduce fuel consumption, the exhaust gas is preheated considerably by the integrated heat exchanger before the installed burner is used in order to reach the required reaction temperature. Oxidation of the pollutants takes place at a temperature of approximately 700 - 750°C. The purified flue gas then flows through the integrated heat exchanger again, transferring a large proportion of its energy to the pollutant-laden raw gas. The purified exhaust gas essentially contains O2, N2, CO2 and H2O and can be released into the atmosphere.

The purified exhaust air still contains energy that can be utilized by optional, customer-specific downstream heat exchangers (air, water, steam, thermal oil).

Industry solutions

Our highly efficient TNV systems are used in areas with:

  • low volume flows
  • high pollutant concentrations
  • need for thermal energy in the production process
  • or shorter production cycle times
  • processes with aerosol or particle formation

Typical areas of application are

  • Surface finishing/ protection
    • Automotive industry
    • Printing industry
    • Coating processes

Technical data

Exhaust air volume 500 bis 30.000 Nm³/h
Heat exchanger efficiency up to 70 %
Pollutant concentration VOC (0- 25% UEG)         0 – 10 g/Nm³


  • Wide range of applications that can be optimally adapted to customer or production-specific requirements
  • Optimized/low energy consumption
  • Can be integrated into the production system
  • The robust design ensures a very long lifetime
  • Low maintenance requirements
  • Easy accessibility and therefore good cleaning options
  • High potential for heat recovery with water, thermal oil, steam or air
  • No need for additional combustion air - the patented secondary air burner uses the preheated process exhaust air as combustion air and thus substantially reduces energy consumption.
  • Alternative fuels such as oil or liquid gas are possible
  • Suitable for processes with aerosol and particle formation (dust, ash, etc.)
  • Low space requirement due to the compact design and comparatively low weight
  • The system can be installed indoors/outdoors, horizontally/vertically, on a foundation/steel structure or on a roof

Further products

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