For exhaust gas cleaning, in particular in debinding, Nabertherm offers exhaust gas cleaning systems tailored to the process. The afterburning system is permanently connected to the exhaust gas fitting of the furnace and accordingly integral part of the control system and the safety matrix of the furnace. For existing furnaces, independent exhaust gas cleaning systems are also available that can be separately controlled and operated.

Catalytic exhaust cleaning is especially recommended due to energetic reasons when only pure hydrocarbon compounds must be cleaned during the debinding process in air. Thermal afterburning systems are used if large volumes of exhaust gas from the debinding process in air must be cleaned and/or if there is a risk that the exhaust gases might damage the catalyst. Thermal afterburning is also used for debinding applications under protective gas or under hydrogen.

Catalytic afterburning systems (KNV)

• Perfectly suited for debinding processes in air with only organic exhaust gases
• Catalytic conversion of the unburned hydrocarbons to their nontoxic, natural components
• Integrated in a compact stainless steel housing
• Electric heating provides for preheating of the exhaust gas to the optimal reaction temperature for catalytic treatment
• Cleaning in different layers of catalytic honeycombs within the system
• Thermocouples for measuring the temperatures of raw gas, reaction honeycombs and discharge
• Over-temperature limit controller with adjustable cutout temperature protects the catalyst
• Tight connection between the exhaust gas outlet of the debinding furnace and the exhaust gas fan with corresponding integration into the overall system with respect to control and safety technology
• Catalyst dimensioned in reletion to the exhaust gas flow
• Measuring port for clean gas measurements (FID), see additional equipment

Thermal afterburning systems (TNV)

• Optimally suited for debinding processes in air with large exhaust gas flow, erratic large exhaust gas volumes, large volume flow or for debinding processes under protective gases, hydrogen or in vacuum
• Burn-off at temperatures up to 850 °C provides for thermal decomposition of the exhaust gases
• Heating with compact gas burner with automatic firing device
• Thermocouples in the combustion chamber and in the raw gas inlet
• Over-temperature limit controller for protecting the thermal afterburning
• Design depending on the exhaust gas flow
• Measuring port for clean gas measurements (FID), see additional equipment

Additional equipment for catalytic afterburners and thermal afterburners

• Design for retrospective integration in existing furnace systems, including system-independent control of the thermal afterburner heating or catalytic afterburner heating
• Compliance with national exhaust gas regulations
• Emission measurements (FID) for compliance with exhaust gas regulations