Regenerative thermal oxidizer (RTO)

Regenerative thermal oxidizer (RTO) is usually applied in the purification of exhaust gases from offset printing, gravure printing and flexographic printing as well as painting and lamination processes. The exhaust air treatment is based on a flameless oxidation at the temperature above 800°C. A compact housing normally contains three heat-exchanging chambers which are fitted with storage elements in the form of high-quality honeycomb bodies.

Cold streams of exhaust gases are passed through the honeycomb body and heated up to the total oxidation temperature. After complete pollutant conversion to the carbon dioxide and water in the incineration chamber the purified air is directed into the next chamber where the excessive heat is transferred to the ceramic material. The auto-thermal operation is to be quickly achieved due to high efficiency of the heat exchanger.


Technical Data RTO*

Exhaust air flow 30.000 Nm3/h
Pollutant type, VOC EtOH/EtAc
Pollutant  heating value 26.800 kJ/kg
Pollutant concentration  0 – 8 g/Nm3
Exhaust air temperature 50 °C
Fuel type back-up burner Natural gas
Gas flow pressure 80 – 150 mbar
Oxidation temperature approx. 840
Heat exchanger degree of efficiency 95,5  %
Gas consumption with 0 g/Nm³ solvent 55  Nm³/h
Gas consumption with 1 g/Nm³ solvent 31  Nm³/h
Gas consumption with 2 g/Nm³ solvent 7  Nm³/h
Gas consumption with 2,3 g/Nm³ solvent 0  Nm³/h
Average clean gas temperature ~100 °C
Remaining pollutant concentration total C < 20  mg/Nm3
Remaining pollutant concentration CO < 100  mg/Nm3
Remaining pollutant concentration NOx < 100  mg/Nm3
Electrical connection 380-410 V / 50 Hz / 3 Ph +N
Electric power requirement exhaust air fan 65 kW
Total installed power consumption 81 kW
Compressed air volume flow (6-7 bar, dew point min. –40°C) 16 l/min.
Length x Width  x Height approx. [m] 7,8 x 6,0 x 4,8
Weight approx. 45 t
*data based on the RTO type of 30.0, printing industry


Company name / CityCountry
Nizhny Novgorod
Russian Federation Russian Federation
WEGO Flexodruck
Germany Germany
Greece Greece
Alcan Packaging
France France
Belgium Belgium
St. Petersburg
Russian Federation Russian Federation
Latvia Latvia
A & R Carton BV
Netherlands Netherlands
Visiocorp Hungary
Hungary Hungary
Fremach Morava
Czech Republic Czech Republic
Poland Poland
PPT Precision Process Technology S.A.
Barbera del Valles
Spain Spain
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BLN Consulting is a multi-industry consulting company, which offers professional support in the realization of diversified projects in Europe, Russian Federation and in the Commonwealth of Independent States.

Our core business lines are:

  • Multimodal transportation of various goods with the use of all kinds of surface, air and maritime transport as well as organization of customs processing
  • Recycling of used oils in the plasma tube reactor 
  • Recovery of wasted solvents via vacuum distillation including fractionation
  • Exhaust air treatment via thermal incineration, regenerative and catalytic oxidation including heat recovery system
  • Nitrogen generation with PSA and cryogenic plants

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