Regenerative Thermal Oxidizer (RTO)
- Exhaust gas volume rate of approximately 1,500 – 100,000 m³/h
- Purification of low - middle amounts of pollutant concentration in the exhaust gas
- Advantage: Lower primary energy consumption due to higher efficiency of heat exchanger
he Regenerative Thermal Oxidiser by Venjakob Umwelttechnik is particularly suitable for the removal of Volatile Orangic Compounds (VOC) in low to middle concentrations. This machine stands out for the following reason:
- The efficient removal of pollutants according to the German TA-Luft and the VOC Regulations
- A very high level of operating efficiency
- Low susceptibility to condensation
- Flexible uses
- Compact design
- Low operating costs
Through meticulously developed details, the RTO by Venjakob Umwelttechnik sets the standards for quality in the field of waste air purification.
Operation
- RVA diagram
The Regenerative Thermal Oxidiser ( RTO ) represents the most cutting edge technology in the field on purifying Volatile Organic Compounds ( VOC ). The procedure is based upon the fact thet also lower amounts of volatile pollutants can be burnt under suitable conditions without producing residue.
First and foremost these conditions require a combustion chamber with a temperature measuring over 800°C. That means that all of the exhaust gas must be heated up to this temperature in order to reach the degree of purification as required by law.
This process would have required a high amount of heat energy and therefore regenerative heat exchangers were developed in order to use as much energy from the clean gases as possible in order to heat up the cold dirty gases. These heat exchangers are normally made up of three individual chambers that are covered by ceramic in a honeycomb body structure.
The procedure can then be implemented when the pollutants can be burned. This is characterised by the high pre-heating of the exhaust gas within the alternating beds of the regenerative heat exchanger.
he optimally pre-heated exhaust gas is mixed with the hot combustion gases of the special incinerator in the oxidation chamber. When the temperature is high enough and a suitable length of exposure time has been reached, the organic pollutants contained in the exhaust gas is converted into non-polluting CO2 and H20 vapour.Only comparatively low emissions of NOx and CO are present due to the high efficiency of the heat exchanger (>95%) as well as the relatively high oxidation temperature (>800 °C). As a result of the low fuel consumption, the CO2 emissions are also greatly reduced.
At the end of the oxidation chamber, the purified exhaust gas is directed through a heat exchanger bed and the gas heats it up. Then the clean gas leaves the oxidiser in a cool state via the clean gas stack.
The heat exchanger chambers are alternately supplied with raw and clean gas via a PLC valve assembly. After every cycle change, the supplied chamber is to be cleaned of remaining pollutants before more raw gas is supplied. By doing this, illegal emissions can safely be avoided.
Excess energy can be used to generate warm water for example.
