Thermal afterburning plants with regenerative exhaust air preheating (in short: RNV plants) are used to clean industrial exhaust air streams. The pollutants contained in the exhaust air - mostly volatile organic compounds (VOC) such as alkanes, aromatic compounds, solvents and similar - are almost completely oxidised in the combustion chamber of the plants at high temperatures and converted into the harmless compounds carbon dioxide and water.
A very large proportion of the enthalpy of the hot clean gas is recovered by regenerators made of ceramic storage masses and used to preheat the exhaust air.
The plants are mainly used for industrial applications in processes with low pollutant contents and low process heat requirements.
The pilot plant of the CUTEC Institute is automated with a control system according to industrial standards and equipped with a continuous recording of measured values. With the help of a dosing station, up to three model pollutants can be added to the air simultaneously in defined concentrations. Furthermore, an SNCR system for the internal reduction of nitrogen oxides and a hot bypass are available.
The pilot plant of the CUTEC Institute can be used, for example, for the following questions:
- Which clean gas concentrations result from certain exhaust air compositions? - How do the oxidation and formation of secondary pollutants depend on the operating conditions (temperature, residence time, etc.)? - How does the fuel demand depend on the operating mode and how can it be minimised? - Which degree of preheating can be realized with certain storage masses?
In addition, it is possible to adapt the plant technology depending on the problem and the customer's requirements. Design, manufacturing and installation of equipment modifications can usually be realized by our in-house staff.
- Volume flow: approx. 3,000 mN3/h
- combustion chamber temperature: < 1.100°C
- Dwell time: depending on operating conditions and equipment
- Burner capacity: < 150 kW