Regenerative Afterburning

Thermal post-combustion systems with regenerative exhaust air preheating (RNV systems for short) are used to clean industrial exhaust air flows. The pollutants contained in the exhaust air - mostly volatile organic compounds (VOCs) such as alkanes, aromatic compounds, solvents and the like - are almost completely oxidized at high temperatures in the combustion chamber of the systems 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 systems are mainly used in industrial processes with low pollutant levels and low process heat requirements.

The CUTEC Institute's pilot plant is automated with an industry-standard control system and equipped with continuous data logging. With the help of a dosing station, up to three model pollutants can be added to the air simultaneously in defined concentrations. An SNCR system for the internal reduction of nitrogen oxides and a hot bypass are also available.

The CUTEC Institute's pilot plant can be used, for example, to answer the following questions:

- What 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 requirement depend on the operating mode and how can it be minimized?
- What degree of preheating can be achieved with certain storage masses?

In addition, it is possible to adapt the system technology according to the question and customer requirements. The design, manufacture and installation of equipment modifications can usually be carried out by our own employees.

• Volume flow: approx. 3,000 ^mN3/h
• Combustion chamber temperature: < 1,100°C
• Residence time: depending on operating conditions and equipment
• Burner output: < 150 kW

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