Exhaust Air Purification Technology

The TNV is able to process exhaust air streams with a high solvent load. The exhaust air preheater, in which the exhaust air is preheated before it enters the combustion chamber, is an integral part of the TNV. The combustion chamber is equipped with the Eisenmann BLUEMAX burner, which enables the combustion chamber to be operated in compliance with the strict CO specifications. At the same time, the legal TOC and NOx limits are clearly below the limit .

Thanks to the modular structure of the Eisenmann TNV, a wide variety of specifications for volume flows and solvent loads can be mapped. This offers decisive advantages when using coating materials containing silicon. For special tasks, structured pipes are used that significantly improve heat recovery.

The need for additional fuel for the operation of the TNV depends on the pollutant content of the exhaust air and the desired heat output.

The proven construction is considered to be very robust and highly available. More than 1,300 systems built are evidence of the long experience and constant further development of this system.

Due to the low use of additional energy, regenerative post-combustion (RNV) is a very efficient exhaust air purification system. With the Eisenmann solution, the more complex flap technology is replaced by a special air distribution system with a rotary valve, which guarantees maximum availability and low maintenance.

The Eisenmann RNV is characterized by uncomplicated, robust technology and low operating costs. The space-saving one-reactor system cleans exhaust air flows from 10,000 to 120,000 Nm³ / h, depending on the size. Several reactors are connected in parallel for larger amounts of air.

Exhaust air purification through adsorption In
contrast to thermal processes, adsorption works without converting the pollutants and without increasing the temperature. Adsorption uses the property of certain solid substances (e.g. activated carbon, zeolite) to accumulate gases or vapors on their surface. These accumulated pollutants have to be expelled again later. The adsorption is therefore always followed by the desorption. The resulting desorption flow is concentrated up to a factor of 20 and is correspondingly smaller in volume. It can therefore also be cleaned much more cheaply.

Adsorption wheel (ADR)
Adsorption is used to concentrate lightly loaded exhaust air flows. The smaller and more concentrated the exhaust air flow to be disposed of, the lower the investment and operating costs. This is why concentration as a preliminary stage is necessary, especially in the case of large but only weakly loaded exhaust air flows, in order to make the final incineration or solvent recovery economical.

The combustion chamber is ideal for cleaning exhaust air flows with high halogen loads and explosive solvent mixtures. Eisenmann has various configurations of combustion chambers in its portfolio. Depending on the application, the Turaktor is used as a standing or lying combustion chamber for cleaning harmful gases. The Eisenmann combustion chamber is integrated into production with a suitable heat recovery system and reliably complies with the required exhaust air limit values through the corresponding flue gas cleaning.