The fan (4) draws the pollution loaded waste air from the source and takes it over the process zone (1) of the VOC concentrator, where the pollutants are adsorbed. The purified process air leaves through the stack (5) into the atmosphere. The secondary fan (6) draws a defined volume of the process air over the cooling zone (2) of the rotor and then through the secondary air preheater (9), where it ist preheated to the required release temperature. The pollutants are then released by the adsorption material in the release zone (3). The secondary air volume, which is now highly loaded, is heated in the air preheater of the the waste air purification system (8) to the highest possible temperature, to enable an economical thermal or catalytic oxidation in the reaction chamber (7).
The waste air preheater (8) and the secondary air preheater hence remove energy from the purified gas stream in steps, before it exits through the stack (10).
Discontinous adsorption and release
The process fan (2) draws the pollution loaded production air (1) through a tank filled with adsorption material. The pollutants are deposited in the material, and the purified process air leaves through the stack (3). After the adsorption process is finished, the release process starts.
The fan (6) draws in fresh air (4) which is heated in the secondary air preheater (9) to the required temperature. Release (5) takes place crosswise to adsorption. The loaded air is then preheated in the waste air preheater 8 of the thermal or catalytic waste air purification plant to the highest possible temperature. The pollutions are then converted to H2O and CO2 in the reaction chamber (7) of the system. The purified gas is cooled in the waste air and secondary air preheaters and then leaves through the stack (10).
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