PROCESS AND DEVICES TO CLEAN AND REUSE DISPLACED OUTGOING AIR CONTAINING ADDITIVES (E.G. SOLVENTS) OR POLLUTANTS

摘要

The present invention relates to a process and devices to clean and reuse displaced outgoing air containing additives (e.g. solvents) or pollutants, especially to clean and reuse outgoing air with solvents displaced from drying devices in offset web-fed rotary presses. In the first stage of the process the outgoing air is passed through at least one condenser so that the additives or pollutants contained in the air can be condensed out. In the second step of the process the outgoing air treated from the first stage of the process is passed through at least one separator element in order to clean said air further from condensed additives or pollutants contained therein. Finally, the outgoing air treated after the second step of the process is returned for renewed absorption or suction of additives and pollutants.