Recovery of VOC Exhaust Gases from Film Plants

Recovery of VOC (Volatile Organic Compounds) off-gas from film plants is environmentally and economically important.

VOC tail gas recovery typically involves the following steps:

Collection: The VOC tail gases from the film production process are collected through pipework and collection systems.

Pre-treatment: Removal of impurities, particles, etc. from the tail gas to protect the subsequent recovery equipment.

Recycling method selection: Common recycling methods include adsorption, condensation and membrane separation.

The adsorption method uses adsorbents (such as activated carbon) to adsorb VOC molecules, which are then desorbed and recovered by heating or depressurisation.

Condensation is used to reduce the temperature so that the VOC is condensed into a liquid for recovery.

Membrane separation uses special membrane materials to selectively separate VOCs.

Recovery of VOC tail gases brings many benefits:

Environmental protection: Reduce the pollution of VOC emission to the atmosphere and reduce the harm to human health.

Economic aspects: the recovered VOC can be reused, reducing the cost of raw materials.