In recent years, with the enhancement of people's awareness of environmental protection, the international and domestic environmental protection requirements for petrochemical plants, as well as from the waste recycling and reuse, reduce production costs, and create higher economic benefits for the enterprise on the consideration of the process of ethylene, propylene plant tail gas recovery have greater social and economic benefits.

Oil tanks, loading emission gas, petrochemical and chemical production of VOC-containing tailpipe gas, the first variable pressure adsorption concentration, and then condensation recovery process, so as to meet the requirements of environmental protection emissions, but also to recover part of the organic matter.

After the vinyl chloride tail gas is divided into liquids by the liquid separation tank, there are still a large amount of vinyl chloride and acetylene, and the vinyl chloride and acetylene are concentrated and recovered by the adsorption method, which is of high economic value.