Abstract: This paper focuses on the environmental pollution and management of domestic and international enviroment, based on the engineering experience of polymerization gas recovery and oil & gas recovery, the application characteristics of the water ring pump unit in these different processes was introduced for specific cases under different process conditions. A digital structure model of the water ring compressor was established. The paper investigated the structure parameters formula of water ring vacuum pump under different process parameters, the combination of different process conditions and the materials selection. The development direction of equipment is energy -saving and environment -friendly. It shows that the chemical gases vacuum - compression recovery system has great potential in energy saving and corrosion resistance depend on industry innovation and technological progress.

Key words: vacuum, compression, polymerization, gas recovery, vacuum system