The reaction process of many petrochemical plants needs to be carried out under vacuum or low pressure, which can improve the yield or reaction efficiency of the product. For example, the vacuum pumping system of the atmospheric and vacuum reducing tower, the vacuum pumping system of the styrene extraction device, and the vacuum pumping system of the PBAT and PTA degradable plastic devices.

Petrochemical plant in the production of oil and chemical products at the same time, will also produce a lot of useless and even harmful waste water, waste gas and solid waste. Liquid ring vacuum pumps are often used in VOCs, CCUS and other devices to capture waste gas, and then centrally transported to the terminal for treatment.