Environmentally Friendly Dry Vacuum Pumps Save Energy with the Lowest Cost of Ownership in Chemical and Biofuel Processes
By Dr. Don Collins, Market Development Manager – Chemical Sector, Edwards |
Demands in the chemical processing industry to reduce energy consumption and carbon footprint are higher than ever before. Correct sizing and selection of vacuum systems can contribute significantly to optimizing throughput and efficiency, thus reducing energy consumption, capital and running costs, and pollution.
This article compares traditional ‘wet’ vacuum systems, such as steam ejectors and liquid ring pumps, with ‘dry’ mechanical systems, and discusses how dry pumps enable chemical plants to achieve higher efficiencies and save energy. It looks in particular at the example of biofuel processing in the chemical industry.
Traditional steam ejectors and liquid ring pumps
Wet vacuum raising equipment includes steam or water ejectors, liquid ring pumps, and rotary vane and rotary piston oil-lubricated vacuum pumps.
Steam ejectors have been used throughout the chemical industry, mainly because of their extremely high reliability and robustness in arduous and corrosive conditions. Steam ejectors can cover the full range of vacuum to 10-3 mbar with very high suction capacities not easily obtained by other means. However, they are load specific and very sensitive to variations in process…