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Vacuum plays an important role in processes used in chemical production as well as the power industry. The vacuum requirements are similar regardless of the application: reduced production costs, low equipment maintenance, and minimal power consumption.
For a vacuum process in the power or chemical industry two types of vacuum pump systems are typically used: steam ejector systems and dry mechanical systems.
Historically, large multi-stage steam ejector systems supported by water sealed liquid ring or oil-sealed pumps have been used. However, these systems can be energy inefficient and rely on high steam quality for consistent performance.
Dry mechanical systems, on the other hand, have proven to be the most energy efficient solution as the savings are significant. By relying on multi-stage mechanical boosters supported by completely dry primary vacuum pumps, these systems achieve a cleaner and more stable vacuum level, resulting in an overall process improvement, whilst minimizing energy consumption. This, in turn, offers businesses the potential to generate a massive cost saving.
To illustrate just how significant these cost savings can be, we have developed a detailed cost of ownership comparison calculation between the two set-ups which you can download in the complete application note below:
High steam quality is a requirement for steam ejector systems to perform at their best. However, maintaining a high steam quality can be very costly. Firstly, high-quality steam is produced by boilers, which consume a significant amount of energy. Secondly, high steam quality requires the use of high-quality water, which must be treated and purified to prevent residues and corrosion. This water treatment process requires specialized equipment, which make for a sizeable investment. Finally, boilers need to be maintained and serviced regularly, which is a third factor contributing to an increasing cost for businesses relying on steam ejectors.