Vacuum systems with mixing condensers and process-vapour operated ejectors
If ejectors are applied for generating a vacuum, process vapour offers considerable advantages. The ejectors shown here are used to evacuate the polycondensation stage of a PET manufacturing process and generate a suction pressure of <1 mbar. The whole vacuum system is operated as a closed-loop unit and uses ethylene glycol (EG, Glycol) as motive vapour, cooling and operating liquid.
These ejectors are double-jacketed and heated with HTM (oil) at 300 °C. Mixing condensers are installed between the ejectors for condensation purposes. Polyethylene terephthalate (PET) is a thermoplastic of the polyester family, which is fabricated by means of polycondensation. Körting has been reliably fulfilling the high demands on these installations for decades and has successfully installed more than 200 of this kind of systems world wide.
Advantages at a glance
- environment-friendly (no cooling water and air pollution)
- energy-saving due to high efficiency
- environmental protection integrated into the process
Deliverable options
- controllable vacuum systems with mixing condensers
- vacuum systems with mixing condensers and liquid ring vacuum pump
- vacuum systems with mixing condensers for non-barometric installation
- vacuum systems with mixing condensers in closed alkaline loop (chilled water)
- vacuum systems with mixing condensers in closed alkaline loop (cooling water)
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