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Freeze Condensing Vacuum Systems Offer Advantages. Vakuum‐Tiefkühlkondensation bietet Vorteile
Author(s) -
Lines J.R.
Publication year - 2003
Publication title -
vakuum in forschung und praxis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.213
H-Index - 13
eISSN - 1522-2454
pISSN - 0947-076X
DOI - 10.1002/vipr.200390021
Subject(s) - injector , condenser (optics) , process engineering , condensation , process (computing) , waste management , mechanical engineering , materials science , nuclear engineering , engineering , petroleum engineering , thermodynamics , computer science , physics , light source , optics , operating system
A freeze condenser ahead of a ejector system can improve performance of a process in a number of ways. The condenser will trap unwanted vapors so they don't entire an ejector system. That eliminates the need for alterate motive fluids, such as ethylene glycol or monochlorobenzene. The process is able to stay onstream longer because ejector plugging due to product buildup is avoided. Additionally, by removing the vapors in a freeze condenser the ejector system becomes less expensive and requires less utility consumption. Furthermore, the production of waste water and vent streams is less, so the environmental impact from a particular process is improved. Freeze condensation technology is not well known and may be often overlooked. It should be considered when evaluating vacuum system design criteria. Successful freeze condenser installations are in bisphenol‐A, phenol, fatty alcohols, polyester resin, 1,3‐propanediol, 1,4‐butanediol and edible oil applications. Be certain to specify the freeze condenser and ejector system as single unit. Proper freeze condenser performance comes from matching the ejector system to the condenser. An ejector should be designed to ensure it does not control freeze condenser operating pressure, the ejector system simply supports the condenser. The best vacuum is obtained when a freeze condenser is unrestrained by the ejector system. By specifying the freeze condenser and ejector system as a single unit, the likelihood of discontinunity between the two is eliminated. Conversion factors for converting between U.S. engineering and S.I. units of measure