Steam Ejector Applications — Industries and Vacuum Process Applications
Steam jet ejectors manufactured by Primetech are used across process industries for vacuum generation, condenser air extraction, gas compression and gas removal. Their advantages — no moving parts, ability to handle condensable vapours and corrosive gases, and low maintenance cost — make them the preferred choice for demanding industrial vacuum applications.
Petroleum Refinery Ejector Applications
Petroleum refineries use three and four stage steam jet ejector systems for vacuum distillation unit (VDU) overhead vacuum systems. Operating at 10-30 mmHg absolute at the column top, the ejector system handles large volumes of non-condensable gases, light hydrocarbons and steam from the vacuum distillation column overhead. Lube oil refining VDUs require deeper vacuum of 2-15 mmHg for lube oil fractions to prevent thermal cracking. Primetech designs VDU ejector systems to HEI Standards with custom inter-condenser sizing.
Chemical and Petrochemical Ejector Applications
Chemical plants use steam ejectors for vacuum reactor systems in polymerisation, esterification and polycondensation reactions. Steam ejectors handle condensable monomer vapours and solvents without damage — an advantage over mechanical vacuum pumps. Tamil Nadu Petroproducts Limited (TNPL), a repeat customer, relies on Primetech ejectors for PVC reactor vacuum systems. Two and three stage ejectors are used for solvent recovery columns handling MEK, acetone, DMF and other solvents.
Pharmaceutical Ejector Applications
Pharmaceutical manufacturers use two and three stage steam ejectors for vacuum tray dryer and rotary dryer systems, maintaining 5-50 Torr absolute for API drying at 40-60 degrees Celsius to protect thermally sensitive active pharmaceutical ingredients and meet ICH Q3C residual solvent limits. Four stage ejectors are used for freeze dryer (lyophiliser) vacuum systems at 0.5-2.0 Torr absolute for injectable biologic sterile drug products.
Edible Oil Refinery Ejector Applications
Edible oil refineries use three and four stage steam jet ejectors for deodorisation column vacuum systems. Operating at 2-6 Torr absolute at 230-260 degrees Celsius, the deodoriser strips free fatty acids, off-flavours and colour pigments from vegetable oils including sunflower, palm, soya and rapeseed. Primetech ejectors handle the large specific-volume gas loads at deodoriser operating conditions and are available in alloy construction resistant to fatty acid attack.
Power Plant Ejector Applications
Power plants use two stage steam jet ejectors with inter-condensers as holding ejectors for continuous condenser air extraction, maintaining design condenser vacuum of 38-53 Torr absolute. Single stage hogging ejectors pull down condenser pressure from atmospheric during plant start-up in 15-30 minutes. Primetech holding and hogging ejectors comply with HEI Standards for Steam Surface Condensers and have been supplied to thermal power plants in India and internationally.
Fertiliser Plant Ejector Applications
Fertiliser plants use three and four stage steam ejectors for urea plant vacuum evaporation systems, maintaining 2-5 Torr absolute for final urea melt concentration to 99.7 percent. Gas jet ejectors using synthesis gas or nitrogen motive are used in ammonia plant synthesis loops. DCM Shriram Fertilizers is a repeat customer for Primetech steam ejectors in fertiliser plant service.
Marine and Offshore Ejector Applications
Marine applications for ejectors include bilge ejectors, ballast ejectors, cargo pump priming ejectors and fresh water generator vacuum ejectors. Primetech marine ejectors are supplied to class society standards including Lloyd's Register, DNV, Bureau Veritas and ABS, in stainless steel, naval brass and bronze construction for seawater service. Available as compact flanged units for direct installation on ship pipework systems.