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STEADY UNDER PRESSURE

Method 5: 1A: Control recycle vapor rate to ejector: ejector discharge recycle.

Method: Vary net vapor rate, no make-up gas.
Process: Vacuum systems. Must always have vapor product.
Advantages: All ejector discharge available for recycle. Often gives the most stable operation.
Disadvantages: Difficult to implement in systems with the ejector directly attached to its condenser. Relatively large recycle line and control valve often required.
Application: The best ejector pressure control system for ejectors that are not stable to zero load. Often the most economical system for stable ejector control.
Variants: Recycle to upstream of condenser: requires process compatible with water and water removal in condensate drum.
Configuration notes:
Operation: Recycle gas moves the vacuum jet ejector along its operating curve. The higher the load to the ejector, the higher the ejector suction pressure.
Warnings:


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This page updated 03 April 2000.
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