Tandem supersonic ejectors
AssigneeTransCanada Pipelines Limited
InventorsKamal K. Botros, John Geerligs, Hasan Imran
Life of this patent
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Abstract
Low pressure off gases such as from dry gas seals may be recompressed to a higher pressure using multiple tandem supersonic ejectors in which upstream ejectors operate at a higher nozzle exit Mach number than down stream ejectors and all ejectors are operated at exit Mach numbers greater than 1.
Claims21
A process for the repressurization of an off gas at a pressure from 68.94 kPa-g (10 psig) to 344.7 kPa-g (50 psig) and to a pressure from 2068.2 kPa-g (300 psig) to 3447 kPa-g (500 psig) comprising using two or more supersonic gas ejectors in tandem wherein an upstream supersonic ejector operates at an exit nozzle Mach number greater than the exit nozzle Mach number of the subsequent down stream supersonic ejectors and all ejectors operate at a nozzle exit Mach numbers greater than 1.
A process for the repressurization of an off gas at a pressure range of 68.94 kPa-g (10 psig) to 344.7 kPa-g (50 psig) and to a pressure range 2068.2 kPa-g (300 psig) to 3447 kPa (500 psig) comprising using first and second supersonic gas ejectors in tandem wherein the first supersonic gas ejector is operated at an exit supersonic Mach number greater than 2 and the second gas ejector is operated at an exit supersonic Mach number less than 2.
Dependencies are inferred from the claim text.