Pipeline gas pressure reduction with refrigeration generation

Details Pipeline gas pressure reduction with refrigeration generation Pipeline gas pressure reduction with refrigeration generation

B - Operations, Transporting

01

D

162/111

B01D 53/14 (2006.01)

Patent

CA 1237063

PIPELINE GAS PRESSURE REDUCTION WITH REFRIGERATION GENERATION ABSTRACT The high pressure of pipeline gas is reduced to the low pressure of a distribution system with simultaneous generation of refrigeration by passing the gas through two successive centrifugal compressors driven by two turbo- expanders in which the compressed gas is expanded to successively lower pressures. Refrigeration is recovered from the gas as it leaves each turbo-expander. Methanol is injected into the pipeline gas before it is expanded to prevent ice formation. Aqueous methanol condensate separated from the expanded gas is distilled for the re- covery and reuse of methanol.

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