Recirculating rotary gas compressor
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United States of America Patent
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-
Aug 8, 1995
Grant Date -
N/A
app pub date -
Jan 27, 1994
filing date -
Jan 27, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A positive displacement, recirculating Roots-type rotary gas compressor which operates on the basis of flow work compression is disclosed. The compressor includes a pair of large diameter recirculation conduits (30 and 32) which return compressed discharge gas to the compressor housing (16), where it is mixed with low pressure inlet gas, thereby minimizing adiabatic heating of the gas. The compressor includes a pair of involutely lobed impellers (12 and 14) and an associated port configuration which together result in uninterrupted flow of recirculation gas. The large diameter recirculation conduits equalize and accelerate gas flow velocities within the compressor and minimize gas flow losses. The compressor is particularly suited to applications requiring sustained operation at higher gas compression ratios than have previously been feasible with rotary pumps, for example continuous pumping of natural gas in gas transmission facilities.
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