System and method for liquefying natural gas employing turbo expander
a technology of natural gas and turbo expander, which is applied in the direction of refrigeration and liquifaction, lighting and heating apparatus, solidification, etc., can solve the problems of limited moving parts within the major equipment, high operating cost, and natural gas liquefaction, and achieve the effect of reducing liquid nitrogen usag
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[0023]The present invention provides an improved system and method for liquefying natural gas employing a cryogenic liquid such as liquid nitrogen (LN). The preferred implementation of the improved system and method lowers the nitrogen consumption rate by using an expander like a radial inflow turbo expander in the nitrogen side. This reduction in nitrogen consumption rate is very important as it makes the described natural gas liquefier competitive with other designs. As used herein the term natural gas refers to both gas having naturally occurring hydrocarbons such as methane and ethane as well as various impurities and also the treated form of natural gas having some or all of the impurities removed.
[0024]FIG. 2 shows a schematic sketch of an improved cryogenic natural gas liquefier system 100 improved in accordance with the present invention as discussed in detail below. Several of the components illustrated may be conventional in nature and will not be described in detail. The ...
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