Natural gas liquids recovery device and method
First Claim
Patent Images
1. A natural gas liquids (NGL) recovery system comprising:
- an inlet configured to receive feed gas from a first location of a transportation pipeline;
a dehydration unit connected to the inlet to receive the feed gas and configured to extract predetermined components from the feed gas to produce a dry gas;
a NGL unit configured to receive the dry gas from the dehydration unit and configured to separate the dry gas into a fuel gas and a NGL mix;
a first outlet connected to the NGL unit and configured to output the fuel gas to a gas turbine to be ignited; and
a second outlet connected to the NGL unit and configured to output the NGL mix back to the transportation pipeline, at a second location situated downstream from the first location.
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Abstract
A natural gas liquids (NGL) recovery system and method for separating NGLs from a feed gas is provided. The method includes receiving the feed gas; increasing a pressure of the feed gas by running the feed gas through a compressor connected to a gas turbine; diverting part of the feed gas from an output of the compressor and feeding the diverted part to a dryer; drying the diverted part to remove water and produce a dry gas; expanding the dry gas in a turbo-expander; separating the expanded gas into the NGL and fuel gas; and providing the fuel gas to the gas turbine as fuel without contamination.
18 Citations
20 Claims
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1. A natural gas liquids (NGL) recovery system comprising:
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an inlet configured to receive feed gas from a first location of a transportation pipeline; a dehydration unit connected to the inlet to receive the feed gas and configured to extract predetermined components from the feed gas to produce a dry gas; a NGL unit configured to receive the dry gas from the dehydration unit and configured to separate the dry gas into a fuel gas and a NGL mix; a first outlet connected to the NGL unit and configured to output the fuel gas to a gas turbine to be ignited; and a second outlet connected to the NGL unit and configured to output the NGL mix back to the transportation pipeline, at a second location situated downstream from the first location. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A station for pumping natural gas liquids (NGL) in a transportation pipeline, the station comprising:
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a turbo-compressor package connected to a pipeline inlet and configured to raise a low pressure of an input feed gas to a high pressure; an NGL recovery package connected to the turbo-compressor package and configured to receive the feed gas having the high pressure; and a filter package configured to receive a fuel gas from the NGL recovery package, to heat and filter the received fuel gas, and to provide the heated and filtered fuel gas to the turbo-compressor as fuel; wherein the NGL recovery package comprises; an inlet configured to receive the feed gas from a first location of the transportation pipeline; a dehydration unit connected to the inlet to receive the feed gas and configured to extract predetermined components from the feed gas to produce a dry gas; a NGL unit configured to receive the dry gas from the dehydration unit and configured to separate the dry gas into a fuel gas and a NGL mix; a first outlet connected to the NGL unit and configured to output the fuel gas to the filter package; and a second outlet connected to the NGL unit and configured to output the NGL mix back to the transportation pipeline, at a second location situated downstream from the first location. - View Dependent Claims (17, 18)
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9. A processing system for separating natural gas liquids (NGL), the system comprising:
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a turbo-compressor package configured to compress an input feed gas that flows through a transportation pipeline to a first location of the transportation pipeline to raise a low pressure of the input feed gas to a high pressure; an NGL recovery package connected to the turbo-compressor package and configured to receive the feed gas having the high pressure; and a filter package configured to receive a fuel gas from the NGL recovery package, to heat and filter the received fuel gas, and to provide the heated and filtered fuel gas to the turbo-compressor as fuel; wherein the NGL recovery package comprises; an inlet configured to receive the feed gas having a high pressure; a dehydration unit connected to the inlet to receive the feed gas and configured to extract predetermined components from the feed gas to produce a dry gas; a NGL unit configured to receive the dry gas from the dehydration unit and configured to separate the dry gas into a fuel gas and a NGL mix; a first outlet connected to the NGL unit and configured to output the fuel gas to the filter package; and a second outlet connected to the NGL unit and configured to output the NGL mix to the transportation pipeline at a second location situated downstream from the first location. - View Dependent Claims (19, 20)
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10. A method for separating natural gas liquids (NGL) from a feed gas, the method comprising:
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receiving the feed gas; increasing a pressure of the feed gas by running the feed gas through a compressor connected to a as turbine; diverting part of the feed gas from an output of the compressor and feeding the diverted part to a dryer; drying the diverted part to remove water and produce a dry gas; expanding the dry gas in a turbo-expander; separating the expanded gas into the NGL and fuel gas; and providing the fuel gas to the gas turbine as fuel without contamination. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification