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AssigneeAmerican Gas & Technology, Inc.
InventorsAlbert H. Myers, Raymond E. Tate, Jr., Harold M. Lee, Dragos Sfinteanu
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Method for liquifying natural gas comprising regulating the pressure of the natural gas from a pressure ranging from 0-25 psig. Contaminants are filtered out of the regulated natural gas. The natural gas is then compressed to a higher pressure. At least a one-stage heat exchange is performed with the compressed natural gas by utilizing a coolant to provide a cooled compressed natural gas. A Joule Thompson valve is used to liquify at least a portion of the cooled compressed natural gas. The liquified natural gas is stored in a dewar. Unliquified natural gas passing from the dewar is utilized to provide cooling of the natural gas during the heat exchange. The unliquified natural gas is then recompressed. The recompressed natural gas is subjected to the same steps to liquify an additional portion of the recompressed natural gas.
A method for liquifying natural gas from natural gas comprising regulating the pressure of the natural gas from a pressure ranging from 0-25 psig, filtering contaminants out of the regulated natural gas, compressing the natural gas to a higher pressure regulating the higher pressure of the compressed natural gas to a predetermined pressure, filtering the compressed natural gas to remove any remaining foreign matter from the compressed natural gas, performing at least a one-stage heat exchange with the compressed natural gas by utilizing a coolant to provide a cooled compressed natural gas, utilizing a Joule Thompson valve to liquify at least a portion of the cooled compressed natural gas, storing the liquified natural gas in a dewar, utilizing the unliquified natural gas passing from the dewar to provide cooling of the natural gas during at least one heat exchange and thereafter recompressing the unliquified natural gas and subjecting the recompressed natural gas to the same steps to liquify an additional portion of the recompressed natural gas.
An apparatus for liquifying natural gas from a source of natural gas, a regulator for receiving the natural gas and supplying an output pressure ranging from 0-25 psig, a filter for filtering foreign contaminants from the natural gas, a compressor for compressing the filtered natural gas to a desired higher pressure, a regulator for regulating the pressure of compressed natural gas, a filter for filtering the regulated compressed natural gas for removing any remaining foreign matter, a heat exchanger for receiving the compressed natural gas and for cooling the compressed natural gas, a Joule Thompson expansion valve for receiving the cooled compressed natural gas and expanding the cooled compressed natural gas for liquifying at least a portion of the cooled compressed natural gas, a dewar for storing the liquified natural gas discharged from the expansion valve, means connected to the dewar for receiving unliquified natural gas and for passing it through the heat exchanger for providing cooling to the compressed natural gas in the heat exchanger, and piping means connected to the main heat exchanger for taking the unliquified natural gas from the heat exchanger and supplying it to the compressor for recompression.
Dependencies are inferred from the claim text.