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Assignees1304338 Alberta Ltd., 1304342 Alberta Ltd.
InventorsJose Lourenco, Mackenzie Millar
Estimating the term…
A method to recover hydrocarbonfractions from refineries gas streams involves a pre-cooled heat refinery fuel gas stream mixed with a pre-cooled and expanded supply of natural gas stream in an inline mixer to condense and recover at least C3+ fractions upstream of a fractionator. The temperature of the gas stream entering the fractionator may be monitored downstream of the in-line mixer. The pre-cooled stream of high pressure natural gas is sufficiently cooled by flowing through a gas expander that, when mixed with the pre-cooled refinery fuel gas, the resulting temperature causes condensation of heavier hydrocarbon fractions before entering the fractionator. A further cooled, pressure expanded natural gas reflux stream is temperature controlled to maintain fractionator overhead temperature. The fractionator bottoms temperature may be controlled by a circulating reboiler stream.
A method of recovering fractions from a refinery fuel gas stream using a stream of high pressure natural gas from a natural gas distribution pipeline as a source of cooling to condense and fractionate at least C3+ fractions from the refinery fuel gas stream, the method comprising the steps of:
A refinery fractions recovery plant for recovering liquid fractions from a refinery fuel gas stream using a supply of high pressure natural gas from a natural gas pipeline as a source of cooling to condense at least C3+ fractions from the refinery fuel gas stream, the refinery fractions recovery plant comprising:
Dependencies are inferred from the claim text.