摘要:
The power required to recover C 3+ hydrocarbons from crude carbon dioxide comprising C 1+ hydrocarbons and hydrogen sulfide may be reduced by distilling the crude carbon dioxide to produce carbon dioxide-enriched overhead vapor and C 3+ hydrocarbon-enriched bottoms liquid such that the hydrogen sulfide is rejected with the overhead vapor. Power consumption reductions may be achieved by incorporating a heat pump cycle using carbon dioxide vapor as working fluid to provide at least a part of the refrigeration duty and using a side reboiler to reduce the bottom reboiler duty. Where the bottoms liquid is further processed to produce "lighter" and "heavier" hydrocarbon fractions, the process enables optimization of upgrading crude oil on the basis of API gravity, Reid Vapor pressure and/or viscosity.
摘要:
In order to avoid fouling (precipitation of solid matter on cold surfaces) in heat-exchangers down-stream of the gas outlet of a Fischer-Tropsch reactor, the reactor gas stream containing hydrocarbon products that are solid at lower temperatures is fed into a liquid wash tank. Condensation of heavy oil in the liquid wash tank is effected by feeding an evaporable light oil into the liquid wash tank. Heavy oil is recovered as a bottom product from the liquid wash tank while a gaseous product is taken out of the liquid wash tank as the top product. The light oil is obtained from the wash tank top product.
摘要:
A process and an apparatus are disclosed for a compact processing assembly to remove C5 and heavier hydrocarbon components from a hydrocarbon gas stream. The hydrocarbon gas stream is expanded to lower pressure and supplied to the processing assembly between an absorbing means and a mass transfer means. A distillation vapor stream is collected from the upper region of the absorbing means and cooled in a first heat and mass transfer means inside the processing assembly to partially condense it, forming a residual vapor stream and a condensed stream. The condensed stream is supplied to the absorbing means at its top feed point. A distillation liquid stream is collected from the lower region of the mass transfer means and directed into a second heat and mass transfer means inside the processing assembly to heat it and strip out its volatile components.
摘要:
Systems and methods are provided for sidestream mixing. The system may include a first junction formed from a plurality of conduits. The plurality of conduits may include a first conduit fluidly coupled to a compressor, the first conduit forming a first conduit diameter and configured to flow therethrough a first process fluid stream of a plurality of process fluid streams. The plurality of conduits may also include a second conduit fluidly coupled to the first conduit and the compressor, and configured to flow therethrough a second process fluid stream of the plurality of process fluid streams. The first junction may be disposed a first distance at least three times the first conduit diameter upstream of the compressor, such that the first process fluid stream and the second process fluid stream are mixed and form a first combined process fluid stream prior to being fed into and pressurized in the compressor.
摘要:
A compressed vaporous discharge stream is de-superheated in a de-superheater system. The de-superheater system comprises a de-superheater heat exchanger configured to bring at least a portion of the compressed vaporous discharge stream in indirect heat exchanging contact with an ambient stream. A de-superheater bypass line comprising an temperature-controlled valve is configured to selectively bypass the de-superheater heat exchanger. A combiner is configured downstream of the de-superheater heat exchanger for rejoining the bypass portion with the portion of the compressed vaporous discharge stream that has passed through the de-superheater heat exchanger. A mixer is configured downstream of said combiner, to receive and mix the rejoined stream, and discharge the rejoined stream into a de-superheater discharge conduit as a de-superheated stream.
摘要:
The power required to recover C 3+ hydrocarbons from crude carbon dioxide comprising C 1+ hydrocarbons and hydrogen sulfide may be reduced by distilling the crude carbon dioxide to produce carbon dioxide-enriched overhead vapor and C 3+ hydrocarbon-enriched bottoms liquid such that the hydrogen sulfide is rejected with the overhead vapor. Power consumption reductions may be achieved by incorporating a heat pump cycle using carbon dioxide vapor as working fluid to provide at least a part of the refrigeration duty and using a side reboiler to reduce the bottom reboiler duty. Where the bottoms liquid is further processed to produce "lighter" and "heavier" hydrocarbon fractions, the process enables optimization of upgrading crude oil on the basis of API gravity, Reid Vapor pressure and/or viscosity.
摘要:
A plant for treating fluid products obtained from an oil well, to produce a hydrocarbon product, comprises a series of separators at progressively lower pressures, to which the fluid products are supplied in succession. A high pressure gas phase is obtained from the separator and is supplied to a flow restrictor so as to undergo cooling through the Joule Thomson effect, and then passed to a NGL separator to produce a natural gas liquid stream and a gaseous natural gas stream. The natural gas stream is then processed chemically, using a synthesis gas production unit, and a Fischer-Tropsch synthesis unit to produce a synthetic crude oil. The synthetic crude oil is supplied to one of the separators, and the natural gas liquid stream is supplied to another of the separators; the pressure in the one separator is greater than the pressure in the other separator.
摘要:
The present invention relates to a process and apparatus for depleting carbon dioxide content in a natural gas feedstream containing ethane and C3+ hydrocarbons to an amount at or near sales gas specification and separating the C3+ hydrocarbons therefrom. The process involves cooling the natural gas feed stream under a first set of temperature and pressure conditions arranged to produce a liquid stream of carbon dioxide, ethane and C3+ hydrocarbons and a gas stream having a reduced carbon dioxide concentration. The liquid stream is separated from the gas stream, and C3+ hydrocarbons may be separated therefrom. The gas stream is then cooled under a second set of temperature and pressure conditions arranged to produce a sweetened natural gas stream and a second liquid containing liquid carbon dioxide and/or carbon dioxide solids. The sweetened natural gas stream is separated from the second liquid. The process is particularly effective for a natural gas feedstream with a carbon dioxide content > 20% and a combined ethane and C3+ content > 5%, and is able to reduce the carbon dioxide content to