Abstract:
The present invention relates to a method of liquefying a natural gas stream, wherein the natural gas stream (10) is provided at a pressure of 30-80 bar, expanded to a pressure
Abstract:
Method of treating liquefied natural gas (1) to obtain a liquid stream (21) having a reduced content of components having low boiling points comprising expanding (3) the liquefied gas to expand to obtain expanded two-phase fluid; introducing the two-phase fluid into a column (10) below a single gas-liquid contacting section (14); withdrawing from the bottom (16) a liquid stream (17) having a reduced content of components having low boiling points; withdrawing from the top (23) of the column (10) a gaseous stream (25) enriched in components having low boiling points; heating the gaseous stream in a heat exchanger (27); compressing (30) the stream to fuel gas pressure to obtain fuel gas (33); separating a recycle stream (34a) from the fuel gas; at least partly condensing (27) the recycle stream to obtain a reflux steam (34b); and introducing the reflux stream (34b) into the column (10) above the single contacting section (14).
Abstract:
A method for receiving fluid from a natural gas pipeline, the fluid comprising gaseous hydrocarbons, liquid hydrocarbons, water and optionally solids, the method comprising: (a) in a slug catcher (10), receiving the fluid comprising gaseous hydrocarbons, liquid hydrocarbons, water and optionally solids from at least one pipeline (20a, 20b, 20c) ( b) in the slug catcher (10) , separating at least a portion of the gaseous hydrocarbons from the rest of the fluid to leave a liquid mixture or a liquid/ solid mixture; (c) directing at least a portion of the liquid mixture or liquid/solid mixture to a separation vessel (14), preferably a three-phase separation vessel; and (d) in the event of a surge of liquids and optionally solids to the slug catcher (10), directing at least a portion of the liquid mixture or the liquid/solid mixture from the slug catcher (10) to a surge vessel (12).
Abstract:
Plant and method for liquefying natural gas. The plant comprises a common pre-cooling heat exchanger train (1), two natural gas liquids extraction units (100, 100') and two main heat exchangers (200, 200') to cool the overhead light fraction from its corresponding natural gas liquids extraction unit to liquefaction.
Abstract:
The present invention relates to a method of liquefying a natural gas stream, wherein the natural gas stream (10) is provided at a pressure of 10-80 bar, supplied to a gas/liquid separator (31), and separated into a vaporous stream (40) and a liquid stream (30). The vaporous stream (40) is compressed to a pressure of at least 70, 84 bar heat exchanged against the vaporous stream (40), and liquefied to obtain a liquefied natural gas stream (100).
Abstract:
Plant and method for liquefying natural gas. The plant comprises a pre-cooling heat exchanger train (1) having an inlet (13) for natural gas and an outlet (14) for pre-cooled natural gas, a distributor (4) having an inlet (18) connected to the outlet (14) for pre-cooled natural gas and having two distributor outlets (22,23). The plant further comprises two natural gas liquids extraction units having an extraction unit inlet, a heavy fraction outlet and an overhead light fraction outlet, and two main heat exchangers (5,5') to cool the overhead light fraction from its corresponding natural gas liquids extraction unit to liquefaction.
Abstract:
A wet hydrocarbon stream (510) comprising at least methane and water, provided at a temperature equal to a first temperature, is cooled thereby lowering the temperature to a second temperature. In a water removal device (525) at least one wet disposal stream (590) comprising water is withdrawn from the wet hydrocarbon stream, at the second temperature. An effluent stream (560), comprising the wet hydrocarbon stream from which the at least one wet disposal stream (590) has been removed, is discharged from the water removal device (525) and passed to a further heat exchanger (535). At least one refrigerant stream (210) is also passed to the further heat exchanger (535), and both the effluent stream (560) and the refrigerant stream (210) are cooled in the further heat exchanger (535) by indirect heat exchanging against an evaporating refrigerant fraction (230). The effluent stream (560) is heated by indirectly heat exchanging against the wet hydrocarbon stream (510), wherein said cooling of the wet hydrocarbon stream (510) comprises this indirectly heat exchanging.
Abstract:
A wet hydrocarbon stream (510) comprising at least methane and water, provided at a temperature equal to a first temperature, is cooled thereby lowering the temperature to a second temperature. In a water removal device (525) at least one wet disposal stream (590) comprising water is withdrawn from the wet hydrocarbon stream, at the second temperature. An effluent stream (560), comprising the wet hydrocarbon stream from which the at least one wet disposal stream (590) has been removed, is discharged from the water removal device (525) and passed to a further heat exchanger (535). At least one refrigerant stream (210) is also passed to the further heat exchanger (535), and both the effluent stream (560) and the refrigerant stream (210) are cooled in the further heat exchanger (535) by indirect heat exchanging against an evaporating refrigerant fraction (230). The effluent stream (560) is heated by indirectly heat exchanging against the wet hydrocarbon stream (510), wherein said cooling of the wet hydrocarbon stream (510) comprises this indirectly heat exchanging.
Abstract:
Method of treating liquefied natural gas (1) to obtain a liquid stream (21) having a reduced content of components having low boiling points comprising expanding (3) the liquefied gas to expand to obtain expanded two-phase fluid; introducing the two-phase fluid into a column (10') below a gas-liquid contacting section (14); withdrawing from the bottom (16) a liquid stream (17') having a reduced content of components having low boiling points; introducing the stream into a flash vessel (101); withdrawing from the top (23) of the column (10') a gaseous stream (25) enriched in components having low boiling points; heating the gaseous stream in a heat exchanger (27); compressing (30) the stream to fuel gas pressure to obtain fuel gas (33); separating a recycle stream (34a) from the fuel gas; at least partly condensing (27) the recycle stream to obtain a reflux stream (34b); and introducing the reflux stream (34b) into the column (10') above the contacting section (14).