초록 ▼

Process for the recovery of components heavier than methane from natural gas, wherein the process comprises (a) cooling a natural gas feed to provide a cooled natural gas feed and introducing the cooled natural gas feed into an absorber column at a first location therein; (b) withdrawing from the ab

Process for the recovery of components heavier than methane from natural gas, wherein the process comprises (a) cooling a natural gas feed to provide a cooled natural gas feed and introducing the cooled natural gas feed into an absorber column at a first location therein; (b) withdrawing from the absorber column a first overhead vapor stream depleted in components heavier than methane and a bottoms stream enriched in components heavier than methane; (c) introducing a methane-rich reflux stream at a second location in the absorber column above the first location; (d) separating the bottoms stream into a stream enriched in methane and one or more streams enriched in components heavier than ethane; and (e) introducing an absorber liquid comprising components heavier than ethane into the absorber column at a location between the first location and the second location.

대표청구항 ▼

Process for the recovery of components heavier than methane from natural gas, wherein the process comprises (a) cooling a natural gas feed to provide a cooled natural gas feed and introducing the cooled natural gas feed into an absorber column at a first location therein; (b) withdrawing from the ab

Process for the recovery of components heavier than methane from natural gas, wherein the process comprises (a) cooling a natural gas feed to provide a cooled natural gas feed and introducing the cooled natural gas feed into an absorber column at a first location therein; (b) withdrawing from the absorber column a first overhead vapor stream depleted in components heavier than methane and a bottoms stream enriched in components heavier than methane; (c) introducing a methane-rich reflux stream at a second location in the absorber column above the first location; (d) separating the bottoms stream into a stream enriched in methane and one or more streams enriched in components heavier than ethane; and (e) introducing an absorber liquid comprising components heavier than ethane into the absorber column at a location between the first location and the second location. etermined differential pressure, to thereby change an amount of the refrigerant discharged from the variable displacement compressor, characterized by comprising: first and second valve elements operated in an interlocked fashion for opening and closing a refrigerant passage extending between the discharge chamber and the pressure-regulating chamber and a refrigerant passage extending between the pressure-regulating chamber and the suction chamber, respectively; and a solenoid section for applying a solenoid force corresponding to the predetermined differential pressure to the first and second valve elements. 5. The displacement control valve for a variable displacement compressor, according to claim 4, wherein a central shaft axially movably held by a holder fluidly separating the first valve element and the second valve element from each other and having a smaller pressure-receiving area than the first and second valve elements has opposite ends one of which has the first valve element fixed thereto via a shaft thinner than the central shaft and the other of which has the second valve element in abutment therewith via a shaft thinner than the central shaft, with discharge pressure from the discharge chamber being applied between the first valve element and the central shaft, and suction pressure from the suction chamber being applied between the second valve element and the central shaft, and wherein at the same time, a downstream side of the first valve element and a upstream side of the second valve element are communicated with the pressure-regulating chamber by respective two passages independent of each other. 6. The displacement control valve for a variable displacement compressor, according to claim 5, wherein the solenoid section is arranged toward the first valve element, and a shaft of the solenoid section for applying the solenoid force to the first valve element is in abutment with the first valve element. 7. The displacement control valve for a variable displacement compressor, according to claim 6, wherein the first valve element, the central shaft, and the shafts thinner than the central shaft, which are positioned on the respective opposite ends of the central shaft are integrally formed with each other, the second valve element being held in abutment with an end of the thinner shaft positioned in the opposite side of the first valve element. 8. The displacement control valve for a variable displacement compressor, according to claim 4, wherein the first and second valve elements are arranged opposed to each other on an identical axis in an axially movable fashion, and are integrally formed, respectively, with first and second pistons each having a smaller pressure-receiving area than the first and second valve elements, via first and second shafts axially extending outward from the first and second valve elements, respectively, the displacement control valve including a holder fluidly separating the first valve element and the second valve element from each other and a transmission shaft axially slidably held by the holder and sandwiched between the first valve element and the second valve element, for axially moving the first valve element and the second valve element in an interlocking fashion, with discharge pressure from the discharge chamber being applied between the first valve element and the first piston, and suction pressure from the suction chamber being applied between the second valve element and the second piston, and wherein at the same time, a downstream side of the first valve element and a upstream side of the second valve element are communicated with the pressure-regulating chamber by respective two passages independent of each other. 9. The displacement control valve for a variable displacement compressor, according to claim 8, including a first communication hole formed between a back pressure chamber of the first piston and the downstream side of the first valve element, for intro