Abstract: A natural-gas purification apparatus includes: a compressor that adjusts the pressure of natural gas; a cooling unit that liquefies and separates a part of natural-gas liquid by cooling the natural gas after the pressure adjustment by the compressor; a heating unit that heats the natural gas after the separation of the part of the natural-gas liquid by the cooling unit; carbon-dioxide separation units that are arranged in series and separate carbon dioxide from the natural gas heated by the heating unit through carbon-dioxide separation membranes; and a thermostatic chamber that adjusts the temperature of at least the carbon-dioxide separation unit disposed at the most downstream side among the carbon-dioxide separation units.

Abstract: A natural-gas purification apparatus includes: a plurality of carbon-dioxide separation units that are arranged in series and separate carbon dioxide, through carbon-dioxide separation membranes, from natural gas pressurized by a compressor, cooled by a cooling unit to liquefy and separate a high-boiling-point hydrocarbon component, and heated by a heating unit; a gas supply pipe that is provided between the plurality of carbon-dioxide separation units through on-off valves and that supplies the natural gas; a compressor that is provided to the gas supply pipe; a cooling unit that liquefies and separates a high-boiling-point hydrocarbon component by cooling the natural gas pressurized by this compressor; and a heating unit that heats the natural gas after the separation of the high-boiling-point hydrocarbon component by this cooling unit.

Abstract: A natural-gas purification apparatus includes: a compressor that adjusts the pressure of natural gas from the ground; a cooling unit that liquefies and separates a part of natural-gas liquid by cooling the natural gas after the pressure adjustment by the compressor; a heating unit that heats the natural gas after the separation of the part; a carbon-dioxide separation unit that separates carbon dioxide from the natural gas heated by the heating unit; and an arithmetic control device that adjusts and controls at least one of the compressor, the cooling unit, and the heating unit to a value which has been set in advance according to the composition of the natural gas, such that the cooling unit will liquefy and separate the part of the natural-gas liquid in the natural gas and the carbon-dioxide separator maintains the remaining part of the natural-gas liquid in the natural gas in gaseous form.

Abstract: A natural-gas purification apparatus includes: a compressor that adjusts the pressure of natural gas, and a separation device that separates natural-gas liquid and carbon dioxide from the natural gas after the pressure adjustment by the compressor through a natural-gas-liquid separation membrane and a carbon-dioxide separation membrane.

Abstract: A natural-gas purification apparatus includes: a compressor; a cooling unit that liquefies and separates a part of natural-gas liquid; a heating unit; first to third carbon-dioxide separation units that separate carbon dioxide through carbon-dioxide separation membranes; a detection carbon-dioxide separation unit that further separates carbon dioxide through a carbon-dioxide separation membrane; a carbon-dioxide-flow-rate sensor that detects the amount of carbon dioxide separated by the detection carbon-dioxide separation unit; an arithmetic control device that adjusts and controls at least one of the pressure to be applied by the compressor, the cooling temperature of the cooling unit, and the heating temperature of the heat unit based on information from the carbon-dioxide-flow-rate sensor such that the amount of carbon dioxide to be separated by the detection carbon-dioxide separation unit will be higher than or equal to a prescribed amount.

Abstract: A natural-gas purification apparatus includes: a plurality of carbon-dioxide separation units that are arranged in series and separate carbon dioxide, through carbon-dioxide separation membranes, from natural gas pressurized by a compressor, cooled by a cooling unit to liquefy and separate a high-boiling-point hydrocarbon component, and heated by a heating unit; a gas supply pipe that is provided between the plurality of carbon-dioxide separation units through on-off valves and that supplies the natural gas; a compressor that is provided to the gas supply pipe; a cooling unit that liquefies and separates a high-boiling-point hydrocarbon component by cooling the natural gas pressurized by this compressor; and a heating unit that heats the natural gas after the separation of the high-boiling-point hydrocarbon component by this cooling unit.

Abstract: A natural-gas purification apparatus includes: a compressor that adjusts the pressure of natural gas from the ground; a cooling unit that liquefies and separates a part of natural-gas liquid by cooling the natural gas after the pressure adjustment by the compressor; a heating unit that heats the natural gas after the separation of the part; a carbon-dioxide separation unit that separates carbon dioxide from the natural gas heated by the heating unit; and an arithmetic control device that adjusts and controls at least one of the compressor, the cooling unit, and the heating unit to a value which has been set in advance according to the composition of the natural gas, such that the cooling unit will liquefy and separate the part of the natural-gas liquid in the natural gas and the carbon-dioxide separator maintains the remaining part of the natural-gas liquid in the natural gas in gaseous form.

Abstract: A natural-gas purification apparatus includes: a compressor that adjusts the pressure of natural gas; a cooling unit that liquefies and separates a part of natural-gas liquid by cooling the natural gas after the pressure adjustment by the compressor; a heating unit that heats the natural gas after the separation of the part of the natural-gas liquid by the cooling unit; carbon-dioxide separation units that are arranged in series and separate carbon dioxide from the natural gas heated by the heating unit through carbon-dioxide separation membranes; and a thermostatic chamber that adjusts the temperature of at least the carbon-dioxide separation unit disposed at the most downstream side among the carbon-dioxide separation units.

Abstract: A natural-gas purification apparatus includes: a compressor that adjusts the pressure of natural gas, and a separation device that separates natural-gas liquid and carbon dioxide from the natural gas after the pressure adjustment by the compressor through a natural-gas-liquid separation membrane and a carbon-dioxide separation membrane.

Abstract: A natural-gas purification apparatus includes: a compressor; a cooling unit that liquefies and separates a part of natural-gas liquid; a heating unit; first to third carbon-dioxide separation units that separate carbon dioxide through carbon-dioxide separation membranes; a detection carbon-dioxide separation unit that further separates carbon dioxide through a carbon-dioxide separation membrane; a carbon-dioxide-flow-rate sensor that detects the amount of carbon dioxide separated by the detection carbon-dioxide separation unit; an arithmetic control device that adjusts and controls at least one of the pressure to be applied by the compressor, the cooling temperature of the cooling unit, and the heating temperature of the heat unit based on information from the carbon-dioxide-flow-rate sensor such that the amount of carbon dioxide to be separated by the detection carbon-dioxide separation unit will be higher than or equal to a prescribed amount.

Abstract: A CO2 recovery system includes an absorption tower that brings gas containing CO2 into contact with a CO2 absorption solution to remove CO2 from the CO2-containing gas; a regeneration tower that regenerates a CO2-absorbed rich solution; and a compression device that re-uses a lean solution, from which CO2 has been removed in the regeneration tower, in the absorption tower and compresses CO2 in gas emitted from the regeneration tower, wherein the rich solution has a high pressure, the high-pressure rich solution is subjected to gas-liquid separation by a flash drum, the rich solution as a liquid component separated in the flash drum is introduced into the regeneration tower, and high-pressure CO2 gas as a gas component separated in the flash drum is introduced into a compression device having a predetermined compression pressure.

Abstract: The system is provided with: a first heat exchanger which is interposed at an intersection between a rich solution supply line and a lean solution supply line, which has absorbed CO2 and H2S extracted from a bottom portion of an absorber, and a regenerated absorbent; a second heat exchanger which is interposed at an intersection between a semi-rich solution supply line and a branch line branched at the branch portion C from the lean solution supply line, and the lean solution; a merging portion which merges a branch line configured to supply the lean solution after heat exchange with the lean solution supply line; and a flow rate adjusting valve which is interposed in the lean solution supply line to adjust the distribution amount of the lean solution.

Abstract: The system includes: an absorber which brings an introduction gas into contact with an absorbent that absorbs CO2 and H2S; an absorbent regenerator which releases CO2 or the like to regenerate the absorbent; a second supply line which returns a regenerated absorbent to the absorber from the regenerator; a third supply line which extracts a semi-rich solution from the vicinity of a middle stage of the absorber, and introduces the semi-rich solution to the vicinity of the middle stage of the regenerator; and a semi-rich solution heat exchanger which is interposed at an intersection between the third supply line and the second supply line to perform the heat exchange between the semi-rich solution and the lean solution.

Abstract: An absorber that uses a gasified gas containing CO2 and H2S formed by gasifying coal, for example, as an introduced gas, and that makes the CO2 and H2S absorbed from the introduced gas by bringing the introduced gas into contact with an absorbent for absorbing C02 and H2S; an absorbent regenerator-that extracts absorbent that has absorbed CO2 and H2S from the bottom of the absorber and introduces the absorbent from the top of the absorber, and that regenerates the absorbent by releasing the CO2 and H2S; a second supply line that returns the regenerated absorbent from the regenerator to the absorber; and a third supply line that extracts the absorbent (semi-rich solution) that has absorbed a part of the CO2 and H2S from the vicinity of the middle of the absorber, and that introduces the semi-rich solution in the vicinity of the middle of the regenerator.

Abstract: Provided is a CO2 recovery system including: a high-pressure absorption tower; a high-pressure regeneration tower that partially regenerates a CO2 absorption solution from the absorption tower through a first liquid feed line; a second liquid feed line that extracts a semi-lean solution having a heat resistance temperature thereof or lower from the high-pressure regeneration tower and introduces a portion of the semi-lean solution into a middle stage of the high-pressure absorption tower; a branch line that introduces a rest of the semi-lean solution into a flash drum; a third liquid feed line that introduces a lean solution after adding pressure thereto into a top of the high-pressure absorption tower; a high-pressure CO2 compression device where high-pressure CO2 gas from the high-pressure regeneration tower is introduced; and a low-pressure CO2 compression device where low-pressure CO2 from the flash drum is introduced.

Abstract: A CO shift reaction apparatus 11 according to the present invention includes: adiabatic reactors 31A to 31C, each having CO shift catalyst layers 35A to 35C filled with a CO shift catalyst 34 which reforms CO in gasification gas 15; gas supply lines l11 to l15 which supply the gasification gas 15 to the adiabatic reactors 31A to 31C; first gas flow rate control units 32A and 32B which adjust the amounts of gas supplied to the adiabatic reactors 31A to 31C; gas discharge lines l21 to l25 which discharge processing gas; and second gas flow rate control unit 33A and 33B which adjust flow rates of processing gas 38A-1, 38A-2, 38B-1, and 38B-2.

Abstract: The system includes: an absorber which brings an introduction gas into contact with an absorbent that absorbs CO2 and H2S; an absorbent regenerator which releases CO2 or the like to regenerate the absorbent; a second supply line which returns a regenerated absorbent to the absorber from the regenerator; a third supply line which extracts a semi-rich solution from the vicinity of a middle stage of the absorber, and introduces the semi-rich solution to the vicinity of the middle stage of the regenerator; and a semi-rich solution heat exchanger which is interposed at an intersection between the third supply line and the second supply line to perform the heat exchange between the semi-rich solution and the lean solution.

Abstract: The system is provided with: a first heat exchanger which is interposed at an intersection between a rich solution supply line and a lean solution supply line, which has absorbed CO2 and H2S extracted from a bottom portion of an absorber, and a regenerated absorbent; a second heat exchanger which is interposed at an intersection between a semi-rich solution supply line and a branch line branched at the branch portion C from the lean solution supply line, and the lean solution; a merging portion which merges a branch line configured to supply the lean solution after heat exchange with the lean solution supply line; and a flow rate adjusting valve which is interposed in the lean solution supply line to adjust the distribution amount of the lean solution.

Abstract: A CO2 recovery system includes an absorption tower that brings gas containing CO2 into contact with a CO2 absorption solution to remove CO2 from the CO2-containing gas; a regeneration tower that regenerates a CO2-absorbed rich solution; and a compression device that re-uses a lean solution, from which CO2 has been removed in the regeneration tower, in the absorption tower and compresses CO2 in gas emitted from the regeneration tower, wherein the rich solution has a high pressure, the high-pressure rich solution is subjected to gas-liquid separation by a flash drum, the rich solution as a liquid component separated in the flash drum is introduced into the regeneration tower, and high-pressure CO2 gas as a gas component separated in the flash drum is introduced into a compression device having a predetermined compression pressure.

Abstract: Provided is a CO2 recovery system including: a high-pressure absorption tower 13 that removes CO2 from high-pressure gas 11; a high-pressure regeneration tower 15 that releases a portion of CO2 from a rich solution 14 introduced from the high-pressure absorption tower to obtain a semi-lean solution 19; a first liquid feed line that feeds the semi-lean solution to the high-pressure absorption tower; a branch line that branches a portion of the semi-lean solution fed from a liquid feed line; and a flash drum 21 that flashes the semi-lean solution.