WO2021124953A1 - 圧縮機システム - Google Patents
圧縮機システム Download PDFInfo
- Publication number
- WO2021124953A1 WO2021124953A1 PCT/JP2020/045460 JP2020045460W WO2021124953A1 WO 2021124953 A1 WO2021124953 A1 WO 2021124953A1 JP 2020045460 W JP2020045460 W JP 2020045460W WO 2021124953 A1 WO2021124953 A1 WO 2021124953A1
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- WIPO (PCT)
- Prior art keywords
- compressor
- rotor
- flow path
- trains
- control unit
- Prior art date
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- 239000012530 fluid Substances 0.000 claims abstract description 104
- 239000007789 gas Substances 0.000 claims abstract description 52
- 230000006835 compression Effects 0.000 claims abstract description 46
- 238000007906 compression Methods 0.000 claims abstract description 46
- 239000000567 combustion gas Substances 0.000 claims abstract description 16
- 239000000446 fuel Substances 0.000 claims description 26
- MBYLVOKEDDQJDY-UHFFFAOYSA-N tris(2-aminoethyl)amine Chemical compound NCCN(CCN)CCN MBYLVOKEDDQJDY-UHFFFAOYSA-N 0.000 description 81
- 239000003507 refrigerant Substances 0.000 description 43
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 38
- 230000007423 decrease Effects 0.000 description 19
- 239000001294 propane Substances 0.000 description 19
- 238000001816 cooling Methods 0.000 description 15
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/04—Units comprising pumps and their driving means the pump being fluid-driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/02—Arrangement of sensing elements
- F01D17/08—Arrangement of sensing elements responsive to condition of working-fluid, e.g. pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/20—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/04—Gas-turbine plants characterised by the use of combustion products as the working fluid having a turbine driving a compressor
- F02C3/045—Gas-turbine plants characterised by the use of combustion products as the working fluid having a turbine driving a compressor having compressor and turbine passages in a single rotor-module
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/04—Gas-turbine plants characterised by the use of combustion products as the working fluid having a turbine driving a compressor
- F02C3/10—Gas-turbine plants characterised by the use of combustion products as the working fluid having a turbine driving a compressor with another turbine driving an output shaft but not driving the compressor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/009—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by bleeding, by passing or recycling fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/32—Application in turbines in gas turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/70—Application in combination with
- F05D2220/74—Application in combination with a gas turbine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/60—Fluid transfer
- F05D2260/606—Bypassing the fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P30/00—Technologies relating to oil refining and petrochemical industry
- Y02P30/40—Ethylene production
Definitions
- the present disclosure relates to a compressor system.
- the present application claims priority with respect to Japanese Patent Application No. 2019-230295 filed in Japan on December 20, 2019, the contents of which are incorporated herein by reference.
- the compressor system used in LNG plants, etc. is composed of a compressor tray (string) in which a single or multiple compressors are connected to the output shaft of a gas turbine, which is a drive, and is used for compressing fluids.
- this compressor system is used as a refrigeration system for producing LNG.
- One or more such compressor trays are arranged for one plant.
- the compressed refrigerant is sent to the piping or flare and discharged to the outside.
- the refrigerant discharged in this way may have a very high pressure.
- the pipes and flares become large, which increases the cost of installation and maintenance and the installation space.
- a recycling valve (ASV) is installed downstream of the compressor.
- the recycle valve is opened to circulate the compressed fluid, thereby increasing the flow rate through the compressor.
- the load on the compressor is increased, the rotation speed of the compressor is intentionally lowered (Bogdown), and the compressor is stopped.
- the pressure rise of the discharged refrigerant is suppressed, and the size of the installed piping and flare is suppressed.
- the decrease in the number of revolutions of the compressor may occur unintentionally.
- a fluid such as a refrigerant that was supposed to be supplied to the compressor of the stopped compressor Tren is supplied to the compressor of another compressor Tren that is in operation.
- the load on the compressor of the compressor Tren during operation temporarily increases, and the rotation speed of the compressor decreases.
- the rotation speed of the compressor is unintentionally lowered, the amount of air used for combustion in the gas turbine connected to the compressor is reduced, and the output may not be maintained.
- the number of revolutions of the compressor is further reduced, and the compressor tray may eventually stop (trip) in an emergency.
- various devices including the gas turbine and the compressor will be heavily burdened, the production of the plant will be stopped, and a failure may occur.
- the phenomenon that the rotation speed of the compressor unintentionally decreases due to the stoppage of one compressor tray is given as an example above, but the event that the rotation speed of the compressor unintentionally decreases is another factor. It can also be caused by. That is, the phenomenon that the rotation speed of the compressor unintentionally decreases may occur due to various factors.
- the present disclosure provides a compressor system that suppresses the unintentional stop of the compressor Tren and enables stable and continuous operation.
- the compressor system includes a plurality of compressor trains having a multi-axis gas turbine, a compressor including at least one compressor driven by the multi-axis gas turbine, and one fluid.
- the multi-axis gas turbine includes a fluid supply unit having a supply source and distributing and supplying the fluid supplied from the fluid supply source to the compressors in the plurality of compressor trays, respectively.
- a gas turbine compressor having a compressor rotor and compressing air by the rotation of the compressor rotor, a combustor that generates combustion gas by air and fuel compressed by the gas turbine compressor, and the compressor.
- a low-pressure turbine having a low-pressure turbine rotor, and the plurality of compressor trains can be operated in parallel.
- the compressor system 1 includes a plurality of compressor trays 2 (two in the present embodiment), a plurality of fluid supply units 5 (two in the present embodiment), and a control unit 6. Be prepared.
- the case where the compressor system 1 is applied to an LNG plant will be described as an example.
- the plant in which the compressor system 1 is used is not limited to the LNG plant.
- the compressor system 1 can be used in various plants that need to compress the fluid. Therefore, the compressor system 1 may be applied to an ethylene plant that produces ethylene by separating and purifying a raw material such as naphtha.
- the compressor tray 2 has a biaxial gas turbine 3 and a compression unit 4 including at least one compressor.
- the compressor Tren 2 of the present embodiment compresses a plurality of fluids by a plurality of compressors driven by one gas turbine 3 which is a driving machine.
- the plurality of compressors Tren 2 can be operated in parallel.
- parallel operation means that they are operated at the same time.
- the plurality of compressor trains 2 may be operated under the same operating conditions or under different operating conditions.
- the compressor system 1 of the present embodiment has two compressor trays 2 of a first compressor tray 2A and a second compressor tray 2B. In the present embodiment, the first compressor tray 2A and the second compressor tray 2B have the same configuration.
- the biaxial gas turbine 3 generates a rotational driving force for driving the compressor of the compression unit 4.
- the biaxial gas turbine 3 includes a gas turbine compressor 31, a combustor 32, a high pressure turbine 34, and a low pressure turbine 35. Further, the gas turbine 3 as a driving machine is intended for a multi-shaft type (two-shaft type in this embodiment), and is not limited to the two-shaft machine shown in FIG.
- the gas turbine compressor 31 compresses air to generate compressed air.
- the gas turbine compressor 31 has a compressor rotor 311 that rotates about the first axis O1.
- a motor (not shown) is connected to the compressor rotor 311 as a starter used at the time of starting.
- the gas turbine compressor 31 compresses the air taken in from the outside by the rotation of the compressor rotor 311 to generate compressed air, which is supplied to the combustor 32.
- the combustor 32 generates combustion gas from the air compressed by the gas turbine compressor 31 and the fuel.
- the combustion gas generated by the combustor 32 is supplied to the high-pressure turbine 34.
- a fuel supply path LF1 which is a pipe connected to a fuel supply source is connected to the combustor 32.
- a fuel supply valve VF1 is arranged in the fuel supply path LF1.
- the high-pressure turbine 34 has a high-pressure turbine rotor 312 that rotates about the first axis O1.
- the high-pressure turbine rotor 312 is rotationally driven by the combustion gas generated by the combustor 32. Therefore, the high-pressure turbine 34 is driven by the combustion gas supplied from the combustor 32.
- the high pressure turbine rotor 312 is mechanically connected to the compressor rotor 311. Both the compressor rotor 311 and the high-pressure turbine rotor 312 have a columnar shape centered on the first axis O1.
- the compressor rotor 311 and the high-pressure turbine rotor 312 are connected to each other to form the first rotor 10.
- the low-pressure turbine 35 has a low-pressure turbine rotor 313 that rotates about the second axis O2.
- the second axis O2 extends coaxially and parallel to the first axis O1.
- the low-pressure turbine rotor 313 is rotationally driven by the combustion gas after the high-pressure turbine rotor 312 is rotationally driven. Therefore, the low pressure turbine 35 is driven by the combustion gas which is the exhaust gas from the high pressure turbine 34.
- the low-pressure turbine rotor 313 is arranged apart from the high-pressure turbine rotor 312 in the extending direction of the first axis O1 and the second axis O2.
- the low-pressure turbine rotor 313 is mechanically connected to the rotor of the compression unit 4, which will be described later, to form the second rotor 20.
- the gas turbine 3 is a so-called biaxial type in which the first rotor 10 and the second rotor 20 are not directly connected. Therefore, the second rotor 20 can rotate independently of the rotation of the first rotor 10. With such a structure, the twin-screw gas turbine 3 can adjust the rotation speed of the second rotor 20 according to the load while rotating and operating the first rotor 10 under the optimum conditions.
- the compression unit 4 compresses the fluid supplied by the biaxial gas turbine 3.
- the compression unit 4 of the present embodiment compresses the refrigerant of the refrigerator used for liquefying natural gas, for example, in an LNG plant.
- the compression unit 4 of the present embodiment has three compressors, a first compressor 41, a second compressor 42, and a third compressor 43.
- the first compressor 41 is a centrifugal compressor that compresses propane as an example of a fluid.
- the first compressor 41 has a first compression unit rotor 411 that rotates about the second axis O2.
- the first compression section rotor 411 is mechanically connected to the low pressure turbine rotor 313. That is, the first compression unit rotor 411 constitutes a part of the second rotor 20.
- the first compressor 41 compresses propane by the rotation of the first compression unit rotor 411 to generate a compressed gas.
- the propane compressed by the first compressor 41 is sent to other equipment of the plant.
- the first compressor 41 is connected to the first inlet flow path LI1 connected to one of the fluid supply units 5 described later and the first intermediate flow path LM1.
- the first inlet flow path LI1 and the first intermediate flow path LM1 are pipes for supplying propane supplied from the first fluid supply unit 5A, which is the fluid supply unit 5, into the inside of the first compressor 41.
- the first inlet flow path LI1 is connected to the suction port of the first compressor 41.
- a first inlet valve VI1 is arranged in the first inlet flow path LI1. By adjusting the opening degree of the first inlet valve VI1, it is possible to change the flow rate of propane flowing through the first inlet flow path LI1.
- the first inlet valve VI1 controls the opening degree of the first inlet valve VI1, the amount of propane supplied from the first fluid supply unit 5A to the suction port of the first compressor 41 .
- the first intermediate flow path LM1 is connected to the intermediate stage of the first compressor 41 located downstream of the suction port of the first compressor 41.
- the first intermediate valve VM1 is arranged in the first intermediate flow path LM1.
- the opening degree of the first intermediate valve VM1 it is possible to change the flow rate of propane flowing through the first intermediate flow path LM1. Therefore, by adjusting the opening degree of the first intermediate valve VM1, the amount of propane supplied from the first fluid supply unit 5A to the intermediate stage of the first compressor 41 is adjusted. That is, the first inlet valve VI1 and the first intermediate valve VM1 are so-called suction valves.
- the second compressor 42 is a centrifugal compressor that compresses a mixed refrigerant containing nitrogen, methane, propane, etc. as an example of a fluid.
- the second compressor 42 has a second compression unit rotor 421 that rotates about the second axis O2.
- the second compression section rotor 421 is mechanically connected to the first compression section rotor 411. That is, the second compression rotor 421 constitutes a part of the second rotor 20.
- the second compressor 42 is arranged at a position opposite to that of the gas turbine 3 with respect to the first compressor 41 in the extending direction of the second axis O2.
- the second compressor 42 compresses the mixed refrigerant by the rotation of the second compression unit rotor 421 to generate a compressed gas.
- the second compressor 42 is connected to a second inlet flow path LI2 connected to one of the fluid supply units 5 described later.
- the second inlet flow path LI2 is a pipe that supplies the mixed refrigerant supplied from the second fluid supply unit 5B, which is the fluid supply unit 5, into the inside of the second compressor 42.
- the second inlet flow path LI2 is connected to the suction port of the second compressor 42.
- a second inlet valve VI2 and a pressure sensor P (pressure value acquisition unit) are arranged in the second inlet flow path LI2.
- the pressure sensor P acquires the value of the pressure at the suction port of the second compressor 42.
- the pressure sensor P sends the acquired pressure value information to the control unit 6, which will be described later.
- the third compressor 43 is a centrifugal compressor that compresses the mixed refrigerant compressed by the second compressor 42.
- the third compressor 43 has a third compression unit rotor 431 that rotates about the second axis O2.
- the third compression section rotor 431 is mechanically connected to the second compression section rotor 421. That is, the third compression section rotor 431 constitutes a part of the second rotor 20.
- the third compressor 43 is arranged at a position opposite to that of the first compressor 41 with respect to the second compressor 42 in the direction in which the second axis O2 extends.
- the third compressor 43 further compresses the mixed refrigerant by the rotation of the third compression unit rotor 431 to generate a compressed gas.
- the third compressor 43 is connected to the third inlet flow path LI3 that connects the discharge port of the second compressor 42 and the suction port of the third compressor 43.
- the third inlet flow path LI3 is a pipe that supplies the mixed refrigerant compressed by the second compressor 42 to the inside of the third compressor 43.
- a first cooling unit C1 for cooling the mixed refrigerant compressed by the second compressor 42 is arranged in the third inlet flow path LI3. Therefore, the mixed refrigerant compressed by the second compressor 42 by passing through the third inlet flow path LI3 is cooled by the first cooling unit C1 and supplied to the third compressor 43.
- the third compressor 43 is connected to a third outlet flow path LO3 that is compressed by the third compressor 43 and allows the mixed refrigerant discharged from the discharge port of the third compressor 43 to flow.
- a second cooling unit C2 for cooling the mixed refrigerant compressed by the third compressor 43 is arranged in the third outlet flow path LO3. Therefore, by passing through the third outlet flow path LO3, the mixed refrigerant compressed by the third compressor 43 is cooled by the second cooling unit C2 and sent to other equipment of the plant.
- the second compressor 42 has a bypass flow path connecting the suction port and the discharge port so as to return the mixed refrigerant discharged from the discharge port of the second compressor 42 to the suction port of the second compressor 42. It is connected.
- the compression unit 4 of the present embodiment has, as a bypass flow path, a first bypass flow path LB1 for returning the mixed refrigerant before being cooled by the first cooling unit C1 to the suction port of the second compressor 42, and a first cooling unit. It has a second bypass flow path LB2 that returns the mixed refrigerant cooled by C1 to the suction port of the second compressor 42.
- the first bypass flow path LB1 is located upstream of the first cooling unit C1 in the third inlet flow path LI3, downstream of the second inlet valve VI2 in the second inlet flow path LI2, and upstream of the pressure sensor P. It is connected to the position. Therefore, the mixed refrigerant that has not been compressed and cooled by the second compressor 42 flows through the first bypass flow path LB1. That is, the first bypass flow path LB1 is a so-called hot gas bypass flow path.
- a first bypass valve VB1 is arranged in the first bypass flow path LB1. By adjusting the opening degree of the first bypass valve VB1, it is possible to change the flow rate of the mixed refrigerant flowing through the first bypass flow path LB1. Therefore, by adjusting the opening degree of the first bypass valve VB1, the amount of the mixed refrigerant supplied from the third inlet flow path LI3 to the suction port of the second compressor 42 is adjusted.
- the second bypass flow path LB2 is located downstream of the first cooling unit C1 in the third inlet flow path LI3, downstream of the second inlet valve VI2 in the second inlet flow path LI2, and upstream of the pressure sensor P. It is connected to the position. Therefore, the mixed refrigerant that has been compressed and cooled by the second compressor 42 flows through the second bypass flow path LB2.
- a second bypass valve VB2 is arranged in the second bypass flow path LB2.
- the third compressor 43 also has a bypass flow path connecting the suction port and the discharge port so that the mixed refrigerant discharged from the discharge port of the third compressor 43 is returned to the suction port of the third compressor 43. It is connected.
- the compression unit 4 of the present embodiment further has a third bypass flow path LB3 as a bypass flow path that returns the mixed refrigerant cooled by the second cooling unit C2 to the suction port of the third compressor 43. ..
- the third bypass flow path LB3 connects a position downstream of the second cooling section C2 in the third outlet flow path LO3 and a position downstream of the first cooling section C1 in the third inlet flow path LI3. .. Therefore, the mixed refrigerant that has been compressed and cooled by the third compressor 43 flows through the third bypass flow path LB3.
- a third bypass valve VB3 is arranged in the third bypass flow path LB3. By adjusting the opening degree of the third bypass valve VB3, it is possible to change the flow rate of the mixed refrigerant flowing through the third bypass flow path LB3. Therefore, by adjusting the opening degree of the third bypass valve VB3, the amount of the mixed refrigerant supplied from the third outlet flow path LO3 to the suction port of the third compressor 43 is adjusted.
- the first compressor 41, the second compressor 42, and the third compressor 43 are connected in series in the direction extending the second axis O2.
- the first compressor 41, the second compressor 42, and the third compressor 43 are driven by the rotation of the second rotor 20.
- the fluid supply unit 5 has one fluid supply source.
- the fluid supply unit 5 can distribute and supply the fluid supplied from the fluid supply source to the compressors in the plurality of compressors Tren 2.
- the compressor system 1 of the present embodiment includes a first fluid supply unit 5A and a second fluid supply unit 5B as the fluid supply unit 5.
- the first fluid supply unit 5A of the present embodiment supplies propane as a fluid to the first compressor 41.
- the first fluid supply unit 5A has a first fluid supply source 511, a first supply path 512, and a first branch path 513.
- the first fluid supply source 511 is a propane supply source.
- the fluid supply source in the first fluid supply unit 5A is only the first fluid supply source 511.
- the first supply path 512 is a pipe that supplies propane from the first fluid supply source 511 to the first compressor 41 of the first compressor Tren 2A.
- the first supply path 512 connects the first fluid supply source 511 with the first inlet flow path LI1 and the first intermediate flow path LM1 of the first compressor Tren 2A.
- the first branch path 513 is a pipe that distributes and supplies propane from the first fluid supply source 511 to the first compressor 41 of the second compressor Tren 2B.
- the first branch path 513 connects the first supply path 512 with the first inlet flow path LI1 and the first intermediate flow path LM1 of the second compressor Tren 2B.
- the second fluid supply unit 5B is independent of the first fluid supply unit 5A, and can supply a fluid different from that of the first fluid supply unit 5A under different conditions.
- the second fluid supply unit 5B of the present embodiment supplies the mixed refrigerant as a fluid to the second compressor 42.
- the second fluid supply unit 5B has a second fluid supply source 521, a second supply path 522, and a second branch path 523.
- the second fluid supply source 521 is a supply source of the mixed refrigerant.
- the fluid supply source in the second fluid supply unit 5B is only the second fluid supply source 521.
- the second supply path 522 is a pipe that supplies the mixed refrigerant of the second fluid supply source 521 to the second compressor 42 of the first compressor Tren 2A.
- the second supply path 522 connects the second fluid supply source 521 and the second inlet flow path LI2 of the first compressor Tren 2A.
- the second branch passage 523 is a pipe that distributes and supplies the mixed refrigerant of the second fluid supply source 521 to the second compressor 42 of the second compressor Tren 2B.
- the second branch path 523 connects the second supply path 522 and the second inlet flow path LI2 of the second compressor Tren 2B.
- the control unit 6 can control the operating conditions of the plurality of compressor trains 2.
- the control unit 6 of the present embodiment can independently and simultaneously control the first compressor tray 2A and the second compressor tray 2B.
- the control unit 6 can control the biaxial gas turbine 3 and the compression unit 4 for each compressor tray 2.
- the control unit 6 monitors the operating state of the compressor tray 2 and sends an instruction to each valve. As a result, when one of the plurality of compressor trays 2 is stopped, the control unit 6 determines the flow rate of the fluid supplied to at least one compressor with respect to the other compressor trays 2 that are not stopped.
- control unit 6 may send an instruction to perform all four described above, or may send an instruction to perform only one of the above.
- the control unit 6 of the present embodiment includes an input unit 61, a determination unit 62, a first output unit 63, a second output unit 64, a third output unit 65, and a fourth output unit 66. ing.
- Information on the operating state of the first compressor Tren 2A and the second compressor Tren 2B is input to the input unit 61.
- the operating state information of the first compressor Tren 2A and the second compressor Tren 2B is the information of the stop signal from the first compressor Tren 2A and the second compressor Tren 2B and the pressure acquired by the pressure sensor P. Information.
- the determination unit 62 stops the first compressor Tren 2A and the second compressor Tren 2B based on the information of the stop signals of the first compressor Tren 2A and the second compressor Tren 2B input to the input unit 61. Determine if it is. When it is determined that either the first compressor Tren 2A or the second compressor Tren 2B is stopped, information on which compressor Tren 2 is stopped is sent to the first output unit 63 and the second. Output to the output unit 64 and the third output unit 65.
- the determination unit 62 determines whether or not the pressure value exceeds a predetermined reference value.
- the reference value is a value at which it is determined that an abnormality has occurred due to an excessive load on the second compressor 42.
- the reference value of the present embodiment is, for example, a value that can be determined to be clearly higher than the pressure when the second compressor 42 is in steady operation.
- information on which compressor Tren 2 the pressure of the second compressor 42 is abnormal is output to the fourth output unit 66.
- the determination unit 62 determines that the second compressor Tren 2B has stopped or an abnormality has occurred in the second compressor 42 of the second compressor Tren 2B
- the first output unit 63, the second output unit 64, and the second An instruction is sent to the third output unit 65 and the fourth output unit 66 so that the first compressor Tren 2A is the instruction target.
- the first output unit 63 refers to at least one of the first bypass valve VB1, the second bypass valve VB2, and the third bypass valve VB3 of the first compressor Tren 2A based on the signal sent from the determination unit 62. And send instructions to open. As a result, the amount of the mixed refrigerant returned to at least one suction port of the second compressor 42 and the third compressor 43 increases.
- the second output unit 64 instructs at least one of the first inlet valve VI1 and the first intermediate valve VM1 of the first compressor Tren 2A to narrow. send. As a result, the flow rate of propane supplied to the first compressor 41 can be reduced.
- the third output unit 65 sends an instruction to the fuel supply valve VF1 of the first compressor Tren 2A to widen the opening degree based on the signal sent from the determination unit 62.
- the fuel supplied to the combustor 32 is increased, the energy applied to the high-pressure turbine rotor 312 is increased, and the rotation speed of the low-pressure turbine rotor 313 is increased.
- the fourth output unit 66 sends an instruction to the fuel supply valve VF1 of the first compressor Tren 2A to widen the opening degree based on the signal sent from the determination unit 62.
- the opening degree of the fuel supply valve VF1 is adjusted so that the value of the pressure acquired by the pressure sensor P is lowered and becomes constant.
- the fuel supplied to the combustor 32 is increased, the energy applied to the high-pressure turbine rotor 312 is increased, and the rotation speed of the low-pressure turbine rotor 313 is increased.
- the first output unit 63, the second output unit 64, the third output unit 65, and the fourth output unit 66 perform the same processing.
- the twin-screw gas turbine 3 is applied to all the compressor trains 2. Therefore, the first rotor 10 and the second rotor 20 connected from the first compressor 41 to the third compressor 43 can be operated at different rotation speeds. That is, the speed can be adjusted in a wider operating range. Therefore, it is possible to prevent the compressor Tren 2 from stopping unintentionally, and the operation can be continued stably.
- the biaxial gas turbine 3 it is possible to reduce the safety valves and recycling valves that are effective for suppressing the load fluctuation of the compressor, and it is possible to suppress the cost as the compressor system 1. Further, the load fluctuation of the compressor can be dealt with in a wide operating range of the biaxial gas turbine 3. Therefore, the frequency of simulation for verifying the load fluctuation can be suppressed at the time of designing the compressor system 1, and the design work can be simplified.
- the control unit 6 opens the first bypass valve VB1, the second bypass valve VB2, and the third bypass valve VB3. Instructions are sent.
- the first bypass valve VB1 or the second bypass valve VB2 is opened, the amount of the compressed mixed refrigerant supplied to the suction port of the second compressor 42 increases.
- the third bypass valve VB3 is opened, the amount of the compressed mixed refrigerant supplied to the suction port of the third compressor 43 increases. That is, the amount of the mixed refrigerant returned to the second compressor 42 and the third compressor 43 increases, and the amount of the newly supplied mixed refrigerant can be suppressed.
- the increase in the load on the second compressor 42 and the third compressor 43 can be suppressed.
- the rate of decrease in the rotation speed of the second rotor 20 caused by the second compressor 42 and the third compressor 43 can be alleviated.
- the control unit 6 uses feedforward control to load the second compressor 42 and the third compressor 43. Can be lowered quickly.
- control unit 6 controls to open any one of the first bypass valve VB1, the second bypass valve VB2, and the third bypass valve VB3.
- the amount of the mixed refrigerant returned to the suction port of the second compressor 42 or the third compressor 43 in operation can be easily increased in response to the stoppage of the compressor tray 2.
- the control unit 6 sends an instruction to widen the fuel supply valve VF1.
- the amount of fuel supplied to the combustor 32 is increased, so that the energy applied to the high-pressure turbine rotor 312 is increased.
- the rotation speed of the low-pressure turbine rotor 313 also increases, and the decrease in the rotation speed of the second rotor 20 can be suppressed.
- the rate of decrease in the rotation speed of the second rotor 20 can be alleviated. As a result, it is possible to prevent the compressor Tren 2 operating normally from stopping unintentionally.
- the control unit 6 is instructed to narrow either the first inlet valve VI1 or the first intermediate valve VM1. Sent.
- the amount of propane supplied to the inside of the first compressor 41 is reduced. Therefore, the amount of propane compressed by the first compressor 41 is reduced, and the increase in the load on the first compressor 41 is suppressed.
- the rate of decrease in the rotation speed of the second rotor 20 caused by the first compressor 41 can be alleviated. As a result, it is possible to prevent the compressor Tren 2 operating normally from stopping unintentionally.
- control unit 6 controls to narrow either the first inlet valve VI1 or the first intermediate valve VM1. As a result, the amount of propane supplied to the operating first compressor 41 can be easily reduced in response to the stoppage of the compressor Tren 2.
- the opening degree of the first inlet valve VI1 and the first intermediate valve VM1 is not limited to the adjustment.
- the operator may send an instruction to the first compressor 41 via the control unit 6 to reduce the flow rate of propane discharged from the discharge port of the first compressor 41. That is, an instruction may be sent to lower the required value of the production amount of LNG in the LNG plant.
- the control unit 6 expands the fuel supply valve VF1. Instructions are sent to.
- the rotation speed of the second rotor 20 of the compressor Tren 2 that is operating normally decreases, so that each compressor Suction pressure rises.
- the pressure information acquired by the pressure sensor P shows a higher value than usual.
- opening the fuel supply valve VF1 increases the fuel supplied to the combustor 32, increases the energy applied to the high-pressure turbine rotor 312, and increases the rotation speed of the low-pressure turbine rotor 313.
- the rotation speed of the low-pressure turbine rotor 313 can be increased by increasing the PID control gain (sensitivity) in the control unit 6. It can be raised quickly.
- the compressor system 1 of the present embodiment includes two compressor trains 2, but the number of compressor trains 2 is not limited to this. There may be a plurality of compressor trains 2, and there may be three or more compressor trains 2. When there are three or more compressor trains 2, the number of compression trains operated in parallel increases. As a result, the load when one compressor Tren 2 is stopped can be supplemented by two or more compressor Tren 2. Therefore, the compressor system 1 can be operated more stably.
- the plurality of compressor trays 2 are not limited to having the same configuration as in the present embodiment, and may have different configurations. Therefore, the plurality of compressor trains 2 may have different configurations of the gas turbine 3 and the compression unit 4 in terms of required output, type of fluid to be compressed, and the like.
- the compressor system 1 of the present embodiment includes two fluid supply units 5, but the number of fluid supply units 5 is not limited to this. At least one fluid supply unit 5 may be provided, and an appropriate number may be arranged according to the type of fluid supplied to the compression unit 4 (the type of fluid to be compressed by the compression unit 4).
- the configuration of the compressor in the compression unit 4 is not limited to the configuration of the present embodiment.
- the compression unit 4 may have at least one compressor, and may have four or more compressors.
- bypass flow path is not limited to the configuration of the present embodiment.
- the bypass flow path may not be provided, and a plurality of bypass flow paths may be provided for each compressor.
- control unit 6 is not limited to the configuration of the present embodiment.
- the control unit 6 may have another control device that individually controls the first compressor tray 2A and the second compressor tray 2B.
- the information on the operating state of the first compressor Tren 2A and the second compressor Tren 2B input to the control unit 6 is not limited to the information described in the present embodiment.
- the information on the operating state of the first compressor Tren 2A and the second compressor Tren 2B may be any information indicating that the compressor Tren 2 is stopped, as long as it is information indicating an abnormality in the compressor Tren 2. Good. Therefore, as information on the operating states of the first compressor tray 2A and the second compressor tray 2B, for example, information on the rotation speeds of the first rotor 10 and the second rotor 20, the biaxial gas turbine 3 and each compression.
- Information on the output of the machine may be input to the input unit 61.
- control unit 6 is limited to inputting both the stop signal information of the first compressor train 2A and the second compressor train 2B and the pressure information acquired by the pressure sensor P. is not it. Only one of the stop signal information of the first compressor train 2A and the second compressor train 2B and the pressure information acquired by the pressure sensor P may be input to the input unit 61.
- the information on the operating state of the first compressor Tren 2A and the second compressor Tren 2B is not limited to using only the pressure sensor P. Therefore, not only the pressure information acquired by the pressure sensor P but also other flow rate and temperature information may be input to the input unit 61.
- the compressor system 1 has a plurality of compressors including a biaxial gas turbine 3 and a compressor 4 including at least one compressor driven by the biaxial gas turbine 3.
- Compressor Tren 2 and a fluid supply unit 5 having one fluid supply source and distributing and supplying the fluid supplied from the fluid supply source to the compressors in the plurality of compressor Tren 2.
- the biaxial gas turbine 3 has a compressor rotor 311 and is compressed by the gas turbine compressor 31 that compresses air by the rotation of the compressor rotor 311 and the gas turbine compressor 31.
- a high-pressure turbine 34 having a combustor 32 that generates combustion gas from air and fuel, a high-pressure turbine rotor 312 that is mechanically connected to the compressor rotor 311 and driven to rotate with the combustion gas, and the high-pressure turbine rotor 312.
- a low-pressure turbine 35 having a low-pressure turbine rotor 313 which is arranged apart from the above and rotationally driven by the combustion gas after the high-pressure turbine rotor 312 is rotationally driven, and the plurality of compressor trays 2 are operated in parallel. It is possible.
- the compressor rotor 311 and the high pressure turbine rotor 312 and the low pressure turbine rotor 313 connected to a plurality of compressors can be operated at different rotation speeds. That is, the speed can be adjusted in a wider operating range. Therefore, it is possible to prevent the compressor Tren 2 from stopping unintentionally, and the operation can be continued stably.
- the compressor system 1 is the compressor system 1 of (1), further including a control unit 6 capable of controlling the operating conditions of the plurality of compressor trays 2.
- the control unit 6 returns the fluid compressed by the compressor to the suction port of the compressor with respect to the other compressor trains that are not stopped. The amount may be increased.
- the amount of fluid returned to the compressor increases. That is, the amount of fluid newly supplied to the compressor can be suppressed. Therefore, the increase in the load on the compressor can be suppressed. As a result, the rate of decrease in the rotation speed of the low-pressure turbine rotor 313 caused by the compressor can be alleviated. As a result, it is possible to prevent the compressor Tren 2 operating normally from stopping unintentionally.
- the compressor system 1 is the compressor system 1 of (2), and the compressor 4 uses the fluid discharged from the discharge port of the compressor of the compressor.
- a bypass flow path connecting the suction port and the discharge port so as to return to the suction port, and a bypass valve arranged in the bypass flow path and capable of adjusting the flow rate of the fluid flowing through the bypass flow path.
- the control unit 6 has a bypass flow rate with respect to the bypass valve of the compressor unit 4 of the other compressor train 2 that has not stopped. Instructions may be sent to increase the opening so as to increase the flow rate of the fluid flowing through the path.
- the amount of fluid returned to the operating compressor can be easily increased in response to the stoppage of the compressor Tren 2.
- the compressor system 1 is the compressor system 1 of (1), further including a control unit 6 capable of controlling the operating conditions of the plurality of compressor trays 2.
- the control unit 6 may increase the energy applied to the high-pressure turbine rotor 312 of the other compressor trains 2 that are not stopped.
- the rotation speed of the low-pressure turbine rotor 313 also increases, and it is possible to suppress a decrease in the rotation speed of the compression unit 4.
- the rate of decrease in the rotation speed in the compression unit 4 can be alleviated.
- the compressor system 1 is the compressor system 1 of (1), further including a control unit 6 capable of controlling the operating conditions of the plurality of compressor trays 2.
- the compression unit 4 has a pressure value acquisition unit that acquires a pressure value at a suction port of the compressor and sends information on the pressure value to the control unit 6, and the control unit 6 has the plurality of pressure value acquisition units.
- the pressure value acquired by the pressure value acquisition unit in one of the compressor trains 2 of the above exceeds a predetermined reference value, the rotation speed of the low pressure turbine rotor 313 of the other compressor train 2 is increased. You may let me.
- the compressor system 1 is the compressor system 1 of (1), further including a control unit 6 capable of controlling the operating conditions of the preceding plurality of compressor trays 2. When one of the plurality of compressor trays 2 is stopped, the control unit 6 may reduce the flow rate of the fluid supplied to the compressor of the other compressor trays 2 that are not stopped.
- the amount of fluid compressed by the compressor is reduced, and the increase in the load on the compressor is suppressed.
- the rate of decrease in the number of revolutions in the compression unit 4 caused by the compressor can be alleviated.
- the compressor system 1 according to the seventh aspect is the compressor system 1 of (6), and the compression unit 4 is connected to the fluid supply unit 5, and the fluid is inside the compressor.
- the control unit 6 has the inlet flow path for supplying the compressor and the inlet valve which is arranged in the inlet flow path and can adjust the flow rate of the fluid flowing through the inlet flow path.
- the inlet valve of the compression unit 4 of the other compressor tray 2 that is not stopped is opened so as to reduce the flow rate of the fluid flowing through the inlet flow path. You may send instructions to narrow the degree.
- the amount of fluid supplied to the operating compressor can be easily reduced in response to the stoppage of the compressor tray 2.
- Compressor system 2 Compressor Tren 2A First compressor Tren 2B Second compressor Tren 3 Gas turbine 31 Gas turbine Compressor O1 First axis 311 Compressor rotor 32 Combustor LF1 Fuel supply path VF1 Fuel supply valve 34 High pressure turbine 312 High pressure turbine rotor 10 1st rotor 35 Low pressure turbine O2 2nd axis 313 Low pressure turbine rotor 20 2nd rotor 4 Compressor 41 1st compressor 411 1st compressor rotor LI1 1st inlet flow path VI1 1st inlet valve LM1 1st 1 Intermediate flow path VM1 1st intermediate valve 42 2nd compressor 421 2nd compressor rotor LI2 2nd inlet flow path VI2 2nd inlet valve P pressure sensor 43 3rd compressor 431 3rd compressor rotor LI3 3rd inlet flow Path C1 First cooling section LO3 Third outlet flow path C2 Second cooling section LB1 First bypass flow path VB1 First bypass valve LB2 Second bypass flow path VB2 Second bypass valve
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Abstract
Description
本願は、2019年12月20日に日本に出願された特願2019-230295号について優先権を主張し、その内容をここに援用する。
以下、本開示の実施形態に係る圧縮機システム1について、図1を参照して説明する。
図1に示すように、圧縮機システム1は、複数(本実施形態では二つ)の圧縮機トレン2と、複数(本実施形態では二つ)の流体供給部5と、制御部6とを備える。本実施形態では、圧縮機システム1がLNGプラントに適用される場合を例に挙げて説明する。なお、圧縮機システム1が用いられるプラントはLNGプラントに限定されるものではない。圧縮機システム1は、流体を圧縮する必要がある各種プラントに用いることができる。したがって、圧縮機システム1は、例えば、ナフサ等の原料を分離精製してエチレンを生成するエチレンプラントに適用されてもよい。
圧縮機トレン2は、二軸式のガスタービン3と、少なくとも一つの圧縮機を含む圧縮部4とを有する。本実施形態の圧縮機トレン2は、駆動機である一台のガスタービン3によって駆動される複数の圧縮機によって、複数の流体を圧縮している。複数の圧縮機トレン2は、並列運転可能とされている。ここで、並列運転とは、同時に運転されることである。並列運転時には、複数の圧縮機トレン2は、同一の運転条件で運転されてもよく、異なる運転条件で運転されてもよい。本実施形態の圧縮機システム1は、第一圧縮機トレン2Aと、第二圧縮機トレン2Bとの二つの圧縮機トレン2を有している。本実施形態では、第一圧縮機トレン2A及び第二圧縮機トレン2Bは、同一の構成とされている。
二軸式のガスタービン3は、圧縮部4の圧縮機を駆動させるための回転駆動力を発生させる。二軸式のガスタービン3は、ガスタービン圧縮機31と、燃焼器32と、高圧タービン34と、低圧タービン35とを有する。また、駆動機であるガスタービン3は多軸式(本実施形態では二軸式)を対象にしており、図1に示す二軸機に限定されるものではない。
圧縮部4は、二軸式のガスタービン3によって、供給される流体を圧縮する。本実施形態の圧縮部4は、例えば、LNGプラントで、天然ガスを液化するために用いられる冷凍機の冷媒を圧縮する。本実施形態の圧縮部4は、第一圧縮機41、第二圧縮機42、及び第三圧縮機43の三つの圧縮機を有する。
流体供給部5は、一の流体供給源を有している。流体供給部5は、流体供給源から供給される流体を複数の圧縮機トレン2における圧縮機にそれぞれ分配して供給可能とされている。本実施形態の圧縮機システム1では、流体供給部5として、第一流体供給部5Aと、第二流体供給部5Bと、を備えている。
制御部6は、複数の圧縮機トレン2の運転条件を制御可能とされている。本実施形態の制御部6は、第一圧縮機トレン2A及び第二圧縮機トレン2Bを独立して同時に制御可能とされている。制御部6は、各圧縮機トレン2に対して、二軸式のガスタービン3及び圧縮部4をそれぞれ制御可能とされている。具体的には、制御部6は、圧縮機トレン2の運転状態を監視し、各弁に指示を送っている。これにより、制御部6では、複数の圧縮機トレン2の一つが停止した場合に、停止していない他の圧縮機トレン2に対して、「少なくとも一つの圧縮機に供給される流体の流量を増加させる」、「少なくとも一つの圧縮機に圧縮した流体を戻す量を増加させる」、「高圧タービンロータ312に加えるエネルギーを増加させる」、及び、「低圧タービンロータ313の回転数を増加させる」の少なくとも一つを行わせるための指示を送っている。
圧縮機システム1では、複数の圧縮機トレン2を並列運転する際には、複数の圧縮機トレン2において、第一ロータ10及び第二ロータ20の回転数がほぼ同じとされて運転される。その際に、弁等の装置に対して故障等の不具合が生じる場合がある。その結果、不具合が生じている圧縮機トレン2の一部の圧縮機のプロセスのバランスが崩れてしまう。このような状態となった際に、正常に運転している圧縮機の負荷が一時的に増大し、圧縮機の回転数低下を生じさせる。単軸のガスタービン3を適用している場合には、ガスタービン3は一定の回転数(ほぼ定格速度)でしか運転ができないために、圧縮機トレン2全体が停止してしまう可能性がある。しかしながら、上記構成の圧縮機システム1では、全ての圧縮機トレン2に二軸式のガスタービン3が適用されている。そのため、第一ロータ10と、第一圧縮機41から第三圧縮機43に繋がれた第二ロータ20とを異なる回転数で運転することができる。つまり、より広い運転範囲で速度調整を行うことができる。したがって、圧縮機トレン2が意図せずに停止してしまうことを抑制し、運転が安定して継続できる。
以上、本開示の実施の形態について図面を参照して詳述したが、具体的な構成はこの実施の形態に限られるものではなく、本開示の要旨を逸脱しない範囲の設計変更等も含まれる。
実施形態に記載の圧縮機システム1は、例えば以下のように把握される。
2 圧縮機トレン
2A 第一圧縮機トレン
2B 第二圧縮機トレン
3 ガスタービン
31 ガスタービン圧縮機
O1 第一軸線
311 圧縮機ロータ
32 燃焼器
LF1 燃料供給路
VF1 燃料供給弁
34 高圧タービン
312 高圧タービンロータ
10 第一ロータ
35 低圧タービン
O2 第二軸線
313 低圧タービンロータ
20 第二ロータ
4 圧縮部
41 第一圧縮機
411 第一圧縮部ロータ
LI1 第一入口流路
VI1 第一入口弁
LM1 第一中間流路
VM1 第一中間弁
42 第二圧縮機
421 第二圧縮部ロータ
LI2 第二入口流路
VI2 第二入口弁
P 圧力センサ
43 第三圧縮機
431 第三圧縮部ロータ
LI3 第三入口流路
C1 第一冷却部
LO3 第三出口流路
C2 第二冷却部
LB1 第一バイパス流路
VB1 第一バイパス弁
LB2 第二バイパス流路
VB2 第二バイパス弁
LB3 第三バイパス流路
VB3 第三バイパス弁
5 流体供給部
5A 第一流体供給部
511 第一流体供給源
512 第一供給路
513 第一分岐路
5B 第二流体供給部
521 第二流体供給源
522 第二供給路
523 第二分岐路
6 制御部
61 入力部
62 判定部
63 第一出力部
64 第二出力部
65 第三出力部
66 第四出力部
Claims (7)
- 多軸式のガスタービンと、前記多軸式のガスタービンによって駆動される少なくとも一つの圧縮機を含む圧縮部とを有する複数の圧縮機トレンと、
一の流体供給源を有し、前記流体供給源から供給される流体を前記複数の圧縮機トレンにおける前記圧縮機にそれぞれ分配して供給する流体供給部と、を備え、
前記多軸式のガスタービンは、
圧縮機ロータを有し、前記圧縮機ロータの回転によって空気を圧縮するガスタービン圧縮機と、
前記ガスタービン圧縮機で圧縮された空気と燃料とによって燃焼ガスを生成する燃焼器と、
前記圧縮機ロータと機械的に連結されて前記燃焼ガスで回転駆動する高圧タービンロータを有する高圧タービンと、
前記高圧タービンロータと離れて配置されて前記高圧タービンロータを回転駆動した後の前記燃焼ガスによって回転駆動する低圧タービンロータを有する低圧タービンと、を有し、
前記複数の圧縮機トレンは、並列運転可能とされている圧縮機システム。 - 前記複数の圧縮機トレンの運転条件を制御可能な制御部と、をさらに備え、
前記制御部は、前記複数の圧縮機トレンの一つが停止した場合に、停止していない他の圧縮機トレンに対し、前記圧縮機で圧縮された流体を前記圧縮機の吸込口に戻す量を増加させる請求項1に記載の圧縮機システム。 - 前記圧縮部は、
前記圧縮機の排出口から排出された前記流体を前記圧縮機の吸込口に戻すように、前記吸込口と前記排出口とを繋ぐバイパス流路と、
前記バイパス流路に配置され、前記バイパス流路を流通する前記流体の流量を調整可能なバイパス弁と、を有し、
前記制御部は、前記複数の圧縮機トレンの一つが停止した場合に、停止していない他の圧縮機トレンの前記圧縮部の前記バイパス弁に対して、前記バイパス流路を流通する前記流体の流量を増加させるように開度を広げるように指示を送る請求項2に記載の圧縮機システム。 - 前記複数の圧縮機トレンの運転条件を制御可能な制御部と、をさらに備え、
前記制御部は、前記複数の圧縮機トレンの一つが停止した場合に、停止していない他の圧縮機トレンの前記高圧タービンロータに加えるエネルギーを増加させる請求項1に記載の圧縮機システム。 - 前記複数の圧縮機トレンの運転条件を制御可能な制御部と、をさらに備え、
前記圧縮部は、前記圧縮機の吸込口での圧力の値を取得し、前記圧力の値の情報を前記制御部に送る圧力値取得部を有し、
前記制御部は、前記複数の圧縮機トレンの一つにおける前記圧力値取得部で取得した前記圧力の値が予め定めた基準値を超えた場合に、他の圧縮機トレンの前記低圧タービンロータの回転数を増加させる請求項1に記載の圧縮機システム。 - 前複数の圧縮機トレンの運転条件を制御可能な制御部と、をさらに備え、
前記制御部は、前記複数の圧縮機トレンの一つが停止した場合に、停止していない他の圧縮機トレンの前記圧縮機に供給される前記流体の流量を減少させる請求項1に記載の圧縮機システム。 - 前記圧縮部は、
前記流体供給部と繋がれ、前記圧縮機の内部に前記流体を供給する入口流路と、
前記入口流路に配置され、前記入口流路を流通する前記流体の流量を調整可能な入口弁と、を有し、
前記制御部は、前記複数の圧縮機トレンの一つが停止した場合に、停止していない他の圧縮機トレンの前記圧縮部の前記入口弁に対して、前記入口流路を流通する前記流体の流量を減少させるように開度を狭めるように指示を送る請求項6に記載の圧縮機システム。
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