WO2018235267A1 - 天然ガス液化装置 - Google Patents
天然ガス液化装置 Download PDFInfo
- Publication number
- WO2018235267A1 WO2018235267A1 PCT/JP2017/023215 JP2017023215W WO2018235267A1 WO 2018235267 A1 WO2018235267 A1 WO 2018235267A1 JP 2017023215 W JP2017023215 W JP 2017023215W WO 2018235267 A1 WO2018235267 A1 WO 2018235267A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- maintenance
- natural gas
- crane
- installation area
- pipe rack
- Prior art date
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 268
- 239000003345 natural gas Substances 0.000 title claims abstract description 133
- 238000009434 installation Methods 0.000 claims abstract description 187
- 238000012423 maintenance Methods 0.000 claims abstract description 152
- 239000003507 refrigerant Substances 0.000 claims description 40
- 239000007789 gas Substances 0.000 claims description 39
- 238000001816 cooling Methods 0.000 claims description 19
- 239000012530 fluid Substances 0.000 claims description 12
- 230000009466 transformation Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 description 22
- 238000000034 method Methods 0.000 description 15
- 239000003949 liquefied natural gas Substances 0.000 description 13
- 239000002253 acid Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 9
- 229910052753 mercury Inorganic materials 0.000 description 9
- 238000000926 separation method Methods 0.000 description 9
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 8
- 230000008929 regeneration Effects 0.000 description 8
- 238000011069 regeneration method Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 239000001294 propane Substances 0.000 description 4
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 3
- 229940021260 by ache Drugs 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000007781 pre-processing Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 230000002528 anti-freeze Effects 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- -1 amine compound Chemical class 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
- F25J1/0022—Hydrocarbons, e.g. natural gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
- F25J1/0259—Modularity and arrangement of parts of the liquefaction unit and in particular of the cold box, e.g. pre-fabrication, assembling and erection, dimensions, horizontal layout "plot"
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
- F25J2290/42—Modularity, pre-fabrication of modules, assembling and erection, horizontal layout, i.e. plot plan, and vertical arrangement of parts of the cryogenic unit, e.g. of the cold box
Definitions
- the present invention relates to a technology for determining the installation position of equipment disposed in a natural gas liquefier.
- the natural gas liquefaction system performs pretreatment to remove impurities contained in natural gas (NG: Natural Gas) produced in gas wells etc., and then cools and liquefies the NG, thereby liquefying natural gas.
- NG Natural Gas
- LNG Liquefied Natural Gas
- this NG liquefaction apparatus in addition to the fuel gas obtained by extracting a part of NG to be treated, the condensate which is the liquid contained in NG, etc., an absorbent used for removing impurities and an adsorbent , And various fluids and chemicals such as a refrigerant for cooling NG and a heat medium used for various heating operations. For this reason, in the NG liquefaction apparatus, a large number of devices such as devices for performing various processes related to these substances, and devices for transferring and temporarily storing various fluids are disposed.
- Patent Document 1 in order to constitute a production train of LNG, a group of devices constituting an NG liquefaction facility (aliquefied natural gas production facility) on a base having a rectangular shape in plan view are respectively shown.
- NG liquefaction equipment combining a plurality of provided modules (modules) and a heat exchanger group (heat exchanger bank) provided with a large number of air-cooled heat exchangers on the first level of the main pipe rack is described. There is.
- a main axis (a major axis) is set in the manufacturing train, and in the heat exchanger group, a large number of heat exchangers are arranged side by side along the main axis direction of the manufacturing train.
- the plurality of modules are arranged such that the major axis forming the long side of each base is arranged to lie major to the major axis of the manufacturing train, and the other modules are mutually connected.
- a plurality of space-apart modules by arranging a subset of the heat exchangers so that the module is partially covered (partially covered module), a compact device arrangement is realized. doing.
- compression of a pre-refrigerant after being used for pre-cooling of NG and cooling of a main refrigerant, and compression of a main refrigerant after being used for liquefaction of NG after pre-cooling are each a plurality of compressors
- a liquefied gas production facility is described in which (the first and fourth compressors for pre-refrigerant compression and the second and third compressors for main refrigerant compression) are used.
- the first compressor along a long side of the pipe rack, a pre-cooling heat exchange unit performing pre-cooling of NG, an auxiliary heat exchange unit performing cooling of the main refrigerant, and a fourth compressor are arranged in this order, and the second compressor, the main heat exchange unit for liquefying the NG, and the third compressor are arranged in this order along the other long side of the pipe rack.
- the equipment arrangement has been realized with reduced complexity of routing and increased installation space.
- Patent Documents 1 and 2 realize space saving of the NG liquefier (NG liquefaction facility, liquefied gas production facility) by arranging the devices based on the respective ideas.
- NG liquefier NG liquefaction facility, liquefied gas production facility
- a technique for arranging a large number of devices in a limited device installation area is disclosed in any of Patent Documents 1 and 2 Absent.
- the present invention has been made under such a background, and an object thereof is to provide a natural gas liquefier which is easy to perform maintenance and has a compact configuration.
- the natural gas liquefying apparatus of the present invention is a natural gas liquefying apparatus for liquefying natural gas,
- a device installation area in which a device group including a plurality of devices constituting a part of the natural gas liquefying device is installed;
- An obstacle is disposed on the other edge side opposite to the one edge portion provided along the device installation region and extending along the device installation region, whereby a preset maximum lifting load or less is obtained.
- a maintenance access path which can be operated by only a maintenance crane which is a mobile crane of a size of Among a plurality of devices included in the device group, a device for which maintenance is performed using a crane is the maintenance crane along the boundary line of the device installation area including the one edge of the maintenance access path. When it arranges, it is installed in the range of the working radius of the crane for said maintenance determined according to the lifting load required at the time of the maintenance of the said apparatus.
- the natural gas liquefier may have the following features.
- B) The device installation area is provided along a main pipe rack of a frame structure that holds piping through which the fluid handled by the natural gas liquefying device flows, and the boundary of the device installation area along the main pipe rack From the wire side, the equipment on which maintenance is performed using the crane is installed, with the setting condition of the equipment installation position not to perform maintenance in which the maintenance crane is arranged.
- an air-cooled heat exchanger for cooling the fluid handled by the device group is provided in the device installation area. Further, when the natural gas liquefying device is viewed in plan, the maintenance access path is provided so as to extend in a direction intersecting a boundary along the main pipe rack.
- a sub-pipe rack having a frame structure for holding a pipe through which the fluid handled by the group of devices flows is provided in the device installation area, and the natural gas liquefying device When viewed in a plan view, the sub-pipe rack is provided to extend in a direction intersecting the boundary line along the main pipe rack, and using a maintenance crane disposed in the maintenance access path Equipment to be maintained must be installed on both sides of the sub-pipe rack.
- At least one of a transformation chamber for supplying power to a power consuming device provided in the natural gas liquefying device and a refrigerant compressor for compressing a refrigerant for cooling the natural gas is the device It is provided outside the installation area and at a position away from the maintenance access path which is not restricted by the preset maximum lifting load of the maintenance crane.
- a sub-pipe rack having a frame structure for holding a pipe through which the fluid handled by the device group flows is provided in the device installation area, and the natural gas liquefying device is viewed in plan, The sub-pipe rack is provided to extend in a direction crossing a boundary along the main pipe rack, and the sub-pipe rack is extended and extended so as to protrude from the device installation area.
- a substation room is provided at the end of the pipe rack for supplying power to the power consuming device provided in the natural gas liquefying apparatus.
- the preset maximum lifting load of the maintenance crane capable of entering the maintenance access path is 50 tons or less.
- the present invention is a maintenance approach path in which an upper limit is provided to the size of the maintenance crane which can be approached when the maintenance crane is arranged along the boundary of the equipment installation area where the equipment group of the natural gas liquefier is installed.
- the equipment to be maintained is disposed within the range of the working radius of the maintenance crane having a size equal to or less than the upper limit not only at the position in contact with the position but also at other positions.
- FIG. 1 shows a schematic configuration example of a natural gas (NG) liquefier configured using the module for a natural gas liquefier according to this example.
- NG natural gas
- the annual production of LNG is about 2 to 1 million tons
- C3 refrigerant pre-refrigerant
- the NG liquefaction apparatus includes a gas-liquid separation unit 11 for separating liquid from NG, a mercury removal unit 12 for removing mercury in the NG, and an acid gas removal unit for removing acid gas such as carbon dioxide and hydrogen sulfide from the NG. 13, a water removing unit 14 for removing a small amount of water contained in the NG, a liquefaction processing unit 15 for obtaining LNG by cooling and liquefying the NG from which these impurities have been removed, and storing the liquefied LNG And a tank 17.
- the gas-liquid separation unit 11 separates the liquid condensate at normal temperature contained in NG transported by a pipeline or the like.
- the gas-liquid separation unit 11 is configured of a drum for separating the liquid from the NG using a specific gravity difference, and an elongated pipe arranged in an inclined manner.
- apparatuses groups such as an antifreeze liquid regeneration tower and reboiler which perform heat regeneration of the antifreeze liquid added as needed in order to prevent the obstruction of the pipeline in the process of transport, and these incidental equipment.
- the mercury removal unit 12 removes a trace amount of mercury contained in NG after the liquid is separated.
- the mercury removal part 12 is equipped with equipment groups, such as the mercury adsorption tower 121 with which the mercury removal agent was filled, and its incidental equipment.
- the acid gas removal unit 13 removes acid gas such as carbon dioxide and hydrogen sulfide that may solidify in LNG during liquefaction.
- acid gas such as carbon dioxide and hydrogen sulfide that may solidify in LNG during liquefaction.
- Examples of the method for removing the acid gas include a method using a gas absorbing solution containing an amine compound and the like, and a method using a gas separation membrane that allows the acid gas in NG to permeate.
- the acid gas removing unit 13 is provided with an absorption tower 131 for bringing the natural gas and the gas absorbing liquid into countercurrent contact, and a regeneration tower 132 for regenerating the gas absorbing liquid having absorbed the acid gas. , A reboiler for heating the gas absorbing liquid in the regeneration tower 132, and a group of equipment such as these incidental facilities.
- the acid gas removal unit 13 includes a group of devices such as a gas separation unit in which a large number of hollow fiber membranes are accommodated in the main body, and an accessory equipment thereof.
- the water removing unit 14 removes a small amount of water contained in the NG.
- the water removing unit 14 is filled with an adsorbent such as molecular sieve or silica gel, and a plurality of adsorption towers 141a are implemented by alternately switching between the NG water removing operation and the regeneration operation of the adsorbent having adsorbed water.
- the liquefaction processing unit 15 is a NG by the main refrigerant which is a mixed refrigerant (Mixed Refrigerant: MR refrigerant) containing a plurality of refrigerant raw materials such as nitrogen, methane, ethane, propane, etc.
- MR refrigerant Mixed refrigerant
- MCHE Main Cryogenic Heat Exchanger
- the refrigerant compressor 21 that compresses the gas of the main refrigerant vaporized by heat exchange with NG
- a device group such as a suction drum that performs gas-liquid separation of a supplied gas (vaporized main refrigerant).
- coolant compressors 21 may be provided in series according to a pressure
- FIG. 1 shows an example in which the gas turbine 22 is used as a power source for driving the refrigerant compressor 21, a motor or the like may be used depending on the size of the refrigerant compressor 21 or the like.
- the device group relating to the refrigerant compressor 21 and the gas turbine 22 is installed at a distance from the MCHE 151 and the scrub column 152. Handle independently from the liquefaction processing unit 15.
- the liquefaction processing unit 15 further includes a de-ethanizer 162 for separating ethane from the liquid (liquid heavy components) separated from the cooled NG, a de-propanizer 163 for separating propane from the liquid after ethane separation, and propane.
- a rectifying unit 16 including a debutanizer 164 for separating butane from the separated liquid and obtaining liquid condensate at room temperature, and a stabilizer 161 for adjusting the vapor pressure of the condensate is provided side by side.
- the deeta- nerizer 162, the depropanizer 163, the debutanizer 164, and the stabilizer 161 each include a rectification column that rectifies each component, a reboiler that heats the liquid in each rectification column, and a group of equipment such as these incidental facilities. ing. Note that the stabilizer 161 may not be provided if adjustment of the vapor pressure of the condensate is unnecessary.
- the liquefied natural gas (LNG) which has been liquefied and subcooled in the liquefaction processing unit 15 is fed to the storage tank 17 and stored.
- the LNG stored in the storage tank 17 is transported by an unshown LNG pump and shipped to an LNG tanker, truck, or pipeline.
- heat supplied to various heating operations carried out by the various processing units 11 to 16 described above and to a heater for preventing freezing of the ground provided on the bottom surface of the storage tank 17 or the like Such as oil heaters and boilers that heat media (for example, hot oil and steam, etc.), its ancillary facilities, gas turbine generators and gas engine generators that supply power consumed in the NG liquefier, and ancillary facilities
- An equipment group is also set up.
- this example shows an example of an NG liquefier that does not perform pre-cooling of the NG by the pre-refrigerant or cooling of the main refrigerant, but when performing these processing, pre-cooling of the NG by the pre-refrigerant It is possible to provide a pre-cooling heat exchanger which carries out the cooling, a refrigerant compressor which compresses the vaporized pre-refrigerant, and a gas turbine or motor which is a power source of the refrigerant compressor.
- FIG. 8 shows an example of the installation layout of a conventionally known NG liquefier.
- the NG liquefaction equipment described in Patent Document 1 exemplified as the prior art is also configured based on the installation layout of the NG liquefier shown in FIG.
- the NG liquefaction apparatus shown in FIG. 8 includes an elongated strip-like main pipe rack 31 disposed linearly as viewed from the top surface side.
- the main pipe rack 31 is constructed in a frame structure, and holds piping (not shown) through which various fluids handled in the NG liquefier flow.
- a plurality of device installation areas A1 to A6 are arranged at an interval from each other.
- a device group including a plurality of devices constituting a part of the NG liquefier for example, the various processing units 11 to 16 and the refrigerant compressor 21 and the gas turbine 22 described above.
- FIG. 8 showing the conventional installation layout and FIGS. 3 to 7 showing the installation layout of the NG liquefier according to the present embodiment
- the broken line indicates the outer edge of each equipment installation area A1 to A6 from the viewpoint of facility management etc. Shows the division lines set to divide the
- the refrigerant compressor 21, the device installation area A 6 of the gas turbine 22, the device installation area A 2 of the mercury removal unit 12 and the water removal unit 14, etc. are arranged in a row. Further, along the front long side of the main pipe rack 31, the equipment installation area A4 of the rectification unit 16, the equipment installation area A1 of the liquefaction processing unit 15, the equipment installation area of the gas-liquid separation unit 11 and the acid gas removal unit 13 A5 etc. are arranged in a line.
- the conventional NG liquefaction apparatus has a configuration in which relatively large devices are arranged along the dividing lines of the device installation areas A1 to A6 and smaller devices are arranged in the remaining area. It has become.
- a rack (not shown) having a multi-story structure may be provided in the "remaining area", and these small devices may be installed on each floor of this rack.
- the devices 141a, 141b, and 121 are provided side by side along the dividing line on the left hand side.
- the devices 162, 163, 164, and 161 are provided side by side along the left dividing line.
- the devices 151 and 152 are provided at both ends of the dividing line on the back side, and the device 151 and its related devices 155 and 156 are provided side by side along the dividing line on the left hand side There is.
- the devices 11, 131, 132 are provided side by side along the dividing line on the back side.
- illustration of a small-sized apparatus was abbreviate
- a crane is used for the devices 131, 132 shown hatched in FIG.
- the crane since many devices other than the devices 11, 131 and 132 shown in FIG. 8 are disposed in the device installation area A5, the crane movable to the center side in the device installation area A5 It is difficult to get in and place the In this respect, since a large space exists on the front side of the device installation area A5, a crane having a working radius that can reach the maintenance target devices 131 and 132 is disposed along the front side dividing line of the device installation area A5. By doing this, maintenance of these devices 131 and 132 can be performed.
- the entire NG liquefaction apparatus may spread in the left-right direction, and may not fit in a predetermined site.
- the crane is made to enter the maintenance access 4 'provided along the left-hand side dividing line of the device installation area A2, and maintenance is performed from the left side position of the device installation area A2.
- the device installation area A2 of FIG. 8 when the large-sized devices 141a, 141b, and 121 are disposed adjacent to each other at positions adjacent to each other, the other devices become obstacles and removed. There is also a possibility that the parts can not be transported by the turning movement of the crane. In this case, a space is provided between the dividing line of the device installation area A2 and the arrangement position of the crane, and after pulling out the parts removed from the devices 141b and 121 to the crane side, a position where other devices do not interfere Then, the conveyance by the turning movement is performed.
- the planar shape of each device installation area A2, A1 becomes longer in the left-right direction, and the whole NG liquefaction device There is also a problem that the spread further in the left and right direction.
- the NG liquefier according to the present embodiment is a compact device installation area while minimizing the path width of the maintenance access path 4 as necessary.
- the equipment is arranged to facilitate maintenance using a crane in A1 to A5.
- FIG. 3 is a plan view showing the entire layout of the NG liquefier
- FIGS. 4 to 7 are enlarged plan views of the respective equipment installation areas A1, A2, A4 and A5.
- FIGS. 2A and 2B show the device installation area A which is shown as a model in order to explain the method of determining the installation position of the device of this embodiment.
- the solid line on the outer edge side of the device installation area A indicates a boundary line on which the 25-ton crane 41 can not be disposed inside the position.
- the structure is arranged on the outermost peripheral side of the device installation area A when performing work using the maintenance crane 40 when structures such as equipment and racks are arranged in the device installation area A It is set at a position apart from the object by a distance to be secured from the viewpoint of securing safety and the like.
- the boundary corresponds to the outer edge of the device installation area A where the maintenance crane 40 can not be placed any more inside.
- the dividing lines shown by broken lines in FIGS. 3 to 8 are outer edges in equipment management of the device installation areas A1 to A6 after the installation positions of the respective devices are determined, and these boundary lines and the dividing lines are It may not match exactly.
- the planar shape of the boundary is set to be rectangular, and the front boundary is the long side of the main pipe rack 31 indicated by the alternate long and short dash line. It is arranged along.
- An obstacle 101 is disposed on the side of the left-hand-side boundary of the device installation area A, and a mobile maintenance crane is disposed between the obstacle 101 and the left-hand-side boundary of the device installation area A. It is a maintenance access path 4 for allowing 40 to enter.
- the left hand side boundary of the device installation area A constitutes one edge extending along the device installation area A, and the obstacle 101 is disposed on the other edge side opposite to the one edge. It can be said that the maintenance approach 4 is formed so as to be sandwiched between these two edges.
- the obstacle 101 can be exemplified by, for example, a branched pipe rack 32 described later or a structure such as a device or rack in another device installation area.
- a part of the NG liquefier is configured, and an apparatus group installed in the one apparatus installation area The equipment group different from the equipment included in is installed.
- the width of the maintenance access path 4 is such that only the maintenance crane 40 having a size equal to or less than the preset maximum lifting load can enter.
- the maximum lifting load of the maintenance crane 40 capable of entering the maintenance access path 4 is 25 tons will be described.
- the width of the maintenance access path 4 in this case is, for example, 6 m.
- the maintenance crane 40 has a restriction of a working radius capable of performing a lifting operation according to a boom length and a lifting load at the time of operation.
- the working radius is 16 meters when the lifting load is 16 ton, so 4 meters from the arrangement position of the 25 ton crane 41 Within the working radius, it is only possible to maintain equipment with a required lifting load of 16 tons or less.
- the working radius for a lifting load of 13.7 tons is 6 meters, in the area of 4 to 6 meters from the placement position of the 25-ton crane 41, the required lifting load is less than 13.7 tons Only maintenance can be performed.
- the larger the working radius the smaller the lifting load that can be lifted by the 25-ton crane 41.
- the lifting load according to the work radius is maintained within the range of each work radius described in (Table 1) Equipment required at times is installed.
- the method of determining the installation position of each device described above is not limited to the region along the left-hand side boundary line of the device installation area A extending along the maintenance access path 4, and other boundary lines (boundary lines on the back side, And the region along the right-hand side border).
- the equipment requiring a lifting load of X 1 ton during maintenance is maintained along the boundary lines on the left side, back side and right hand side of the device installation area A when placing the use crane 40 is installed on the lifting load (X 1 tons) installation range a 1 identified from the working radius R 1 of the maintenance crane 40 which is determined in accordance with.
- the equipment whose lifting load required for maintenance is X 2 tons lighter than X 1 is along the boundary lines on the left side, back side and right side of the device installation area A.
- the lifting load (X 2 tons) of the maintenance crane 40 depends on the operating radius R 2 in the installation range a 2 specified from (> R 1).
- the maintenance crane 40 it is difficult to arrange the maintenance crane 40 along the front side border line extending in contact with the main pipe rack 31. Further, even when the maintenance crane 40 is arranged on the further front side of the main pipe rack 31, the space above the main pipe rack 31 can be used by a small maintenance crane 40 such as the 25 ton crane 41 or the 10 ton crane 42. Working through work greatly limits the working radius.
- the installation position of an apparatus is determined as a setting condition of an apparatus installation position that maintenance which arrange
- the said premise is the conditions of the assumption at the time of determining the installation position of an apparatus, and it does not exclude completely performing maintenance of an apparatus over the main pipe rack 31 using a large crane actually. .
- maintenance can be performed using only a small maintenance crane 40 which can be constantly deployed in the NG liquefier and ready for external procurement. It becomes possible to constitute an NG liquefier.
- the maintenance crane 40 which is relatively easy to prepare, for example, the maintenance crane 40 having a maximum lifting load of up to 50 tons can be exemplified.
- the device When the installation position of the device is determined based on the above-described method, the device is installed in the center side of the device installation area A apart from the boundary of the three sides along the arrangement position of the maintenance crane 40. A small number of free areas are formed.
- the planar shape of the device installation area A is rectangular
- the empty area is a rectangular area in a plan view extending in a direction intersecting the long side direction of the main pipe rack 31.
- the sub-pipe rack 100 may be provided so as to extend in the direction intersecting the main pipe rack 31 (the front side border line along the main pipe rack 31) in accordance with the planar shape of the empty area. At this time, it can be said that part of the devices in the device installation area A is installed on both sides of the sub-pipe rack 100 as viewed from the sub-pipe rack 100.
- the sub-pipe rack 100 is an air-cooled thermal type that holds the piping that connects the piping held by the main pipe rack 31 and each device in the device installation area A, and that cools the fluid flowing through these piping as necessary.
- An Air-Cooled Heat Exchanger (ACHE) can be placed on top of it.
- FIG. 3 shows an example of the layout of the device installation areas A1 to A6 in the NG liquefier configured based on the above-described device installation concept.
- a plurality of device installation areas A1 to A5 are arranged in two rows along the long side direction of the main pipe rack 31.
- the devices included in the device group constituting the liquefaction processing unit 15, the mercury removing unit 12, the water removing unit 14, the rectifying unit 16, and the acid gas removing unit 13 shown in FIG. It is divided into A4 and A5 and installed. Further, in the device installation area A3, for example, a heating and supplying device for hot oil used in the NG liquefier is installed.
- the device for which maintenance is performed using the 25-ton crane 41 is referred to as "type 1 lifting device”
- the device for which maintenance is performed using the 10-ton crane 42 is referred to as "type 2 lifting device”.
- the devices shown with round and semi-circular elongated contours at both ends indicate static devices such as towers and heat exchangers
- the devices shown with rectangular contours indicate pumps and ACHE, etc. Shows the
- the device installation area A1 is an area having a rectangular planar shape, which is disposed along the back long side of the main pipe rack 31 extending in the left-right direction. Between the boundary line on the left side of the device installation area A1 and the branch pipe rack 32, which will be described later, and between the boundary line on the right side of the device installation area A1 and the device installation area A2, a main pipe rack Maintenance access paths 4 and 4 are provided so as to extend in a direction intersecting the boundary along the long side 31.
- the type 1 lifting devices 15A to 15C for which maintenance using the 25-ton crane 41 is performed in the device installation area A1 are the working radiuses of the 25-ton crane 41 whose arrangement position is illustrated in FIG. It is installed in the range. Further, the second type lifting equipment 15a, 15b on which the maintenance using the 10 ton crane 42 is performed is installed within the range of each working radius of the 10 ton crane 42 whose arrangement position is illustrated in FIG. .
- a sub-pipe rack 150 is disposed so as to extend in a direction intersecting the main pipe rack 31.
- a main refrigerant cooler 153 configured by ACHE is disposed in a region along the border on the back side of the device installation region A1.
- an expansion area B in which a device is added at the time of future capacity increase is secured.
- the device installation area A2 is an area having a rectangular planar shape, which is disposed along the back long side of the main pipe rack 31 extending in the left-right direction. Between the boundary line on the left side of the device installation area A2 and the device installation area A1, and between the boundary line on the right side of the device installation area A2 and the device installation area A3, the main pipe rack 31 is Maintenance access paths 4 are provided so as to extend in a direction intersecting the boundary along the long side.
- the first type lifting devices 12A to 12C, 14A and 16A for which maintenance using the 25 ton crane 41 is performed in the device installation area A2 are the 25 ton crane 41 whose arrangement position is illustrated in FIG. It is installed within the range of each working radius.
- the second type lifting equipment 12a, 14a, 16a for maintenance using the 10 ton crane 42 is installed within the working radius range of the 10 ton crane 42 whose arrangement position is illustrated in FIG. 4 (b). ing.
- a sub-pipe rack 120 is disposed so as to extend in a direction intersecting the main pipe rack 31.
- a regeneration gas cooler 142 constituted by ACHE is disposed at the top of the sub-pipe rack 120.
- the device installation area A4 is an area having a rectangular planar shape disposed along the front long side of the main pipe rack 31 extending in the left-right direction.
- a maintenance access path 4 provided so as to extend in a direction intersecting the boundary along the long side of the main pipe rack 31 between the boundary on the right side of the device installation area A4 and the device installation area A5. Is formed.
- the type 1 lifting devices 16B and 16C on which maintenance using the 25-ton crane 41 is performed in the device installation area A4 are the working radii of the 25-ton crane 41 whose arrangement position is illustrated in FIG. It is installed in the range. Further, the second type lifting devices 16b to 16e on which maintenance using the 10 ton crane 42 is performed are installed within the working radius range of the 10 ton crane 42 whose arrangement position is illustrated in FIG. .
- a sub-pipe rack 160 is disposed so as to extend in a direction intersecting the main pipe rack 31.
- an overhead cooler 165 constituted by ACHE is disposed at the top of the sub-pipe rack 160.
- the sub-pipe rack 160 is extended so as to protrude from the device installation area A4 to constitute a branch pipe rack 32, and the end portion of the extended branch pipe rack 32 is NG liquefied.
- a transformer room SS is provided for supplying power to power consuming devices provided in the apparatus.
- the device installation area A5 is an area having a substantially rectangular planar shape disposed along the front long side of the main pipe rack 31 extending in the left-right direction.
- a maintenance access path 4 provided so as to extend in a direction intersecting the boundary along the long side of the main pipe rack 31 between the left side of the equipment installation area A5 and the equipment installation area A4. Is formed.
- the type 1 lifting devices 13A to 13F for which maintenance using the 25-ton crane 41 is performed in the device installation area A5 are the working radii of the 25-ton crane 41 whose arrangement position is illustrated in FIG. It is installed in the range.
- the second type lifting devices 13a to 13c for which maintenance is performed using the 10-ton crane 42 are installed within the working radius range of the 10-ton crane 42 whose arrangement position is illustrated in FIG. 7 (b). .
- a sub-pipe rack 130 is disposed so as to extend in a direction intersecting the main pipe rack 31.
- the 25 ton crane 41 is used based on the method described using FIG.
- the type 1 lifting equipment on which the used maintenance is performed and the type 2 lifting equipment on which the maintenance using the 10-ton crane 42 is performed are classified into positions according to the working radius of each crane 41, 42 and arranged It is done.
- the device installation area A1 described with reference to FIG. 8 is provided by arranging the devices along the boundary between the device installation areas A1, A2, A4 and A5. As compared with the conventional example in which these devices are arranged side by side along one side of the dividing line of A2, A4 and A5, the arrangement interval of each device can be extended. Under this condition, by determining the setting position of the equipment taking into consideration the working radius of the maintenance crane 40 (25 ton crane 41, 10 ton crane 42), the equipment installed adjacent to each other is maintained at the time of maintenance The installation position of each device can be determined while considering not to be an obstacle.
- the above-mentioned equipment installation can be performed by disposing the equipment installation area A6 or the substation room SS including a large-sized equipment and which may require a larger crane, away from the other equipment installation areas A1 to A5.
- the arrangement areas of the areas A1 to A5 can be made compact. According to the restriction on the shape of the site where the NG liquefaction apparatus is constructed, at least one of the device installation area A6 and the transformation room SS along the long side of the main pipe rack 31 with other device installation areas A1 to A5 It does not exclude the adoption of the layout arranged side by side. In this case, the device installation area A6 and the transformation room SS may be disposed at the end of the row of other device installation areas A1 to A5 which are not easily restricted by the selection of cranes due to the width of the maintenance access path 4.
- the following effects can be obtained.
- the maintenance access where the size of the accessible maintenance crane 40 is provided with an upper limit Not only at the position in contact with the road 4 but also at other positions, equipment to be maintained is disposed within the range of the working radius of the maintenance crane 40 having a size equal to or less than the upper limit.
- a maintenance crane 4 having a size equal to or less than a preset upper limit is prepared, it is possible to perform maintenance of the devices in the device installation area A1 to A5, and the device arrangement is easy to perform maintenance. There is. Moreover, it is not necessary to widen the width of the maintenance access path 4 in accordance with the maintenance crane larger than the upper limit, and the natural gas liquefier having a compact configuration can be configured.
- a crane larger than the maintenance crane 40 capable of entering the maintenance access path 4 For example, performing maintenance from the outside of the maintenance access path 4 is not prohibited at all. For example, when it is necessary to perform maintenance different from the normal maintenance, such as updating of equipment, maintenance using such a large crane may be performed. Also in this case, during normal maintenance, it is possible to perform maintenance of the equipment in the equipment installation area A1 to A5 using only the relatively small maintenance crane 40. It is not lost.
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Abstract
Description
このためNG液化装置内には、これらの物質に係る種々の処理を実行する機器や、各種流体の移送、一時貯留を行う機器など、多数の機器が配置されている。
そしてモジュールが部分的に覆われた状態となる(partially covered module)ように、熱交換器群の一部(a subset of the plurality of heat exchangers)の配置を行うことにより、コンパクトな機器配置を実現している。
しかしながら、建設後のNG液化装置内における機器のメンテナンスの行い易さも考慮しつつ、限られた機器設置領域内に多数の機器を配置する技術は、特許文献1、2のいずれにも開示されていない。
前記天然ガス液化装置の一部を構成する複数の機器からなる機器群が設置された機器設置領域と、
前記機器設置領域に沿って設けられ、当該機器設置領域に沿って伸びる一方の縁部とは反対の他方の縁部側に障害物が配置されていることにより、予め設定された最大吊り上げ荷重以下の大きさの移動式クレーンであるメンテナンス用クレーンのみが進入して作業を行うことが可能なメンテナンス用進入路と、を備え、
前記機器群に含まれる複数の機器のうち、クレーンを用いてメンテナンスが行われる機器は、前記メンテナンス用進入路の前記一方の縁部を含む前記機器設置領域の境界線に沿って前記メンテナンス用クレーンを配置したとき、当該機器のメンテナンス時に必要な吊り上げ荷重に応じて決まる前記メンテナンス用クレーンの作業半径の範囲内に設置されていることを特徴とする。
(a)前記障害物は、前記機器設置領域を一の機器設置領域としたとき、前記天然ガス液化装置の一部を構成すると共に、当該一の機器設置領域に設置された機器群に含まれる機器とは異なる機器群が設置された他の機器設置領域内の構造物であること。
(b)前記機器設置領域は、前記天然ガス液化装置にて取り扱われる流体が流れる配管を保持する架構構造のメインパイプラックに沿って設けられ、当該メインパイプラックに沿った前記機器設置領域の境界線側からは、前記メンテナンス用クレーンを配置したメンテナンスを行わないことを機器設置位置の設定条件として、前記クレーンを用いてメンテナンスが行われる機器が設置されていること。
(c)(b)において、前記機器設置領域内には、前記機器群にて取り扱われる流体を冷却するための空冷式熱交換器が設けられていること。また、前記天然ガス液化装置を平面視したとき、前記メンテナンス用進入路は、前記メインパイプラックに沿った境界線と交差する方向に伸びるように設けられていること。
(d)(b)において、前記機器設置領域内には、前記機器群にて取り扱われる流体が流れる配管を保持する架構構造のサブパイプラックが設けられていることと、前記天然ガス液化装置を平面視したとき、前記サブパイプラックは、前記メインパイプラックに沿った境界線と交差する方向に伸びるように設けられていることと、前記メンテナンス用進入路に配置されたメンテナンス用クレーンを用いてメンテナンスが行われる機器は、当該サブパイプラックの両脇に設置されていること。
(f)前記機器設置領域内には、前記機器群にて取り扱われる流体が流れる配管を保持する架構構造のサブパイプラックが設けられていることと、前記天然ガス液化装置を平面視したとき、前記サブパイプラックは、前記メインパイプラックに沿った境界線と交差する方向に伸びるように設けられていることと、前記サブパイプラックは、前記機器設置領域から突出するように延伸され、延伸されたパイプラックの末端部に、前記天然ガス液化装置内に設けられた電力消費機器に電力を供給するための変電室が設けられていること。
(g)前記メンテナンス用進入路に進入可能なメンテナンス用クレーンの前記予め設定した最大つり上げ荷重が50トン以下であること。
この結果、予め設定された上限以下の大きさのメンテナンス用クレーンを準備すれば当該機器設置領域内の機器のメンテナンスを行うことが可能であり、メンテナンスの行い易い機器配置となっている。また、メンテナンス用進入路の幅を前記上限よりも大きなメンテナンス用クレーンに合わせて広げる必要がなく、コンパクトな構成の天然ガス液化装置を構成することができる。
図1~7には、LNGの年産量が20~100万トン程度であって、プロパンを主成分とする予冷媒(C3冷媒)によるNGの予冷却や主冷媒の冷却を行わないタイプのNG液化装置に本発明を適用した実施の形態を示す。
また、ガス分離膜が採用されている場合、酸性ガス除去部13は、本体内に多数本の中空糸膜を収容したガス分離ユニットやその付帯設備などの機器群を備える。
冷媒圧縮機21は、昇圧レベルに応じて複数台、直列に設けられ、またこれらの冷媒圧縮機21の設置台数に対応してガスタービン22も複数台、設けられる場合がある。但し、図1においては、これらの冷媒圧縮機21やガスタービン22を各々1つにまとめて記載してある。
後述するように、本例のNG液化装置では、冷媒圧縮機21やガスタービン22に係る機器群は、MCHE151やスクラブカラム152から離れた位置に設置されるため、機器の設置レイアウトの説明にあたっては液化処理部15とは独立して取り扱う。
さらに、図3~8の説明においては、図中に併記したX軸の矢印の原点側を「左手側」、先端側を「右手側」と呼び、Y軸の矢印の原点側を「手前側」、先端側を「奥手側」と呼ぶ場合がある。
既述のように、機器設置領域A5内には図8に示した機器11、131、132以外にも多数の機器が配置されているため、機器設置領域A5内の中央側まで移動式のクレーンを進入させて配置することは困難である。この点、機器設置領域A5の手前側には広い空間が存在するので、メンテナンス対象の機器131、132に到達可能な作業半径を有するクレーンを機器設置領域A5の手前側の区画線に沿って配置することにより、これらの機器131、132のメンテナンスを行うことができる。
そこでこの場合には、機器設置領域A2の左手側の区画線に沿って設けられているメンテナンス用進入路4’内にクレーンを進入させ、機器設置領域A2の左手側の側方位置からメンテナンスを行う。
この場合には、機器設置領域A2の区画線とクレーンの配置位置との間にスペースを設け、機器141b、121から取り外した部品をクレーン側に引き出した後、他の機器が障害にならない位置にて旋回移動による搬送を行うことになる。
ここで図3は、NG液化装置の全体のレイアウトを示す平面図であり、図4~7は各機器設置領域A1、A2、A4、A5内の拡大平面図である。
図2(a)、(b)は、本例の機器の設置位置の決定手法を説明するためにモデル的に示した機器設置領域Aである。機器設置領域Aの外縁側の実線は、当該位置よりも内側に25トンクレーン41を配置することができない境界線を示している。
一方、図3~8に破線で示した区画線は、各機器の設置位置が決定された後の各機器設置領域A1~A6の設備管理上の外縁であり、これら境界線と区画線とは厳密に一致しない場合がある。
当該機器設置領域Aの左手側の境界線の側方には、障害物101が配置され、当該障害物101と機器設置領域Aの左手側の境界線との間は、移動式のメンテナンス用クレーン40を進入させるためのメンテナンス用進入路4となっている。言い替えると、本例では機器設置領域Aの左手側の境界線が、機器設置領域Aに沿って伸びる一方の縁部を構成し、当該とは反対の他方の縁部側に障害物101が配置され、これら2本の縁部に挟まれるようにメンテナンス用進入路4が形成されていると言える。
このとき、下記(表1)に示すように、メンテナンス用クレーン40には、作業時のブームの長さや吊り上げ荷重に応じて吊り上げ作業を行うことが可能な作業半径の制約が存在する。
(表1)
このように、作業半径が大きくなる程、25トンクレーン41により吊り上げることが可能な吊り上げ荷重は小さくなる関係がある。
しかしながら図8の従来のNG液化装置の説明にて問題点を挙げたように、大型のメンテナンス用クレーン40は、NG液化装置内に常時配備することや、外部から自由に調達することが困難であるといった課題がある。
上述の各機器の設置位置の決定手法は、メンテナンス用進入路4に沿って伸びる機器設置領域Aの左手側の境界線に沿った領域に限らず、他の境界線(奥手側の境界線、及び右手側の境界線)に沿った領域にも適用される。
なお、当該前提は、機器の設置位置を決定する際の仮定の条件であり、実際に大型のクレーンを用いてメインパイプラック31を越えて機器のメンテナンスを行うことを完全に排除するものではない。
サブパイプラック100は、メインパイプラック31に保持された配管と、機器設置領域A内の各機器とを繋ぐ配管を保持したり、必要に応じてこれらの配管を流れる流体を冷却する空冷式熱交換器(ACHE:Air-Cooled Heat Exchanger)をその頂部に配置したりすることができる。
また、図4~7中、円形や両端が半円状の細長の輪郭にて示す機器は、塔槽や熱交換器などの静機器を示し、矩形の輪郭にて示す機器はポンプやACHEなどの動機器を示している。
また10トンクレーン42を用いたメンテナンスが行われる第2種吊り上げ機器15a、15bは、図4(b)中に配置位置を例示する10トンクレーン42の各作業半径の範囲内に設置されている。
また機器設置領域A1の奥手側の境界線に沿った領域には、ACHEによって構成される主冷媒クーラー153が配置されている。なお、機器設置領域A1には、将来の生産能力増強時に機器が増設される増設エリアBが確保されている。
また10トンクレーン42を用いたメンテナンスが行われる第2種吊り上げ機器12a、14a、16aは、図4(b)中に配置位置を例示する10トンクレーン42の各作業半径の範囲内に設置されている。
また10トンクレーン42を用いたメンテナンスが行われる第2種吊り上げ機器16b~16eは、図6(b)中に配置位置を例示する10トンクレーン42の各作業半径の範囲内に設置されている。
さらに図3に示すように、サブパイプラック160は、当該機器設置領域A4から突出するように延伸されて分岐パイプラック32を構成し、延伸された分岐パイプラック32の末端部には、NG液化装置内に設けられた電力消費機器に電力を供給するための変電室SSが設けられている。
また10トンクレーン42を用いたメンテナンスが行われる第2種吊り上げ機器13a~13cは、図7(b)中に配置位置を例示する10トンクレーン42の各作業半径の範囲内に設置されている。
また機器設置領域A5内には、メインパイプラック31と交差する方向に伸びるようにサブパイプラック130が配置されている。
これら機器設置領域A6や変電室SS内の機器と機器設置領域A1~A5内の機器を繋ぐ配管や電気ケーブルは、メインパイプラック31から分岐するように設けられた分岐パイプラック32に保持されている。
なお、NG液化装置が建設される敷地形状の制約に応じて、これら機器設置領域A6や変電室SSの少なくとも一方について、メインパイプラック31の長辺に沿って他の機器設置領域A1~A5と並べて配置するレイアウトの採用を排除するものではない。この場合には、機器設置領域A6や変電室SSは、メンテナンス用進入路4の道幅によるクレーンの選択の制約を受けにくい、他の機器設置領域A1~A5の列の末端に配置するとよい。
この場合においても、通常のメンテナンス時においては、比較的小型のメンテナンス用クレーン40のみを用いて機器設置領域A1~A5内の機器のメンテナンスを行うことが可能であるという、本発明の効果は何ら失われるものではない。
100 サブパイプラック
101 障害物
4、4’ メンテナンス用進入路
40 メンテナンス用クレーン
41 25トンクレーン
42 10トンクレーン
Claims (9)
- 天然ガスを液化する天然ガス液化装置において、
前記天然ガス液化装置の一部を構成する複数の機器からなる機器群が設置された機器設置領域と、
前記機器設置領域に沿って設けられ、当該機器設置領域に沿って伸びる一方の縁部とは反対の他方の縁部側に障害物が配置されていることにより、予め設定された最大吊り上げ荷重以下の大きさの移動式クレーンであるメンテナンス用クレーンのみが進入して作業を行うことが可能なメンテナンス用進入路と、を備え、
前記機器群に含まれる複数の機器のうち、クレーンを用いてメンテナンスが行われる機器は、前記メンテナンス用進入路の前記一方の縁部を含む前記機器設置領域の境界線に沿って前記メンテナンス用クレーンを配置したとき、当該機器のメンテナンス時に必要な吊り上げ荷重に応じて決まる前記メンテナンス用クレーンの作業半径の範囲内に設置されていることを特徴とする天然ガス液化装置。 - 前記障害物は、前記機器設置領域を一の機器設置領域としたとき、前記天然ガス液化装置の一部を構成すると共に、当該一の機器設置領域に設置された機器群に含まれる機器とは異なる機器群が設置された他の機器設置領域内の構造物であることを特徴とする請求項1に記載の天然ガス液化装置。
- 前記機器設置領域は、前記天然ガス液化装置にて取り扱われる流体が流れる配管を保持する架構構造のメインパイプラックに沿って設けられ、当該メインパイプラックに沿った前記機器設置領域の境界線側からは、前記メンテナンス用クレーンを配置したメンテナンスを行わないことを機器設置位置の設定条件として、前記クレーンを用いてメンテナンスが行われる機器が設置されていることを特徴とする請求項1に記載の天然ガス液化装置。
- 前記機器設置領域内には、前記機器群にて取り扱われる流体を冷却するための空冷式熱交換器が設けられていることを特徴とする請求項3に記載の天然ガス液化装置。
- 前記天然ガス液化装置を平面視したとき、前記メンテナンス用進入路は、前記メインパイプラックに沿った境界線と交差する方向に伸びるように設けられていることを特徴とする請求項3に記載の天然ガス液化装置。
- 前記機器設置領域内には、前記機器群にて取り扱われる流体が流れる配管を保持する架構構造のサブパイプラックが設けられていることと、
前記天然ガス液化装置を平面視したとき、前記サブパイプラックは、前記メインパイプラックに沿った境界線と交差する方向に伸びるように設けられていることと、
前記メンテナンス用進入路に配置されたメンテナンス用クレーンを用いてメンテナンスが行われる機器は、当該サブパイプラックの両脇に設置されていることと、を特徴とする請求項3に記載の天然ガス液化装置。 - 前記天然ガス液化装置内に設けられた電力消費機器に電力を供給するための変電室と、前記天然ガスを冷却する冷媒を圧縮するための冷媒圧縮機との少なくとも一方は、前記機器設置領域の外部であって、前記メンテナンス用クレーンの予め設定した最大つり上げ荷重の制約を受けない、前記メンテナンス用進入路から離れた位置に設けられていることを特徴とする請求項1に記載の天然ガス液化装置。
- 前記機器設置領域内には、前記機器群にて取り扱われる流体が流れる配管を保持する架構構造のサブパイプラックが設けられていることと、
前記天然ガス液化装置を平面視したとき、前記サブパイプラックは、前記メインパイプラックに沿った境界線と交差する方向に伸びるように設けられていることと、
前記サブパイプラックは、前記機器設置領域から突出するように延伸され、延伸されたパイプラックの末端部に、前記天然ガス液化装置内に設けられた電力消費機器に電力を供給するための変電室が設けられていることと、を特徴とする請求項1に記載の天然ガス液化装置。 - 前記メンテナンス用進入路に進入可能なメンテナンス用クレーンの前記予め設定した最大つり上げ荷重が50トン以下であることを特徴とする請求項1に記載の天然ガス液化装置。
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