WO2022138628A1 - 液化ガス用真空断熱配管ユニットおよび液化ガス用真空断熱配管の破損検知方法 - Google Patents
液化ガス用真空断熱配管ユニットおよび液化ガス用真空断熱配管の破損検知方法 Download PDFInfo
- Publication number
- WO2022138628A1 WO2022138628A1 PCT/JP2021/047285 JP2021047285W WO2022138628A1 WO 2022138628 A1 WO2022138628 A1 WO 2022138628A1 JP 2021047285 W JP2021047285 W JP 2021047285W WO 2022138628 A1 WO2022138628 A1 WO 2022138628A1
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- WIPO (PCT)
- Prior art keywords
- gas
- pipe
- inner pipe
- outer pipe
- pressure relief
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 10
- 238000001514 detection method Methods 0.000 claims description 66
- 238000012544 monitoring process Methods 0.000 claims description 24
- 238000009413 insulation Methods 0.000 claims description 17
- 230000007423 decrease Effects 0.000 claims description 12
- 238000012546 transfer Methods 0.000 claims description 2
- 238000009530 blood pressure measurement Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 114
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 4
- 239000003949 liquefied natural gas Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000003915 liquefied petroleum gas Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000003542 behavioural effect Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/283—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes for double-walled pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L2201/00—Special arrangements for pipe couplings
- F16L2201/30—Detecting leaks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/06—Arrangements using an air layer or vacuum
- F16L59/065—Arrangements using an air layer or vacuum using vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0352—Pipes
- F17C2205/0355—Insulation thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/012—Hydrogen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
- F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/043—Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/0447—Composition; Humidity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/03—Dealing with losses
- F17C2260/031—Dealing with losses due to heat transfer
Definitions
- the present invention relates to a vacuum insulation piping unit for liquefied gas and a method for detecting damage to a vacuum insulation piping for liquefied gas.
- a double-structured vacuum insulation pipe as a pipe for transferring a liquefied gas such as liquefied natural gas or liquefied hydrogen between, for example, a liquefied gas carrier and a tank on land (for example,).
- a liquefied gas such as liquefied natural gas or liquefied hydrogen
- Patent Document 1 Since this heat insulating pipe has a structure in which the inner pipe is covered with the outer pipe via a vacuum layer, high heat insulating properties can be obtained, and the temperature rise of the low-temperature liquefied gas flowing in the inner pipe is effectively suppressed. be able to.
- An object of the present invention is to detect damage to a vacuum insulation pipe for liquefied gas in a timely and reliable manner with a simple structure in order to solve the above-mentioned problems.
- the vacuum insulation piping unit for liquefied gas is A piping unit for transferring liquefied gas, A vacuum heat insulating pipe including an inner pipe through which the liquefied gas passes and an outer pipe covering the inner pipe via a vacuum layer.
- An inner pipe pressure measuring device that measures the pressure inside the inner pipe
- An outer pipe pressure relief valve provided on the outer pipe
- a gas detection device that detects the type of gas released from the outer pipe pressure relief valve, and To prepare for.
- the liquefied gas storage tank unit is A tank that stores liquefied gas and A piping unit attached to the tank and transferring the liquefied gas between the tank and the outside thereof, the above-mentioned vacuum insulation piping unit for liquefied gas and the above-mentioned vacuum insulation piping unit. It is equipped with.
- the method for detecting damage to the vacuum insulation tube for liquefied gas is A pipe for transferring liquefied gas, which has an inner pipe through which the liquefied gas passes and an outer pipe covering the inner pipe, and a vacuum layer formed between the inner pipe and the outer pipe. It is a method to detect the occurrence of damage to the heat insulating pipe. Monitoring the pressure inside the inner pipe with the inner pipe pressure measuring device that measures the pressure inside the inner pipe, When a peculiar change in the measured value by the inner pipe pressure measuring device is detected, the presence or absence of the operation of the outer pipe pressure relief device provided in the outer pipe is monitored within a predetermined time range.
- the gas detection device detects the release of the gas to be detected, and Based on the measured value of the inner pipe pressure measuring device and the presence or absence of the gas to be detected by the gas detection device, it is determined whether the inner pipe is damaged or the outer pipe is damaged. including.
- FIG. 1 shows a vacuum heat insulating piping unit for liquefied gas (hereinafter, simply referred to as “piping unit”) 1 according to an embodiment of the present invention and a liquefied gas storage tank unit (hereinafter, simply referred to as “tank unit”) including the piping unit 1. ) 3 is shown.
- the piping unit 1 is used for transferring liquefied gas.
- the piping unit 1 includes a vacuum heat insulating pipe (hereinafter, simply referred to as “pipe”) 5 having a double pipe structure. That is, as shown in FIG. 2, the pipe 5 is composed of an inner pipe 7 through which the liquefied gas passes and an outer pipe 9 covering the inner pipe 7.
- the vacuum layer 11 is formed in the radial gap between the inner pipe 7 and the outer pipe 9.
- the piping unit 1 further includes an inner pipe pressure measuring device 13 for measuring the pressure in the inner pipe 7, an outer pipe pressure relief device 15 provided in the outer pipe 9, and a gas released from the outer pipe pressure relief device 15. It is equipped with a gas detection device 17 that detects the type of.
- the tank unit 3 includes a tank 19 for storing liquefied gas and the piping unit 1 attached to the tank 19.
- the liquefied gas is transferred between the tank 19 and the outside thereof, for example, the liquefied gas storage base 21 on land by the pipe 5 of the pipe unit 1.
- the tank unit 3 is installed on a ship 23 such as a liquefied gas carrier. However, the tank unit 3 may be installed on land.
- the liquefied gas stored in the tank 19 and transferred by the pipe 5 is, for example, liquefied petroleum gas (LPG, about ⁇ 45 ° C.), liquefied ethylene gas (LEG, about ⁇ 100 ° C.), and liquefied natural gas (LNG, about ⁇ 100 ° C.). 160 ° C), liquefied hydrogen (LH2, about ⁇ 250 ° C), liquefied helium (LHe, about -270 ° C).
- LPG liquefied petroleum gas
- LEG liquefied ethylene gas
- LNG liquefied natural gas
- LH2 liquefied hydrogen
- LHe liquefied helium
- liquefied hydrogen is stored in the tank 19, and the liquefied hydrogen is transferred via the pipe 5.
- the tank 19 is configured as a double-shell tank having an inner tank and an outer tank.
- a vacuum heat insulating layer is formed between the inner tank and the outer tank.
- the configuration of the tank 19 is not limited to this example.
- the tank 19 may be a vacuum heat insulating layer filled with a powder heat insulating material such as pearlite, which is a granular heat insulating material.
- the tank 19 may be a single-shell tank covered with a heat insulating material.
- the heat insulating material in this case may be composed of, for example, a plurality of vacuum heat insulating panels or a plurality of foam panels.
- the tank 19 has a main body portion 19a which is a portion for accommodating the liquefied gas, and a dome portion 19b protruding upward from the main body portion 19a.
- the piping 5 of the piping unit 1 is attached to the dome portion 19b.
- a plurality of piping units 1 may be provided in one tank 19.
- the pipe 5 extends from the inside of the main body portion 19a to the outside of the tank 19 through the dome portion 19b.
- the portion of the pipe 5 extending to the outside of the dome portion 19b is configured as a vacuum double pipe which will be specifically described below.
- the pipe 5 is formed by connecting a plurality of divided pipe bodies 5a in the length direction.
- each divided pipe body 5a is provided with partition walls 25 at both ends thereof for closing the vacuum layer 11 between the outer pipe 9 and the inner pipe 7.
- sluice valves 27 are provided in the vicinity of both ends of the inner pipe 7 of each split pipe body 5a.
- an outer pipe pressure relief valve more specifically, a seal-off valve is used in this embodiment.
- the seal-off valve which is the outer tube pressure relief device 15, has a cylindrical valve body 31 projecting from the outer peripheral surface of the outer tube 9 and a disk-shaped valve body (not shown) fitted in the inner peripheral portion of the valve body 31. And have.
- An O-ring is attached to the outer peripheral surface of the valve body.
- an outer pipe pressure relief device 15 is provided for each split pipe body 5a.
- the valve body is normally pressed against the valve body 31 by the vacuum pressure of the vacuum layer 11.
- the valve body is fixed to the valve body 31 only by the frictional force between the inner peripheral surface of the valve body 31 and the O-ring. Has been done. That is, in the outer pipe pressure relief device 15, the gas discharge port 37 of the valve body 31 is blocked by the valve body when the pressure in the vacuum layer 11 is less than a predetermined set operating value.
- the set operating value of the outer pipe pressure relief device 15 is a value sufficiently smaller than the pressure resistance design value of the outer pipe 9 (for example, about 1/100 to 1/10 of the pressure resistance design value of the outer pipe 9).
- the outer pipe pressure relief device 15 is not limited to the seal-off valve described above as long as it has a function of discharging gas at a predetermined set operating value, and any device may be used. However, by using an outer pipe pressure relief valve such as a seal-off valve for the outer pipe 9 in which the vacuum layer 11 is formed, the structure of the piping unit 1 can be simplified.
- the inner pipe 7 is provided with an inner pipe pressure relief device (in this example, an inner pipe pressure relief valve) 39.
- an inner pipe pressure relief device 39 is provided on the pressure relief passage 41.
- a spring type safety valve is used as the inner pipe pressure relief device 39.
- a gas detection tape that changes color when contacted with a detection target gas (hydrogen gas in this embodiment) is used.
- the gas detection tape is attached to the gas discharge port 37 of the outer tube pressure relief device 15.
- the cargo handling work from the liquefied gas tank 19 via the pipe 5 is completed, and the on-off valve between the tank 19 and the pipe 5 is closed (that is, the inside of the pipe 5 is liquefied gas). Is not flowing and liquefied gas is stored in the pipe 5). Further, in the following description, the gas stored in the tank 19 and transferred by the pipe 5 which is the target of gas leak detection in the damage detection method may be referred to as “detection target gas”.
- the gas to be detected can be a liquid phase, a gas phase, or a mixed phase thereof.
- the detection target gas G leaks to the vacuum layer 11, the heat insulating performance of the vacuum layer 11 deteriorates, so that the temperature of the detection target gas G rises and vaporizes due to heat input from the outside. As a result, the pressure in the inner pipe 7 once lowered increases. As the pressure inside the inner pipe 7 rises, the detection target gas G further leaks into the outer pipe 9, and the pressure inside the outer pipe 9 also rises.
- the pressure in the inner pipe 7 gradually decreases due to the leakage of the detection target gas G from the inner pipe 7 at the initial stage of the damage. After that, the internal pressure of the inner pipe 7 gradually increases due to the deterioration of the heat insulating performance of the vacuum layer 11. Further, as the temperature of the inner pipe 7 rises due to the deterioration of the heat insulating performance of the vacuum layer 11, the detection target gas G leaked to the vacuum layer 11 expands, and the pressure inside the outer pipe 9 rises.
- the outer pipe pressure relief device 15 When the inner pressure of the outer pipe 9 reaches the set operating value of the outer pipe pressure relief device 15, the outer pipe pressure relief device 15 operates and the detection target gas G is released. At this time, the gas detection device (gas detection tape) 17 attached to the gas discharge port 37 of the outer pipe pressure relief device 15 reacts to the detection target gas G and discolors, and the release of the detection target gas G can be detected. become.
- the air A flowing into the vacuum layer 11 is cooled by the low-temperature inner pipe 7 and reaches the surface of the inner pipe 7. Aggregates as liquefied air A. After that, when the air A further flows in, the temperature on the surface of the inner pipe 7 and the inside of the vacuum chamber rises, and the air A once liquefied is vaporized. Due to the inflow of air A from the outside and the vaporization of liquefied air A, the pressure inside the vacuum layer 11, that is, the outer pipe 9 rises.
- the outer pipe pressure relief device 15 When the inner pressure of the outer pipe 9 reaches the set operating value of the outer pipe pressure relief device 15, the outer pipe pressure relief device 15 operates and air A is discharged. At this time, the gas detection device 17 (gas detection tape) attached to the gas discharge port 37 of the outer pipe pressure relief device 15 does not react to the air A and can detect that the detection target gas G has not been released. Become a state.
- the damage detection method for the pipe 5 is performed by the inner pipe pressure measuring device 13.
- the outer pipe pressure relief device 15 is within a predetermined time range. Monitoring the presence or absence of operation (outer pipe pressure relief device operation monitoring step S2) and detecting the release of the detection target gas by the gas detection device 17 when the outer pipe pressure relief device 15 is operated (target).
- the "unique change" of the value measured by the inner tube pressure measuring device 13 refers to a change behavior different from the continuous low-speed increase of the inner tube 7 internal pressure in the above-mentioned normal state. Specifically, as described above, the rapid change (decrease) in the internal pressure of the inner pipe 7 when the inner pipe 7 is relatively largely damaged, and the internal pressure of the inner pipe 7 when the inner pipe 7 is slightly damaged. A gradual decrease and a rapid change (increase) in the internal pressure of the inner pipe 7 when the outer pipe 9 is damaged are typical examples corresponding to the "unique change".
- the outer pipe pressure relief device 15 is subsequently subjected to the outer pipe pressure relief device operation monitoring step S2.
- the detection target gas G hydrogen gas in this example
- the gas detection device 17 in this example, the gas detection tape attached to the gas discharge port 37 of the outer pipe pressure relief device 15. It is determined that the inner pipe 7 is damaged in the damage occurrence determination step S4 through the step S3 for detecting the above.
- the inner pipe pressure monitoring step S1 it is a detection target as to what kind of behavioral pressure change is detected as "unique” (for example, what speed pressure drop or pressure rise is “moderate” or “rapid”). It is appropriately set by prior experiments and calculations according to the type of gas G, the size of the pipe 5, the size of the tank 19, the amount of gas stored, and the like. Similarly, in the outer pipe pressure relief device operation monitoring step S2, the time range in which the presence or absence of valve operation is to be monitored is appropriately set by prior experiments and calculations.
- the outer tube pressure relief device 15 may not operate. For example, when the damage caused to the inner pipe 7 is minute, such a phenomenon is likely to occur. In order to deal with such a situation, after detecting that a peculiar change has occurred in the measured value of the inner pipe pressure measuring device 13 in the inner pipe internal pressure monitoring step S1, the outer pipe pressure is within a predetermined time range set in advance.
- a step of supplying the detection target gas G from the outside is added to the inner pipe 7. You may. In that case, after the detection target gas G supply step, it is confirmed that the outer pipe pressure relief device 15 has been operated through the outer pipe pressure relief device operation monitoring step S2 again, and the detection target gas G is confirmed by the gas detection device 17. If the release of is detected, it is determined that the inner tube 7 has been damaged.
- the detection target is inside the inner pipe 7 from the outside. Gas G may be supplied.
- the detection target gas G can be supplied by, for example, a cool-down during cargo handling work. Further, in a large liquefied gas carrier equipped with a cool-down facility, gas may be supplied by using the cool-down facility even during the operation of the ship.
- the detection of the detection target gas G release in the target gas release detection step S3 may be performed by a gas detection device 17 other than the gas detection tape attached to the gas discharge port 37 of the outer pipe pressure relief device 15.
- the administrator of the pipe 5 may bring a portable gas detector to the gas discharge port 37 and directly measure the gas to detect the release of the gas G to be detected.
- the inner pipe 7 is not damaged. Since other causes such as leakage from the sluice valve 27 of the inner pipe 7 are suspected, the related parts such as the sluice valve 27 are inspected.
- the pressure inside the inner pipe 7 is measured by measuring the pressure inside the outer pipe. Since it is possible to detect that the relief device 15 is in a state with a high possibility before it actually operates, and further, it is combined with the detection of the type of gas released from the outer pipe pressure relief device 15. With a simple structure, it is possible to detect the occurrence of damage in the pipe 5 in a timely and reliable manner.
- Piping unit 3 Liquefied gas storage tank unit 5 Vacuum insulated piping 7 Inner pipe 9 Outer pipe 11 Vacuum layer 13 Inner pipe pressure measuring device 15 Outer pipe pressure relief valve 17 Gas detection device 19 Tank
Abstract
Description
液化ガスを移送するための配管ユニットであって、
前記液化ガスを通過させる内管と、前記内管を真空層を介して覆う外管とからなる真空断熱配管と、
前記内管内の圧力を計測する内管圧力計測装置と、
前記外管に設けられた外管圧力逃し弁と、
前記外管圧力逃し弁から放出されたガスの種類を検知するガス検知機器と、
を備える。
液化ガスを貯留するタンクと、
前記タンクに取り付けられて、前記タンクとその外部との間で前記液化ガスを移送する配管ユニットであって、上記した液化ガス用真空断熱配管ユニットと、
を備えている。
液化ガスを移送するための配管であって、前記液化ガスを通過させる内管および当該内管を覆う外管を有し、前記内管と前記外管との間に真空層が形成された真空断熱配管の破損の発生を検知する方法であって、
前記内管内の圧力を計測する内管圧力計測装置によって内管内圧力を監視することと、
前記内管圧力計測装置による測定値の特異な変化を検知した場合に、所定の時間範囲内において前記外管に設けられた外管圧力逃し装置の作動の有無を監視することと、
前記外管圧力逃し装置が作動した場合に、ガス検知機器によって、検知対象ガスの放出を検知することと、
前記内管圧力計測装置の測定値および前記ガス検知機器による前記検知対象ガスの放出の有無に基づいて、前記内管の破損の発生または前記外管の破損の発生を判定することと、
を含む。
3 液化ガス貯留タンクユニット
5 真空断熱配管
7 内管
9 外管
11 真空層
13 内管圧力計測装置
15 外管圧力逃し弁
17 ガス検知機器
19 タンク
Claims (7)
- 液化ガスを移送するための配管ユニットであって、
前記液化ガスを通過させる内管および当該内管を覆う外管を有し、前記内管と前記外管との間に真空層が形成された真空断熱配管と、
前記内管内の圧力を計測する内管圧力計測装置と、
前記外管に設けられた外管圧力逃し装置と、
前記外管圧力逃し装置から放出されたガスの種類を検知するガス検知機器と、
を備える液化ガス用真空断熱配管ユニット。 - 請求項1に記載の液化ガス用真空断熱配管ユニットにおいて、
前記外管圧力逃し装置は、外管圧力逃し弁であり、
前記ガス検知機器が、前記外管圧力逃し弁のガス放出口に取り付けられたガス検知テープである、
液化ガス用真空断熱配管ユニット。 - 液化ガスを貯留するタンクと、
前記タンクに取り付けられて、前記タンクとその外部との間で前記液化ガスを移送する配管ユニットであって、請求項1または2に記載の液化ガス用真空断熱配管ユニットと、を備える液化ガス貯留タンクユニット。 - 液化ガスを移送するための配管であって、前記液化ガスを通過させる内管および当該内管を覆う外管を有し、前記内管と前記外管との間に真空層が形成された真空断熱配管の破損の発生を検知する方法であって、
前記内管内の圧力を計測する内管圧力計測装置によって内管内圧力を監視することと、
前記内管圧力計測装置による測定値の特異な変化を検知した場合に、所定の時間範囲内において前記外管に設けられた外管圧力逃し装置の作動の有無を監視することと、
前記外管圧力逃し装置が作動した場合に、ガス検知機器によって、検知対象ガスの放出を検知することと、
前記内管圧力計測装置の測定値および前記ガス検知機器による前記検知対象ガスの放出の有無に基づいて、前記内管の破損の発生または前記外管の破損の発生を判定することと、
を含む、液化ガス用真空断熱管の破損検知方法。 - 請求項4に記載の方法において、
前記内管内圧力の監視において、前記内管圧力計測装置による測定値の前記特異な変化である低下を検知することと、
前記内管圧力測定装置の測定値の低下を検知した後、所定の時間範囲内において前記外管圧力逃し装置の作動の有無を監視することと、
前記外管圧力逃し装置が作動した場合に、前記ガス検知機器によって前記検知対象ガスの放出を検知することにより、前記内管の破損の発生を判定することと、
を含む、液化ガス用真空断熱管の破損検知方法。 - 請求項5に記載の方法において、
前記内管圧力測定装置の測定値の低下を検知した後、所定の時間範囲内に前記外管圧力逃し装置が作動しなかった場合に、前記内管内に、外部から前記検知対象ガスを供給することと、
前記内管内に前記検知対象ガスを供給した後、所定の時間範囲内において前記外管圧力逃し装置の作動の有無を監視することと、
前記外管圧力逃し装置が作動した場合に、前記ガス検知機器によって検知対象ガスの放
出を検知することにより、前記内管の破損の発生を判定することと、
を含む、破損検知方法。 - 請求項4に記載の方法において、
前記内管内圧力の監視において、前記内管圧力計測装置による測定値の前記特異な変化である急速な上昇を検知することと、
前記内管圧力測定装置の測定値の急速な上昇を検知した後、所定の時間範囲内において前記外管圧力逃し装置の作動の有無を監視することと、
前記外管圧力逃し装置が作動した場合に、前記ガス検知機器によって前記検知対象ガスの放出がなかったことを確認することにより、前記外管の破損の発生を判定することと、を含む、液化ガス用真空断熱管の破損検知方法。
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2561667Y2 (ja) * | 1991-10-14 | 1998-02-04 | 石川島播磨重工業株式会社 | 液化ガス受入用ローディングアーム内の不活性ガス置換装置 |
JP2001349499A (ja) * | 2000-06-02 | 2001-12-21 | Ishikawajima Harima Heavy Ind Co Ltd | 低温タンク |
JP2009217695A (ja) * | 2008-03-12 | 2009-09-24 | Taiyo Nippon Sanso Corp | ガス検知装置 |
JP2010133725A (ja) * | 2008-12-02 | 2010-06-17 | Riken Keiki Co Ltd | 光学式ガス検知器 |
JP2015004382A (ja) | 2013-06-19 | 2015-01-08 | 川崎重工業株式会社 | 二重殻タンクおよび液化ガス運搬船 |
JP2016070377A (ja) * | 2014-09-30 | 2016-05-09 | 川崎重工業株式会社 | 液化水素移送システム |
JP2017019552A (ja) * | 2015-07-15 | 2017-01-26 | 川崎重工業株式会社 | 液化水素用ローディングアーム及び液化水素移送方法 |
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2020
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2021
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- 2021-12-21 CN CN202180086086.2A patent/CN116635664A/zh active Pending
- 2021-12-21 KR KR1020237021251A patent/KR20230104987A/ko unknown
- 2021-12-21 WO PCT/JP2021/047285 patent/WO2022138628A1/ja active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2561667Y2 (ja) * | 1991-10-14 | 1998-02-04 | 石川島播磨重工業株式会社 | 液化ガス受入用ローディングアーム内の不活性ガス置換装置 |
JP2001349499A (ja) * | 2000-06-02 | 2001-12-21 | Ishikawajima Harima Heavy Ind Co Ltd | 低温タンク |
JP2009217695A (ja) * | 2008-03-12 | 2009-09-24 | Taiyo Nippon Sanso Corp | ガス検知装置 |
JP2010133725A (ja) * | 2008-12-02 | 2010-06-17 | Riken Keiki Co Ltd | 光学式ガス検知器 |
JP2015004382A (ja) | 2013-06-19 | 2015-01-08 | 川崎重工業株式会社 | 二重殻タンクおよび液化ガス運搬船 |
JP2016070377A (ja) * | 2014-09-30 | 2016-05-09 | 川崎重工業株式会社 | 液化水素移送システム |
JP2017019552A (ja) * | 2015-07-15 | 2017-01-26 | 川崎重工業株式会社 | 液化水素用ローディングアーム及び液化水素移送方法 |
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