EP3818295A1 - Tour de chargement et/ou de dechargement equipee d'un dispositif de pulverisation de gaz liquefie - Google Patents
Tour de chargement et/ou de dechargement equipee d'un dispositif de pulverisation de gaz liquefieInfo
- Publication number
- EP3818295A1 EP3818295A1 EP19742455.9A EP19742455A EP3818295A1 EP 3818295 A1 EP3818295 A1 EP 3818295A1 EP 19742455 A EP19742455 A EP 19742455A EP 3818295 A1 EP3818295 A1 EP 3818295A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- loading
- masts
- unloading tower
- unloading
- central
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005507 spraying Methods 0.000 title claims abstract description 35
- 239000007921 spray Substances 0.000 claims abstract description 41
- 239000007788 liquid Substances 0.000 claims description 21
- 238000009434 installation Methods 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 9
- 238000010079 rubber tapping Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 46
- 239000003949 liquefied natural gas Substances 0.000 description 17
- 230000004888 barrier function Effects 0.000 description 11
- 239000012528 membrane Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- CRSOQBOWXPBRES-UHFFFAOYSA-N neopentane Chemical compound CC(C)(C)C CRSOQBOWXPBRES-UHFFFAOYSA-N 0.000 description 2
- 230000000284 resting effect Effects 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- NZZMNINUUFWWNR-UHFFFAOYSA-N CCCCC.CCC(C)C Chemical compound CCCCC.CCC(C)C NZZMNINUUFWWNR-UHFFFAOYSA-N 0.000 description 1
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- F17C13/004—Details of vessels or of the filling or discharging of vessels for large storage vessels not under 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
- 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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
- F17C2223/033—Small pressure, e.g. for liquefied gas
-
- 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
- F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
- F17C2225/04—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by other properties of handled fluid after transfer
- F17C2225/042—Localisation of the filling point
- F17C2225/043—Localisation of the filling point in the gas
- F17C2225/044—Localisation of the filling point in the gas at several points, e.g. with a device for recondensing gas
-
- 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
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/01—Propulsion of the fluid
- F17C2227/0128—Propulsion of the fluid with pumps or compressors
- F17C2227/0135—Pumps
-
- 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
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/01—Propulsion of the fluid
- F17C2227/0128—Propulsion of the fluid with pumps or compressors
- F17C2227/0171—Arrangement
- F17C2227/0178—Arrangement in the vessel
-
- 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
- F17C2260/01—Improving mechanical properties or manufacturing
- F17C2260/011—Improving strength
-
- 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
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0102—Applications for fluid transport or storage on or in the water
- F17C2270/0105—Ships
-
- 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
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0102—Applications for fluid transport or storage on or in the water
- F17C2270/0105—Ships
- F17C2270/0107—Wall panels
Definitions
- the invention relates to the field of sealed and thermally insulating tanks for the storage and / or transport of liquefied gas and relates more particularly to the loading and / or unloading towers intended to be suspended from the ceiling wall of such a tank and making it possible to load liquefied gas into the tank and / or to discharge it.
- loading / unloading towers having a tripod structure, that is to say comprising three vertical masts which are suspended from a cover of a liquid dome and are each fixed to each other. to others by sleepers.
- Each of the vertical masts is hollow.
- two of the masts form an unloading line from the tank and are each associated with an unloading pump carried by the loading / unloading tower, near its lower end.
- the third mast forms an emergency well allowing the descent of an emergency pump and an unloading line in the event of failure of the other unloading pumps.
- the loading / unloading tower also carries loading lines which are not one of the three masts.
- Such loading / unloading towers are for example described in the document FR2785034.
- the masts are subjected to phenomena of contraction and thermal expansion which depend in particular on the conditions of filling of the tank and on the temperature gradients to which they are subjected.
- masts may be subject to different temperature gradients. This is particularly the case when liquefied natural gas is discharged from the tank through one or more of the masts while one or more of the other masts is not crossed by liquefied natural gas.
- the masts are likely to contract differently, which generates significant mechanical stresses on the sleepers and on the cover of the liquid dome and is thus likely to cause irreversible deformation or rupture of the sleepers or the cover of the liquid dome.
- the masts are also liable to be subjected to different temperature gradients when the tank is loaded.
- An idea underlying the invention is to propose a loading and / or unloading tower making it possible to prevent excessively large temperature differences between the masts appear, in particular when liquefied gas is only conveyed through only part of the three masts and / or when loading the tank.
- the invention provides a loading and / or unloading tower for a tank intended for storing liquefied gas, comprising an upper end intended to be suspended from a ceiling wall of said tank and a lower end, said loading and / or unloading tower comprising at least first and second vertical masts which are fixed to one another by crosspieces; said loading and / or unloading tower being further equipped with a liquefied gas spraying device comprising at least first and second nozzles which are respectively capable of projecting liquefied gas according to a first and a second spray cones respectively directed in first and second central directions, the first and second nozzles being arranged such that:
- the first and second central directions each have a vertical component oriented towards the lower end of the loading and / or unloading tower;
- the first and second masts respectively have a surface exposed to the first and to the second spray cones.
- spray cone is understood to mean the zone of extension of the liquefied gas extending from the outlet orifice of a nozzle, said zone having a conical (three-dimensional) shape, as shown for example in the form of a dotted line in FIG. 1, the top of which is situated at the level of this outlet orifice for the nozzle. Additional explanations, with reference to the appended figures, are given below. Consequently, the two spray cones respectively reach the two masts, which makes it possible to cool substantially homogeneously said two masts, in particular before and / or while liquefied gas is discharged from the tank through one or more of the masts. This makes it possible to limit the mechanical stresses likely to be exerted on the sleepers.
- such a loading and / or unloading tower can have one or more of the following characteristics.
- the loading and / or unloading tower further comprises a third vertical mast which is fixed to the first and second masts by crosspieces, the first and second masts defining a prism of triangular section, the device for spraying of liquefied gas comprising a third nozzle which is capable of projecting the liquefied gas in a third central direction, the third nozzle being arranged so that the third mast has a surface exposed to the third spray cone.
- the loading and / or unloading tower may also have only two vertical masts connected to each other by crosspieces.
- the spraying boom when the loading and / or unloading tower comprises three vertical masts, the spraying boom comprises exclusively three nozzles. This optimizes the number of nozzles. However, according to other embodiments, the sprayer boom has a number of nozzles greater than three.
- the first and second nozzles are further arranged so that said exposed surface of each of the first and second masts extends over more than 80% of the height of said mast.
- the third nozzle is further arranged so that said surface of the third mast extends over more than 80% of the height of said third mast.
- the exposed surface of each of the first, second and / or third masts extends over more than 90% of the height of said mast. This allows substantially uniformly cool the masts over most of their height.
- the first, second and third nozzles are further arranged so that all the crosspieces arranged, in a portion of the prism with triangular section extending over at least 80% of the height of the first, second and third masts, have a surface exposed to one or more of the first, second and third spray cones.
- all the sleepers of the loading and / or unloading tower have a surface exposed to one or more of the first, second and third spray cones.
- the surface exposed to one or more of the first, second and third spray cones of each of the cross members extends over the entire length of said cross member.
- the device for spraying liquefied gas comprises a sprayer boom arranged close to the upper end of the loading and / or unloading tower and carrying the first, second and third nozzles.
- the spraying boom comprises a central portion and two lateral portions which are inclined relative to the central portion, the central portion and the two lateral portions being respectively equipped with the first, second and third nozzles.
- the central portion of the spraying boom is arranged parallel to one face of the prism of triangular section defined by the second and third masts and is centered relative to a plane perpendicular to said first face and passing through the first mast.
- the lateral portions are inclined relative to the central portion so as to move away from the first mast.
- the spraying boom is arranged outside the prism of triangular section.
- the first, second and third nozzles are positioned such that the first, second and third central directions each have a horizontal component, the horizontal component of the first central direction being oriented towards the first mast, the component horizontal of the second central direction being oriented towards a face of the triangular section prism which is defined by the first and second masts and the horizontal component of the third central direction being oriented towards a face of the triangular section prism which is defined by the first and third masts.
- the first, second and third central directions each form an angle b which is between 20 and 40 ° relative to the vertical direction.
- the first, second and third nozzles each have a spray angle of between 50 and 80 °.
- the first, second and third nozzles are positioned such that the second and third central directions are, in projection in a horizontal plane, inclined at an angle between 45 and 65 ° relative to the first central direction.
- the first and second nozzles are arranged to project the liquefied gas respectively inside the first and the second masts.
- the third nozzle is arranged to project the liquefied gas respectively inside the third mast.
- the first and second nozzles are each housed in a respective tapping connection opening out inside the first or second mast.
- the first and second masts extend respectively coaxially to a first and to a second central axis and the first and second central directions are respectively oriented parallel to the first and to the second central axis. According to one embodiment, the first and second central directions are respectively oriented coaxially to the first and to the second central axis.
- the first and second masts each have an upper portion intended to protrude above the ceiling wall of said tank and the tapping fittings each open into the upper portion of one of the first and second mast or in a bent portion connected to said upper portion.
- At least one of the first, second and third masts is hollow and is connected to an unloading pump so as to form an unloading line.
- the second and third masts are aligned in a transverse plane P1.
- the transverse plane P1 is parallel to a rear wall of the tank.
- the second mast and the third mast are aligned in a transverse plane.
- the second and third masts are hollow and are each connected to an unloading pump so as to form an unloading line.
- the sprayer boom is connected to a pump capable of compressing the liquefied gas under an operating pressure included in the range of use of the first, second and third nozzles.
- the invention also provides a sealed and thermally insulating tank equipped with an aforementioned loading and / or unloading tower.
- the sealed and thermally insulating tank comprises a liquid dome projecting from the ceiling wall upwards and having a cover, said loading and / or unloading tower being suspended from said cover and the spraying boom being housed inside said liquid dome.
- the liquid dome is a combined dome which further comprises a vapor collecting pipe making it possible to define a vapor circulation path between the interior space of the tank and a vapor collector located outside of tank.
- Such a tank can be part of a terrestrial storage installation, for example to store LNG or be installed in a floating structure, coastal or deep water, in particular an LNG tanker, a floating storage and regasification unit (FSRU) , a floating remote production and storage unit (FPSO), ships using LNG as fuel, namely ships called LFS “LNG Fueled Ships” and others.
- LNG tanker for example to store LNG or be installed in a floating structure, coastal or deep water
- FSRU floating storage and regasification unit
- FPSO floating remote production and storage unit
- a ship for transporting a cryogenic fluid comprises a hull and a said tank arranged in the hull.
- the invention also provides a method of loading or unloading such a ship, in which a fluid is conveyed through insulated pipes from or to a floating or terrestrial storage installation towards or from the tank of the ship.
- the invention also provides a transfer system for a fluid, the system comprising the aforementioned ship, isolated pipes arranged so as to connect the tank installed in the hull of the ship to a floating or land storage installation. and a pump for driving a fluid through the insulated pipes from or to the floating or land storage facility to or from the vessel of the ship.
- FIG. 1 is a partial schematic view of a sealed and thermally insulating tank equipped with a loading / unloading tower.
- FIG. 2 is a top view of said loading / unloading tower which illustrates the device for spraying the liquefied gas and schematically represents the cones for spraying the liquefied gas generated by said spraying device.
- FIG. 3 is a front view of the spray device.
- FIG. 4 is a top view in section of the spraying device according to the plane IV-IV of FIG. 3.
- FIG. 5 is a side view of the spray device.
- FIG. 6 is a schematic cutaway view of an LNG tank and a loading / unloading terminal of this tank.
- FIG. 7 is a top view of the cover of the liquid dome, the arrows schematically illustrating the nozzles of a device for spraying liquefied gas according to another embodiment.
- FIG. 8 illustrates the upper portion of one of the masts according to a variant of the embodiment of Figure 7.
- FIG. 9 is a schematic illustration showing the arrangement of a nozzle at the upper portion of the mast of Figure 8.
- FIG. 10 is a schematic illustration showing the arrangement of a nozzle relative to the upper portion of a mast according to another alternative embodiment.
- an orthonormal coordinate system defined by two axes x and y is used to describe the elements of the loading and / or unloading tower and of the tank.
- the x axis corresponds to a longitudinal direction and the y axis corresponds to a transverse axis perpendicular to the longitudinal direction.
- the x axis advantageously corresponds to the longitudinal direction of the ship.
- the liquefied gas may in particular be a liquefied natural gas (LNG), that is to say a gaseous mixture mainly comprising methane as well as one or more other hydrocarbons, such as ethane, propane, n-butane , i-butane, n-pentane i-pentane, neopentane, and nitrogen in small proportion.
- LNG liquefied natural gas
- the tank 1 is anchored in a support structure 3.
- the support structure 3 is for example formed by the double hull of a ship but can more generally be formed of any type of rigid partition having appropriate mechanical properties.
- the tank 1 may be intended for the transport of liquefied gas or to receive liquefied gas serving as fuel for the propulsion of the ship.
- the tank 1 is a membrane tank.
- each wall successively has, from the outside to the inside, in the thickness direction of the wall, a secondary thermally insulating barrier 4 resting against the support structure 3, a secondary sealing membrane 5 anchored on the secondary thermally insulating barrier 4, a primary thermally insulating barrier 6 resting against the secondary sealing membrane 5 and a primary sealing membrane 7 anchored on the primary thermally insulating barrier 7 and intended to be in contact with the fluid contained in the tank.
- each wall may in particular be of the Mark III type, as described for example in FR2691520, of the N096 type as described for example in FR2877638, or of the Mark V type as described for example in WO14057221.
- Tower 2 is installed in the vicinity of the rear wall 8 of tank 1, which makes it possible to optimize the quantity of cargo capable of being unloaded by tower 2 insofar as the ships are generally leaning backwards in using ballasts in a particular way.
- the tower 2 is suspended from a ceiling wall 9 of the support structure 3.
- the ceiling wall 9 of the support structure comprises, near the rear wall, a space, of rectangular rectangular shape, projecting towards the top, called the liquid dome 10.
- the liquid dome is defined by two transverse walls, front and rear, and by two side walls which extend vertically and project from the ceiling wall 9 upwards.
- the liquid dome 10 further comprises a horizontal cover 35 from which the tower 2 is suspended.
- the liquid dome is a combined dome, that is to say that it further comprises a vapor collecting pipe making it possible to define a vapor circulation path between the interior space of the tank 1 and a vapor collector located outside the tank.
- Tower 2 extends over substantially the entire height of tank 1.
- tower 2 has a tripod structure, that is to say that it has three vertical masts 1 1, 12, 13, which are each fixed to each other by crosspieces 14.
- Each of the masts 11, 12, 13 is hollow and passes through the cover 1 1 of the liquid dome 10.
- the three masts 11, 12, 13 define with the crosspieces 14 a prism of triangular section.
- the three masts 11, 12, 13 are arranged at equal distance from each other so that the section of the prism is an equilateral triangle.
- the three masts 11, 12, 13 are arranged such that at least one of the faces of the prism extends in a transverse plane P1 which is parallel to the rear wall 8 of the tank 1.
- two of the masts 12, 13 are aligned in the transverse plane P1.
- the two masts 12, 13 which are aligned in the transverse plane P1 are the two rear masts, that is to say those closest to the rear wall 8 of the tank 1.
- the front mast 11 has a larger diameter than the two rear masts 12, 13.
- the front mast 1 1 forms a well allowing the descent of a pump and an unloading line.
- the pump lowered via the mast 11 is for example a backup pump in the event of failure of the other unloading pumps or a conventional pump, which facilitates the maintenance of said pump.
- the two rear masts 12, 13 are structural and can each be connected to an unloading pump 15 and form an unloading line.
- the tower 2 is also equipped with two loading lines 16, 17 which are fixed to the mast 13 before.
- One of the two loading lines 16 extends only in the upper portion of the tank 1 while the other loading line 17 extends substantially over the entire height of the tank 1 as close as possible to the bottom wall 18 of the tank 1.
- Tower 2 is also equipped with a spraying device, shown in detail in Figures 2 to 5, which aims to spray liquefied gas on the tower so as to cool it.
- a spraying device shown in detail in Figures 2 to 5, which aims to spray liquefied gas on the tower so as to cool it.
- a spraying device makes it possible to cool the masts 1 1, 12, 13, in particular before and while liquefied gas is discharged from the tank through one or more of the masts 11, 12, 13 or during the step of cooling the tank 1 prior to its loading so as to ensure a certain homogeneity of the temperature gradients to which the three masts 1 1, 12, 13 are subjected.
- This makes it possible to limit the mechanical stresses liable to be exerted on the cross members 14 due to the differences in thermal contraction of the masts 11, 12, 13.
- the spraying device comprises a sprayer boom 19 which is connected to the end of a supply pipe 20, shown in FIG. 3, intended to be supplied with liquefied gas.
- the supply line 20 passes through the cover 35 of the liquid dome 10.
- the supply line 20 is housed in a sheath 21 which passes tightly through the cover 35 of the liquid dome 10.
- the sheath 21 has a cover wall 22 which is equipped with a connector 23 which makes it possible to connect, on the one hand, the supply duct 20 and, on the other hand, another pipe upstream 24 connected to a pump 25, shown schematically in FIGS. 3 and 5.
- the pump 25 which is associated with the upstream pipe 24 and provides the supply of pressurized liquefied gas is arranged, at inside the tank 1, near its bottom wall 18 and thus makes it possible to pump the heel of liquefied gas remaining in the tank 1.
- the supply of liquefied gas to the spraying device can be insured by means in a pump 25 immersed in another tank.
- the pump 25 is capable of compressing the liquefied gas under an operating pressure included in the range of use of the nozzles 26, 27, 28 which will be described below, that is to say the range of use allowing d '' reach the spray angles mentioned below.
- the relative pressure of use of the spraying device is between 100 and 600 kPa (kilo Pascals), preferably between 200 and 300 kPa.
- the spraying boom 19 is arranged near the upper end of the tower 2. More particularly, when the tank 1 is equipped with a liquid dome 10 projecting upward relative to the ceiling wall 9, the boom spray 19 is advantageously housed inside said liquid dome 10.
- the sprayer boom 19 extends in a horizontal plane and has a central portion 29 which extends in a transverse direction and two lateral portions 30, 31 which are inclined towards the rear d 'an angle a.
- the angle a is advantageously between 45 and 65 °.
- the sprayer boom 19 has, viewed in a horizontal plane, a general shape of C directed towards the rear wall of the tank 1.
- the sprayer boom 19 also comprises three nozzles 26, 27, 28 which are respectively associated with the central portion 29 and with one and the other of the two lateral portions 30, 31.
- Each of the three nozzles 26, 27, 28 has a central direction d1, d2, d3 and is capable of projecting the liquefied gas according to a spray cone oriented in the corresponding central direction d1, d2, d3.
- Each of the central directions d1, d2, d3 is oriented perpendicular to the central portion 29 or lateral 30, 31 with which said corresponding nozzle 26, 27, 28 is associated.
- the central directions d2 and d3 are inclined relative to the central direction d1, in projection in a horizontal plane, by an angle corresponding to the aforementioned angle.
- Each central direction d1, d2, d3 has a vertical component oriented towards the lower end of the tower 2 and a horizontal longitudinal component directed towards the front.
- each of the three nozzles 26, 27, 28 is oriented by an angle b which is between 20 and 40 °, for example of the order of 20 ° relative to the direction vertical.
- the horizontal component of the central direction d1 is oriented towards the mast 1 1
- the horizontal component of the central direction d2 is oriented towards the prism face with triangular section defined by the masts 1 1 , 12
- the horizontal component of the central direction d3 is oriented towards the prism face of triangular section defined by the masts 1 1, 13.
- the nozzles 26, 27, 28 advantageously have a spray angle of between 50 and 80 °, for example of the order of 70 °.
- the spray boom 19 is substantially centered with respect to the longitudinal axis of symmetry of the prism.
- the longitudinal axis passing through the axis of the mast 13 passes through the central portion 29 of the spray boom 19.
- the spray boom 19 is disposed slightly behind the transverse plane P1 passing through the central axis of the two rear masts 12, 13, which makes it possible to ensure a spraying of liquefied gas on the crosspieces connecting the rear masts 12, 13.
- FIGS. 1 and 2 To facilitate observation of the three spray cones and their relative position with respect to the towers of the tower, only the upper portion of the spray cones 32, 33, 34 is shown in FIGS. 1 and 2. Thus, when the upper portion of the spray cone 32 delivered by the nozzle 26 associated with the central portion 29 of the spray boom 19 is extended downward, it can be seen in these figures that the mast 1 1 before is also reached by said spray cone 32.
- the three nozzles 26, 27, 28 are arranged to project liquefied gas according to three spray cones 32, 33, 34 which respectively reach the mast 11, the mast 12 and the mast 13.
- each of the three masts 11, 12, 13 has a surface exposed to one of the cones of spraying 32, 33, 34 which extends over more than 80%, and advantageously over more than 90% of the height of said mast 1 1, 12, 13. This makes it possible to cool the masts 1 1, 12 substantially homogeneously, 13 over most of their height.
- the three spray cones 32, 33, 34 are also positioned so that all of the cross members 14 which connect the masts 11, 12, 13 on a portion of the triangular prism corresponding to at least 80% of the height masts 1 1, 12, 13 have a surface exposed to one or more of the spray cones 32, 33, 34.
- all the cross members 14 of the tower 2 have a surface exposed to one or more of the cones of spray.
- the surface exposed to one or more spray cones 32, 33, 34 of each of the crosspieces 14 advantageously extends over the entire length of said crosspieces 14.
- the arrangement of the spraying boom 19 can be pivoted by an angle of 120 ° around the central axis of the prism of triangular section.
- the masts 11, 12, 13 have an upper portion which projects upwards outside the support structure of the tank 1 and more particularly outside the cover 35 of the liquid dome 10
- the upper portion of the masts 11, 12, 13 is connected to a liquefied gas discharge network 39 by one or more bent portions 40, 41, 42.
- the liquefied gas spraying device has three nozzles 36, 37 38, represented schematically by arrows in FIG. 7, which each make it possible to inject liquefied gas into the internal space of one of the three masts 11, 12, 13.
- the three nozzles 36, 37 38 are arranged in line with the upper portion of the masts 11, 12, 13 projecting outside the cover 35 of the liquid dome 7.
- the three nozzles 36, 37, 38 are each connected to a supply duct 43 which is connected to a pump, no represented.
- the pump can be immersed in the tank 1, in another tank or be associated with the loading terminal intended to ensure the loading of the tank 1 in liquefied gas.
- a nozzle 36, 37, 38 according to an alternative embodiment for injecting liquefied gas into the internal space of the masts 1 1, 12, 13.
- the nozzle 36, 37, 38 is mounted in a tapping fitting 43 of tubular shape which opens into a bent portion 40, 41, 42 connecting the end of a mast 11, 12, 13 to the liquefied gas discharge network.
- the stitching connection 43 is arranged at right of the mast 1 1, 12, 13 and oriented vertically.
- the tapping fitting 43 extends in the extension of the central axis A of said mast 11, 12, 13. Also, advantageously, as shown in FIG.
- the central direction d1, d2, d3 of projection of the nozzle 36, 37, 38 is coaxial with the central axis A of said mast 1 1, 12, 13. This makes it possible to ensure excellent homogeneity of the cooling of the mast 11, 12, 13.
- the nozzles 36, 37, 38 advantageously have a spray angle of between 45 and 90 °, for example of the order of 60 °.
- Such an arrangement is particularly advantageous in that the device for spraying liquefied gas is arranged outside the tank, which facilitates its installation.
- the nozzle 36, 37, 38 does not protrude or slightly protrudes inside the bent portion 40, 41, 42 so as to undergo the least possible effort when liquefied gas is discharged through said mast 11, 12, 13.
- the nozzle 36, 37, 38 does not protrude outside the tubular connection or protrudes by a distance less than 10 cm inside the angled portion 40 , 41, 42.
- the tap fitting 43 includes an annular fixing flange 44 against which an annular flange 45 secured to the nozzle 36, 37, 38 is fixed.
- the annular flanges 44, 45 are fixed to each other by means of removable fixing members, such as screws passing through orifices formed in the annular flanges 44, 45.
- FIG. 10 illustrates the arrangement of a nozzle 36, 37, 38 according to another alternative embodiment.
- the connection fitting 43 opens directly into the upper portion of the mast 11, 12, 13 which projects above the cover 35 of the liquid dome 10.
- the connection connection 43 cannot be arranged coaxially to the central axis A of the mast 11, 12, 13 and is therefore arranged perpendicularly (this arrangement not being shown in the appended figures) or in an inclined manner relative to the central axis A of the mast 1 1, 12, 13.
- the central direction d1, d2, d3 of the nozzle 36, 37, 38 is oriented parallel to the central axis A of the mast 11, 12, 13.
- the nozzle 36, 37, 38 in order not to protrude too much inside the mast 11, 12, 13 and thus limit the forces likely to be exerted on the nozzle 36, 37, 38 when liquefied gas is discharged through said mast 11, 12, 13.
- the technique described above for making a loading and / or unloading tower can be used in different types of sealed and thermally insulating tanks, for example for an LNG tank in a land installation or in a floating structure such as an LNG tanker Or other.
- a cutaway view of an LNG carrier 70 shows a sealed and insulated vessel 71 of generally prismatic shape mounted in the double hull 72 of the vessel.
- the wall of the tank 71 comprises a primary waterproof barrier intended to be in contact with the LNG contained in the tank, a secondary waterproof barrier arranged between the primary waterproof barrier and the double hull 72 of the ship, and two insulating barriers arranged respectively between the primary waterproof barrier and the secondary waterproof barrier and between the secondary waterproof barrier and the double shell 72.
- loading / unloading lines 73 arranged on the upper deck of the ship can be connected, by means of appropriate connectors, to a maritime or port terminal for transferring a cargo of LNG from or to the tank 71.
- FIG. 6 represents an example of a maritime terminal comprising a loading and unloading station 75, an underwater pipe 76 and a shore installation 77.
- the loading and unloading station 75 is a fixed offshore installation comprising an arm mobile 74 and a tower 78 which supports the mobile arm 74.
- the mobile arm 74 carries a bundle of insulated flexible pipes 79 which can be connected to the loading / unloading pipes 73.
- the movable arm 74 can be adjusted to suit all LNG carrier sizes .
- a connection pipe, not shown, extends inside the tower 78.
- the loading and unloading station 75 allows the loading and unloading of the LNG carrier 70 from or to the onshore installation 77.
- This comprises liquefied gas storage tanks 80 and connection pipes 81 connected by the submarine pipe 76 to the loading or unloading station 75.
- the submarine pipe 76 allows the transfer of liquefied gas between the loading or unloading station 75 and the shore installation 77 over a long distance, for example 5 km, which makes it possible to keep the LNG carrier 70 at a great distance from the coast during the loading and unloading operations.
- pumps on board the ship 70 and / or pumps fitted to the shore installation 77 and / or pumps fitted to the loading and unloading station 75 are used.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1856227A FR3083589B1 (fr) | 2018-07-06 | 2018-07-06 | Tour de chargement et/ou de dechargement equipee d'un dispositif de pulverisation de gaz liquefie |
PCT/FR2019/051659 WO2020008148A1 (fr) | 2018-07-06 | 2019-07-04 | Tour de chargement et/ou de dechargement equipee d'un dispositif de pulverisation de gaz liquefie |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3818295A1 true EP3818295A1 (fr) | 2021-05-12 |
Family
ID=65031378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19742455.9A Pending EP3818295A1 (fr) | 2018-07-06 | 2019-07-04 | Tour de chargement et/ou de dechargement equipee d'un dispositif de pulverisation de gaz liquefie |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP3818295A1 (fr) |
JP (1) | JP7483636B2 (fr) |
KR (1) | KR20210027350A (fr) |
CN (1) | CN112368508B (fr) |
FR (1) | FR3083589B1 (fr) |
SG (1) | SG11202013110WA (fr) |
WO (1) | WO2020008148A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3114863B1 (fr) * | 2020-10-02 | 2023-01-13 | Gaztransport Et Technigaz | Procédé d’assemblage et installation de cuve de stockage pour gaz liquéfié |
JP7144503B2 (ja) * | 2020-12-22 | 2022-09-29 | 株式会社新来島どっく | 低温配管用特殊貫通ピース |
CN112920938B (zh) * | 2021-02-20 | 2022-06-03 | 山东西王糖业有限公司 | 一种蒸汽喷射装置 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4830412U (fr) * | 1971-08-18 | 1973-04-13 | ||
JPS5247775Y2 (fr) * | 1973-02-19 | 1977-10-29 | ||
FR2691520B1 (fr) | 1992-05-20 | 1994-09-02 | Technigaz Ste Nle | Structure préfabriquée de formation de parois étanches et thermiquement isolantes pour enceinte de confinement d'un fluide à très basse température. |
JP3693276B2 (ja) | 1998-09-17 | 2005-09-07 | 東京瓦斯株式会社 | 温度差を有する気液を配管上で混合するための装置 |
FR2785034B1 (fr) | 1998-10-23 | 2000-12-22 | Gaz Transport & Technigaz | Procede pour eliminer l'evaporation d'un gaz liquefie stocke dans une cuve etanche et isotherme, et dispositif pour sa mise en oeuvre |
JP2001098788A (ja) * | 1999-09-30 | 2001-04-10 | Copros:Kk | 地下埋設型の格納装置 |
FR2877638B1 (fr) | 2004-11-10 | 2007-01-19 | Gaz Transp Et Technigaz Soc Pa | Cuve etanche et thermiquement isolee a elements calorifuges resistants a la compression |
RU2359080C1 (ru) * | 2007-11-26 | 2009-06-20 | Юрий Яковлевич Никулин | Устройство обезвоживания битума |
JP2009243754A (ja) | 2008-03-31 | 2009-10-22 | Nohmi Bosai Ltd | 室外機用補助冷却装置 |
KR20100103266A (ko) * | 2009-03-13 | 2010-09-27 | 삼성중공업 주식회사 | 펌프 타워 |
KR101294276B1 (ko) * | 2010-12-30 | 2013-08-07 | 삼성중공업 주식회사 | 펌프 타워 |
FR2996520B1 (fr) | 2012-10-09 | 2014-10-24 | Gaztransp Et Technigaz | Cuve etanche et thermiquement isolante comportant une membrane metalique ondulee selon des plis orthogonaux |
KR101465951B1 (ko) * | 2013-02-08 | 2014-11-28 | 삼성중공업 주식회사 | 펌프타워구조체 및 이를 갖춘 lng탱크 |
FR3065941A1 (fr) * | 2017-05-05 | 2018-11-09 | Gaztransport Et Technigaz | Procede de manutention d'une cargaison de gaz liquefie et installation de stockage |
-
2018
- 2018-07-06 FR FR1856227A patent/FR3083589B1/fr active Active
-
2019
- 2019-07-04 EP EP19742455.9A patent/EP3818295A1/fr active Pending
- 2019-07-04 WO PCT/FR2019/051659 patent/WO2020008148A1/fr active Application Filing
- 2019-07-04 CN CN201980045410.9A patent/CN112368508B/zh active Active
- 2019-07-04 JP JP2020572685A patent/JP7483636B2/ja active Active
- 2019-07-04 KR KR1020217000088A patent/KR20210027350A/ko not_active Application Discontinuation
- 2019-07-04 SG SG11202013110WA patent/SG11202013110WA/en unknown
Also Published As
Publication number | Publication date |
---|---|
KR20210027350A (ko) | 2021-03-10 |
JP2021530651A (ja) | 2021-11-11 |
FR3083589B1 (fr) | 2022-04-08 |
CN112368508A (zh) | 2021-02-12 |
WO2020008148A1 (fr) | 2020-01-09 |
SG11202013110WA (en) | 2021-01-28 |
CN112368508B (zh) | 2022-11-29 |
JP7483636B2 (ja) | 2024-05-15 |
FR3083589A1 (fr) | 2020-01-10 |
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