EP1764315B1 - Méthode et système de stockage de pétrole - Google Patents

Méthode et système de stockage de pétrole Download PDF

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Publication number
EP1764315B1
EP1764315B1 EP05020272A EP05020272A EP1764315B1 EP 1764315 B1 EP1764315 B1 EP 1764315B1 EP 05020272 A EP05020272 A EP 05020272A EP 05020272 A EP05020272 A EP 05020272A EP 1764315 B1 EP1764315 B1 EP 1764315B1
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EP
European Patent Office
Prior art keywords
water
oil
oil tank
tank
pool
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.)
Not-in-force
Application number
EP05020272A
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German (de)
English (en)
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EP1764315A1 (fr
Inventor
Zuei-Ling Lin
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Individual
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Individual
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Priority to DE602005020788T priority Critical patent/DE602005020788D1/de
Priority to AT05020272T priority patent/ATE465104T1/de
Priority to EP05020272A priority patent/EP1764315B1/fr
Publication of EP1764315A1 publication Critical patent/EP1764315A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/48—Arrangements of indicating or measuring devices
    • B65D90/50—Arrangements of indicating or measuring devices of leakage-indicating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/78—Large containers for use in or under water

Definitions

  • the present invention relates to an oil storage method and more particularly, to an underwater oil storage method, which keeps the oil tank under the water in a water pool so that the water in the water pool supports the pressure of the oil tank and isolates storage oil from the ground earth by means of the physical characteristic that the specific gravity of oil is lower than water.
  • An oil storage tank may be mounted above or under the ground.
  • a strong floor construction must be built up on the ground.
  • the floor construction must be strong enough to support the heavy cylindrical or spherical steel shell of the oil tank and the oil stored in the oil tank.
  • a conventional oil tank uses a steel shell to bear the pressure of the oil stored therein.
  • the capacity has a limitation. Further, increasing the capacity of an oil tank will relatively increase the cost. For safety's sake, a retaining wall must be built around the oil tank(s) such that when oil leaks out of the oil tank(s), leaked oil can still be kept within the retaining wall to prevent contamination or any possible catastrophe.
  • Formosa Petrochemical Corp.'s oil tank is 130,000 square meters (the largest oil tank in Asia Pacific area. This oil tank has a diameter about 86 meters and a height about 24 meters.
  • the steel shell of the oil tank must strong enough to bear the pressure of 24M-depth storage oil and to provide a damping resistance against earthquake grade 6. It took about 2 years to finish the construction of the oil tank after finish of the ground construction. The total cost for this oil tank is about two hundred millions NT dollars. Because this oil tank is exposed to the weather, it must be regularly maintained to remove rust and regularly painted. In case of a leakage of oil, the storage oil must be fully discharged out of the oil tank and cleaned so that a soldering process can be employed to seal the crevice. Maintaining this oil tank is a hard and expensive task.
  • the document GB 01495 A .D. 1912 discloses a storage plant for inflammable liquids.
  • the storage plant comprises a main basin filled with water; a tank arranged entirely immersed within the water filled in the basin and comprising an opening provided in its bottom side to provide permanent fluid communication between the interior of the tank and the outer basin enclosing the tank; a supply pipe for the supply of inflammable fluid to the tank, ending near a roof of the tank and fitted with a valve; a vent and standpipe extending from the roof of the tank in such a manner that all air or inflammable vapour, which may find its way into the tank or is produced there, escapes freely into the outer air and so that the fluid surface, where evaporation takes place, is reduced to a minimum.
  • the storage plant further comprises a small l water basin arranged aside the main basin; a supply-pipe connecting and providing fluid communication between the small water basin and the main basin; a discharge pit arranged in the vicinity of the main basin; a discharge pipe having a First end extending from a roof of the tank into the tank to below the surface of the water level in the main basin and a second end opening into the discharge pit.
  • the tank In operation of the storage plant, when the tank is emptied, i.e. its contents is allowed to run out, the water penetrates from the basin through the opening into the tank and may fill the tank completely as well as the vent and the standpipe up to the level of the water in the basin.
  • the inflammable fluid is now fed in by way of the supply pipe, the water contained in the tank is pressed out by the entering fluid, through the opening and eventually through an overflow pipe until the tank is filled, whereby the water level in the main basin is essentially kept constant.
  • JP 54 127019 discloses an oil storage plant comprising a main water basin enclosed by a wall structure; an oil tank arranged inside the main water basin and comprising side walls but no bottom wall so that the interior of the oil tank is in permanent fluid communication with the portion of the main water basin enclosing the tank; a small water basin arranged beside the main basin; a pipe connecting the main water basin and the small water basin; and a pump provided in the pipe for pumping water between the main and the small water basin for water circulation therebetween.
  • the volume of oil in the tank decreases by discharge for use, water penetrates into the tank from below through the open bottom side and displaces the discharged oil, and vice versa, oil filled into the tank for storage displaces water out of the tank into the main water basin.
  • JP-10-101 193 discloses an underwater oil storage system according to the preamble of claim 5 which is suited for performing a method according to the preamble of claim 1.
  • the present invention has been accomplished under the circumstances in view. It is therefore the main object of the present invention to provide an underwater oil storage method, which uses water to isolate storage oil from the ground earth by means of the physical characteristic that the specific gravity of oil is lower than water. It is another object of the present invention to provide an underwater oil storage method, which automatically regulates the water level of the water that supports the oil tank, keeping the oil tank in balance. It is still another object of the present invention to provide an underwater oil storage method, which keeps the oil tank under the water in a water pool, preventing contamination of storage oil to the surrounding ground earth, and allowing quick visual inspection upon an oil leakage.
  • the present invention discloses an underwater oil storage method according to claim 1 and an underwater oil tank storage system according to claim 5.
  • the dependent claims relate to advantageous embodiments.
  • an illustrative underwater oil storage method includes the steps of:
  • an auto water control system 52 which is formed of a water pump and a water level sensor is provided for detecting the water level of water W in the water pool 30 and automatically pumping water W out of the water tank 50 into the water pool 30 when the water level of water W in the water pool 30 dropped below a predetermined range. Therefore, the amount of water W in the water pool 3 and oil tank 40 is automatically adjusted subject to the amount of oil O in oil tank 40, enabling water W to support the gravity weight of oil tank 40 and to keep oil tank 40 in balance.
  • water W is used in the water pool 30 to isolate oil O from the ground earth and to support the gravity weight of the oil tank 40 and oil O contained in the oil tank 40 and to keep the oil tank 40 in balance by means of the physical characteristic that the specific gravity of oil O is smaller than water W.
  • the oil tank 40 in the water pool 30 may have the depth of 24 meters.
  • the oil level of oil O in the oil tank 40 may be 2.4 meters above the water level of water W in the water pool 30.
  • water W supports and sets off 90% of the pressure, and the oil tank 40 bears only the other 10% of the pressure. Therefore, when designing the material strength of the material for the oil tank 40, it needs only to consider the pressure of oil O of depth 2.4 meters but not the pressure of oil O of depth 24 meters.
  • the invention breaks the conventional concept of constructing an oil tank with thick steel plate members.
  • an oil tank of volume 130,000 square meters Height 24M x Diameter 86M
  • the desired wall structure 20 is built up, and the designed oil tank 40 can then be set in the water pool 30 thus formed.
  • plastic or stainless steel plate members to construct the wall structure 20 instead of concrete accelerates the construction speed.
  • the oil tank 40 is set in the water pool 30 under the ground, it is not necessary to build up an additional retaining wall to protect the oil tank 40 against earthquake or any human beings' destruction behavior. Because the oil tank 40 is set under the ground, it is safe against human beings' destruction behavior, and storage oil O is free from the effect of the surrounding weather. Further, no lightning arrester or the like is necessary. In case of an earthquake, water W in the water pool 30 absorbs shock waves. Because the oil tank 40 bears a small pressure, the manufacturing cost of the oil tank 40 can be greatly reduced.
  • FIGS. 3A ⁇ 3F show an embodiment of the present invention.
  • the oil tank, referenced by 40a has an oil access port 41 at the top side, however the oil tank 40a has no port at its bottom side.
  • racks 43 are fixedly provided at the bottom wall of the oil tank 40a and supported on the top side of the bottom wall 31 of the water pool 30, allowing water to flow through the bottom side of the oil tank 40a, however storage oil O is prohibited from passing out of the oil tank 40a into water W in the water pool 30.
  • Fig. 4 shows an alternative design of an oil tank which is constantly kept under water and which does not fall within the scope of the claims. According to the alternative embodiment shown in FIG.
  • a top cover 21 is covered on the wall structure 20 to close the water pool 30;
  • the oil tank 40b is fixedly supported on a rack 43' (or racks 43') above the bottom wall 31 of the water pool 30 against floating of water W in the water pool 30, having an oil access port 41, which is comprised of an oil inlet pipe 41a and an oil outlet pipe 41b that are respectively upwardly extending from the top side of the oil tank 40b to the outside of the top cover 21, and an air pipe 41c equipped with a relief valve (not shown) and upwardly extending to the outside of the water pool 30 for discharging of air when the air pressure in the oil tank 40b surpassed a predetermined level.
  • this alternative embodiment is substantially similar to the aforesaid embodiment of the invention with the exception that the water level of water W in the water pool 30 surpasses the elevation of the top side of the oil tank 40b, i.e., the oil tank 40b is constantly kept under water W.
  • the oil tank 40b is mounted on the rack 43' in a tilt angle, having a recessed water reservoir portion 44 at the lowest area on the inside and connected to an external water sensor 45 by a connecting line.
  • a connecting line In case water W leaks in the oil tank 40b, leak-in water will be accumulated in the recessed water reservoir portion 44 and detected by the water sensor 45, and a repair work can be quickly employed to prevent a further damage.
  • the positive pressure type oil tank 40b has a damage and oil O leaks out of the oil tank 40b, leaked oil O will float on water W, and the worker in the gas station can easily find the problem and take the necessary measure to eliminate the problem.
  • this alternative embodiment uses water W to isolate storage oil O from the ground soil, preventing pollution to the surrounding earth. Further, water W is used in the water pool 30 to support the oil tank 40b and the pressure of the storage oil O in the oil tank 40b.
  • the invention provides an underwater oil storage system, which uses water to support an oil tank and storage oil in the oil tank and to keep the oil tank in balance, preventing contact of storage oil with the ground earth.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Claims (7)

  1. Procédé de stockage d'huile dans l'eau comprenant les étapes consistant à :
    a) creuser une cave dans le sol (10) et construire une structure de mur (20) dans ladite cave pour former un bassin d'eau (30) ;
    b) placer un réservoir d'huile (40a) ayant une forme et un volume prédéterminés dans ledit bassin d'eau (30) ;
    c) introduire une quantité prédéterminée d'eau (W) dans ledit bassin d'eau (30) ; et
    d) introduire l'huile (O) devant être stockée dans ledit réservoir d'huile (40) et réguler la quantité d'eau (W) dans ledit bassin d'eau (30) soumise à la quantité d'huile de stockage (O) stockée dans ledit réservoir d'huile (40a), l'huile (O) devant être stockée ayant une densité inférieure à celle de l'eau (W) introduite dans ledit bassin d'eau (30), et la quantité de l'huile de stockage (O) introduite dans le réservoir d'huile (40a) est inférieure au volume du réservoir d'huile (40a),
    caractérisé en ce que l'étape d) comprend le fait de remplir d'eau (W) le bassin d'eau (30) simultanément au remplissage du réservoir d'huile avec de l'huile (O) par la commande d'un système de commande automatique d'eau (52) et dans lequel, lors de l'introduction de l'huile, le niveau d'eau dans le bassin d'eau et le niveau d'huile dans le réservoir d'huile montent de façon synchronisée en utilisant le système de commande automatique d'eau,
    et par une étape e) dans laquelle, lorsque l'on pompe de l'huile dans le réservoir d'huile pour l'utiliser, le système de commande automatique d'eau pompe automatiquement de l'eau pour la faire sortir du bassin d'eau (30), maintenant ainsi la pression d'eau dans le bassin d'eau égale à la pression du réservoir d'huile.
  2. Procédé de stockage d'huile dans l'eau selon la revendication 1, comprenant en outre l'étape consistant à construire un réservoir d'eau de rechange (50) dans le sol (10) sur un côté dudit bassin d'eau (30) et connecter une conduite d'eau (51) entre ledit bassin d'eau (30) et ledit réservoir d'eau de rechange (50) pour permettre la circulation d'eau entre ledit bassin d'eau (30) et ledit réservoir d'eau de rechange (50), dans lequel le système de commande automatique d'eau (52) comprend une pompe à eau et un capteur de niveau d'eau pour détecter le niveau de l'eau (W) dans le bassin d'eau (30).
  3. Procédé de stockage d'huile dans l'eau selon la revendication 2, dans lequel l'étape e) comprend, lors du pompage de l'huile (O) dans le réservoir d'huile (40a) en vue de son utilisation, le fait que le système de commande automatique d'eau (52) pompe automatiquement de l'eau (W) dans le bassin d'eau (30) pour l'introduire dans le réservoir d'eau de rechange (50), maintenant de ce fait la pression de l'eau (W) dans le bassin d'eau (30) égale à la pression du réservoir d'huile (40a).
  4. Système de stockage d'huile dans l'eau comprenant :
    un bassin d'eau (30) défini dans une structure de mur (20) dans la terre (10) pour contenir une quantité prédéterminée d'eau (W) ;
    un réservoir d'huile (40a) placé dans ledit bassin d'eau (30) et entouré par l'eau (W) contenue dans ledit bassin d'eau (30), et destiné à contenir une huile (O) ayant une densité inférieure à celle de l'eau (W) contenue dans ledit bassin d'eau (30) ; et
    un réservoir d'eau de rechange (50) placé sur un côté dudit bassin d'eau (30) et en communication fluide avec ledit bassin d'eau (30) pour réguler le niveau de l'eau contenue dans ledit bassin d'eau (30),
    un système de commande automatique d'eau (52),
    caractérisé en ce que ledit système de commande automatique d'eau est adapté pour commander, simultanément au remplissage du réservoir d'huile (40a) avec de l'huile (O), le remplissage du bassin d'eau (30) avec de l'eau (W),
    et en ce que le système de commande automatique d'eau est utilisé lors de l'introduction d'huile de telle manière que le niveau de l'eau dans le bassin d'eau et le niveau de l'huile dans le réservoir d'huile montent de façon synchronisée,
    moyennant quoi la pression d'eau dans le bassin d'eau est maintenue égale à la pression du réservoir d'huile, et
    le système de commande automatique d'eau (52) est en outre adapté pour pomper automatiquement de l'eau (W) dans le bassin d'eau (30) pour l'introduire dans le réservoir d'eau (50), quand de l'huile (O) est pompée dans le réservoir d'huile (40a) pour être utilisée, afin de maintenir la pression de l'eau (W) présente dans le bassin d'eau (30) égale à la pression du réservoir d'huile (40a).
  5. Système de stockage d'huile dans l'eau selon la revendication 4, dans lequel ledit réservoir d'huile (40a) ne comporte pas d'orifice dans sa face inférieure.
  6. Système de stockage d'huile dans l'eau selon la revendication 4 ou 5, dans lequel ledit réservoir d'huile (40a) comporte un orifice d'accès d'huile (41) dans une partie supérieure de celui-ci pour permettre l'introduction et l'extraction d'huile.
  7. Système de stockage d'huile dans l'eau selon l'une quelconque des revendications 4 à 6, comprenant en outre un châssis (43') destiné à supporter de manière fixe le réservoir d'huile (40a) au-dessus d'une paroi inférieure dudit bassin d'eau (30).
EP05020272A 2005-09-16 2005-09-16 Méthode et système de stockage de pétrole Not-in-force EP1764315B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE602005020788T DE602005020788D1 (de) 2005-09-16 2005-09-16 Methode und System zur Öllagerung
AT05020272T ATE465104T1 (de) 2005-09-16 2005-09-16 Methode und system zur öllagerung
EP05020272A EP1764315B1 (fr) 2005-09-16 2005-09-16 Méthode et système de stockage de pétrole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05020272A EP1764315B1 (fr) 2005-09-16 2005-09-16 Méthode et système de stockage de pétrole

Publications (2)

Publication Number Publication Date
EP1764315A1 EP1764315A1 (fr) 2007-03-21
EP1764315B1 true EP1764315B1 (fr) 2010-04-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05020272A Not-in-force EP1764315B1 (fr) 2005-09-16 2005-09-16 Méthode et système de stockage de pétrole

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EP (1) EP1764315B1 (fr)
AT (1) ATE465104T1 (fr)
DE (1) DE602005020788D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017144068A1 (fr) * 2016-02-23 2017-08-31 Abdelfatah Mohamed Ashry Mohamed Réservoir à toit flottant submersible
CN109779820B (zh) * 2019-02-25 2023-09-01 中国矿业大学 一种废弃露天矿坑的综合利用系统和利用方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US194847A (en) * 1877-09-04 Improvement in oil-tanks
GB191201495A (en) * 1911-01-19 1912-04-25 Hans Christian Erik Bruun Storage Plant for Inflammable Fluids.
DE805866C (de) * 1948-10-02 1951-05-31 Hans Gerdes Dr Ing Behaelter fuer wasserabweisende Fluessigkeiten mit einem spezifischen Gewicht kleiner als 1
JPS54124320A (en) * 1978-03-20 1979-09-27 Kawasaki Heavy Ind Ltd Floating type underground tank
JPS54127019A (en) * 1978-03-24 1979-10-02 Energy Eng Kk Double construction side wall
JP3622364B2 (ja) * 1996-09-25 2005-02-23 清水建設株式会社 液体貯蔵施設

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Publication number Publication date
ATE465104T1 (de) 2010-05-15
EP1764315A1 (fr) 2007-03-21
DE602005020788D1 (de) 2010-06-02

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