DE102009047133A1 - Device for deflation of tank used for temporary storage of liquefied natural gas in e.g. tank ship, has closure cap, axle, linkage and float closing main discharge line if liquid level in tank falls below predetermined level - Google Patents
Device for deflation of tank used for temporary storage of liquefied natural gas in e.g. tank ship, has closure cap, axle, linkage and float closing main discharge line if liquid level in tank falls below predetermined level Download PDFInfo
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- DE102009047133A1 DE102009047133A1 DE102009047133A DE102009047133A DE102009047133A1 DE 102009047133 A1 DE102009047133 A1 DE 102009047133A1 DE 102009047133 A DE102009047133 A DE 102009047133A DE 102009047133 A DE102009047133 A DE 102009047133A DE 102009047133 A1 DE102009047133 A1 DE 102009047133A1
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- Germany
- Prior art keywords
- tank
- discharge line
- main discharge
- predetermined level
- linkage
- 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.)
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- 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
- B65D88/54—Large containers characterised by means facilitating filling or emptying
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- 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
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
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- 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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
- F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
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- 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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/052—Size large (>1000 m3)
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- 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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/054—Size medium (>1 m3)
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- 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
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/01—Reinforcing or suspension means
- F17C2203/011—Reinforcing means
- F17C2203/013—Reinforcing means in the vessel, e.g. columns
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- 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
- F17C2205/035—Flow reducers
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- 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
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- 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
- F17C2221/013—Carbone dioxide
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- 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
- F17C2221/014—Nitrogen
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- 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
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- 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
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- 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
- F17C2221/035—Propane butane, e.g. LPG, GPL
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- 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
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- 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
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- 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
- F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
- F17C2223/042—Localisation of the removal point
- F17C2223/046—Localisation of the removal point in the liquid
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- 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
- F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
- F17C2223/042—Localisation of the removal point
- F17C2223/046—Localisation of the removal point in the liquid
- F17C2223/047—Localisation of the removal point in the liquid with a dip tube
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- 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
- F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
- F17C2225/0146—Two-phase
- F17C2225/0153—Liquefied gas, e.g. LPG, GPL
- F17C2225/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
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- 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
- F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
- F17C2225/033—Small pressure, e.g. for liquefied gas
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- 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
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- 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
- F17C2227/0107—Propulsion of the fluid by pressurising the ullage
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- 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
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- 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
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- 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
- F17C2250/0408—Level of content in the vessel
- F17C2250/0413—Level of content in the vessel with floats
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- 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
- F17C2250/07—Actions triggered by measured parameters
- F17C2250/072—Action when predefined value is reached
- F17C2250/077—Action when predefined value is reached when empty
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- 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
- F17C2260/02—Improving properties related to fluid or fluid transfer
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- 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
- F17C2265/00—Effects achieved by gas storage or gas handling
- F17C2265/03—Treating the boil-off
- F17C2265/032—Treating the boil-off by recovery
- F17C2265/038—Treating the boil-off by recovery with expanding
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- 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
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- 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
- F17C2270/0134—Applications for fluid transport or storage placed above the ground
- F17C2270/0136—Terminals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung und ein Verfahren für ein Entleeren eines Tanks. Insbesondere bezieht sich die Erfindung auf Tanks, die mit kryogenem Flüssiggas gefüllt sind. Erfindungsgemäße Tanks sind vor allem Bestandteil von Tankerschiffen oder in Häfen aufgestellt, um darin Flüssiggas zwecks Zwischenlagerung aufzubewahren. Solche Tanks umfassen ein Volumen von wenigstens mehreren 100 m3, so zum Beispiel wenigstens 500 m3. In der Regel ist aber das Tankvolumen wesentlich größer und liegt bei wenigstens 1000 m3, so zum Beispiel zwischen 5.000 und 20.000 m3. Solche Tanks umfassen wenigstens eine Entladungsleitung, die nahe über dem Grund des Tanks endet.The invention relates to an apparatus and a method for emptying a tank. In particular, the invention relates to tanks filled with cryogenic liquefied petroleum gas. Tanks according to the invention are above all part of tanker ships or set up in harbors in order to store liquefied petroleum gas for temporary storage. Such tanks comprise a volume of at least several 100 m 3 , for example at least 500 m 3 . In general, however, the tank volume is much larger and is at least 1000 m 3 , such as between 5,000 and 20,000 m 3 . Such tanks include at least one discharge conduit that ends near the bottom of the tank.
Wird ein Tank der eingangs genannten Art entleert, also mit anderen Worten entladen, so besteht vor allem bei Tanks mit Lagersteifen (Ringsteifen, welche dem Tank die notwendige Formfestigkeit geben und die Tankkräfte in das schiffsseitige Lager ableiten ) oder anderen strukturellen Elementen das Problem, dass der flüssige Tankinhalt bei Unterschreiten eines bestimmten Flüssigkeitsniveaus nicht mehr schnell genug zur Entladungsleitung fließen kann. Aus diesem Grund muss rechtzeitig vor einer zu großen Niveauabsenkung die Fördermenge abgesenkt werden.If a tank of the type mentioned emptied, that is unloaded in other words, so there is a problem especially in tanks with bearing stiffeners (ring stiffeners, which give the tank the necessary dimensional stability and derive the tank forces in the ship's bearing) or other structural elements the liquid tank contents can not flow fast enough to the discharge line when falling below a certain liquid level. For this reason, the flow rate must be lowered in good time before a too large lowering of the level.
Es ist Aufgabe der Erfindung, ein Verfahren und eine Vorrichtung bereitzustellen, die ein Entleeren eines Tanks der eingangs genannten Art auf einfache technische Weise ermöglichen.It is an object of the invention to provide a method and an apparatus which allow a draining of a tank of the type mentioned in a simple technical way.
Zur Lösung der Aufgabe wird eine Vorrichtung für das Entleeren eines Tanks mit einer in den Tank hinein reichenden Entladungsleitung sowie mit einem Verschlussmittel bereitgestellt, das die Entladungsleitung zumindest teilweise verschließt, wenn ein vorgegebener Füllstand im Tank unterschritten wird. Wird die Entladungsleitung teilweise verschlossen, so wird die Fördermenge reduziert, die durch die Entladungsleitung aus dem Tank herausfließt.To achieve the object, a device for emptying a tank is provided with a discharging line extending into the tank and with a closure means which at least partially closes the discharge line when a predetermined fill level in the tank is undershot. If the discharge line partially closed, the flow rate is reduced, which flows through the discharge line from the tank.
Dieses Ergebnis wird alternativ durch eine Vorrichtung erzielt, die mit einer ersten in den Tank hineinreichenden Hauptentladungsleitung, einer zweiten in den Tank hineinreichenden Nebenentladungsleitung und mit einem Verschlussmittel versehen ist, das die Hauptentladungsleitung verschließt, wenn ein vorgegebener Füllstand im Tank unterschritten wird. Sobald die Hauptentladungsleitung verschlossen wird, kann der Tankinhalt nur noch durch die Nebenentladungsleitung aus dem Tank heraus gefördert werden, was eine Reduzierung des Volumenstroms zur Folge hat. Ein Tank wird dann also langsamer geleert.This result is alternatively achieved by a device which is provided with a first extending into the tank main discharge line, a second extending into the tank side discharge line and with a closure means which closes the main discharge line when a predetermined level in the tank is exceeded. As soon as the main discharge line is closed, the tank contents can only be pumped out of the tank through the secondary discharge line, which results in a reduction of the volume flow. A tank is then emptied slower.
Probleme, die bei Erreichen eines zu niedrigen Füllstands in einem Tank während seiner Entladung auftreten, lassen sich durch die anspruchsgemäße automatische Reduzierung des Volumenstroms vermeiden.Problems that occur when a level in a tank is reached too low during its discharge can be avoided by automatically reducing the volume flow as required.
Bevorzugt ist der Durchmesser der Nebenentladungsleitung kleiner als der Durchmesser der Hauptentladungsleitung und zwar insbesondere mehrfach kleiner. Der Innendurchmesser einer Nebenentladungsleitung beträgt typischerweise 50–80 mm. Der Innendurchmesser einer Hauptentladungsleitung beträgt typischerweise 150–250 mm. Diese Ausgestaltung stellt eine zu gegebener Zeit hinreichend große Reduzierung des Volumenstroms während der Entladung sicher, um so Entladungsprobleme infolge eines zu niedrigen Füllstandes besonders zuverlässig zu vermeiden.Preferably, the diameter of the secondary discharge line is smaller than the diameter of the main discharge line and in particular several times smaller. The inner diameter of a secondary discharge line is typically 50-80 mm. The inner diameter of a main discharge line is typically 150-250 mm. This embodiment ensures a sufficiently large reduction in the volume flow during the discharge at a given time in order to avoid discharge problems as a result of a level that is too low in a particularly reliable manner.
Um den Material- und Platzaufwand sowie die Zahl der in einen Tank hineinführenden Leitungen zu minimieren, mündet die Nebenentladungsleitung in die Hauptentladungsleitung in einer Ausgestaltung der Erfindung ein.In order to minimize the material and space requirements as well as the number of lines leading into a tank, the secondary discharge line opens into the main discharge line in one embodiment of the invention.
In einer Ausgestaltung endet die Nebenentladungsleitung näher am Grund des Tanks im Vergleich zur Hauptentladungsleitung. Es kann so erreicht werden, dass ein zunächst erwünschter großer Volumenstrom nicht deshalb verhindert wird, weil die Hauptentladungsleitung einen sehr geringen Abstand zum Tankboden bzw. Tankgrund aufweist. Es steht außerdem so hinreichend Platz zur Verfügung, um die Hauptentladungsleitung am im Tank befindlichen Ende mit einem Verschlussmittel zu versehen. Da die Nebenentladungsleitung besonders tief bis zum Grund bzw. Tankboden reicht, kann der Tank entsprechend vollständig entleert werden, ohne einen großen technischen Aufwand betreiben zu müssen.In one embodiment, the secondary discharge line ends closer to the bottom of the tank compared to the main discharge line. It can be achieved that an initially desired large volume flow is not prevented because the main discharge line has a very small distance from the tank bottom or tank bottom. In addition, there is sufficient space available to provide the main discharge line at the end located in the tank with a closure means. Since the secondary discharge line extends particularly deep to the bottom or tank bottom, the tank can be completely emptied accordingly, without having to operate a large technical effort.
Das Verschlussmittel umfasst insbesondere einen Schwimmer, mittels dem die entsprechende Entladungsleitung ganz oder teilweise verschlossen wird, sobald ein vorgegebener Füllstand im Tank unterschritten wird. Ein Schwimmer kann zuverlässig das Verschließen bewirken, wenn der vorgegebene Füllstand unterschritten wird, ohne einen großen technischen Aufwand betreiben zu müssen.The closure means comprises in particular a float, by means of which the corresponding discharge line is completely or partially closed as soon as a predetermined level in the tank is reached. A float can reliably cause the closure when the specified level is exceeded, without having to operate a large technical effort.
Mit der Vorrichtung wird insbesondere Flüssiggas wie LNG, LPG, Ethylene, Propylene, NH3, flüssiges CO2, flüssigen Stickstoff oder flüssiger Wasserstoff aus dem Tank über eine Entladungsleitung bzw. die Hauptentladungsleitung entladen, bis der vorgegebene Füllstand unterschritten wird. Im Anschluss daran wird automatisch die Entladungsleitung teilweise oder die Hauptentladungsleitung vollständig verschlossen. Nach dem Verschließen wird das Entladen des Tanks mit verringertem Volumenstrom fortgesetzt wird.In particular, liquid gas such as LNG, LPG, ethylene, propylene, NH 3 , liquid CO 2 , liquid nitrogen or liquid hydrogen is discharged from the tank via a discharge line or the main discharge line until the predetermined fill level is reached. Following this, the discharge line is partially closed or the main discharge line is completely closed automatically. After closing, the unloading of the tank is continued with reduced flow rate.
Um den Tank zu entladen, wird vorzugsweise im Tank ein Überdruck erzeugt. So wird der flüssige Tankinhalt über wenigstens eine Entladungsleitung herausgedrückt. Alternativ kann auch ein zum Beispiel im Tank befindliche Pumpe vorgesehen sein, um den Tankinhalt heraus zu pumpen. Der dafür erforderliche technische Aufwand ist u. a. aufgrund eines erhöhten Wartungsaufwands jedoch höher. To discharge the tank, an overpressure is preferably generated in the tank. Thus, the liquid tank contents is pushed out via at least one discharge line. Alternatively it can also be provided, for example, a pump located in the tank to pump out the tank contents. However, the technical effort required for this is higher due, inter alia, to an increased maintenance effort.
Die Erfindung wird anhand der nachfolgenden Figuren näher erläutert.The invention will be explained in more detail with reference to the following figures.
Es zeigen:Show it:
In der
Die Nebenentladungsleitung
In den Tank mündet eine weitere Leitung
Sinkt der Flüssigkeitspegel
Ein Lagersteifen
Um das Entladen weiter zu beschleunigen, kann die Nebenentladungsleitung
Anstelle von ein oder mehreren Nebenentladungsleitungen
Um diesem Problem zu begegnen, kann die Klappe
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102009047133A DE102009047133A1 (en) | 2009-11-25 | 2009-11-25 | Device for deflation of tank used for temporary storage of liquefied natural gas in e.g. tank ship, has closure cap, axle, linkage and float closing main discharge line if liquid level in tank falls below predetermined level |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102009047133A DE102009047133A1 (en) | 2009-11-25 | 2009-11-25 | Device for deflation of tank used for temporary storage of liquefied natural gas in e.g. tank ship, has closure cap, axle, linkage and float closing main discharge line if liquid level in tank falls below predetermined level |
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Publication Number | Publication Date |
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DE102009047133A1 true DE102009047133A1 (en) | 2011-07-21 |
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DE102009047133A Withdrawn DE102009047133A1 (en) | 2009-11-25 | 2009-11-25 | Device for deflation of tank used for temporary storage of liquefied natural gas in e.g. tank ship, has closure cap, axle, linkage and float closing main discharge line if liquid level in tank falls below predetermined level |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102018217196A1 (en) * | 2018-10-09 | 2020-04-09 | Volkswagen Aktiengesellschaft | Arrangement and method for emptying a liquefied gas pressure tank |
-
2009
- 2009-11-25 DE DE102009047133A patent/DE102009047133A1/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102018217196A1 (en) * | 2018-10-09 | 2020-04-09 | Volkswagen Aktiengesellschaft | Arrangement and method for emptying a liquefied gas pressure tank |
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