EP2696126A2 - High and low pressure pumping systems for cryogenic or liquefied gases - Google Patents

High and low pressure pumping systems for cryogenic or liquefied gases Download PDF

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Publication number
EP2696126A2
EP2696126A2 EP13179474.5A EP13179474A EP2696126A2 EP 2696126 A2 EP2696126 A2 EP 2696126A2 EP 13179474 A EP13179474 A EP 13179474A EP 2696126 A2 EP2696126 A2 EP 2696126A2
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EP
European Patent Office
Prior art keywords
tank
gas
valve
vaporizer
valves
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.)
Withdrawn
Application number
EP13179474.5A
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German (de)
English (en)
French (fr)
Inventor
Ilaria Bernardini
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Individual
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Individual
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Filing date
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Publication of EP2696126A2 publication Critical patent/EP2696126A2/en
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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
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
    • 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
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • 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
    • F17C2221/011—Oxygen
    • 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
    • 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
    • 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
    • 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
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • 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
    • F17C2225/036—Very high pressure, i.e. above 80 bars
    • 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
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0337—Heat exchange with the fluid by cooling
    • F17C2227/0339—Heat exchange with the fluid by cooling using the same fluid
    • 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
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0369—Localisation of heat exchange in or on a vessel
    • F17C2227/0374—Localisation of heat exchange in or on a vessel in the liquid
    • 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
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0388—Localisation of heat exchange separate
    • F17C2227/0393—Localisation of heat exchange separate using a vaporiser
    • 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
    • F17C2227/04—Methods for emptying or filling
    • F17C2227/047—Methods for emptying or filling by repeating a process cycle
    • 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
    • F17C2250/01—Intermediate tanks
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0443—Flow or movement of content
    • 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
    • F17C2250/075—Action when predefined value is reached when full
    • 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
    • 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
    • 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
    • F17C2270/0139—Fuel stations
    • 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
    • F17C2270/02—Applications for medical applications
    • 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
    • F17C2270/05—Applications for industrial use

Definitions

  • bottles containing compressed gas at high pressure such as for example oxygen and nitrogen for technical use or methane for automobile use.
  • gas bottles in order to contain significant quantities of gas, are typically filled at pressures comprised between 200 and 300 bar, and such filling occurs, by compression, usually via two separate methods: 1) directly in gaseous form, by taking the gas from pipes with the help of mechanical compressors, such as for example occurs with methane gas for vehicle engines; 2) by taking the gas in liquid form from cryogenic tanks, which make it possible to store and move large quantities of gas in a reduced space, with the help of pumps that compress the liquefied gas under high pressure in order to transfer it to a vaporization system that can be atmospheric or based on a liquid exchanger.
  • the liquefied gas in passing through the vaporizer, evaporates absorbing the necessary heat from the air or from the liquid of the exchanger itself, in order to typically arrive at a storage/damping at high pressure, which is drawn from by the system for filling the bottles intended for the end user.
  • the aim of the present invention is to improve the system of pumping liquefied cryogenic gases, by enabling the correct delivery of the product at the right pressure with reduced filling times, extremely reduced energy consumption and near-zero maintenance.
  • the principle is very simple, in that it takes advantage of the property of liquefied gases to increase their pressure during the transition from the liquid state to the gaseous state when they are confined in an enclosed volume and their temperature is increased.
  • the system consists in withdrawing from the storage tank, through the difference in pressure, a portion of cryogenic liquefied gas in order to feed it into a small storage tank; subsequently, the liquefied cryogenic gas contained in the small tank will be caused to vaporize, by supplying heat from the environment, and thus obtaining an increase in the pressure and a change of state from liquid to gas; the gas thus obtained, thanks to its pressure, will be transferred to a gas storage tank, balancing out the different pressures between the two.
  • the liquefied cryogenic gas is kept at low temperature (typically from -160 to -190°C depending on the type of gas) in the cryogenic tank 1 with storage pressures of normally just a few bar.
  • the vaporizer 2 which is connected to the downstream usage station, is kept at a pressure comprised between 250 and 300 bar, while the valves V, V1, V2, V3 and V4 are kept closed.
  • the control system commands the closing of the valves V1 and V2 which were previously open.
  • valve V3 In order to transfer the liquefied gas from the tank S to the vaporizer 2, the valve V3 is then opened, which brings the tank S to the same pressure as the vaporizer 2 and as the downstream usage station. Immediately afterwards the valve V4 is also opened. This causes the emptying of the liquefied gas contained in the tank S to the vaporizer, thanks to the simple difference in height between the tank S and the lower part of the vaporizer. Upon reaching the level threshold considered the minimum, the level signaling device L2 commands the closing of the valves V3 and V4.
  • the liquefied gas introduced into the vaporizer will evaporate, restoring the initial pressure conditions of the vaporizer, because the volume of the tank S will be calculated to contain a quantity of liquid gas corresponding to the quantity of gas comprised between the maximum and minimum pressure of the vaporizer.
  • a specific system can be used for measuring the quantity of gas dispensed to the bottles in the filling step. In fact, based on the volume of gas dispensed a control system will decide how many fillings/emptyings of the tank S are necessary to restore the pressure of the vaporizer.
  • the valve V is opened which slowly introduces into the main tank 1 the pressure in the gaseous phase contained in the tank S, making it bubble through the liquid phase of the tank 1 or through an inner coil. This is done in order to lower the temperature of such gas and enable it to condense inside the storage tank 1 without bringing it, little by little, to a state of excess pressure.
  • the valve V is closed again.
  • the liquefied cryogenic gas is kept at a low temperature (typically from -160 to -190°C depending on the type of gas) in the cryogenic tank 1 with typical storage pressures of normally just a few bar, similarly to the previous example.
  • the vaporizer 2 which is connected to the downstream usage station, is normally kept at a pressure comprised between 250 and 300 bar, while all the valves are kept closed. With the withdrawal of gas downstream of the system, for example owing to the filling of bottles, there is naturally a fall in pressure in the vaporizer 2.
  • the control system Upon reaching the preset minimum pressure threshold, the control system commands the opening of the valves V13, V1 and V3, which causes, thanks to the simple "thermosiphon" principle of operation, the filling of the small insulated tank S1 until the level L1, by indicating the presence of the liquid at the preset threshold, commands the closing of the valves V13, V1 and V3 which were previously open.
  • valve V2 In order to transfer the liquefied gas contained in the tank S1 to the vaporizer, the valve V2 is opened, which brings the tank S1 to the same pressure as the vaporizer 2 and immediately afterwards the valve V4 is also opened.
  • the level signaling device L2 commands the closing of the valves V2 and V4.
  • the liquefied gas introduced into the vaporizer will evaporate, restoring the initial pressure conditions of the vaporizer, because the volume of the tank S1 will be calculated to contain a quantity of liquid gas corresponding to the quantity of gas between the maximum and minimum pressure of the vaporizer.
  • a specific system can be used for measuring the quantity of gas dispensed to the bottles to be filled. Based on the volume of gas dispensed, a control system will decide how many fillings/emptyings of the tanks S1 and S2 are necessary to restore the pressure of the vaporizer 2.
  • the level sensor L2 Upon reaching the minimum level of S1 the level sensor L2 interrupts the emptying by closing all the valves that were previously open.
  • the cycle if necessary, proceeds by way of filling the tank S2, i.e. by opening the valves V13, V5 and V8, until the level L3 commands the closing of the three valves that were previously open.
  • valve V9 Only at this point will the valve V9 be opened, which will transfer the gas under high pressure contained in the tank S1, which was previously emptied of the liquid part, by making it bubble slowly through a coil in the tank S2 containing liquefied gas and here, by cooling, much of it will condense in the liquefied gas contained in S2. Upon reaching the same pressure, the valve V9 will be closed and the tank S2 will be emptied in the same way in which the tank S1 was emptied.
  • the tank S1 after the transfer of much of its gas content to the tank S2, discharges the residual excess pressure in the main tank by opening the valve V1 and the valve V12, which will discharge the pressure remaining in S1 into the main storage tank by bubbling it in the liquid phase or through an inner coil in the main cryogenic tank. This is in order to lower the temperature of such residual gas and enable it to condense inside the storage tank thus preventing it from being brought, little by little, to a state of excess pressure.
  • the valves V1 and V12 Upon reaching the equalization of the pressures in the main storage tank and the tank S1, the valves V1 and V12 are closed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP13179474.5A 2012-08-09 2013-08-06 High and low pressure pumping systems for cryogenic or liquefied gases Withdrawn EP2696126A2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000014A ITRA20120014A1 (it) 2012-08-09 2012-08-09 Perfezionamenti negli impianti di pompaggio in alta e bassa pressione di gas criogenici o liquefatti.

Publications (1)

Publication Number Publication Date
EP2696126A2 true EP2696126A2 (en) 2014-02-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP13179474.5A Withdrawn EP2696126A2 (en) 2012-08-09 2013-08-06 High and low pressure pumping systems for cryogenic or liquefied gases

Country Status (2)

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EP (1) EP2696126A2 (it)
IT (1) ITRA20120014A1 (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109455428A (zh) * 2018-12-18 2019-03-12 江苏建友工程机械有限公司 一种用于液氧的二次减压排出型存储装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060218941A1 (en) * 2005-03-30 2006-10-05 Paul Drube Cryogenic fluid dispensing system
EP2457014B1 (de) * 2009-07-22 2013-07-24 LO Solutions GmbH Verfahren zum beladen von verdampfern mit tiefkalt verflüssigten gasen sowie eine vorrichtung zur durchführung dieses verfahrens
JP5752804B2 (ja) * 2010-12-27 2015-07-22 ワルトシラ フィンランド オサケユキチュア 燃料供給システム及び燃料供給システムの運転方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109455428A (zh) * 2018-12-18 2019-03-12 江苏建友工程机械有限公司 一种用于液氧的二次减压排出型存储装置

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