EP1978291B1 - Procédé pour inerter une canalisation de transport à l'aide d'un produit cryogénique et système de transport d'un produit cryogénique - Google Patents

Procédé pour inerter une canalisation de transport à l'aide d'un produit cryogénique et système de transport d'un produit cryogénique Download PDF

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Publication number
EP1978291B1
EP1978291B1 EP20070105804 EP07105804A EP1978291B1 EP 1978291 B1 EP1978291 B1 EP 1978291B1 EP 20070105804 EP20070105804 EP 20070105804 EP 07105804 A EP07105804 A EP 07105804A EP 1978291 B1 EP1978291 B1 EP 1978291B1
Authority
EP
European Patent Office
Prior art keywords
line
transport
storage volume
transport line
pressure
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
EP20070105804
Other languages
German (de)
English (en)
Other versions
EP1978291A1 (fr
Inventor
Stéphane Arnoux
Hervé Boisaubert
Grognet Philippe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Messer France SAS
Original Assignee
Messer France SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Messer France SAS filed Critical Messer France SAS
Priority to EP20070105804 priority Critical patent/EP1978291B1/fr
Publication of EP1978291A1 publication Critical patent/EP1978291A1/fr
Application granted granted Critical
Publication of EP1978291B1 publication Critical patent/EP1978291B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/08—Pipe-line systems for liquids or viscous products
    • F17D1/082—Pipe-line systems for liquids or viscous products for cold fluids, e.g. liquefied gas

Definitions

  • the invention relates to a system for transporting cryogenic media.
  • Carbon dioxide particles in the form of pellets or dry ice snow are conveyed to their place of use after being produced in thermally insulated lines.
  • a propellant is usually compressed air, which is due to the low temperatures of the carbon dioxide particles of up to minus 78 ° C previously subjected to a drying process in order to avoid the risk of ice formation.
  • the pressure in the transport line is higher than that in the outside environment; In this way it is avoided that moist outside air enters through possibly existing leaks in the transport line.
  • DE 102 47 505 A1 relates to a device for the treatment of cryogenic fuel, wherein also here the cryogenic fuel is stored in pressure vessels, wherein the fuel can be supplied via a lock of an internal combustion engine.
  • the lock ensures a pressure equalization of the internal combustion engine supplied medium.
  • the object of the present invention is therefore to permanently avoid the presence of water in the transport line and also to keep the temperature inside the transport line as long as possible as low as possible during breaks in operation.
  • the flow connected to the transport line or integrated in this storage volume is at least partially filled with the transported medium, at the beginning of a break, however, fluidly separated from the transport line or the remaining sections of the transport line, whereupon the remaining in the storage volume cryogenic medium evaporates and the vaporized medium is introduced at least into a line section or a plurality of line sections of the transport line.
  • a gas overpressure with respect to the outside atmosphere is formed there.
  • the gas flows into the flow-connected with the storage volume portions of the transport line and displaces any existing moist air there. Due to the continuous supply of the evaporated medium from the storage volume, a slight overpressure is also formed in the flooded sections of the transport line, which also prevents the entry of moist outside air through any leaks.
  • the transport line due to the low temperature of the evaporated cryogenic medium from initially only slightly above the boiling or sublimation held at a low temperature, which significantly reduces the expended to cool the transport line at its operating temperature at resumption of operation.
  • the overpressure generated by the evaporation of the cryogenic medium can also be used to detect a leak in the transport line.
  • the transport line can be subdivided into two, three or more line sections, which can each be supplied together or only partially with evaporated cryogenic medium.
  • the vaporized medium is introduced into the storage volume only when reaching a predetermined limit pressure in the storage volume.
  • Carbon dioxide is preferably used as the cryogenic medium, in particular solid carbon dioxide, which is conveyed in the form of pellets or snow through the transport line. At the beginning of a break in operation carbon dioxide particles remain in the storage volume, which sublime with gradually increasing temperature and inertize the transport line in the manner mentioned.
  • the object of the invention is achieved with a system for transporting a cryogenic medium in liquid or solid state through a transport line, with a transport line through which the cryogenic medium is transported in the liquid or solid state, which is arranged downstream of a conveyor and a plurality of gas-tight having separable line sections, wherein at least one line section is connected to a storage volume, which is in thermal contact with the external environment, wherein a gas line is provided, the storage volume with at least one further Line section of the transport line connects and which is equipped with a pressure control valve.
  • the cryogenic medium During the passage of the cryogenic medium through the transport line so that connected to this flow-connected storage volume is at least partially filled with the cryogenic medium, wherein the medium is at least partially in the liquid or solid state.
  • part of the medium remains in the storage volume. Due to the thermal contact with the environment, the storage volume heats up and the medium in it becomes gaseous. This leads to an increase in pressure inside the storage volume.
  • the pressure valve mounted in the gas line is designed such that it opens above a certain design-dictated or adjustable limit pressure and releases the flow connection between the storage volume and the flow-connected sections of the transport line. As a result, these sections are flooded with the vaporized medium and there is a uniform inerting and cooling of these line sections.
  • the storage volume is fluidically separated in a preferred embodiment of the transport line by means of controllable closing valves, which automatically go on entering the break in their closed state and at the end of the break in their open state.
  • the storage volume is a line section of the transport line itself.
  • this is separated from the remaining line sections in terms of flow, but remains via a separate gas line, which is preferably initially closed by means of the pressure valve. connected with these.
  • the pressure valve With the evaporation or sublimation of the cryogenic medium, the pressure within the separated line section increases. Above a predetermined or selected limit pressure, the gas line is opened by the pressure valve and the evaporated medium flows into the connected line sections, where it ensures inertization.
  • FIG. 1 schematically shows a system according to the invention for transporting a cryogenic medium.
  • the transport system 1 is a device in which carbon dioxide particles are conveyed in the form of pellets or snow by means of compressed air.
  • carbon dioxide particles are used in a variety of fields, for example in the cleaning of surfaces, in the cooling of food products or pharmaceutical preparations, as well as in various applications in the field of chemistry, metallurgy or electronics.
  • the transport system 1 comprises a transport line 2, in which the carbon dioxide particles are conveyed by means of a conveyor 3. Upstream to the conveyor 3, the transport line is connected in a manner not of interest here with a reservoir for the carbon dioxide particles.
  • the transport line 2 is predominantly provided with a thermal insulation 4, which is, however, at least partially interrupted in the region of a line section 5.
  • This line section 5 is by means of control valves 6,7 fluidically separated from the other, completely thermally insulated line sections 9 of the transport line 2. From the line section 5 opens a gas line 8, which are connected via connecting lines 10,11 with further line sections 9 of the transport line 2. At branch points 12,13 connections can be made with other, not shown here line sections.
  • a pressure valve 15 is provided, which releases the gas line 8 above a certain gas pressure in the interior of the line section 5, but below this gas pressure closes.
  • a control unit 16 monitors and controls the motor of the conveyor 3 and the control valves 6,7.
  • the control valves are opened 6.7.
  • the pressure valve 15 is closed.
  • Carbon dioxide particles are conveyed under the action of the conveyor 3 by means of compressed air through the transport line 2.
  • the motor of the conveyor 3 is turned off by a signal of the control unit 16.
  • the line section 5 may also have a geometry suitable for this purpose or be arranged at a particular location within the transport line 2, at which a particularly high accumulation of particles is to be expected.
  • the line section 5 can be widened with respect to the remaining line sections or arranged in the region of a bend in the transport line 2, or an additional volume can be in flow connection with the line section 5, which then acts as the actual storage volume for the carbon dioxide.
  • the conveyor which are also in communication with the control unit 16 in data exchange control valves 6.7 are closed.
  • the line section 5 is thus hermetically separated from the remaining line sections 9 of the transport line 2. Due to the at least partially missing thermal insulation 4 in the region of the line section 5 (or a storage volume connected to the line section), the carbon dioxide particles located in the interior of the line section 5 heat up and sublimate to carbon dioxide gas, which fills the line section 5 with gradually increasing pressure.
  • a predetermined limit pressure opens the pressure valve 15 and The gaseous carbon dioxide flows into the pipe sections 9 of the transport line 2 connected in fluid flow with the gas line 8. This creates an atmosphere of carbon dioxide in the line sections 9 which has a slight overpressure with respect to the outside atmosphere and thus largely prevents the ingress of moist outside air.
  • the pipe sections 9 are cooled by the carbon dioxide gas which, after sublimation, has a temperature of only slightly above minus 78 ° C.
  • the thermally insulated line sections can be kept so cold over a longer period of time effectively.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Claims (5)

  1. Système de transport d'un agent cryogénique à l'état liquide ou solide, le système présentant :
    un conduit de transport (2) par lequel l'agent cryogénique est transporté à l'état liquide ou solide,
    le conduit étant disposé en aval d'un dispositif de transport (3) et présentant plusieurs parties (5, 9) de conduit qui peuvent être séparées les unes des autres de manière étanche aux gaz,
    au moins une partie (5) du conduit étant reliée à un volume de réserve en contact thermique avec l'environnement extérieur,
    un conduit (8) de gaz étant prévu pour relier le volume de réserve (5) à au moins une autre partie (9) du conduit de transport (2) et étant doté d'une soupape (15) de régulation de pression.
  2. Système de transport selon la revendication 1, caractérisé en ce que le volume de réserve (5) peut être séparé en termes d'écoulement du conduit de transport (2) au moyen de robinets de fermeture (6, 7) asservis qui passent automatiquement dans leur position de fermeture au début d'un arrêt de fonctionnement et dans leur position d'ouverture à la fin de l'arrêt de fonctionnement.
  3. Système de transport selon les revendications 1 ou 2, caractérisé en ce qu'une partie du conduit de transport (2) est prévue comme volume de réserve (5).
  4. Système de transport selon l'une des revendications précédentes, caractérisé en ce que la soupape (15) de régulation de pression est configurée de telle sorte que l'agent vaporisé ne soit introduit dans la partie de conduit (9) que si une pression limite prédéterminée est atteinte dans le volume de réserve (5).
  5. Système de transport selon l'une des revendications précédentes, caractérisé en ce que du dioxyde de carbone sous forme de pastilles ou de neige est transporté au moyen d'air comprimé dans le conduit de transport (2).
EP20070105804 2007-04-05 2007-04-05 Procédé pour inerter une canalisation de transport à l'aide d'un produit cryogénique et système de transport d'un produit cryogénique Not-in-force EP1978291B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20070105804 EP1978291B1 (fr) 2007-04-05 2007-04-05 Procédé pour inerter une canalisation de transport à l'aide d'un produit cryogénique et système de transport d'un produit cryogénique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20070105804 EP1978291B1 (fr) 2007-04-05 2007-04-05 Procédé pour inerter une canalisation de transport à l'aide d'un produit cryogénique et système de transport d'un produit cryogénique

Publications (2)

Publication Number Publication Date
EP1978291A1 EP1978291A1 (fr) 2008-10-08
EP1978291B1 true EP1978291B1 (fr) 2012-07-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070105804 Not-in-force EP1978291B1 (fr) 2007-04-05 2007-04-05 Procédé pour inerter une canalisation de transport à l'aide d'un produit cryogénique et système de transport d'un produit cryogénique

Country Status (1)

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EP (1) EP1978291B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103486442B (zh) * 2013-09-26 2016-01-20 瓮福（集团）有限责任公司 一种无泵输送料浆的装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2410833A1 (de) 1974-03-07 1975-09-11 Messer Griesheim Gmbh Einrichtung zur verhinderung der zerstoerung einer leitung
AT405442B (de) * 1997-12-19 1999-08-25 Wiener Stadtwerke Verfahren und anordnung zur entfernung von brenngasen aus gasnetzen
FR2794844B1 (fr) * 1999-06-08 2001-08-03 Air Liquide Procede et dispositif de mise en gaz d'une ligne de distribution de gaz corrosif
DE10247505A1 (de) 2002-10-11 2004-05-06 Bayerische Motoren Werke Ag Vorrichtung zur Aufbereitung von kryogenem Kraftstoff
US20050274127A1 (en) 2004-03-30 2005-12-15 Paul Drube Cryogenic fluid dispensing system
US7426935B2 (en) * 2005-04-14 2008-09-23 Gm Global Technology Operations, Inc. Method of discharging high pressure storage vessels
DE102005057790B4 (de) * 2005-12-03 2010-01-21 Messer France S.A.S Verfahren zum Inertisieren einer Transportleitung und System zum Transportieren von kryogenen Medien

Also Published As

Publication number Publication date
EP1978291A1 (fr) 2008-10-08

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