EP1978291A1 - 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
EP1978291A1
EP1978291A1 EP07105804A EP07105804A EP1978291A1 EP 1978291 A1 EP1978291 A1 EP 1978291A1 EP 07105804 A EP07105804 A EP 07105804A EP 07105804 A EP07105804 A EP 07105804A EP 1978291 A1 EP1978291 A1 EP 1978291A1
Authority
EP
European Patent Office
Prior art keywords
line
storage volume
transport
transport line
medium
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.)
Granted
Application number
EP07105804A
Other languages
German (de)
English (en)
Other versions
EP1978291B1 (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 method for inerting a transport line used for transporting a cryogenic medium in the solid or liquid state and 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 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.
  • Object of the present invention is therefore to permanently avoid the presence of water in the transport line and also during breaks the Keep temperature inside the transport line as long as possible as low as possible.
  • the method according to the invention is a method for inerting a transport line serving for transporting a cryogenic medium in the solid or liquid state, in which, during the operation of the transport line, a storage volume connected to the transport line or integrated into it is at least partially filled with the transported medium, However, at the beginning of a break in operation is fluidly separated from the transport line or the remaining sections of the transport line, whereupon the remained in the storage volume remaining cryogenic medium and the vaporized medium is introduced at least into one line section or several line sections of the transport line.
  • the transport line is initially kept only slightly above the boiling point or sublimation point at a low temperature which, when the operation resumes, significantly reduces the energy required to cool the transport line to its operating temperature.
  • 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 also achieved with a system for transporting a cryogenic medium in liquid or solid state through a transport line equipped with a flow-connected to the transport line, but against this gas-tight lockable storage volume, which is brought into thermal contact with the outside environment is and has a storage volume with at least a portion of the transport line connecting and equipped with a pressure valve gas line.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
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 true EP1978291A1 (fr) 2008-10-08
EP1978291B1 EP1978291B1 (fr) 2012-07-11

Family

ID=38283254

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)

Country Link
EP (1) EP1978291B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103486442A (zh) * 2013-09-26 2014-01-01 瓮福（集团）有限责任公司 一种无泵输送料浆的装置

Citations (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
EP0926428A2 (fr) * 1997-12-19 1999-06-30 Wiener Stadtwerke Méthode et dispositif pour l'élimination de gaz combustible d'un réseau de distribution du gaz
EP1059482A1 (fr) * 1999-06-08 2000-12-13 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Procédé 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
US20060231144A1 (en) * 2005-04-14 2006-10-19 Mirko Schwan Method of discharging high pressure storage vessels
DE102005057790A1 (de) * 2005-12-03 2007-06-06 Messer France S.A.S Verfahren zum Inertisieren einer Transportleitung mit einem kryogenen Medium und System zum Transportieren von kryogenen Medien

Patent Citations (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
EP0926428A2 (fr) * 1997-12-19 1999-06-30 Wiener Stadtwerke Méthode et dispositif pour l'élimination de gaz combustible d'un réseau de distribution du gaz
EP1059482A1 (fr) * 1999-06-08 2000-12-13 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Procédé 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
US20060231144A1 (en) * 2005-04-14 2006-10-19 Mirko Schwan Method of discharging high pressure storage vessels
DE102005057790A1 (de) * 2005-12-03 2007-06-06 Messer France S.A.S Verfahren zum Inertisieren einer Transportleitung mit einem kryogenen Medium und System zum Transportieren von kryogenen Medien

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103486442A (zh) * 2013-09-26 2014-01-01 瓮福（集团）有限责任公司 一种无泵输送料浆的装置
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

Also Published As

Publication number Publication date
EP1978291B1 (fr) 2012-07-11

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