EP0978682B1 - Vorrichtung zur Bereitstellung einer kryogenen Flüssigkeit - Google Patents

Vorrichtung zur Bereitstellung einer kryogenen Flüssigkeit Download PDF

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Publication number
EP0978682B1
EP0978682B1 EP99114326A EP99114326A EP0978682B1 EP 0978682 B1 EP0978682 B1 EP 0978682B1 EP 99114326 A EP99114326 A EP 99114326A EP 99114326 A EP99114326 A EP 99114326A EP 0978682 B1 EP0978682 B1 EP 0978682B1
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EP
European Patent Office
Prior art keywords
cryogenic liquid
line
consumer
buffer
line part
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.)
Expired - Lifetime
Application number
EP99114326A
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German (de)
English (en)
French (fr)
Other versions
EP0978682A2 (de
EP0978682A3 (de
Inventor
Ottmar Tallafus
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.)
SAUERSTOFFWERK FRIEDRICH GUTTROFF GmbH
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SAUERSTOFFWERK FRIEDRICH GUTTROFF GmbH
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Publication date
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Publication of EP0978682A3 publication Critical patent/EP0978682A3/de
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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
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases 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
    • 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
    • F17C2205/0323—Valves
    • 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
    • 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
    • F17C2250/0439—Temperature

Definitions

  • the invention relates to a device for providing a cryogenic liquid according to the preamble of claim 1, with a storage tank and a supply line, by means of which the cryogenic liquid is passed to a consumer.
  • cryogenic Liquid consuming processes such as tumblers and cutters for Treatment of meat or cooling and frost systems of the case.
  • the cryogenic liquid such as liquid nitrogen (LN 2 ) is thereby provided in a special large-volume storage tank, which is regularly replenished by a company delivering the cryogenic liquid, if necessary.
  • a storage tank is about 2000 to 50,000 liters of this cryogenic liquid.
  • the storage tanks Because of the size of the storage tank or because of the delivery of Cryogenic liquid with special vehicles, the storage tanks must almost always in be arranged at a greater distance from the consumer. The length of the supply line from the storage tank to the consumer can therefore be up to 200 meters.
  • cryogenic liquid per unit time not very large. Frequently, the cryogenic liquid is also in the consumer Supplied to intervals. The cryogenic liquid supplied to the consumer is located therefore often a long time in the supply line.
  • the cryogenic liquid in the supply line does not overheat and in the gaseous state passes, it is necessary to supply the lead with a thermal insulation to provide.
  • insulation costs may amount to approximately DM 800.00 to DM 1,000.00 per meter.
  • a cheaper variant of the insulation is to supply the lead with highly effective To wrap insulating materials.
  • the supply line can still with rock wool be sheathed. With such insulation, however, the costs can always still about DM 500.00 per meter.
  • From US-A-5,771,946 is an arrangement for filling a motor vehicle tank known with cryogenic liquid.
  • the cryogenic Liquid from a primary tank fed to a heat exchanger in which the cryogenic Liquid is heated to saturation. After that she becomes one Car tank headed.
  • the heated cryogenic liquid can first be passed to a cache, by means of a Pressure compensation can be made when the pressure in the motor vehicle tank due to the heating of the cryogenic liquid is greater than in the supply line. Due to the pressure in the motor vehicle tank, the warm cryogenic fluid flows in the cache, where they are with by means of the heat exchanger heated but still cold cryogenic liquid from the primary tank mixed. If the overpressure in the motor vehicle tank has diminished, the motor vehicle tank will become filled with cryogenic liquid, the buffer is constantly Cryogenic liquid is supplied from the primary tank via the heat exchanger. Give advice on avoiding heating of the cryogenic liquid do not refer to the document.
  • a method for transferring a liquefied Gas known in which the liquefied gas is initially a buffer is supplied.
  • the cache then becomes mobile containers fed.
  • the liquefied gas is compressed to a pressure of about 10 to 11 atmospheres, where it heats up to a temperature of about 50 degrees Celsius. Notes on The avoidance of heating of the liquefied gas can be found in the document do not remove.
  • US-A-5,231,838 discloses a refueling station for liquefied gas. in which the liquefied gas from a reservoir via a valve in a buffer is directed.
  • the valve When refueling a motor vehicle, the valve is closed and the pressure in the buffer increases so much that it is greater than the pressure in the motor vehicle tank. After the refueling process is completed, is the pressure in the buffer again lower than the pressure in the storage tank, so that After opening the valve, liquid gas can again flow into the buffer.
  • Advice on avoiding heating of liquefied gas during refueling a motor vehicle can not be found in the document.
  • LPG is from a low-lying reservoir brought to a higher level by means of a gas pump, from which it a liquid pump with gradient tapers.
  • the means of the gas pump from the Steam room of the reservoir extracted vapors are fed to an injector, which is arranged in an intermediate container and between the reservoir and the higher level creates a pressure difference among which we kung the liquefied gas is conveyed from the reservoir to the higher level.
  • Advice on avoiding heating of the liquefied gas during refilling do not refer to the document.
  • a device for transferring liquefied combustible gases known in which the container to be filled initially overfilled and then the amount of liquid exceeding its permitted filling by reversing the liquid flow in the delivery line from him into an intermediate container is transferred.
  • the intermediate container is arranged in a line part, at the next filling so under the action of the transfer pump is that the intermediate container is forcibly emptied.
  • Evidence of avoidance a warming of the liquefied gas during refilling can be the document do not remove.
  • DE 197 04 362 C1 which is to be specified as the next state of the art, is a refueling device for cryogenic fuels in which, within a first storage container, a second storage container is arranged.
  • the volume of the second storage tank is smaller than that Volume of the first storage tank and equal to or greater than the volume the or the storage container of the refueling means to be refueled by the refueling device Vehicle.
  • a buffer is provided, which via a first Conduction part is connected to the storage tank and a second line part connected with the consumer.
  • the cache is similar Way as the storage tank is thermally insulated.
  • the cache whose capacity is usually only a fraction the capacity of the storage tank corresponds, can be because of its low Easily arrange size near the consumer.
  • the first line part, by means of which the buffer is connected to the storage tank is accordingly very long. Regularly, the length of the second line part less than half the length of the first line part. Often it is only a quarter or an eighth. But it can also be less than a tenth.
  • the inventive arrangement it is possible in an advantageous manner, it to refrain from isolating the first line part.
  • the first line part needs thus no longer show any special isolation.
  • the heat loss of the first Line parts can be greater than 20 watts per meter. He can, for example, 30 Watt per meter or even greater than 35 watts per meter, for example 40 Watt per meter be, usually the first line part is possibly with a Protective insulation are provided. So he can with an insulation against corrosion or mechanical damage or protection against contact have the cold line. It only needs the second, very short line part to be isolated. Because the cryogenic liquid supplied to the consumer is in front of the feed only in the second line part. The thermal conductivity The isolation of the second line part, for example, 1 to 2 watts per Meters.
  • the second line part with be provided an insulation.
  • the insulation depends on how much liquid is supplied to the consumer per unit time. Is the amount supplied low, If a very good insulation must be chosen, that is the one supplied to the consumer Amount of liquid large, are not so high isolation requirements too put. Because of the brevity of the second part of the line can even in special cases be completely dispensed insulation of the second line part.
  • the first part of the line does not have to be heat-insulated, a standard line can be used be resorted to. This results in a very large cost advantage. Because, due to the lack of thermal insulation, the first line part is not only easier to manufacture, but can also be much easier handle, so that the line installation much easier. In practice this results in a cost saving of about 90%.
  • the cross section of the first Line parts expediently chosen very large. So it is beneficial for the first pipe part to use a tube with a diameter of about 20 millimeters. But even with a tube with a diameter of 15 millimeters can the cryogenic liquid without significant heating by the first conduit part sent.
  • the first conduit part at its the buffer memory facing End has a branch, by means of which during a first filling phase can be derived in the first part of the pipe located gas. Because, although the cryogenic liquid in the first line part is also present does not heat up significantly during the filling of the buffer, so goes initially a very small part of the cryogenic in the first part of the conduit Liquid in the gaseous state over.
  • the time between two fillings of the cache can be between amount to a few hours and several days.
  • the first line part initially formed gas enters the buffer, it is over the branch past the cache for example, into the open directed. It is particularly expedient that the first line part in his the intermediate storage end facing a valve, by means of which the supply to the buffer during the phase while that in the first line part resulting gas bypassed the branch at the buffer is, is closable.
  • cryogenic liquid in the first line part After the branch is opened and the supply to the buffer closed is, is from the storage tank cryogenic liquid in the first line part directed. This initially escapes the located in the first line part Gas from the first line part. Through the from the storage tank in the first line part guided cryogenic liquid cools the first line part very quickly, whereby the subsequent cryogenic liquid is no longer significantly heated, and remains in its liquid state.
  • a temperature sensor is provided, by means of which the temperature of the at the buffer memory facing the end of the first line part located in the line medium is detected.
  • the Sensors can thus be determined whether there is still gas in the first line part or the first line part already completely back with a cryogenic liquid is filled. Is there again only cryogenic liquid in the first line part, so the supply to the buffer is opened by means of the valve and the branch is closed. As a result, passes through the first line part flowing cryogenic liquid very quickly in the buffer.
  • a storage tank 1 is connected via a first line part 2 'to a buffer 4.
  • the first conduit part 2 ' is connected via a main solenoid valve 10 to an outlet 11 of the storage tank 1.
  • LN 2 liquid nitrogen
  • the liquid nitrogen is passed through an inlet 12 into the storage tank 1.
  • the liquid nitrogen is regularly delivered by tank truck.
  • the storage tank 1 has a capacity of about 30,000 liters. To avoid heating of the liquid nitrogen, the storage tank 1 is thermally insulated by means of high vacuum.
  • the pressure in the storage tank 1 is about 1 to 15 bar, preferably 6 to 7 bar.
  • the first conduit part 2 ' may have a length of 50 to 200 meters.
  • a usual Length of the first line part 2 ' is 70 meters.
  • the cross section of the first line part 2 ' is about 200 square millimeters.
  • the first line part consists of a not heat insulated pipe.
  • a Temperature sensor 6 is provided, by means of which the temperature of the at the point in the first conduit part 2 'located medium can be detected.
  • the temperature can between minus 147 ° C and minus 196 ° C.
  • the first branch is with one Inlet 17, the second branch connected to a second outlet 16.
  • a first solenoid valve 7 In the first Branch are a second Solenoid valve 8 and a third solenoid valve 9 is arranged. Between the second Solenoid valve 8 and the third solenoid valve 9 is a first branch 5th
  • the buffer 4 has a capacity of about 600 liters. He is in similar manner as the storage tank 1 thermally insulated by high vacuum. At one first outlet 15 of the buffer 4, a second conduit part 2 "is connected. The second conduit part 2 '' is about 5 m long and thermally insulated. through of the second line part 2 ", a consumer 3 is connected to the buffer 4.
  • the consumer 3 for example, a tumbler or a refrigerator and Be frost system.
  • the amount of cryogenic liquid required by the consumer 3 can be about 5 to 10 liters per minute. It can be done in intervals of about 5 minutes Duration and 5 minutes break are fed.
  • the consumer 3 supplied cryogenic liquid is via the second line part 2 '' taken from the buffer 4.
  • the pressure in the buffer 4 is about 2 to 5 bar.
  • first is the fifth solenoid valve 13 open and the gas in the second line part 2 '' located the second branch 18 passed into the open.
  • the fifth solenoid valve 13 is closed and the fourth Solenoid valve open, so that the consumer 3 from the beginning cryogenic liquid can be supplied.
  • the main solenoid valve 10 When the buffer 4 is almost empty, the main solenoid valve 10 is opened. Since gas is formed in the first conduit part 2 'because of the long residence time has, first the second solenoid valve 8 is opened and the first solenoid valve. 7 and the third solenoid valve 9 is closed. This ensures that in the first conduit part 2 'located gas during a first filling phase on the first branch 5 flows into the open air. By the storage tank 1 in the first Conduction part 2 'conducted cryogenic liquid cools the first line part 2' very quickly, so that the liquid after a very short time no longer in the gaseous State passes.
  • the third solenoid valve 9 is initially opened, so that the of the in the buffer 4 conducted liquid displaced gas via the second outlet 16 and the first branch 5 can escape. After the buffer 4 sufficient is filled with cryogenic liquid, the first solenoid valve 7 and the third solenoid valve 9 closed again.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Separation By Low-Temperature Treatments (AREA)
EP99114326A 1998-08-05 1999-07-21 Vorrichtung zur Bereitstellung einer kryogenen Flüssigkeit Expired - Lifetime EP0978682B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19835285A DE19835285C1 (de) 1998-08-05 1998-08-05 Vorrichtung zur Bereitstellung einer kryogenen Flüssigkeit
DE19835285 1998-08-05

Publications (3)

Publication Number Publication Date
EP0978682A2 EP0978682A2 (de) 2000-02-09
EP0978682A3 EP0978682A3 (de) 2004-04-28
EP0978682B1 true EP0978682B1 (de) 2005-11-30

Family

ID=7876482

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99114326A Expired - Lifetime EP0978682B1 (de) 1998-08-05 1999-07-21 Vorrichtung zur Bereitstellung einer kryogenen Flüssigkeit

Country Status (4)

Country Link
EP (1) EP0978682B1 (da)
AT (1) ATE311570T1 (da)
DE (2) DE19835285C1 (da)
DK (1) DK0978682T3 (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7596957B2 (en) 2003-07-18 2009-10-06 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Device and method for handling a probe

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE699711C (de) * 1936-01-05 1940-12-20 Julius Pintsch Kom Ges Verfahren zum Umfuellen von verfluessigten brennbaren Gasen, wie beispielsweise Propan, mittels einer Gaspumpe
DE664322C (de) * 1936-06-19 1938-08-25 Julius Pintsch Kom Ges Einrichtung zum Umfuellen von verfluessigten brennbaren Gasen
DE673594C (de) * 1937-10-07 1939-03-24 Julius Pintsch Kom Ges Verfahren zum Umfuellen von verfluessigten Gasen
DE725581C (de) * 1938-11-24 1942-09-25 Julius Pintsch Kom Ges Verfahren zur Entleerung und zur Fuellung von Verbrauchsbehaeltern mit Butan oder anderen Fluessiggasen
NL58397C (da) * 1942-06-08
DE4012600C2 (de) * 1989-05-26 1998-05-14 Leica Ag Mikrotom
US5121609A (en) * 1991-05-17 1992-06-16 Minnesota Valley Engineering No loss fueling station for liquid natural gas vehicles
US5771946A (en) * 1992-12-07 1998-06-30 Chicago Bridge & Iron Technical Services Company Method and apparatus for fueling vehicles with liquefied cryogenic fuel
DE19704362C1 (de) * 1997-02-05 1998-01-02 Linde Ag Betankungseinrichtung für kryogene Kraftstoffe und Verfahren zum Betanken von Fahrzeugen jeder Art mit unterkühlter Flüssigkeit aus einer derartigen Betankungseinrichtung
DE19704361C1 (de) * 1997-02-05 1998-01-02 Linde Ag Betankungseinrichtung für kryogene Kraftstoffe und Verfahren zum abgasfreien Betanken von Fahrzeugen jeder Art mit unterkühlter Flüssigkeit aus einer derartigen Betankungseinrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7596957B2 (en) 2003-07-18 2009-10-06 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Device and method for handling a probe

Also Published As

Publication number Publication date
ATE311570T1 (de) 2005-12-15
DK0978682T3 (da) 2006-03-20
EP0978682A2 (de) 2000-02-09
DE59912855D1 (de) 2006-01-05
DE19835285C1 (de) 2000-01-05
EP0978682A3 (de) 2004-04-28

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