EP3081842A1 - Method and device for filling a mobile tank with liquid carbon dioxide - Google Patents

Method and device for filling a mobile tank with liquid carbon dioxide Download PDF

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Publication number
EP3081842A1
EP3081842A1 EP16160181.0A EP16160181A EP3081842A1 EP 3081842 A1 EP3081842 A1 EP 3081842A1 EP 16160181 A EP16160181 A EP 16160181A EP 3081842 A1 EP3081842 A1 EP 3081842A1
Authority
EP
European Patent Office
Prior art keywords
carbon dioxide
storage tank
tank
mobile
liquid carbon
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Withdrawn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
EP16160181.0A
Other languages
German (de)
French (fr)
Inventor
Patrick Matheoud
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
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Filing date
Publication date
Application filed by Messer France SAS filed Critical Messer France SAS
Publication of EP3081842A1 publication Critical patent/EP3081842A1/en
Withdrawn legal-status Critical Current

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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
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/052—Size large (>1000 m3)
    • 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)
    • 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
    • F17C2203/03—Thermal insulations
    • 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
    • F17C2205/01—Mounting arrangements
    • F17C2205/0123—Mounting arrangements characterised by number of vessels
    • F17C2205/0126—One 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0123—Mounting arrangements characterised by number of vessels
    • F17C2205/013—Two or more vessels
    • 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
    • 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
    • F17C2223/035—High pressure (>10 bar)
    • 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
    • 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
    • F17C2225/035—High pressure, i.e. between 10 and 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
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0107—Propulsion of the fluid by pressurising the ullage
    • 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
    • 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
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/044—Avoiding pollution or contamination
    • 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
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/046—Enhancing energy recovery
    • 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
    • F17C2265/01—Purifying the 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
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/03—Treating the boil-off
    • F17C2265/032—Treating the boil-off by recovery
    • F17C2265/033—Treating the boil-off by recovery with cooling
    • F17C2265/034—Treating the boil-off by recovery with cooling with condensing the gas phase
    • 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
    • F17C2265/06—Fluid distribution
    • F17C2265/061—Fluid distribution for supply of supplying vehicles
    • 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
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
    • F17C2270/0171—Trucks
    • 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
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
    • F17C2270/0173—Railways

Definitions

  • the invention relates to a method for filling a mobile tank with liquid carbon dioxide, is filled in the liquid carbon dioxide from a stationary storage tank by means of a feed pump in a mobile tank and simultaneously removed gaseous carbon dioxide from the mobile tank.
  • the invention further relates to a corresponding device.
  • Mobile tanks such as road tankers or rail tank cars, are usually filled in tank farms from stationary installed storage containers, in which the carbon dioxide in the liquid state at a pressure of 15 bar to 17 bar or more is stored. In this case, carbon dioxide gas still in the mobile tank is displaced by the supplied liquid carbon dioxide and removed from the tank.
  • a known from the prior art station for filling liquid carbon dioxide from a storage tank in a mobile tank is in the WO 2005/075882 A1 described.
  • the mobile tank to be refueled is first brought from the storage tank to a pressure by supplying carbon dioxide gas, at which a solidification of the supplied carbon dioxide is excluded.
  • liquid carbon dioxide is introduced from the storage tank into the mobile tank and at the same time carbon dioxide gas is withdrawn from the mobile tank, care being taken, for example with the aid of a compensating vessel, that the said pressure condition in the mobile tank is maintained.
  • the withdrawn carbon dioxide gas is removed at a pressure holding valve in the ambient atmosphere. A not insignificant part of the carbon dioxide is lost in this way unused.
  • the quality of the carbon dioxide gas withdrawn from the mobile tank is not always accurately known;
  • the carbon dioxide special quality requirements such as food quality
  • the withdrawn from the mobile tank gas must not be returned to the storage tank to avoid the risk of contamination of stored in the storage tank carbon dioxide.
  • the WO 02/081963 A1 describes a device for refueling a customer's tank from a mobile supply tank in which it is prevented that the withdrawn during filling from the customer tank carbon dioxide gas is withdrawn into the ambient atmosphere.
  • liquid carbon dioxide is pumped from the mobile supply tank by means of a pump in the customer tank and simultaneously withdrawn carbon dioxide gas from the customer tank.
  • the carbon dioxide gas withdrawn at a pressure above the triple point of carbon dioxide is liquefied at a heat exchanger located within the supply tank in thermal contact with the liquid carbon dioxide in the supply tank and liquefied at an injector downstream of the pump into the liquid carbon dioxide supplied to the customer tank fed.
  • part of the carbon dioxide gas can be reused without contamination of the carbon dioxide in the mobile tank.
  • Object of the present invention is thus to provide a way to refuel mobile tanks for refueling of customer tanks with liquid carbon dioxide, in which the losses of carbon dioxide gas are minimized and also the risk of contamination in the storage tank or in the to be filled Customer tanks present carbon dioxide is minimized.
  • the inventive method is thus characterized in that the withdrawn from the mobile tank gaseous carbon dioxide is brought to a heat exchanger in thermal contact with liquid carbon dioxide from the storage tank, the gaseous carbon dioxide from the mobile tank is at least partially liquefied and then fed to a storage tank, in which is a higher pressure than in the storage tank, and wherein the liquid carbon dioxide from the storage tank at least partially evaporated, then returned to the storage tank and is used to build up pressure in the storage tank.
  • the withdrawn from the mobile tank carbon dioxide gas should have a pressure which corresponds at least to the triple point pressure of carbon dioxide.
  • a further feed pump can optionally be used in order to compress the carbon dioxide gas withdrawn from the mobile tank to a value above the triple point pressure.
  • carbon dioxide is at a lower temperature and lower pressure than the carbon dioxide in the mobile tank.
  • heat is transferred from the carbon dioxide gas withdrawn from the mobile tank to the liquid carbon dioxide from the storage tank during the heat exchange.
  • the liquid carbon dioxide is preferably stored in the storage tank at a pressure of at least 15 bar, preferably at least 18 bar.
  • the carbon dioxide has a temperature between -15 ° C and -20 ° C.
  • the pressure in the storage tank is higher, preferably between 1 bar and 2 bar higher than in the storage tank.
  • the present in the storage tank carbon dioxide gas is at least partially liquefied and returned as liquid carbon dioxide in the storage tank during the filling process. This process can take place during the filling of the mobile tank if necessary, continuously or at regular intervals.
  • the object of the invention is also achieved with a device having the features of claim 5.
  • a device for filling a mobile tank with liquid carbon dioxide comprises a thermally insulated, stationary storage tank for storing liquid carbon dioxide, a filling line connectable to a mobile tank for conveying liquid carbon dioxide from the storage tank into the mobile tank, a feed pump arranged in the filling line and a gas exhaust duct connectable to the mobile tank for exhausting carbon dioxide gas from the mobile tank and being characterized in that the gas exhaust duct discharges into a thermally insulated liquid carbon dioxide storage tank, wherein in the gas exhaust duct a heat exchanger is arranged to provide thermal communication between the tank Produces carbon dioxide gas in the gas discharge line and a liquid phase of stored in the storage tank carbon dioxide.
  • the storage tank is usually a stationary in a tank farm or installed in the area of a carbon dioxide generating tank, from the several mobile tanks can be filled simultaneously or in chronological order.
  • the storage tank is a low-pressure tank with a capacity between 100 t and 1000 t, is stored in the liquid carbon dioxide at a pressure between 15 and 20 bar and a temperature between minus 20 ° C and minus 35 ° C.
  • the mobile tank is a tank designed to fill tanks or individual containers permanently installed in remote consumers.
  • the mobile tank is a road tanker or a railroad tank car.
  • the heat exchanger is an indirect heat exchanger in which heat is transferred from the mobile tank to liquid carbon dioxide from the storage tank at a heat exchanger surface heat from the carbon dioxide gas.
  • the carbon dioxide is present at a higher pressure than in the storage tank.
  • the carbon dioxide gas condenses in the gas discharge line at least partially and is then collected in the storage tank.
  • liquid carbon dioxide evaporates from the storage tank and according to the invention is used to contribute to maintaining a predetermined minimum operating pressure in the storage tank, for example 15 bar to 18 bar.
  • the heat exchanger is preferably arranged in a circulation line connected to the storage tank.
  • the circulation line conveys liquid carbon dioxide to the heat exchanger, in which the liquid carbon dioxide at least partially evaporates due to the thermal contact with the warmer carbon dioxide gas in the gas discharge line.
  • the at least partially vaporized carbon dioxide is then returned to the headspace of the storage tank where it forms a gaseous phase.
  • a feed pump is required in the circulation line, upstream of the heat exchanger, to pump liquid carbon dioxide to the heat exchanger.
  • the heat exchanger is arranged below the level of the liquid level, the liquid flows Carbon dioxide under the action of gravity to the heat exchanger, and a feed pump is dispensable in the circulation line.
  • the heat exchanger in the gas discharge line relative to the storage tank. If the heat exchanger is arranged above the level of a liquid level of liquefied carbon dioxide present in the storage tank, the carbon dioxide liquefied in the heat exchanger can flow into the storage tank under the effect of gravity. If, on the other hand, the heat exchanger is arranged below the level of a liquid level in the storage tank, the carbon dioxide condensed in the heat exchanger must be supplied to the storage tank by means of a feed pump arranged downstream of the heat exchanger in the gas discharge line.
  • the heat exchanger is arranged within a liquid phase of the stored carbon dioxide in the storage tank.
  • a promotion of the liquid carbon dioxide to the heat exchanger by means of a conveyor is unnecessary.
  • the gas discharge line is guided in a coil through the interior of the reservoir, wherein the walls of the coil are in thermal contact with the liquid phase of the carbon dioxide in the reservoir and act in this way as a heat exchanger surface.
  • the inventive method and the device according to the invention are characterized in particular by the fact that when filling the mobile tank neither carbon dioxide gas is released into the ambient atmosphere nor carbon dioxide with undesirable admixtures (contaminated carbon dioxide) in the reservoir and / or the mobile tank is enriched.
  • the inventive method is thus particularly suitable for filling mobile tanks with liquid carbon dioxide of a particular quality level, for example of food-grade carbon dioxide, for transfer to customer tanks.
  • FIG. 1 schematically shows a device according to the invention for filling a mobile tank with liquid carbon dioxide.
  • the device 1 comprises a thermally well insulated and pressure-resistant configured storage tank 2, in the embodiment, a low-pressure tank in which liquid carbon dioxide at a pressure between 15 and 20 bar and a temperature between minus 20 ° C and minus 35 ° C is stored.
  • the storage tank 2 is for example part of a plurality of permanently installed storage tanks having tank farm.
  • the storage tank 2 is used for storing liquid carbon dioxide, which must meet special quality requirements, such as food quality.
  • From the bottom area of the storage tank 2 is a thermally insulated and pressure-resistant filling line 3, in which a feed pump 4 is installed.
  • the filling line 3 opens into a filling connection 5 which can be connected to a mobile tank 6, in the exemplary embodiment a road tanker.
  • the mobile tank 6, in which the carbon dioxide is transported in the liquid state serves to supply (not shown here) customer tanks with liquid carbon dioxide.
  • the device 1 further comprises a gas discharge line 8, which is connectable to the mobile tank 6 at a gas discharge connection 9 arranged in an upper area of the mobile tank 6. At its opposite end from the gas outlet connection 9, the gas discharge line 8 opens into a storage tank 10 for the recovery of gaseous carbon dioxide from the mobile tank 6.
  • the device 1 further comprises a carbon dioxide circulation line 12, which opens out of a lower region of the storage tank 2 and opens into an upper region of the storage tank 2.
  • a feed pump 13 serves to convey liquid carbon dioxide in the circulation line 12.
  • the circulation line 12 and the gas discharge line 8 pass through a heat exchanger 15 which has a heat exchanger surface, at which the guided through the circulation line 12 and the gas discharge line 8 carbon dioxide can be brought into indirect thermal contact ,
  • the pressure in the storage tank 10 is higher than the pressure in the storage tank 2. Also, within the heat exchanger 15, the pressure in the pipe portion of the circulation pipe 12 is lower than the pressure in the pipe portion of the gas discharge pipe 8.
  • a mobile tank 6 to be filled is first connected to the filling connection 5 and the gas discharge connection 9 to the device 1.
  • the mobile tank 6 prevail during the refueling operation pressure and temperature conditions above the triple point of carbon dioxide.
  • liquid carbon dioxide from the storage tank 2 is conveyed by means of the feed pump 4 in the mobile tank 6.
  • the liquid carbon dioxide introduced into the mobile tank 6 collects in a liquid phase 17 and at the same time displaces gaseous carbon dioxide from a gas phase 18 present in the mobile tank 6.
  • the displaced gaseous carbon dioxide flows through the gas discharge line 8 to the heat exchanger 15, in which it makes thermal contact is brought with the guided in the circuit 12 liquid carbon dioxide.
  • liquid carbon dioxide from the present in the storage tank 2 liquid phase 19 is guided by means of the pump 13 to the heat exchanger 15, evaporates at the thermal contact with the gaseous carbon dioxide in the gas discharge line 8 at least partially and enters a present in the storage tank 2 gas phase 20.
  • carbon dioxide can be removed from the gas phase 20, liquefied and then fed to the liquid phase 19 in the storage tank 2 via a device 21 for re-liquefaction, which is not described here in more detail.
  • the heat exchanger 15 is above the level of a level 22 of a present in the storage tank 2 liquid phase 19 and above the level of a level 23 of a liquid phase 24 present in the storage tank 10.
  • the pump 13 is required to deliver liquid carbon dioxide to the heat exchanger 15, while at the same time the condensed in the heat exchanger 15 carbon dioxide in the gas discharge line 8 under the action of gravity flows into the storage tank 10.
  • the heat exchanger is arranged below the level of the level 22, a conveying device operated with external energy is not absolutely necessary in the circulation line 12.
  • the gas discharge line 8 If the heat exchanger 15 is arranged below the height of the liquid level 23, the carbon dioxide condensed in the heat exchanger 15 must be conveyed into the storage tank 10 by means of a conveying device, not shown here.
  • the device 1 allows the filling of a mobile tank 6 with liquid carbon dioxide of a required and stored in the storage tank 2 quality.
  • carbon dioxide gas which is present before the start of the filling process in the mobile tank 6 and the quality is not guaranteed, either discharged into the ambient atmosphere or introduced into the storage tank 2, but the storage tank 10, from which it is for applications in which a high quality level of carbon dioxide is not required, can be removed.
  • the heat exchanger 15 takes place transfer of heat from the guided in the gas discharge line 8 gas in the circuit 12 guided carbon dioxide gas, the construction or maintenance of a certain predetermined operating pressure in the reservoir 2, which supports the feed pump 4 and in this way to save Energy contributes.

Abstract

Bei Verfahren und Vorrichtungen zum Befüllen eines mobilen Tanks mit flüssigem Kohlendioxid, bei dem flüssiges Kohlendioxid aus einem ortsfesten Vorratstank mittels einer Förderpumpe in einen mobilen Tank gefüllt und gleichzeitig gasförmiges Kohlendioxid aus dem mobilen Tank abgeführt wird, wird das aus dem mobilen Tank abgezogene Kohlendioxid häufig ungenutzt in die Umgebungsatmosphäre abgegeben. Um das abgezogene Kohlendioxidgas nutzbringend verwerten zu können und gleichzeitig eine Kontamination des im Vorratstank gespeicherten Kohlendioxids zu verhindern, wird erfindungsgemäß das aus dem mobilen Tank abgezogene Kohlendioxidgas an einem Wärmetauscher in thermischem Kontakt mit flüssigem Kohlendioxid aus dem Vorratstank gebracht. Dabei kondensiert das Kohlendioxidgas aus dem mobilen Tank zumindest teilweise aus und wird in einem Speichertank zur späteren Verwendung gesammelt. Das beim Wärmetausch verdampfte Kohlendioxid aus dem Vorratstank wird zwecks Druckaufbau in diesen zurückgeführt.In processes and apparatuses for filling a mobile tank with liquid carbon dioxide, in which liquid carbon dioxide from a stationary storage tank is filled into a mobile tank by means of a feed pump and at the same time gaseous carbon dioxide is removed from the mobile tank, the carbon dioxide withdrawn from the mobile tank is often unused released into the ambient atmosphere. In order to utilize the extracted carbon dioxide gas useful while preventing contamination of the stored carbon dioxide in the storage tank, according to the invention withdrawn from the mobile tank carbon dioxide gas is brought to a heat exchanger in thermal contact with liquid carbon dioxide from the storage tank. The carbon dioxide gas condenses from the mobile tank at least partially and is collected in a storage tank for later use. The evaporated during heat exchange carbon dioxide from the storage tank is returned for the purpose of pressure build-up in this.

Description

Die Erfindung betrifft ein Verfahren zum Befüllen eines mobilen Tanks mit flüssigem Kohlendioxid, bei dem flüssiges Kohlendioxid aus einem ortsfesten Vorratstank mittels einer Förderpumpe in einen mobilen Tank gefüllt und gleichzeitig gasförmiges Kohlendioxid aus dem mobilen Tank abgeführt wird. Die Erfindung betrifft des Weiteren eine entsprechende Vorrichtung.The invention relates to a method for filling a mobile tank with liquid carbon dioxide, is filled in the liquid carbon dioxide from a stationary storage tank by means of a feed pump in a mobile tank and simultaneously removed gaseous carbon dioxide from the mobile tank. The invention further relates to a corresponding device.

Mobile Tanks, beispielsweise Straßentankwagen oder Eisenbahnkesselwagen, werden in der Regel in Tanklagern aus ortsfest installierten Lagerbehältern befüllt, in denen das Kohlendioxid im flüssigen Zustand bei einem Druck von 15 bar bis 17 bar oder mehr bevorratet wird. Dabei wird noch im mobilen Tank befindliches Kohlendioxidgas durch das zugeführte flüssige Kohlendioxid verdrängt und aus dem Tank entfernt.Mobile tanks, such as road tankers or rail tank cars, are usually filled in tank farms from stationary installed storage containers, in which the carbon dioxide in the liquid state at a pressure of 15 bar to 17 bar or more is stored. In this case, carbon dioxide gas still in the mobile tank is displaced by the supplied liquid carbon dioxide and removed from the tank.

Eine aus dem Stand der Technik bekannte Station zum Befüllen von flüssigem Kohlendioxid aus einem Vorratstank in einen mobilen Tank wird in der WO 2005/075882 A1 beschrieben. Bei diesem System wird zunächst der zu betankende mobile Tank durch Zuführung von Kohlendioxidgas aus dem Vorratstank auf einen Druck gebracht, bei dem eine Verfestigung des zuzuführenden Kohlendioxids ausgeschlossen ist. Anschließend wird flüssiges Kohlendioxid aus dem Vorratstank in den mobilen Tank eingeleitet und gleichzeitig Kohlendioxidgas aus dem mobilen Tank abgezogen, wobei, beispielsweise mit Hilfe eines Ausgleichsgefäßes, darauf geachtet wird, dass die genannte Druckbedingung im mobilen Tank erhalten bleibt. Das abgezogene Kohlendioxidgas wird an einem Druckhalteventil in die Umgebungsatmosphäre abgeführt. Ein nicht unerheblicher Teil des Kohlendioxids geht auf diese Weise ungenutzt verloren.A known from the prior art station for filling liquid carbon dioxide from a storage tank in a mobile tank is in the WO 2005/075882 A1 described. In this system, the mobile tank to be refueled is first brought from the storage tank to a pressure by supplying carbon dioxide gas, at which a solidification of the supplied carbon dioxide is excluded. Subsequently, liquid carbon dioxide is introduced from the storage tank into the mobile tank and at the same time carbon dioxide gas is withdrawn from the mobile tank, care being taken, for example with the aid of a compensating vessel, that the said pressure condition in the mobile tank is maintained. The withdrawn carbon dioxide gas is removed at a pressure holding valve in the ambient atmosphere. A not insignificant part of the carbon dioxide is lost in this way unused.

Um das aus dem mobilen Tank abgezogene Kohlendioxidgas weiter nutzen zu können, wird es häufig verflüssigt und direkt oder indirekt erneut dem Lagertank zugeführt. Ein derartiges System wird in der US 4211085 A1 beschrieben. Bei diesem Gegenstand wird flüssiges Kohlendioxid aus einem Vorratstank einem Zwischenbehälter zugeführt, aus dem ein mobiler Tank unter der Wirkung des hydrostatischen Drucks im Zwischenbehälter befüllt wird. Bei der Befüllung aus dem mobilen Tank verdrängtes Kohlendioxidgas wird einem Kältetank zugeführt, in dem bei Tripelpunktbedingungen festes Kohlendioxid vorliegt. Das in den Kältetank eingeleitete Kohlendioxidgas kondensiert dort und vermischt sich mit dem Kohlendioxidschnee zu Kohlendioxidschlamm. Um den Druck im Kältetank konstant zu halten, wird im Kältetank entstehendes Kohlendioxidgas mittels eines Kompressors rückverflüssigt und dem Vorratstank zugeführt.In order to continue to use the deducted from the mobile tank carbon dioxide gas, it is often liquefied and fed directly or indirectly again to the storage tank. Such a system is used in the US 4211085 A1 described. In this article, liquid carbon dioxide is supplied from a storage tank to an intermediate container from which a mobile tank under the action of the hydrostatic pressure in the intermediate container is filled. When filling from the mobile tank displaced carbon dioxide gas is fed to a cold tank in which there is solid carbon dioxide at triple point conditions. The introduced into the cold tank carbon dioxide gas condenses there and mixes with the carbon dioxide snow to carbon dioxide sludge. In order to keep the pressure in the cold tank constant, carbon dioxide gas formed in the cold tank is reliquefied by means of a compressor and fed to the storage tank.

Die Qualität des aus dem mobilen Tank abgezogenen Kohlendioxidgases ist jedoch nicht immer genau bekannt; insbesondere dann, wenn an das Kohlendioxid besondere Qualitätsanforderungen gestellt werden, wie beispielsweise Lebensmittelqualität, darf das aus dem mobilen Tank abgezogene Gas nicht in den Vorratstank rückgeführt werden, um der Gefahr einer Kontamination des im Vorratstank gelagerten Kohlendioxids zu entgehen.However, the quality of the carbon dioxide gas withdrawn from the mobile tank is not always accurately known; In particular, when the carbon dioxide special quality requirements are made, such as food quality, the withdrawn from the mobile tank gas must not be returned to the storage tank to avoid the risk of contamination of stored in the storage tank carbon dioxide.

Die WO 02/081963 A1 beschreibt eine Vorrichtung zum Betanken eines Kundentanks aus einem mobilen Versorgungstank, bei der verhindert wird, dass das bei der Befüllung aus dem Kundentank abgezogene Kohlendioxidgas in die Umgebungsatmosphäre abgezogen wird. Bei diesem Gegenstand wird flüssiges Kohlendioxid aus dem mobilen Versorgungstank mittels einer Pumpe in den Kundentank gepumpt und gleichzeitig Kohlendioxidgas aus dem Kundentank abgezogen. Das auf einem Druck oberhalb des Tripelpunkts von Kohlendioxid befindliche abgezogene Kohlendioxidgas wird an einem Wärmetauscher, der innerhalb des Versorgungstanks angeordnet ist, in Wärmekontakt mit dem flüssigen Kohlendioxid im Versorgungstank gebracht, verflüssigt und an einem stromab zur Pumpe angeordneten Injektor in das dem Kundentank zugeführte flüssige Kohlendioxid eingespeist. Dadurch kann ein Teil des Kohlendioxidgases erneut verwendet werden, ohne dass es zu einer Kontamination des im mobilen Tank befindlichen Kohlendioxids kommen kann.The WO 02/081963 A1 describes a device for refueling a customer's tank from a mobile supply tank in which it is prevented that the withdrawn during filling from the customer tank carbon dioxide gas is withdrawn into the ambient atmosphere. In this article, liquid carbon dioxide is pumped from the mobile supply tank by means of a pump in the customer tank and simultaneously withdrawn carbon dioxide gas from the customer tank. The carbon dioxide gas withdrawn at a pressure above the triple point of carbon dioxide is liquefied at a heat exchanger located within the supply tank in thermal contact with the liquid carbon dioxide in the supply tank and liquefied at an injector downstream of the pump into the liquid carbon dioxide supplied to the customer tank fed. As a result, part of the carbon dioxide gas can be reused without contamination of the carbon dioxide in the mobile tank.

Eine derartige Verfahrensführung ist jedoch bei der Befüllung von mobilen Tanks, die zur Befüllung von weiteren Tanks (Kundentanks) dienen, nicht immer erwünscht. Insbesondere bei hohen Qualitätsanforderungen an das Kohlendioxid würde eine im mobilen Tank etwaig vorhandene Kontamination bei der Befüllung im mobilen Tank verbleiben und zur Beeinträchtigung der Qualität des gelieferten Gases führen.However, such a procedure is not always desirable in the filling of mobile tanks, which serve to fill additional tanks (customer tanks). In particular, with high quality requirements for the carbon dioxide would be in the mobile tank any existing contamination during filling remain in the mobile tank and lead to impairment of the quality of the delivered gas.

Aufgabe der vorliegenden Erfindung ist somit, eine Möglichkeit zur Betankung von mobilen, zur Betankung von Kundentanks dienenden Tanks mit flüssigem Kohlendioxid zu schaffen, bei der die Verluste an Kohlendioxidgas möglichst gering gehalten werden und zudem die Gefahr der Kontamination des im Vorratstank oder in den zu befüllenden Kundentanks vorliegenden Kohlendioxids minimiert ist.Object of the present invention is thus to provide a way to refuel mobile tanks for refueling of customer tanks with liquid carbon dioxide, in which the losses of carbon dioxide gas are minimized and also the risk of contamination in the storage tank or in the to be filled Customer tanks present carbon dioxide is minimized.

Gelöst ist diese Aufgabe durch ein Verfahren mit den Merkmalen des Patentanspruchs 1 sowie durch eine Vorrichtung mit den Merkmalen des Anspruchs 5. Vorteilhafte Ausgestaltungen der Erfindung werden in den Unteransprüchen angegeben.This object is achieved by a method having the features of patent claim 1 and by an apparatus having the features of claim 5. Advantageous embodiments of the invention are specified in the subclaims.

Das erfindungsgemäße Verfahren ist also dadurch gekennzeichnet, dass das aus dem mobilen Tank abgezogene gasförmige Kohlendioxid an einem Wärmetauscher in Wärmekontakt mit flüssigem Kohlendioxid aus dem Vorratstank gebracht wird, wobei das gasförmige Kohlendioxid aus dem mobilen Tank zumindest teilweise verflüssigt und anschließend einem Speichertank zugeführt wird, in dem ein höherer Druck als im Vorratstank herrscht, und wobei das flüssige Kohlendioxid aus dem Vorratstank zumindest teilweise verdampft, anschließend in den Vorratstank zurückgeführt und zum Druckaufbau im Vorratstank eingesetzt wird.The inventive method is thus characterized in that the withdrawn from the mobile tank gaseous carbon dioxide is brought to a heat exchanger in thermal contact with liquid carbon dioxide from the storage tank, the gaseous carbon dioxide from the mobile tank is at least partially liquefied and then fed to a storage tank, in which is a higher pressure than in the storage tank, and wherein the liquid carbon dioxide from the storage tank at least partially evaporated, then returned to the storage tank and is used to build up pressure in the storage tank.

Das aus dem mobilen Tank abgezogene Kohlendioxidgas sollte dabei einen Druck aufweisen, der zumindest dem Tripelpunktdruck von Kohlendioxid entspricht. Gegebenenfalls kann optional eine weitere Förderpumpe zum Einsatz kommen, um das aus dem mobilen Tank abgezogene Kohlendioxidgas auf einen Wert oberhalb des Tripelpunktdrucks zu verdichten. Beispielsweise aufgrund der Druckerhöhung durch die Förderpumpe liegt das im Vorratstank bevorratete Kohlendioxid bei einer niedrigeren Temperatur und geringerem Druck als das Kohlendioxid im mobilen Tank vor. Demzufolge wird beim Wärmetausch Wärme vom aus dem mobilen Tank abgezogenen Kohlendioxidgas auf das flüssige Kohlendioxid aus dem Vorratstank übertragen.The withdrawn from the mobile tank carbon dioxide gas should have a pressure which corresponds at least to the triple point pressure of carbon dioxide. Optionally, a further feed pump can optionally be used in order to compress the carbon dioxide gas withdrawn from the mobile tank to a value above the triple point pressure. For example, due to the pressure increase by the feed pump stored in the storage tank carbon dioxide is at a lower temperature and lower pressure than the carbon dioxide in the mobile tank. As a result, heat is transferred from the carbon dioxide gas withdrawn from the mobile tank to the liquid carbon dioxide from the storage tank during the heat exchange.

Die laufende Verdampfung von flüssigem Kohlendioxid aus dem Vorratstank beim Wärmetausch mit dem Kohlendioxidgas aus dem mobilen Tank führt während des Füllvorgangs zu einer Stabilisierung des Drucks im Vorratstank und damit zu einer Entlastung der Förderpumpe.The ongoing evaporation of liquid carbon dioxide from the storage tank during heat exchange with the carbon dioxide gas from the mobile tank leads during the filling process to stabilize the pressure in the storage tank and thus to a discharge of the feed pump.

Bevorzugt wird das flüssige Kohlendioxid im Vorratstank bei einem Druck von mindestens 15 bar, bevorzugt mindestens 18 bar gelagert. Das Kohlendioxid besitzt dabei eine Temperatur zwischen -15°C und -20°C. Um die Verflüssigung des aus dem mobilen Tank abgezogenen Kohlendioxids zu ermöglichen, ist der Druck im Speichertank höher, bevorzugt zwischen 1 bar und 2 bar höher als im Vorratstank.The liquid carbon dioxide is preferably stored in the storage tank at a pressure of at least 15 bar, preferably at least 18 bar. The carbon dioxide has a temperature between -15 ° C and -20 ° C. In order to facilitate the liquefaction of the withdrawn from the mobile tank carbon dioxide, the pressure in the storage tank is higher, preferably between 1 bar and 2 bar higher than in the storage tank.

Zweckmäßigerweise wird während des Füllvorgangs das im Vorratstank vorliegende Kohlendioxidgas zumindest teilweise verflüssigt und als flüssiges Kohlendioxid in den Vorratstank zurückgeführt. Dieser Vorgang kann im Verlauf der Befüllung des mobilen Tanks bei Bedarf, kontinuierlich oder in regelmäßigen Abständen, erfolgen.Appropriately, the present in the storage tank carbon dioxide gas is at least partially liquefied and returned as liquid carbon dioxide in the storage tank during the filling process. This process can take place during the filling of the mobile tank if necessary, continuously or at regular intervals.

Die Aufgabe der Erfindung wird auch mit einer Vorrichtung mit den Merkmalen des Anspruchs 5 gelöst.The object of the invention is also achieved with a device having the features of claim 5.

Eine erfindungsgemäße Vorrichtung zum Befüllen eines mobilen Tanks mit flüssigem Kohlendioxid umfasst einen thermisch isolierten, ortsfesten Vorratstank zum Speichern von flüssigem Kohlendioxid, eine mit einem mobilen Tank verbindbare Füllleitung zum Fördern von flüssigem Kohlendioxid aus dem Vorratstank in den mobilen Tank, eine in der Füllleitung angeordnete Förderpumpe und eine mit dem mobilen Tank verbindbare Gasabzugsleitung zum Abführen von Kohlendioxidgas aus dem mobilen Tank und ist erfindungsgemäß dadurch gekennzeichnet, dass die Gasabzugsleitung in einen thermisch isolierten Speichertank für flüssiges Kohlendioxid ausmündet, wobei in der Gasabzugsleitung ein Wärmetauscher angeordnet ist, der eine thermische Verbindung zwischen dem Kohlendioxidgas in der Gasabzugsleitung und einer flüssigen Phase des im Vorratstank bevorrateten Kohlendioxids herstellt.A device according to the invention for filling a mobile tank with liquid carbon dioxide comprises a thermally insulated, stationary storage tank for storing liquid carbon dioxide, a filling line connectable to a mobile tank for conveying liquid carbon dioxide from the storage tank into the mobile tank, a feed pump arranged in the filling line and a gas exhaust duct connectable to the mobile tank for exhausting carbon dioxide gas from the mobile tank and being characterized in that the gas exhaust duct discharges into a thermally insulated liquid carbon dioxide storage tank, wherein in the gas exhaust duct a heat exchanger is arranged to provide thermal communication between the tank Produces carbon dioxide gas in the gas discharge line and a liquid phase of stored in the storage tank carbon dioxide.

Beim Vorratstank handelt es sich in der Regel um einen ortsfest in einem Tanklager oder im Bereich einer Kohlendioxid-Erzeugungsanlage installierten Tank, aus dem gleichzeitig oder in zeitlicher Abfolge mehrere mobile Tanks befüllt werden können. Beispielsweise handelt es beim Vorratstank um einen Niederdruck-Tank mit einem Fassungsvermögen zwischen 100 t und 1000 t, in dem flüssiges Kohlendioxid bei einem Druck zwischen 15 und 20 bar und einer Temperatur zwischen minus 20°C und minus 35°C bevorratet wird. Bei dem mobilen Tank handelt es sich insbesondere um einen Tank, der dazu bestimmt ist, Tankanlagen oder einzelne Behälter, die bei räumlich entfernten Verbrauchern fest installiert sind, zu befüllen. Beispielsweise handelt es sich beim mobilen Tank um einen Straßentankwagen oder um einen Eisenbahnkesselwagen. Beim Wärmetauscher handelt es sich um einen indirekten Wärmetauscher, in dem an einer Wärmetauscherfläche Wärme vom Kohlendioxidgas aus dem mobilen Tank auf flüssiges Kohlendioxid aus dem Vorratstank übertragen wird. In der Gasabzugsleitung bzw. im Speichertank liegt das Kohlendioxid auf einem höheren Druck als im Vorratstank vor. Durch die Abgabe der Wärme an der Wärmetauscherfläche kondensiert das Kohlendioxidgas in der Gasabzugsleitung zumindest teilweise und wird anschließend im Speichertank aufgefangen. Gleichzeitig verdampft flüssiges Kohlendioxid aus dem Vorratstank und wird erfindungsgemäß dazu eingesetzt, zur Aufrechterhaltung eines vorgegebenen minimalen Betriebsdrucks im Vorratstank von beispielsweise 15 bar bis 18 bar beizutragen.The storage tank is usually a stationary in a tank farm or installed in the area of a carbon dioxide generating tank, from the several mobile tanks can be filled simultaneously or in chronological order. For example, the storage tank is a low-pressure tank with a capacity between 100 t and 1000 t, is stored in the liquid carbon dioxide at a pressure between 15 and 20 bar and a temperature between minus 20 ° C and minus 35 ° C. In particular, the mobile tank is a tank designed to fill tanks or individual containers permanently installed in remote consumers. For example, the mobile tank is a road tanker or a railroad tank car. The heat exchanger is an indirect heat exchanger in which heat is transferred from the mobile tank to liquid carbon dioxide from the storage tank at a heat exchanger surface heat from the carbon dioxide gas. In the gas discharge line or in the storage tank, the carbon dioxide is present at a higher pressure than in the storage tank. By the discharge of the heat at the heat exchanger surface, the carbon dioxide gas condenses in the gas discharge line at least partially and is then collected in the storage tank. At the same time liquid carbon dioxide evaporates from the storage tank and according to the invention is used to contribute to maintaining a predetermined minimum operating pressure in the storage tank, for example 15 bar to 18 bar.

Bevorzugt ist der Wärmetauscher in einer an den Vorratstank angeschlossenen Kreislaufleitung angeordnet. Die Kreislaufleitung fördert flüssiges Kohlendioxid zum Wärmetauscher, in dem das flüssige Kohlendioxid aufgrund des Wärmekontakts mit dem wärmeren Kohlendioxidgas in der Gasabzugsleitung zumindest teilweise verdampft. Das zumindest teilweise verdampfte Kohlendioxid wird anschließend in den Kopfraum des Vorratstanks zurückgeführt, wo es eine gasförmige Phase ausbildet.The heat exchanger is preferably arranged in a circulation line connected to the storage tank. The circulation line conveys liquid carbon dioxide to the heat exchanger, in which the liquid carbon dioxide at least partially evaporates due to the thermal contact with the warmer carbon dioxide gas in the gas discharge line. The at least partially vaporized carbon dioxide is then returned to the headspace of the storage tank where it forms a gaseous phase.

Sofern der Wärmetauscher oberhalb der Höhe eines im Vorratstank vorliegenden Flüssigkeitspegels des verflüssigten Kohlendioxids vorliegt, bedarf es in der Kreislaufleitung, stromauf zum Wärmetauscher, einer Förderpumpe, um flüssiges Kohlendioxid zum Wärmetauscher zu pumpen. Ist der Wärmetauscher jedoch unterhalb der Höhe des Flüssigkeitspegels angeordnet, fließt das flüssige Kohlendioxid unter der Wirkung der Schwerkraft zum Wärmetauscher, und eine Förderpumpe ist in der Kreislaufleitung entbehrlich.If the heat exchanger is present above the level of a liquid level of the liquefied carbon dioxide present in the storage tank, a feed pump is required in the circulation line, upstream of the heat exchanger, to pump liquid carbon dioxide to the heat exchanger. However, if the heat exchanger is arranged below the level of the liquid level, the liquid flows Carbon dioxide under the action of gravity to the heat exchanger, and a feed pump is dispensable in the circulation line.

Ähnliches gilt für die Anordnung des Wärmetauschers in der Gasabzugsleitung gegenüber dem Speichertank. Ist der Wärmetauscher oberhalb der Höhe eines im Speichertank vorliegenden Flüssigkeitspegels an verflüssigtem Kohlendioxid angeordnet, kann das im Wärmetauscher verflüssigte Kohlendioxid unter der Wirkung der Schwerkraft in den Speichertank einfließen. Ist dagegen der Wärmetauscher unterhalb der Höhe eines Flüssigkeitspegels im Speichertank angeordnet, muss das im Wärmetauscher kondensierte Kohlendioxid mittels einer in der Gasabzugsleitung, stromab zum Wärmetauscher angeordneten Förderpumpe dem Speichertank zugeführt werden.The same applies to the arrangement of the heat exchanger in the gas discharge line relative to the storage tank. If the heat exchanger is arranged above the level of a liquid level of liquefied carbon dioxide present in the storage tank, the carbon dioxide liquefied in the heat exchanger can flow into the storage tank under the effect of gravity. If, on the other hand, the heat exchanger is arranged below the level of a liquid level in the storage tank, the carbon dioxide condensed in the heat exchanger must be supplied to the storage tank by means of a feed pump arranged downstream of the heat exchanger in the gas discharge line.

Eine andere Ausführungsform der Erfindung sieht vor, dass der Wärmetauscher innerhalb einer flüssigen Phase des im Vorratstank bevorrateten Kohlendioxids angeordnet ist. In diesem Fall, der jedoch mit einigem baulichem Aufwand verknüpft ist, erübrigt sich eine Förderung des flüssigen Kohlendioxids zum Wärmetauscher mittels einer Fördereinrichtung. Beispielsweise wird die Gasabzugsleitung in einer Rohrschlange durch das Innere des Vorratsbehälters geführt, wobei die Wände der Rohrschlange in thermischen Kontakt mit der flüssigen Phase des Kohlendioxids im Vorratsbehälter stehen und auf diese Weise als Wärmetauscherfläche wirken.Another embodiment of the invention provides that the heat exchanger is arranged within a liquid phase of the stored carbon dioxide in the storage tank. In this case, which is however associated with some construction effort, a promotion of the liquid carbon dioxide to the heat exchanger by means of a conveyor is unnecessary. For example, the gas discharge line is guided in a coil through the interior of the reservoir, wherein the walls of the coil are in thermal contact with the liquid phase of the carbon dioxide in the reservoir and act in this way as a heat exchanger surface.

Das erfindungsgemäße Verfahren sowie die erfindungsgemäße Vorrichtung zeichnen sich insbesondere dadurch aus, dass beim Befüllen des mobilen Tanks weder Kohlendioxidgas in die Umgebungsatmosphäre abgegeben wird noch Kohlendioxid mit unerwünschten Beimengungen (kontaminiertes Kohlendioxid) im Vorratsbehälter und/oder dem mobilen Tank angereichert wird. Das erfindungsgemäße Verfahren eignet sich somit insbesondere zum Befüllen von mobilen Tanks mit flüssigem Kohlendioxid einer besonderen Qualitätsstufe, beispielsweise von Kohlendioxid in Lebensmittelqualität, zur Weitergabe an Kundentanks.The inventive method and the device according to the invention are characterized in particular by the fact that when filling the mobile tank neither carbon dioxide gas is released into the ambient atmosphere nor carbon dioxide with undesirable admixtures (contaminated carbon dioxide) in the reservoir and / or the mobile tank is enriched. The inventive method is thus particularly suitable for filling mobile tanks with liquid carbon dioxide of a particular quality level, for example of food-grade carbon dioxide, for transfer to customer tanks.

Anhand der Zeichnung soll ein Ausführungsbeispiel der Erfindung näher erläutert werden. Die einzige Zeichnung (Fig. 1) zeigt schematisch eine erfindungsgemäße Vorrichtung zum Befüllen eines mobilen Tanks mit flüssigem Kohlendioxid.Reference to the drawings, an embodiment of the invention will be explained in more detail. The only drawing ( Fig. 1 ) schematically shows a device according to the invention for filling a mobile tank with liquid carbon dioxide.

Die in Fig. 1 gezeigte Vorrichtung 1 umfasst einen thermisch gut isolierten und druckfest ausgestalteten Vorratstank 2, im Ausführungsbeispiel einen Niederdruck-Tank, in dem flüssiges Kohlendioxid bei einem Druck zwischen 15 und 20 bar und einer Temperatur zwischen minus 20°C und minus 35°C bevorratet wird. Der Vorratstank 2 ist beispielsweise Teil eines mehrere fest installierte Vorratstanks aufweisenden Tanklagers. Im Ausführungsbeispiel dient der Vorratstank 2 zum Lagern von flüssigem Kohlendioxid, das besonderen Qualitätsanforderungen genügen muss, beispielsweise Lebensmittelqualität. Aus dem Bodenbereich des Vorratstanks 2 geht eine thermisch isolierte und druckfeste Füllleitung 3 ab, in der eine Förderpumpe 4 installiert ist. Die Füllleitung 3 mündet in einen Füllanschluss 5, der mit einem mobilen Tank 6, im Ausführungsbeispiel einem Straßentankwagen, verbindbar ist. Der mobile Tank 6, in dem das Kohlendioxid im flüssigen Zustand transportiert wird, dient zur Versorgung von (hier nicht gezeigten) Kundentanks mit flüssigem Kohlendioxid.In the Fig. 1 shown device 1 comprises a thermally well insulated and pressure-resistant configured storage tank 2, in the embodiment, a low-pressure tank in which liquid carbon dioxide at a pressure between 15 and 20 bar and a temperature between minus 20 ° C and minus 35 ° C is stored. The storage tank 2 is for example part of a plurality of permanently installed storage tanks having tank farm. In the exemplary embodiment, the storage tank 2 is used for storing liquid carbon dioxide, which must meet special quality requirements, such as food quality. From the bottom area of the storage tank 2 is a thermally insulated and pressure-resistant filling line 3, in which a feed pump 4 is installed. The filling line 3 opens into a filling connection 5 which can be connected to a mobile tank 6, in the exemplary embodiment a road tanker. The mobile tank 6, in which the carbon dioxide is transported in the liquid state, serves to supply (not shown here) customer tanks with liquid carbon dioxide.

Die Vorrichtung 1 umfasst des Weiteren eine Gasabzugsleitung 8, die an einem in einem oberen Bereich des mobilen Tanks 6 angeordneten Gasabzugsanschluss 9 mit dem mobilen Tank 6 verbindbar ist. An ihrem vom Gasabzugsanschluss 9 entgegengesetzten Ende mündet die Gasabzugsleitung 8 zur Wiedergewinnung von gasförmigem Kohlendioxid aus dem mobilen Tank 6 in einen Speichertank 10 ein.The device 1 further comprises a gas discharge line 8, which is connectable to the mobile tank 6 at a gas discharge connection 9 arranged in an upper area of the mobile tank 6. At its opposite end from the gas outlet connection 9, the gas discharge line 8 opens into a storage tank 10 for the recovery of gaseous carbon dioxide from the mobile tank 6.

Die Vorrichtung 1 umfasst weiterhin eine Kohlendioxid-Kreislaufleitung 12, die aus einem unteren Bereich des Vorratstanks 2 aus- und in einen oberen Bereich des Vorratstanks 2 einmündet. Eine Förderpumpe 13 dient zum Fördern von flüssigem Kohlendioxid in der Kreislaufleitung 12. Die Kreislaufleitung 12 sowie die Gasabzugsleitung 8 durchlaufen einen Wärmetauscher 15, der eine Wärmetauscherfläche besitzt, an der das durch die Kreislaufleitung 12 und die Gasabzugsleitung 8 geführte Kohlendioxid in indirekten Wärmekontakt gebracht werden können.The device 1 further comprises a carbon dioxide circulation line 12, which opens out of a lower region of the storage tank 2 and opens into an upper region of the storage tank 2. A feed pump 13 serves to convey liquid carbon dioxide in the circulation line 12. The circulation line 12 and the gas discharge line 8 pass through a heat exchanger 15 which has a heat exchanger surface, at which the guided through the circulation line 12 and the gas discharge line 8 carbon dioxide can be brought into indirect thermal contact ,

Der Druck im Speichertank 10 ist höher als der Druck im Vorratstank 2. Ebenso ist innerhalb des Wärmetauschers 15 der Druck in dem Leitungsabschnitt der Kreislaufleitung 12 geringer als der Druck in dem Leitungsabschnitt der Gasabzugsleitung 8.The pressure in the storage tank 10 is higher than the pressure in the storage tank 2. Also, within the heat exchanger 15, the pressure in the pipe portion of the circulation pipe 12 is lower than the pressure in the pipe portion of the gas discharge pipe 8.

Im Betrieb der Vorrichtung 1 wird zunächst ein zu befüllender mobiler Tank 6 am Füllanschluss 5 und dem Gasabzugsanschluss 9 an die Vorrichtung 1 angeschlossen. Im mobilen Tank 6 herrschen während des Betankungsvorgangs Druck- und Temperaturbedingungen oberhalb des Tripelpunktes von Kohlendioxid. Nach dem Anschluss des mobilen Tanks 6 wird flüssiges Kohlendioxid aus dem Vorratstank 2, mittels der Förderpumpe 4 in den mobilen Tank 6 gefördert. Das in den mobilen Tank 6 eingeleitete flüssige Kohlendioxid sammelt sich in einer flüssigen Phase 17 und verdrängt zugleich gasförmiges Kohlendioxid aus einer im mobilen Tank 6 vorliegenden Gasphase 18. Das verdrängte gasförmige Kohlendioxid strömt durch die Gasabzugsleitung 8 zum Wärmetauscher 15, in dem es in thermischen Kontakt mit dem im Kreislauf 12 geführten flüssigen Kohlendioxid gebracht wird. Dabei kühlt es ab und wird - da sein Druck höher als der des in der Kreislaufleitung 12 geführten Kohlendioxids ist - zumindest teilweise verflüssigt. Das auf diese Weise verflüssigte Kohlendioxidgas läuft unter der Wirkung der Schwerkraft oder unter Zuhilfenahme einer hier nicht gezeigten Förderpumpe in den Speichertank 10. Das auf diese Weise im Speichertank 10 gesammelte flüssige Kohlendioxid kann anschließend über hier nicht gezeigte Entnahmeleitungen für weitere Anwendungen entnommen werden.During operation of the device 1, a mobile tank 6 to be filled is first connected to the filling connection 5 and the gas discharge connection 9 to the device 1. In the mobile tank 6 prevail during the refueling operation pressure and temperature conditions above the triple point of carbon dioxide. After connecting the mobile tank 6 liquid carbon dioxide from the storage tank 2 is conveyed by means of the feed pump 4 in the mobile tank 6. The liquid carbon dioxide introduced into the mobile tank 6 collects in a liquid phase 17 and at the same time displaces gaseous carbon dioxide from a gas phase 18 present in the mobile tank 6. The displaced gaseous carbon dioxide flows through the gas discharge line 8 to the heat exchanger 15, in which it makes thermal contact is brought with the guided in the circuit 12 liquid carbon dioxide. It cools and is - since its pressure is higher than that of the guided in the circulation line 12 carbon dioxide - at least partially liquefied. The carbon dioxide gas liquefied in this way runs under the action of gravity or with the aid of a feed pump not shown here in the storage tank 10. The collected in this way in the storage tank 10 liquid carbon dioxide can then be removed via not shown here sampling lines for other applications.

Gleichzeitig wird flüssiges Kohlendioxid aus der im Vorratstank 2 vorliegenden flüssigen Phase 19 mittels der Förderpumpe 13 zum Wärmetauscher 15 geführt, verdampft beim thermischen Kontakt mit dem gasförmigen Kohlendioxid in der Gasabzugsleitung 8 zumindest teilweise und gelangt in eine im Vorratstank 2 vorliegende Gasphase 20. Auf diese Weise trägt das im Wärmetauscher 15 verdampfte Kohlendioxidgas zum Aufbau oder zur Aufrechterhaltung des Betriebsdrucks im Vorratstank 2 bei, während gleichzeitig laufend flüssiges Kohlendioxid aus der flüssigen Phase 19 entnommen wird. Über eine hier nicht näher erläuterte Einrichtung 21 zur Rückverflüssigung kann zudem kontinuierlich oder in vorgegebenen zeitlichen Abständen Kohlendioxid aus der Gasphase 20 entnommen, verflüssigt und anschließend der flüssigen Phase 19 im Vorratstank 2 zugeführt werden.At the same time liquid carbon dioxide from the present in the storage tank 2 liquid phase 19 is guided by means of the pump 13 to the heat exchanger 15, evaporates at the thermal contact with the gaseous carbon dioxide in the gas discharge line 8 at least partially and enters a present in the storage tank 2 gas phase 20. In this way contributes the carbon dioxide gas vaporized in the heat exchanger 15 to build or maintain the operating pressure in the storage tank 2, while at the same time continuously liquid carbon dioxide from the liquid phase 19 is removed. In addition, carbon dioxide can be removed from the gas phase 20, liquefied and then fed to the liquid phase 19 in the storage tank 2 via a device 21 for re-liquefaction, which is not described here in more detail.

Im Ausführungsbeispiel nach Fig. 1 liegt der Wärmetauscher 15 oberhalb der Höhe eines Pegels 22 einer im Vorratstank 2 vorliegenden flüssigen Phase 19 und oberhalb der Höhe eines Pegels 23 einer im Speichertank 10 vorliegenden flüssigen Phase 24. Bei dieser Anordnung bedarf es der Pumpe 13, um flüssiges Kohlendioxid zum Wärmetauscher 15 zu fördern, während gleichzeitig das im Wärmetauscher 15 kondensierte Kohlendioxid in der Gasabzugsleitung 8 unter der Wirkung der Schwerkraft in den Speichertank 10 abfließt. Wird dagegen der Wärmetauscher unterhalb der Höhe des Pegels 22 angeordnet, ist eine mit Fremdenergie betriebene Fördereinrichtung in der Kreislaufleitung 12 nicht zwingend erforderlich. Ähnliches gilt für die Gasabzugsleitung 8: Wird der Wärmetauscher 15 unterhalb der Höhe des Flüssigkeitspegels 23 angeordnet, muss das im Wärmetauscher 15 kondensierte Kohlendioxid mittels einer hier nicht gezeigten Fördereinrichtung in den Speichertank 10 hinein gefördert werden.In the embodiment according to Fig. 1 the heat exchanger 15 is above the level of a level 22 of a present in the storage tank 2 liquid phase 19 and above the level of a level 23 of a liquid phase 24 present in the storage tank 10. In this arrangement, the pump 13 is required to deliver liquid carbon dioxide to the heat exchanger 15, while at the same time the condensed in the heat exchanger 15 carbon dioxide in the gas discharge line 8 under the action of gravity flows into the storage tank 10. If, on the other hand, the heat exchanger is arranged below the level of the level 22, a conveying device operated with external energy is not absolutely necessary in the circulation line 12. The same applies to the gas discharge line 8: If the heat exchanger 15 is arranged below the height of the liquid level 23, the carbon dioxide condensed in the heat exchanger 15 must be conveyed into the storage tank 10 by means of a conveying device, not shown here.

Die erfindungsgemäße Vorrichtung 1 ermöglicht die Befüllung eines mobilen Tanks 6 mit flüssigem Kohlendioxid einer geforderten und im Vorratstank 2 gelagerten Qualität. Dabei wird Kohlendioxidgas, das vor Beginn des Befüllvorgangs im mobilen Tank 6 vorliegt und dessen Qualität nicht gesichert ist, weder in die Umgebungsatmosphäre abgegeben noch in den Vorratstank 2 eingeleitet, sondern dem Speichertank 10 zugeführt, aus dem es für Anwendungen, bei denen eine hohe Qualitätsstufe des Kohlendioxids nicht gefordert wird, entnommen werden kann. Zugleich unterstützt die im Wärmetauscher 15 erfolgende Übertragung von Wärme von dem in der Gasabzugsleitung 8 geführten Gas auf das im Kreislauf 12 geführte Kohlendioxidgas den Aufbau oder die Aufrechterhaltung eines bestimmten vorgegebenen Betriebsdrucks im Vorratsbehälter 2, der die Förderpumpe 4 unterstützt und auf diese Weise zur Einsparung von Energie beiträgt.The device 1 according to the invention allows the filling of a mobile tank 6 with liquid carbon dioxide of a required and stored in the storage tank 2 quality. In this case, carbon dioxide gas, which is present before the start of the filling process in the mobile tank 6 and the quality is not guaranteed, either discharged into the ambient atmosphere or introduced into the storage tank 2, but the storage tank 10, from which it is for applications in which a high quality level of carbon dioxide is not required, can be removed. At the same time takes place in the heat exchanger 15 taking place transfer of heat from the guided in the gas discharge line 8 gas in the circuit 12 guided carbon dioxide gas, the construction or maintenance of a certain predetermined operating pressure in the reservoir 2, which supports the feed pump 4 and in this way to save Energy contributes.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

1.1.
Vorrichtungcontraption
2.Second
Vorratstankstorage tank
3.Third
Füllleitungfilling line
4.4th
Förderpumpefeed pump
5.5th
FüllanschlussFilling connector
6.6th
Mobiler TankMobile tank
7.7th
--
8.8th.
GasabzugsleitungGas vent line
9.9th
GasabzugsanschlussGas outlet port
10.10th
Speichertankstorage tank
11.11th
--
12.12th
KreislaufleitungCircuit line
13.13th
Pumpepump
14.14th
--
15.15th
Wärmetauscherheat exchangers
16.16th
--
17.17th
Flüssige PhaseLiquid phase
18.18th
Gasphasegas phase
19.19th
Flüssige PhaseLiquid phase
20.20th
Gasphasegas phase
21.21st
Einrichtung zur RückverflüssigungDevice for re-liquefaction
22.22nd
Pegellevel
23.23rd
Pegellevel
24.24th
Flüssige PhaseLiquid phase

Claims (9)

Verfahren zum Befüllen eines mobilen Tanks mit flüssigem Kohlendioxid, bei dem flüssiges Kohlendioxid aus einem ortsfesten Vorratstank (2) mittels einer Förderpumpe (4) in einen mobilen Tank (6) gefüllt und gleichzeitig gasförmiges Kohlendioxid aus dem mobilen Tank (6) abgeführt wird,
dadurch gekennzeichnet,
dass das aus dem mobilen Tank (6) abgezogene gasförmige Kohlendioxid an einem Wärmetauscher (15) in Wärmekontakt mit flüssigem Kohlendioxid aus dem Vorratstank (2) gebracht wird, wobei das gasförmige Kohlendioxid aus dem mobilen Tank (6) zumindest teilweise verflüssigt und anschließend einem Speichertank (10) zugeführt wird, in dem ein höherer Druck als im Vorratstank (2) herrscht, und das flüssige Kohlendioxid aus dem Vorratstank (2) zumindest teilweise verdampft, anschließend in den Vorratstank (2) zurückgeführt und zum Druckaufbau im Vorratstank (2) eingesetzt wird.A method for filling a mobile tank with liquid carbon dioxide, in which liquid carbon dioxide from a stationary storage tank (2) by means of a feed pump (4) filled in a mobile tank (6) and at the same time gaseous carbon dioxide is removed from the mobile tank (6),
characterized,
that withdrawn from the mobile tank (6) gaseous carbon dioxide is brought to a heat exchanger (15) in thermal contact with liquid carbon dioxide from the storage tank (2), wherein the gaseous carbon dioxide from the mobile tank (6) at least partially liquefied, and then a storage tank (10) is supplied, in which a higher pressure than in the storage tank (2) prevails, and the liquid carbon dioxide from the storage tank (2) at least partially evaporated, then returned to the storage tank (2) and used to build up pressure in the storage tank (2) becomes. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das flüssige Kohlendioxid im Vorratstank (2) einen Druck von mindestens 15 bar, bevorzugt mindestens 18 bar aufweist.A method according to claim 1, characterized in that the liquid carbon dioxide in the storage tank (2) has a pressure of at least 15 bar, preferably at least 18 bar. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Druck im Speichertank (10) um 1 bis 2 bar höher als im Vorratstank (2) ist.Method according to one of claims 1 or 2, characterized in that the pressure in the storage tank (10) by 1 to 2 bar higher than in the storage tank (2). Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass während des Füllvorgangs das in einem Kopfraum des Vorratstanks (2) vorliegende Kohlendioxidgas zumindest teilweise verflüssigt und als flüssiges Kohlendioxid in den Vorratstank (2) zurückgeführt wird.Method according to one of the preceding claims, characterized in that during the filling process in a headspace of the storage tank (2) present carbon dioxide gas is at least partially liquefied and recycled as liquid carbon dioxide in the storage tank (2). Vorrichtung zum Befüllen eines mobilen Tanks mit flüssigem Kohlendioxid, mit einem thermisch isolierten, ortsfesten Vorratstank (2) zum Speichern von flüssigem Kohlendioxid, einer mit einem mobilen Tank (6) verbindbaren Füllleitung (3) zum Fördern von flüssigem Kohlendioxid aus dem Vorratstank (2) in den mobilen Tank (6), einer in der Füllleitung (3) angeordneten Förderpumpe (4) und mit einer mit dem mobilen Tank (6) verbindbaren Gasabzugsleitung (8) zum Abführen von Kohlendioxidgas aus dem mobilen Tank (6),
dadurch gekennzeichnet,
dass die Gasabzugsleitung (8) in einem thermisch isolierten Speichertank (10) für flüssiges Kohlendioxid ausmündet und in der Gasabzugsleitung (8) ein Wärmetauscher (15) angeordnet ist, der eine thermische Verbindung zwischen dem Kohlendioxidgas in der Gasabzugsleitung (8) und einer flüssigen Phase des im Vorratstank (2) bevorrateten Kohlendioxids herstellt.Device for filling a mobile tank with liquid carbon dioxide, with a thermally insulated, fixed storage tank (2) for storing liquid carbon dioxide, a filling line (3) connectable to a mobile tank (6) for conveying liquid carbon dioxide from the storage tank (2) in the mobile tank (6), one in the filling line (3) arranged feed pump (4) and with one with the mobile tank (6) connectable Gas discharge line (8) for removing carbon dioxide gas from the mobile tank (6),
characterized,
in that the gas discharge line (8) discharges into a thermally insulated liquid carbon dioxide storage tank (10) and a heat exchanger (15) is arranged in the gas discharge line (8), providing a thermal connection between the carbon dioxide gas in the gas discharge line (8) and a liquid phase produced in the storage tank (2) stored carbon dioxide. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass der Wärmetauscher (15) in einer einen unteren Teil des Vorratstanks (2) mit dem Kopfraum des Vorratstanks (2) verbindenden Kreislaufleitung (12) angeordnet ist.Apparatus according to claim 5, characterized in that the heat exchanger (15) in a lower part of the storage tank (2) with the headspace of the storage tank (2) connecting the circulation line (12) is arranged. Vorrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass der Wärmetauscher (15) innerhalb einer flüssigen Phase (19) des im Vorratstank (2) bevorrateten Kohlendioxids angeordnet ist.Apparatus according to claim 5 or 6, characterized in that the heat exchanger (15) within a liquid phase (19) of the storage tank (2) stored carbon dioxide is arranged. Vorrichtung nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, dass als mobiler Tank (6) ein zur Versorgung von kundenseitigen Tanks bestimmter Straßentankwagen oder Eisenbahnkesselwagen zum Einsatz kommt.Device according to one of claims 5 to 7, characterized in that as a mobile tank (6) is used for supplying customer-side tanks of road tankers or rail tank cars used. Verwendung eines Verfahrens nach einem der Ansprüche 1 bis 4 oder einer Vorrichtung nach einem der Ansprüche 5 bis 8 zum Befüllen von mobilen Tanks (6) mit flüssigem Kohlendioxid in Lebensmittelqualität.Use of a method according to one of claims 1 to 4 or a device according to one of claims 5 to 8 for filling mobile tanks (6) with food-grade liquid carbon dioxide.
EP16160181.0A 2015-03-14 2016-03-14 Method and device for filling a mobile tank with liquid carbon dioxide Withdrawn EP3081842A1 (en)

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CN112088135A (en) * 2018-12-13 2020-12-15 卡本库尔技术公司 Method and composite structure for delivering carbon dioxide
CN113509657A (en) * 2021-07-29 2021-10-19 西安科技大学 Mining constant-pressure liquid carbon dioxide fire preventing and extinguishing device and method
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