EP0001392A1 - Separation device for vapours from low-boiling liquefied gases, evolved during their transfer - Google Patents
Separation device for vapours from low-boiling liquefied gases, evolved during their transfer Download PDFInfo
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- EP0001392A1 EP0001392A1 EP78100720A EP78100720A EP0001392A1 EP 0001392 A1 EP0001392 A1 EP 0001392A1 EP 78100720 A EP78100720 A EP 78100720A EP 78100720 A EP78100720 A EP 78100720A EP 0001392 A1 EP0001392 A1 EP 0001392A1
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- Prior art keywords
- gas
- liquid
- container
- low
- hollow body
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- 239000007789 gas Substances 0.000 title claims abstract description 68
- 238000009835 boiling Methods 0.000 title claims abstract description 22
- 238000000926 separation method Methods 0.000 title description 4
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 238000001704 evaporation Methods 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000012071 phase Substances 0.000 abstract description 15
- 238000010276 construction Methods 0.000 abstract description 4
- 239000007791 liquid phase Substances 0.000 abstract description 3
- 230000005514 two-phase flow Effects 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 230000008020 evaporation Effects 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000007792 gaseous phase Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
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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
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/005—Details of vessels or of the filling or discharging of vessels for medium-size and small storage vessels not under pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C6/00—Methods and apparatus for filling vessels not under pressure with liquefied or solidified 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
- 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
- F17C2205/03—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
Definitions
- the invention relates to a device for separating the gas evaporating during the conveyance of low-boiling gases.
- Low-boiling gases such as oxygen, nitrogen, argon and methane are extracted and stored in a liquid state for economic reasons.
- Nitrogen in liquid form is used as the cooling medium for many machining processes.
- Evaporation losses are unavoidable with every delivery and storage of low-boiling liquefied gases, since even with the best insulation, the penetration of heat into the pipes and storage tanks cannot be completely avoided.
- In the equilibrium state each supply of heat causes the evaporation of a corresponding part of the liquefied gas. This evaporation can only be prevented by increasing the process pressure , which in many cases cannot be permitted for technical or economic reasons.
- the vaporized gas quantities present considerable difficulties, particularly when pumping low-boiling liquefied gases. Especially with long supply lines between the liquid gas storage and the place of use, which often cannot be avoided due to the spatial conditions in the factories, the difficulties caused by partial evaporation are considerable.
- the partial evaporation of the liquefied gas causes a two-phase flow when conveying in pipelines.
- Gas plugs can form, so that, for example, no liquid but gaseous nitrogen reaches the point of use. This means that the cold supply at the place of use is insufficient.
- phase separator between the liquid gas storage and the point of use. This ensures that the point of use is evenly supplied with low-boiling liquefied gas.
- the vaporized gas separated in the phase separator can also be directed to the point of use and support the cooling effect.
- phase separators are known for example from US Pat. No. 3,858,404. They basically consist of a container in which the low-boiling liquefied gas, which has already partially evaporated, is introduced. In the container, the liquid separates from the gas, so that both media can be removed from the container separately.
- phase separators work satisfactorily, the disadvantage is their relatively large construction volume and a rather uneconomical mode of operation. This is due to the fact that the partially evaporated, low-boiling, liquefied gas is divided into gas and liquid drops of various sizes as they enter the phase separator. While the larger drops fall to the bottom of the vessel and collect as a liquid, the smaller drops are entrained by the gas formed and also removed by the discharge line for the gas formed in the phase separator. This is synonymous with a loss of cooling liquid, which is particularly noticeable when the extracted gas cannot be used for cooling purposes.
- the phase separator In order to prevent the droplets of liquid from being carried as far as possible, the phase separator is built with a very large volume, because then the gas velocities remain lower and only the very small drops are entrained by the gas. Apart from the increased space requirements, the construction costs for the P hasensepa- generators this also greatly increased because the containers must be isolated and the insulation is expensive.
- the invention is therefore based on the object of a device for separating the deep in the promotion boiling liquefied gas evaporating gas, consisting of an insulated container with a supply line for the low-boiling liquefied gas and discharge lines for the separated gaseous and remaining liquid gas, as well as devices for controlling the level in the container and the supply of the low-boiling liquefied gas into the container create through which the entrainment of liquid droplets with the separated, vaporized gas is avoided and which also requires only an extremely small volume.
- this is achieved in that the supply line for the low-boiling liquefied gas in the container opens into a porous hollow body.
- the porous hollow body is preferably arranged in the upper region of the container.
- the feed line for the low-boiling liquefied gas is led through the upper container bottom into the container. It is particularly advantageous if not only the feed line, but also the discharge line and the lines for the control devices are led through the upper container bottom into the container by means of a common flange connection.
- the cold losses are kept low, since only a common thermal bridge is formed.
- the common flange connection enables the use and mutual exchange of different types of containers.
- the effectiveness of the device according to the invention is based on the fact that a Pre-separation between liquid and gas takes place.
- the liquid collects at the bottom of the porous hollow body and rains in the form of large drops in the insulated container. Due to their weight, these large drops are not carried away by the gas flow. It is therefore possible to allow high gas velocities and, accordingly, low construction volumes of the insulated containers.
- the porous hollow body can be arranged in the upper region of the insulated container. This reduces the overall height.
- the low-boiling liquefied gas is introduced in the middle of the container, so that as many drops as possible, which are initially entrained by the gas formed, still have the opportunity in the container to separate from the gas flow and move downwards fall.
- the insulated container 1 shown in FIG. 1 has a supply line 3, provided with a valve 2, for the low-boiling liquefied gas, which according to the invention opens into a hollow body 4 arranged in the container 1.
- the porous hollow body 4 is shown enlarged in FIG. 2.
- the liquefied gas which has entered the porous hollow body 4 through the feed line 3 separates into a liquid and a gaseous phase.
- the gaseous phase represented by the dashed arrows 5 escapes through the walls of the porous hollow body 4. All droplets of the liquid phase collect as a liquid bath 6 at the bottom of the porous hollow body 4.
- the emerging liquid drops are so heavy that they immediately fall down and cannot be entrained by the gas emerging from the porous hollow body 4.
- the porous hollow body 4 can therefore be arranged in the upper region of the insulated container 1.
- the container volume can therefore be used much better and its height can be reduced.
- the liquid emerging from the porous hollow body 4 collects at the bottom of the insulated container 1 as a liquid bath 8.
- the liquid is drawn off through the discharge line 10 provided with a valve 9. Accordingly, the gas phase is removed from the discharge line 12 by means of a discharge line 12 provided with a valve 11. Tray 1 removed.
- the regulation of the liquid supply through line 3 and the level in container 1 is carried out with the aid of pressure monitors 13 and 14 and induction switch 15 is filled.
- the pressure in container 1 increases during the filling process.
- the valve 11 is opened by means of the pressure switch 14. It then flows as long as a gas-liquid mixture through the conduit 3 and the porous hollow body 4 in the B-e container 1, is closed until the valve 2 via the liquid display 15, a induction switch. Only after the liquid level has dropped does the valve 2 open again, so that the gas-liquid mixture can flow into the phase separator again.
- G l indicates the weight of the gas-liquid mixture removed from the storage tank in the time t, in this case nitrogen.
- the throughput is given by m l
- G 2 gives the weight of the in at the same time t in the phase separator separated liquid nitrogen.
- the throughput and the pressure in the phase separator, that is to say in the insulated container 1, are represented by m 2 and P 2 .
- a high proportion of gas was achieved by greatly reducing the pressure in the insulated container 1 and additionally heating an evaporator coil used on a trial basis.
- the device works just as well if the gas portion is generated essentially only by supplying heat to the supply line 3.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum Abtrennen des bei der Förderung tiefsiedender Gase verdampfenden Gases.The invention relates to a device for separating the gas evaporating during the conveyance of low-boiling gases.
Tiefsiedende Gase, wie Sauerstoff, Stickstoff, Argon und Methan, werden aus wirtschaftlichen Gründen in flüssigem Zustand gefördert und gespeichert. Für viele Bearbeitungsverfahren wird Stickstoff in flüssiger Form als Kühlmedium eingesetzt. Bei jeder Förderung und Speicherung tiefsiedender verflüssigter Gase sind Verdampfungsverluste unvermeidbar, da auch bei bester Isolierung das Eindringen von Wärme in die Leitungen und Speicherbehälter nicht völlig vermieden werden kann. Im Gleichgewichtszustand ruft jede Wärmezufuhr die Verdampfung eines entsprechenden Teiles des verflüssigten Gases hervor. Diese Verdampfung kann nur durch Erhöhung des Verfahrensdruckes verhindert werden, die jedoch vielfach aus technischen oder wirtschaftlichen Gründen nicht zugelassen werden kann. Die verdampften Gasmengen bereiten insbesondere bei der Förderung von tiefsiedenden verflüssigten Gasen erhebliche Schwierigkeiten. Besonders bei langen Versorgungsleitungen zwischen dem Flüssiggasspeicher und der Einsatzstelle , welche sich aufgrund räumlicher Gegebenheiten in den Betrieben oft nicht vermeiden lassen, sind die Schwierigkeiten durch die teilweise Verdampfung erheblich.Low-boiling gases such as oxygen, nitrogen, argon and methane are extracted and stored in a liquid state for economic reasons. Nitrogen in liquid form is used as the cooling medium for many machining processes. Evaporation losses are unavoidable with every delivery and storage of low-boiling liquefied gases, since even with the best insulation, the penetration of heat into the pipes and storage tanks cannot be completely avoided. In the equilibrium state, each supply of heat causes the evaporation of a corresponding part of the liquefied gas. This evaporation can only be prevented by increasing the process pressure , which in many cases cannot be permitted for technical or economic reasons. The vaporized gas quantities present considerable difficulties, particularly when pumping low-boiling liquefied gases. Especially with long supply lines between the liquid gas storage and the place of use, which often cannot be avoided due to the spatial conditions in the factories, the difficulties caused by partial evaporation are considerable.
Die teilweise Verdampfung des verflüssigten Gases verursacht bei der Förderung in Rohrleitungen eine Zweiphasenströmung. Es können sich dabei Gaspfropfen bilden, so daß an die Einsatzstelle beispielsweise kein flüssiger, sondern gasförmiger Stickstoff gelangt. Dies führt dazu, daß das Kälteangebot an der Einsatzstelle unzureichend ist.The partial evaporation of the liquefied gas causes a two-phase flow when conveying in pipelines. Gas plugs can form, so that, for example, no liquid but gaseous nitrogen reaches the point of use. This means that the cold supply at the place of use is insufficient.
Eine Möglichkeit zur Abhilfe besteht darin, die Versorgungsleitung über eine Stichleitung ständig zu entgasen, um dadurch ein Verstopfen der Leitung mit Gas zu verhindern. Dies ist aber gleichbedeutend mit einem Verlust an Kühlmittel.One possible remedy is to continuously degas the supply line via a branch line in order to prevent the line from becoming blocked with gas. However, this is equivalent to a loss of coolant.
Eine bessere Möglichkeit bietet der Einbau eines Phasentrenners zwischen dem Flüssiggasspeicher und der Einsatzstelle. Dadurch wird sichergestellt, daß die Einsatzstelle gleichmäßig mit tiefsiedendem verflüssigten Gas versorgt wird. Das im Phasentrenner abgetrennte-verdampfte Gas kann ebenfalls zur Einsatzstelle geleitet werden und die Kühlwirkung unterstützen. Derartige Phasentrenner sind bekannt, beispielsweise aus der US-PS 3 858 404. Sie bestehen im Prinzip aus einem Behälter, in welchem das tiefsiedende verflüssigte Gas, welches bereits teilweise verdampft ist, eingeführt wird. Im Behälter trennt sich die Flüssigkeit vom Gas, so daß beide Medien aus dem Behälter getrennt abgezogen werden können.A better option is to install a phase separator between the liquid gas storage and the point of use. This ensures that the point of use is evenly supplied with low-boiling liquefied gas. The vaporized gas separated in the phase separator can also be directed to the point of use and support the cooling effect. Such phase separators are known for example from US Pat. No. 3,858,404. They basically consist of a container in which the low-boiling liquefied gas, which has already partially evaporated, is introduced. In the container, the liquid separates from the gas, so that both media can be removed from the container separately.
Diese Phasentrenner funktionieren zwar zufriedenstellend, nachteilig ist jedoch ihr verhältnismäßig großes Bauvolumen und eine recht unwirtschaftliche Betriebsweise. Dies ist darauf zurückzuführen, daß das teilweise verdampfte tiefsiedende verflüssigte Gas beim Eintritt in den phasenseparator in Gas und in Flüssigkeitstropfen unterschiedlichster Größe aufgeteilt wird. Während hierbei die größeren Tropfen zum Gefäßboden fallen und sich als Flüssigkeit sammeln, werden die kleineren Tropfen vom gebildeten Gas mitgerissen und durch die Abzugsleitung für das im Phasenseparator gebildete Gas mit entfernt. Dies ist gleichbedeutend mit einem Verlust an Kühlflüssigkeit, der insbesondere dann spürbar wird, wenn das abgezogene Gas nicht zu Kühlzwecken weiter verwendet werden kann.Although these phase separators work satisfactorily, the disadvantage is their relatively large construction volume and a rather uneconomical mode of operation. This is due to the fact that the partially evaporated, low-boiling, liquefied gas is divided into gas and liquid drops of various sizes as they enter the phase separator. While the larger drops fall to the bottom of the vessel and collect as a liquid, the smaller drops are entrained by the gas formed and also removed by the discharge line for the gas formed in the phase separator. This is synonymous with a loss of cooling liquid, which is particularly noticeable when the extracted gas cannot be used for cooling purposes.
Um das Mitreißen der Flüssigkeitströpfchen möglichst weitgehend zu verhindern, baut man den Phasenseparator sehr großvolumig, weil dann die Gasgeschwindigkeiten geringer bleiben und nur die sehr kleinen Tropfen vom Gas mitgerissen werden. Abgesehen von dem erhöhten Raumbedarf werden die Baukosten für die Phasensepa- ratoren hierdurch auch stark erhöht, weil die Behälter isoliert werden müssen und die Isolierung teuer ist.In order to prevent the droplets of liquid from being carried as far as possible, the phase separator is built with a very large volume, because then the gas velocities remain lower and only the very small drops are entrained by the gas. Apart from the increased space requirements, the construction costs for the P hasensepa- generators this also greatly increased because the containers must be isolated and the insulation is expensive.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung zum Abtrennen des bei der Förderung tiefsiedender verflüssigter Gase verdamfenden Gases, bestehend aus einem isolierten Behälter mit einer Zuführleitung für das tiefsiedende verflüssigte Gas und Abführleitungen für das abgetrennte gasförmige und verbliebene flüssige Gas, sowie Einrichtungen zur Regelung des Füllstandes im Behälter und der Zufuhr des tiefsiedenden verflüssigten Gases in den Behälter, zu schaffen, durch welche das Mitreißen von Flüssigkeitströpfchen mit dem abgetrennten, verdampften Gas vermieden wird und die außerdem nur ein äußerst geringes Bauvolumen benötigt.The invention is therefore based on the object of a device for separating the deep in the promotion boiling liquefied gas evaporating gas, consisting of an insulated container with a supply line for the low-boiling liquefied gas and discharge lines for the separated gaseous and remaining liquid gas, as well as devices for controlling the level in the container and the supply of the low-boiling liquefied gas into the container create through which the entrainment of liquid droplets with the separated, vaporized gas is avoided and which also requires only an extremely small volume.
Gemäß der Erfindung wird dies dadurch erreicht, daß die Zuführleitung für das tiefsiedende verflüssigte Gas im Behälter in einen porösen Hohlkörper mündet.According to the invention, this is achieved in that the supply line for the low-boiling liquefied gas in the container opens into a porous hollow body.
Der poröse Hohlkörper wird hierbei vorzugsweise im oberen Bereich des Behälters eingeordnet. Bei einer bevorzugten Ausführungsform der Erfindung wird die Zuführleitung für das tiefsiedende verflüssigte Gas durch den oberen Behälterboden in den Behälter geführt. Besonders vorteilhaft ist es, wenn nicht nur die Zuführleitung, sondern auch die Abführleitung und die Leitungen für die Regelungseinrichtungen mittels einer gemeinsamen Flanschverbindung durch den oberen Behälterboden in den Behälter geführt werden.The porous hollow body is preferably arranged in the upper region of the container. In a preferred embodiment of the invention, the feed line for the low-boiling liquefied gas is led through the upper container bottom into the container. It is particularly advantageous if not only the feed line, but also the discharge line and the lines for the control devices are led through the upper container bottom into the container by means of a common flange connection.
Hierbei werden die Kälteverluste gering gehalten, da nur eine gemeinsame Wärmebrücke gebildet wird. Außerdem ermöglicht die gemeinsame Flanschverbindung die Verwendung und den gegenseitigen Austausch verschiedener Behältertypen.The cold losses are kept low, since only a common thermal bridge is formed. In addition, the common flange connection enables the use and mutual exchange of different types of containers.
Die Wirksamkeit der erfindungsgemäßen Vorrichtung beruht darauf, daß in dem porösen Hohlkörper eine Vortrennung zwischen Flüssigkeit und Gas stattfindet. Die Flüssigkeit sammelt sich am Boden des porösen Hohlkörpers und regnet in Form großer Tropfen in den isolierten Behälter. Diese großen Tropfen werden infolge ihres Gewichtes vom Gasstrom nicht mitgerissen. Es können daher hohe Gasgeschwindigkeiten und dementsprechend geringe Bauvolumina der isolierten Behälter zugelassen werden.The effectiveness of the device according to the invention is based on the fact that a Pre-separation between liquid and gas takes place. The liquid collects at the bottom of the porous hollow body and rains in the form of large drops in the insulated container. Due to their weight, these large drops are not carried away by the gas flow. It is therefore possible to allow high gas velocities and, accordingly, low construction volumes of the insulated containers.
Die beim Eintritt in den porösen Hohlkörper sich bildenden kleinen FlUssigkeitstropfen können den porösen Hohlkörper nicht mit dem Gasstrom verlassen, sondern vereinigen sich mit den großen Tropfen zu einem Flüssigkeitsbad bestimmter Höhe im porösen Hohlkörper. Diese Flüssigkeit gelang ausschließlich in Form großer Tropfen aus dem porösen Hohlkörper. Das gebildete Gas durchdringt dagegen den porösen Hohlkörper ohne Schwierigkeiten an den Stellen, die von der Flüssigkeit nicht benetzt werden.The small liquid drops which form on entry into the porous hollow body cannot leave the porous hollow body with the gas flow, but rather combine with the large drops to form a liquid bath of a certain height in the porous hollow body. This liquid only came out of the porous hollow body in the form of large drops. The gas formed, on the other hand, penetrates the porous hollow body without difficulty at the points which are not wetted by the liquid.
Da die gebildete Flüssigkeit den porösen Hohlkörper ausschließlich in Form großer Tropfen verläßt, kann der poröse Hohlkörper im oberen Bereich des isolierten Behälters angeordnet werden. Dadurch wird die Bauhöhe verringert. Bei den bisherigen Phasenseparatoren er=- folgt dagegen die Einführung des tiefsiedenden verflüssigten Gases in der Mitte des Behälters, damit möglichst viele Tropfen, die zunächst vom gebildeten Gas mitgerissen werden, im Behälter noch die Gelegenheit haben, sich vom Gasstrom zu trennen und nach unten zu fallen.Since the liquid formed leaves the porous hollow body only in the form of large drops, the porous hollow body can be arranged in the upper region of the insulated container. This reduces the overall height. In the case of the previous phase separators, on the other hand, the low-boiling liquefied gas is introduced in the middle of the container, so that as many drops as possible, which are initially entrained by the gas formed, still have the opportunity in the container to separate from the gas flow and move downwards fall.
Die Zeichnungen veranschaulichen ein Ausführungsbeispiel der Erfindung.The drawings illustrate an embodiment of the invention.
Es zeigen:
- Fig. 1 eine erfindungsgemäße Vorrichtung, bei der sämtliche Leitungen durch den oberen Behälterboden geführt sind,
- Fig. 2 einen Querschnitt durch einen porösen Hohlkörper zur Vortrennung von Gas und Flüssigkeit.
- 1 shows a device according to the invention, in which all lines are led through the upper container bottom,
- Fig. 2 shows a cross section through a porous hollow body for the pre-separation of gas and liquid.
Der in Fig. 1 dargestellte isolierte Behälter 1 besitzt eine mit einem Ventil 2 versehene Zuführleitung 3 für das tiefsiedende verflüssigte Gas, welche erfindungsgemäß in einen im Behälter 1 angeordneten Hohlkörper 4 mündet. Der poröse Hohlkörper 4 ist in Fig. 2 vergrößert dargestellt. Das durch die Zuführleitung 3 in den porösen Hohlkörper 4 eingetretene verflüssigte Gas trennt sich in eine flüssige und eine gasförmige Phase. Die durch die gestrichelten Pfeile 5 dargestellte gasförmige Phase entweicht durch die Wände des porösen Hohlkörpers 4. Sämtliche Tröpfchen der flüssigen Phase sammeln sich als Flüssigkeitsbad 6 am Boden des porösen Hohlkörpers 4. Die Flüssigkeit perlt in Form großer Tropfen durch den Boden des porösen Hohlkörpers 4 nach unten, was durch ausgezogene Pfeile 7 dargestellt ist. Die austretenden Flüssigkeitstropfen sind so schwer, daß sie sofort nach unten fallen und nicht von dem aus dem porösen Hohlkörper 4 austretenden Gas mitgerissen werden können. Der poröse Hohlkörper 4 kann daher im oberen Bereich des isolierten Behälters 1 angeordnet werden. Das Behältervolumen kann daher viel besser ausgenutzt und seine Höhe verringert werden.The insulated container 1 shown in FIG. 1 has a supply line 3, provided with a valve 2, for the low-boiling liquefied gas, which according to the invention opens into a hollow body 4 arranged in the container 1. The porous hollow body 4 is shown enlarged in FIG. 2. The liquefied gas which has entered the porous hollow body 4 through the feed line 3 separates into a liquid and a gaseous phase. The gaseous phase represented by the
Da die schweren Flüssigkeitstropfen vom Gas nicht mitgerissen werden, können höhere Gasgeschwindigkeiten zugelassen werden, was gleichbedeutend mit einer weiteren Verringerung des Behältervolumens ist.Since the heavy liquid drops are not entrained by the gas, higher gas velocities can be permitted, which is tantamount to a further reduction in the container volume.
Die aus dem porösen Hohlkörper 4 ausgetretene Flüssigkeit sammelt sich am Boden des isolierten Behälters 1 als Flüssigkeitsbad 8. Die Flüssigkeit wird durch die mit einem Ventil 9 versehene Abführleitung 10 abgezogen. Entsprechend wird die Gasphase mittels der mit einem Ventil 11 versehenen Abführleitung 12 aus dem . Behälter 1 entfernt.The liquid emerging from the porous hollow body 4 collects at the bottom of the insulated container 1 as a
Die Regelung der Flüssigkeitszufuhr durch die Leitung 3 und des Füllstandes im Behälter 1 erfolgt mit Hilfe der Druckwächter 13 und 14 und des Induktionsschalters 15. Bei Absenkung unter einen vorgegebenen Druck im Behälter 1 schaltet der Druckwächter 13 das Ventil 2 ein, so daß der Behälter 1 gefüllt wird. Während des Füllvorgangs steigt der Druck im Behälter 1 an. Je nach eingestelltem Abblasdruck wird mittels des Druckwächters 14 das Ventil 11 geöffnet. Es strömt dann solange ein Gas-Flüssigkeitsgemisch durch die Leitung 3 und den porösen Hohlkörper 4 in den Be-hälter 1 ein, bis das Ventil 2 über die Flüssigkeitsanzeige mit Induktionsschalter 15 geschlossen wird. Erst nach dem Absinken des Flüssigkeitsspiegels wird das Ventil 2 wieder geöffnet, so daß erneut die Gas-Flüssigkeitsmischung in den Phasentrenner nachströmen kann.The regulation of the liquid supply through line 3 and the level in container 1 is carried out with the aid of
Sämtliche Leitungen treten von oben in den Behälter 1 ein und werden mittels einer gemeinsamen Flanschverbindung 16 zusammengefaßt. Die Zahl der Wärmebrücken wird hierdurch verringert, die Verdampfungsverluste demzufolge klein gehalten. Da keine Flüssigkeitströpfchen mit dem Gasstrom durch Abführleitung 12 mitgerissen werden, ergibt sich ein überaus guter Wirkungsgrad des Phasentrenners.All lines enter the container 1 from above and are combined by means of a
Außerdem können auch Gas-Flüssigkeitsgemische mit außerordentlich hohen Gasanteilen einwandfrei getrennt werden. Die nachfolgende Tabelle gibt Versuchsergebnisse wieder und zeigt, daß eine Trennung bis zu maximal 90% Gasanteil möglich ist:
In der Tabelle gibt Gl das Gewicht des in der Zeit t aus dem Lagertank entnommenen Gas-Flüssigkeitsgemisches, in diesem Fall Stickstoff, an. Der Mengendurchsatz wird durch ml, der Druck des Lagertanks durch P1 wiedergegeben. G2 gibt das Gewicht des in der Gleichen Zeit t im Phasentrenner abgetrennten flüssigen Stickstoffs an. Die Durchsatzmenge und der Druck im Phasentrenner, also im isolierten Behälter 1 werden durch m2 und P2 wiedergegeben. Im vorliegenden Versuchsbeispiel wurde ein hoher Gasanteil durch eine starke Absenkung des Druckes im isolierten Behälter 1 und eine zusätzliche Heizung einer versuchsweise eingesetzten Verdampferschlange erreicht. Selbstverständlich funktioniert die Einrichtung genauso gut, wenn der Gasanteil im wesentlichen nur durch Wärmezufuhr in die Zuführleitung 3 erzeugt wird.In the table, G l indicates the weight of the gas-liquid mixture removed from the storage tank in the time t, in this case nitrogen. The throughput is given by m l, the pressure of the storage tank by P. 1 G 2 gives the weight of the in at the same time t in the phase separator separated liquid nitrogen. The throughput and the pressure in the phase separator, that is to say in the insulated container 1, are represented by m 2 and P 2 . In the present experimental example, a high proportion of gas was achieved by greatly reducing the pressure in the insulated container 1 and additionally heating an evaporator coil used on a trial basis. Of course, the device works just as well if the gas portion is generated essentially only by supplying heat to the supply line 3.
Claims (4)
dadurch gekennzeichnet, daß die Zuführleitung (3) für das tiefsiedende verflüssigte Gas im Behälter (1) in einen porösen Hohlkörper (4) mündet.1. Device for separating the gas evaporating during the conveyance of low-boiling liquefied gases, consisting of an insulated container with a feed line for the low-boiling liquefied gas and discharge lines for the separated gaseous and remaining liquid gas, and devices for regulating the fill level in the container and the feed of the low-boiling liquefied gas in the container,
characterized in that the feed line (3) for the low-boiling liquefied gas in the container (1) opens into a porous hollow body (4).
dadurch gekennzeichnet, daß der poröse Hohlkörper (4) im oberen Bereich des Behälters (1) angeordnet ist.2. Device according to claim 1,
characterized in that the porous hollow body (4) is arranged in the upper region of the container (1).
dadurch gekennzeichnet, daß die Zuführleitung (3) durch den oberen Behälterboden in den Behälter (1) geführt ist.3. Device according to claim 1 or 2,
characterized in that the feed line (3) is led through the upper container bottom into the container (1).
dadurch gekennzeichnet, daß die Zuführleitung (3), die Abführleitungen (10,12) und die Leitungen für die Regelungseinrichtungen (13,14,15) mittels einer gemeinsamen Flanschverbindung (16) durch den oberen Behälterboden in den Behälter (1) geführt sind.4. Device according to one of claims 1 to 3,
characterized in that the feed line (3), the discharge lines (10, 12) and the lines for the control devices (13, 14, 15) are guided into the container (1) through the upper container base by means of a common flange connection (16).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2743131 | 1977-09-24 | ||
| DE2743131 | 1977-09-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0001392A1 true EP0001392A1 (en) | 1979-04-18 |
Family
ID=6019845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP78100720A Withdrawn EP0001392A1 (en) | 1977-09-24 | 1978-08-22 | Separation device for vapours from low-boiling liquefied gases, evolved during their transfer |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0001392A1 (en) |
| ES (1) | ES473412A1 (en) |
| IT (1) | IT1098870B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2923078A1 (en) * | 1979-06-07 | 1980-12-11 | Messer Griesheim Gmbh | DEVICE FOR SEPARATING THE GAS EVAPORATING DURING THE DEPOSIT OF LIQUID LIQUIDED GAS |
| DE3148426A1 (en) * | 1981-12-08 | 1983-06-23 | Messerschmitt-Bölkow-Blohm GmbH, 8000 München | Liquid/gas phase separator |
| US4546609A (en) * | 1983-05-30 | 1985-10-15 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Apparatus for providing a continuous stream of a cryogenic liquid and in particular liquid nitrogen |
| DE19717267A1 (en) * | 1997-04-24 | 1998-10-29 | Asea Brown Boveri | Process for processing frozen liquid gas |
| EP0999401A3 (en) * | 1998-11-05 | 2001-03-28 | Messer Griesheim Gmbh | Tapping head |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2970604A (en) * | 1958-06-24 | 1961-02-07 | Conch Int Methane Ltd | Liquid storage tanks and attachments |
| US3206939A (en) * | 1962-12-26 | 1965-09-21 | Union Carbide Corp | Cryogenic fluid transfer system |
| US3938347A (en) * | 1974-04-12 | 1976-02-17 | Optical Coating Laboratory, Inc. | Level control apparatus and method for cryogenic liquids |
-
1978
- 1978-08-22 EP EP78100720A patent/EP0001392A1/en not_active Withdrawn
- 1978-09-15 ES ES473412A patent/ES473412A1/en not_active Expired
- 1978-09-20 IT IT27875/78A patent/IT1098870B/en active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2970604A (en) * | 1958-06-24 | 1961-02-07 | Conch Int Methane Ltd | Liquid storage tanks and attachments |
| US3206939A (en) * | 1962-12-26 | 1965-09-21 | Union Carbide Corp | Cryogenic fluid transfer system |
| US3938347A (en) * | 1974-04-12 | 1976-02-17 | Optical Coating Laboratory, Inc. | Level control apparatus and method for cryogenic liquids |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2923078A1 (en) * | 1979-06-07 | 1980-12-11 | Messer Griesheim Gmbh | DEVICE FOR SEPARATING THE GAS EVAPORATING DURING THE DEPOSIT OF LIQUID LIQUIDED GAS |
| DE3148426A1 (en) * | 1981-12-08 | 1983-06-23 | Messerschmitt-Bölkow-Blohm GmbH, 8000 München | Liquid/gas phase separator |
| US4546609A (en) * | 1983-05-30 | 1985-10-15 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Apparatus for providing a continuous stream of a cryogenic liquid and in particular liquid nitrogen |
| DE19717267A1 (en) * | 1997-04-24 | 1998-10-29 | Asea Brown Boveri | Process for processing frozen liquid gas |
| US6079222A (en) * | 1997-04-24 | 2000-06-27 | Asea Brown Boveri Ag | Method for preparing deep-frozen liquid gas |
| DE19717267B4 (en) * | 1997-04-24 | 2008-08-14 | Alstom | Process for the preparation of refrigerated liquefied gas |
| EP0999401A3 (en) * | 1998-11-05 | 2001-03-28 | Messer Griesheim Gmbh | Tapping head |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1098870B (en) | 1985-09-18 |
| ES473412A1 (en) | 1979-05-16 |
| IT7827875A0 (en) | 1978-09-20 |
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