WO1998045642A1 - Device for dispensing liquid nitrogen - Google Patents
Device for dispensing liquid nitrogen Download PDFInfo
- Publication number
- WO1998045642A1 WO1998045642A1 PCT/NL1998/000187 NL9800187W WO9845642A1 WO 1998045642 A1 WO1998045642 A1 WO 1998045642A1 NL 9800187 W NL9800187 W NL 9800187W WO 9845642 A1 WO9845642 A1 WO 9845642A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- space
- liquid nitrogen
- nitrogen
- feed
- discharge
- 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.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from 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
- 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
- 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
- F17C2205/0341—Filters
-
- 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
- F17C2221/014—Nitrogen
-
- 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
- F17C2223/033—Small pressure, e.g. for liquefied gas
Definitions
- the invention lies in the field of dispensing liquid nitrogen. It is usual to make liquid nitrogen in a device suitable for this purpose and to fill a storage vessel with a discharge therewith.
- the driving force for metered dispensing of liquid nitrogen is the hydrostatic pressure, which is determined by the effective height of the liquid column.
- the evaporated liquid nitrogen in the vessel is vented to the environment via an open pipe . The pressure inside the vessel is therefore atmospheric.
- the liquid level of the liquid nitrogen corresponds with the pressure of the dispensed flow of liquid nitrogen.
- the invention now provides a device for dispensing liquid nitrogen, which device comprises: a heat exchanger with two spaces through which respective media can flow each having a feed and a discharge, which spaces are mutually separated by a heat- conducting partition; into which first space a liquid cooling medium with a temperature below the condensation temperature of nitrogen (about -192 * C) can be admitted via the feed and evaporated cooling medium can leave the first space; and into which second space gaseous nitrogen can be admitted which can condense in the second space such that liquid nitrogen can leave the second space via the dis- charge.
- the dispensed liquid nitrogen which can be used for instance for injection into metal cans, particularly for drinks and in PET bottles, is supplied to the device in the form of gas.
- the gas can be supplied at ambient temperature.
- Such a gas is very readily available and commercially obtainable in the generally known pressure cylinders.
- the gas is subjected according to the invention to a condensation in that it is guided through said second space, which is in cooling contact with the cooling medium in the first space via a heat-exchanging wall.
- the second space is directly connected to a metering unit which does not per se form part of the invention. It is important to note that in contrast to the described prior art, the flow rate of the dispensed liquid nitrogen is determined by the gas pressure.
- a specific embodiment of the device according to the invention has the special feature that in the feed of the first space is accommodated a control valve, by adjustment of which the flow rate of dispensed liquid nitrogen can be adjusted.
- the device can particularly be embodied such that the second space is bounded by a pipe extending in the first space.
- the embodiment is recommended in which the pipe has a form which enlarges the effective length in the first space.
- a per se known and effective form comprises a helical form.
- a specific embodiment has the feature that the pipe first extends downward from the inlet into the lower area of the second space, then extends upward over a certain height, for instance to a maximum of half the height of the first space, and finally extends downward to the discharge.
- the lowest middle zone of the pipe has a general U-shape with at least more or less vertical legs. Owing to the principle of communicating vessels a store of liquid nitrogen can, if desired, accumulate in this zone. By adjusting the gas pressure of the introduced gaseous nitrogen the liquid level on the side of the discharge can be pushed upward in these communicating vessels to dispense measured portions or a continuous flow of liquid nitrogen.
- the device is preferably embodied such that the first space is a thermally insulated vessel.
- the flow rate of the liquid nitrogen dispensed via the discharge is determined by the feed pressure of the gaseous nitrogen. This pressure can be adjusted very simply by a commercially available control valve. In this manner the flow rate of the liquid nitrogen can be controlled simply by means of a controller which operates at ambient temperature and therefore requires no special structure. A very large pressure range, for instance in the order of rt
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
A device for dispensing liquid nitrogen, which device comprises: a heat exchanger with two spaces through which respective media can flow each having a feed and a discharge, which spaces are mutually separated by a heat-conducting partition; into which first space a liquid cooling medium with a temperature below the condensation temperature of nitrogen (about -192 °C) can be admitted via the feed and evaporated cooling medium can leave the first space; and into which second space gaseous nitrogen can be admitted which can condense in the second space such that liquid nitrogen can leave the second space via the discharge.
Description
DEVICE FOR DISPENSING LIQUID NITROGEN
The invention lies in the field of dispensing liquid nitrogen. It is usual to make liquid nitrogen in a device suitable for this purpose and to fill a storage vessel with a discharge therewith. The driving force for metered dispensing of liquid nitrogen is the hydrostatic pressure, which is determined by the effective height of the liquid column. The evaporated liquid nitrogen in the vessel is vented to the environment via an open pipe . The pressure inside the vessel is therefore atmospheric. The liquid level of the liquid nitrogen corresponds with the pressure of the dispensed flow of liquid nitrogen.
The invention now provides a device for dispensing liquid nitrogen, which device comprises: a heat exchanger with two spaces through which respective media can flow each having a feed and a discharge, which spaces are mutually separated by a heat- conducting partition; into which first space a liquid cooling medium with a temperature below the condensation temperature of nitrogen (about -192 *C) can be admitted via the feed and evaporated cooling medium can leave the first space; and into which second space gaseous nitrogen can be admitted which can condense in the second space such that liquid nitrogen can leave the second space via the dis- charge.
In this device according to the invention the dispensed liquid nitrogen, which can be used for instance for injection into metal cans, particularly for drinks and in PET bottles, is supplied to the device in the form of gas. The gas can be supplied at ambient temperature. Such a gas is very readily available and commercially obtainable in the generally known pressure cylinders. The gas is subjected according to the invention to a condensation in that it is guided through said second space, which is in cooling contact with the cooling medium in the first space via a heat-exchanging wall. The second
space is directly connected to a metering unit which does not per se form part of the invention. It is important to note that in contrast to the described prior art, the flow rate of the dispensed liquid nitrogen is determined by the gas pressure.
In this respect a specific embodiment of the device according to the invention has the special feature that in the feed of the first space is accommodated a control valve, by adjustment of which the flow rate of dispensed liquid nitrogen can be adjusted.
The device can particularly be embodied such that the second space is bounded by a pipe extending in the first space.
In order to obtain the greatest possible heat-ex- changing surface between the first and the second space and the greatest possible residence time of the nitrogen for cooling in the second space, in the present case the pipe, the embodiment is recommended in which the pipe has a form which enlarges the effective length in the first space.
A per se known and effective form comprises a helical form.
A specific embodiment has the feature that the pipe first extends downward from the inlet into the lower area of the second space, then extends upward over a certain height, for instance to a maximum of half the height of the first space, and finally extends downward to the discharge. With such a structure is achieved that the lowest middle zone of the pipe has a general U-shape with at least more or less vertical legs. Owing to the principle of communicating vessels a store of liquid nitrogen can, if desired, accumulate in this zone. By adjusting the gas pressure of the introduced gaseous nitrogen the liquid level on the side of the discharge can be pushed upward in these communicating vessels to dispense measured portions or a continuous flow of liquid nitrogen.
The device is preferably embodied such that the first space is a thermally insulated vessel.
The invention will now be elucidated with reference to the annexed drawing of an embodiment. This drawing
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3 0
3
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TJ 0
Φ
H to ft)
-. l-1
< rt φ tr
Φ H
>l μ- PJ
Λ 3
3 Di μ-
D Di
3
TJ Φ
H
Φ rt
CO 0
Φ
3 rt rt tr
Φ μ-
3 TJ
H rt Φ tr CD
Φ ω
3
Ω H
0 φ
3
3 rt
3 tr
3 3 μ- D
Ω ft) rt
1
ing vessels in the" lower part of the pipe is pushed downward on the left side and upward on the right side whereby the liquid can escape into the downward directed part 19 of pipe 12 which connects onto discharge 2. The liquid nitrogen 3 can there be dispensed to successive, passing, filled containers for foodstuffs, drinks and the like which are still to be closed.
It will be apparent that the invention is not limited to the described and drawn embodiment . The device according to the invention has a number of important advantages relative to the described prior art .
(1) The control of the flow rate of the liquid nitrogen takes place outside the cryogenic range. Control of the pressure takes place in the gas phase. There is no necessity for cryogenic equipment in the gas phase, whereby the device can be relatively inexpensive and less susceptible to failure.
(2) The use of nitrogen gas as basis for forming liquid nitrogen makes it easy to filter the nitrogen prior to condensation. It is possible in this manner to use standard liquid nitrogen for the cooling vessel and standard gaseous nitrogen to form liquid nitrogen. Jamming of the system through accumulation of dirt present in nitrogen is thus practically precluded. This improves the reliability and reduces the cost price of the device.
(3) The supply system from storage container to the device according to the invention makes use of gas. No loss of gas will occur. In the case of the use of liquid nitrogen as in the prior art the liquid will partly evaporate and be lost .
(4) In the structure according to the invention the flow rate of the liquid nitrogen dispensed via the discharge is determined by the feed pressure of the gaseous nitrogen. This pressure can be adjusted very simply by a commercially available control valve. In this manner the flow rate of the liquid nitrogen can be controlled simply by means of a controller which operates at ambient temperature and therefore requires no special structure. A very large pressure range, for instance in the order of
rt
0 tr
Φ
3
CQ
Φ
Di
* *
*
Claims
1. Device for dispensing liquid nitrogen, which device comprises : a heat exchanger with two spaces through which respective media can flow each having a feed and a dis- charge, which spaces are mutually separated by a heat- conducting partition; into which first space a liquid cooling medium with a temperature below the condensation temperature of nitrogen (about -192 *C) can be admitted via the feed and evaporated cooling medium can leave the first space; and into which second space gaseous nitrogen can be admitted which can condense in the second space such that liquid nitrogen can leave the second space via the discharge .
2. Device as claimed in claim 1, wherein in the feed of the first space is accommodated a control valve, by adjustment of which the flow rate of dispensed liquid nitrogen can be adjusted.
3. Device as claimed in claim 1, wherein the second space is bounded by a pipe extending in the first space.
4. Device as claimed in claim 3, wherein the pipe has a form which enlarges the effective length in the first space.
5. Device as claimed in claim 3, wherein the pipe first extends downward from the inlet into the lower area of the second space, then extends upward over a certain height, for instance to a maximum of half the height of the first space, and finally extends downward to the discharge .
6. Device as claimed in claim 1, wherein the first space is a thermally insulated vessel.
*****
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU67502/98A AU6750298A (en) | 1997-04-04 | 1998-04-03 | Device for dispensing liquid nitrogen |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1005723A NL1005723C2 (en) | 1997-04-04 | 1997-04-04 | Liquid nitrogen delivery device. |
| NL1005723 | 1997-04-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1998045642A1 true WO1998045642A1 (en) | 1998-10-15 |
Family
ID=19764724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/NL1998/000187 Ceased WO1998045642A1 (en) | 1997-04-04 | 1998-04-03 | Device for dispensing liquid nitrogen |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU6750298A (en) |
| NL (1) | NL1005723C2 (en) |
| WO (1) | WO1998045642A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006133816A1 (en) * | 2005-06-17 | 2006-12-21 | Linde Aktiengesellschaft | Storage tank for cryogenic media |
| DE102006005885A1 (en) * | 2006-02-09 | 2007-08-16 | Messer Group Gmbh | Device for cooling liquid or gaseous media |
| WO2012150698A1 (en) * | 2011-05-02 | 2012-11-08 | 株式会社アイ・エイチ・アイ マリンユナイテッド | Boil-off gas processing device and liquefied gas tank |
| CN109884218A (en) * | 2019-04-12 | 2019-06-14 | 山东非金属材料研究所 | The preparation facilities and method of arsine gas standard substance in a kind of nitrogen |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2929709A1 (en) * | 1979-07-21 | 1981-02-12 | Messer Griesheim Gmbh | Supercooling of pressurised low-boiling liq. gases - to be delivered to metering device |
| EP0038673A2 (en) * | 1980-04-17 | 1981-10-28 | Union Carbide Corporation | Apparatus and process for delivering liquid cryogen |
| US4620962A (en) * | 1985-03-04 | 1986-11-04 | Mg Industries | Method and apparatus for providing sterilized cryogenic liquids |
| FR2599119A1 (en) * | 1986-05-26 | 1987-11-27 | Air Liquide | Method and device for delivering small quantities of a cryogenic liquid. |
| US4854128A (en) * | 1988-03-22 | 1989-08-08 | Zeamer Corporation | Cryogen supply system |
-
1997
- 1997-04-04 NL NL1005723A patent/NL1005723C2/en not_active IP Right Cessation
-
1998
- 1998-04-03 WO PCT/NL1998/000187 patent/WO1998045642A1/en not_active Ceased
- 1998-04-03 AU AU67502/98A patent/AU6750298A/en not_active Abandoned
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2929709A1 (en) * | 1979-07-21 | 1981-02-12 | Messer Griesheim Gmbh | Supercooling of pressurised low-boiling liq. gases - to be delivered to metering device |
| EP0038673A2 (en) * | 1980-04-17 | 1981-10-28 | Union Carbide Corporation | Apparatus and process for delivering liquid cryogen |
| US4620962A (en) * | 1985-03-04 | 1986-11-04 | Mg Industries | Method and apparatus for providing sterilized cryogenic liquids |
| FR2599119A1 (en) * | 1986-05-26 | 1987-11-27 | Air Liquide | Method and device for delivering small quantities of a cryogenic liquid. |
| US4854128A (en) * | 1988-03-22 | 1989-08-08 | Zeamer Corporation | Cryogen supply system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006133816A1 (en) * | 2005-06-17 | 2006-12-21 | Linde Aktiengesellschaft | Storage tank for cryogenic media |
| DE102006005885A1 (en) * | 2006-02-09 | 2007-08-16 | Messer Group Gmbh | Device for cooling liquid or gaseous media |
| EP1818633A3 (en) * | 2006-02-09 | 2008-07-09 | Messer Group GmbH | Device for cooling liquid or gaseous media |
| WO2012150698A1 (en) * | 2011-05-02 | 2012-11-08 | 株式会社アイ・エイチ・アイ マリンユナイテッド | Boil-off gas processing device and liquefied gas tank |
| JP2012233534A (en) * | 2011-05-02 | 2012-11-29 | Ihi Marine United Inc | Boil-off gas processing device and liquefied gas tank |
| CN109884218A (en) * | 2019-04-12 | 2019-06-14 | 山东非金属材料研究所 | The preparation facilities and method of arsine gas standard substance in a kind of nitrogen |
Also Published As
| Publication number | Publication date |
|---|---|
| NL1005723C2 (en) | 1998-10-07 |
| AU6750298A (en) | 1998-10-30 |
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