WO1998023363B1 - Preparation of homogeneous gas mixtures with sf¿6? - Google Patents

Preparation of homogeneous gas mixtures with sf¿6?

Info

Publication number
WO1998023363B1
WO1998023363B1 PCT/DE1997/002710 DE9702710W WO9823363B1 WO 1998023363 B1 WO1998023363 B1 WO 1998023363B1 DE 9702710 W DE9702710 W DE 9702710W WO 9823363 B1 WO9823363 B1 WO 9823363B1
Authority
WO
WIPO (PCT)
Prior art keywords
compressor
mixing station
buffer tank
compressed gas
gas mixture
Prior art date
Application number
PCT/DE1997/002710
Other languages
German (de)
French (fr)
Other versions
WO1998023363A8 (en
WO1998023363A1 (en
Filing date
Publication date
Priority to AT97949955T priority Critical patent/ATE221799T1/en
Application filed filed Critical
Priority to DE59707937T priority patent/DE59707937D1/en
Priority to DK97949955T priority patent/DK0946272T3/en
Priority to JP52413698A priority patent/JP3654533B2/en
Priority to US09/319,016 priority patent/US6105631A/en
Priority to HU0000101A priority patent/HU222790B1/en
Priority to PL97333775A priority patent/PL187032B1/en
Priority to EP97949955A priority patent/EP0946272B1/en
Publication of WO1998023363A1 publication Critical patent/WO1998023363A1/en
Publication of WO1998023363B1 publication Critical patent/WO1998023363B1/en
Priority to NO19992554A priority patent/NO317040B1/en
Priority to HK00102523A priority patent/HK1023301A1/en
Publication of WO1998023363A8 publication Critical patent/WO1998023363A8/en

Links

Abstract

Homogeneous compressed gas mixtures with SF6 and a gas with a density at least 4 g/l lower can be prepared by using a mixing station with at least the following elements: a gas premixer in which the separate gases are brought together; a static mixer (F) and/or a buffer tank connected thereto; a compressor (7) connected to the buffer tank (6) or static mixer (F); and when a buffer tank (6) is used, a return line (10) from the compressor output to the buffer tank (6). Mixtures of SF6 and N2, useful for example as insulating gas for current-conductive underground cables, can be produced by this process, which is capable of processing large flow rates. Mass flowmeters ensure high precision and reliability. Also disclosed is a mobile mixing station for implementing this process.

Claims

GEÄNDERTE ANSPRÜCHE[beim Internationalen Büro am 16. Juni 1998 (16.06.98) eingegangen; ursprüngliche Ansprüche 1-17 durch geänderte Ansprüche 1-15 ersetzt (3 Seiten)] CHANGED APPLICATIONS [received at the International Bureau on 16 June 1998 (16.06.98); original claims 1-17 replaced by amended claims 1-15 (3 pages)]
1. Verfahren zur Herstellung von im wesentlichen homogenen komprimierten Gasgemischen, die aus SF6 und N2 bestehen, aus getrennt voneinander vorliegenden Gasen, wobei man die getrennt voneinander vorliegenden Gase unter Bildung eines inhomogenen Gasgemisches vorvermischt, das inhomogene Gasgemisch in einen statischen Mischer und einen Puffertank leitet, Gasgemisch aus dem Puffertank in einen Kompressor leitet und aus dem Kompressor im wesentlichen homogenes komprimiertes Gasgemisch abzieht, wobei man einen Teil des aus dem Kompressor abgezogenen, im wesentlichen homogenen komprimierten Gasgemisches ├╝ber eine R├╝ckf├╝hrungsleitung in den Puffertank r├╝ckf├╝hrt, und man im wesentlichen homogene komprimierte Gasgemische erzeugt, die 3 bis 50 Vol-% SF6, vorzugsweise 3 bis 20 Vol-% SF6, Rest auf 100 Vol . -% N2 enthalten, wobei der gew├╝nschte Gehalt an SF6 in einer gezogenen Probe maximal um ┬▒0,7 Vol.-% von demjenigen Wert abweicht, der bei idealer Durchmischung vorliegt.1. A process for the preparation of substantially homogeneous compressed gas mixtures consisting of SF 6 and N 2 , from separately present gases, wherein the separately present gases premixed to form an inhomogeneous gas mixture, the inhomogeneous gas mixture in a static mixer and a Buffer tank passes, directs gas mixture from the buffer tank in a compressor and withdrawn from the compressor substantially homogeneous compressed gas mixture, wherein a part of the withdrawn from the compressor, substantially homogeneous compressed gas mixture via a return line in the Buffer tank returns, and it produces substantially homogeneous compressed gas mixtures containing 3 to 50% by volume SF 6 , preferably 3 to 20% by volume SF 6 , balance to 100 vol. -% N 2 , wherein the desired content of SF 6 in a drawn sample deviates by a maximum of Vol 0.7% by volume from that which exists with ideal mixing.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, daß man aus dem Kompressor ein Gasgemisch mit einem Druck von bis zu 13 bar abgibt.2. The method according to claim 1, characterized in that one emits from the compressor, a gas mixture at a pressure of up to 13 bar.
3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man einen ölfrei arbeitenden Kompressor einsetzt.3. The method according to claim 1, characterized in that daß one uses a ölfrei working compressor.
4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß man einen Kolben- oder Membrankompressor verwendet .4. The method according to claim 3, characterized in that one uses a piston or diaphragm compressor.
5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß in die Rückführungsleitung ein Regelventil eingebaut ist, welches die Gasgemischrückführung auf einen gewünschten Volumenanteil des abgegebenen komprimierten Gases einregelt. 135. The method according to claim 1, characterized in that in the return line, a control valve is installed, which adjusts the Gasgemischrückführung to a desired volume fraction of the discharged compressed gas. 13
6. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß man ein aus SF6 und N2 bestehendes Gemisch erzeugt und dieses als Isolatorgas in stromleitende Erdkabel eingeleitet wird.6. The method according to any one of the preceding claims, characterized in that a mixture consisting of SF 6 and N 2 is produced and this is introduced as insulator gas into current-conducting underground cables.
7. Verfahren nach Anspruch 1, dadurch gekennzeichnet, da├ƒ man zu vermischende Gasstr├╢me unter Verwendung von Massendurchflu├ƒmessern regelt.7. The method according to claim 1, characterized in that one controls to be mixed gas streams using Massenendurchflu├messern.
8. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß es unter Verwendung einer mobilen Mischstation durchgeführt wird.8. The method according to claim 1, characterized in that it is carried out using a mobile mixing station.
9. Mischstation zur Anwendung gemäß einem der Ansprüche 1 bis 8, welche aufweist: mindestens 2 Zuführungsleitungen zur Zuführung der zu vermischenden Gase; eine Gasleitung zur gemeinsamen Weiterleitung der vorvermischten Gase; einen stationären Mischer, in den die Gasleitung zur gemeinsamen Weiterleitung der vorvermischten Gase mündet; einen Puffertank; eine Gasleitung, die mit dem Puffertank und einem Kompressor verbunden ist, durch welche Gasgemisch aus dem Puffertank in den Kompressor geleitet wird; einen Kompressor, in welchem das aus dem Puffertank oder stationären Mischer abgeleitete Gasgemisch komprimiert und homogenisiert wird; eine Entnahmeleitung zur Ableitung des homogeneh komprimierten Gasgemisches aus dem Kompressor; eine Rückführungsleitung, die mit der Entnahmeleitung aus dem Kompressor und dem Puffertank verbunden ist; ein Regelventil in der Rückführungsleitung.9. Mixing station for use according to one of claims 1 to 8, which comprises: at least 2 Zuführungsleitungen for feeding the gases to be mixed; a gas line for the common forwarding of the premixed gases; a stationary mixer, into which the gas line for the common forwarding of the premixed gases m ;ndet; a buffer tank; a gas conduit connected to the buffer tank and a compressor through which gas mixture is supplied from the buffer tank to the compressor; a compressor in which the gas mixture derived from the buffer tank or stationary mixer is compressed and homogenized; a sampling line for discharging the homogeneh compressed gas mixture from the compressor; a return line connected to the withdrawal line from the compressor and the buffer tank; a control valve in the return line.
10. Mischstation nach Anspruch 9, dadurch gekennzeichnet, daß sie weiterhin umfaßt: mindestens eine Halterung zur Aufnahme von Druckgasflaschen eines oder mehrerer der unver- mischten Gase; Anschlüsse zum Anschluß einer Druckgasflasche zur Einfüllung des homogenen komprimierten Gasgemisches;- mindestens eine Halterung für eine solche Druckgasflasche. 1410. mixing station according to claim 9, characterized in that it further comprises: at least one holder for receiving compressed gas cylinders of one or more of the unmixed gases; Connections for connecting a compressed gas cylinder for filling the homogeneous compressed gas mixture, - at least one holder for such a compressed gas cylinder. 14
11. Mischstation nach Anspruch 9 oder 10, dadurch gekennzeichnet, da├ƒ sie mindestens ein weiteres Bauteil aus der Gruppe umfassend Manometer, Druckminderer, Durchflu├ƒmesser, Abnahmestelle oder Abnahmestellen f├╝r Probeentnahme aufweist.11. Mixing station according to claim 9 or 10, characterized in that it comprises at least one further component from the group comprising manometer, pressure reducer, Durchfluß├ƒmesser, take-off point or take-off points for sampling.
12. Mischstation nach Anspruch 11, dadurch gekennzeichnet, daß sie als Durchflußmesser Massendurchflußmesser aufweist.12. Mixing station according to claim 11, characterized in that it has a mass flowmeter as a flowmeter.
13. Mobile Mischstation, umfassend13. Mobile mixing station, comprising
a) die Mischstation nach einem der Anspr├╝che 9 bis 12; b) ein Fahrgestell, wobei die Mischstation auf dem Fahrgestell montiert ist.a) the mixing station according to any one of claims 9 to 12; b) a chassis with the mixing station mounted on the chassis.
14. Mobile Mischstation nach Anspruch 13 , dadurch gekennzeichnet, daß das Fahrgestell ein Lastkraftwagen, ist.14. Mobile mixing station according to claim 13, characterized in that the chassis is a truck.
15. Mischstation nach einem der Ansprüche 9 bis 14, gekennzeichnet durch Mittel, die die Mischstation gegen Außeneinflüsse wie Schmutz und Witterung abschirmen. 15. Mixing station according to one of claims 9 to 14, characterized by means which shield the mixing station against external influences such as dirt and weather.
PCT/DE1997/002710 1996-11-28 1997-11-19 Preparation of homogeneous gas mixtures with sf¿6? WO1998023363A1 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
HU0000101A HU222790B1 (en) 1996-11-28 1997-11-19 Preparation of homogeneous gas mixtures with sf6 and installation for them and mobile mixing station
DE59707937T DE59707937D1 (en) 1996-11-28 1997-11-19 PRODUCTION OF HOMOGENIC GAS MIXTURES WITH SF6
DK97949955T DK0946272T3 (en) 1996-11-28 1997-11-19 Preparation of homogeneous gas mixtures with SF6
JP52413698A JP3654533B2 (en) 1996-11-28 1997-11-19 Production of homogeneous gas mixture using SF bottom 6
US09/319,016 US6105631A (en) 1996-11-28 1997-11-19 Preparation of homogeneous gas mixtures with SF6
AT97949955T ATE221799T1 (en) 1996-11-28 1997-11-19 PRODUCTION OF HOMOGENEOUS GAS MIXTURES WITH SF6
PL97333775A PL187032B1 (en) 1996-11-28 1997-11-19 Method of obtaining homogenous gaseous mixtures containing sf6
EP97949955A EP0946272B1 (en) 1996-11-28 1997-11-19 Preparation of homogeneous gas mixtures with sf6
NO19992554A NO317040B1 (en) 1996-11-28 1999-05-27 Process for the preparation of homogeneous gas mixtures with SF <N> 6 </N>
HK00102523A HK1023301A1 (en) 1996-11-28 2000-04-27 Preparation of homogeneous gas mixtures with sf6

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19649254 1996-11-28
DE19649254.8 1996-11-28

Publications (3)

Publication Number Publication Date
WO1998023363A1 WO1998023363A1 (en) 1998-06-04
WO1998023363B1 true WO1998023363B1 (en) 1998-07-30
WO1998023363A8 WO1998023363A8 (en) 2001-04-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1997/002710 WO1998023363A1 (en) 1996-11-28 1997-11-19 Preparation of homogeneous gas mixtures with sf¿6?

Country Status (18)

Country Link
US (1) US6105631A (en)
EP (1) EP0946272B1 (en)
JP (1) JP3654533B2 (en)
KR (1) KR100492149B1 (en)
CN (1) CN1089626C (en)
AT (1) ATE221799T1 (en)
CZ (1) CZ298163B6 (en)
DE (3) DE59707937D1 (en)
DK (1) DK0946272T3 (en)
ES (1) ES2178025T3 (en)
HK (1) HK1023301A1 (en)
HU (1) HU222790B1 (en)
NO (1) NO317040B1 (en)
PL (1) PL187032B1 (en)
PT (1) PT946272E (en)
RU (1) RU2186613C2 (en)
WO (1) WO1998023363A1 (en)
ZA (1) ZA9710738B (en)

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