DE728134C - Method and device for the continuous taking of samples from gases liquefied under pressure, in particular gas mixtures - Google Patents
Method and device for the continuous taking of samples from gases liquefied under pressure, in particular gas mixturesInfo
- Publication number
- DE728134C DE728134C DEI69906D DEI0069906D DE728134C DE 728134 C DE728134 C DE 728134C DE I69906 D DEI69906 D DE I69906D DE I0069906 D DEI0069906 D DE I0069906D DE 728134 C DE728134 C DE 728134C
- Authority
- DE
- Germany
- Prior art keywords
- capillary tube
- unheated
- pipe section
- under pressure
- gases
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2258—Sampling from a flowing stream of gas in a stack or chimney
- G01N2001/2261—Sampling from a flowing stream of gas in a stack or chimney preventing condensation (heating lines)
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Description
Verfahren und Vorrichtung zur fortlaufenden Entnahme von Proben von unter Druck verflüssigten Gasen, insbesondere Gasgemischen Es ist üblich, Proben von gasförmigen oder flüssigen Stoffen z. B. zum Zwecke der Analyse, der Molekulaxgewichtsbestimmung, der Gasdichtebestimmung und der Bestimmung anderer physikalischer Eigenschaften aus Behältern oder Rohrleitungen zu entnehmen, indem man die betreffenden Stoffe einfach durch ein Ventil und über eine Schlauchverbindüng in ein Prob enahmegefäß strömen läßt. Auch bei unter Druck verflüssigten Gasen hat sich diese Art der Probenahme eingeführt, jedoch muß dabei die Entnahmeleitung entweder vor oder hinter dem Entnahmeventil geheizt werden. Hierbei hat die Heizung vor dem Ventil den Nachteil, daß bereits vor der Entspannung Gasbildung.eintritt, die bei Gemischen infolge ungleichmäßiger Vergasung der einzelnen Gemischanteile zu einer Fälschung der Probe fuhren kann. Bei Heizung hinter dem Ventil ist zdie Probenahme, da das Ventil nicht mit erwärmt werden darf, häufigen Störungen unterworfenj insbesondere bei Anwesenheit von geringen Spuren von Wasser, die leicht zu Störungen im Ventil führen. Die Probenahme ist in beiden Fällen unkontrollierbaren Einflüssen ausgesetzt, und die Meßergebnisse werden daher unsicher.Method and device for the continuous taking of samples from Gases liquefied under pressure, especially gas mixtures It is common to take samples of gaseous or liquid substances such. B. for the purpose of analysis, molecular weight determination, the determination of gas density and the determination of other physical properties can be taken from containers or pipelines by adding the substances in question simply through a valve and a hose connection into a sample container lets flow. This type of sampling has also proven itself in the case of gases liquefied under pressure introduced, but the extraction line must either be before or after the extraction valve be heated. Here, the heating before the valve has the disadvantage that already gas formation occurs before the expansion occurs, which occurs in mixtures as a result of uneven Gasification of the individual mixture components can lead to a falsification of the sample. If the heater is behind the valve, sampling is necessary because the valve does not heat up subject to frequent disturbances especially in the presence of minor ones Traces of water that can easily lead to malfunctions in the valve. The sampling is in both cases exposed to uncontrollable influences, and the measurement results therefore become insecure.
Es hat sich gezeigt daß unter Druck verflüssigte Gase, insbesondere Gasgemische, in einfacher Weise und mit unveränderter Zusammensetzung aus Behältern oder Rohrleitungen entnommen werden können, wenn man die Entspannung mittels eines Sapillarrohres bewirkt. Es ist dabei leicht möglich, die erforderliche Verdampfungsvärme durch die Oberfläche des Kapillarrohres beispielsweise unter Anwendung eines Heirmanteis zuzuführen, ohne daß eine Störung der obengenannten Art während der Entspannung eintreten kann. Bei diesem Verfahren treten aber immer noch durch den unvermeidlichen Siedeverzug Störungen an der Eintrittsstelle der verflüssigten Gase in das Kapillarrohr auf. Diese lassen sich, wie sich gezeigt hat. mit Sicherheit dadurch vermeiden, daß dem beheizten Sapillarrohr ein kürzeres, nichtbeheiztes, noch keinen merklichen Druckverlust verursachendes Isapillarrohr vorgeschaltet wird. Dieses hat die Aufgabe, das verflüssigte Gas so in das beheizte Kapillarrohr überzuleiten, daß im Falle von plötzlich durch Gasbildun.g eintretenden Rückschlägen nicht die noch flüssigen Bestandteile in den Entnahmebehälter oder die Entnahmerohrleitung zurückgetrieben werden können, weil eb.en dadurch eine Änderung der Gaszusammensetzung und damit eine Fälschung des Ergebnisses entstände. Wird das nichtbeheizte Kapillarrohr auf der Temperatur des Behälters oder der Rohrleitung gehalten, so wird dadurch jede Störung vermieden. Die Anpassung der Temperatur des nichtbeheizten Kapillarrohres an die Temperatur des Entnahmebehäliers oder der Entnahmerohrleitung kann mit genügender Annäherung durch eine starke Anschlußrohrleitung und durch Einbau des Kapillarrohres in ein Rohr geschehen, das einer seits in gut wärmeleitender Verbindung mit der Metallmasse des Entnahmebehälters steht und das andererseits von dem beheizten Teil durch einen wärmeisolierenden Stoff gegen Erwärmung geschützt ist. It has been shown that gases liquefied under pressure, in particular Gas mixtures, in a simple manner and with an unchanged composition from containers or pipelines can be taken when one is relaxing by means of a Sapillarrohres causes. It is easily possible to achieve the required heat of evaporation through the surface of the capillary tube, for example using a Heirmanteis without causing a disturbance of the kind mentioned above during relaxation can occur. With this procedure, however, you still step through the inevitable Delayed boiling Disturbances at the point of entry of the liquefied gases into the capillary tube on. These can be, as has been shown. avoid with certainty that the heated sapillary tube a shorter, unheated, no noticeable pressure loss Isapillary tube causing the cause is connected upstream. This has the task of the liquefied To pass the gas into the heated capillary tube in such a way that in the event of sudden through Gas formation occurring backlashes not the still liquid components in the Withdrawal container or the withdrawal pipeline can be driven back because eb.en thereby a change in the gas composition and thus a falsification of the Result. If the unheated capillary tube is at the temperature of the The container or the pipeline is held, this avoids any disruption. The adaptation of the temperature of the unheated capillary tube to the temperature of the withdrawal container or the withdrawal pipeline can with sufficient approximation by a strong connecting pipe and by installing the capillary tube in a Pipe happen, on the one hand in a good heat-conducting connection with the metal mass of the removal container and the other hand from the heated part by a heat-insulating fabric is protected against heating.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEI69906D DE728134C (en) | 1941-06-26 | 1941-06-26 | Method and device for the continuous taking of samples from gases liquefied under pressure, in particular gas mixtures |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEI69906D DE728134C (en) | 1941-06-26 | 1941-06-26 | Method and device for the continuous taking of samples from gases liquefied under pressure, in particular gas mixtures |
Publications (1)
Publication Number | Publication Date |
---|---|
DE728134C true DE728134C (en) | 1942-11-20 |
Family
ID=7197058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEI69906D Expired DE728134C (en) | 1941-06-26 | 1941-06-26 | Method and device for the continuous taking of samples from gases liquefied under pressure, in particular gas mixtures |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE728134C (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3123982A (en) * | 1964-03-10 | Cryogenic gas sampler | ||
US3133444A (en) * | 1961-08-16 | 1964-05-19 | Linde Eismasch Ag | Sampling arrangement for liquid gases |
US3357256A (en) * | 1965-08-16 | 1967-12-12 | Air Reduction | Sampling line for cryogenic liquid mixtures |
DE2408845A1 (en) * | 1974-02-23 | 1975-08-28 | Linde Ag | SAMPLING DEVICE FOR LIQUID GASES |
NL2011993C2 (en) * | 2013-12-19 | 2015-06-22 | Hobrã Instr B V | SAMPLING SYSTEM FOR TAKING A HIGH PRESSURE SAMPLE FROM A HIGH PRESSURE GAS LINE. |
-
1941
- 1941-06-26 DE DEI69906D patent/DE728134C/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3123982A (en) * | 1964-03-10 | Cryogenic gas sampler | ||
US3133444A (en) * | 1961-08-16 | 1964-05-19 | Linde Eismasch Ag | Sampling arrangement for liquid gases |
US3357256A (en) * | 1965-08-16 | 1967-12-12 | Air Reduction | Sampling line for cryogenic liquid mixtures |
DE2408845A1 (en) * | 1974-02-23 | 1975-08-28 | Linde Ag | SAMPLING DEVICE FOR LIQUID GASES |
NL2011993C2 (en) * | 2013-12-19 | 2015-06-22 | Hobrã Instr B V | SAMPLING SYSTEM FOR TAKING A HIGH PRESSURE SAMPLE FROM A HIGH PRESSURE GAS LINE. |
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