DE103912C - - Google Patents

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Publication number
DE103912C
DE103912C DENDAT103912D DE103912DA DE103912C DE 103912 C DE103912 C DE 103912C DE NDAT103912 D DENDAT103912 D DE NDAT103912D DE 103912D A DE103912D A DE 103912DA DE 103912 C DE103912 C DE 103912C
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DE
Germany
Prior art keywords
air
liquid
oxygen
weather
supply
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.)
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Application number
DENDAT103912D
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German (de)
Publication of DE103912C publication Critical patent/DE103912C/de
Active legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F3/00Cooling or drying of air

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Das vorliegende Verfahren bezweckt, durch Zufuhr von flüssiger Luft und ihr Verdunstenbezw. Ausströmenlassen in die Grubenbaue die Grubenlufttemperatur abzukühlen, »matte Wetter« in »gute Wetter« umzuwandeln und örtliche Ansammlungen von Schlagwettern unschädlich zu machen.The purpose of the present process is to supply liquid air and evaporate it. Allowing the air to flow out into the mine workings to cool down the mine air temperature, to convert "dull weather" into "good weather" and to render local accumulations of firedamp harmless.

Dieser dreifache Zweck wird erreicht durch die Nutzbarmachung der drei Haupteigenschaften der flüssigen Luft, nämlich beim Verdunsten, d. h. beim Uebergang aus dem flüssigen in den gasförmigen Aggregatzustand eine grofse Wärmemenge aus der Umgebung zu binden, also Kälte zu erzeugen, ihr Volumen auf das Tausendfache auszudehnen und den im Verhältnifs zur atmosphärischen Luft reicheren Sauerstoffgehalt an die umgebende Luft abzugeben. This threefold purpose is achieved by harnessing the three main properties the liquid air, namely during evaporation, d. H. on the transition from the liquid to the gaseous state of aggregation to bind a large amount of heat from the environment, thus to produce cold, to expand its volume to a thousandfold and that in proportion to release oxygen content richer than atmospheric air into the surrounding air.

Was zunächst die Abkühlung der Grubenlufttemperatur betrifft, so genügt es, darauf hinzuweisen, dafs 11 flüssiger Luft durch seine Verdampfung und Erwärmung bis auf 20° G. im Stande ist, etwa 120 Calorien der Umgebung zu entziehen, also etwa 30 cbm normaler Grubenluft von 200 C. auf io° C. abzukühlen. As far as the cooling of the pit air temperature is concerned, it suffices to point out that liquid air, through its evaporation and heating up to 20 ° G, is able to withdraw about 120 calories from the environment, i.e. about 30 cbm of normal pit air of 20 0 C. to cool down to 10 ° C.

Die Umwandlung »matter Wetter«, d.h. eines anormal zusammengesetzten, namentlich an C O2 reichen und an O armen Luftgemenges in »gute Wetter«, d. h. Wetter von der annähernden Zusammensetzung der atmosphärischen Luft, mit einem für den Athmungs- und Verbrennungsprocefs genügenden Sauerstoffgehalt, wird nicht nur infolge der durch Ausströmenlassen von flüssiger Luft bewirkten dire'cten Zufuhr eines an sich frischen Luftquantums, sondern daneben auch durch das Freiwerden der in diesem Luftquantum enthaltenen ungleich reicheren Sauerstoffmenge in kurzer Zeit vor sich gehen, da die flüssige Luft wegen der schwierigeren Verflüssigung des Stickstoffs etwa doppelt so viel Sauerstoff enthält als die atmosphärische Luft.The conversion "dull weather", ie one abnormal composite, especially of C O 2 rich and poor in O air batch in "good weather", ie weather from the approximate composition of the atmosphere, with a sufficient for the Athmungs- and Verbrennungsprocefs oxygen content, will take place in a short time not only as a result of the direct supply of a quantity of air which is fresh in itself, caused by the discharge of liquid air, but also as a result of the release of the incomparably richer quantity of oxygen contained in this quantity of air, since liquid air is more difficult to liquefy of nitrogen contains about twice as much oxygen as atmospheric air.

Den dritten Punkt — Unschädlichmachung von Schlagwetteransammlungen — anlangend, so wird dieser Zweck einmal schon durch die Verdünnung des ausströmenden Gasgemenges infolge der vermehrten Luftzufuhr, das andere Mal aber besonders durch die damit gleichzeitig erfolgende Abkühlung und Volumenverminderung desselben erreicht.Reaching the third point - rendering firedamp accumulations harmless - this is done by diluting the gas mixture flowing out as a result of the increased air supply, but the other time especially because of the simultaneous air supply achieved cooling and volume reduction of the same.

Praktische Versuche und Erfahrungen haben gelehrt, wie schnell die Intensität der Explosion und die Explosionsfähigkeit explosibeler Gasgemenge mit dem fortschreitenden Grade der Abkühlung der letzteren abnimmt.Practical tests and experience have taught how quickly the intensity of the explosion and the explosiveness of explosive gas mixtures with the advancing degree of Cooling of the latter decreases.

Von allen bisher bekannt gewordenen Vorschlägen und Hülfsmitteln zur Erreichung der eingangs angegebenen Zwecke kann hier zur Beurtheilung der besonderen eigenartigen Vortheile des vorgeschlagenen Verfahrens nur die Verwendung und Vertheilung von »Druckluft« in den Grubenbauen zum Vergleich herangezogen werden.Of all the proposals and tools that have become known so far to achieve the The purposes given at the beginning can be used here to assess the particular peculiar advantages of the proposed method only the use and distribution of "compressed air" can be used for comparison in the mine workings.

Es ist jedoch klar, dafs »Druckluft«, selbst solche höchster Spannung, da sie stets die normale Zusammensetzung der atmosphärischen Luft, der sie entnommen wurde, beibehält, den Grubenbauen keinen überschüssigen Sauerstoff zuführt, was die an Sauerstoff ungleich reichere »flüssige Luft« beim Ausströmen und Verdunsten ohne Weiteres thut.It is clear, however, that "compressed air", even of the highest tension, always has the maintains normal composition of the atmospheric air from which it was extracted, does not supply excess oxygen to the mines, which is unequal to oxygen richer "liquid air" easily does so when it flows out and evaporates.

Sodann sind in den Druckluftrohrleitungen die Reibungs- bezw. Spannungsverluste derart grofs, dafs in ausgedehnten Grubenbauen an den entfernten Betriebspunkten durch die Ausströmung der Druckluft und die gleichzeitig damit eintretende Wärmebindung infolge der Spannungsreduction die Grubenluft niemals auch nur annähernd so wirksam abgekühlt werden kann, wie dies bei der Ausströmung von flüssiger Luft der Fall sein würde, wenn man sie in derselben Weise durch Rohrleitungen den Betriebspunkten zuführte. Ueberdies würde in letzterem Falle der Temperaturverlust im Innern der Rohrleitung auf dem ganzen zu durchlaufenden Wege der angestrebten Temperaturerniedrigung der die Rohrleitung umgebenden Grubenluft schon zu Gute kommen.Then in the compressed air pipelines the friction respectively. Voltage losses like that great, that in extensive mine structures at the distant operating points by the outflow the compressed air and the thermal binding that occurs at the same time as a result of the stress reduction never the pit air can only be cooled approximately as effectively as it is with the outflow of liquid air would be the case if they were piped in the same way fed to the operating points. Moreover, in the latter case there would be a loss of temperature inside the pipeline along the entire path to be traversed Lowering the temperature of the pit air surrounding the pipeline is a good thing come.

Claims (1)

Patent-Anspruch:Patent claim: Ein Verfahren zur Bewetterung von Grubenbauen, dadurch gekennzeichnet, dafs flüssige Luft durch Röhren in die Grubenbaue geführt und in diesen zum Ausströmen gebracht wird.A method for ventilating mine workings, characterized in that the liquid Air is led through pipes into the mine workings and made to flow out into them.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2216504A3 (en) * 2009-02-05 2015-04-01 Linde AG A method and apparatus for cooling an underground space

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2216504A3 (en) * 2009-02-05 2015-04-01 Linde AG A method and apparatus for cooling an underground space

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