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DE2814132A1 - Mechanical vacuum pump with polyethylene oxide sealing liquid - is useful in sterilisation plant operating with ethylene oxide - Google Patents

Mechanical vacuum pump with polyethylene oxide sealing liquid - is useful in sterilisation plant operating with ethylene oxide

Info

Publication number
DE2814132A1
DE2814132A1 DE19782814132 DE2814132A DE2814132A1 DE 2814132 A1 DE2814132 A1 DE 2814132A1 DE 19782814132 DE19782814132 DE 19782814132 DE 2814132 A DE2814132 A DE 2814132A DE 2814132 A1 DE2814132 A1 DE 2814132A1
Authority
DE
Germany
Prior art keywords
pump
ethylene oxide
vacuum pump
useful
sterilisation
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.)
Withdrawn
Application number
DE19782814132
Other languages
German (de)
Inventor
Michael Rannow
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Balzers und Leybold Deutschland Holding AG
Original Assignee
Leybold Heraeus GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Leybold Heraeus GmbH filed Critical Leybold Heraeus GmbH
Priority to DE19782814132 priority Critical patent/DE2814132A1/en
Publication of DE2814132A1 publication Critical patent/DE2814132A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
    • A61L2/20—Gaseous substances, e.g. vapours
    • A61L2/206—Ethylene oxide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/02—Liquid sealing for high-vacuum pumps or for compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/40—Sealings between relatively-moving surfaces by means of fluid

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

Liq.-tight mechanical vacuum pump has a sealing liq. of polethylene oxide (PEO) or other ethers with similar properties. The pump is a positive displacement pump, i.e. rotary piston pump, (rotary) slide valve pump, liq. ring pump etc. It is esp. useful for sterilisation plants operating with ethylene oxide (EO), e.g. in the cellulose industry and the mfr. of (disposable) medical equipment for the removal of the strongly toxic EO remaining after sterilisation. Unlike ordinary machine oils PEO is not attached by EO and hence retains its lubricating properties for long periods. Since the EO is not contaminated by PEO, it can be recycled, thus reducing costs and environmental pollution.

Description

Flüssigkeitsgedichtete mechanische Vakuumpumpe Liquid-sealed mechanical vacuum pump

Die Erfindung betrifft eine flüssigkeitsgedichtete mechanische Vakuumpumpe, die insbesondere für den Einsatz in mit Ethylenoxid arbeitenden Sterilisationsanlagen geeignet ist.The invention relates to a liquid-sealed mechanical vacuum pump, those especially for use in sterilization systems that work with ethylene oxide suitable is.

Tn der Zellstoffindustrie und bei der Herstellung von medizinischen @@beauch @gegenständen, wie Einmalspritzen, ist es bekannt, Ethylenid zu S vilisationszwecken zu verwenden. Ethlenoxid ist ein stack giftiges Gas.Tn the pulp industry and in the manufacture of medical @@ beauch @ objects, such as disposable syringes, it is known to use ethylenide for sterilization purposes to use. Ethylene oxide is a stack of toxic gases.

Nach der Durchführung von Sterilisationen verbleibt häufig auf d<r Oberfläche der sterilisierten gegenstände ein Rest der Sterilisationsgase. Wird hinsichtlich dieser Restgase eine vom Gesetz zuge ische Menge überschritten, dann ist es erforderlich, die sterilisierten Gegenstände einer Vakuumentgasung zu unterwefen und dadurch von den Restgasen zu befreien.After sterilization has been carried out, d <r often remains Surface of the sterilized objects a residue of the sterilization gases. Will with regard to these residual gases, an amount granted by law is exceeded, then it is necessary to subject the sterilized objects to vacuum degassing and thereby free from the residual gases.

Die Verwendung von mit gebräuchlichen Maschinenölen betriebenen flüssigkeitsgedichteten Vakuumpumpen ist bei derartigen Vakummenigasungsanlagen nicht möglich, da diese Maschinenöle vom Etylenoxyd angegriffen und oxydiert werden, so daß sie sehr schnell ihre Schmiereigenschaften verlieren. Die Verwendung von mit Wasser betriebenen Ringverdichtern oder Gasstrahlern hat den Nachteil, daß sich das Wasser und das EthyLenoxid gegenseitig verunreinigen. Das macht aufwendige Abwasser- und Abgasbegandlungen notwendig. Zur Zeit wird z.B. das nur einmal gebrauchte Ethylenoxid in d-ie Luft geblasen oder in Gaswäschern vernichtet und stellt damit - eine erhebliche Umweltbelastung dar.The use of liquid-sealed ones operated with common machine oils Vacuum pumps are not possible in such vacuum gassing systems because they Machine oils are attacked and oxidized by ethylene oxide, so that they are very quickly lose their lubricating properties. The use of water powered ring compressors or gas emitters has the disadvantage that the water and the ethylene oxide are mutually exclusive contaminate. That makes complex wastewater and exhaust gas treatments necessary. At the moment, for example, ethylene oxide, which has only been used once, is blown into the air or Destroyed in gas scrubbers and thus - represents a significant environmental burden.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine fliissigkeitsgedichtete mechanische Vakuumpumpe zu schaffen d-ie wesentlich besser für den Einsatz in Sterilisationsanlagen- geeignet ist.The present invention is based on the object of a liquid-sealed to create a mechanical vacuum pump which is much better for use in sterilization systems suitable is.

Die erfindungsgemäße Lösung dieser Aufgabe besteht darin, daß die Dichtflüssigkeit der mechanischen Vakuumpumpe aus Polyethylenoxid oder anderen Äthern mit ähnlichen Eigenschaften wie Polyethylenoxid besteht.The inventive solution to this problem is that the Sealing liquid of the mechanical vacuum pump made of polyethylene oxide or other ethers with properties similar to those of polyethylene oxide.

Die Verwendung derartiger Betriebsflüssigkeiten in mechanischen Vakuumpumpen macht es überhaupt erst möglich, diese Vakuumpumpen in mit Ethylenoxid betriebenen Sterilisationsanlagen einzusetzen.The use of such operating fluids in mechanical vacuum pumps makes it possible in the first place to use these vacuum pumps operated with ethylene oxide To use sterilization systems.

Polyethylenoxid wird von. Ethylenoxid nicht angegriffen, so daß sich die Schmiereigenschaften der Betriebsflüssigkeit über lange Zeiträume nicht verändern. Darüber hinaus wird umgekehrt, das Ethylenoxid nicht vom Polyethylenoxid verunreinigt, so daß es von der Pumpe auf Vorratsbehälter gedrückt werden kann, Das Sterilisationsgas kann deshalb mehrmals benutzt werden, was nicht nur die Betriebskosten der Sterilisationsanlage sondern- insbesondere auch die Umweltbelastung erheblich reduziert.Polyethylene oxide is made of. Ethylene oxide not attacked, so that do not change the lubricating properties of the operating fluid over long periods of time. In addition, conversely, the ethylene oxide is not contaminated by the polyethylene oxide, so that it can be pressed onto the storage container by the pump, the sterilization gas can therefore be used several times, which not only reduces the operating costs of the sterilization system but also, in particular, the environmental impact is significantly reduced.

Als BetriebsmitteL ist insbesondere Polyethylenoxid geeignet. Auch andere Äther mit ähnlichen Eigenschaften können Verwendung. finden.Polyethylene oxide is particularly suitable as operating medium. Even other ethers with similar properties can be used. Find.

Als besonders geeignete mechanische Pumpen oder Rotationsvakuumpumpen kommen die Verdrängerpumpen infrage, zu denen z.B. die Drehkolbenpumpen, Sperrschieberpumpen, Drehschieberpumpen und auch Flüssigkeitsringpumpen gehören.As particularly suitable mechanical pumps or rotary vacuum pumps positive displacement pumps come into question, including rotary lobe pumps, gate valve pumps, Rotary vane pumps and also liquid ring pumps belong.

Claims (2)

ANSPRÜCHE S Flüssigkeitsgedichtete mechanische Vakuumpumpe, dadurch gekennzeichnet, daß die Dichtflüssigkeit aus Polyethylenoxid oder anderen Äthern mit ähnlichen Eigenschaften besteht. CLAIMS S Liquid-sealed mechanical vacuum pump, thereby characterized in that the sealing liquid made of polyethylene oxide or other ethers with similar properties. 2. Vakuurnpumpe nach Anspruch 1, dadurch gekennzeichnet, daß sie als Verdrängerpumpe, d.h. als Drehkolbenpumpe, Sperrschieberpumpe, Drehschieberpumpe' Flüssigkeitsringpumpe oder dgl. 2. Vacuum pump according to claim 1, characterized in that it as a positive displacement pump, i.e. as a rotary lobe pump, gate valve pump, rotary vane pump ' Liquid ring pump or the like. ausgebildet ist. is trained.
DE19782814132 1978-04-01 1978-04-01 Mechanical vacuum pump with polyethylene oxide sealing liquid - is useful in sterilisation plant operating with ethylene oxide Withdrawn DE2814132A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19782814132 DE2814132A1 (en) 1978-04-01 1978-04-01 Mechanical vacuum pump with polyethylene oxide sealing liquid - is useful in sterilisation plant operating with ethylene oxide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782814132 DE2814132A1 (en) 1978-04-01 1978-04-01 Mechanical vacuum pump with polyethylene oxide sealing liquid - is useful in sterilisation plant operating with ethylene oxide

Publications (1)

Publication Number Publication Date
DE2814132A1 true DE2814132A1 (en) 1979-10-11

Family

ID=6035945

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19782814132 Withdrawn DE2814132A1 (en) 1978-04-01 1978-04-01 Mechanical vacuum pump with polyethylene oxide sealing liquid - is useful in sterilisation plant operating with ethylene oxide

Country Status (1)

Country Link
DE (1) DE2814132A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3204628A1 (en) * 1982-02-10 1983-09-22 Dynamit Nobel Ag, 5210 Troisdorf Process for extracting condensable gases from vacuum systems in chemical processes
WO1995032788A1 (en) * 1994-05-31 1995-12-07 Bernd Drzevitzky Process and device for disposing of ethylene oxide gas used for sterilisation purposes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3204628A1 (en) * 1982-02-10 1983-09-22 Dynamit Nobel Ag, 5210 Troisdorf Process for extracting condensable gases from vacuum systems in chemical processes
WO1995032788A1 (en) * 1994-05-31 1995-12-07 Bernd Drzevitzky Process and device for disposing of ethylene oxide gas used for sterilisation purposes

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