EP2401504B1 - Pompe à vide à anneau liquide - Google Patents

Pompe à vide à anneau liquide Download PDF

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Publication number
EP2401504B1
EP2401504B1 EP10708492.3A EP10708492A EP2401504B1 EP 2401504 B1 EP2401504 B1 EP 2401504B1 EP 10708492 A EP10708492 A EP 10708492A EP 2401504 B1 EP2401504 B1 EP 2401504B1
Authority
EP
European Patent Office
Prior art keywords
filter
liquid
vacuum pump
ring vacuum
circuit
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.)
Active
Application number
EP10708492.3A
Other languages
German (de)
English (en)
Other versions
EP2401504A2 (fr
Inventor
Detlef Gneuss
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.)
Gneuss GmbH
Original Assignee
Gneuss GmbH
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Publication date
Application filed by Gneuss GmbH filed Critical Gneuss GmbH
Publication of EP2401504A2 publication Critical patent/EP2401504A2/fr
Application granted granted Critical
Publication of EP2401504B1 publication Critical patent/EP2401504B1/fr
Active legal-status Critical Current
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Classifications

    • 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
    • F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
    • F04C19/004—Details concerning the operating liquid, e.g. nature, separation, cooling, cleaning, control of the supply

Definitions

  • the invention relates to a liquid ring vacuum pump for degassing plastic melts, with a pump inlet, are sucked at the gases and a pump outlet, are blown through the gases, and with a circuit for the compression fluid, in which a replaceable filter cartridge for filtering coarse impurities from the Compression fluid is provided, and optionally with a precondensation before the pump inlet for filtering fine impurities.
  • Such liquid vacuum pumps are e.g. used for extruder degassing.
  • contaminants such as Melt particles, etc.
  • Both the toxic components of the gases and the impurities are largely absorbed by the compression fluid.
  • the compression fluid in a circuit containing a replaceable filter cartridge, z. B. has a candle filter to clean.
  • the disadvantage here is that when the candle filter is clogged after more or less long life, the circuit must be interrupted so that the candle filter can be changed.
  • the impurities should condense out here. They deposit in the precondensation plant and must also be here from time to time be disposed of. Because of the high temperatures of the plastic melt gases, however, the impurities condense only with considerable effort, in particular cooling capacities, so that the known precondensation units only work dissatisfied and inadequate.
  • the DE 296 15 006 U1 or the US 2006/0110261 A1 already disclose a circulation device for water ring pumps, are separated in the coarse impurities on an inclined plane of the compression liquid, fine impurities are filtered through a cylindrical, spherical or conical filter.
  • the inclined plane and / or the filter have been added, the closed circuit must be opened and the impurities removed for the purpose of cleaning. Continuous operation is therefore just as impossible as the filtering of very fine contaminants.
  • the DE 41 18 787 A1 discloses a process integrated operating fluid cleaning system for compressors in which by means of a pervaporation membrane module, the operating fluid of the compressor is cleaned.
  • a membrane is used, through which the contaminated operating fluid can penetrate.
  • the impurities evaporate on the back of the membrane.
  • the membrane would become clogged. It would have to be exchanged. For this, the liquid ring vacuum pump would also have to be stopped and the otherwise closed loop for the compression fluid would have to be opened.
  • the DE 1 908 692 A1 discloses a device for closed loop vacuum continuous filtration.
  • the continuous filter proposed here works in a complex vacuum. Due to the necessary vacuum pumps and tanks such a continuous filter is very expensive.
  • polyester melts are to be degassed, then in addition to the impurities, even toxic impurities, larger amounts of water are sucked in by the liquid ring vacuum pump. These quantities of water also pass into the compression fluid. This water must be removed from the circulation of the compression fluid. To ensure that this water does not have to be disposed of as hazardous waste, a particularly thorough cleaning of the compression fluid must be ensured.
  • the invention is therefore based on the object to design a liquid ring vacuum pump so that it can continue to work continuously even with a filter change and the Kompressions remplikeitsniklauf need not be interrupted. Furthermore, the aim is that permanent stable process conditions arise, the handling of the filter system is simple and inexpensive and can be designed to be energy-saving and environmentally friendly.
  • the compression fluid circuit only one, even during a change of a used filter surface arranged against a new or cleaned filter surface in a closed Kompressions remplikeitsniklauf, continuously operating fine and / or Feinstfilter also the Feinstfilter can of course cause the fine filtering with ,
  • the fine filter is designed so that it even absorbs the toxic ingredients of the compression fluid, so that the expensive, and consuming to operate precondensation can be omitted.
  • Kompressions remplikeitsniklauf ensures that no interruptions of the circuit and no stopping the liquid ring vacuum pump for a filter change are necessary.
  • the continuous filter guarantees that when the filter surface in use threatens to clog, it is replaced by a new or cleaned filter surface.
  • the filter may be a continuous-bed filter cloth using a hollow-bed filter or a back-flushable rotary or sliding filter.
  • the filter cloth which emerges from the filter after the filter has been discharged, can be cleaned. But it is also possible to dispose of the filter cloth as hazardous waste and always provide a sufficient supply of new filter cloth.
  • the ultrafine filters have filter finenesses ⁇ 5 ⁇ . If filters with filter finenesses> 5 ⁇ are used, it has been found that the coarse impurities and even finer suspended matter are separated from the compression fluid. With filter sizes ⁇ 5 ⁇ it is achieved that pollutants dissolved even in the compression fluid are filtered out of the compression fluid. Thus, from an environmental point of view, an optimal cleaning of the compression fluid can be achieved.
  • the continuous filter is associated with a control device which, depending on and by monitoring the degree of contamination and / or the filter time and / or the pressure conditions on the filter and / or the flow rate conditions on the filter changing a used filter surface against a new or cleaned filter surface caused by further switching.
  • a control device which, depending on and by monitoring the degree of contamination and / or the filter time and / or the pressure conditions on the filter and / or the flow rate conditions on the filter changing a used filter surface against a new or cleaned filter surface caused by further switching.
  • an operator monitors the degree of contamination of the filter and manually causes a further switching of the filter elements.
  • a connection to the liquid ring vacuum pump can be saved, whereby the liquid ring vacuum pump can be made smaller.
  • a liquid separator is provided, which may be arranged outside of the liquid ring vacuum pump.
  • the liquid ring vacuum pump is also particularly suitable for degassing polyester melts, in which the sucked gases have relatively large amounts of water.
  • the invention will be explained in more detail with reference to a drawing.
  • the figure shows a liquid ring vacuum pump 1 with a pump inlet 2 and a pump outlet 3.
  • the liquid ring vacuum pump 1 is integrated into a circuit 4, in which the compression fluid is worked up.
  • the circuit 4 has a continuously operating filter 5, the motor 6 exchanges the filter element 7 via an indicated control device 8 in response to the contamination of the filter element.
  • the pump connection 3 is also designed as a connection of the circuit 4 at the same time.
  • a liquid separator 9 the exhaust air is separated from the compression liquid, which from the liquid separator 9 for continuously working Filter 5 arrives.
  • a cooling device 10 is provided, via which the compression fluid is brought to a desired level.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Degasification And Air Bubble Elimination (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Claims (8)

  1. Pompe à vide à anneau liquide (1) pour le dégazage de matières plastiques fondues, avec une entrée de pompe (2) au niveau de laquelle des gaz sont aspirés et une sortie de pompe (3) par laquelle des gaz sont expulsés, et avec un circuit (4) pour le liquide de compression, dans lequel il est prévu un insert de filtre remplaçable pour le filtrage d'impuretés grossières hors du liquide de compression, et le cas échéant avec un dispositif de précondensation en amont de l'entrée de pompe (2) pour le filtrage d'impuretés fines,
    caractérisée en ce que
    le circuit de liquide de compression (4) ne présente qu'un filtre fin et/ou ultrafin (5) travaillant en continu, disposé dans un circuit de liquide de compression (4) fermé même pendant un remplacement d'une surface de filtre usagée par une surface de filtre nouvelle ou nettoyée, un dispositif de réglage (8) étant attribué au filtre travaillant en continu (5), lequel entraîne le remplacement d'une surface de filtre usagée par une surface de filtre nouvelle ou nettoyée par basculement, en fonction du degré d'encrassement et/ou du temps de filtrage et/ou des rapports de pression au niveau du filtre et/ou des rapports de vitesse d'écoulement au niveau du filtre, tout en surveillant ceux-ci.
  2. Pompe à vide à anneau liquide (1) selon la revendication 1,
    caractérisée en ce que
    le filtre travaillant en continu (5) est un filtre à lit à cuvette travaillant avec une toile filtrante non tissée.
  3. Pompe à vide à anneau liquide (1) selon la revendication 1,
    caractérisée en ce que
    le filtre travaillant en continu (5) est un filtre rotatif ou un filtre à coulisse à nettoyage à contre-courant.
  4. Pompe à vide à anneau liquide (1) selon l'une des revendications 1 à 3,
    caractérisée en ce que
    les filtres ultrafins (5) présentant des unités de filtre < 5µ.
  5. Pompe à vide à anneau liquide (1) selon l'une des revendications 1 à 4,
    caractérisée en ce que
    un raccordement du circuit (4) est formé par la sortie de pompe (3), et en ce qu'un séparateur de liquide (9) est installé en aval de la sortie de pompe (3), par lequel l'air d'échappement est séparé du liquide de compression et peut être expulsé, pendant que le liquide de compression est alimenté vers le circuit (4).
  6. Pompe à vide à anneau liquide (1) selon l'une des revendications 1 à 5,
    caractérisée en ce que
    le circuit (4) comporte un dispositif de refroidissement (10).
  7. Pompe à vide à anneau liquide (1) selon l'une des revendications 1 à 6,
    caractérisée en ce que
    de l'eau est utilisée comme liquide de compression.
  8. Pompe à vide à anneau liquide (1) selon l'une des revendications 1 à 7,
    caractérisée en ce que
    la matière plastique fondue est un polyester fondu.
EP10708492.3A 2009-02-27 2010-02-26 Pompe à vide à anneau liquide Active EP2401504B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009010702A DE102009010702A1 (de) 2009-02-27 2009-02-27 Flüssigkeitsring-Vakuumpumpe
PCT/EP2010/001205 WO2010097233A2 (fr) 2009-02-27 2010-02-26 Pompe à vide à anneau liquide pour dégazer des matières plastiques fondues

Publications (2)

Publication Number Publication Date
EP2401504A2 EP2401504A2 (fr) 2012-01-04
EP2401504B1 true EP2401504B1 (fr) 2018-09-19

Family

ID=42371741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10708492.3A Active EP2401504B1 (fr) 2009-02-27 2010-02-26 Pompe à vide à anneau liquide

Country Status (7)

Country Link
US (1) US8608451B2 (fr)
EP (1) EP2401504B1 (fr)
CN (1) CN102333958B (fr)
BR (1) BRPI1009756B1 (fr)
DE (1) DE102009010702A1 (fr)
TR (1) TR201815888T4 (fr)
WO (1) WO2010097233A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013211084A1 (de) * 2013-06-14 2014-12-18 Siemens Aktiengesellschaft Verfahren zum Betrieb einer Wärmepumpe und Wärmepumpe
CN103480193B (zh) * 2013-09-27 2014-12-10 常熟市华能水处理设备有限责任公司 凝结水精处理器
CN104295519A (zh) * 2014-10-17 2015-01-21 陕西科技大学 一种控制装置、水环真空泵及其控制方法
FR3042236B1 (fr) * 2015-10-08 2019-09-06 Ortec Expansion Procede et dispositif pour le pompage d'un produit par aspiration.
DE102016003428B4 (de) 2016-03-21 2022-02-10 Richard Bethmann Wärmepumpenanlage
CN110354650A (zh) * 2019-07-30 2019-10-22 云南雷允上理想药业有限公司 一种真空系统除湿机组

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US943908A (en) * 1908-11-30 1909-12-21 Frank Baily Apparatus for straining liquids.
ES354847A1 (es) * 1968-05-08 1969-11-01 Bernardini Cost Mecc Spa Procedimiento de filtracion continua en vacio en circuito cerrado mediante el empleo de un filtro rotativo de tela filtrante continua especialmente guiada y lavada.
US3574509A (en) 1969-02-14 1971-04-13 Zurn Ind Inc Backwash filter
US3664509A (en) * 1969-11-04 1972-05-23 Trw Inc Fluids flow system with self-flushing revolving filter
DE2710445A1 (de) * 1977-03-10 1978-09-14 Peter Behr Kontinuierlich arbeitendes filter zum entfernen von flusen, fasern o.dgl. aus einem fluessigkeitsstrom
DE4118787A1 (de) * 1991-06-07 1992-12-24 Sihi Gmbh & Co Kg Prozessintegriertes betriebsfluessigkeitsreinigungssystem fuer verdichter
DE29615006U1 (de) * 1996-08-29 1996-10-17 Lipp Herbert Kreislaufeinrichtung für Wasserringpumpen
US6692234B2 (en) 1999-03-22 2004-02-17 Water Management Systems Pump system with vacuum source
CN2384664Y (zh) * 1999-07-23 2000-06-28 河海大学 过滤器全自动反冲洗装置
DE20010383U1 (de) * 2000-06-09 2000-08-31 Irema Filter Gmbh Filteranordnung
AU2001284325A1 (en) * 2000-08-31 2002-03-13 Barthlo Von_Moltitz Harmse A method of treating an effluent gas stream, and apparatus for use in such method
AT410942B (de) * 2001-10-29 2003-08-25 Fellinger Markus Verfahren und vorrichtung zur erhöhung der grenzviskosität von polyester
DE10225601A1 (de) * 2002-06-07 2003-12-24 Gneuss Kunststofftechnik Gmbh Reinigungsvorrichtung für Siebscheiben
DE10226463A1 (de) * 2002-06-13 2004-01-08 Faudi Filtersysteme Gmbh Filtereinrichtung und Verfahren zur Abreinigung von feinporigen Filtermitteln
CN2591296Y (zh) * 2002-12-29 2003-12-10 山东晨鸣纸业集团股份有限公司 水环式真空泵供水系统
FR2864523B1 (fr) * 2003-12-24 2006-12-22 Rivard Procede permettant d'empecher la formation d'une atmosphere insalubre et/ou explosive dans l'environnement d'une citerne ainsi que dispositif permettant la mise en oeuvre de ce procede
KR20070053265A (ko) 2004-09-17 2007-05-23 바스프 악티엔게젤샤프트 액체 고리 압축기의 작동 방법

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Also Published As

Publication number Publication date
TR201815888T4 (tr) 2018-11-21
WO2010097233A3 (fr) 2011-04-28
WO2010097233A2 (fr) 2010-09-02
BRPI1009756A2 (pt) 2016-03-15
US8608451B2 (en) 2013-12-17
EP2401504A2 (fr) 2012-01-04
US20110300005A1 (en) 2011-12-08
CN102333958B (zh) 2015-05-13
BRPI1009756B1 (pt) 2020-09-15
CN102333958A (zh) 2012-01-25
DE102009010702A1 (de) 2010-09-02

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