FR2821571A1 - Oil mist filtering system for plant such as gas turbine/alternator has cartridges able to take increased flow on starting - Google Patents

Oil mist filtering system for plant such as gas turbine/alternator has cartridges able to take increased flow on starting Download PDF

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Publication number
FR2821571A1
FR2821571A1 FR0102963A FR0102963A FR2821571A1 FR 2821571 A1 FR2821571 A1 FR 2821571A1 FR 0102963 A FR0102963 A FR 0102963A FR 0102963 A FR0102963 A FR 0102963A FR 2821571 A1 FR2821571 A1 FR 2821571A1
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Prior art keywords
tank
outlet
installation
oil
cartridges
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FR0102963A
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FR2821571B1 (en
Inventor
Louis Maurice Robert Tyack
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Societe dAcoustique Industrielle SARL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/003—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions including coalescing means for the separation of liquid
    • B01D46/0031—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions including coalescing means for the separation of liquid with collecting, draining means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2411—Filter cartridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/4272—Special valve constructions adapted to filters or filter elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The system, designed to filter oil mist from a recuperation chamber (4), comprises a filter housing (8) with coalescent cartridges (7) connected to the chamber by a suction outlet (5), and a motor/fan unit (11) connected to the housing outlet (9) to create a depression. The filter cartridges (7) are of dimensions that allow them to take a flow (Q), when the plant is started up, substantially greater than the flow (Q1) drawn in from the recuperation chamber. The system also has a recycling duct (12) to return part (Q2) of the cleaned air from the motor/fan unit back to the filter housing, with a regulating valve (13) to control the recycled flow, reducing it as the pressure from the suction outlet rises.

Description

<Desc/Clms Page number 1> <Desc / Clms Page number 1>

Figure img00010001
Figure img00010001

INSTALLATION DE FILTRATION DE BROUILLARDS D'HUILE

Figure img00010002

La présente invention concerne une installation de filtration des brouillards d'huile émanant sous forme de bulles d'une machine, telle qu'une turbine à gaz associée à un alternateur, dans laquelle machine l'huile sert de moyen de lubrification, de refroidissement et/ou d'agent hydraulique, cette installation comportant une cuve à huile dans laquelle l'huile provenant de ladite machine est récupérée, une enceinte de filtration à cartouches filtrantes coalescentes reliée à une sortie d'aspiration de ladite cuve, et un groupe moto-ventilateur relié à la sortie de ladite enceinte de filtration pour créer une dépression en amont de cette dernière, à savoir à la sortie d'aspiration de ladite cuve. OIL MIST FILTRATION SYSTEM
Figure img00010002

The present invention relates to an installation for filtering oil mists emanating in the form of bubbles from a machine, such as a gas turbine associated with an alternator, in which machine the oil serves as a means of lubrication, cooling and / or hydraulic agent, this installation comprising an oil tank in which the oil coming from said machine is recovered, a filtration chamber with coalescing filter cartridges connected to a suction outlet of said tank, and a power unit fan connected to the outlet of said filtration chamber to create a vacuum upstream of the latter, namely at the suction outlet of said tank.

A cette sortie d'aspiration on obtient ainsi un brouillard d'huile constitué de micro-particules et de vapeur, par suite de l'éclatement des bulles et de l'élévation de la température à la sortie du bain d'huile de la cuve. Ce brouillard d'huile est filtré par les cartouches de filtration coalescentes, lesquelles s'encrassent assez rapidement et produisent une augmentation de la perte de charge entre la sortie et l'entrée de l'enceinte de filtration, ce qui nécessite un changement assez fréquent de ces cartouches.  At this suction outlet, an oil mist consisting of micro-particles and vapor is thus obtained, due to the bursting of the bubbles and the rise in temperature at the outlet of the oil bath from the tank. . This oil mist is filtered by the coalescing filter cartridges, which clog up fairly quickly and produce an increase in the pressure drop between the outlet and the inlet of the filtration enclosure, which requires a fairly frequent change. of these cartridges.

Le but de la présente invention est de remédier à cet inconvénient et de rendre possible un accroissement très notable de la durée d'utilisation des cartouches.  The object of the present invention is to remedy this drawback and to make possible a very significant increase in the duration of use of the cartridges.

A cet effet, une installation de filtration du type défini au début est, conformément à la présente invention, caractérisée en ce que les cartouches filtrantes sont dimensionnées de sorte à véhiculer, au démarrage de l'installation, un débit notablement plus  To this end, a filtration installation of the type defined at the start is, in accordance with the present invention, characterized in that the filter cartridges are dimensioned so as to convey, at the start of the installation, a significantly greater flow rate.

<Desc/Clms Page number 2><Desc / Clms Page number 2>

important que celui qui est aspiré dans la cuve, et en ce que cette installation comporte une conduite de recyclage, vers l'entrée de l'enceinte de filtration, d'une partie du débit d'air épuré sortant du groupe moto-ventilateur, cette conduite étant pourvue d'un clapet de régulation réglable pour le contrôle automatique de ladite partie recyclée, de sorte que la dépression et le débit à la sortie d'aspiration de ladite cuve soient maintenus sensiblement constants quel que soit le degré d'encrassement des cartouches filtrantes et le régime de fonctionnement de ladite machine.  important that the one which is sucked into the tank, and in that this installation comprises a recycling line, towards the inlet of the filtration enclosure, of part of the flow of purified air leaving the motor-fan group, this pipe being provided with an adjustable regulating valve for the automatic control of said recycled part, so that the vacuum and the flow rate at the suction outlet of said tank are kept substantially constant whatever the degree of fouling of the filter cartridges and the operating regime of said machine.

Pour ce faire, le clapet de régulation est agencé pour provoquer une diminution du débit dans la conduite de recyclage lorsque la pression à la sortie d'aspiration de la cuve à huile augmente.  To do this, the regulating valve is arranged to cause a reduction in the flow rate in the recycling line when the pressure at the suction outlet of the oil tank increases.

On pourra ainsi utiliser les mêmes cartouches filtrantes beaucoup plus longtemps que dans les installations de la technique antérieure, typiquement jusqu'à un an.  This will allow the same filter cartridges to be used much longer than in prior art installations, typically up to a year.

Le fonctionnement d'une telle installation sera mieux compris à la lecture de l'exemple de réalisation décrit ci-dessous avec référence à la figure unique du dessin ci-annexé, qui est une vue schématique d'une telle installation.  The operation of such an installation will be better understood on reading the embodiment described below with reference to the single figure of the attached drawing, which is a schematic view of such an installation.

Sur cette figure on a référencé en 1 une machine tournante quelconque, par exemple une turbine à gaz, ayant une entrée d'air induit 2 et une sortie d'huile 3 en communication avec une cuve à huile 4 pourvue d'une sortie d'aspiration 5. Cette sortie d'aspiration, de débit Ql, débouche dans un caisson d'aspiration 6 en communication avec l'espace interne d'une série de cartouches coalescentes 7 disposées dans une enceinte de filtration 8 et par conséquent traversées de l'intérieur vers  In this figure, reference is made in 1 to any rotary machine, for example a gas turbine, having an induced air inlet 2 and an oil outlet 3 in communication with an oil tank 4 provided with an outlet suction 5. This suction outlet, of flow Ql, opens into a suction box 6 in communication with the internal space of a series of coalescing cartridges 7 arranged in a filtration chamber 8 and therefore crossed by the inside towards

<Desc/Clms Page number 3><Desc / Clms Page number 3>

l'extérieur par le brouillard d'huile à filtrer. La sortie 9 de cette enceinte est reliée à une conduite de rejet à l'atmosphère 10 comportant un moto-ventilateur anti- étincelles 11 assurant dans la conduite de sortie 9 un débit Q. Ce moto-ventilateur 11 permet aussi de vaincre la perte de charge dans les cartouches filtrantes 7 et de créer la dépression nécessaire dans la cuve à huile 4. En 16, enfin, on a représenté un récupérateur d'huile ramenant vers la cuve 4 l'huile accumulée au fond de l'enceinte de filtration 8 et du caisson d'aspiration 6.  the exterior by the oil mist to be filtered. The outlet 9 of this enclosure is connected to an atmospheric rejection pipe 10 comprising a non-sparking motor-fan 11 ensuring in the outlet line 9 a flow Q. This motor-fan 11 also makes it possible to overcome the loss of charge in the filter cartridges 7 and create the necessary vacuum in the oil tank 4. At 16, finally, there is shown an oil recovery unit bringing back to the tank 4 the oil accumulated at the bottom of the filtration chamber 8 and the suction box 6.

Ceci étant, on conçoit qu'en l'absence de toute conduite de recyclage, l'encrassement progressif des cartouches filtrantes 7 provoquerait une augmentation de la perte de charge entre la sortie et l'entrée de l'enceinte de filtration 8, et une diminution progressive de la dépression à la sortie 5 de la cuve à huile, ce qui entraînerait une réduction du débit Q1 produit par la machine 1, pouvant créer des disfonctionnements dans sa lubrification et son refroidissement.  This being the case, it is understandable that in the absence of any recycling line, the progressive fouling of the filter cartridges 7 would cause an increase in the pressure drop between the outlet and the inlet of the filtration enclosure 8, and a progressive reduction of the vacuum at the outlet 5 of the oil tank, which would cause a reduction in the flow rate Q1 produced by the machine 1, which could create malfunctions in its lubrication and cooling.

Conformément à l'invention et pour pallier cet inconvénient, une partie Q2 du débit Q est recyclée vers le caisson d'aspiration 6 par une conduite 12, le débit Q2 étant réglé manuellement, au démarrage de l'installation, grâce à un clapet de régulation 13 à ressort et battant aluminium, lequel clapet est réglable par un bouton accessible de l'extérieur 14. La pression dans la conduite 5 est alors contrôlée grâce à un manomètre 15. De la sorte, on obtient à la sortie d'air épuré 10 de l'installation un débit Q3 = Ql = Q-Q2. Outre qu'il permet de régler au démarrage le débit Q2, le clapet de régulation 13 est agencé pour provoquer une diminution du débit Q2 lorsque la pression dans la conduite 5 augmente.  In accordance with the invention and to overcome this drawback, a part Q2 of the flow Q is recycled to the suction box 6 by a pipe 12, the flow Q2 being adjusted manually, at the start of the installation, by means of a check valve. regulation 13 with spring and leaf aluminum, which valve is adjustable by a button accessible from the outside 14. The pressure in the pipe 5 is then controlled by a pressure gauge 15. In this way, one obtains at the outlet of purified air 10 of the installation a flow Q3 = Ql = Q-Q2. In addition to adjusting the flow Q2 at start-up, the regulating valve 13 is arranged to cause a decrease in the flow Q2 when the pressure in the line 5 increases.

<Desc/Clms Page number 4> <Desc / Clms Page number 4>

En outre, on prévoit des cartouches filtrantes 7 surdimensionnées, à savoir qu'elles sont dimensionnées de sorte à véhiculer, au démarrage de l'installation, un débit Q notablement plus important que celui Ql qui est aspiré dans la cuve 4.  In addition, oversized filter cartridges 7 are provided, namely that they are dimensioned so as to convey, at the start of the installation, a flow rate Q significantly greater than that Ql which is sucked into the tank 4.

Grâce à ces dispositions, on conçoit que l'on assurera pendant un laps de temps beaucoup plus grand la constance ou quasi constance du débit Ql aspiré dans la cuve à huile 4, avec un changement nettement plus espacé des cartouches filtrantes. En effet et quel que soit le niveau d'encrassement des cartouches, on aura Q-Q2 = Ql = cte, (avec Ql=Q3), puisque le clapet 13 permet de faire en sorte que Q2 diminue en même temps que Q. En d'autres termes, l'installation permet un ajustement automatique du débit aspiré à celui engendré par la machine 1 pendant toute la durée de vie des cartouches 7, à savoir pratiquement un an.  Thanks to these provisions, it is understood that we will ensure for a much greater period of time the constancy or almost constancy of the flow rate Ql aspirated in the oil tank 4, with a much more spaced change in the filter cartridges. Indeed, whatever the level of clogging of the cartridges, we will have Q-Q2 = Ql = side, (with Ql = Q3), since the valve 13 makes it possible for Q2 to decrease at the same time as Q. in other words, the installation allows an automatic adjustment of the aspirated flow rate to that generated by the machine 1 throughout the life of the cartridges 7, namely practically one year.

Il est à noter aussi que le débit Q2 étant repris dans le circuit de rejet à l'atmosphère, on évite d'induire dans les cartouches 7 un air pollué provenant de l'extérieur. It should also be noted that the flow rate Q2 being taken up in the atmospheric rejection circuit, it is avoided to induce in the cartridges 7 polluted air coming from the outside.

Claims (2)

REVENDICATIONS 1. Installation de filtration des brouillards d'huile émanant sous forme de bulles d'une machine (1), telle qu'une turbine à gaz associée à un alternateur, dans laquelle machine l'huile sert de moyen de lubrification, de refroidissement et/ou d'agent hydraulique, cette installation comportant une cuve à huile (4) dans laquelle l'huile provenant de ladite machine (1) est récupérée, une enceinte de filtration (8) à cartouches filtrantes coalescentes (7) reliée à une sortie d'aspiration (5) de ladite cuve (4), et un groupe moto-ventilateur (11) relié à la sortie (9) de ladite enceinte de filtration (8) pour créer une dépression en amont de cette dernière, à savoir à la sortie d'aspiration (5) de ladite cuve (4), caractérisée en ce que les cartouches filtrantes (7) sont dimensionnées de sorte à véhiculer, au démarrage de l'installation, un débit (Q) notablement plus important que celui (Q1) qui est aspiré dans la cuve (4), et en ce que l'installation comporte une conduite (12) de recyclage, vers l'entrée (6) de l'enceinte de filtration (8), d'une partie (Q2) du débit d'air épuré (Q) sortant du groupe moto-ventilateur (11), cette conduite (12) étant pourvue d'un clapet de régulation réglable (13) pour le contrôle automatique de ladite partie (Q2) recyclée, de sorte que la dépression et le débit (Q1=Q-Q2) à la sortie d'aspiration (5) de ladite cuve (4) soient maintenus sensiblement constants quel que soit le degré d'encrassement des cartouches filtrantes (7) et le régime de fonctionnement de ladite machine (1).  1. Installation for filtering oil mists emanating in the form of bubbles from a machine (1), such as a gas turbine associated with an alternator, in which machine the oil serves as a means of lubrication, cooling and / or hydraulic agent, this installation comprising an oil tank (4) in which the oil from said machine (1) is recovered, a filtration chamber (8) with coalescing filter cartridges (7) connected to an outlet suction (5) of said tank (4), and a motor-fan unit (11) connected to the outlet (9) of said filtration chamber (8) to create a vacuum upstream of the latter, namely to the suction outlet (5) of said tank (4), characterized in that the filter cartridges (7) are dimensioned so as to convey, at the start of the installation, a flow rate (Q) significantly greater than that ( Q1) which is sucked into the tank (4), and that the installation includes a recycling line (12), towards the inlet (6) of the filtration enclosure (8), of a part (Q2) of the purified air flow (Q) leaving the motor-fan unit (11), this line (12) being provided with an adjustable regulating valve (13) for the automatic control of said recycled part (Q2), so that the vacuum and the flow rate (Q1 = Q-Q2) at the suction outlet (5) of said tank (4) are kept substantially constant regardless of the degree of fouling of the filter cartridges (7) and the operating regime of said machine (1). 2. Installation selon la revendication 1, caractérisée en ce que le clapet de régulation (13) est agencé pour provoquer une diminution du débit (Q2) dans la conduite de 2. Installation according to claim 1, characterized in that the regulating valve (13) is arranged to cause a reduction in the flow rate (Q2) in the line of <Desc/Clms Page number 6><Desc / Clms Page number 6> recyclage (12) lorsque la pression à la sortie d'aspiration (5) de la cuve à huile (4) augmente. recycling (12) when the pressure at the suction outlet (5) of the oil tank (4) increases.
FR0102963A 2001-03-05 2001-03-05 OIL FOG FILTRATION INSTALLATION Expired - Lifetime FR2821571B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8011114B2 (en) * 2009-12-04 2011-09-06 Superior Investments, Inc. Vehicle dryer with butterfly inlet valve

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5718744A (en) * 1996-02-05 1998-02-17 Lubrication Systems Company Of Texas, Inc. Lubrication system demisting apparatus
US5806630A (en) * 1996-01-04 1998-09-15 Sistemas Centrales De Lubricacion, S.A. De C.V. Modular mist lubrication system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5806630A (en) * 1996-01-04 1998-09-15 Sistemas Centrales De Lubricacion, S.A. De C.V. Modular mist lubrication system
US5718744A (en) * 1996-02-05 1998-02-17 Lubrication Systems Company Of Texas, Inc. Lubrication system demisting apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8011114B2 (en) * 2009-12-04 2011-09-06 Superior Investments, Inc. Vehicle dryer with butterfly inlet valve
US8397401B1 (en) 2009-12-04 2013-03-19 Superior Investments, Inc. Vehicle dryer with butterfly inlet valve

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