DE2510225A1 - SEPARATOR FOR SEPARATING LIQUID FROM GASES - Google Patents

Description

PATENT LAWYERS

Dlpl.-lng. P. WIRTH ■ Dr. V. SCH MIED-KOWARZIK Dlpl.-lng. G. DANNENBERG Dr. P. WEINHOLD Dr. D. GUDEL

281134 β FRANKFURTAM MAIN

TELEPHONE (08113

287014 GR. ESCHENHEIMER STRASSE 39

Case 2-204 W.-Germany 6.3.1975 Gu / gm

Pall Corporation 30 Sea Cliff Avenue Glen Cove, N.Y. 11542 United States

Separator for separating liquids from gases

The invention relates to a separator for separating liquids suspended in gases, in particular of oil from gases, for example air.

Turbo jet engines, turbofan engines, bypass engines and turbo engines are used to power aircraft. Turbo engines are available as wheeled and stationary Drives * used. These types of engines are commonly referred to as gas turbine engines and have a compressor, a combustion chamber and a turbine. To prevent air from entering the rotating surfaces of the motor

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If the oil pan seeps through, an air seal is provided, generally lip and / or lip seals Labyrinth seal. The seal is through from the outside

hits, the turbine exiting air pressurizes / and there through all If some air escapes from the seals, the oil pan must have an air outlet in order to limit the pressure increase. the Air by mixing with the oil through the gearbox causing foaming and foaming, along with vaporous oil and trapped oil droplets released into the air in aerosol form.

Such oil droplets can be deposited on the ground and are present in the vicinity of airports where there is considerable There is traffic, as well as on highways used by vehicles equipped with gas turbine engines or in the vicinity of stationary gas turbine drives. The resulting oil deposits collect dust and others. Material particles from the air. Besides the difficulty of this remove, they can pose safety and environmental risks if they are in the air, accumulate on runways, highways, and the interior and exterior surfaces of buildings. With the rising Application of gas turbine engines and current efforts to prevent air pollution is It has become indispensable to develop a system that will do this serves to effectively and more or less completely separate oil trapped in this way, independently

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whether the oil is in aerosol form or in the form of larger ones oil droplets is collected, while at the same time a small back pressure acts on the system.

The amount of oil lost in this way has a important function in relation to the running costs of the turbine; in addition, it is necessary to check the oil level more often and frequent topping up of the oil pan is highly undesirable.

Usually the oil pan is connected to the engine exhaust; this is a major contributor to air pollution.

Although it is known that the exhaust gases from gas turbine engines are responsible for the release of oil into the air is, it has so far not been practically possible to separate the oil before leaving the engine, namely due to the very small amount of oil in terms of volume and flow rate. For example, conventional Process for spraying the vapors with water or for condensing the oil and derivative vapors in the exhaust gases with subsequent separation of the aerosols impractical, because they reduce the gas flows in question and their

so

Volume not / to be managed that the existing small amounts of oil can be separated.

Lubricating oils for gas turbines vary considerably with regard to the oil application temperatures, and

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different glidants or lubricants are used. When the oil temperatures are comparatively low and when lubricants are used under low vapor pressure

is
so / the amount of steam collected in the air discharge from the tub is negligibly small. In turbines where the ¹ x temperatures are high or where oils are used under high steam pressure, the amount of oil transferred in the form of steam can be considerable. In such applications, a heat exchanger with a coolant, which may be ambient air, can be used to reduce the temperature of the discharged air so that almost all of the oil vapor is condensed into mist or smoke and consists of fine droplets, usually of diameter in the range between 0.1 and 1.0 microns, preferably 0.2 to 0.5 microns. Such a mist is very difficult to condense and can, for example, be passed unhindered through any centrifugal or impact separator.

The invention proposes a separator that is used for separating and optionally also for recovering from collected in gases Liquid is used, in particular, to separate the substantially entire amount of oil that is in the form of droplets Gases, e.g. air, with a low pressure limitation of substantially less than 0.5 psi (=

0.035 kp / cm) is collected.

The separator according to the invention is not in the exhaust pipe of the engine but in a ventilation pipe

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intended. from a reservoir for the lubricating oil to the oil pan /

The separated oil is passed through a return line recovered to the oil pan so that a considerable saving in oil consumption is achieved.

For this purpose, the separator according to the invention is characterized in that that a device for combining the liquid droplets is provided, wherein in a first stage of Combiner, the collected liquid droplets are combined into droplets of sufficient size so that these can be influenced by gravity, and a portion of the oil droplets condensed in this way to the bottom of the Unifier can be brought, and that in a second stage of the unifier most of the remaining partially condensed droplets, further combined and is drained to the bottom of the combiner.

The liquid collected in the separator is drawn off and can be
/ in the case of lubricating oil, for example, are fed back into the oil pan. The gas emanating from the separator, although free of oil droplets, may contain oil in vapor form and it may be returned to the compression inlet of the engine so that the oil vapor is also consumed before the gas is exhausted into the air.

The separator according to the invention is therefore particularly suitable for use in a gas turbine engine, the Separator in the gas discharge line from the oil pan

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-O-

can be attached. All of the gas exiting the pan is then passed through the separator. Through this it is ensured that all oil droplets trapped in the gas are removed. The liquid that has been separated out in this way oil, which may contain oil in vapor form, is returned to the compressor and the combustion chamber. From it it follows that the entire gas stream, which may possibly contain liquid oil droplets, is passed through the separator and that the oil vapor remaining therein is burned, so that oil-free exhaust gas from the compressor, the combustion chamber and exhausted from the turbine so that essentially no gas is introduced into the air which can deposit oil.

The separator according to the invention can optionally have additional elements that have the sound-absorbing properties raise. For this purpose, additional unification and separation layers are provided, which are also used for sound dampening contribute, in addition to their union and / or separation function. Will the gas through such sound-absorbing or sound-absorbing materials, the noise level is also reduced.

The uniting device of the present invention is a nonwoven mat of relatively low density and relative high porosity, where porosity is defined as the percentage of holes provided. In this respect it differs The device according to the invention differs from known devices of this type which are used in liquid-liquid associations be used. In US-PS 3,268, 442 are in liquid

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liquids suspended in it wholly or are partially immiscible, deposited by uniting the droplets in which they are passed through a small pipe whose diameter is much smaller than the diameter of the suspended droplets. The line can be designed in a conventional manner, for example as a simple, straight through line, or as a winding multi-forked line, which is formed by interconnected meshes of a large number of fibers. Training way and length of this conduit are not important, however the diameter is relative to the diameter of the droplets critical. Preferably the conduit has a diameter that is less than two thirds to about one tenth the diameter of the smallest droplets suspended in the treated fluid medium, and on each Fall less than 4/5 the average diameter of the suspended droplets. The line can be a bigger one Have diameters over part of their length, provided that at one point on the line such minimum diameter is provided. The smallest diameter of the line is preferably provided at its inlet or adjacent to it. Such a union device in the form of a nonwoven mat has a high density and relatively low porosity.

In contrast, the diameter of the conduit can be considerably larger than the diameter of the droplets when combined liquid droplets are trapped in the gas. the

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Association apparently does not result from the pressed through the line droplets, but by de: ^r large fiber surface and the multiple direction changes experienced by the gas as it flows through the mat. The gas throws the droplets with the larger diameter by inertia against the fiber mat, and the droplets stick to the fibers as a result. The smaller diameter particles are randomly moved by Brown's motion and have a statistically greater chance of contacting and adhering to the surface over a large surface area. Furthermore, they collide with one another and combine to form larger droplets which are removed by inertia. Thus, the conduit diameter is of less importance than the surface area of the fibers and a nonwoven mat of low density and high porosity (ie, with a high percentage of holes or a high volume of holes) with a large surface area can indeed

Oil droplets

greater likelihood of collisions and unions / allow than a low-porosity structure with smaller ones Openings, but less surface area.

Any fibrous and oil-inert material can find use as a nonwoven mat. Suitable materials include glass, quartz, ceramic, titanium dioxide, aluminum oxide, Polyvinyl chloride, polyethylene, polypropylene, polyacrylonitrile, polyester, polyvinylidene chloride, regenerated cellulose, Asbestos, cellulosic acid, resin-impregnated cotton and polyterafluoroethylene.

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The fibers are long enough so that they

(non-woven) hanging fiber fleece mat / train. Neither her length nor her Diameters are critical; However, in order to achieve an effective association it is important that the nonwoven mat has a large surface area and high density. Fine fibers are better suited for this than coarse fibers. Usually the fiber diameter is in Range between about 0.5 to 5.0 microns.

The density of the fiber fleece mat is controlled by the fact that the mat is enclosed by dimensionally stable cover sheets. The dimensional stability of the sheets must be such that the nonwoven mat is held under the differential gas pressures applied over the layer without noticeable distortion or breakage. The density of the layers should generally be in the range from about 0.05 to 0.5 g / cm, preferably between about 0.2 to 0.4 g / cm. As " Cover sheets may be sintered metal particle sheets and, if desired, plastic or sheet metal sheets Metal wire mesh, namely rolled, pressed and also connected by sintering, furthermore sheets of perforated Metal or plastic as well as resin-impregnated perforated fibreboard.

Since the fibrous unification layer is enclosed by cover sheets is, it is not necessary that the fibers of the layer are fused together. Indeed it can in the case of a long-fiber medium, provided there is no binding agent

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at hand, the porosity of the layer will be greater. and as a result the pressure drop across the layer is lower. To ensure a high separation efficiency of the collected oil droplets To achieve this, it is desirable that the pressure drop across the union layer be kept as low as possible will.

However, if short fibers are used, improved fiber retention and reduced compaction can thereby be achieved be achieved that the fibers are welded with a synthetic resin. Phenol formaldehyde resins, urea formaldehyde resins, Melamine-formaldehyde resins, epoxy resins and others are suitable as binders. It becomes a conventional one Welding process is used, which therefore does not need to be explained in more detail here, with the exception of that of course the amount of resin is less than that amount which undesirably increases the porosity of the mat decreased. Just enough resin should be used so that the fibers are coated and welded together is guaranteed at their points of contact. The corresponding amount is quickly determined by simply calculating the Surface area of the individual fibers, length and diameter are determined. Usually 3 to 50 wt.% Resin sufficient for fibers 0.1 to 2.0 microns in diameter.

A preferred method of making mats that

according to the invention
can be used as a unifier is that

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a fiber pulp suspended in water with a controlled pH value is spread on a cloth that is placed on the fabric

is placed on a Fourdrinier dryer or / a papermaking machine. Negative pressure can be used to reduce the pressure Fibers form a mat on the back of the cloth by condensation, which is then removed from the holding fabric Will get removed. The fibers can be applied in a similar manner from an air suspension.

The scraper is a sheet of porous material that is coarser than that of the primary union layer; but he has one Such pore size that the combined oil droplets do not are able to flow through the pores or openings of this layer while the gas flows freely through can. Porous polyurethane foam with open cells can be used as the curved scraper which has a porosity in the range between approx. 50 to

2 2 2 150 pores per inch (1 inch = 6.45 cm), where the average diameter of a pore is in the range between approx. 0.005 to 0.02 inches (= 0.13-0.51 mm), and preferably has a hole volume greater than 80 percent. Any other material, for example a coarser one Glass fiber mat or a mat made of synthetic or natural organic fibers can be used as a scraper provided the pore size and hole volume are in the same range.

Most of the oil present in the form of a mist, which accrues on the first: unification stage _{ becomes larger droplets

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condensed, flowing by gravity to the bottom of the combiner and, consequently, into the oil pan. A small part, however, usually between about 2 and 15

of percent, is instead captured in the exiting air in the form of proportionately large droplets, e.g. 2 inches or more in diameter (= 5.08 mm). These are on the Accumulated scrapers. If the scraper is placed at an angle to the horizontal, the combined will flow Oil by gravity down the scraper, collects on the floor, is sucked off and to the oil container or the oil pan returned.

The polyurethane foam can be made from any polyurethane resin that does not come into contact with oil are dirty. Any polymer of diisocyanate and a glycol can be used, including aliphatic Diisocyanates and aliphatic glycols, aromatic diisocyanates and aliphatic glycols, aliphatic Diisocyanates and aromatic glycols, aromatic diisocyanates and aromatic glycols, cycloaliphatic diisocyanates and aliphatic glycols, aliphatic diisocyanates and cycloaliphatic glycols and all mixtures from these, in any desired proportions.

It is often desirable to use the unifying and wiping elements To be arranged concentrically, each element being cylindrical or in another closed configuration.

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forms is, in each case in the interior of the other element. In order to create a larger surface in an enclosed space, the unifier can be corrugated or corrugated. The union can be the outer of two elements, which is provided concentrically in such a way that a flow from the outside takes place inwards and gas and oil are collected in the middle, with the oil from the surface of the wiper element is collected, is moved downwards by gravity and the air is discharged upwards. However, it usually becomes preferred to make a reverse arrangement, the flow is from the inside out, because the speed the air exiting the wiper is lower, so that there is less possibility of catching droplets of

the scraper. If the separator has a single raised

direction to / silencing, it may be desirable be to arrange the combiner and the stripping element so that the combiner at the innermost point and the The scraper is arranged at the outermost point to give the silencer a larger surface area and a larger volume as well as to achieve a higher sound absorption. In this case, the flow flows from the inside to the outside through the separator.

A concentric arrangement is not essential, but for many uses very beneficial. The unifying and wiping elements can also be designed as flat or corrugated sheets be formed with the flow being from side to side of the composite assembly that

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is arranged contiguously.

Increased sound attenuation is obtained by adding additional layers of the combiner and scraper elements be provided in the separator. These layers can be used in front of or behind the reducer, as well in front of or behind the scraper or simultaneously with the material of the combiner and the scraper, whereby a Gradual sound attenuation occurs with each * level of additional material for joining and stripping. Here is It goes without saying that the materials forming the combiner and the scraper allow for gradual sound absorption or soundproofing are suitable. In many cases, however, these items are not sufficient Soundproofing suitable, so that additional layers are required for this, although these are for unifying or Stripping is not needed. The additional elements increase the efficiency of the oil separation. While it is in a Complete composition can be difficult, any layer only the sound absorption function or to assign the function of the union and the sound absorption or the stripping, whereby an implementation of both Functions is guaranteed, it can be assumed that a given layer is primarily used for sound absorption or suitable for steaming, while this is not necessary for cleaning or stripping, whereby but the device works in this regard even in the absence of such a layer.

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As sound absorption or sound-absorbing material, porous Paper foam material, such as polyurethane foam or Nonwoven mats, e.g. fiberglass mats, can be used. As many layers can be added as it is for is necessary for the intended purpose. If the layers have a suitable porosity so that the pressure drop is normal there is no upper limit to the number of such layers that can be provided.

The density of the sound-absorbing or sound-absorbing Layers is not critical, but in general the higher the density, the better the sound attenuation, which also means the effectiveness of the combiner is increased, which is due to a larger surface area of the material, "that then is present within a given volume, with sound attenuation primarily a function of the surface area together with the effectiveness of the merger,

the
although / volume is also important.

While the porosity is not critical, it goes without saying that the porosity is a sound absorbing or sound-absorbing layer downstream of the scraper may be larger than that of a similar layer upstream is arranged by the combiner because the air flowing downstream from the scraper is freed of oil.

The density of the sound-absorbing layers in the combiner can range between about 0.1 to 0.5 g / cm2 and

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the fiber diameter should be in the range between approx. 1 to 10 Microns. The porosity of the sound absorbing layers of the wiper can be between 50 and 150 pores per inch

(1 inch = 2.54 mm) and an average density of 12. until

12 g / cm.

The invention is explained in more detail below with reference to exemplary embodiments, from which further important features emerge. It shows:
Fig. 1 is a longitudinal section through a separator according to the

Invention intended for use in a gas turbine engine;
Fig. 2 is a section along the line 2-2 of Fig. 1, the interior of the separator in a partial section Darge? represents is;

3 is a schematic of the gas turbine engine system with the separator is provided according to the invention in the outgoing from the oil pan air exhaust line to the to separate oil trapped in the air.

The separator and silencer according to FIGS. 1 and 2 is cylindrical formed in a housing 15 and has elements C arranged concentrically within the housing 15 Combiner and elements ST of a scraper, where the various arranged cylinders of this

Elements between terminations or caps 1,2

which are closed, with which they are permanently connected / The layers are held by a perforated, winding inner core 3 made of metal, e.g. an arch made of aluminum

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wire, which is cylindrical and a plurality of has relatively large openings 4. The cap 1 is closed, while the cap 2 has a central opening 5, as an inlet for the air soaked with oil in a space 6 in the middle of the arrangement within the metal core 3 serves.

The combiner C is located furthest inward and is held on the metal core 3. The unifier is between

under pressure the core 3 and an outer shell 7 / enclosed. The core 3 and the sheath 7 are square-shaped wire mesh filters made of aluminum wire, with a dimension of 18x14 inches (= 45.7x35.5 cm) and pore openings with a diameter of 0.009 inches (= 0.228 mm), which are corrugated or corrugated. The combiner is designed as a fiber fleece mat 9 made of glass fibers 10 with a diameter of approximately 0.00011 inches (= 0.027 mm). The mat 9 has a thickness of about 1/8 inch (= 3.175 mm) in a single layer between layers 3 and 7. The mat has a density of about 1.5 lbs / ft ³ (= 0.024 g / cm ³ ).

The stripper ST has two layers, made up of layers of foamed Polyurethane sheet 11, 12 with a thickness of 1/8 inch (= 3.175 mm), which has a porosity of 100 pores per inch (= 6.45 cm) and a hole volume of over 90 percent. Since each layer has a thickness of approx. 1/8 inch (= 3.175 mm), the entire scraper has a thickness of 1/4 inch (= 6.35 mm). The foamed Polyuiethanbogen is in juxtaposition closed

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to the outer shell 7 of the combiner C in order to make the assembly as compact as possible.

The arrangement is perforated by an outer sleeve 22 Metal protected. An open-weave cuff 30 of extruded polypropylene is interposed therebetween arranged to allow a free flow of air from the outer surface of the urethane foam to the holes of the perforated Cuff 22 to ensure.

Each of the concentrically arranged cylindrical layers is with the end caps 1, 2 at each end by means of a potting compound 24 connected, whereby a leak-proof seal is produced, which ensures that the into the Center 6 of the arrangement through the opening 5 of the cap 2. passing current through the different layers runs to then exit through the outermost layer 22.

Air enriched with oil enters during operation

a;

the arrangement through the opening 5 of the cap 2 / it is then passed through the metal core 3, enters the combiner C and is passed through the mat 9. During the passage through the mat 9, the collected oil droplets are combined in such a way that they are larger Form droplets that increase in size so that balls of inflowing oil by gravity on the Accumulate bottom of the unifier. A small part of the oil is collected as relatively large drops. As a result

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the relatively large size will be these droplets
caught within the polyurethane foam and combined to form even larger drops, which flow by means of gravity to the bottom of the element and consequently over a lip 21
and through outlets 23 in the cap 2 into an oil pan 25 in the lower part of the housing.

The housing 15 has an oil outlet 26 which leads to an oil line 27 leads, so that the oil collected in an annular space 8 and the oil pan 25 through an outlet 26 via the line 27 can be delivered.

The air is passed through the polyurethane foam layer 11, 11, which is now essentially free of oil droplets, but which contains oil in vapor form. This air exits through the outer sleeves 21 and 30 and then through an outlet 28 of the housing and is conducted via an air line to the inlet of the engine so that the vaporous oil can be burned. For example, one cannot
The gas turbine engine shown, the air are fed to the compressor and then the combustion chamber.

Of course, the caps 1, 2 are provided with the necessary accessories so that they can be inserted into the air line. These lines are known and
do not form part of the present invention.

In addition to using the manner previously described

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the separator according to the invention can be used for this purpose remove oil in the form of mist from the air discharged from air cylinders. The exhaust air from air cylinders usually contains lubricating oil, which is released in the form of a mist, making a significant amount of noise. The fog-shaped oil can be separated and the noise level can be reduced by 30 dbA or more if the Separator according to the invention is used.

A separator with additional components for soundproofing can easily be modified by modifying the FIGS 2 can be obtained. For this it is only necessary to have additional sound-absorbing layers, for example Layers of nylon paper, another glass fiber mat, a paper layer, additional polyurethane sheets and to provide a layer of fabric.

The arrangement can also be used in connection with a lubrication system can be used, in which the lubricant is sprayed into the bearings as a finely divided mist of oil containing air will. With this system, the released air can be cleaned of the oil contained in mist form before it is released into the outside air without the risk of contamination. The collected oil can be sent to the spray mist generator be returned for reuse.

The separator can be built using materials that are insensitive to corrosive liquids

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or gases are and can also be used to add airborne droplets of corrosive acids remove, such as foggy hydrogen chloride, which occurs in the production of chlorine, foggy Sulfuric acid, which occurs in the manufacture of sulfuric acid and the like.

The separator of the invention is particularly useful for Application in gas turbine engines, its low differential pressures during operation enable that the assembly is located in close proximity to the engine.

The separator according to the invention, shown schematically in FIG. 3, is in the air line extending from the oil pan arranged. The source of air is the air leaking from the engine through leaks in the oil seals, the oil in mist and vapor form as it passes through the

the

Tub flows. By / arrangement of the separator according to the invention in the air line emanating from the oil pan, can the fog-shaped oil separated from the air, v / ground.

The separator separates 90 to 99 percent of the liquid

liquid form of existing oil. The remaining / oil along with the oil, which is in vapor form, can lead to the engine ring be where it's burned. Alternatively, it can also be released into the air. If the latter alternative is chosen, it may be desirable to cool the air before reaching the separator in order to keep its oil content in Reduce vapor form, since when pouring off hot air that

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Oil in steam forin contains the steam when cooling to a dense Smoke is changed.

A gas turbine engine 30 (FIG. 3) has an air inlet 31

in the air. with a row 32 of vortex separators 33 to the first clean / air is passed through a compressor 34 to combustion chambers 35, and then flows through a turbine 36 while the exhaust gases are led to an exhaust outlet 37.

a lubricant ,

The engine has an oil pan 38, which is used as a source for / for example Lubricating oil, which is supplied under pressure to the moving parts of the engine, including those not shown Compressor bearings. An air exhaust duct emanating from the tub 39 evacuates the air escaping through leaks in the seals of the main bearings. In this air line

41
39, a separator according to the invention is arranged in series which removes liquid oil from this air, but no oil vapor. The liquid oil thus deposited is collected and returned to the oil pan 38 via a line 42.

It is necessary that the vertical height of the base of the separator with respect to the surface of the fluid Medium in the pan is such that oil pearls at this height reduce the differential pressure prevailing at the separator exceed. If, for example, the differential pressure at the separator under the most unfavorable conditions (with a

Saturation with oil) is 0.5 psi (= 0.035 kgf / cm ² ) and the density of the oil is 0.85 g / ml, the minimum height is 16 inches

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(= 40.6 cm). In many applications it is inconvenient, inefficient or impossible to achieve elevations greater than 16 to inches (= 40.6 to 60.9 cm) as a result the importance of a lower pressure drop through the separator.

A line 43 carries the air containing oil in steam

Via a condenser with a heat exchanger from the separator 41 / to the compressor j54 of the engine, from there to the combustion chamber 35 »so that the oil vapor is burned. This effectively closes off that source of air leaking oil and recovers almost all of the oil in that air for reuse, either as lubricating oil or as fuel. However, if desired, an air vent 44 may be provided in place the line 43, or, as shown, in addition to this.

If desired, a heat exchanger, as shown, can be provided in the return line 43 to carry heat with to exchange incoming air from the air cleaner bank 32, and to cool and condense the oil vapor and to return to a liquid phase for recovery and to prevent oil loss from the Oil supply source occurs when the oil is in a vaporous state is.

The separator according to the invention can be used in a similar manner in oil lines which are shown in FIG

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with compressor or pneumatically "operated air drills or cylinders or other compressed air operated air tanks that are used to lubricate the system

in

must and where the lubricating oil / those used in the device Air can penetrate. The separator is in one

such a case emanating from the air cylinder is arranged in series with the / discharge line, to separate the oil trapped in the air.

It is important that a separator is proposed which is used for separating and recovering liquids from gases, in particular Machine lubricating oil in aerosol form from gas turbine

serves.
Air leakage from engines / If the separator is connected in series with an air extraction line from the gas turbine engine, oil is separated from the air before it is released, with a moderate reduction in noise and only a slightly higher level of back pressure. is exercised on the system.

By increasing the number of selected components of the separator, the sound attenuation can be increased significantly with a minimal increase in the back pressure so that at the same time as the separation, a sound attenuation he follows.

- Claims 5098U / 0709

Claims (12)

Expectations 1. Separator for separating liquids suspended in gases, in particular droplet-shaped oil from gases, for example air, characterized in that one behind the other in a fluid stream a first component of a combiner (C), which is in the form of a nonwoven mat (9) between dimensionally stable porous Cover sheets (3.7) is included in a density in the range between approx. 0.05 and 0.5 g / cm, the fibers being sufficiently long so that they form a cohesive nonwoven mat with a diameter of approx. 0.25 to Form 30 microns, and a second component of the unifier (C) are arranged, which second component is designed as a porous, open-pore polyurethane foam sheet (11, 12) which has a porosity in the range between approx. 50 to 150 pores per inch (= 1 inch = 2.54 mm) and have an average density in the range of approx. 1 to 3 lbs / ft ³ (0.016 to 0.048 g / cm ⁵ ). 2. Separator according to claim 1, characterized in that a scraper (ST) at an angle to the horizontal is arranged so that the combined liquid by means of gravity along the surface of the scraper flows down. 509844/07 0 9 3. Separator according to claim 1, characterized in that that the mat (9) as the first component of the unifier (C) and the arches (11,12) as the second component of the Combiner (C), each designed in a closed form and arranged concentrically one inside the other. 4. Separator according to claim 3, characterized in that the mat (9) is folded in a corrugated shape. 5. Separator according to claim 1, characterized in that the fiber fleece mat (9) consists of glass fibers. 6. Separator according to claim 1, characterized in that additional mats (9) and arches (11,12) as Mufflers are provided, in addition to their union and stripping function, so that the noise level when the fluid medium flows through the elements (9> 11, 12) is reduced. 7. Separator according to claim 6, characterized in that at least one sound-absorbing layer before or is provided behind the nonwoven mat (9) and in front of or behind the arches (11,12), so that an additional Soundproofing is created with every intermediate layer of sound-absorbing material. 8. A separator according to claim 7, characterized in that the sound-absorbing material is paper, more porous 509844/0709 Foam or a non-woven mat is. 9. A separator according to claim 7, characterized in that the density of each sound-absorbing layer of the combiner (C) is in the range between about 0.1 to O} 5 g / cm, that the fiber diameter of the layer is between about 1 to 10 microns that the Poro-. The thickness of the sound-absorbing layers is between approx. 50 to 150 pores per inch (1 inch = 2.54 mm), and that their average density is between approx. 2 to 12 lbs / ft ³ (= 0.03 to 0.19 g / cm ³ ). 10. Gas separation and recovery system. in 'a gas turbine engine, with essentially not just all of it in the gas in the form of droplets floating oil but also the oil remaining in the gas is separated in vapor form before the gas is released into the ambient air, characterized by a gas turbine engine (30), in which in series one behind the other a compressor (34), a combustion chamber further (35) and a turbine (36) are arranged / by a lubricant reservoir (38), which is connected to the engine (30) via .Gas- und Lubricant supply- (42.43) and outlet lines / is connected and has a gas discharge line (39), and through a separator (41), which is arranged in series with the conduit (39), around the liquid oil droplets suspended in the gas to unite and strip off in line (39) and 509844/0709 return the combined liquid oil to the reservoir (38). 11. System according to claim 10, characterized in that the gas discharge line (39) behind the separator (41) is connected to the compressor (34), so that oil vapor emerging from the separator through the Compressor (34) and the turbine (36) arrives and all of the oil vapor contained therein is burned. 12. System according to claim 10, characterized in that the separator (41) is a separator according to a of claims 1 to 6 is. The patent attorney: 509844/0709 Empty