IES87358Y1 - Filter element for separating oil vapor from a gas flow - Google Patents

Abstract

A filter element for separating an oil vapour from a gas flow, the filter element (9) comprising: - a tubular outer screen (10) that is permeable to the gas flow; and - a tubular outer screen (13) that is permeable to the gas flow, the outer screen and the inner screen being contained on both ends in, on the one hand, a first end cap (16) and, on the other hand, a second end cap (17) such that an intermediate space (18) between the outer screen (10) and the inner screen (13) is sealed off to the gas flow on the first end cap (16) and the second end cap (17), the first end cap (16) and/or the second end cap (17) comprising an opening (19) for placing an environment of the filter element (9) in fluidic contact with an internal space (20) that is contained by the inner screen (13),characterised in that the intermediate space (18) is filled with a packed bed of oil vapour-sorbing granules (21), each individually having an effective granule diameter of between 0.001 mm and 1.5 mm.

Description

r9 0&0 (bk 'L'L "fl 'L'L 9,09 690 9,09 '99 6‘9 '99 FILTER ELEMENT FOR SEPARATING OIL VAPOR FROM A GAS FLOW.

The present utility model relates to a filter element and a filter device for separating oil vapor from a gas flow.

In this context, "oil vapor" means a carbonaceous component or a group of carbonaceous components having a carbon number of 6 to 16.

The present utility mogef relates more specificallygma filter element comprisiggfl - a tubular outer screen that is permeable to the gas flow; - a tubular inner screen that is permeable to the gas flow in an interior space delimited by an inner surface of the outer screen, an intermediate space between the outer screen and the inner screen being filled with a packed bed of oil vapor-sorbing granules, nearly all of the oil vapor- sorbing granules having an effective granule diameter of between 0.001 mm and 1.5 mm.

In this context, "effective granule diameter" means a diameter of a spherical particle having a volume equivalent to a volume of an oil vapor-sorbing granule.

Cylindrical filter elements for separating an oil vapor from a gas flow are already known in the prior art that are completely filled with an oil vapor-sorbing bed, a characteristic diameter of such a cylindrical filter element being smaller than a characteristic length of said cylindrical filter element and the gas flow flowing through the oil vapor-sorbing bed in an axial direction of the cylindrical r7, '9' r751’ 609% gap" 609% rs" ’9‘ filter element.

The oil vapor-sorbing bed typically comprises granules of an oil vapor-sorbing material, such as activated carbon. These granules can be regular in shape, 'L'L "fl 'L'L 9,99 690 9,99 '99 6‘9 '99 for example spherical or rod-shaped, or irregular in shape. Characteristic dimensions of such granules typically vary between 0.5 mm and 5.0 mm.

The smaller the characteristic diameter of such a cylindrical filter element, the higher a flow rate of the gas flow through the oil vapor-sorbing bed.

This flow rate results in a high pressure drop across the oil vapor-sorbing bed, typically between 50 mbar and 1000 mbar, and a limitation in the sorbent capacity of the oil vapgrflsorbing bed. we» page '5‘ "3 05‘ To avoid this high pressure drop and limitation in the sorbent capacity, the flow rate through the oil vapor-sorbing bed must therefore be limited to a value of typically 1.5 m/s.

Increasing the characteristic diameter of the filter element is usually not possible due to space limitations imposed by a filter housing around the filter element.

Reducing a flow rateggafimhe gas flow that is appligéfio a filter device having gag filter element is also not possible because said flow rate is often imposed due to devices through which the gas flow flows upstream of the filter device.

Distributing the flow rate of the gas flow over additional filter elements connected in parallel in the filter device would imply an additional cost for filter elements and pipes and thus an additional installation cost.

GB 1,096,989 describes a cylindrical adsorption unit for separating oil vapor from a gas flow consisting of an inner screen and outer screen placed concentrically with reggrea to one another andfigntained between two efififl caps, the space between the inner screen, the outer screen and the end caps being filled by a porous adsorbent material such as activated alumina or activated carbon. '1’ '9 'L'L 9,99 690 9319 '99 6‘9 '99 The gas flow flows through perforations in the outer screen, through the porous adsorbent material in a radial manner with respect to the adsorption unit, and finally through perforations in the inner screen away from the porous adsorbent material.

The radial flow of the gas flow through the porous adsorbent material reduces the flow rate of the gas flow through the porous adsorbent material in relation have to flow axially through the porous absorbent material. to an adsorption unit having the same dimensionsflowherein the gas flow WOHQW As a result, a pressure drop across the porous adsorbent material will be significantly lower than in the case of a large absorption unit with axial flow of the gas flow.

Unfortunately, the relevant adsorption unit is characterized by a limited adsorption capacity, as stated on page 3, lines 49-51 in GB 1,096,989. separating 90% to 95% of the oil vapor from the gas flow on a molar basis.

To avoid the high pressure drop across an oil vapor-sorbing bed through which the gas flow axially flows, woven or non-woven filter media have been developed that are impregnated with oil vapor-sorbing particles, as described for example in US 3,149,023 or GB 1,265,098.

Said woven or non-woven filter media are typically wrapped in a cylindrical shape to produce a filter medium through which the gas flow radially flows.

'L ’L 'L 67' :9 67' 960’ [Welt 960’ The disadvantage of such filter media is, however, that a total amount of oil vapor-sorbing material, which is directly proportional to an amount of oil vapor that can be removed from the gas flow, is much smaller than in an oil vapor- 'L'L "fl 'L'L 9,99 690 9,99 '99 6‘9 '99 sorbing bed having the same dimensions because only a small fraction of said filter media is taken up by oil vapor-sorbing material.

Furthermore, said wrapped filter media impregnated with oil vapor-sorbing bed particles are sensitive to damage, such as cracks, when overloaded. This damage can form a bypass for the gas flow around the still intact filter medium, along which the gas flow can leave the filter element without sufficient separation of oil vapor.

GB 2,109,268 describes a filter element having ""2 filter medium through which a gas flow radially flows, the filter medium consisting of a combination of an inner tubular bed of packed activated carbon granules, around which a folded paper medium impregnated with activated carbon particles is wrapped.

However, the use of such a combination results in a complex layered structure and consequently complex installation of the filter medium in the filter element.

In this case, there is also the disadvantage that the folded paper medium impregnated with agtiWated carbon particles isgagensitive to damage when? overloaded.

The present utility model aims at solving at least one of the said and/or other disadvantages.

For this purpose, the utility model relates to a filter element for separating an oil vapor from a gas flow, the filter element comprising: - a tubular outer screé’fpig that is permeable to thefigs flow; and rs - a tubular inner screen that is permeable to the gas flow in an interior space delimited by an inner surface of the outer screen; 'L'L "fl 'L'L 9,09 690 9,09 '99 6‘9 '99 the outer screen and the inner screen being contained on both ends in, on the one hand, a first end cap and, on the other hand, a second end cap such that an intermediate space between the outer screen and the inner screen is sealed off to the gas flow on the first end cap and the second end cap, the first end cap and/or the second end cap comprising an opening for placing an environment of the filter element in f|uidic contact with an internal space that is contained by the inner screen, with the characteristic that the aforementioned intermediate space is filled with a packed bed of oil vapor- sorbing granules, neaglwall of the oil vapor-sorbingagranules individually haviflgfi an effective granule diameter of between 0.001 mm and 1.5 mm.

In this context, "filled" means that the intermediate space is almost completely filled with the packed bed, such that for a gas flow through the intermediate space there is no bypass in the intermediate space around the packed bed.

In this context, "oil vapor-sorbing granules" can mean both oil vapor-absorbing granules and oil vapor-adsorbing granules.

In this context, thegxwwgrding "nearly all of thgfigil vapor-sorbing granule? individually" means that all of the oil vapor-sorbing granules are considered individually. In other words, nearly all of the oil vapor-sorbing granules individually have a possibly different effective granule diameter of between 0.001 mm and 1.5 mm.

Such a filter element according to the utility model has the advantage that a pressure drop across the filter element is lower and a sorbent capacity is higher than for filter elements already known of the same dimensions that are completely filled with oil vapor-sorbing granules and would be axially flowed through by the gas floi‘iavgrfL ’L ’L :9 67' $096" 630’ In this case, it is very surprising that the saturation time and consequently the lifetime of the filter element according to the present utility model can also be 'L'L "fl 'L'L 9,09 690 9319 '99 6‘9 '99 higher than in a filter element already known that is completely filled with oil vapor-sorbing granules.

For the filter element according to the utility model, the sorbent capacity of the filter element is also higher than for filter elements already known of the same dimensions that would be radially flowed through by the gas flow and provided with a woven or non-woven wrapped filter medium impregnated with oil vapor- sorbing particles.

In this case, it is veryfisurprising that the pressurefidrop across the filter elemgnt according to the present utility model can also be lower than in a filter element already known that is radially flowed through by the gas flow and provided with a woven or non-woven wrapped filter medium impregnated with oil vapor- sorbing particles.

In comparison with filter elements having a woven or non-woven wrapped filter medium impregnated with oil vapor-sorbing particles, the packed bed of oil vapor-sorbing granules is also not sensitive to cracks. spew way anew Preferably, nearly all of the oil vapor-sorbing granules individually have an effective granule diameter of at least 0.01 mm, preferably at least 0.1 mm.

Preferably, nearly all of the oil vapor-sorbing granules individually have an effective granule diameter of at most 1.0 mm, preferably at most 0.5 mm.

Preferably, more than 90% of the aforementioned granules individually have an effective granule diameter of between 0.1 mm and 0.5 mm. @679 _ 169 _ 1679 Preferably, the aforréfnentioned granules havéaa mean effective granu‘f’e diameter of between 0.15 mm and 0.45 mm.

'L'L "fl 'L'L 9,09 690 9,09 '99 6‘9 '99 Preferably, the aforementioned granules have a surface-to-weight ratio of at least 800 m2/g, preferably at least 900 m2/g, more preferably 1000 m2/g.

The higher the surface-to-weight ratio of the oil vapor-sorbing granules, the higher the sorbent capacity of the filter element.

The aforementioned granules preferably have a bulk density of at least 400 kg/m3, preferably at least 500 kg/m3, more preferably at least 600 kg/m3, even more preferably at leastWOO kg/m3. @6969 we '5‘ "3 05‘ The higher the bulk density of the oil vapor-sorbing granules, the higher the sorbent capacity of the filter element.

In a preferred embodiment of the filter element according to the utility model, the aforementioned granules comprise a carbonaceous porous material of a natural or synthetic origin.

A carbonaceous porous material provides good binding strength with the . ’L ’L n, separated OII vapor. NW NW N The carbonaceous porous material preferably comprises activated carbon.

Activated carbon is available at a low cost in relation to other oil vapor-sorbing materials.

In another preferred embodiment of the filter element according to the utility model, the outer screen and/or the inner screen comprises: - a sintered polymebrf preferably polypropylene having pores that afg configured in such a way that the aforementioned granules cannot pass through the pores; and/or 'L'L "fl 'L'L 9,99 690 9,99 '99 6‘9 '99 - a perforated metal, preferably stainless steel, having perforations that are configured in such a way that the aforementioned granules cannot pass through the perforations.

In another preferred embodiment of the filter element according to the utility model, the outer screen and/or the inner screen comprises an expanded material that is laminated with a structured material, pores in the structured material being configured in such a way that the aforementioned granules cannot pass through $9 pores. we» page '5‘ r9 05‘ In this context, "expanded material" means a plate-shaped material that is cut and stretched in such a way that it forms a grid having a regular perforation pattern.

The advantage of either a sintered polymer and/or a perforated metal or an expanded material is that this makes the outer screen and/or the inner screen more rigid than only a non-woven material that is typically used for the outer screen and/or inner screen in existing filter elements.

Such a typically used non-woven material exhibits some expansion over time and significant deflection under a weight of the packed bed, as a result of which the intermediate space between the inner screen and the outer screen increases in volume. As a result, the intermediate space is no longer completely filled with the packed bed over time, and a bypass can form in the intermediate space around the packed bed between the inner screen and the outer screen. Oil vapor can be carried with the gas flow via such a bypass without being sorbed into the packed bed. m Furthermore, such agtfiimpically used non-woven mgterial is more susceptible"??? damage, such as cracks, than either a sintered polymer and/or a perforated metal or an expanded material such as in the present utility model.

'L'L "fl 'L'L 9,09 690 9,09 '99 6‘9 '99 The structured material is preferably made of glass fibers.

Alternatively, the structured material is preferably a woven or non-woven polymer medium, preferably a polypropylene medium.

In another preferred embodiment of the filter element according to the utility model, the inner screen and the outer screen are axisymmetric and arranged concentrically with respect to each other.

In this case, a perpendicular distance betweenwan inner surface of the oJter screen and an outer surface of the inner screen is preferably at least 5.0 mm, preferably at least 10.0 mm, more preferably at least 20.0 mm, even more preferably at least 30.0 mm, still more preferably 40.0 mm and most preferably at least 50.0 mm.

The greater said perpendicular distance, the more oil vapor-sorbing material the filter element contains and consequently the higher a saturation time of the filter element will be.

The utility model also relates to a filter device for separating an oil vapor from a gas flow, with the characteristic that the filter device is provided with a filter element according to the utility model.

It goes without saying that such a filter device has the same advantages as the above-described embodiments of the filter element according to the utility model.

With a view to better demonstrating the characteristics of the utility model, as an example withoutsxtbagnby restrictive character;~"’6’a®fipreferred embodimentsxf‘insfl described here of a filter element for separating an oil vapor from a gas flow according to the utility model and a filter device provided with such a filter element, with reference to the accompanying drawings, in which: 'L'L "fl 'L'L 9,99 690 9319 '99 6‘9 '99 Fig. 1 is a cross section of a filter device provided with a filter element according to the utility model.

Fig. 1 shows a filter device 1 according to the utility model for separating oil vapor from a gas flow.

This gas flow may be a flow of compressed air, for example, but the utility model is not limited thyeto. you» page '5‘ "3 05‘ The filter device 1 comprises a filter housing 2, which is composed of a lid 3 and a pot 4, which can be mounted on top of each other to form the filter housing 2.

In the example shown, the pot 4 is screwed into the lid 3, both the lid 3 and the pot 4 being provided with a cooperating screw thread 5.

It is not impossible that the pot 4 is, alternatively or additionally, attached in the . ’L ’1, q, lid 3 by means of a bgasybnet mount and/or somefixother way. M The lid 3 is equipped with an inlet 6 for gas to be purified and an outlet 7 for purified gas. Typically, the filter device 1 with its lid 3 is mounted in a machine pipe, such as a compressor installation. For this purpose, the lid 3 at the inlet and the outlet 7 can be provided with flanges suitable thereto.

Furthermore, the lid 3 can be provided with a ventilation opening 8. Such a ventilation opening 8 provides an audible warning signal whenever the pot 4 is disassembled from the lid 3 while the filter housing 2 is internally still under pressure. Thus, the pobtgil can be unscrewed or dfsggssembled completely fro??? the lid 3 in a safe manner, namely only at the time when an internal pressure in the filter housing 2 has been completely vented and has reached the same value as that of a pressure in an external environment of the filter housing 2.

'L'L "fl 'L'L 9399 690 9319 $90 «\0 $99 In the filter housing 2, more specifically in the pot 4, a filter element 9 is fitted.

The filter element 9 is composed of: - a tubular outer screen 10 that is permeable to the gas flow, which outer screen 10 has a first outer screen end 11 and a second outer screen end 12 different from said first outer screen end 11; - a tubular inner screeQ,g13 that is permeable to thggas flow in an interior spagefi delimited by an innergsurface of the outer screen610, the inner screen 13 having a first inner screen end 14 and a second inner screen end 15 different from said first inner screen end 14; - a first end cap 16 in which the first outer screen end 11 and the first inner screen end 14 are contained in such a way that they are sealed with the first end cap 16, and a second end cap 17 in which the second outer screen end 12 and the second inner screen end 15 are contained in such a way that they are sealed with the second end cap 17, such that an intermediate space 18 between the outer screen and the inner screen 13 is sealed off to the gas flow on the first end cap 16 and the second end cap 17, the second end canal"? comprising an opening 19 that Is configured In such a way that an internal space 20 that Is contained by the inner screen 13 and the first end cap 16 is placed in fluidic contact with an environment of the filter element 9 along said opening 19.

Within the scope of the utility model, it is not ruled out that the first end cap 16 is also provided with the opening 19 or only the end cap 16 is provided therewith.

The intermediate space 18 is filled with a packed bed of oil vapor-sorbing granules, nearly all ofi‘the oil vapor-sorbing grandfes 21 individually havingrsan effective granule diameter of between 0.001 mm and 1.5 mm.

'L'L "fl 'L'L 9319 690 9319 3&0 «\0 3&9 Preferably, more than 90% of the granules 21 individually have an effective granule diameter of between 0.1 mm and 0.5 mm.

The granules 21 preferably have a mean effective granule diameter of between 0.15 mm and 0.45 mm.

Furthermore, the granules 21 preferably have a surface-to-weight ratio of at least 800 m2/g. ' '9 19' 6‘79 <9"? 6‘79 \\° 09 \\° The granules 21 preferably have a bulk density of at least 400 kg/m3.

Preferably, but not necessary according to the utility model, the aforementioned granules 21 comprise a carbonaceous porous material of a natural or synthetic origin, preferably activated carbon.

The outer screen 10 and/or the inner screen 13 comprises: - a sintered polymer, preferably polypropylene, having pores that are so small that the granules 21 gatinot pass through the pores: and/or NW - a perforated metal, preferably stainless steel, having perforations that are so small that the granules 21 cannot pass through the perforations.

Alternatively or additionally, the outer screen 10 and/or the inner screen 13 comprises an expanded material that is laminated with a structured material, pores in the structured material being so small that the granules 21 cannot pass through the pores.

The structured material Is preferably made of glass@ fibers or of a woven or non- 'L 069$ woven polymer medItt‘m, preferably a polypropylene medium. no In this case, the inner screen 13 and the outer screen 10 are axisymmetric and arranged concentrically with respect to each other.

'L'L "fl 'L'L 9,09 690 9,09 '99 6‘9 '99 In this case, a perpendicular distance between an inner surface and the outer screen 10 and an outer surface of the inner screen 13 is preferably at least 5.0 vapor/m3 of gas.

Furthermore, the filter device 1 having the filter element 9 is used to separate an oil vapor from a gas flow to an oil vapor concentration of at most 0.010 mg of oil vapor/m3 of gas, preferably at most 0.005 mg of oil vapor/m3 of gas, more preferably at most 0.003 mg of oil vapor/m3 of gas.

Comparative examples: '1? ’9’ '7} 0419 093"? 0630’" ,5" ’5" '5" A one-to-one test is carried out according to ISO standard no. 8573-5 for various filter devices already known with filter media for separating oil vapor in a typical compressor installation having, upstream of the filter device for separating the oil vapor, - an oil-injected compressor for compressing a gas; - a cooling dryer for separating water vapor from the compressed gas; and - a coalescence filter for separating oil aerosols having a carbon number greater than 16.

'L ’L 'L 67' :9 67' 960’ gage" 960’ In this case, the inlet concentration of oil vapor in the gas that enters the filter device for separating oil vapor is kept around a concentration of 0.5 mg of oil vapor/m3 of gas.

'L'L "fl 'L'L 9,99 690 9,99 '99 6‘9 '99 The pressure and temperature of the gas entering the filter device are 7 bar and 0-35°C, respectively.

For the various filter media already known, the pressure drop across the filter device, the initial breakthrough concentration of oil vapor and the time period required to reach a breakthrough of 50% in the relevant filter medium are listed in table 1.

In this context, an "initial breakthrough concentration" means a concentration of oil vapor as initially occurs in the gas coming out of a still unsaturated filter medium.

The lower said initial breakthrough concentration, the higher the initial performance of the filter device.

In this context, a "breakthrough of 50%" means that a concentration of oil vapor that occurs in the gas coming out of the filter medium is 50% of the inlet . . 'L ’L ‘1 concentration of Oil vapbr. Wm 9W '5 "9 '9 From the data in table 1, it is clear that, in wrapped filter media impregnated with oil vapor-sorbing particles, the pressure drop across the filter device is lower in relation to a filter medium that is designed as a fully packed bed.

Furthermore, the wrapped filter media are generally found to have a lower initial breakthrough concentration and in some cases a longer time period for reaching a breakthrough of 50% than a filter medium that is designed as a fully packed bed.

'L ’L 'L 67' :9 67' "(all gage" 960’ From this, it can be concluded that the filter devices having a wrapped filter medium generally have a higher level of performance with respect to pressure drops and initial breakthrough concentration and in some cases even a longer ’ "30% qjL 93¢) '99 r9 9&0 (bk qjL 93¢) '99 saturation time and consequently lifetime than a filter device having a filter medium that is designed as a fully packed bed.

Filter device Type of Pressure Initial Time period filter drop breakthrough for 50% medium [mbar] concentration breakthrough [mg oil [h] vapor/m3] Domnick wrapped 109 0.04 28 Hunter ACS J. 01$ .9 020DBMX w" w" w" Donaldson wrapped 135 0.09 23 Ultra filter DF 0120 Hankison wrapped 23 0.10 4 F06—CF-T FST — wrapped 56 0.14 <1 FST70AM FST — fully 587 0.15 <1 FST70CAM packed bed Atlas Copco wrapped 140 0.14 <1 QD35+ Table 1 at" gel" Example: A test is carried out for the filter device having the filter element according to the utility model under the same conditions as those for the comparative examples described above.

The filter element comprises two concentric cylindrical screens made of sintered polypropylenemthe intermediate space between said screens being";L a "an" rs" filled with a packed bgd of activated carbon partlfiles. ’ (99% (9'19 '19 {9'1} Wm 69’ (99% (9'19 '19 {9'1} Wm L ©qu ,9 . A filter element for separating an oil vapor from a gas flow, the filter element (9) comprising: - a tubular outer screen (10) that is permeable to the gas flow; and - a tubular inner screen (13) that is permeable to the gas flow in an interior space delimited by an inner surface of the outer screen (10); the outer screen (10) and the inner screen (13) being contained on both ends in, on the one haggad, a first end cap (16) andégph the other hand, a secorgplfi end cap (17) such that an intermediate space (618) between the outer screen (10) and the inner screen (13) is sealed off to the gas flow on the first end cap (16) and the second end cap (17), the first end cap (16) and/or the second end cap (17) comprising an opening (19) for placing an environment of the filter element (9) in fluidic contact with an internal space (20) that is contained by the inner screen (13), the aforementioned intermediate space (18) is filled with a packed bed of oil vapor-sorbing granules (21), nearly all of the oil vapor-sorbing granules (21) individually having an effective granule diameter of between 0.001 mmevfimnd 1.5 mm. way @95er 2. The filter element according to claim 1 and one or more ofthe following: nearly all of the oil vapor-sorbing granules (21) individually have an effective granule diameter of at least 0.01 mm, preferably at least 0.1 mm; nearly all of the oil vapor-sorbing granules (21) individually have an effective granule diameter of at most 1.0 mm, preferably at most 0.5 mm; more than 90% of the aforementioned granules (21) individually have an effective granule diameter of between 0.1 mm and 0.5 mm; the aforementioned granules (21) have an average effective granule '7, 609% "5" the aforementioned granules (21) have a surface-to-weight ratio of at least 800 m2/g, preferably at least 900 m2/g, more preferably at least 1000 mZ/g;

Claims (1)

1. (9 96¢) BK rm rt st Claims ro A HS/Vyty6 yV\B7av/y2, v, 3N< , wadhT, 2avKa6 , k, / 113%, 31y HS/Vyty6 y\M3( )ca6 2vdd\k; 5, .33th vagalv/ cvyyw(r rr) 3], 3d 2y\6 y, bty 33 31y k, / 113%; ,\M:| 5, Cgbghvdwyv/cwywm ) 31, 3d 2y\6 y, bty 33 31y k,/ h%dv,w dvB/Wav/2, cy dyhiB dS/d b ,wduNyv/ng cy a731y agav/ cvyyw(r n); 31y agav/ cvyyw(r n) , \Ad 31y dvav/ cvyyw(rl ) byohk cawB dvyd awbaih ymd/ dv, awihy awy h,®w, , W3ywd c, 2 (r ),\Ad\53\aw31y a31yvh, wd, , /yca\éfifl ywd c, 2 (ri ) lgch 31, 3, wow/WE ydd 31/2,cy(:f)by3’/oyyw31y agQv/cvij (rrr) ,wd 31y dvav/cwyw(r| ) d /y, fyd a7733 31y k, / h%aw31y W3ywd c, 2 (r ),\Ad31y/ycawdy\nd c, 2 (ri ), 31yW3ywd c, 2 (r ),\Ad)av31y/ycaw:| ywd c, 2 (ri ) ca6 2\dd\k ,wa2ywd\k (r )7av2h cahk ,wywTdam6 ywBa731y HS/v yry6 ywB( )dv'lfgdjd: cawB c3%dh ,wd\B/\M/, h/2, cy (3n) 3], 3d cawB dvyd b 31y duNyv/cwyw(r| ), characterized in that 31y , 7avy6 ymflawyd dvB/\6 ydd 3/ /2, cy (rf) d “yd %dh , 2, ckyd byd a7ad1T, 2a\5 aybohk kv, \Agfy/ (sr), wy, \ln , Hna731y adh T, 2a\5 a\bd\k kv, mgry/ (sr) (Md'djg, Hn h, TdAk ,wy7/yc3i'y kv, mgry dd 6 y3/v "9"} a7by3yoyywnmm 6 6,69% r a 6 6 o so : hy fits/vyfy6 ywB, ccavdohk 33 ch (6 r ,md awy av6 avy a731y 7a”m%d\k; wy, \h ,Hna731y adhT, 2a\5a\bd\k kv, wgfy/ (sr) dvdd'djg, Hn h, Ty ,w y7/yc3i'y kv, \Agfy dd 6 y3/va7, 3fy, /3mm 6 6 , 2vyK/v, bh ,3fy, l3rm 6 6; wy, \h ,Hna731y adhT, 2a\5a\bd\k kv, wgfy/ (sr) dvdd'djg, Hn h, Ty ,w y7/yc3i'y kv, \Agfy dd 6 y3/va7, 36 a/ 3r cm6 6 , 2vyK/v, bh , 36 a/ 3m 6 6; 6 avy 31, w n% a731y , 7avy6 yvfiiawyd kv, \Agfy/ (sr) dAdd'djg, Hn h, Ty ,wy7/yc3J'y kv, \Agty dd 6 yfilva7by3/oyywmr 6 6 ,wd mi 6 6; 31y, 7avy6 ymfliawyd kv, \Agfy/ (sr) h, Ty, w ,Tyv, ky y7/yc3i'y kv, \Agty dd 6 y3/v a7by3’/oyyWsfitrt 6 6 ,wd mnt 6 6; NW @5696 31y , 7avy6 ymfliawyd kv, \Agfy/ (sr) h, Ty , /gv7, cyflhE/oydzh3m 3a a7, 3 fy, /3frrm6 S)k, 2vyK/v, bh ,3fy, l3 nm65)k, 6 avy 2vyK/v, bh ,3fy, /3rrmm 6 5)k; rf 'L'L "fl 'L'L 9,09 690 9319 '99 6‘9 '99 the aforementioned granules (21) have a bulk density of at least 400 kg/m3, preferably at least 500 kg/m3, more preferably at least 600 kg/m3, even more preferably at least 700 kg/m3; the aforementioned granules (21) comprise a carbonaceous porous material of a natural or synthetic origin; optionally, wherein the carbonaceous porous material comprises activated carbon 3. The filter element according to claim 1 or claim 2, characterized in that the outer screen (10)®band/or the inner screen (19%)»1comprises one or more \Ogffi the following: Fax Fax ,9 - a sintered polymer, preferably polypropylene, having pores that are configured in such a way that the aforementioned granules (21) cannot pass through the pores; and/or- a perforated metal, preferably stainless steel, having perforations that are configured in such a way that the aforementioned granules (21) cannot pass through the perforations; - an expanded material that is laminated with a structured material, pores in the structured material being configured in such a way that the aforementioned granules (21 ) cannot @133 through the pores; optionally, wherein the structuredfi material is made of glass fibers; optionally, wherein the structured material is a woven or non-woven polymer medium; and optionally, wherein, the polymer medium is a polypropylene medium; 4The filter element according to any of preceding claims 1 to 3, characterized in that the inner screen (13) and the outer screen (10) are axisymmetric and arranged concentrically with respect to each other; optionally, wherein a perpendicular distance between an inner surface of the outer screen (10) and an outer surface of the inner screen (13) is at least 5.0 mm, preferably at leas‘tmgr1m00 mm, more preferablfgtleast 20.0 mm, even may???L preferably at least 30.0 mm, still more preferably 40.0 mm and most preferably at least 50.0 mm 19. r9 @659 yak @vfi‘fl @ww wetlpfi ’5 ’5 ’5 5A filter device for separating an oil vapor from a gas flow, characterized in that the filter device (1) is provided with a filter element (9) according to any of preceding claims 1 to 4'1, '9 '19 (on? €999 (JP 3‘9 ”.99 3‘9 '9’ "it '1} 059% 0‘an 0‘39“ (5% ’5“ '5“ r73’ '9' r7, 6'9 all“ 609 c e c ,5\\ \\ ,3'\\ 20 19 12 10 \\\ 15