• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Filter device, for the separation of liquid, present in droplet or mist form accompanying substances from gaseous material, comprising a housing (1) and a filter insert (11) arranged therein, the at least one filter layer (5, 6, 6 ') and a drainage layer ( 7), wherein the filter layer (5) has an inlet surface (5a) and an outlet surface (5b) for the material flow, the drainage layer (7) extending in the flow direction (S) along the underside of the filter layer (5), wherein the inlet surface (5a) of the filter layer (5) is provided with a flow barrier (8) which adjoins the area of the inlet surface (5a) adjacent to the drainage layer (7) up to a total proportion of between 20% and 50% (5a) and the inlet-side end surface (7a) substantially completely covers the drainage layer (7).
    公开号:AT512506A4
    申请号:T503422012
    申请日:2012-08-24
    公开日:2013-09-15
    发明作者:
    申请人:Ift Gmbh；
    IPC主号:
    专利说明:

    1 TY10262
    filtering device
    The invention relates to a filter device for the separation of liquid, in droplet or mist form accompanying substances from gaseous streams, comprising a housing and a filter insert arranged therein, which has at least one filter layer and a drainage layer. Furthermore, the invention relates to a filter cartridge, which has at least one filter layer and a drainage layer.
    The filtration of gaseous streams to remove droplets or mist form liquid fractions can be done in different ways. Depending on the requirements and constraints, various techniques are used. Widely used are filter systems that use filter layers of fiber material, these fiber layers are either packed very densely, but have a small layer thickness or - vice versa - can have a looser filter pack with a larger layer thickness. In the first case, one usually speaks of surface Sperrfiltem in the second case of deep-acting filter systems.
    Filter systems of this type are known in many designs and are widely used in the art. A particular challenge for the elimination of liquids of higher viscosity (compared with, for example, water) from gaseous streams is the service life of the filter cartridges. Especially where the liquid fraction is present in minute droplets (eg with diameters of <0.2 pm) and a very high degree of purity of the gaseous material flow is required, relatively densely packed fiber layers must be used, which in turn form into a coherent viscous liquid Coagulated droplets are very difficult to drain. The consequences are either relatively short service life of the filter insert or the use of large filter surfaces with correspondingly large component dimensions, but both variants are associated with a high cost.
    The proposal of the invention is based on the object of enabling the separation of highly viscous liquid accompanying substances from gaseous material streams with a very high deposition rate while at the same time minimizing the size so that unlimited or at least extremely high filter service lives are achieved.
    This object is achieved by a filter device, for the separation of liquid, in droplet or mist form accompanying substances from gaseous streams, comprising a housing and a filter insert disposed therein, which has at least one filter layer and a drainage layer, characterized in that the filter layer is a second TY10262
    Has inlet surface and an exit surface for the flow of material, wherein the drainage layer extends in Strömungsiichtung along the underside of the filter layer, wherein at the inlet surface of the filter layer, a flow barrier is provided, which is adjacent to the drainage layer region of the entrance surface to a total proportion between 20% and 50% and the inlet-side end face of the drainage layer substantially completely covers.
    The solution according to the invention has a common drainage layer for the existing filter layers, which ensures liquid removal in the respective filter layer. The special design with the flow barriers ensures that the liquid collected in the filter layers is dissipated as well as possible. At the same time prevents a first poorly filtered part of the gaseous stream passes through the coarse-pore drainage medium to the filter outlet opening.
    It is preferably provided that the filter insert has at least two filter layers, wherein each of the two filter layers have an inlet surface and an outlet surface for the material flow, wherein the exit surface of the first filter layer adjacent to the inlet surface of the second filter layer and wherein the drainage layer along the underside of at least two filter layers extending, wherein at the inlet surface of the first filter layer, a first flow barrier and at the inlet surface of the second Filteiiage a second flow barrier is provided, which partially cover the respective inlet surface and which cover the adjacent to the drainage layer region of the inlet surfaces wherein these two Strömungsbameren until extend to the drainage layer.
    In this case, it is particularly preferred that substantially no distance exists between adjacent filter layers, so that the flow damper between two filter layers rests substantially free of space on the entry surface of one filter layer and on the exit surface of the other filter layer.
    In one embodiment, it is provided that a flow barrier is arranged on the exit surface of the filter insert, which covers a part of the exit-side end face of the drainage layer and a part of the exit surface of the filter insert, so that the upper region of the exit-side end face of the drainage layer up to a proportion between 20 and 50% of the entire end face and the lower, adjacent to the drainage layer part of the exit surface of the filter cartridge in a proportion up to max. 10% is covered. Thus, the last filter layer and the drainage layer are each partially covered. This prevents that the last filter layer is "bypassed" by a part of the material flow, as it enters the drainage layer. 3 TY10262
    In the materials used according to the invention for the filter layers are preferably porous materials in question, which have a certain packing density. It is particularly preferably provided that the first filter layer in the flow direction has a lower packing density than the second filter layer. One speaks then of a pre-filter (with the smaller packing density) and a fine filter (with the larger packing density).
    The filter insert, through which the material flow to be filtered is passed, thus preferably has at least two different filter layers, which have an increasing packing density and / or a decreasing pore size in the flow direction of the material flow.
    In one embodiment, it can be provided that the drainage layer has a stronger adhesion to the liquid to be separated than the filter layer (s). The drainage layer may then exert an attractive effect on the deposited liquid (e.g., oleophilic for the separation of oils).
    It is preferably provided that the filter layer (s) have pores. In one embodiment, it can be provided that at least two filter layers are present, wherein the former in the flow direction filter layer has a lower packing density, a smaller thickness or a lower packing density and smaller thickness than the later in the flow direction filter layer.
    The drainage layer may be noted that it may have pores for the discharge of the separated liquid from the filter layers, in which case the average pore diameter is greater than that of the overlying filter layers which are provided for the fine filtration.
    Particularly good filter performance is achieved when the thickness of the drainage layer in relation to the total thickness (d) of the filter layers is in the range between 1:15 and 2:15.
    The ends of the drainage layer are preferably flush with the boundary surfaces of the filter layers.
    In a preferred embodiment, it is provided that the flow barriers at the upstream end of the drainage layer cover 15 to 50% of the filter inlet surface, wherein in the presence of multiple flow barriers, the downstream maximum may have the same size as the preceding upstream flow barrier. Preferably, the first flow band covers between 35% and 50% of the entrance surface, the second flow barrier between 25% and 35% of the entrance surface, and a third flow barrier between 15% and 20% of the entrance surface. 4 TY10262
    In addition to the flow barriers at the inlet surfaces of the filter layers and at the inlet side end face of the drainage layer, a flow barrier layer may be provided on the outlet side of the filter element which covers part of the exit-side end face of the drainage layer and a small part of the outlet side of the filter layer provided for the fine filtration. Namely, the area facing downward and upward from the interface between the drainage layer and the fine filter layer. It is preferably provided that through this flow barrier between 20 and 50% of the total exit-side end face of the drainage layer and tnax. 10% of the total exit area of the fine filter stage (filter layer) are covered.
    It may be noted with regard to the flow barriers that they are preferably arranged between the different filter layers in the lower region of the interfaces between the filter layers for the gas flow impermeable (or poorly penetrating), extend to the drainage layer and cover at least 15% of the filter surface.
    The invention further relates to a filter insert having at least one filter layer and a drainage layer, characterized in that the filter layer has an inlet surface and an outlet surface for the material flow, wherein the drainage layer extends in the flow direction along the underside of the filter layer, wherein at the inlet surface of the filter layer a flow barrier is provided which partially covers the entry surface and which covers the region of the entry surface adjoining the drainage layer. All other details of this filter insert and all other features are the same as those mentioned above, so it can be referenced.
    Based on embodiments shown in figures, the operation of the invention and further advantages and details are explained in detail.
    Fig. 1 shows schematically a first embodiment of a filter device according to the invention in cross section
    2 schematically shows the material flow to be filtered in the embodiment of FIG. 1 FIG. 3 shows schematically a filter insert, FIG.
    Fig. 4 shows schematically a second embodiment of a filter device according to the invention in cross section
    Fig. 5 shows schematically a third embodiment of a filter device according to the invention in cross section
    Fig. 1 shows in cross-section schematically a filter device according to the proposed concept, wherein the basic structure of individual filter layers corresponds to the prior art 5 TY10262. FIG. 2 shows the filter device according to FIG. 1 in its intended use, while FIG. 3 shows the filter insert 11 for the filter device of FIG. The three figures are therefore explained together below. Shown here is a filter device for the separation of liquid, present in droplet or mist form accompanying substances from gaseous streams. The filter device comprises a housing 1, which has an inlet opening 2 and an outlet opening 3. The gaseous material stream to be filtered first enters into the inlet opening 2, is filtered in the filter insert 11 and exits again at the outlet opening 3. Inside the housing, filtered liquids are collected. For the derivation of the separated liquid fraction from the filter housing a drain 4 is provided. In the embodiment shown, the filter insert 11 has two spring supports 5, 6. Both filter layers are made of porous material and have a different porosity. As materials, for example, nonwovens, filter papers, etc. may be mentioned. The first filter layer 5 has a coarser porosity than the second filter layer 6. Also, the thickness in the flow seal S in the first filter layer 5 is less than in the second filter layer 6. As a result, the larger liquid particles are filtered in the first filter layer 5, the second filter layer 6 then still filters the very fine liquid particles. Therefore, one speaks of a pre-filter stage for the first filter layer 5 and a fine filter stage for the second filter layer 6.
    The prefilter stage is used for coarse or pre-separation of the liquid fraction (s) from the ariommenden gas stream. Here, the larger droplets are eliminated from the gas stream Accordingly, the structure of the filter medium is coarse-pored or packed accordingly loose, so that the relatively large amounts of liquid in the larger Dropletspektmm relatively large amounts of liquid can be removed well. The task of the fine filter stage is the elimination of the present in small and smallest droplets liquid fraction from the gas stream. In contrast to the pre-filter stage, the filter media for fine filtration are very fine-pored with relatively tightly packed fiber filaments. The respective depth of the pre- and fine filter stages is different and naturally depends on which substances are to be filtered.
    In the respective filter layer 5, 6, the liquid particles are then collected, which aggregate into larger droplets. When a certain droplet size is reached, these begin to flow downwards within the respective filter layer 5, 6, where they are collected in the drainage layer 7 (and optionally discharged via the drain 5). In the second filter layer 6, the fine filter, owing to the fine-poredness and the relatively high packing density, the coagulated liquid, especially if it is a more viscous liquid, can flow out again only to a very limited extent. For this reason, it is advantageous to direct the liquid deposited in the prefilter out of the housing 1, without the fine filter 5 thereby suffering an additional oil supply. In some applications known in the prior art, this problem is addressed by arranging a (possibly additional) discharge opening for the liquid on the prefilter side of the housing.
    A feature of the proposed solution is that a common for the first filter layer 5 (the prefilter 5) and the second filter layer 6 (the fine filter 6) drainage layer 7 is provided on the underside of the filter element 11, in which the filter layers 5, 6 drained liquid is collected and conveyed by the pressure drop across the filter cartridge 11 to the drain 4 at the downstream lower end of the housing 1. This drainage layer 7 preferably consists of a porous or gobporigen material, for example a relatively coarsely fibrous nonwoven, which in contrast to the material of the fine filter 6 and optionally also prefilter 5 preferably has an attraction for the separated liquid, so that the liquid is attracted by adhesive surface forces or . Is sucked out of the filter layers 5,6.
    According to the invention, a plurality of flow barriers 8, 9, 12 are now provided, specifically a first (outer) flow barrier 8 and a second (inner) flow barrier 9 and a final flow dam 12, which are represented by thickenings in the figures and which also serve as flow guide surfaces , The flow barriers 8, 9 are arranged in the upstream inlet region of the drainage layer 7. FIG. 1 shows the flow barriers 8, 9 on the basis of a filter insert 11 with two filter layers 5, 6. The outer flow barrier 8 blocks the inflow of the material flow to be filtered (see also arrows in FIG. 2) onto the lower region of the prefilter stage 5 and thus prevents part of the material flow from the prefilter 5 from reaching the drainage layer 7, which has only a deficient filter effect having. The outer inlet-side flow barrier 8 covers the inlet surface 5a of the first filter layer 5 partially and the inlet-side end surface 7a of the drainage layer 7 completely. The covered area of the entrance surface 5 a, which is covered by the outer flow barrier 8, is preferably about 35-50% of the complete entrance surface 5 a, wherein the cover of the entrance surface 5 a begins at the drainage layer 7. The outer flow barrier 8 is a gas-tight cover for the material flow to be filtered. The flow barrier 12 covers about 20-50% of the exit-side end face 7b of the drainage layer 7, the lower part of this end face 7b being kept free for the discharge of the separated liquid.
    The inner flow barrier 9 blocks the lower part of the entry surface to the fine filter 6, so too short flow paths through the fine filter 6 are also prevented. Thus, that relatively small proportion of the material stream to be filtered, which passes through the area between the flow banks 8, 9 to the drainage layer 7, has to travel a relatively long distance through the prefilter 5. Due to the very long distance from the 7 TY10262
    Entry of the material flow in the filter layer 5 to the exit from the filter layer 5, flows through this channel forming pressure loss due only a very low mass flow, which also experiences a very good deposition rate even by the large filter depth effect in the pre-filter 5. The covered area of the entrance surface 6a, which is covered by the inner flow barrier 9, is preferably about 25-35% of the complete entrance surface 6a, wherein the covering of the entry surface 6a on the drainage layer 7 begins. The inner flow barrier 9 is likewise a gas-tight cover for the material flow to be filtered.
    Fig. 2 shows schematically the gas flow through a two-stage filter cartridge 11 according to the proposed concept by means of arrows. Due to the large path length at flow through the area covered by the flow barriers 9,10, the gas flow is restricted or relatively low, as indicated by the arrow lengths qualitatively. The retained and accumulated in the filter layers 5, 6 liquid can flow freely to the drainage layer 7 and is supported by the pressure drop across the flow path. The drainage layer 7 fills with the liquid until the saturation density is exceeded and a state of equilibrium is reached, so that the amount flowing into the drainage layer 7 is identical to that leaving it end-to-end on the downstream side surface.
    3 shows a cross section through a two-stage planar or prismatic filter insert 11. The flow direction of the stream is indicated by arrows and runs on the illustration from left to right.
    Fig. 4 shows a filter device with a filter insert 11, the three layers 5, 6, 6 'has. The other components which are no longer explicitly described correspond to the components of the preceding figures, so that a renewed description is dispensed with and reference may be made to the description of the figures relating to FIGS. 1 to 3. In addition to the three filter layers 5, 6, 6 ', this embodiment also differs from the preceding one in that a third flow barrier 10 is provided. At the entrance to the first filter layer 5, the entire lower entrance surface 5a is covered up to a height of about 35-50% of the total area and sealed gas-tight by the outer flow barrier S. At the transition from the first filter layer 5 to the second filter layer 6, the inner flow barrier 9 is arranged, which covers about 25-35% of the lower entrance surface for the second filter stage and extends to the drainage layer 7. Similarly, at the transition from the second filter layer 6 to the third filter layer 6 ', the third flow barrier 10 is arranged, which in turn has a preferably reduced height in comparison to the inner flow barrier 9. This covers only about 15 - 20% of the entrance surface 10a of the third filter layer 10. 8 TY10262
    In an analogous manner, filter inserts 11 with further filter layers and corresponding flow barriers are also provided within the scope of the invention. In principle, the proposed concept is also applicable to a single-stage filter system, but in this case only one flow barrier, namely that at the inlet and one at the outlet of the filter stage would be present.
    The flow barriers are usefully made of impenetrable or difficult to penetrate thin layers, for example of films for the gaseous stream.
    As an alternative to the cuboidal construction is shown in Fig. 6 nor a filter cartridge in the cylinder (shell) form shown. In this case, a cylindrical two-stage filter element 11 with two filter layers 5, 6 according to the proposed concept is shown in analogy to FIGS. 1 to 3. The other components are analogous to the previous descriptions.
    In all cases, the basic principle is the same: The material flow enters the pre-filter 5, which is closed by the flow barrier 8 at the bottom. Between prefilter 5 and fine filter 6, the inner flow barrier 9 is arranged, which, starting from the drainage layer 7 covers about 20-30% of the lower inlet surface 6a of the fine filter 6. At the exit surface of the filter cartridge is the final flow barrier 12.
    The proposed concept is intended for filter devices which, as stated at the outset, eliminate liquid impurities from gaseous streams, but do not exhaust themselves. For this purpose, the accumulated liquid must be well drained from the filter cartridge. This problem is very well met by the proposed solution according to the invention, as extensive experiments and measurements have shown. In addition to the basic design, the filter performance depends on the structural design as well as the selection and coordination of the structure and the nature of the components of. However, this can be left to the person skilled in the art, especially as such materials, as usual for filter devices, find use. It has proven to be particularly advantageous to use for the drainage layer 7 a medium which exerts an attractive effect on the liquid and whose average pore size is in a certain ratio to the viscosity of the liquid. In this case, a mean pore size of the medium from which the drainage layer 7 exists is particularly advantageous with the viscosity of the liquid being the condition:
    Mean pore size [mm] x Viscosity of deposited liquid [cSt] = 0.3 - 15 met.
    权利要求:
    Claims (10)
    [1]
    Filter device for separating liquid droplets present in droplet or mist form from gaseous streams, comprising a housing (1) and a filter insert (11) arranged therein, the at least one filter layer (5, 6, 6 ') and a drainage layer (7), characterized in that the filter layer (5) has an inlet surface (5 a) and an outlet surface (5b) for the material flow, wherein the drainage layer (7) in the flow direction (S) along the underside of the Filter layer (5), wherein at the inlet surface (5a) of the filter layer (5) a flow barrier (8) is provided which the the drainage layer (7) adjacent region of the entrance surface (5a) up to a total proportion between 20% and 50 % (5a) and the inlet-side end face (7a) of the drainage layer (7) substantially completely covers.
    [2]
    2. Filter device according to claim 1, characterized in that the filter insert (11) has at least two filter layers (5, 6, 6 '), wherein each of the two filter layers has an entry surface (5a, 6a, 6a') and an exit surface (5b, 6b, 6b ') for the material stream, the exit surface (5b) of the first filter layer (5) adjoining the exit surface (6a) of the second filter layer (6), and wherein the drainage layer (7) extends along the underside of the at least two filter layers (5,6), wherein at the exit surface (5a) of the first filter layer (5) a first Strömungsbamere (8) and at the inlet surface (6a) of the second filter layer (6) a second Strömungsbamere (9) is provided which the partially cover the respective entry surface (5a, 6a) and which cover the region of the entry surfaces (5a, 6a) adjoining the drainage layer (7), wherein both flow barriers (8, 9, 10) extend to the drainage layer (7).
    [3]
    3. Filter device according to claim 1 or claim 2, characterized in that on the outlet surface (5b) of the filter insert a Strömungsbamere (12) is arranged, which forms a part of the outlet-side end face (7b) drainage layer (7) and a part of the exit surface of the filter insert (6b) covers, so that the upper portion of the exit-side end face (7b) of the drainage layer (7) up to a proportion between 20 and 50% of the entire end face (7b) and the lower, adjacent to the drainage layer (7) part of Outlet surface of the filter insert (6b) in a proportion up to max. 10% is covered.
    [4]
    4. Filter device according to one of claims 1 to 3, characterized in that the drainage layer (7) has a stronger adhesion to the liquid to be separated than the Filteriage (s) (5,6). 10 TY10262
    [5]
    5. Filter device according to one of claims 1 to 4, characterized in that the filter layer (s) (5,6, 6 ') have pores, wherein preferably at least two filter layers (5,6, 6') are present, wherein the in Flow direction earlier Fdterlage (5) has a lower packing density, a smaller thickness or a lower packing density and smaller thickness than the later in the flow direction filter layer (6, 6 ').
    [6]
    6. Filter device according to claim 5, characterized in that the drainage layer (7) for the discharge of the separated liquid from the filter layers (5, 6, 6 ') has pores, wherein the average pore diameter is greater than that of the overlying filter layer (s) (6,6 '), which are intended for fine filtering.
    [7]
    7. Ritereinrichtung according to one of claims 1 to 6, characterized in that the thickness of the drainage layer (7) in relation to the total thickness (d) of the filter layers (5, 6, 6 ') in the range between 1:15 and 2:15 lies.
    [8]
    8. Filter device according to one of claims 1 to 7, characterized in that the ends of the drainage layer (7) are flush with the boundary surfaces of the filter layers (5, 6, 6 ").
    [9]
    9. Filter device according to one of claims 1 to 8, characterized in that the flow barrier (s) (8, 9, 10) at the upstream end of the drainage layer (7) 15 to 50% of the filter inlet surface (5a, 6a, 6a ') in the presence of a plurality of flow barriers (8, 9, 10) the downstream maximum may be the same size as the preceding upstream flow barrier (8, 9, 10).
    [10]
    10. Filter insert (11), the at least one filter layer (5, 6, 6 ') and a drainage layer (7), characterized in that the filter layer (5) has an inlet surface (5a) and an outlet surface (5b) for the material flow , wherein the drainage layer (7) extends in the flow direction (S) along the underside of the filter layer (5), wherein on the inlet surface (5a) of the filter layer (5) a flow barrier (8) is provided which partially surrounds the inlet surface (5a) covers and which the the drainage layer (7) adjacent area of the entrance surface (5 a) covers.
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    同族专利:
    公开号 | 公开日
    EP2700438A1|2014-02-26|
    AT512506B1|2013-09-15|
    EP2700438B1|2015-05-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4601731A|1985-07-02|1986-07-22|Koch Engineering Company, Inc.|Chevron-type mist eliminator and method|
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    DE202005004151U1|2005-03-15|2006-07-27|Keller Lufttechnik Gmbh + Co. Kg|Demister filter to remove lubricant or coolant droplets from air has polymer mesh incorporating ionization wires|AT14696U1|2014-09-15|2016-04-15|Ge Jenbacher Gmbh & Co Og|filter|
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    DE19645666A1|1996-11-06|1998-05-07|Mann & Hummel Filter|Filter insert|
    DE10239408A1|2002-08-28|2004-03-11|Robert Bosch Gmbh|Device for separating liquid from a gas stream|
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    US8632616B2|2009-09-08|2014-01-21|Mecs, Inc.|Fiber bed assembly for a fiber bed mist eliminator|JP6519862B2|2015-05-11|2019-05-29|Smc株式会社|Pneumatic filter and filter element|
    法律状态:
    2020-04-15| MM01| Lapse because of not paying annual fees|Effective date: 20190824 |
    优先权:
    申请号 | 申请日 | 专利标题
    AT503422012A|AT512506B1|2012-08-24|2012-08-24|filtering device|AT503422012A| AT512506B1|2012-08-24|2012-08-24|filtering device|
    EP13181435.2A| EP2700438B1|2012-08-24|2013-08-23|Filter device|
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