• 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 system for the separation of liquid, in droplet or mist form accompanying substances from a gaseous stream, comprising a housing (1) in which a filter cartridge (5) is arranged, wherein the housing (1) has an inlet (2) and an outlet ( 3) for the material stream, wherein the filter insert (5) has at least two filter layers (7), wherein an interface (8) of the first filter layer (7) is substantially parallel to an interface (8) of the second filter layer (7), wherein at least one interface (8) forms a barrier to the material flow.
    公开号:AT513286A4
    申请号:T50445/2012
    申请日:2012-10-12
    公开日:2014-03-15
    发明作者:
    申请人:Ift Gmbh；
    IPC主号:
    专利说明:

    1 TY10267
    filter system
    The invention relates to a filter system for the separation of liquid, present in droplet or mist form accompanying substances from a gaseous stream, comprising a housing in which a filter cartridge is arranged, wherein the housing has an inlet and an outlet for the material flow.
    The filtration of gaseous streams to remove liquid droplets present in droplet or mist form can take place in different ways. Depending on the requirements and the boundary conditions, different techniques are used.
    For example, known filter systems rely on the principle of centrifugal action to remove higher mass droplets than the gas stream. Another known filter system is based on the principle of electrostatic Wechselwiikung on particles in streams. These are so-called electrostatic precipitators.
    Generic filter systems, as described above, are usually based on filter layers based on fibrous filter media. Because of their high efficiency in terms of the separation of solid or liquid particles from gaseous streams or solid particles from liquid streams, at the same time relatively low system costs, such filter systems are most common. Two different concepts are the most common. In the so-called Oberflächenfiltem very tightly packed filter materials or filter layers are used with very small pores, to avoid excessive pressure loss, the filter layers are made relatively thin layer. This is contrasted by the so-called deep-acting filter systems in which relatively loosely packed fibers are used in correspondingly thick filter layers.
    Surface filters and deep-acting filters are known in many designs and are widely used in the art. However, there are some known issues that have not been resolved yet. A major problem is that in the separation of liquid fractions present in droplet form from gaseous streams, these droplets in the filter layer - especially in a Fasergewirk the filter medium - coagulate to coherent fluid areas and fill the cavities in the filter layers. As a result, these areas become impassable for the gas flow. At present, this problem is avoided by providing correspondingly large filter volumes, which leads to correspondingly high costs or to unacceptably large dimensions for the filter housings. Successful approaches to the derivation of the liquid from the filter medium or the filter cartridge are so far barely known. The discharge of the fluids from the filter cartridge is very difficult especially if the filter layers are packed very tight and if the liquid is a rel. has high viscosity. 2 TY10267
    To achieve a sufficiently high filter life, which is the maximum operating time to reach an upper limit for the pressure loss is understood, is therefore currently resorting to large-volume filter cartridges.
    According to the prior art, multi-stage (usually two-stage) filter systems are used very frequently and with good success for the separation of viscous liquids entrained in finely divided droplets, the first stage consisting of a relatively coarse-meshed filter medium with large cavities and a relatively large volume large layer thickness, which eliminates the prefilter especially the larger droplets from the gas stream. The second stage or the subsequent layers have a very fine-meshed structure, on which the small and smallest droplets are deposited and although usually has a small layer thickness but a large surface area. To achieve large surfaces of these fine filter layers are usually folded and used in so-called Faltenbalgkörben in the filter housing. From these fine filter layers viscous liquids are very difficult to be discharged again. Since the liquid content in these layers increases steadily over the period of use of the filter and thus obstructs the gas flow more and more, these filter stages must be replaced as soon as a maximum allowable pressure loss is achieved.
    The object of the present invention is therefore to provide a filter system in which the disadvantages described are reduced. In particular, a compact filter system is to be provided, which has a possibly infinite or at least compared to the prior art significantly longer filter life. At the same time, of course, the deposition rate should not be reduced.
    This object is achieved by a filter system for the separation of liquid, in droplet or mist form accompanying substances from a gaseous stream comprising a housing in which a filter cartridge is arranged, wherein the housing has an inlet and an outlet for the substance Ström, which characterized in that the filter insert has at least two filter layers, wherein an interface of the first filter layer is substantially parallel to an interface of the second filter layer, wherein at least one interface forms a barrier to the material flow. In other words, at least one interface forms a separation surface for the material flow. Surprisingly, it has been found that in such an embodiment of the filter system and optionally corresponding filter media finely dispersive viscous liquid fractions can be eliminated from gaseous streams with extremely high deposition rates, both the construction cost and the specific pressure loss reach a minimum and at the same time a significantly extended filter life is possible.
    It is preferably provided that the filter layers are arranged in the housing such that a material stream entering through the inlet enters into the filter layers in an end face and flows through the filter insert. The orientation of the filter layers in the housing is such that the material flow is substantially parallel to the boundary surfaces. 3 TY10267
    The filter effect and service life of the filter system according to the invention increases preferably in that the filter layers have fiber filaments, wherein the fiber filaments have at least 40%, preferably 45% -55% of the total summed fiber lengths in the direction of the material flow. This means that in this embodiment, the fiber filaments are at least 40%, preferably 45% -55% of the total accumulated fiber lengths substantially parallel to the interface of the filter layer. Preferably, the flow direction is substantially horizontal or the orientation of the interfaces is substantially horizontal.
    In a preferred embodiment variant, it is provided that the filter insert forms a stack of individual filter layers which are preferably packed free of space, wherein the filter layers have a planar shape and the interfaces between the filter layers are many times larger than the end faces, preferably more than 10 times, through which the material flow enters and exits, and wherein the flow direction of the material flow is substantially parallel to the boundary surfaces of the filter layers.
    The filter element is bounded and held by the housing. Preferably, the filter layers comprise a pulp. For example, the liners may comprise individual nonwoven fabric layers. The filter insert preferably comprises at least four filter layers. The filter layers can e.g. from a conventional fiber nonwoven material, which is usually traded in the form of roll packages on the market. These can be cut according to the filter insert geometry and pressed in stacked form against each other and limited by the limitations of the filter cartridge housing.
    It has proved to be advantageous if the ratio of the thickness D to the length L of the individual filter layers is at least 10, preferably at least 20, particularly preferably 30 to 50.
    The length L corresponds essentially to the path length of the material flow through the filter layers. Preferably, the filter insert is designed such that the distance traveled by the gaseous stream in filter element, which may have, for example, several separate, possibly different, filter layers, traveled distance (= filter depth) at least 50 mm, preferably 150 to 200 mm.
    The filter performance could be increased in one embodiment by the filter layers are arranged at least partially offset on the inlet side for the material flow and / or on the outlet side for the material flow. Preferably, the filter layers are alternately layered arranged layered, so that there is a tooth profile, it is advantageous if the offset between 50 and 150% of the thickness of the respective filter layer.
    With this measure, the inlet and outlet surface for the material flow can be increased. This makes it possible to reduce the inlet pressure resistance and to favor the outflow of aggregated liquid at the exit surface. 4 TY10267
    It has also been found by the inventors that it is advantageous if drainage elements are inserted between the individual filter layers. The drainage elements absorb the liquid accompanying substances and thus convey them out of the filter layers. In one embodiment, the drainage elements are layered and arranged between filter layers. As a result, the material flow is divided into individual Filteiiagen and the partial flows grazing of intermediate layers of drainage elements limited Preferably, the distance between two adjacent drainage intermediate layers between 5 and 15 mm, but preferably between 5 and 10 mm. In another embodiment, the drainage elements are used in individual filter layers. The drainage elements may then be e.g. be cylindrical, cubic, cuboid, etc. formed. Both concepts can also be combined.
    The drainage elements are e.g. from a medium which exerts an attractive (e.g., hydrophilic or oleophilic) effect on the liquid (s) to be deposited. The outer surfaces of the drainage elements can be fine-meshed and the interior coarse-meshed. Also, vertical channels may be present, in which the attracted liquid flows.
    It has proven to be advantageous if drainage channels are embedded in the filter layers, which lead out of the filter insert.
    This makes it possible that the separated liquid from the filter insert or more precisely led out of the filter layers wild, by the liquid is passed in the drainage channels to a drainage bed located outside the filter layer.
    Further advantages and details are described below with reference to figures.
    Fig. 1 shows a filter system according to the prior art.
    FIGS. 2 to 5 show three embodiments for filter systems according to the invention.
    In Fig. 1 is a view through a two-stage filter system according to the prior art. The filter system for the separation of liquid, present in droplet or mist form accompanying substances from a gaseous stream, comprising a housing 1, in which a filter insert 5, 6 is arranged. The material stream to be filtered, which is composed of a gas stream with accompanying substances, is symbolically represented by an arrow. This material stream enters the filter system at inlet 2. Subsequently, the material flow enters the filter insert 5, 6, this being formed from a prefilter 5 and a fine filter 6. In the pre-filter 5, the deposition of the larger droplets, a fraction which usually includes a significant mass fraction of the liquid takes place. The fine filter 6, which often consists of folded, thin-layered filter papers, serves to filter the finer droplets. The material flow penetrates the fine filter medium transversely, and exits at the outlet 3 TY10267 again from the Filterytem. Through a drain 6 collected liquid can be discharged from the housing 1.
    Unlike the filter system of the prior art shown in Fig. 1, the concept of depth filtration in the examples of Figs. 2 to 5 according to the invention is improved insofar as a specially optimized and designed filter cartridge in a particular way Housing 1 is inserted.
    Fig. 2 is analogous to the filter system of FIG. 1, the filter insert 5 is inserted into the housing 1, wherein the filter element 5 consists of a stack of several filter layers 7 in the form of nonwoven layers with fiber filaments. The filter system is used for the separation of liquid, present in droplet or mist form accompanying substances from a gaseous stream, and includes next to the housing 1 and the filter insert 5 disposed therein, an inlet 2 and an outlet 3 for the material flow (also symbolic with an arrow is shown). The filter insert 5 is arranged between inlet 2 and outlet 3. Furthermore, the filter insert 5 has a plurality of filter layers 7. The boundary surface 8 of the first filter layer is substantially parallel to an interface 8 of the second filter layer, which in turn is parallel to the third filter layer 7, etc. The filter layers 7 are arranged in the housing 1 such that a material flow entering through the inlet 2 end faces into the filter layers 7 enters and flows through the filter cartridge 5. The material stream then runs essentially parallel to the boundary surfaces 8. Of two adjacent boundary surfaces 8, at least one, preferably both are impermeable to the material flow, that is to say that they form a barrier to the material flow. The filter insert 5 is formed by a stack of preferably seamlessly packed, individual filter layers 7, wherein the flow direction of the material flow is substantially parallel to the boundary surfaces 8 of the filter layers 7.
    The boundary surfaces 8 are aligned substantially parallel to the flow direction of the material flow. The material flow to be filtered, which reaches the filter housing 1 via the inlet 2, enters the filter insert 1 at the entry-side (end-face) end faces 9 of the filter layers 7, which in the present case are nonwoven layers, and flows parallel to the boundary surfaces 8 the filter layers 7, which are also parting surfaces of the filter layers 7, to the outlet soapy end surfaces 10. There, the filtered material flow exits from the filter element 5 and leaves through the outlet 3, the housing first
    The filter layers 7 have fiber filaments. The orientation of the fiber filaments of the filter layers 7 or nonwoven fabric layers are more than 40 of the sum of the fiber lengths parallel to the surface of the nonwoven layers or to the interface 8 between individual nonwoven layers. This can be accomplished well by the fact that the fiber directions of nonwovens, in particular thin-layer nonwovens due to their production, are predominantly aligned with the surface of the nonwovens.
    Through targeted procedures, this proportion can be further increased without much effort. Of these parallel aligned fiber lengths, without special treatment, about half in the flow direction and the other half perpendicular thereto. According to the invention, however, TY10267 is proposed to provide an anisotropic fiber orientation, wherein the proportion of fiber lengths pointing in the flow direction is about 30% higher than the proportion of the fiber lengths pointing perpendicular to the flow direction (and thus in the direction of gravity).
    The installation position of the filter layers 7 in the housing 1 takes place in such a way that the filter layers 7 (more or less) are horizontal. Thus, two very advantageous effects are achieved: Due to the very large proportion of fiber lengths aligned parallel to the flow direction of the material flow, the flow of material is impeded to a greatly reduced extent in the flow, which greatly reduces the pressure drop through the filter medium. At the same time, the likewise very large proportion of vertically aligned fiber lengths favors the outflow of the separated liquid downwards. For the deposition rate of the liquid particles essentially only the entire specific surface of the fiber material is crucial, not the orientation of the fibers themselves.
    FIG. 3 shows an alternative embodiment which corresponds to the structure of the example of FIG. 2, so that (as in the following examples of FIGS. 4 and 5) reference may be made to the previous description of the figures, insofar as the components are identical, in contrast to FIG Example of Fig. 2 or in extension here 7 flat drainage elements 11 are introduced here at the interfaces 8 and separating surfaces of the filter layers. These have the function to suck the fluid fractions deposited in the filter materials and to take them up and out of the stack of filter layers 7.
    In order to optimally ensure this function, these drainage elements 11 exist at the interface with the filter layers, e.g. from a fine-mesh, liquid-attracting material, as well as in the interior of coarse-mesh fabric or vertical channels with auseichend large cavity cross-section.
    The installation position of the consisting of Vliessammelelementen stack filter element 5 is carried out as in the example of FIG. 2 in such a way that the Vliestrennflächen and thus the collecting elements are aligned perpendicular (to the horizontal). The material flow also flows through the inlet 2 here again at the inlet-side (end-face) end faces 9 of the filter layers 7 in the filter insert, flows along the boundary surfaces of the filter layers 7 to the outlet-side end faces 10 and exits the housing 1 through the outlet 3 ,
    In Fig. 4, a modification of the design of the drainage elements 12 is shown. The drainage elements 12 are here not flat between the boundary surfaces 8 and separation planes of the filter layers 7, but in the form of vertically oriented, cylindrical bodies, which are used in interruptions of the filter layers 7. Again, the outer layer of these drainage elements 12 consists of fine-meshed or fine-pored Flüssigkeitsanziehendem material, while inside the material coarse-pored or kanalformig is designed with sufficient void.
    Quiet! ΤΥ10267
    Finally, FIG. 5 shows a variant with staggered layer-sequence packs. The nonwoven fabric layers or filter layers 7 are arranged stacked on the inlet side 9 and on the outlet side 10 in each case offset by the distance 14. The distances 14 can be chosen differently on the inlet side 9 and on the outlet side 10; it is also possible, with reduced efficiency, to provide only the inlet side 9 or only the outlet side 10 with a tooth profile. In this case, it has proven to be very favorable to adjust the spacings so that they assume a value between 50 and 150% of the thickness 13 of the nonwoven fabric layer 13.
    In summary, the advantage of the presented problem solution is to realize ideal conditions for the flow of both the material stream to be filtered and the liquid to be conducted out of the filter insert. Extensive testing and measurements have confirmed the effectiveness of the proposed measures.
    Thus, it is possible to significantly increase the performance of filter systems for the separation of liquid droplets present in droplet form from gaseous streams, while reducing construction costs. A significant advantage is in particular to combine extremely high deposition rates with unlimited filter life.
    权利要求:
    Claims (9)
    [1]


    TY10267

    8th

    1. Filter system for the separation of liquid, in droplet or mist form accompanying substances from a gaseous stream, comprising a housing (1) in which a filter cartridge (5) is arranged, wherein the housing (1) has an inlet (2) and an outlet (3) for the flow of material, characterized in that the filter insert (5) has at least two filter layers (7), wherein an interface (8) of the first filter layer (7) substantially parallel to an interface (8) of the second Filter layer (7), wherein at least one interface (8) forms a barrier to the material flow.
    [2]
    2. Filter system according to claim 1, characterized in that the filter layers (7) are arranged in such a manner in the housing (1) that a flow of material entering through the inlet (2) enters the filter layers (7) and through the filter insert (5). flows.
    [3]
    3. Filter system according to claim 1 or claim 2, characterized by at least five substantially parallel, adjacent filter layers (7).
    [4]
    4. Filter system according to one of claims 1 to 3, characterized in that the filter insert (5) forms a stack of preferably substantially gap-free, individual filter layers (7), wherein the flow direction of the material flow substantially parallel to the boundary surfaces (8). the filter layers (7).
    [5]
    5. Filter system according to one of claims 1 to 4, characterized in that the ratio of the thickness D to the length L of the individual filter layers (7), at least 10, preferably at least 20, more preferably 30 to 50.
    [6]
    6. Filter system according to one of claims 1 to 5, characterized in that the filter layers (7) have fiber filaments, wherein the orientation of the fiber filaments (7) is such that at least 40%, preferably 45 - 55% of the summed lengths of the fiber filaments in Point flow direction.
    [7]
    7. Filter system according to one of claims 1 to 6, characterized in that the filter layers (7) have fiber filaments, wherein the orientation of the fiber filaments is such that only a maximum of 20% of the summed fiber lengths are aligned perpendicular to the material flow direction and horizontal to the surface.
    [8]
    8. Fdtersystem according to one of claims 1 to 7, characterized in that the filter layers (7) on the inlet side (9) and / or on the outlet side (10) of the filter layers (7) are arranged alternately offset for the material flow, so that itself gives a tooth profile, wherein the distance of the offset corresponds to a value between 50 and 150% of the thickness of the respective filter layer (7)



    9 TY10267
    [9]
    9. Filter system according to one of claims 1 to 8, characterized in that between the individual filter layers (7) drainage elements (12) are used and / or that in the filter layers (7) drainage channels (11) are embedded, which lead out of the filter insert ,
    类似技术:
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    同族专利:
    公开号 | 公开日
    AT513286B1|2014-03-15|
    DE102013111149A1|2014-04-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4124360A|1975-07-07|1978-11-07|Finite Filter Co., Inc.|Coalescing demister|
    DE3225073A1|1981-07-06|1983-01-20|Cigarette Components Ltd., London|Tobacco smoke filter|
    DE10233182A1|2001-12-21|2003-07-03|Caterpillar Inc|Integration of an air separation membrane and a collection filter for use in an air intake system of an engine|
    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|CN105597431A|2014-09-15|2016-05-25|Ge延巴赫两合无限公司|Filter|
    AT516310B1|2014-09-15|2016-06-15|Ge Jenbacher Gmbh & Co Og|filter cartridge|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50445/2012A|AT513286B1|2012-10-12|2012-10-12|filter system|ATA50445/2012A| AT513286B1|2012-10-12|2012-10-12|filter system|
    DE201310111149| DE102013111149A1|2012-10-12|2013-10-09|Two-stage filter system for separating liquid present in droplet or mist from gaseous material, has two filter layers whose boundary surfaces are arranged parallel to each other, such that barrier for material flow is formed|
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