EP3265208A1 - Filter element for filtering a gas flow, and spray dyer comprising said filter - Google Patents

Filter element for filtering a gas flow, and spray dyer comprising said filter

Info

Publication number
EP3265208A1
EP3265208A1 EP16707721.3A EP16707721A EP3265208A1 EP 3265208 A1 EP3265208 A1 EP 3265208A1 EP 16707721 A EP16707721 A EP 16707721A EP 3265208 A1 EP3265208 A1 EP 3265208A1
Authority
EP
European Patent Office
Prior art keywords
screen
outer mesh
filter element
elastic element
filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP16707721.3A
Other languages
German (de)
French (fr)
Inventor
Martin Martell
Joost TOEBAK
Robert CRUIJFF
Oege CASTELEIN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tetra Laval Holdings and Finance SA filed Critical Tetra Laval Holdings and Finance SA
Publication of EP3265208A1 publication Critical patent/EP3265208A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B01D46/0005—Mounting of filtering elements within casings, housings or frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2273/20—High temperature filtration

Definitions

  • the present invention relates generally to a filter element for filtering a gas flow for use in food processing equipment, such as food spray dryer equipment. More particularly, the present invention relates to a filter element as defined in the introductory parts of claim 1 . The invention also relates to a spray dryer.
  • a process of spray drying is sometimes used for powderising liquid food as e.g. milk products.
  • liquid food When handling food it is naturally always important to have a clean environment so that bacteria and/or unwanted and possibly hazardous materials are not accidentally included in the food.
  • a liquid food is converted into a spray by a nozzle placed at the inlet in a drying container.
  • the spray is dried by hot air supplied into the container. To avoid unwanted particles and substances being incorporated in the food by the hot air, the hot air is filtered before being allowed to heat the food spray.
  • a filter element for filtering a gas flow comprises a frame element, a first outer mesh, and an elastic element biasing said first outer mesh to said frame element.
  • the filtering element is characterised in that it further comprises a first screen which is interposed between the first outer mesh and the elastic element.
  • the first screen covers the area of the first outer mesh through which the gas flow travels.
  • the inventive new screen will improve the filtering of the gas flowing through the filtering element by catching any potential unwanted particles following the gas flow into the filtering element. Due to the design of the filtering element, the screen, as well as other exchangeable components of the same, will be easy to remove and clean or replace.
  • the filter element may further comprise a second outer mesh, wherein the elastic element biases the second outer mesh to the frame element.
  • the frame element may encloses the elastic element and the first outer mesh and the second outer mesh, wherein the first outer mesh and the second outer mesh are arranged on opposing sides of the elastic element.
  • the first screen may cover at least a portion of the area of the second outer mesh through which the gas flow travels.
  • the first screen may extend around the elastic element such that a double fold of the first screen is arranged between the elastic element and the second outer mesh, and an open end of the first screen is arranged between the first outer mesh and the elastic element.
  • the open end of the first screen may in fact be arranged between the first screen itself and the elastic element.
  • the filter element may further comprise a second screen interposed between the elastic element and the second outer mesh, wherein the second screen covers the area of the second outer mesh through which the gas flow travels.
  • the second screen will enhance the filtering efficiency of the filtering element even further.
  • the second screen may also extend around the elastic element such that a double fold of second screen is arranged between the first outer mesh and the elastic element, and an open end of said second screen is arranged between the elastic element and the second outer mesh.
  • the open end of the second screen may be arranged between the elastic element and the second screen itself.
  • the filtering efficiency of the filter element may be even further controlled and enhanced.
  • That screen may extend completely around the elastic element and at least partly overlap itself. Also this design will allow a user or any service personnel to monitor the status of the filtering element at any time. If the screen overlap is visible, the components of the filter element can be assumed to be in place.
  • the first outer mesh and the second outer mesh, said first screen and said second screen, and said elastic element may be made of stainless steel.
  • the filtering element will be extremely heat resistance and may thus be used in connection with high temperatures.
  • the filter element may be provided with a marking, for example, on the first outer mesh and/or on the second outer mesh.
  • the marking may be used when monitoring the status of the components of the filter element.
  • the marking could, for example, be viewed in relation to the first screen and/or the second screen in order to determine the current status of the same.
  • a spray dryer is provided.
  • the spray dyer comprises a filter element according to the features above.
  • mesh used throughout the application should be understood as a rigid gas permeable area as e.g. a grid, a rigid net, a grill, a lattice, a grating, bars, a trellis etc.
  • Fig. 1 is a perspective view of a food spray dryer for making food powder.
  • Fig. 2 is a cross sectional view of a filter element according to one embodiment of the present invention having a first screen unfolded.
  • Fig. 3 is a cross sectional view of a filter element according to another embodiment of the present invention having a first screen folded double at the frame element.
  • Fig. 4 is a cross sectional view of a filter element according to yet another embodiment of the present invention having a first screen and a second screen.
  • Fig. 5 is a cross sectional view of a filter element according to yet another embodiment of the present invention having a first screen and a second screen where both screens are folded double at the frame element as the screen in Fig. 3.
  • Fig. 6 is a cross sectional view of a filter element according to yet another embodiment of the present invention having a first screen wrapped around the entire elastic element so that it has an overlap with itself.
  • Fig. 7 is a perspective view of a filter element according to yet another embodiment of the present invention.
  • Fig. 1 is a schematic view of a food spray dryer 9 for making food powder.
  • the liquid food e.g. milk
  • the liquid food is lead from a liquid food container 10 via a conduit 1 1 to a dryer container 12.
  • the liquid food is converted from liquid into a spray by a nozzle 13 near the inlet to the dryer container 12.
  • Hot air is blown through a filter element 1 into the dryer container 12 where the hot air will evaporate the water in the liquid food leaving only a powder to fall to the bottom of the dryer container 12.
  • the powder exits via the powder conduit 14 for further processing and packing.
  • the filter element 1 is shown in greater detail in the cross sectional view of Fig. 2.
  • the filter element 1 comprises a frame element 2, a first outer mesh 3 and a second outer mesh 4.
  • the frame element 2, the first outer mesh 3 and the second outer mesh 4 are biased by an elastic element 5, i.e. the elastic element 5 presses the first outer mesh 3 towards one side of the frame element 2 and the second outer mesh 4 towards the opposing side of the frame element 2.
  • the elastic element 5 is made of a resilient structure that is heat resistant, e.g. knitted stainless steel.
  • a first screen 6 is interposed between the first outer mesh 3 and the elastic element 5 on the air distribution side of the filter element 1 so that the first screen 6 is being clamped between the frame element 2 and the elastic element 5.
  • the first screen 6 has the purpose of filtering the hot air travelling through the filter element 1 capturing particles present in the air flow and is made of woven stainless steel durable at elevated air temperatures of several hundred degrees Celsius.
  • the first screen 6 is preferably woven by a stainless steel wire with a thickness in the interval of 50-70 micrometers, preferably of 63 micrometers.
  • Fig. 3 is a cross sectional view of the filter element 1 according to another embodiment of the present invention where the first screen 6 is folded double so that the end of the double folded first screen 6 ends visibly between the second outer mesh 4 and the elastic element 5 on the incoming air side.
  • Fig. 4 is a cross sectional view of the filter element 1 according to yet another embodiment of the present invention having a first screen 6 and a second screen 7.
  • the first screen 6 is placed as in Fig. 2, i.e. the first screen 6 is interposed between the first outer mesh 3 and the elastic element 5 on the air distribution side of the filter element 1 .
  • the first screen 6 is thus being clamped between the frame element 2 and the elastic element 5.
  • a second screen 7 is further placed on the opposite side of the filtering element 1 , i.e. the second screen 7 is interposed between the second mesh 4 and the elastic element 5 on the incoming air side of the filter element 1 .
  • the second screen 7 is thus also being clamped between the frame element 2 and the elastic element 5, but on the opposing side of the filter element 1 .
  • the second screen 7 is preferably woven by a stainless steel wire with a thickness in the interval of 120-180 micrometers, preferably of 150 micrometers, to capture the bigger particles already at the incoming air side.
  • Fig. 3 is further provided the second screen 7, folded in the same manner as the first screen element 6, but in an inverted manner compared to the first screen 6 and placed on the opposing side of the filter element 1 .
  • Fig. 6 is a cross sectional view of a filter element 1 according to yet another embodiment of the present invention comprising the first screen 6 wrapped around the entire elastic element 5 so that it will overlap with itself, thereby covering all of area of the first outer mesh 3 and the second outer mesh 4 through which air is travelling during use of the filter element 1 .
  • the overlap is placed so that it is visible at visible inspection of the filter.
  • This embodiment may be modified by using only one of the first outer mesh 3 and the second outer mesh 4. The overlap should then be placed so that it is clamped under the remaingin outer mesh.
  • Fig. 7 is a perspective view of the filter element 1 to illustrate that in at least one embodiment of the invention, the frame element 2 will surround all of the edges of the inner parts or layers of the filter element 1 . It is thereby understood that the folding and overlaps discussed in regard to Figs. 2-6 also are valid in a second dimension of the plane of the filter element 1 not visible in the cross-sectional views of Figs. 2-6.
  • the plane of the filter element 1 being a plane perpendicular to the travelling direction of the gas flow.

Landscapes

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

Abstract

The invention relates to a filter element (1) for filtering a gas flow. The filter element (1) comprises a frame element (2), a first outer mesh (3), and an elastic element (5) biasing said first outer mesh (3) to said frame element (2). The filtering element (1) is characterised in that it further comprises a first screen (6) which is interposed between the first outer mesh (3) and the elastic element (5). The first screen (6)covers the area of the first outer mesh (3) through which the gas flow travels. The invention further relates to a spray dryer (9).

Description

FILTER ELEMENT FOR FILTERING A GAS FLOW, AND SPRAY DYER
COMPRISING SAID FILTER
Technical field
The present invention relates generally to a filter element for filtering a gas flow for use in food processing equipment, such as food spray dryer equipment. More particularly, the present invention relates to a filter element as defined in the introductory parts of claim 1 . The invention also relates to a spray dryer.
Background art
In food processing a process of spray drying is sometimes used for powderising liquid food as e.g. milk products. When handling food it is naturally always important to have a clean environment so that bacteria and/or unwanted and possibly hazardous materials are not accidentally included in the food. In the spray drying process a liquid food is converted into a spray by a nozzle placed at the inlet in a drying container. The spray is dried by hot air supplied into the container. To avoid unwanted particles and substances being incorporated in the food by the hot air, the hot air is filtered before being allowed to heat the food spray.
Traditionally a knitted stainless steel filter has been used, similar to what is used as a filter in a kitchen cooker hood. However, it has been discovered that such a filter in some environments is not quite as effective as required.
Thus, there is a need for an improved filter for the inlet air of spray dryer that reduces the risk of particles in the hot air entering into a food spray dryer.
Summary of the invention
It is an object of the present invention to improve the current state of the art, to solve the above problems, and to provide an improved filter element, especially for use in connection with a spray dryer. These and other objects are achieved by a filter element for filtering a gas flow. The filter element comprises a frame element, a first outer mesh, and an elastic element biasing said first outer mesh to said frame element. The filtering element is characterised in that it further comprises a first screen which is interposed between the first outer mesh and the elastic element. The first screen covers the area of the first outer mesh through which the gas flow travels. The inventive new screen will improve the filtering of the gas flowing through the filtering element by catching any potential unwanted particles following the gas flow into the filtering element. Due to the design of the filtering element, the screen, as well as other exchangeable components of the same, will be easy to remove and clean or replace.
The filter element may further comprise a second outer mesh, wherein the elastic element biases the second outer mesh to the frame element. In addition, the frame element may encloses the elastic element and the first outer mesh and the second outer mesh, wherein the first outer mesh and the second outer mesh are arranged on opposing sides of the elastic element. Such a construction will contribute to an overall stable filter element which also is easy to mount and dismount during maintenance of the like.
The first screen may cover at least a portion of the area of the second outer mesh through which the gas flow travels. Here, the first screen may extend around the elastic element such that a double fold of the first screen is arranged between the elastic element and the second outer mesh, and an open end of the first screen is arranged between the first outer mesh and the elastic element. In a preferred embodiment, the open end of the first screen may in fact be arranged between the first screen itself and the elastic element. The design described above will allow a user or any service personnel to monitor the status of the filtering element at any time. If the double fold and the open end are visible, when viewed from the second outer mesh in the travelling direction of the gas flow, the components of the filter element are in place.
The filter element may further comprise a second screen interposed between the elastic element and the second outer mesh, wherein the second screen covers the area of the second outer mesh through which the gas flow travels. The second screen will enhance the filtering efficiency of the filtering element even further.
The second screen may also extend around the elastic element such that a double fold of second screen is arranged between the first outer mesh and the elastic element, and an open end of said second screen is arranged between the elastic element and the second outer mesh. In a preferred embodiment, the open end of the second screen may be arranged between the elastic element and the second screen itself. The design described above will allow a user or any service personnel to monitor the status of the filtering element at any time. If the double fold and the open end are visible, when viewed from the first outer mesh against the travelling direction of the gas flow, the components of the filter element are in place.
In one preferred embodiment, wherein the first screen may be woven using a wire thickness of 63 micrometers, and the second screen may be woven using a wire thickness of 150 micrometers, as a standard. By providing a first screen and a second screen having different thicknesses, the filtering efficiency of the filter element may be even further controlled and enhanced.
When only one screen is used in the filtering element, that screen may extend completely around the elastic element and at least partly overlap itself. Also this design will allow a user or any service personnel to monitor the status of the filtering element at any time. If the screen overlap is visible, the components of the filter element can be assumed to be in place.
The first outer mesh and the second outer mesh, said first screen and said second screen, and said elastic element may be made of stainless steel. When all of the components are made of stainless steel, the filtering element will be extremely heat resistance and may thus be used in connection with high temperatures.
The filter element may be provided with a marking, for example, on the first outer mesh and/or on the second outer mesh. The marking may be used when monitoring the status of the components of the filter element. The marking could, for example, be viewed in relation to the first screen and/or the second screen in order to determine the current status of the same. According to a second aspect of the invention, a spray dryer is provided. The spray dyer comprises a filter element according to the features above.
The term mesh used throughout the application should be understood as a rigid gas permeable area as e.g. a grid, a rigid net, a grill, a lattice, a grating, bars, a trellis etc.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [element, device, component, means, step, etc.]" are to be interpreted openly as referring to at least one instance of said element, device, component, means, step, etc., unless explicitly stated otherwise.
Brief description of the drawings
The above objects, as well as additional objects, features and advantages of the present invention, will be more fully appreciated by reference to the following illustrative and non-limiting detailed description of preferred embodiments of the present invention, when taken in conjunction with the accompanying drawings, wherein:
Fig. 1 is a perspective view of a food spray dryer for making food powder.
Fig. 2 is a cross sectional view of a filter element according to one embodiment of the present invention having a first screen unfolded.
Fig. 3 is a cross sectional view of a filter element according to another embodiment of the present invention having a first screen folded double at the frame element.
Fig. 4 is a cross sectional view of a filter element according to yet another embodiment of the present invention having a first screen and a second screen.
Fig. 5 is a cross sectional view of a filter element according to yet another embodiment of the present invention having a first screen and a second screen where both screens are folded double at the frame element as the screen in Fig. 3.
Fig. 6 is a cross sectional view of a filter element according to yet another embodiment of the present invention having a first screen wrapped around the entire elastic element so that it has an overlap with itself.
Fig. 7 is a perspective view of a filter element according to yet another embodiment of the present invention.
Detailed description of preferred embodiments of the invention
Fig. 1 is a schematic view of a food spray dryer 9 for making food powder. The liquid food, e.g. milk, is lead from a liquid food container 10 via a conduit 1 1 to a dryer container 12. The liquid food is converted from liquid into a spray by a nozzle 13 near the inlet to the dryer container 12. Hot air is blown through a filter element 1 into the dryer container 12 where the hot air will evaporate the water in the liquid food leaving only a powder to fall to the bottom of the dryer container 12. The powder exits via the powder conduit 14 for further processing and packing.
The filter element 1 is shown in greater detail in the cross sectional view of Fig. 2. The filter element 1 comprises a frame element 2, a first outer mesh 3 and a second outer mesh 4. The frame element 2, the first outer mesh 3 and the second outer mesh 4 are biased by an elastic element 5, i.e. the elastic element 5 presses the first outer mesh 3 towards one side of the frame element 2 and the second outer mesh 4 towards the opposing side of the frame element 2. The elastic element 5 is made of a resilient structure that is heat resistant, e.g. knitted stainless steel.
A first screen 6 is interposed between the first outer mesh 3 and the elastic element 5 on the air distribution side of the filter element 1 so that the first screen 6 is being clamped between the frame element 2 and the elastic element 5. The first screen 6 has the purpose of filtering the hot air travelling through the filter element 1 capturing particles present in the air flow and is made of woven stainless steel durable at elevated air temperatures of several hundred degrees Celsius. The first screen 6 is preferably woven by a stainless steel wire with a thickness in the interval of 50-70 micrometers, preferably of 63 micrometers.
Fig. 3 is a cross sectional view of the filter element 1 according to another embodiment of the present invention where the first screen 6 is folded double so that the end of the double folded first screen 6 ends visibly between the second outer mesh 4 and the elastic element 5 on the incoming air side. The open end of the first screen 6, that is folded back, ends on the air distribution side of the filter element 1 between the first screen 6 itself and the elastic element 5. Also the open end of the first screen 6 will thereby be visible through the filter element 1 .
Fig. 4 is a cross sectional view of the filter element 1 according to yet another embodiment of the present invention having a first screen 6 and a second screen 7. The first screen 6 is placed as in Fig. 2, i.e. the first screen 6 is interposed between the first outer mesh 3 and the elastic element 5 on the air distribution side of the filter element 1 . The first screen 6 is thus being clamped between the frame element 2 and the elastic element 5. In this embodiment, a second screen 7 is further placed on the opposite side of the filtering element 1 , i.e. the second screen 7 is interposed between the second mesh 4 and the elastic element 5 on the incoming air side of the filter element 1 . The second screen 7 is thus also being clamped between the frame element 2 and the elastic element 5, but on the opposing side of the filter element 1 . The second screen 7 is preferably woven by a stainless steel wire with a thickness in the interval of 120-180 micrometers, preferably of 150 micrometers, to capture the bigger particles already at the incoming air side.
In Fig. 5 the filter element according to the embodiment disclosed in
Fig. 3 is further provided the second screen 7, folded in the same manner as the first screen element 6, but in an inverted manner compared to the first screen 6 and placed on the opposing side of the filter element 1 .
Fig. 6 is a cross sectional view of a filter element 1 according to yet another embodiment of the present invention comprising the first screen 6 wrapped around the entire elastic element 5 so that it will overlap with itself, thereby covering all of area of the first outer mesh 3 and the second outer mesh 4 through which air is travelling during use of the filter element 1 . The overlap is placed so that it is visible at visible inspection of the filter. This embodiment may be modified by using only one of the first outer mesh 3 and the second outer mesh 4. The overlap should then be placed so that it is clamped under the remaingin outer mesh.
Fig. 7 is a perspective view of the filter element 1 to illustrate that in at least one embodiment of the invention, the frame element 2 will surround all of the edges of the inner parts or layers of the filter element 1 . It is thereby understood that the folding and overlaps discussed in regard to Figs. 2-6 also are valid in a second dimension of the plane of the filter element 1 not visible in the cross-sectional views of Figs. 2-6. The plane of the filter element 1 being a plane perpendicular to the travelling direction of the gas flow.
It is understood that other variations in the present invention are contemplated and in some instances, some features of the invention can be employed without a corresponding use of other features. Accordingly, it is appropriate that the appended claims be construed broadly in a manner consistent with the scope of the invention.

Claims

1 . Filter element (1 ) for filtering a gas flow, said filter element (1 ) comprising
a frame element (2),
a first outer mesh (3), and
an elastic element (5) biasing said first outer mesh (3) to said frame element (2),
characterised in that said filter element (1 ) further comprises a first screen (6) which is interposed between said first outer mesh (3) and said elastic element (5), said first screen (6) covering the area of said first outer mesh (3) through which said gas flow travels.
2. Filter element (1 ) according to claim 1 , further comprising a second outer mesh (4), wherein said elastic element (5) biases said second outer mesh (4) to said frame element (2).
3. Filter element (1 ) according to claim 2, wherein said frame element (2) encloses said elastic element (5) and said first outer mesh (3) and said second outer mesh (4), said first outer mesh (3) and said second outer mesh
(4) being arranged on opposing sides of said elastic element (5).
4. Filter element (1 ) according to any one of the preceding claims, wherein said first screen (6) further covers at least a portion of the area of the second outer mesh (4) through which said gas flow travels.
5. Filter element (1 ) according to any one of the preceding claims, wherein said first screen (6) extends around the elastic element (5) such that a double fold of said first screen (6) is arranged between said elastic element
(5) and said second outer mesh (4), and an open end of said first screen (6) is arranged between said first outer mesh (3) and said elastic element (5).
6. Filter element (1 ) according to claim 5, wherein said open end of said first screen (6) is arranged between said first screen (6) itself and said elastic element (5).
7. Filter element (1 ) according to claim 5 or 6, wherein said double fold and said open end is visible when viewed from the second outer mesh (4) in the travelling direction of said gas flow.
8. Filter element (1 ) according to any one of the preceding claims, further comprising a second screen (7) interposed between said elastic element (5) and said second outer mesh (4), said second screen (7) covering the area of said second outer mesh (4) through which said gas flow travels.
9. Filter element (1 ) according to claim 8, wherein said second screen (7) extends around the elastic element (5) such that a double fold of second screen (7) is arranged between said first outer mesh (3) and said elastic element (5), and an open end of said second screen (7) is arranged between said elastic (5) and said second outer mesh (4).
10. Filter element (1 ) according to claim 9, wherein said open end of said second screen (7) is arranged between said elastic element (5) and said second screen (7) itself.
1 1 . Filter element (1 ) according to claim 9 or 10, wherein said double fold and said open end is visible when viewed from the first outer mesh (3) against the travelling direction of said gas flow.
12. Filter element (1 ) according to any one of the claims 8-1 1 , wherein said first screen (6) is woven with a wire thickness within the interval of 50-70 micrometers, and said second screen (7) is woven with a wire thickness within the interval of 120-180 micrometers.
13. Filter element (1 ) according to any one of claims 1 -4, wherein said first screen (6) extends completely around said elastic element (5) and at least partly overlaps itself.
14. Filter element (1 ) according to any one of the preceding claims, wherein said first outer mesh (3) and second outer mesh (4), said first screen (6) and said second screen (7), and said elastic element (5) are made of stainless steel.
15. Filter element (1 ) according to claim 14, wherein said elastic element (5) consists of knitted stainless steel.
16. Spray dryer (9), comprising at least one filter element (1 ) according to any one of the claims 1 -15.
EP16707721.3A 2015-03-02 2016-03-02 Filter element for filtering a gas flow, and spray dyer comprising said filter Withdrawn EP3265208A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1550245 2015-03-02
PCT/EP2016/054354 WO2016139216A1 (en) 2015-03-02 2016-03-02 Filter element for filtering a gas flow, and spray dyer comprising said filter

Publications (1)

Publication Number Publication Date
EP3265208A1 true EP3265208A1 (en) 2018-01-10

Family

ID=55453158

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16707721.3A Withdrawn EP3265208A1 (en) 2015-03-02 2016-03-02 Filter element for filtering a gas flow, and spray dyer comprising said filter

Country Status (2)

Country Link
EP (1) EP3265208A1 (en)
WO (1) WO2016139216A1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1598097A (en) * 1925-07-27 1926-08-31 Mathis Eugene Air filter
US2639003A (en) * 1947-05-19 1953-05-19 Herman H Garner Method of assembling an air filter panel
US3774377A (en) * 1972-04-21 1973-11-27 American Air Filter Co Filter assembly with replaceable filter element

Also Published As

Publication number Publication date
WO2016139216A1 (en) 2016-09-09

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