WO2015096852A1 - Method of manufacturing a filter element and filter device - Google Patents

Method of manufacturing a filter element and filter device Download PDF

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Publication number
WO2015096852A1
WO2015096852A1 PCT/EP2013/077911 EP2013077911W WO2015096852A1 WO 2015096852 A1 WO2015096852 A1 WO 2015096852A1 EP 2013077911 W EP2013077911 W EP 2013077911W WO 2015096852 A1 WO2015096852 A1 WO 2015096852A1
Authority
WO
WIPO (PCT)
Prior art keywords
elongated bodies
carrier
filter
channels
bonding
Prior art date
Application number
PCT/EP2013/077911
Other languages
French (fr)
Inventor
Bernd Böhnke
Original Assignee
Outotec (Finland) Oy
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 Outotec (Finland) Oy filed Critical Outotec (Finland) Oy
Priority to PCT/EP2013/077911 priority Critical patent/WO2015096852A1/en
Publication of WO2015096852A1 publication Critical patent/WO2015096852A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/012—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/14—Filters

Definitions

  • the invention relates in general to manufacturing filter elements and in particular to solid liquid or solid gas separation.
  • Porous materials are generally known to be used for separating solids from fluids.
  • known filter elements are made from porous ceramics, from paper or from textile.
  • Paper or textile filter cloths usually need rigid structures, e.g. filter plates, for providing mechanical stability, and for channeling the filtrate fluids.
  • Filter devices are known to have a plurality of filter chambers, each filter chamber provided with one or two filter cloths.
  • the invention suggests a method of manufacturing a filter element, wherein elongated bodies are fixed to a surface by glueing an open end of each of the elongated bodies to the surface, a clearance between the elongated bodies is filled with a bonding carrier and each of the elongated bodies forms a channel protruding from the surface through the carrier to a top side of the element.
  • the elongated bodies may e.g. be hollow or solid fibers, tubes or needles from e.g. synthetics, metal or glasfiber.
  • the filter element manufactured according to the invention has distinct channels protruding through the carrier.
  • the surface is planar.
  • the filter element manufactured accordingly forms a filter plate.
  • the surface may be curved, to obtain a filter element that better resists to pressure, e.g. a spherical segment.
  • a bottom side of the carrier, where the open ends are glued may be cut after bonding of the carrier, for opening the channels.
  • channels that were closed by the glue, in such a way may be opened, again.
  • the elongated bodies are hollow.
  • the inner cavities of the elongated bodies thus already form channels protruding through the carrier.
  • the elongated bodies are removed after bonding of the carrier.
  • the channels enlarged to the outer diameter of the elongated bodies.
  • the elongated bodies are elastic, and pulled into a conical shape before filling the clearance.
  • the channels are conical.
  • the carrier is a plastic material.
  • Plastic materials in particular resins, are available at low prices and easy to process.
  • the carrier may be an elastic material, a metal, in particular aluminium, or ceramics that would be baked for bonding, or even any hybrid material.
  • the carrier is fiber reinforced. The resistance of a filter element manufactured accordingly against mechanical strain is enhanced.
  • the reinforcing elongated bodies are favorably aligned at right angles to the channels.
  • resistance against tension parallel to the surface may be enhanced.
  • the invention further suggest a filter device, having a plurality of filter elements manufactured according to the invention.
  • Such filter device according to the invention features the benefits mentioned above.
  • Fig. 1a-c illustrates steps of a first exemplary method according to the invention
  • Fig. 2a/b illustrates steps of a second exemplary method according to the invention
  • Fig. 3 shows a detail of an exemplary filter device according to the invention.
  • a total number of 5.000 elongated bodies 1 per mm 2 are fixed to a planar surface 2 of 1 x 1 cm by glue 3: An open end 4 of each of the elongated bodies 1 is glued to the surface 2
  • the elongated bodies 1 are from glasfiber and have a diameter 5 of 10 ⁇ and a length 6 of 10 cm.
  • the glue 3 is a resin.
  • a clearance 7 between the elongated bodies 1 is filled with a bonding carrier 8 (figure 1b).
  • the carrier 8 is a resin, namely epoxy.
  • the carrier 8 is removed from the surface 2, the bottom side 9 and the top side 10 of the carrier 8 cut, and the elongated bodies 1 dissolved, for opening the channels 11 (figure 1c).
  • elongated bodies 12 are glued to a surface 13.
  • the elongated bodies 12 are from synthetics and have a diameter 14 of 10 ⁇ and a length 15 of 10 cm.
  • the elongated bodies 12 are hollow and have an inner diameter 16 of 5..8 ⁇
  • the elongated bodies 12 After the open ends 17 of the elongated bodies 12 are fixed to the surface 13, tension is applied to the elongated bodies 12, to pull them into conical shape. After tension, the elongated bodies 12 have a length 18 and a minimum diameter 19 in the middle of the elongated body 12 (figure 2b). Then, a bonding carrier (not shown) is applied to the surface 13 up to the minimum diameter 19, as mentioned above. After hardening of the bonding carrier, the elongated bodies 12 are cut for achieving a conical porosity of the filter element (not shown).
  • Figure 3 shows a cut through a set 20 of two filter elements 21 , manufactured according to the second method, mentioned above.
  • This set 20 is a detail of a (not further shown) filter device.
  • the filter elements 21 have an entry side 22 and an outgoing side 23. At the entry sides 22, the filter elements 21 are charged with a liquid suspension that is loaded with solid particles, e.g. metal concentrate.
  • the solid particles are mostly too large to enter into the channels 24 of the filter elements 21 , and deposit at the entry sides 22 as a filter cake, a liquid fraction of the suspension penetrates through the same, as a filtrate. Some smaller of the particles that enter into the channels 24 are flushed through the channels 24 by the filtrate.
  • the entry sides 22 of the filter elements 21 have a non-sticking surface, and the filter cake is periodically removed by by its own weight, from the filter elements 21 , when opening the filter device. (The suspension, and its fractions as well as the filter cake are not shown.) In the figures are

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Materials (AREA)

Abstract

The invention suggests a method of manufacturing a filter element, wherein elongated bodies (1) are fixed to a surface (2) by glueing an open end (4) of each of the elongated bodies (1) to the surface (2), a clearance (7) between the elongated bodies (1) is filled with a bonding carrier (8) and each of the elongated bodies (1) forms a channel protruding from the surface (2) through the carrier (8) to a top side (10) of the element. The invention further suggests a filter device, having a plurality of filter elements manufactured according to any of the preceding claims.

Description

TITLE OF INVENTION
Method of manufacturing a filter element, and filter device TECHNICAL FIELD
The invention relates in general to manufacturing filter elements and in particular to solid liquid or solid gas separation.
BACKGROUND ART
Porous materials are generally known to be used for separating solids from fluids. In particular, known filter elements are made from porous ceramics, from paper or from textile. Paper or textile filter cloths usually need rigid structures, e.g. filter plates, for providing mechanical stability, and for channeling the filtrate fluids. Filter devices are known to have a plurality of filter chambers, each filter chamber provided with one or two filter cloths.
In ceramic filter elements, the size and shape of the pores makes these sensitive for blocking by solid particles. Soiling and blinding of the pores limits both the overall lifetime of such filter elements, and restricts their use to selected
applications, only
PROBLEM TO BE SOLVED
It is an object of the invention to provide an alternative filter element.
SUMMARY OF INVENTION
The invention suggests a method of manufacturing a filter element, wherein elongated bodies are fixed to a surface by glueing an open end of each of the elongated bodies to the surface, a clearance between the elongated bodies is filled with a bonding carrier and each of the elongated bodies forms a channel protruding from the surface through the carrier to a top side of the element. The elongated bodies may e.g. be hollow or solid fibers, tubes or needles from e.g. synthetics, metal or glasfiber. The filter element manufactured according to the invention has distinct channels protruding through the carrier.
In a favorable method according to the invention, the surface is planar. The filter element manufactured accordingly forms a filter plate. Alternatively, the surface may be curved, to obtain a filter element that better resists to pressure, e.g. a spherical segment.
In a method according to the invention, a bottom side of the carrier, where the open ends are glued, may be cut after bonding of the carrier, for opening the channels. Advantageously, channels that were closed by the glue, in such a way may be opened, again.
In an advantageous method according to the invention, the elongated bodies are hollow. The inner cavities of the elongated bodies thus already form channels protruding through the carrier.
In a beneficial method according to the invention, the elongated bodies are removed after bonding of the carrier. In a filter element manufactured accordingly, the channels enlarged to the outer diameter of the elongated bodies.
In a further favorable method according to the invention, the elongated bodies are elastic, and pulled into a conical shape before filling the clearance. In a filter element manufactured accordingly, the channels are conical. When charging the top side of the element with a fluid charged with solid particles, the latter may block the entries to the channels. However, any small solid particles penetrating into the channels, will always be flushed through the channel, by the following fluid.
In a further advantageous method according to the invention, the carrier is a plastic material. Plastic materials, in particular resins, are available at low prices and easy to process. As an alternative, the carrier may be an elastic material, a metal, in particular aluminium, or ceramics that would be baked for bonding, or even any hybrid material. In a beneficial method according to the invention, the carrier is fiber reinforced. The resistance of a filter element manufactured accordingly against mechanical strain is enhanced.
In a filter element manufactured accordingly, the reinforcing elongated bodies are favorably aligned at right angles to the channels. Thus, resistance against tension parallel to the surface may be enhanced.
The invention further suggest a filter device, having a plurality of filter elements manufactured according to the invention. Such filter device according to the invention features the benefits mentioned above. BEST MODE FOR CARRYING OUT THE INVENTION
Exemplary methods according to the invention are subsequently described in more detail with reference to the drawing figures.
Fig. 1a-c illustrates steps of a first exemplary method according to the invention , Fig. 2a/b illustrates steps of a second exemplary method according to the
invention, and
Fig. 3 shows a detail of an exemplary filter device according to the invention.
In a first exemplary method according to the invention, a total number of 5.000 elongated bodies 1 per mm2 are fixed to a planar surface 2 of 1 x 1 cm by glue 3: An open end 4 of each of the elongated bodies 1 is glued to the surface 2
(figure 1a). The elongated bodies 1 are from glasfiber and have a diameter 5 of 10 μηι and a length 6 of 10 cm. The glue 3 is a resin.
After the open ends 4 are fixed to the surface 2, a clearance 7 between the elongated bodies 1 is filled with a bonding carrier 8 (figure 1b). The carrier 8 is a resin, namely epoxy.
After bonding, the carrier 8 is removed from the surface 2, the bottom side 9 and the top side 10 of the carrier 8 cut, and the elongated bodies 1 dissolved, for opening the channels 11 (figure 1c). In a second exemplary method according to the invention, as mentioned above, elongated bodies 12 are glued to a surface 13. The elongated bodies 12 are from synthetics and have a diameter 14 of 10 μπι and a length 15 of 10 cm. The elongated bodies 12 are hollow and have an inner diameter 16 of 5..8 μηι
(figure 2a).
After the open ends 17 of the elongated bodies 12 are fixed to the surface 13, tension is applied to the elongated bodies 12, to pull them into conical shape. After tension, the elongated bodies 12 have a length 18 and a minimum diameter 19 in the middle of the elongated body 12 (figure 2b). Then, a bonding carrier (not shown) is applied to the surface 13 up to the minimum diameter 19, as mentioned above. After hardening of the bonding carrier, the elongated bodies 12 are cut for achieving a conical porosity of the filter element (not shown).
Figure 3 shows a cut through a set 20 of two filter elements 21 , manufactured according to the second method, mentioned above. This set 20 is a detail of a (not further shown) filter device.
The filter elements 21 have an entry side 22 and an outgoing side 23. At the entry sides 22, the filter elements 21 are charged with a liquid suspension that is loaded with solid particles, e.g. metal concentrate.
Whereas the solid particles are mostly too large to enter into the channels 24 of the filter elements 21 , and deposit at the entry sides 22 as a filter cake, a liquid fraction of the suspension penetrates through the same, as a filtrate. Some smaller of the particles that enter into the channels 24 are flushed through the channels 24 by the filtrate.
The entry sides 22 of the filter elements 21 have a non-sticking surface, and the filter cake is periodically removed by by its own weight, from the filter elements 21 , when opening the filter device. (The suspension, and its fractions as well as the filter cake are not shown.) In the figures are
1 elongated body
2 surface
3 glue
4 open end
5 diameter
6 length
7 clearance
8 carrier
9 bottom side
10 top side
11 channel
12 elongated body
13 surface
14 diameter
15 length
16 inner diameter
17 open end
18 length
19 minimum diameter
20 set
21 filter element
22 entry side
23 outgoing side
24 channel

Claims

Method of manufacturing a filter element (21), wherein a. elongated bodies (1 , 12) are fixed to a surface (2, 13) by glueing an open end (4, 17) of each of the elongated bodies (1 , 12) to the surface (2, 13), b. a clearance (7) between the elongated bodies (1 , 12) is filled with a bonding carrier (8) and c. each of the elongated bodies (1 , 12) forms a channel protruding from the surface (2, 13) through the carrier (8) to a top side (10) of the element.
Method according to the preceding claim, wherein the surface (2, 13) is planar.
Method according to any of the preceding claims, wherein a bottom side (9) of the carrier (8), where the open ends (4, 17) are glued, is cut after bonding of the carrier (8), for opening the channels (1 1 , 24).
Method according to any of the preceding claims, wherein the elongated bodies (12) are hollow.
Method according to any of the preceding claims, wherein the elongated bodies (1) are removed after bonding of the carrier (8).
Method according to any of the preceding claims, wherein the elongated bodies (12) are elastic, and pulled into a conical shape before filling the clearance.
Method according to any of the preceding claims, wherein the carrier (8) is a plastic material.
Method according to any of the preceding claims, wherein the carrier is fiber-reinforced.
Method according to the preceding claim, wherein reinforcing elongated bodies are aligned at right angles to the channels.
10. Filter device, having a plurality of filter elements (21) manufactured according to any of the preceding claims.
PCT/EP2013/077911 2013-12-23 2013-12-23 Method of manufacturing a filter element and filter device WO2015096852A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2013/077911 WO2015096852A1 (en) 2013-12-23 2013-12-23 Method of manufacturing a filter element and filter device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2013/077911 WO2015096852A1 (en) 2013-12-23 2013-12-23 Method of manufacturing a filter element and filter device

Publications (1)

Publication Number Publication Date
WO2015096852A1 true WO2015096852A1 (en) 2015-07-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/077911 WO2015096852A1 (en) 2013-12-23 2013-12-23 Method of manufacturing a filter element and filter device

Country Status (1)

Country Link
WO (1) WO2015096852A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1121799B (en) * 1957-01-24 1962-01-11 Franz Xaver Wortmann Dr Ing Process for the production of porous molded articles from plastic

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1121799B (en) * 1957-01-24 1962-01-11 Franz Xaver Wortmann Dr Ing Process for the production of porous molded articles from plastic

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