EP1888203A1 - Flexible de filtration - Google Patents

Flexible de filtration

Info

Publication number
EP1888203A1
EP1888203A1 EP06761921A EP06761921A EP1888203A1 EP 1888203 A1 EP1888203 A1 EP 1888203A1 EP 06761921 A EP06761921 A EP 06761921A EP 06761921 A EP06761921 A EP 06761921A EP 1888203 A1 EP1888203 A1 EP 1888203A1
Authority
EP
European Patent Office
Prior art keywords
filter
hose according
filter body
nonwoven fabric
fibers
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Withdrawn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
EP06761921A
Other languages
German (de)
English (en)
Inventor
Mike Koschak
Sebastian Junqueras
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.)
Carl Freudenberg KG
Original Assignee
Carl Freudenberg KG
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 Carl Freudenberg KG filed Critical Carl Freudenberg KG
Publication of EP1888203A1 publication Critical patent/EP1888203A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • 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
    • B01D46/58—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 parallel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
    • B01D39/163—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin sintered or bonded
    • 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
    • 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
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
    • B01D2239/0216—Bicomponent or multicomponent fibres

Definitions

  • the invention relates to a filter hose for bag filter systems, comprising a tubular filter body which is closed at one end face and at the other end face has a receptacle for attachment in the bag filter system.
  • Bag filter systems are well known. Bag filter systems are often used to clean dusty gases in power plants. In a bag filter system are several
  • Filter hoses combined.
  • the filter bags are mounted on a support body, which is located on the clean gas side.
  • the dust is retained on the outside of the hose and the purified gas passes from the interior of the filter bag into the clean gas side.
  • Filter hoses can be cleaned by applying pressure surges on the clean gas side. Due to the pressure surge, the filter cake adhering to the filter bag is released and falls into a dust collecting container on the raw gas side.
  • Filter hoses are often made of needle felt. Needle felt is inexpensive and has a low pressure drop. It is disadvantageous that the Needlefelt has production-related penetration points that increase the permeability to particles.
  • the invention has for its object to provide a filter bag having an improved separation efficiency.
  • the filter body is formed of a thermally bonded nonwoven fabric.
  • Thermally bonded nonwovens have a small pore size by materially connected, partially melted fibers. As a result, a high separation efficiency is achieved even for small particles.
  • the nonwoven fabric has a small thickness and the filtration is due to the small pores on the surface of the filter body. This is advantageous over needle felts, in which a depth filtration takes place within the nonwoven fabric. The particles stick to the surface and can be cleaned more easily. The cleaning is further improved by the smooth surface of the nonwoven fabric, which results from melting processes. Additional coatings are not required, so that the nonwoven fabric can be provided inexpensively.
  • the thermal consolidation results in a nonwoven fabric with a high strength, so that nonwovens with a basis weight of less than 500 g / m 2 can be used for filter bags.
  • the nonwoven fabric may be formed from a fiber blend of high and low melting fibers, which fibers may be bonded together by a melt process.
  • the melting process is conducted at a temperature lower than that
  • Melting temperature of the refractory fibers and is greater than or equal to the melting temperature of the low-melting fibers.
  • the fibers of the nonwoven fabric may include polyolefin fibers or polyester fibers.
  • the polyester fibers may be formed from polyethylene terephthalate or polybutylene terephthalate.
  • the provision of fibers of polyolefins or polyesters allows fixation with other fibers in the nonwoven fabric. It is conceivable that a taullierillieres polyethylene fiber material is thermally fixed with low-melting polyolefin fibers or polyesters. In the thermal fixation, however, only the binder fibers are melted and modified with regard to their surface condition, wherein the pulp material is not affected by the thermal fixing process and structural fibers.
  • the nonwoven fabric can be solidified over its entire surface.
  • the full-surface solidification can be done for example in a heating calender. This results in cost complete equipment of the nonwoven fabric with the advantageous properties of the thermally bonded nonwoven fabric.
  • the solidification point by point.
  • the nonwoven fabric may comprise fused bicomponent fibers.
  • a component has a lower melting temperature than the other fibers.
  • one component comprises polyethylene and the other polypropylene.
  • a nonwoven fabric is realized in which a fiber also acts as a binder fiber and structural fiber.
  • the core of the bicomponent fiber consists of a highly stable and melting at a higher temperature material such as polypropylene, wherein the sheath could melt from polyethylene at a very low temperature.
  • bicomponent fibers for thermal fixation of fiber blends are particularly suitable, since they can produce a bond with the fiber material even at very low melting temperatures and act as structural fibers after the connection. In this process, only the mantle surface of the bicomponent fibers is melted, whereby the bicomponent fibers form a composite with the fiber material.
  • the nonwoven fabric can be grooved.
  • the filter surface of the filter body increases and there is an improved extensibility of the filter body in the radial direction, which improves the Abinstituts .
  • By grooving the filter body is dimensionally stable, especially in the axial direction.
  • the filter body may have three-dimensional structures.
  • the structures may additionally or instead of the grooving be introduced into the filter body. Possible structures are, for example, raised or recessed pimples or waves.
  • the structures can be permanently introduced into the filter body by deep drawing. The structure increases the filter surface and the flexibility of the filter body.
  • the nonwoven fabric may have a coating.
  • the coating may be formed by nanofibers whose fiber diameter is less than 1 ⁇ m or by a PTFE coating. This coating increases again the separation efficiency of the filter.
  • Other possible coatings can be applied to the filter body by plasma treatments or dip coatings.
  • the filter body can be hydrophilic / hydrophobic and / or oleophilic / oleophobic.
  • Another coating forms the vapor deposition of the filter body with metallic material. By steaming the filter body is antistatic and the risk of fire drops. Another antistatic finish is achieved by incorporating metal filaments or printed carbon structures.
  • salts such as boron salts, the filter body can be additionally equipped with low flammability.
  • the filter body may have a longitudinal seam, which is closed by a material fit.
  • the filter body can be easily and inexpensively made of web material. Cohesive connections can be made gas-tight by simple means.
  • the seam can be welded. Welding is easy and inexpensive.
  • the seam can be closed by means of ultrasonic welding. In this method, no auxiliaries are required and the seam is sealed gas-tight.
  • An end face can be closed by a cover made of needle felt.
  • the closed end face lies in the direction of flow on the raw gas side and is thus exposed to increased abrasion by fast flowing particles.
  • the needle felt cover prevents premature wear of the filter body.
  • the cover may have a ring, the outer peripheral side on
  • Filter body is arranged and having an inner peripheral side arranged on the filter body lid having a cylindrical portion which is arranged opposite the ring, wherein the ring, filter body and portion are sewn together. This results in a particularly stable and secure attachment of the cover on the filter body.
  • the cover has a lot of material, which prevents premature wear.
  • the recording can be formed by a snap ring.
  • a snap ring is a secure and quick-release attachment.
  • the snap ring may have a sheath of needle felt, wherein the sheath is sewn to the filter body. As a result, the snap ring is protected from damage.
  • FIGS. show, in each case schematically:
  • Fig. 1 shows a filter tube according to the invention
  • Fig. 2 is a bag filter system.
  • Figure 1 shows a filter hose 1 for bag filter systems 2.
  • Filter tube 1 is formed from a tubular filter body 3, which consists of a thermally bonded nonwoven fabric.
  • the nonwoven fabric is thermally bonded over the entire surface and comprises bicomponent fibers.
  • the bicomponent fibers have a core of high-melting polypropylene and a sheath of low-melting polyethylene.
  • the filter body 3 has a longitudinal seam 7, which is closed by means of ultrasonic welding material fit and gas-tight.
  • the filter body 3 is additionally grooved in the axial direction. On an end face 4 of the filter body 3 is closed by a cover 8 made of needle felt.
  • the cover 8 consists of a ring 9 which is arranged on the outer circumference of the filter body 3 and from an inner peripheral side of the filter body 3 arranged cover 10, which has a cylindrical portion 11 which is arranged opposite the ring 9. Ring 9, filter body 3 and section 11 are sewn together.
  • a receptacle 6 is arranged for attachment in the bag filter system 2, which is formed by a snap ring.
  • the receptacle 6 has a sheath 12 made of needle felt, which is sewn to the filter body 3.
  • FIG. 2 shows a bag filter system 2 for stationary dedusting installations in power plants in which filter bags 1 according to FIG. 1 are mounted.

Abstract

L'invention concerne un flexible de filtration (1 ) destiné à des installations à flexibles de filtration (2) et comprenant un corps filtrant (3) ayant une forme de flexible. Ce corps filtrant a une face frontale (4) fermée, l'autre face frontale (5) présentant un logement (6) à fixer dans l'installation à flexibles de filtration (2). Le corps filtrant (3) est réalisé sous la forme d'un tissé consolidé thermiquemement.
EP06761921A 2005-06-06 2006-05-20 Flexible de filtration Withdrawn EP1888203A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005026156A DE102005026156A1 (de) 2005-06-06 2005-06-06 Filterschlauch
PCT/EP2006/004805 WO2006131199A1 (fr) 2005-06-06 2006-05-20 Flexible de filtration

Publications (1)

Publication Number Publication Date
EP1888203A1 true EP1888203A1 (fr) 2008-02-20

Family

ID=36754206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06761921A Withdrawn EP1888203A1 (fr) 2005-06-06 2006-05-20 Flexible de filtration

Country Status (6)

Country Link
US (1) US20090199715A1 (fr)
EP (1) EP1888203A1 (fr)
KR (1) KR20070120129A (fr)
CN (1) CN101189057A (fr)
DE (1) DE102005026156A1 (fr)
WO (1) WO2006131199A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006014236A1 (de) 2006-03-28 2007-10-04 Irema-Filter Gmbh Plissierbares Vliesmaterial und Verfahren und Vorrichtung zur Herstellung derselben
US7837756B2 (en) * 2007-04-05 2010-11-23 Aaf-Mcquay Inc. Filter with ePTFE and method of forming
US8673040B2 (en) 2008-06-13 2014-03-18 Donaldson Company, Inc. Filter construction for use with air in-take for gas turbine and methods
DE102009002389A1 (de) * 2009-04-15 2010-10-21 BSH Bosch und Siemens Hausgeräte GmbH Kondensationstrockner mit einer Filtervorrichtung sowie Verfahren zu seinem Betrieb
DE102010052155A1 (de) 2010-11-22 2012-05-24 Irema-Filter Gmbh Luftfiltermedium mit zwei Wirkmechanismen
DE102013008402A1 (de) 2013-05-16 2014-11-20 Irema-Filter Gmbh Faservlies und Verfahren zur Herstellung desselben
EP2995360B1 (fr) * 2014-09-12 2022-06-15 Carl Freudenberg KG Élément de filtre
EP3705166A1 (fr) 2019-03-08 2020-09-09 Carl Freudenberg KG Tuyau flexible de filtrage en version toroïdale

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DE4021607A1 (de) * 1990-07-06 1992-01-09 Klaus Schumann Filterelement
GB9027051D0 (en) * 1990-12-13 1991-02-06 Scapa Group Plc Improved filter element
DE9318673U1 (de) * 1993-12-07 1994-11-17 Deichmann Jochen Hohlzylindrisches Filterelement und damit hergestellte Filtereinheit
EP1074644A1 (fr) * 1999-08-02 2001-02-07 Fiber Innovation Technology, Inc. Fibres à plusieurs composants avec résilience et étoffes textiles les utilisant
US20030192294A1 (en) * 2002-04-16 2003-10-16 Alan Smithies Filter medium
US20040128961A1 (en) * 2002-05-10 2004-07-08 U.F. Strainrite Corporation Filter bag and method of manufacture thereof
US20030208998A1 (en) * 2002-05-10 2003-11-13 U.F. Strainrite Corporation Filter bag and method of manufacture thereof
DE10225909B4 (de) * 2002-06-11 2005-08-04 Intensiv-Filter Gmbh & Co. Kg Verfahren zur Herstellung eines Rohrfilters durch Wickeln sowie Rohrfilter
CN1729101A (zh) * 2002-10-22 2006-02-01 帕里莫集团有限公司 具有改进的静电消散的水力缠绕过滤介质及其制造方法
TWI349614B (en) * 2006-01-25 2011-10-01 Asahi Kasei Fibers Corp Non-woven fabric laminated by heat bonding
US7485592B2 (en) * 2006-09-13 2009-02-03 E.I. Du Pont De Nemours And Company Bag filter comprising polyphenylene sulfide and acrylic fiber
CN103361758A (zh) * 2007-03-23 2013-10-23 索维高级聚合物股份有限公司 燃煤烟道气过滤器
DE102007023806A1 (de) * 2007-05-21 2008-11-27 Carl Freudenberg Kg Lagenverbund zur Verwendung in einem Luftfilter
US7819936B2 (en) * 2007-08-22 2010-10-26 E.I. Du Pont De Nemours And Company Filter felts and bag filters comprising blends of fibers derived from diamino diphenyl sulfone and heat resistant fibers
US8500883B2 (en) * 2008-07-18 2013-08-06 General Electric Company Apparatus and system for filtering air
US8021996B2 (en) * 2008-12-23 2011-09-20 Kimberly-Clark Worldwide, Inc. Nonwoven web and filter media containing partially split multicomponent fibers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006131199A1 *

Also Published As

Publication number Publication date
KR20070120129A (ko) 2007-12-21
DE102005026156A1 (de) 2006-12-28
US20090199715A1 (en) 2009-08-13
CN101189057A (zh) 2008-05-28
WO2006131199A1 (fr) 2006-12-14

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