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WO1998001209A1 - Filtre texture avec systeme de depoussierage par air comprime pour nettoyer des gaz charges de poussieres - Google Patents

Filtre texture avec systeme de depoussierage par air comprime pour nettoyer des gaz charges de poussieres Download PDF

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Publication number
WO1998001209A1
WO1998001209A1 PCT/DE1997/001447 DE9701447W WO9801209A1 WO 1998001209 A1 WO1998001209 A1 WO 1998001209A1 DE 9701447 W DE9701447 W DE 9701447W WO 9801209 A1 WO9801209 A1 WO 9801209A1
Authority
WO
WIPO (PCT)
Prior art keywords
cleaning
filter
openings
shut
clean gas
Prior art date
Application number
PCT/DE1997/001447
Other languages
German (de)
English (en)
Inventor
Rainer Minwegen
Original Assignee
Rainer Minwegen
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 Rainer Minwegen filed Critical Rainer Minwegen
Publication of WO1998001209A1 publication Critical patent/WO1998001209A1/fr

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
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/04—Cleaning filters
    • 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
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/4272—Special valve constructions adapted to filters or filter elements
    • 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
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
    • B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
    • 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
    • B01D46/90—Devices for taking out of action one or more units of multi-unit filters, e.g. for regeneration or maintenance
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

Definitions

  • the present invention relates to a fabric filter with compressed air cleaning for cleaning dust-containing gases consisting of at least one chamber, which is divided into a raw gas space and a clean gas space by a perforated floor, the perforated floor accommodating filter elements in rows, which protrude on all sides into the raw gas space and one in each have the opening leading the clean gas space, with stationary compressed air nozzles being arranged above these openings for cleaning the filter elements.
  • the filter elements of fabric filters such as filter bags and filter bags, must be cleaned at intervals since they are clogged with a layer of dust after a certain period of operation.
  • a widespread cleaning system is that, reversing the direction of filtration, compressed air, usually pulsed, is blown primarily into the openings of the filter elements from the clean gas space and thereby entrains secondary air from the clean gas space.
  • the filter elements are thereby inflated to the outside, whereby the adhering filter cake is detached from the outer surfaces of the filter elements and falls into a dust collector arranged below the filter elements.
  • Each of these chambers can be separated from the clean gas duct in the clean gas space by means of a shut-off element, usually a poppet valve, as a result of which the filter elements belonging to one chamber are removed from the filtration process.
  • a shut-off element usually a poppet valve
  • the individual chambers are made relatively large, ie a relatively large number of filter elements are combined to form a cleaning unit.
  • a disadvantage of the systems with chamber shutdown is that the net filter area is reduced significantly during the shutdown time.
  • uneven operation of the filter system due to changing pressure and volume ratios must be accepted.
  • this uneven operation has a particularly disruptive effect on the sorption behavior of the dusts.
  • Another disadvantage is that when a chamber is switched off and cleaned, large amounts of dust are produced at once, which leads to blockages in the discharge of dust from the dust collector. This disadvantage also occurs somewhat less in systems in which the filter elements are cleaned in rows or groups after the chamber has been switched off, since after switching off the chambers, a large part of the filter cake is already detached from the filter elements due to the lack of negative pressure.
  • the object of the present invention is therefore to provide a to provide a structural design of the type mentioned at the outset, with which small units of the filter can be easily separated from the total gas flow for cleaning purposes.
  • the gas is sucked through the filter through a fan arranged behind the filter, viewed from the gas flow, so that there is a certain negative pressure in the filter housing.
  • the chamber is preferably separated both in the clean gas and in the raw gas space. In the proposed arrangement, however, separation is only carried out in the clean gas area. men. It is therefore to be expected that the cleaning effect will be further improved by the plant negative pressure which continues to exist in the raw gas area. Conversely, with the same cleaning effect, the requirements for the compressed air supply in terms of pressure and quantity can be reduced.
  • movability of the shut-off element means both a translatory and a rotational movement.
  • a rotary movement of the shut-off element according to subclaims 2 and 3 is particularly advantageous, since it enables a large number of cleaning channels to be shut off in a structurally simple manner.
  • the maximum shut-off cleaning channels are given if their openings are arranged on a circumference around the shut-off element (claim 2).
  • Shut-off elements with rotary movement are also particularly suitable for retrofitting filter chambers with a poppet valve as a shut-off device.
  • the circular passage cross section of the poppet valves can advantageously be used as the installation location of the shut-off element according to the invention.
  • FIG. 1 is a unicameral hose filter in side view and sectional view according to section I-I of FIG. 2,
  • Fig. 2 shows a section II-II of FIG. 1
  • FIG. 3 shows a three-chamber bag filter in a sectional view corresponding to FIG. 2.
  • FIGS. 1 and 2 shows a single-chamber hose filter with eight rows of filter bags 4 in a housing 7.
  • a perforated base 1 serves to hold the filter bags 4 with their support baskets 5.
  • the filter bags 4 project closed into a raw gas space on all sides 3 of the filter. Their outlet openings 18 open into a clean gas space 2 of the filter.
  • the clean gas space 2 is subdivided into cleaning channels 12 by hose partition walls 11, a number of filter bags 4 being assigned to each cleaning channel 12.
  • the openings 19 of the cleaning channels 12 open into a common clean gas space 23 and are arranged such that they lie on a circular arc section 21, which is shown in broken lines in FIG. 2.
  • the pivot axis 20 of a shut-off element 13 is arranged, which is rotatably mounted in bearings 14 and 15.
  • the shut-off element 13 is driven by an electric motor 16 which is fastened to the outside of the filter housing 7 via a holder 17.
  • the shut-off element 13 has a shut-off surface 22, the curvature of which corresponds to that of the circular arc section 21.
  • the width of the shutoff surface 22 is selected so that an opening 19 of the cleaning channels 12 can be shut off.
  • the dust-containing gas flows through a raw gas inlet 6 into the filter housing 7 and is cleaned as it passes through the filter bags 4.
  • the cleaned gas then flows through the outlet openings 18 of the filter bags 4 into the clean gas space 2 divided by the cleaning channels 12 and from there into the common clean gas space 23 and leaves the filter via a clean gas outlet 8 for further use.
  • the compressed air cleaning consists of a compressed air tank 9 and nozzle assemblies 10, which extend in rows over the filter bags 4 and are each provided with nozzles via their outlet openings 18.
  • the shut-off element 13 is moved step by step in front of the openings 19 of the individual cleaning channels 12, as a result of which the normal gas flow is interrupted by the filter bags 4 which are shut off in each case. Simultaneously with the blocking of a cleaning channel 12, the associated nozzle assembly 10 is activated, i.e. the filter bags 4 are cleaned by compressed air. If it is not necessary to clean the filter, the shut-off element 13 can be moved into a neutral position, which is shown in broken lines in FIG. 2.
  • Fig. 3 shows a further embodiment. This relates to a three-chamber bag filter, which is practically a parallel connection of the Einkam er filter of the first embodiment described above.
  • Fig. 3 therefore, only one chamber is provided with reference numerals. The same reference numerals apply identically to the other chambers. 3 it is quite obvious that the otherwise conventional chamber shut-off valves or flaps have been eliminated due to the solution according to the invention.
  • These shut-off devices are expensive due to the high air volume of large filter systems, complex and due to the switching frequency repair and maintenance. According to the invention, they have been replaced by the shut-off elements 13 which can be moved stepwise in front of the openings 19 of the cleaning channels 12.
  • shut-off elements 13 have to close far smaller air volumes than the conventional chamber shut-off devices.
  • the wear that occurs when opening and closing against the negative pressure is much less.
  • the area to be cleaned is reduced.
  • a maximum of three bag filter rows are cleaned at the same time, while in the case of a chamber shutdown, eight bag filter rows would have to be taken out of operation at the same time, ie the invention provides a substantially larger net filter area during cleaning.
  • the area to be cleaned can be reduced from approx. 1/4 to 1/5 to approx. 1/20 to 1/50, and this with very simple means that also realize off 1 ine cleaning in online operation .
  • the individual chambers of the filter shown in FIG. 3 are cleaned in the same way as described for the first exemplary embodiment.
  • the cleaned gases leave the chambers via their clean gas outlets 8 and reach a clean gas collecting duct 24, in which they flow to the fan, which is indicated by the arrow 25.

Landscapes

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

Abstract

La présente invention concerne un filtre texturé comportant un système de dépoussiérage par air comprimé pour nettoyer des gaz chargés de poussières. Ce filtre comprend au moins une chambre divisée par un fond perforé (1) en une chambre de gaz brut (3) et une chambre de gaz pur (2). Le fond perforé (1) abrite des rangées d'éléments filtrants (4) fermés de tous les côtés, qui font saillie dans la chambre de gaz brut (3) et présentent chacun une ouverture (18) conduisant à la chambre de gaz pur (2). Des buses d'air comprimé stationnaires, situées au-dessus des ouvertures (18) des éléments filtrants (4), servent à dépoussiérer les éléments filtrants (4). L'invention vise à concevoir un filtre permettant facilement de séparer de petites unités du filtre, du flux total de gaz pour le dépoussiérage. A cet effet, la chambre de gaz pur (2) est divisée en canaux de dépoussiérage (12) au niveau des ouvertures d'évacuation (18) des éléments filtrants (4), par des parois (11) constituées de rangées de tuyaux. Les ouvertures (19) des canaux (12) débouchent dans une chambre de gaz pur commune (12) et peuvent être obturées successivement par un élément d'obturation (13) mobile.
PCT/DE1997/001447 1996-07-09 1997-07-09 Filtre texture avec systeme de depoussierage par air comprime pour nettoyer des gaz charges de poussieres WO1998001209A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19627514.8 1996-07-09
DE19627514A DE19627514A1 (de) 1996-07-09 1996-07-09 Gewebefilter mit Druckluftabreinigung zur Reinigung von staubhaltigen Gasen

Publications (1)

Publication Number Publication Date
WO1998001209A1 true WO1998001209A1 (fr) 1998-01-15

Family

ID=7799264

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1997/001447 WO1998001209A1 (fr) 1996-07-09 1997-07-09 Filtre texture avec systeme de depoussierage par air comprime pour nettoyer des gaz charges de poussieres

Country Status (2)

Country Link
DE (1) DE19627514A1 (fr)
WO (1) WO1998001209A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10101219C9 (de) 2001-01-12 2018-05-17 Nilfisk-Advance A/S Schmutzsauger
DE20208300U1 (de) 2002-05-28 2002-08-29 Intensiv-Filter GmbH & Co. KG, 42555 Velbert Reinigungsvorrichtung für rohrförmige Filterelemente
DE102012207139A1 (de) * 2012-04-27 2013-10-31 GARANT-Filter GmbH Verfahren und Vorrichtung zum Filtern von Partikeln aus Gasen
CN109838868A (zh) * 2017-11-28 2019-06-04 山西彩云归科技有限公司 一种分体式新风机装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1947737A1 (de) * 1969-09-20 1971-05-27 Luehr Staubtech Taschenfilter mit einem Mehrkammergehaeuse
DE2430279A1 (de) * 1973-06-25 1975-01-23 Clarkes Sheet Metal Luftfilteranordnung
WO1984000902A1 (fr) * 1982-08-24 1984-03-15 New Come Filters Limited Filtre a gaz
EP0299898A2 (fr) * 1987-07-07 1989-01-18 Jean-Pierre Dandy Procédé de décolmatage automatique de filtre à air à manches et dispositif pour sa mise en oeuvre
WO1993013845A1 (fr) * 1992-01-16 1993-07-22 Ola Rindal Procede et appareil pour nettoyer la toile de filtres a sacs
US5405421A (en) * 1993-09-22 1995-04-11 Swisher, Jr.; George W. Gas stream filtering system using filtered gas for reverse flow cleaning

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2829683A1 (de) * 1978-07-06 1980-01-24 Heinz Hoelter Zweikammerfilter, vorzugsweise fuer den bergbau

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1947737A1 (de) * 1969-09-20 1971-05-27 Luehr Staubtech Taschenfilter mit einem Mehrkammergehaeuse
DE2430279A1 (de) * 1973-06-25 1975-01-23 Clarkes Sheet Metal Luftfilteranordnung
WO1984000902A1 (fr) * 1982-08-24 1984-03-15 New Come Filters Limited Filtre a gaz
EP0299898A2 (fr) * 1987-07-07 1989-01-18 Jean-Pierre Dandy Procédé de décolmatage automatique de filtre à air à manches et dispositif pour sa mise en oeuvre
WO1993013845A1 (fr) * 1992-01-16 1993-07-22 Ola Rindal Procede et appareil pour nettoyer la toile de filtres a sacs
US5405421A (en) * 1993-09-22 1995-04-11 Swisher, Jr.; George W. Gas stream filtering system using filtered gas for reverse flow cleaning

Also Published As

Publication number Publication date
DE19627514A1 (de) 1998-01-15

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