WO1992000134A1 - Appareil de filtrage destine a enlever les particules d'un flux gazeux - Google Patents

Appareil de filtrage destine a enlever les particules d'un flux gazeux Download PDF

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Publication number
WO1992000134A1
WO1992000134A1 PCT/DK1991/000181 DK9100181W WO9200134A1 WO 1992000134 A1 WO1992000134 A1 WO 1992000134A1 DK 9100181 W DK9100181 W DK 9100181W WO 9200134 A1 WO9200134 A1 WO 9200134A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
air
cleaning
chamber
filter elements
Prior art date
Application number
PCT/DK1991/000181
Other languages
English (en)
Inventor
Bent Larsen
Original Assignee
Bent Larsen
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 Bent Larsen filed Critical Bent Larsen
Publication of WO1992000134A1 publication Critical patent/WO1992000134A1/fr

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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
    • B01D46/0002—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
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
    • B01D46/446—Auxiliary equipment or operation thereof controlling filtration by pressure measuring
    • 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

Definitions

  • the invention relates to a filter apparatus for the removal of particles from gas flows, such as air, smoke and waste gases, which flow through the apparatus, said apparatus comprising an inlet channel for the flow of gas to a chamber with a bag-type or tubular filter which the gas passes before being led out in cleaned state through an outlet channel, said filter comprising a number of filter elements consisting of a tubular frame with an external filter blanket suspended by the end in a wall in the chamber, and with means for the cleaning of the filter by blowing with air in the opposite direction through the filter, and means for the collection of the particles deposited in the chamber and the filter.
  • gas flows such as air, smoke and waste gases
  • Apparatus of this kind is used for the removal of particles from industrial plants, either in order to be able to collect valuable materials from the flows of gas, or to prevent materials from escaping to the surrounding environ ⁇ ment and constituting a health risk, causing damage by corrosion or giving rise to general pollution.
  • the materials which are hereby removed by such filter apparatus can be solid materials, dust particles or liquid particles in the form of drops.
  • the known apparatus of this kind is encumbered with draw ⁇ backs and disadvantages which limit the use and efficiency.
  • the known apparatus cannot work at high temperatures, the reason being that the parts of the apparatus are relatively temperature sensitive, especially the filter blanket, which cannot function at high temperatures at which it breaks down.
  • the apparatus is constantly held at the same efficiency, since as mentioned a continuous cleaning of the elements can take place. Furthermore, by the blowing in of cooled compressed air, the filter blanket will also be cooled, which not only extends its lifetime but also provides the possibility of operation at higher gas-flow temperatures, whereby the cooling of the gas can be reduced or possibly avoided completely.
  • the filter elements As disclosed in claim 3, by providing the filter elements with a baseplate, the air flow will be reflected from the bottom and vertical oscillations will arise in the filter element, whereby the bag is more quickly cleaned due to the vibrations.
  • the filter blanket As disclosed in claim 4, by narrowing-down the filter pipe's inlet end for compressed air from the nozzles, in the form of a conical pipe piece, the filter blanket also here will be cleaned, since the pressure effect also effectively influences these inclined surfaces.
  • the dewpoint will be raised so much that no concentration can take place in the apparatus, and thus no sullying of the insides of the apparatus.
  • the nozzles by controlling the position of the nozzles in relation to the filter elements and the supplied compressed air when the nozzles are in the cleaning position, compressed air can be saved and an effective and quick cleaning of the individual filter elements can be ensured.
  • fig. 1 shows a sectional view of an apparatus during operation seen in the direction I-I in fig. 2,
  • fig. 2 shows a sectional view of the apparatus seen in the direction II-II in fig. 1, and
  • fig. 3 shows an enlarged view of a pair of filter ele ⁇ ments during cleaning and filtration respectively.
  • the apparatus is built in a tower which comprises a side- wall consisting of a shroud 1 and an insulation layer 2, and a heating element, for example in the form of a heating spiral 3, in a part of the tower as shown in fig. 1.
  • the flow of gas is introduced into the side of the tower through a channel 4 to a chamber 10 in the tower, this chamber serving as a sedimentation chamber, in that the heavy particles 8 will fall to the bottom at the end of a funnel 5 and be collected in a container 7 placed under the funnel.
  • the container 7 can be removed for emptying as required through a hatch 6 in the side of the tower.
  • the top of the chamber 10 is closed by a wall 18 to which the filter is mounted.
  • This comprises a number of filter elements 11 which, for example, can be placed in two con ⁇ centric circular arcs as shown in fig. 2, and in such a manner that the elements 11 lie in pairs on a radius through the centre 31.
  • each of the elements is built up of an inner grid of longitudinal stiffeners 12 which, at the top, are bent to form a conical narrowed-down portion 15.
  • the stiffeners 12 are held together by a number of rings 13.
  • the top of the grid is secured to the wall 18 around a hole formed in the plate.
  • the filter blanket 16 which can be bag -shaped or tubular, can hereafter by drawn onto the grid and bent over at the top around the upper ring 13.
  • a bush 17 can now be pressed down from above through the the hole 18 in the plate to secure the filter blanket 16 around the grid.
  • the filter blanket can be of any suitable material, but at temperatures up to and above 800 ⁇ C it will consist of a ceramic material.
  • a pivotable pipe 22 for the introduction of compressed air for use in the cleaning of the filter elements 11 when these are blocked.
  • This is effected by means of a set of nozzles 20 mounted on the end of the pipe 22 and a pair of mouthpieces 19 which are suspended in a holder 21, see especially fig. 3.
  • the mouthpieces 19 are configured as inlet cones and outlet cones with a narrowed-down portion between them.
  • the filter elements 11 will quickly be blown clean, for example in one second, by pressure which can vary between one and twelve bar, depending on the conditions.
  • the volume will naturally depend on the dimensions of the elements, but since it is supplemented with about a corresponding amount of air from the surround ⁇ ings, the consumption of compressed air for the cleaning is strongly reduced in comparison with known systems.
  • the supply of this cleaning air is effected via an over- lying unit which is mounted on top of a headplate 24, so that the nozzles 19, 20 and the pipe 22 are disposed in a limited space 23 for the gas flow from the filter elements 11 to the outlet channel 35.
  • the cleaned flue- gas is led through an exhaust system 36 with regulation damper and discharged through an outlet 37, see fig. 1.
  • the exhaust can be adjusted according to temperature and the pressure variations in the apparatus in order to produce a so-called balanced ventilation, which contributes towards the stable cleaning in the apparatus.
  • the compressed air is fed through a pipe 26 to a tank 27, from which via a solenoid valve 28 it is conducted to an air lock 33, which enables through-flow for the compressed air during the turning of the pipe 22 around the centreline 31, see fig. 2.
  • control disk 30 which turns together with the pipe 22. This can be effected by means of a drive 33 with motor.
  • a scanning arm 29 scans the disk 30 and hereby provides pulses for the regulation of the turning movement of the pipe 22, so that cleaning air is not supplied until the nozzles 19, 20 are disposed above the filter elements 11, after which a signal is sent to the solenoid valve 28 for the opening of the supply of cleaning air through the nozzles.
  • an apparatus can effect clean- ing with dust particles of a size right down to l ⁇ , and with a cleanliness of a maximum of 5 g dust per m 3 gas.
  • a further advantage of this apparatus is that the filter blanket 16 is cleaned so effectively that no dust particles are left on the filter blanket 16 after a blowing out, and consequently that no injurious bacteriological growth can take place, and also that no infestants will be able to thrive on these filter elements.
  • the pressure applied is of the same temperature as the surroundings, in that the upper compartment is ventilated through channels 25.
  • the filter blanket is hereby effectively cooled when blown clean, which contributes towards the longer durability of the filter blanket.
  • the apparatus can herewith clean gas flows with higher temperatures than with apparatus which does not use cooled air for the blowing clean of the filter.

Landscapes

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

Abstract

Appareil de filtrage destiné à enlever les particules solides d'un flux gazeux, et comportant des éléments filtrants (11) suspendus et disposés dans des enveloppes filtrantes (16). Un ajutage (19, 20) monté dans l'axe central (31) peut pivoter pas à pas au-dessus de chaque élément filtrant (11) pour y souffler de l'air comprimé et nettoyer l'enveloppe filtrante (16). Afin d'augmenter le débit d'air à travers cette enveloppe (16), une embouchure (19) est placée en regard de l'ajutage (20) et comporte une amenée d'air supplémentaire venant s'ajouter à l'air provenant dudit ajutage (20). Les éléments filtrants (11) ont un fond qui réfléchit l'air, et leurs extrémités supérieures sont coniques (15) de manière à assurer un renflement et un nettoyage de ladite enveloppe filtrante (16). Cet appareil assure un nettoyage efficace du sac de filtrage tout en consommant moins d'air comprimé que les appareils connus.
PCT/DK1991/000181 1990-06-28 1991-06-28 Appareil de filtrage destine a enlever les particules d'un flux gazeux WO1992000134A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK1574/90 1990-06-28
DK157490A DK157490D0 (da) 1990-06-28 1990-06-28 Filteranlaeg til fjernelse af partikler fra gasstroemme

Publications (1)

Publication Number Publication Date
WO1992000134A1 true WO1992000134A1 (fr) 1992-01-09

Family

ID=8106198

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1991/000181 WO1992000134A1 (fr) 1990-06-28 1991-06-28 Appareil de filtrage destine a enlever les particules d'un flux gazeux

Country Status (3)

Country Link
AU (1) AU8053391A (fr)
DK (1) DK157490D0 (fr)
WO (1) WO1992000134A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5562251A (en) * 1993-09-03 1996-10-08 Goyen Controls & Co. Pty. Limited Gas nozzle for bag house cleaning systems
WO2009054021A1 (fr) * 2007-10-24 2009-04-30 S.E.I.C.O. Impianti S.R.L. Système pour régénérer des filtres d'une chambre de filtration pour des substances aériformes
WO2009156104A1 (fr) * 2008-06-25 2009-12-30 Enviroserv Gmbh Installations de filtration de gaz
CN115382308A (zh) * 2022-08-23 2022-11-25 曲靖阳光新能源股份有限公司 一种单晶炉用双孔放气过滤罐

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3487609A (en) * 1966-08-15 1970-01-06 Hart Carter Co Method and apparatus for filtering a gaseous medium
DE1619833A1 (de) * 1966-08-15 1970-09-17 Abboud Harry I Vorrichtung zum Abtrennen von Aerosolen aus Gasen
GB1596710A (en) * 1977-10-11 1981-08-26 Cea Carter Day Co Pulsed backflush air filter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3487609A (en) * 1966-08-15 1970-01-06 Hart Carter Co Method and apparatus for filtering a gaseous medium
DE1619833A1 (de) * 1966-08-15 1970-09-17 Abboud Harry I Vorrichtung zum Abtrennen von Aerosolen aus Gasen
GB1596710A (en) * 1977-10-11 1981-08-26 Cea Carter Day Co Pulsed backflush air filter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5562251A (en) * 1993-09-03 1996-10-08 Goyen Controls & Co. Pty. Limited Gas nozzle for bag house cleaning systems
US5887797A (en) * 1993-09-03 1999-03-30 Goyen Controls Co Pty Ltd Bag house cleaning systems
WO2009054021A1 (fr) * 2007-10-24 2009-04-30 S.E.I.C.O. Impianti S.R.L. Système pour régénérer des filtres d'une chambre de filtration pour des substances aériformes
WO2009156104A1 (fr) * 2008-06-25 2009-12-30 Enviroserv Gmbh Installations de filtration de gaz
CN115382308A (zh) * 2022-08-23 2022-11-25 曲靖阳光新能源股份有限公司 一种单晶炉用双孔放气过滤罐

Also Published As

Publication number Publication date
DK157490D0 (da) 1990-06-28
AU8053391A (en) 1992-01-23

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