WO2013141518A1 - Supporting cage for a bag filter - Google Patents

Supporting cage for a bag filter Download PDF

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Publication number
WO2013141518A1
WO2013141518A1 PCT/KR2013/002024 KR2013002024W WO2013141518A1 WO 2013141518 A1 WO2013141518 A1 WO 2013141518A1 KR 2013002024 W KR2013002024 W KR 2013002024W WO 2013141518 A1 WO2013141518 A1 WO 2013141518A1
Authority
WO
WIPO (PCT)
Prior art keywords
supporting cage
bag filter
hollow cylindrical
cylindrical section
accordance
Prior art date
Application number
PCT/KR2013/002024
Other languages
English (en)
French (fr)
Inventor
Peter Kleine-Mollhoff
Rene Poss
Andreas Tillmann
Original Assignee
Alantum
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 Alantum filed Critical Alantum
Priority to CN201380015990.XA priority Critical patent/CN104203375B/zh
Publication of WO2013141518A1 publication Critical patent/WO2013141518A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/88—Handling or mounting catalysts
    • 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
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • 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
    • B01D46/06—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material with means keeping the working surfaces flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8678—Removing components of undefined structure
    • B01D53/8687—Organic components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/702—Hydrocarbons
    • B01D2257/7027—Aromatic hydrocarbons

Definitions

  • the present invention relates to a supporting cage for a bag filter.
  • Supporting cages for bag filters are generally known and are used, for example, during industrial filtration or on the purification of exhaust gas of garbage incineration plants or power plants.
  • FIG. 1 An exemplary supporting cage of known kind is shown in Fig. 1.
  • This supporting cage 110 comprises a hollow cylindrical section 112 which is formed from a wire mesh 114.
  • the wire mesh 114 is welded to a receiver 116 which serves for the connection of the supporting cage 110 to a filter head plate of an exhaust gas purification plant (not shown).
  • a non-shown bag filter made from a textile filter material is drawn over the wire mesh 114.
  • the wire mesh is flowed through from the outside to the interior by a dust-loaded exhaust gas, with dust particles accumulating at the outer side of the bag filter and forming a filter cake.
  • the filter cake can be cleaned off by a temporary application of pressurized air at the bag filter.
  • the bag filter is slightly widened in the inverse flow direction by an impulse of pressurized air, so that the bag filter is lifted from the wire mesh 114 and discharges the filter cake.
  • the bag filter is subjected to an alternating load during its cleaning due to the impulse of pressurized air, which leads to a fatigue of the filter material and finally to a failure of the filter material. This is contributed to in a negative manner because the bag filter only lies at the wire mesh 114 point-wise and/or line-wise.
  • dioxins and furans are removed from exhaust gas in that a mixture of active carbon or hearth furnace coke and calcium hydroxide or sodium bicarbonate are added to the exhaust gas before the bag filter.
  • the mixture e.g. of active carbon and sodium bicarbonate
  • the mixture loaded with dioxins or furans is discharged by the bag filter and is e.g. used as mining waste filler.
  • the problem of contamination is merely displaced from the air to a solid in a disadvantageous manner on the use of a very large effort in material and cost.
  • the exhaust gas can flow through a ceramic honeycomb body for catalytic purification, wherein a large catalyst surface and thus a voluminous catalyst is required for an ideal material transfer.
  • a catalyst is generally switched upstream or downstream of the particle filtration in exhaust gas purification plants which disadvantageously leads to larger and more complex exhaust gas purification plants.
  • the supporting cage in accordance with the invention is characterized by an open pore metal foam which comprises a catalytic coating.
  • the use of metallic foam for the manufacture of the supporting cage is found to be advantageous in as far as the metal foam is flowed through by the exhaust gas in a turbulent manner, so that comparatively little catalyst is required for the destruction of e.g. dioxins and/or furans.
  • the catalytically coated metal foam can be manufactured and processed cost effectively and it possesses a lower exhaust gas counter pressure in comparison to ceramic honeycomb bodies.
  • the supporting cage in accordance with the invention is particularly suitable in plants which require a catalytic exhaust gas purification, e.g. in garbage incineration plants, power plants, clinker kilns, melting plants, such as e.g. copper melting plants, foundries or sinter belt plants. Moreover, it is suitable for the reduction of nitrogen oxide on the use of ammonia or as a NH3 slack brake in the SNCR method (Selective Non-Catalytic Reduction).
  • the temperatures at which the exhaust gas purification takes place typically lie in a range of 200°C to 250°C, the metal foam however, also withstands temperatures of up to 1000°C.
  • the supporting cage simultaneously enables a particle filtration in combination with a bag filter.
  • the supporting cage satisfies a double function in this case in that it serves as a support for the bag filter, on the one hand, and serves for the exhaust gas purification, on the other hand.
  • the pre-switching and/or post-switching of particle filtration, on the one hand, and exhaust gas purification, on the other hand, can thus be omitted.
  • the supporting cage in accordance with the invention finally also contributes to a cost reduction and material saving.
  • the supporting cage comprises a hollow cylindrical section whose wall is formed at least regionally from at least one open pore metal foam having a catalytic coating.
  • the wall of the hollow cylindrical section is completely made from at least one open pore metal foam having a catalytic coating.
  • the hollow cylindrical section is characterized in this manner by a maximum support surface for a bag filter, whereby the bag filter is significantly less loaded on contact with the supporting cage than for a point-like contact at a wire mesh. The lifetime of the bag filter is significantly increased in this manner.
  • the bag filter can be manufactured from a thin material. Both finally result in a material saving and a cost saving.
  • the wall of the hollow cylindrical section is formed from a plurality of open pore metal foams, wherein at least a metal foam has a catalytic coating.
  • different metal foams e.g. metal foams of different alloys and/or with different pore sizes and/or with different catalytic coatings, can be combined in the wall of the supporting cages.
  • higher contaminant concentrations can still be effectively filtered and/or reduced by a multi-layered design.
  • the hollow cylindrical section of the supporting cage is advantageously covered by a bag filter, in particular by a textile bag filter, through which the dust particles can be filtered from an exhaust gas flow flowing through the supporting cage.
  • a bag filter in particular by a textile bag filter, through which the dust particles can be filtered from an exhaust gas flow flowing through the supporting cage.
  • the supporting cage can comprise a receiver, by means of which the supporting cage can be fastened in an exhaust gas purification plant.
  • a receiver by means of which the supporting cage can be fastened in an exhaust gas purification plant.
  • the connection between the hollow cylindrical section and the receiver can, for example, take place by a mechanical joining (e.g. clamping); however, also other methods such as e.g. welding are conceivable.
  • Fig. 1 a schematic side view of the supporting cage in accordance with the state of the art
  • Fig. 2 a schematic side view of a supporting cage in accordance with the invention.
  • FIG. 2 A supporting cage 10 in accordance with the invention is illustrated in Fig. 2 which has a hollow cylindrical section 12.
  • the hollow cylindrical section 12 is completely formed from an open pore metal foam 14, so that it can be flowed by a gas through in a turbulent manner with a minimum counter pressure.
  • the wall of the hollow cylindrical section 12 is formed by a layer of the metal foam 14.
  • the wall of the hollow cylindrical section 12 is formed by a layer of the metal foam 14.
  • the hollow cylindrical section 12 comprises a hollow cylindrical tube element with windows formed therein into which a metallic foam can respectively be installed.
  • the metal foam 14 is provided with a suitable catalytic coating in dependence on the application and indeed not only at its outer surface, but also at its inner surfaces in order to ensure the degradation of contaminants of an exhaust gas to be purified.
  • the coating can be an oxidation catalyst which serves for the destruction of dioxins and/or furans in garbage incineration.
  • the supporting cage 10 is covered by a bag filter (not shown) e.g. of a textile filter material, which additionally ensures a particle filtration, this means that dust particles are removed from an exhaust gas to be purified.
  • the bag filter lies at the metal foam 14 of the hollow cylindrical section 12 during the filter operation, whereby it experiences a minimal mechanical loading during its operation.
  • the bag filter can be inflated by an impulse of pressurized air directed outwardly through the metal foam 14 from the inside and can be lifted slightly from the hollow cylindrical section 12 in order to discharge filter cake formed from dust particles at the bag filter.
  • the supporting cage 10 moreover comprises a receiver 16 which is arranged at an axial end of the hollow cylindrical section 12 and serves for the attachment of the supporting cage 10 at a filter head plate (not shown) of an exhaust gas purification plant.
  • the receiver 16 can, for example, be connected to the hollow cylindrical section 12 by mechanical joining, in particular by clamping or can be welded to this.
  • the supporting cage is flowed through by the exhaust gas to be purified from the outside towards the interior, wherein the bag filter ensures a dust removal from the exhaust gas and the catalytic coating brings about a detoxification of the exhaust gas.
  • a filter cake accumulating at the outer side of the bag filter and composed of accumulated dust particles can be thrown off by a reversal of the flow direction and a temporary inflation of the bag filter and can be collected in a collection container present beneath the supporting cage and can be disposed of.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Filtering Materials (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Catalysts (AREA)
PCT/KR2013/002024 2012-03-23 2013-03-13 Supporting cage for a bag filter WO2013141518A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201380015990.XA CN104203375B (zh) 2012-03-23 2013-03-13 用于袋滤器的支承构架

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012005957.4 2012-03-23
DE201210005957 DE102012005957A1 (de) 2012-03-23 2012-03-23 Stützkorb für einen Schlauchfilter

Publications (1)

Publication Number Publication Date
WO2013141518A1 true WO2013141518A1 (en) 2013-09-26

Family

ID=49111961

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2013/002024 WO2013141518A1 (en) 2012-03-23 2013-03-13 Supporting cage for a bag filter

Country Status (3)

Country Link
CN (1) CN104203375B (zh)
DE (1) DE102012005957A1 (zh)
WO (1) WO2013141518A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014011678A1 (de) * 2014-08-05 2016-02-11 Bwf Tec Gmbh & Co. Kg Filterkerzenelement mit Metallschaumverstärkung
CN113731047A (zh) * 2021-08-16 2021-12-03 中科三清科技有限公司 一种烟气脱硫脱硝除尘一体化装置及其处理工艺

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001009225A (ja) * 1999-06-25 2001-01-16 Mitsubishi Heavy Ind Ltd バグフィルタ及びそれに用いるリテーナ
KR20020087148A (ko) * 2001-05-14 2002-11-22 박병억 집진기의 필터백 리테이너
EP0979133B1 (en) * 1997-11-14 2003-04-02 Albany International Corp. A modular filter bag cage
JP2005261989A (ja) * 2004-02-17 2005-09-29 Nippon Spindle Mfg Co Ltd バグフィルタ用ケージ
US20100223895A1 (en) * 2007-09-28 2010-09-09 Peshina William F Wire cage for a filter bag

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19612578C2 (de) * 1996-03-29 1998-11-05 Buehler Ag Filter und Filterkorbbefestigung
JP3959093B2 (ja) * 2004-12-27 2007-08-15 伸興産業株式会社 バグフィルタ用リテーナ
KR101174113B1 (ko) * 2010-05-20 2012-08-14 주식회사 알란텀 매연 저감 장치용 메탈 폼 필터

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0979133B1 (en) * 1997-11-14 2003-04-02 Albany International Corp. A modular filter bag cage
JP2001009225A (ja) * 1999-06-25 2001-01-16 Mitsubishi Heavy Ind Ltd バグフィルタ及びそれに用いるリテーナ
KR20020087148A (ko) * 2001-05-14 2002-11-22 박병억 집진기의 필터백 리테이너
JP2005261989A (ja) * 2004-02-17 2005-09-29 Nippon Spindle Mfg Co Ltd バグフィルタ用ケージ
US20100223895A1 (en) * 2007-09-28 2010-09-09 Peshina William F Wire cage for a filter bag

Also Published As

Publication number Publication date
CN104203375B (zh) 2017-06-13
DE102012005957A1 (de) 2013-09-26
CN104203375A (zh) 2014-12-10

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