WO2004071622A1 - A filter having inlet portion with diffuser elements - Google Patents
A filter having inlet portion with diffuser elements Download PDFInfo
- Publication number
- WO2004071622A1 WO2004071622A1 PCT/DK2004/000085 DK2004000085W WO2004071622A1 WO 2004071622 A1 WO2004071622 A1 WO 2004071622A1 DK 2004000085 W DK2004000085 W DK 2004000085W WO 2004071622 A1 WO2004071622 A1 WO 2004071622A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- filter
- air
- inlet portion
- dust
- flow
- Prior art date
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
- B01D46/0039—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices
- B01D46/0041—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices for feeding
- B01D46/0043—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices for feeding containing fixed gas displacement elements or cores
-
- 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
- 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
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
Definitions
- the invention relates to a filter comprising a filter housing with an essentially horizontal partition wall that divides the filter housing into a clean-air chamber and a dust chamber, said partition wall being provided with a number of openings in which a number of filter bags are arranged that are secured to the partition wall and extend down into the dust chamber; said filter being provided with an inlet portion in open communication with the dust chamber in a level that is above a lowermost end of the filter bags, wherein the inlet portion is configured for introducing a dust-containing flow of air to the dust chamber, from where it can be sucked up through the filter bags into the clean-air chamber, from where the filtered air is discharged through a clean- air outlet.
- Each of the filter bags typically comprises a wire frame on which a bag of a filter material is mounted. These filter bags are suspended from a horizontal partition wall down into a dust chamber, whereto the dust containing air is supplied and sucked upwards above the partition wall through the filter bags. Thereby the dust particles are deposited on the filter bags and drop down to the bottom of the filter housing from where they can be removed.
- the present invention relates to the type of filters where the dust containing air is supplied at a level that is level with the filter bags, ie at a level that is above the lowermost end of the filter bags.
- Filter types are known, where the air is supplied underneath the filter bags, but the present invention is not relevant in connection with these filter types.
- erroneous piping before the filter may cause increased wear on the filter bags due to the dust particles in the air also causing the filter bags to vibrate with an ensuing risk of breakdown.
- the inlet is to be dimensioned precisely in accordance with the plant in which the filter is to be used, both with regard to the cross sectional area of the inlet and with regard to whether it has to be a clockwise or a counter-clockwise inlet.
- the filter will not necessarily function optimally if, at a later stage, it is to be used for filtering a flow of air containing another product, or if a larger or smaller amount of air is used than was originally intended.
- there may be problems with the piping if the filter is to be moved to another process plant.
- the inlet portion has a cross sectional area that is increased in a direction towards the filter housing.
- At least a lower wall of the inlet portion has a downward slope in a direction towards the filter housing.
- the dust particles that have been completely braked by the diffuser elements and have dropped down within the inlet portion hit such sloping lower wall and are hence caused to travel onwards into the dust chamber in order to there drop to the bottom of the filter, from where they can be removed along with the remaining filtered-off material.
- These dust particles are conveyed forwards, on the one hand due to the sloping face, and, on the other, due to the air that flows across the face.
- the inlet portion is configured as a cone with increasing cross section in a direction towards the filter housing.
- the diffuser elements block at least an area corresponding to the smallest cross-sectional area of the inlet portion.
- the diffuser elements block at least an area corresponding to the smallest cross-sectional area of the inlet portion.
- the diffuser elements comprise a number of lamellae that extend transversally of the flow of air and are arranged offset in relation to each other, laterally as well as axially.
- lamellae constitute a comparatively inexpensive and efficient fractioning of the flow of air.
- the lamellae are configured to be convex against the flow of air.
- the air is conveyed towards the side walls of the inlet portion, whereby a distribution of the flow of air is accomplished that additionally contributes to keeping the side walls free from dust particles.
- the lamellae are carried by thin bars that extend transversally to the lamellae and are secured to the walls of the inlet portion.
- Such thin bars do not greatly affect the functioning of the lamellae as diffuser elements, and only small amounts of dust will be able to deposit thereon.
- Figure 1 is a cross sectional view, seen from the side, of a filter according to a preferred embodiment of the invention
- Figure 2 is a cross sectional view of the filter shown in Figure 1 , seen along the line ll-ll;
- Figure 3 shows a part of the filter shown in Figures 1 and 2, seen along the line Ill-Ill in Figure 2 (without filter bags).
- Figures 1-3 show various cross sections of a filter 1 according to a preferred embodiment of the invention.
- Figure 1 shows the entire filter 1 in a longitudinal view, from which it will appear that the filter 1 comprises a filter housing 2 that is provided with a horizontal partition wall 3 that divides the filter housing 2 into a clean-air chamber 4 and a dust chamber 5.
- the partition wall 3 is provided with a number of openings 6, wherein a number of filter bags 7 are arranged.
- the filter housing 2 is provided with an inlet portion 8 that is in open communication with the dust chamber 5 in level with the filter bags 7; ie in a level that is above the lowermost end 9 of the filter bags 7.
- the inlet portion 8 is connected to a supply pipe 10 that is, at the opposite end, in connection with a process unit that discharges dusty air to be filtered in the filter 1.
- the dusty flow of air is conveyed via the supply pipe 10 and the inlet portion 8 into the dust chamber 5. From here the air is sucked through the filter bags 7 into the clean-air chamber 4, from where the filtered air is discharged through a clean-air outlet 11. Some dust particles 12 drop immediately down to the bottom of the dust chamber 5, while others are deposited on the filter bags 7, from where they are removed at a later stage, eg by an oppositely directed flushing air being blown through the filter bags or by them being shaken (not shown), whereby they are caused to drop to the bottom of the dust chamber 5. From there they are removed via a dust particle outlet 13.
- the inlet portion 8 is configured differently than the known inlets for this type of filters, and in the following the characteristic features of the inlet portion 8 are described in further detail.
- the inlet portion 8 is configured as a cone with increasing cross section seen in a direction towards the filter housing 2.
- the inlet portion 8 has a smallest cross sectional area A (see Figure 3) which, in the shown example, corresponds to the cross sectional area of the supply pipe 10.
- a number of diffuser elements are provided in the form of five lamellae 14-16b that extend transversally of the inlet portion 8 and are carried by thin bars 17 that extend transversally of the lamellae 14- 16b and are secured to the walls of the inlet portion 8.
- the five lamellae 14- 16b have each their reference numeral, while the thin bars 17 (eg a total of nine as shown) have the same reference number for the sake of simplicity.
- the lamellae 14-16b are arranged such in the inlet portion 8 that they delimit at least an area corresponding to the smallest transversal area A of the inlet portion 8. This appears most clearly from Figure 3 and it is hereby ensured that no dust particles 12 can flow through the lamellae 14-16b and hit the filter bags 7 directly. From Figure 2 it will appear that the lamellae 14-16b are convex against the flow of air to the effect that they deflect the air outwards towards the walls of the inlet portion 8, whereby it is accomplished, on the one hand, that the air is distributed and, on the other, that the air flows along the wall and prevents dust particles from depositing there.
- the lamella 14 is arranged most proximate the supply pipe 10 and its location centrally of the inlet portion 8 causes the air to be forced upwards and downwards and laterally as outlined in Figures 1 and 2.
- the dust particles that are located centrally in the flow of air collide with the lamella 14 and are thereby efficiently slowed down.
- the air continues past the lamella 14 and reaches lamellae 15a and 15b. There the air is deflected further upwards, downwards and to the sides, and some dust particles collide with lamellae 15a, 15b and are slowed down efficiently.
- the flow rate of the air flow is also reduced when it reaches the inlet portion 8. This contributes further to ensuring that the air introduced into the dust chamber 5 will cause very little wear on the filter bags 7.
- a filter 1 configured in this manner can therefore easily be built into a process plant where there is not enough room for an elongate, rectilinear supply pipe as is a requirement of the known filters.
- the filter 1 can readily be used when products are changed or if the supplied amount of air is increased or reduced, since the inlet portion 8 is not dimensioned to match a specific type of product and amount of air to function optimally as is the case with the known helical inlets.
- the filter has a circular-cylindrical dust chamber 5, but the invention also lends itself for use in connection with a dust chamber having another configuration, eg rectangular.
- the inlet portion 8 is shown with a conical configuration, but it may have any other configuration, such as frustoconical or merely cylindrical without having an increased cross-section in a direction towards the filter housing. Nor does the inlet portion need to be oriented radially towards the filter housing; it may just as well be positioned askew in relation to the filter housing if so desired.
- the diffuser elements shown are lamellae 14-16b, but they may also be configured differently - the only condition being that they slow down the dust particles and prevent them from hitting directly on the filter elements from the supply pipe.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Prostheses (AREA)
- Oscillators With Electromechanical Resonators (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/545,167 US7563295B2 (en) | 2003-02-12 | 2004-02-05 | Filter having inlet portion with diffuser elements |
AT04708316T ATE452693T1 (en) | 2003-02-12 | 2004-02-05 | FILTER WITH INLET PART HAVING DIFFUSER ELEMENTS |
DE602004024763T DE602004024763D1 (en) | 2003-02-12 | 2004-02-05 | FILTER WITH DIFFUSER ELEMENTS |
EP04708316A EP1592491B1 (en) | 2003-02-12 | 2004-02-05 | A filter having inlet portion with diffuser elements |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DKPA200300214 | 2003-02-12 | ||
DK200300214A DK175107B1 (en) | 2003-02-12 | 2003-02-12 | Filter, for air cleaning, has inlet part with diffuser components and housing with horizontal separating wall dividing it into clean air chamber and dust chamber |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004071622A1 true WO2004071622A1 (en) | 2004-08-26 |
Family
ID=32337953
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DK2004/000085 WO2004071622A1 (en) | 2003-02-12 | 2004-02-05 | A filter having inlet portion with diffuser elements |
Country Status (7)
Country | Link |
---|---|
US (1) | US7563295B2 (en) |
EP (1) | EP1592491B1 (en) |
CN (1) | CN1758946A (en) |
AT (1) | ATE452693T1 (en) |
DE (1) | DE602004024763D1 (en) |
DK (1) | DK175107B1 (en) |
WO (1) | WO2004071622A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100748133B1 (en) | 2006-09-29 | 2007-08-10 | 주식회사 포스코 | Baghouse with optimized perforated plate for reducing partial damage of bag filter |
WO2014152549A1 (en) * | 2013-03-15 | 2014-09-25 | Bilfinger Water Technologies, Inc. | Diffuser basket |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9254458B2 (en) | 2006-08-21 | 2016-02-09 | Simatek A/S | Filter inlet |
EP2056953B1 (en) | 2006-08-21 | 2013-06-05 | Simatek A/S | A filter inlet |
CN101505852B (en) * | 2006-11-06 | 2013-03-27 | 三菱重工业株式会社 | Dust collector |
US7998253B2 (en) * | 2007-07-19 | 2011-08-16 | Menardi-Mikropul Llc | Airflow reducing and redirecting arrangement for industrial baghouse |
DE102007056852A1 (en) * | 2007-11-26 | 2009-05-28 | GM Global Technology Operations, Inc., Detroit | Optimized rib geometry in an air filter box for water separation, flow distribution and housing stiffening |
KR101267522B1 (en) | 2011-04-22 | 2013-05-28 | 주식회사 엠지엠이엔지 | Baffle apparatus for dust collector |
DE102011054940A1 (en) * | 2011-10-28 | 2013-05-02 | Esta Apparatebau Gmbh & Co Kg | Suction system, has guide plate guiding suction volume flow to larger part corresponding to formation and direction of guide plate and further guiding flow to smaller part by through-flow openings radially to middle part of process unit |
CN103111113B (en) * | 2012-12-29 | 2016-01-13 | 成都易态科技有限公司 | Filter feed liquor pressure-equalizing device |
US9108136B2 (en) * | 2013-02-13 | 2015-08-18 | Camfil Usa, Inc. | Dust collector with spark arrester |
US20140360362A1 (en) * | 2013-06-06 | 2014-12-11 | General Electric Company | Method and systems for particle separation in an exhaust gas recirculation system |
EP3650104A1 (en) | 2014-10-22 | 2020-05-13 | Aireau Qualite Controle Inc. | Dust collector having vertical filters and a filter carriage |
DE102016118806A1 (en) * | 2015-12-21 | 2017-06-22 | Vorwerk & Co. Interholding Gmbh | Vacuum cleaner as well as system of a vacuum cleaner and a base station |
US20210131733A1 (en) * | 2016-12-22 | 2021-05-06 | Gea Process Engineering A/S | Powder drying system with improved inlet arrangement to the filter unit and method of operating the filter unit of such a system |
CN107754537A (en) * | 2017-11-25 | 2018-03-06 | 韩梅 | Bag-type dust environmental protection equipment for industrial gasses |
CN112973296A (en) * | 2021-03-24 | 2021-06-18 | 单西芳 | Dust collecting equipment with filter high rigidity raise dust |
CN117205689B (en) * | 2023-10-31 | 2024-05-07 | 腾跃环保设备(泗县)有限责任公司 | Cloth bag dust remover |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3831354A (en) * | 1972-02-14 | 1974-08-27 | Slick Corp | Dust collector including diffuser assembly |
DE3805718A1 (en) | 1988-02-24 | 1989-09-07 | Krantz H Gmbh & Co | Filter for purifying a gas |
US5069691A (en) * | 1990-11-14 | 1991-12-03 | Abatement Technologies | Portable filtration unit |
US5846300A (en) * | 1994-01-10 | 1998-12-08 | Lurgi (Australia) Pty Limited | Fabric filter with gas inlet geometry and method |
WO2001003808A1 (en) | 1999-07-09 | 2001-01-18 | Simatek A/S | A filter bag and an air filter device |
Family Cites Families (9)
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US3395518A (en) * | 1966-12-28 | 1968-08-06 | United States Steel Corp | Air filter with traveling filter-medium screen |
US3726066A (en) * | 1970-12-14 | 1973-04-10 | Wheelabrator Frye Inc | Dust collector |
US4384874A (en) * | 1981-04-10 | 1983-05-24 | Dattilo Donald P | Dust control apparatus with cleaning control circuit |
US4655804A (en) * | 1985-12-11 | 1987-04-07 | Environmental Elements Corp. | Hopper gas distribution system |
US5030261A (en) * | 1988-02-12 | 1991-07-09 | Giambattista Giusti | Two stage transition input section for dust collectors |
US4836834A (en) * | 1988-04-29 | 1989-06-06 | Dynamic Air Inc. | Air filter with back flow cleaning |
US20030041729A1 (en) * | 1999-12-29 | 2003-03-06 | Finigan Justin J. | Method and apparatus for cleaning filter bags of bag houses |
AU2003226735B2 (en) * | 2002-03-26 | 2008-01-10 | Air Products And Chemicals, Inc. | Filter assembly comprising filter elements and a filter grid |
KR100379215B1 (en) * | 2002-04-30 | 2003-04-08 | 주식회사공영엔지니어링 | dust collector using single body-type filter box mixing circle filter box and quadrangle filter box |
-
2003
- 2003-02-12 DK DK200300214A patent/DK175107B1/en not_active IP Right Cessation
-
2004
- 2004-02-05 AT AT04708316T patent/ATE452693T1/en not_active IP Right Cessation
- 2004-02-05 EP EP04708316A patent/EP1592491B1/en not_active Expired - Lifetime
- 2004-02-05 US US10/545,167 patent/US7563295B2/en active Active
- 2004-02-05 CN CNA2004800068070A patent/CN1758946A/en active Pending
- 2004-02-05 WO PCT/DK2004/000085 patent/WO2004071622A1/en active Application Filing
- 2004-02-05 DE DE602004024763T patent/DE602004024763D1/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3831354A (en) * | 1972-02-14 | 1974-08-27 | Slick Corp | Dust collector including diffuser assembly |
DE3805718A1 (en) | 1988-02-24 | 1989-09-07 | Krantz H Gmbh & Co | Filter for purifying a gas |
US5069691A (en) * | 1990-11-14 | 1991-12-03 | Abatement Technologies | Portable filtration unit |
US5069691B1 (en) * | 1990-11-14 | 1993-04-27 | Travis Terrell | |
US5069691B2 (en) * | 1990-11-14 | 1996-11-05 | Abatement Technologies | Portable filtration unit |
US5846300A (en) * | 1994-01-10 | 1998-12-08 | Lurgi (Australia) Pty Limited | Fabric filter with gas inlet geometry and method |
WO2001003808A1 (en) | 1999-07-09 | 2001-01-18 | Simatek A/S | A filter bag and an air filter device |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100748133B1 (en) | 2006-09-29 | 2007-08-10 | 주식회사 포스코 | Baghouse with optimized perforated plate for reducing partial damage of bag filter |
WO2014152549A1 (en) * | 2013-03-15 | 2014-09-25 | Bilfinger Water Technologies, Inc. | Diffuser basket |
US9827513B2 (en) | 2013-03-15 | 2017-11-28 | Aqseptence Group, Inc. | Diffuser basket |
Also Published As
Publication number | Publication date |
---|---|
CN1758946A (en) | 2006-04-12 |
US20060112666A1 (en) | 2006-06-01 |
EP1592491B1 (en) | 2009-12-23 |
DE602004024763D1 (en) | 2010-02-04 |
US7563295B2 (en) | 2009-07-21 |
DK175107B1 (en) | 2004-06-01 |
ATE452693T1 (en) | 2010-01-15 |
EP1592491A1 (en) | 2005-11-09 |
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