US3398511A - Sealing means for band filters - Google Patents

Sealing means for band filters Download PDF

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Publication number
US3398511A
US3398511A US561562A US56156266A US3398511A US 3398511 A US3398511 A US 3398511A US 561562 A US561562 A US 561562A US 56156266 A US56156266 A US 56156266A US 3398511 A US3398511 A US 3398511A
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US
United States
Prior art keywords
band
pressure
filter
inner space
space
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.)
Expired - Lifetime
Application number
US561562A
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English (en)
Inventor
Gustavsson Karl Axel Goran
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.)
SNA Europe Industries AB
Original Assignee
Bahco AB
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 Bahco AB filed Critical Bahco AB
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Publication of US3398511A publication Critical patent/US3398511A/en
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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
    • B01D46/18—Particle separators, e.g. dust precipitators, using filtering belts

Definitions

  • the constant flow of air from the high pressure channeloutwardly to the outer space and inwardly t-o the inner space around the band eflectively forms a seal by preventing the entry .of uncleaued air into the inner space from which the clean air is withdrawn.
  • the air within the high pressure channel can be supplied by connection to the atmosphere.
  • This invention relates to an arrangement for band filters including an endless travelling filter band arrangedin a housing in'such a manner that'it' divides an outer" space between the band and the housing for supplying of raw gas from an inner space lying between the opposite runs of the band; the inner space receiving the gas cleaned after its passage through the band, and the edge portions of the band abutting against side parts defining the inner space to insure passage of all of the gas through the filter.
  • the critical side parts that perform the sealing function so as to comprise three parallel plate walls spaced from each other and positioned at right angles to the surface of the band.
  • the two outermost walls form a channel in which a pressure is maintained higher than the pressure prevailing in the raw gas or uncleaued air space outside the band and the two inner walls form a second channel connected to the inner space within the band in which due to the fall of pressure on passage through the hand there prevails a pressure lower than the pressure prevailing in the raw gas space, whereby the band is held tightly against the side part.
  • FIGURE 1 is a fragmentary sectional view in perspective showing the band filter according to the invention.
  • FIGURE 2 is an enlarged fragmentary view in perspective of the lower part of the band filter, the housing of the filter being omitted and some parts being in section to show more clearly the essential details of the invention.
  • FIGURE 3 is a sectional view taken on the line III-II of FIGURES l and 2.
  • the band filter is arranged in a housing 1 having an inlet opening Z-and an outlet opening 3 for the medium to be cleaned in the filter.
  • the filter comprises a filter band 4 either manufactured as an endless band or as a web, the ends of which are joined together to form a continuous band.
  • the filter band is stretched by means of rolls 5 and 6, the roll 5 also serving to drive or eifect the movement of the band4 by means of a suitable electrical motor 8 via a belt transmission 7.
  • the lower roll 6 has a smaller diameter than the roll 5 and is resiliently movable in the longitudinal direction with respect to the filterband 4 by mounting of its ends so as to be spring-loaded by a spring9 pressing down the r0116, thus insuring the stretching of the band.
  • the roll 6 there is a further roll 10 with the same diameter as the upper roll 5 and which forms a tightening or sealing roll to confine the inner space together with said upper roll 5 and the side parts of the invention lying betwen the rolls 5 and 10, which parts cooperate with the edge portions of the filter band.
  • the inner space 11 is thereby separated from the outer space or raw gas space 12 formed between the runs of theband 4 and the housing 1.
  • a number of support rolls 13 which prevent the runs of the band from being pressed together and which rolls are freely journalled in the side parts. These rolls 13 are preferably manufactured in the form of screw springs as shown.
  • each of the side parts comprises three parallel plate walls 14, 15, 16
  • the two outermost walls form a channel 17 in which a pressure is maintained higher than the pressure prevailing in the raw gas space 12, and of course, is also higher than the pressure in the inner space 11, because as already pointed out in the introduction, the pressure in said inner space 11 is lower than the pressure in said raw gas space 12 due to the inherent pressure loss as the air passes through the filter band 4.
  • the high pressure channel 17 is connected to a suitable source of pressure via the connection piece 18, shown in FIGURE 1.
  • a second or low pressure channel 19 connected to the inner space 11 via a number of openings 20 in the innermost wall 16.
  • edges are bent at right angles.
  • the edges of the outer walls 14 and 15 are bent towards each other to form a blow slot and the edge of the inner wall 16 is bent towards the wall 15 to form a suction slot.
  • an air stream is continuously flowing between the edge portions of the band 4 and the outermost wall 14 from the channel 17 to the raw gas space, whereby it efiectively prevents raw or uncleaued gas from flowing into the inner space 11 without having passed through the band 4.
  • an air stream is passing from the channel 17 to low pressure channel 19 thereby reducing the friction between the band and the middle wall 15 (note flow arrows in FIGURE 3).
  • the filter band 4 is held tight in guided relationship against the bent ed e of the wall 16.
  • the space 21 lying beneath the tightening roll 10 and between the band parts is connected via a tube branch 22 to a source of air under pressure in such a manner that an air stream is caused to pass through the band filter 4 from the inner to the outer sides to clean or blow out the separated dust particles adhering to the band, the dust para 3 ticles being removed through an outlet opening 23 at the lower end of the housing 1.
  • the edges of the same are guided by a guideway 24 surrounding the outer edges.
  • connection piece 18 may be open to the atmosphere, as shown in FIGURE 1.
  • a band filter arrangement including a housing, spaced stretching means positioned in said housing, a continuous filter band mounted on said stretching means defining a pair of oppositely directed runs, said band defining separate inner and outer spaces within said housing, first means for supplying gas to be processed to said outer space, means for withdrawing the processed gas from said inner space, the improvement comprising first and second spaced plate members extending longitudinally along each side of said hand between said stretching means, said members having a width so as to extend substantially between said runs and being substantially perpendicular to said band and parallel to each other to form a first elongated channel along each side second means for supplying gas to said channel at a pressure higher than the pressure in said outer space, said band filter being sufliciently flow restrictive to cause the pressure in said inner space to be lower than said pressure in said outer space to create a differential in pressure across said band, means in said inner space to hold said band against said plate members and to guide said band along said runs to prevent the same from collapsing due to said diiferential in pressure, whereby
  • said guiding and holding means includes a third plate member spaced from and substantially parallel to and coextensive with the innermost one of said plate members so as to form a suction slot, the operative edges of said third plate member being bent toward said first and second plate members so as to form a guide and seal with said filter band.
  • said guiding and holding means comprises a third plate member substantially parallel to and coextensive with said first and second plate members and cooperating with the innermost one of said plate members to form a second elongated channel, means for interconnecting said second channel with the remainder of said inner space so as to form a suction slot, whereby said remainder of said inner space is separated from said high pressure channel by said second channel.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
US561562A 1965-07-02 1966-06-29 Sealing means for band filters Expired - Lifetime US3398511A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE881565 1965-07-02

Publications (1)

Publication Number Publication Date
US3398511A true US3398511A (en) 1968-08-27

Family

ID=20275089

Family Applications (1)

Application Number Title Priority Date Filing Date
US561562A Expired - Lifetime US3398511A (en) 1965-07-02 1966-06-29 Sealing means for band filters

Country Status (7)

Country Link
US (1) US3398511A (en, 2012)
BE (1) BE683423A (en, 2012)
DE (1) DE1507772B1 (en, 2012)
DK (1) DK113260B (en, 2012)
FI (1) FI41707C (en, 2012)
GB (1) GB1079699A (en, 2012)
NO (1) NO115200B (en, 2012)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080041025A1 (en) * 2006-08-17 2008-02-21 Boyer Eugene C HVAC system with moving filter
US20170097166A1 (en) * 2015-10-05 2017-04-06 Matthew Morris Evaporative cooling device
US9855523B2 (en) * 2015-12-10 2018-01-02 Chieh-Yuan Cheng Smoke filter
CN119656837A (zh) * 2024-12-31 2025-03-21 安徽红园化纤科技有限公司 一种化学纤维废气处理装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113559636B (zh) * 2021-08-13 2022-07-15 盐城市龙盛空调设备有限公司 蜂窝式除尘器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2431143A (en) * 1943-08-26 1947-11-18 Lummus Co Fibrous catalyst system
US2752003A (en) * 1953-05-22 1956-06-26 Jr Henry J Hersey Filter with continuous web filter medium
US2867324A (en) * 1956-03-12 1959-01-06 Hirs Gene Filter apparatus
US2881861A (en) * 1957-02-18 1959-04-14 American Air Filter Co Air flow seal for air filter having an expansible-contractible air cleaning web
US3127256A (en) * 1964-03-31 Gas clba

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE491593C (de) * 1930-02-12 Fraembs & Freudenberg Abdichtung fuer Filtertrommeln nach Patent 425542 durch am Trommelkranz angebrachte Schaufeln
US1949002A (en) * 1932-03-15 1934-02-27 Emmett F Annis Self-cleaning dust collector
US2850113A (en) * 1955-07-11 1958-09-02 Koppers Co Inc Air filter
FR1207441A (fr) * 1958-04-15 1960-02-16 Filtre rotatif

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3127256A (en) * 1964-03-31 Gas clba
US2431143A (en) * 1943-08-26 1947-11-18 Lummus Co Fibrous catalyst system
US2752003A (en) * 1953-05-22 1956-06-26 Jr Henry J Hersey Filter with continuous web filter medium
US2867324A (en) * 1956-03-12 1959-01-06 Hirs Gene Filter apparatus
US2881861A (en) * 1957-02-18 1959-04-14 American Air Filter Co Air flow seal for air filter having an expansible-contractible air cleaning web

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080041025A1 (en) * 2006-08-17 2008-02-21 Boyer Eugene C HVAC system with moving filter
US7608121B2 (en) * 2006-08-17 2009-10-27 Delphi Technologies, Inc. HVAC system with moving filter
US20170097166A1 (en) * 2015-10-05 2017-04-06 Matthew Morris Evaporative cooling device
US10422540B2 (en) * 2015-10-05 2019-09-24 Matthew Morris Evaporative cooling device and control system
US20200011552A1 (en) * 2015-10-05 2020-01-09 Matthew Morris Evaporative cooling device and control system
US11137154B2 (en) * 2015-10-05 2021-10-05 Matthew Morris Evaporative cooling device and control system
US9855523B2 (en) * 2015-12-10 2018-01-02 Chieh-Yuan Cheng Smoke filter
CN119656837A (zh) * 2024-12-31 2025-03-21 安徽红园化纤科技有限公司 一种化学纤维废气处理装置

Also Published As

Publication number Publication date
NO115200B (en, 2012) 1968-08-26
FI41707C (fi) 1970-01-12
BE683423A (en, 2012) 1966-12-01
DK113260B (da) 1969-03-03
FI41707B (en, 2012) 1969-09-30
DE1507772B1 (de) 1970-10-29
GB1079699A (en) 1967-08-16

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