US3347389A - Drum filter - Google Patents

Drum filter Download PDF

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Publication number
US3347389A
US3347389A US486163A US48616365A US3347389A US 3347389 A US3347389 A US 3347389A US 486163 A US486163 A US 486163A US 48616365 A US48616365 A US 48616365A US 3347389 A US3347389 A US 3347389A
Authority
US
United States
Prior art keywords
drum
annular
belt
resilient
edges
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
US486163A
Other languages
English (en)
Inventor
John E Krynski
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.)
Ametek Inc
Original Assignee
Ametek Inc
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 Ametek Inc filed Critical Ametek Inc
Priority to US486163A priority Critical patent/US3347389A/en
Priority to NL666610682A priority patent/NL146714B/xx
Application granted granted Critical
Publication of US3347389A publication Critical patent/US3347389A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/044—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are pervious for filtering
    • B01D33/048—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are pervious for filtering with endless filtering bands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/056—Construction of filtering bands or supporting belts, e.g. devices for centering, mounting or sealing the filtering bands or the supporting belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
    • B01D33/073—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration

Definitions

  • This invention relates to drum filters which employ cloth belt filtering media, and particularly to an improved drum filter of this type in which belt alignment is maintained while shrinkage, stretching and wrinkling of the cloth belt are minimized.
  • the principal object of the invention is to provide a drum filter in which the belt medium is maintained in alignment while shrinkage, stretching and wrinkling are reduced to a minimum without employing auxiliary tracking equipment.
  • Another object of the invention is to provide such a filter in which the belt medium is held onto the drum by a drawstring arrangement in combination with resilient means surrounding both edges of the drum to provide a seal preventing the escape of solids in the filtrate from the side edges of the drum.
  • a drum type filter may comprise a drum having trunnions that are journaled for rotation in aligned bearings at the top of standards for supporting the drum.
  • the drum may comprise peripheral pockets, each connected by radial ducts that lead along the axis of the drum to a valve means that provides a subatmospheric pressure to the tubes.
  • the periphery of the drum may be provided with pockets that are formed by axially extending, peripherally spaced bars that extend between peripherally extending ring elements at each end of the drum.
  • a perforated sheet surrounding the exterior of the drum and resting on the ring means to which it is attached.
  • the ring means may take a form having dovetail cross section that is open.
  • a resilient insert may be located within the outermost dovetail ring element, and it may fill the open dovetail and extend radially a distance beyond the ring.
  • the ring may include an axially extending flange forming a pocket with the side of the ring at the outermost edge of the drum.
  • the resilient insert may extend about the flange and include a hollow, annular portion within the pocket formed by the flange and ring side.
  • a cloth filtering medium wider than the drum, may be employed in belt fashion to surround a substantial portion of the drum and to pass over idle and discharge rolls.
  • the belt may include a seam along its edge, through which a resilient cable extends that is drawn tight enough to cause the belt to wrap around the edges of the drum and to compress the hollow, annular portion of the resilient insert at each end of the drum.
  • FIG. 1 is an end elevational view, parts being broken away, of a drum filter to which the principles of the invention have been applied;
  • FIG. 2 is a view looking in the direction of the arrows along line 22 of FIG. 1.
  • a drum filter including a hollow drum 10 having end walls 11 from which trunnions 12 extend that are journaled in aligned bearings 13 atop standards 14.
  • the drum 11 may comprise an impervious peripheral shell 15 having axially extending, peripherally spaced elements 16 forming pockets 17 therebetween.
  • the outer edges of elements 16 may support a perforated shell 18.
  • ring means 19 which in the embodiment disclosed is shown as two rings 20, 21, each having an open dovetail cross sectional construction.
  • the pockets 17 are formed by the axial elements 16 abutting the rings 20, and the perforated shell 18 extends over ring 20 but short of ring 21.
  • Rings 20, 21 may include flanges 22, 23 that extend parallel to shell 15.
  • a resilient, annular member 24 preferably made of a soft rubber may include a portion 25 that fills the hollow dovetail of ring 21 and which extends radially therebeyond.
  • Member 24 may include a portion 26 that wraps around the flange 23 of ring 21 and is connected to a hollow annular portion 27 that lies between the flange 23, the surface 15 and the outer wall of ring 21.
  • the annular space 28 within portion 27 provides a degree of resilience for a purpose to be described.
  • a cloth belt 29 that is substantially wider than drum 10 is wrapped around a substantial portion thereof and passes over a roll 30 as well as a breakup roll 31 that causes the collected solids to be discharged from belt 29 and to fall into a hopper 32 (FIG. 1).
  • the width of belt 29 is such that it provides an overhanging portion 33 at each end of dmm 10. Its edges include a seam 34 through which a resilient drawstring or cord 35 is threaded.
  • the arrangement is such that the overhanging portions 33 compress the resilient, hollow annular portion 27 of member 24, providing a seal thereby preventing the loss of material past the ends of drum 10.
  • This sealing arrangement provides a wide seal area extending from the edge of perforated plate 18 along the top of the portion 26 and around the portion 27 to at least its midpoint.
  • a drum filter comprising a drum mounted for rotation about a horizontal axis; a discharge roll mounted for rotation about an axis parallel with said drum axis; channel-shaped annular means fixed to said drum inwardly of the edges thereof, said annular means including flange means parallel with and spaced from the periphery of said drum and forming an annular recess about each edge of said drum; a resilient annular member Within said channel-shaped annular means, extending radially therebeyond, said resilient member extending around said flange means, and extending axially beyond the end of said flange means; an endless cloth belt having a width transversely substantially greater than the width of said drum and roll and having its edges overhanging freely from the edges of said drum, said edges of said belt including seam means therealong; and a resilient tensioning means in said seam means of less length than said belt, whereby said overhanging edges of said belt are drawn radially inwardly in contact with the resilient annular member along a substantial surface area parallel

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)
US486163A 1965-09-09 1965-09-09 Drum filter Expired - Lifetime US3347389A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US486163A US3347389A (en) 1965-09-09 1965-09-09 Drum filter
NL666610682A NL146714B (nl) 1965-09-09 1966-07-28 Trommelfilter.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US486163A US3347389A (en) 1965-09-09 1965-09-09 Drum filter

Publications (1)

Publication Number Publication Date
US3347389A true US3347389A (en) 1967-10-17

Family

ID=23930854

Family Applications (1)

Application Number Title Priority Date Filing Date
US486163A Expired - Lifetime US3347389A (en) 1965-09-09 1965-09-09 Drum filter

Country Status (2)

Country Link
US (1) US3347389A (US20100223739A1-20100909-C00005.png)
NL (1) NL146714B (US20100223739A1-20100909-C00005.png)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4483770A (en) * 1982-09-27 1984-11-20 Enviro-Clear Company, Inc. Fluid film bearing for use in horizontal belt vacuum filters
US4673514A (en) * 1982-09-27 1987-06-16 Enviro-Clear Company, Inc. Fluid film bearing for use in horizontal belt vacuum filters

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2204928A (en) * 1938-05-31 1940-06-18 Oliver United Filters Inc Locking device
US2710693A (en) * 1952-04-22 1955-06-14 Texas Co Continuous filter drum construction
US3017997A (en) * 1960-03-21 1962-01-23 Komline Sanderson Eng Corp Endless belt and drum type vacuum filter
US3143502A (en) * 1960-09-26 1964-08-04 Ametek Inc Filter
US3144409A (en) * 1960-10-04 1964-08-11 Ametek Inc Filter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2204928A (en) * 1938-05-31 1940-06-18 Oliver United Filters Inc Locking device
US2710693A (en) * 1952-04-22 1955-06-14 Texas Co Continuous filter drum construction
US3017997A (en) * 1960-03-21 1962-01-23 Komline Sanderson Eng Corp Endless belt and drum type vacuum filter
US3143502A (en) * 1960-09-26 1964-08-04 Ametek Inc Filter
US3144409A (en) * 1960-10-04 1964-08-11 Ametek Inc Filter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4483770A (en) * 1982-09-27 1984-11-20 Enviro-Clear Company, Inc. Fluid film bearing for use in horizontal belt vacuum filters
US4673514A (en) * 1982-09-27 1987-06-16 Enviro-Clear Company, Inc. Fluid film bearing for use in horizontal belt vacuum filters

Also Published As

Publication number Publication date
NL146714B (nl) 1975-08-15
NL6610682A (US20100223739A1-20100909-C00005.png) 1967-03-10

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