US3581901A - Filter conveyor band for a continuously operating filter press - Google Patents

Filter conveyor band for a continuously operating filter press Download PDF

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Publication number
US3581901A
US3581901A US838296A US3581901DA US3581901A US 3581901 A US3581901 A US 3581901A US 838296 A US838296 A US 838296A US 3581901D A US3581901D A US 3581901DA US 3581901 A US3581901 A US 3581901A
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US
United States
Prior art keywords
ribs
band
filter
link
conveyor band
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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
US838296A
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English (en)
Inventor
Hans Gujer
Karl Koller
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Individual
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Individual
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Publication date
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Publication of US3581901A publication Critical patent/US3581901A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/24—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using an endless pressing band
    • B30B9/247—Pressing band constructions
    • 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
    • B01D33/333—Filters with filtering elements which move during the filtering operation with individual filtering elements moving along a closed path

Definitions

  • a filter conveyor band or belt for a continuously operating filter press preferably of the vertical type, which includes hingedly interconnected links having drainage grooves extending longitudinally of the link with the forward ends of the grooves being open and means being provided to close the rearward ends of the grooves.
  • the means that close the rear ends of the grooves including a rear surface as regards the direction of movement that is inclined correspondingly to the inclination of the forward ends of the ribs so that such forward ends of the ribs of a trailing link cooperate with such rear surface of a preceding link to be in at least approximately adjoining relation with such rear surface when the band is straight and to define a gap which narrows in the direction away from the tops of the ribs when the band is curved.
  • the invention relates to a filter conveyor band for a continuously operating filter press having links hingedly joined with one another and including flowoff, discharge or drainage means.
  • the object of this invention is to obviate the aforementioned drawbacks and to create a filter conveyor band which will ensure perfect withdrawal of the liquid from the filter surface.
  • the filter conveyor band of this invention is characterized such that each link of the band is equipped with drainage grooves representing the flowoff means which are separated by longitudinal ribs and which when viewed in the conveying direction, are closed off at their rear and which in the forward area are opened forwardly and toward the rear side of the link, with the forward ends of the longitudinal separating ribs being included forwardly and away from the filter surface, so that these ribs cooperate with a cleat or strip at the rear of the preceding link member, said cleat or strip extending transversely in relation to the direction of movement of the band, said cleat or strip being correspondingly inclined, and where said cooperation takes place in such manner that the forward ends of the ribs, with the filter conveyor band being stretched, at least approximately adjoin said cleat or strip, so as to form slots when the filter conveyor band curves with such slots narrowing away from the filter surface.
  • the drainage grooves extending in conveying direction enable perfect withdrawal of the liquid from the filter surface.
  • This liquid when viewed in conveying direction, can flow off at the forward end of one link toward the rear side of the preceding link.
  • the filter conveyor bands in a filter press are arranged vertically, the withdrawal of the liquid from the lower end of a link is aided by the cleat or strip of each respective preceding link, said cleat or strip having an inclination which slants forwardly and away from the filter surface, in that the liquid is additionally deflected onto the rear side of the respective preceding link.
  • the slanted inclination of the forward ends of the ribs separate the drainage grooves as well as of the rearward cleat or strip of the preceding link making it also possible to perfectly withdraw the liquid from the filter surface after completion of the pressing operation and at the lower end of the press cavity since the capillary action between the forward ends of the ribs and the rearward strip of the preceding link retain the pressed out liquid and drain it off the filter surface. This action is above all, also present when the filter conveyor band is deflected into a curve from its stretched condition.
  • the forward ends of the ribs and the rearward cleat or strip of the immediately preceding link form slots which narrow in the direction away from the filter surface,
  • the narrowing preferably extends to such an extent that the ends of the slots possess a capillary action.
  • FIG. 1 is a fragmentary top plan view illustrating a link of the filter band or belt in accordance with the teaching of this invention
  • FIG. 2 is a longitudinal cross-sectional view taken along line 11-11 of FIG. 1;
  • FIG. 3 is a fragmentary longitudinal cross-sectional view illustrating two adjacent and connected links as they appear when the filter band or belt is in straight condition;
  • FIG. 4 is a similar view illustrating the links as they appear when the filter band or belt is curved.
  • FIGS. 1 and 2 illustrate a link of the filter conveyor band or belt which is equipped with drainage grooves 1.
  • the individual drainage grooves are separated from one another by ribs 2.
  • the ends 3 of the drainage grooves that are the rear ends as regards the direction of movement, are closed off by a strip or web 5 which is inclined forwardly and away from filter surface 4.
  • the forward ends 6 of the drainage grooves are open forwardly and towards the rear side of the link.
  • the forward ends 7 of ribs 2 are likewise inclined forwardly and away from conveying surface 4, withthis inclination corresponding to that of strip 5.
  • An opening 8 is provided at the rear end of the link, with this opening penetrating ribs 2 and reaching into drainage grooves 1.
  • the opening 8 which is disposed transversely in relation to the conveying direction, provides for aerating the drainage grooves so that no subatmospheric pressure can form in the latter.
  • the link is equipped with eyelets 9 and 10 which are offset relatively to one another and serve to connect the individual links with one another.
  • these eyelets serve as teeth which cooperate with a drive or guide chain wheel or sprocket means, respectively, of a filter press.
  • longitudinally extending support strips 11, that serve on the one hand for reinforcing the link and on the other hand for holding a supporting device in a filter press.
  • the links of the filter conveyor band consist preferably of plastic.
  • Polyoxymethylene known commercially as Delrin has proven to be particularly useful.
  • the mode of operation of a filter conveyor band or belt disposed in a vertical filter press or tower is as follows:
  • Two filter conveyor bands together form a downwardly narrowing filter press cavity and are covered with a filter cloth at filter surface.
  • the filter conveyor band travels downwardly, thereby pressing out the pressed matter.
  • the extracted liquid enters into drainage grooves l and fiows off downwardly until it meets the rear surface of web or strip 5 of the preceding link.
  • the liquid is deflected onto the rearward side of the link and can emerge rearwardly through the opening of the grooves.
  • the filter conveyor bands are deflected and thereby release the filter cake.
  • the links are constructed such that they form a slot during deflection, such slot being formed between forward ends 7 of the ribs of each rearward or trailing link and the rear surface of strip of the preceding link. This slot narrows in the direction extending away from the plane of filter surface 4.
  • the capillary force is produced in the slot at the side facing away from the filter surface, said capillary force drawing off rearwardly even the last drop of liquid from the filter surface.
  • a filter conveyor band for a continuously operating press including a plurality of hingedly interconnected links, each link comprising a body having drainage grooves extending in the direction of movement of the band, means closing the rear end of each groove, each groove being open at its forward end, ribs extending longitudinally of the body and separating said grooves, said ribs including a forward end, that is inclined forwardly of and away from the plane of the tops of said ribs, and the means closing the rear end of each groove having a rear surface as regards the direction of movement of said band that is inclined correspondingly to the inclination of the forward end of the said ribs whereby said forward ends of said ribs cooperate with said rear surface so as to at least approximately adjoin such rear surface when the band is in straight condition and to define a gap which narrows in a direction away from the tops of said ribs when the band is in curved condition.
  • a filter conveyor band as claimed in claim 1 and said links consisting of plastic material.
  • a filter conveyor band as claimed in claim 4 and said plastic material consisting of polyoxymethylene.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtration Of Liquid (AREA)
  • Treatment Of Sludge (AREA)
  • Filtering Materials (AREA)
US838296A 1968-07-02 1969-07-01 Filter conveyor band for a continuously operating filter press Expired - Lifetime US3581901A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH984768A CH476508A (de) 1968-07-02 1968-07-02 Filtertragband für eine kontinuierlich arbeitende Filterpresse

Publications (1)

Publication Number Publication Date
US3581901A true US3581901A (en) 1971-06-01

Family

ID=4356309

Family Applications (1)

Application Number Title Priority Date Filing Date
US838296A Expired - Lifetime US3581901A (en) 1968-07-02 1969-07-01 Filter conveyor band for a continuously operating filter press

Country Status (12)

Country Link
US (1) US3581901A (enrdf_load_stackoverflow)
AT (1) AT291298B (enrdf_load_stackoverflow)
BE (1) BE735470A (enrdf_load_stackoverflow)
CH (1) CH476508A (enrdf_load_stackoverflow)
DE (2) DE1933623A1 (enrdf_load_stackoverflow)
DK (1) DK128517B (enrdf_load_stackoverflow)
FI (1) FI49908C (enrdf_load_stackoverflow)
FR (1) FR2012165A1 (enrdf_load_stackoverflow)
GB (1) GB1263354A (enrdf_load_stackoverflow)
NL (1) NL6910067A (enrdf_load_stackoverflow)
NO (1) NO125081B (enrdf_load_stackoverflow)
SE (1) SE344411B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3687295A (en) * 1969-11-25 1972-08-29 Hans Gujer Filter conveyor band for a continuously operating filter press
WO2015082059A1 (de) * 2013-12-03 2015-06-11 Johannes Bohnert Pressvorrichtung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3910464A1 (de) * 1989-03-31 1990-10-04 E & M Maschbau Gmbh Abscheidevorrichtung, insbesondere fuer klaeranlagen
CA2020973A1 (en) * 1990-07-11 1992-01-12 Helmut Etschel Separating apparatus, in particular for sewage clarification plants

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3453951A (en) * 1966-12-12 1969-07-08 Neil Malarkey Jr Filtering means for filter press

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3453951A (en) * 1966-12-12 1969-07-08 Neil Malarkey Jr Filtering means for filter press

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3687295A (en) * 1969-11-25 1972-08-29 Hans Gujer Filter conveyor band for a continuously operating filter press
WO2015082059A1 (de) * 2013-12-03 2015-06-11 Johannes Bohnert Pressvorrichtung
US10766219B2 (en) 2013-12-03 2020-09-08 Johannes Bohnert Pressing device

Also Published As

Publication number Publication date
DK128517B (da) 1974-05-20
NO125081B (enrdf_load_stackoverflow) 1972-07-17
FR2012165A1 (enrdf_load_stackoverflow) 1970-03-13
FI49908C (fi) 1975-11-10
CH476508A (de) 1969-08-15
FI49908B (enrdf_load_stackoverflow) 1975-07-31
AT291298B (de) 1971-07-12
SE344411B (enrdf_load_stackoverflow) 1972-04-17
GB1263354A (en) 1972-02-09
DE6926232U (de) 1969-10-30
BE735470A (enrdf_load_stackoverflow) 1969-12-16
NL6910067A (enrdf_load_stackoverflow) 1970-01-06
DE1933623A1 (de) 1970-01-29

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