GB755243A - Improvements in or relating to filters - Google Patents

Improvements in or relating to filters

Info

Publication number
GB755243A
GB755243A GB4539/54A GB453954A GB755243A GB 755243 A GB755243 A GB 755243A GB 4539/54 A GB4539/54 A GB 4539/54A GB 453954 A GB453954 A GB 453954A GB 755243 A GB755243 A GB 755243A
Authority
GB
United Kingdom
Prior art keywords
unit
filtrate
units
air
impervious
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
Application number
GB4539/54A
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.)
Infilco Inc
Original Assignee
Infilco 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 Infilco Inc filed Critical Infilco Inc
Publication of GB755243A publication Critical patent/GB755243A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/44—Edge filtering elements, i.e. using contiguous impervious surfaces
    • B01D29/48—Edge filtering elements, i.e. using contiguous impervious surfaces of spirally or helically wound bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/04—Supports for the filtering elements
    • B01D2201/043—Filter tubes connected to plates
    • B01D2201/0438—Filter tubes connected to plates mounted substantially vertically on plates at the lower side of the filter elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D37/00—Processes of filtration
    • B01D37/02—Precoating the filter medium; Addition of filter aids to the liquid being filtered

Abstract

755,243. Filters. INFILCO, Inc. Feb. 16, 1954 [Feb. 16, 1953], No. 4539/54. Class 46. Liquid to be filtered is introduced at 21, Fig. 1, through a valve 19 and filters through filter aid material deposited on the pervious lower portion 34 of each of a number of filter units 30<SP>1</SP>, 302. Air is trapped in the top portion 12 of a casing 10 by introduction of the liquid, and the passage of filtrate into the units 301, 30<SP>2</SP>. causes air to be trapped in an impervious, upper portion 33 of each unit. Filtrate from the outer units 30<SP>2</SP> passes by pipes 45 into a central unit 301, the lower end of which has an outlet port 37 and fits in a socket 35 on an outlet pipe 25. When backwashing of the units is necessary an air release valve 28 (preferably quickacting) is opened, the "release air " hitherto trapped under the top portion 12 thereby escaping, and the " operating air " trapped in the upper impervious portion of each filter unit thereupon expanding and driving filtrate back through the pervious portion at high velocity. The filter cake is thereby broken off and the unit.interstices cleaned. Compressed air is then admitted at 29 to maintain the solids in suspension during discharge of the dirty liquid through a drain valve 23. In Fig. 3 (not shown), the pervious and impervious parts of each filter unit are made separately but clamped together in use. Withdrawal of filtrate may be by means of an upper header 56, Fig. 4, which also supports the weight of the units and communicates with each by a conduit 55 extending through the " operating air " space. In this arrangement the filtrate may be withdrawn from the outer units downwards through the central unit instead of from all units through the conduit 25b as shown. Each unit may in every case comprise two or more sections 60, 61, Fig. 5, each section comprising an upper impervious portion 33c and a lower pervious portion 34c, each section except the uppermost communicating with the one above it for discharge of filtrate by a pipe 62, and the filtrate from the compound unit being withdrawn at 45c. In Fig. 8, each unit may comprise a cylindrical element 30f, Fig. 11, including an open-bottomed "release air" trap 762 extending substantially the length of the unit. This trap may be omitted, in which case the impervious portion 33e of the cylindrical wall extends nearly half-way down on each side of the vertical. Specification 524,385 is referred to.
GB4539/54A 1953-02-16 1954-02-16 Improvements in or relating to filters Expired GB755243A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US755243XA 1953-02-16 1953-02-16

Publications (1)

Publication Number Publication Date
GB755243A true GB755243A (en) 1956-08-22

Family

ID=22126333

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4539/54A Expired GB755243A (en) 1953-02-16 1954-02-16 Improvements in or relating to filters

Country Status (1)

Country Link
GB (1) GB755243A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4874533A (en) * 1986-03-25 1989-10-17 Boze Ronald A Apparatus and process for filtering fluids
US4943379A (en) * 1987-09-14 1990-07-24 Boze Ronald A Apparatus and process for filtering fluids
US6607661B2 (en) 1999-11-11 2003-08-19 Parker Hannifin Oy Filtering apparatus
US6627079B2 (en) * 1999-11-11 2003-09-30 Parker Hannifin Oy Apparatus for filtering a liquid

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4874533A (en) * 1986-03-25 1989-10-17 Boze Ronald A Apparatus and process for filtering fluids
US4943379A (en) * 1987-09-14 1990-07-24 Boze Ronald A Apparatus and process for filtering fluids
US6607661B2 (en) 1999-11-11 2003-08-19 Parker Hannifin Oy Filtering apparatus
US6627079B2 (en) * 1999-11-11 2003-09-30 Parker Hannifin Oy Apparatus for filtering a liquid

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