IL40179A - Method of and apparatus for clarifying a contaminated liquid - Google Patents

Method of and apparatus for clarifying a contaminated liquid

Info

Publication number
IL40179A
IL40179A IL40179A IL4017972A IL40179A IL 40179 A IL40179 A IL 40179A IL 40179 A IL40179 A IL 40179A IL 4017972 A IL4017972 A IL 4017972A IL 40179 A IL40179 A IL 40179A
Authority
IL
Israel
Prior art keywords
liquid
contaminants
filter
primary filter
primary
Prior art date
Application number
IL40179A
Other versions
IL40179A0 (en
Original Assignee
Idrex
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 Idrex filed Critical Idrex
Publication of IL40179A0 publication Critical patent/IL40179A0/en
Publication of IL40179A publication Critical patent/IL40179A/en

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
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/94—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes
    • 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
    • B01D29/39—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 hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type
    • B01D29/41—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 hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type mounted transversely on the tube
    • 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
    • B01D29/56—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 series 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
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6407—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes
    • B01D29/6415—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes with a rotary movement with respect to the filtering element
    • 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
    • B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
    • B01D29/80—Handling the filter cake in the filter for purposes other than for regenerating for drying
    • B01D29/84—Handling the filter cake in the filter for purposes other than for regenerating for drying by gases or by heating
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)
  • Extraction Or Liquid Replacement (AREA)

Claims (39)

V 40179/2 WHAT WE CLAIM IS:
1. A method of filtering a contaminated liquid comprising the steps of passing said contaminated liquid through a primary filter having a layer of filter aid on the elements thereof, thereby removing the contaminants from said liquid and discharging the . liquid filtered thereby into a discharge outlet, automatically interrupting the discharge of the filtered liquid in. response to. the predetermined accumulation of contaminants on the primary filter elements, removing the accumulated contaminants from the primary filter elements into the contaminated liquid, passing the liquid bearing the contaminants through a secondary filter to accumulate the contaminants thereon and discharging the liquid filtered thereby into a chamber, interrupting the passage of liquid through the secondary filter, adding a quantity of said filter aid to the filtered liquid passed into the chamber and recirculating the filter aid bearing liquid through the primary filter to re-coat the filtering elements thereof and passing further contaminated liquid through said primary filter, and exposing the collected contaminants to heat for facilitating the disposal thereof. 40179/2
2. A method according to Claim 1 wherein the step of removing the accumulated contaminants from the primary filter into the contaminated liquid includes brushing the outer surface of the filtering elements thereof to remove filter cake formed thereon.
3. A method according to Claim 2 wherein the step of I. brushing the outer surface of said filtering elements is effected by moving the surface thereof past a stationary brushing means. i - I : . ' j . ' '
4. A-method- according -to Claim 2 or 3 and including the step of gravitationally separating the accumulated contaminants removed from said secondary filter from the liquid in the desludging chamber. j
5. A method according to Claim 4 and further including ·: conveying said gravitationally separated contaminants to a j position removed from said secondary filter. I · I · .
6. A method according to Claim 1 or any preceding claim dependent thereon wherein the step of exposing the collected contaminants to heat for' facilitating the disposal thereof comprises conveying said contaminants upwardly through a heating station to expose said contaminants to heat and gravitationally remove a portion of liquid conveyed therewith. ·. . . · 40179/2
7. A method according to Claim 1 wherein the conveyance of said contaminants through the heating means is periodically interrupted to facilitate removal of liquid conveyed therewith.
8. A method in accordance with Claim 1 or any preceding claim dependent thereon wherein the collected contaminants are exposed to heat sufficient to boil the contaminant bearing liquid from the secondary filter thereby separating the liquid from the contaminants.
9. A method according to any preceding claim wherein the step of interrupting the discharge of filtered liquid to the discharge outlet in response to the accumulation of a predetermined level of contaminants on the primary filter elements is effected in response to the sensing of a predetermined pressure drop through the primary filter.
10. A method according to any preceding claim and further including adding a quantity of filter aid to the liquid passed from the primary filter to the secondary filter to facilitate accumulation of the contaminants and expended filter aid by the secondary filter means.
11. A method according to any preceding claim wherein the step of passing the liquid bearing the accumulated contaminants through the secondary filter to accumulate the ( 40179/2 contaminants thereon and discharging the liquid filtered thereby into the chamber, includes withdrawing said liquid into the chamber by means of a vacuum pump.
12. A method according to any preceding claim wherein the step of adding a quantity of filter aid to the liquid passed into the chamber and recirculating the filter aid bearing liquid through the primary filter to re-coat the filtering elements thereof continues until substantially all of said filter forming aid is removed from the liquid to the primary filte elements.
13. A method according to Claim 1 or any preceding claim dependent thereon wherein the step of exposing the collected contaminants to heat comprises forming a plug of said contaminants during the upward conveying to gravitationally remove a portion of the liquid conveyed therewith.
14. A method according to Claim 13 wherein the step of forming a plug of contaminants during the upward conveying comprises forming a series of contaminant plugs to squeeze a portion of the. liquid from the contaminant solids.
15. A method according to Claim 13 wherein the step of forming a plug of contaminants during the upward, conveying includes preventing liquid below the plug from risin to a ν·. 40179/2 ' ' I
16. A method according to Claim 13 wherein the step of forming a plug of contaminants during the upward conveying includes squeezing the plug of contaminants to remove liquid therefrom.
17. A method according to Claim 14 wherein the step of forming a series of contaminant plugs to separate a portion of the suspended contaminants from the. liquid—comprises squeezing the uppermost plug of contaminants to remove liquid therefrom.
18.. .A. me-tho-d-according to Claim 13 wherein the upward conveyance of said contaminants through a heating station is periodically interrupted to facilitate removal of liquid conveyed therewith.
19. A method in accordance with any preceding claim comprising the additional steps of interrupting the discharge of filtered liquid from the primary filter adding a second quantity of filter aid to the filtered liquid drawn from the primary filter, circulating said liquid bearing the second quantity of filter aid through the filtering elements of the primary filter to form a new filter aid coating thereon and clarifying the liquid by removing substantially all of the filter aid from the liquid to the said filtering elements resuming the passing of contaminated liquid through said primary filter to be filtered thereby arid dischanging the filtered liquid to the discharge outlet upon the formation 40179/2
20. Liquid-filtering apparatus including means for passing contaminated liquid through a primary filter having a filte aid coating on the elements thereof to remove the contaminants therefrom and for discharging the filtered liquid into a discharge outlet, automatic means responsive to the predetermined accumulation of contaminants on the primary filter elements for interrupting the discharge of the filtered liquid, means for removing the accumulated contaminants from the filtering elements of the primary filter iirto. the. contaminated liquid., means for passing the liquid bearing the contaminants through a secondary filter to accumulate the contaminants thereon and for passing the liquid filtered thereby into a chamber, means operable to interrupt the passage of liquid through said secondary filter, means for adding a quantity of filter aid to the filtered liquid in said chamber and for recirculating the filter aid bearing liquid through the primary filter to renew the filter aid coating on the filtering elements thereof, means operable during the renewing of the filter aid coating on the filtering elements of the primary filter for removing and collecting the accumulated contaminants from the filtering elements on the secondary filter, and means for exposing the accumulated contaminants to heat for facilitating the disposal thereof.
21. Apparatus according to Claim 20 wherein said primary and secondary filters each comprise a plurality of filtering elements in the form of coaxial hollow discs having an outer mesh surface forming a septum for support of a filter cake.
22. Apparatus according to Claim 20 or 21 responsive means includes a pressure sensitive switch actuable in response to the increase in pressure required to pass contaminated fluid through said primary filter.
23. Apparatus according to any of Claims 20 to 22 wherein the means for removing the contaminants accumulated by the filtering elements of the primary filter comprise brush means positioned in contact therewith for -mechanically separating the contaminants therefrom.
24. Apparatus according to any of Claims 20 -to 23 wherein said means for adding a predetermined quantity of filter aid comprises a container for holding a quantity of filter aid scraper means carried within said container and movable through the contents contained therein to prevent agglomerating of the filter aid, and an auger rotatably carried within said container to remove a predetermined quantity of the filter aid in response to the rotation thereof.
25. Apparatus according to any one of Claims 20 to 24 and further including means actuable subsequent to the interruption of liquid passing through said secondary filter to remove the filter cake from the filter elements thereof. 40179/2
26. Apparatus according to any of Claims 20 to 25 and further including means for removing from said secondary filter the contaminants from said primary filter accumulated thereon.
27. Apparatus according to Claim 26 and further including means to collect the accumulant removed from said secondary filter elements and conveying said accumulant from the secondary filter-. ' · . . '■
28. Apparatus according to Claim 27 and further including heating means for thermally contacting the conveyed accumulants to remove a portion of liquid conveyed therewith..
29. Apparatus according to Claim 28 wherein said heating means is arranged to heat the conveyed accumulants to the boilin point of the liquid conveyed therewith.
30. Apparatus according to Claim 28 or 29 wherein said heating means for thermally contacting said conveyed accumulants includes a heated vertical auger.
31. Apparatus according to Claim 30 wherein said heated vertical auger has a portion of the auger flite removed to accumulate heated sludge thereby forming a sludge plug. !
32. Apparatus according to Claim 30 wherein said heated vertical auger has a plurality of auger flite portions removed to form a series of accumulated sludge plugs.
33. Apparatus according to Claim 30 wherein the heated portion of said vertical auger extends at least from a point below the bottom outlet of the secondary filter container to at least a poin±_above said container.
34. Apparatus according to Claim 30 wherein the heated portion of said vertical auger extends upwardly at least from a point below the bottom outlet of the desludge chamber secondary filter . container.
35. .35. Apparatus according to Claim 30 wherein the heated I vertical auger is enclosed by a plurality of selectivel actuable heating means to control the temperature thereof.
36. Apparatus according to Claim 35 wherein said plurality! of selectively actuable heating means comprise steam jackets. !
37. Apparatus according to Claim 35 and further including deflector means carried by said auger to remove the sludge therefrom.
38. , Liquid-clarifying apparatus substantially as described with reference to the accompanying drawings.
39. A method of clarifying a contaminated liquid substantially as described with reference to the accompanying drawings. the Applicants REINHOLD COHN AND PARTNERS
IL40179A 1971-08-23 1972-08-22 Method of and apparatus for clarifying a contaminated liquid IL40179A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US17377771A 1971-08-23 1971-08-23
US23951972A 1972-03-30 1972-03-30

Publications (2)

Publication Number Publication Date
IL40179A0 IL40179A0 (en) 1972-10-29
IL40179A true IL40179A (en) 1976-04-30

Family

ID=26869521

Family Applications (1)

Application Number Title Priority Date Filing Date
IL40179A IL40179A (en) 1971-08-23 1972-08-22 Method of and apparatus for clarifying a contaminated liquid

Country Status (7)

Country Link
JP (1) JPS5627284B2 (en)
BE (1) BE787918A (en)
CA (1) CA989745A (en)
DE (1) DE2241385C2 (en)
FR (1) FR2150442A1 (en)
IL (1) IL40179A (en)
IT (1) IT962185B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2645854A1 (en) * 1976-10-11 1978-04-13 Idrex Filter with vertically spaced horizontal filter elements - whose cakes are dried sequentially with compressed air
JPS5753211A (en) * 1980-09-17 1982-03-30 Nippon Enbairo Kogyo Kk Pressure filtering machine and solid-liquid separation method using said pressure filtering machine
JPS5753212A (en) * 1980-09-17 1982-03-30 Nippon Enbairo Kogyo Kk Pressure filtering machine and solid-liquid separation method using said pressure filtering machine
JPH062202B2 (en) * 1985-03-28 1994-01-12 月島機械株式会社 Filtration concentrator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3497452A (en) * 1968-09-09 1970-02-24 Kostas Savas Arvanitakis Method and apparatus for clarifying a liquid

Also Published As

Publication number Publication date
FR2150442B1 (en) 1976-10-29
DE2241385A1 (en) 1973-03-08
FR2150442A1 (en) 1973-04-06
JPS4875458A (en) 1973-10-11
IL40179A0 (en) 1972-10-29
DE2241385C2 (en) 1982-06-24
CA989745A (en) 1976-05-25
AU4588872A (en) 1974-02-28
BE787918A (en) 1972-12-18
JPS5627284B2 (en) 1981-06-24
IT962185B (en) 1973-12-20

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