FR2315304A1 - Drying sewage sludge by natural drainage and pressure straining - on two conveyor screens of successively finer perforations - Google Patents

Drying sewage sludge by natural drainage and pressure straining - on two conveyor screens of successively finer perforations

Info

Publication number
FR2315304A1
FR2315304A1 FR7520055A FR7520055A FR2315304A1 FR 2315304 A1 FR2315304 A1 FR 2315304A1 FR 7520055 A FR7520055 A FR 7520055A FR 7520055 A FR7520055 A FR 7520055A FR 2315304 A1 FR2315304 A1 FR 2315304A1
Authority
FR
France
Prior art keywords
sludge
perforations
straining
pref
screen
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.)
Granted
Application number
FR7520055A
Other languages
French (fr)
Other versions
FR2315304B1 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7520055A priority Critical patent/FR2315304A1/en
Publication of FR2315304A1 publication Critical patent/FR2315304A1/en
Application granted granted Critical
Publication of FR2315304B1 publication Critical patent/FR2315304B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0012—Settling tanks making use of filters, e.g. by floating layers of particulate material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
    • B01D21/0042—Baffles or guide plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/02—Settling tanks with single outlets for the separated liquid
    • B01D21/08—Settling tanks with single outlets for the separated liquid provided with flocculating compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2427—The feed or discharge opening located at a distant position from the side walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/245—Discharge mechanisms for the sediments
    • B01D21/2461—Positive-displacement pumps; Screw feeders; Trough conveyors
    • 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
    • B01D33/09—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration with surface cells independently connected to pressure distributors
    • 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
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
    • B01D33/466—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element scrapers
    • 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
    • B30B9/20—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 rotary pressing members, other than worms or screws, e.g. rollers, rings, discs
    • 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
    • B30B9/241—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 co-operating with a drum or roller

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The sludge is passed between an advancing strainer screen, such as a perforated conveyor band or rotary drum, and a pressing element such as a conveyor band which progressively approaches the strainer screen. Two separate strainer screens are now used in succession, the first serving to drain the sludge naturally, or at very light pressure, and the second on which the pre-drained sludge is pressed to extract further moisture. The two strainer screens are pref. of different mesh sizes, the first screen pref. having perforations of the order of 400 to 1500 microns while the second has perforations of the order of 80 to 600 microns. The liner speeds of the two screens are pref different and independently variable. Sludge supplied to the first screen is pref. delivered directly from a sepg. decanter with provision for continuous introduction of a flocculating agent. Used for straining out the moisture from sludge, partic. sewage sludge. Highly efficient, compact installation because large perforations are used in a preliminary straining stage and then fine perforations for high pressure straining. Linear speed of advance through each stage is set to achieve optimum straining efficiency.
FR7520055A 1975-06-26 1975-06-26 Drying sewage sludge by natural drainage and pressure straining - on two conveyor screens of successively finer perforations Granted FR2315304A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7520055A FR2315304A1 (en) 1975-06-26 1975-06-26 Drying sewage sludge by natural drainage and pressure straining - on two conveyor screens of successively finer perforations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7520055A FR2315304A1 (en) 1975-06-26 1975-06-26 Drying sewage sludge by natural drainage and pressure straining - on two conveyor screens of successively finer perforations

Publications (2)

Publication Number Publication Date
FR2315304A1 true FR2315304A1 (en) 1977-01-21
FR2315304B1 FR2315304B1 (en) 1980-06-27

Family

ID=9157090

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7520055A Granted FR2315304A1 (en) 1975-06-26 1975-06-26 Drying sewage sludge by natural drainage and pressure straining - on two conveyor screens of successively finer perforations

Country Status (1)

Country Link
FR (1) FR2315304A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0126655A2 (en) * 1983-05-24 1984-11-28 Dorr-Oliver Incorporated Vacuum expressor device for rotary drum filter
FR2597362A1 (en) * 1986-04-22 1987-10-23 Guinard Oil Services METHOD AND INSTALLATION FOR SEPARATING THE CONSTITUENTS OF A SUSPENSION.
US20110274807A1 (en) * 2010-05-10 2011-11-10 Robin Haber Elastomeric multi-function squeezer/strainer device
US20110274801A1 (en) * 2010-05-10 2011-11-10 Robin Haber Elastomeric multi-function squeezer/strainer device
IT201900004285A1 (en) * 2019-03-25 2020-09-25 Acqua & Sole S R L MACHINERY FOR THE SOLID-LIQUID SEPARATION OF THE ORGANIC FRACTION ARISING FROM THE SEPARATE COLLECTION OF MUNICIPAL WASTE BY PRESSING

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0126655A2 (en) * 1983-05-24 1984-11-28 Dorr-Oliver Incorporated Vacuum expressor device for rotary drum filter
EP0126655A3 (en) * 1983-05-24 1986-06-18 Dorr-Oliver Incorporated Vacuum expressor device for rotary drum filter
FR2597362A1 (en) * 1986-04-22 1987-10-23 Guinard Oil Services METHOD AND INSTALLATION FOR SEPARATING THE CONSTITUENTS OF A SUSPENSION.
EP0243243A2 (en) * 1986-04-22 1987-10-28 Guinard Oil Services Process and apparatus for separating constituent parts from a suspension
EP0243243A3 (en) * 1986-04-22 1988-01-07 Guinard Oil Services Process and apparatus for separating constituent parts from a suspension
US4810393A (en) * 1986-04-22 1989-03-07 Guinard Oil Services Process for the separation of the constituents of a suspension
US20110274807A1 (en) * 2010-05-10 2011-11-10 Robin Haber Elastomeric multi-function squeezer/strainer device
US20110274801A1 (en) * 2010-05-10 2011-11-10 Robin Haber Elastomeric multi-function squeezer/strainer device
IT201900004285A1 (en) * 2019-03-25 2020-09-25 Acqua & Sole S R L MACHINERY FOR THE SOLID-LIQUID SEPARATION OF THE ORGANIC FRACTION ARISING FROM THE SEPARATE COLLECTION OF MUNICIPAL WASTE BY PRESSING

Also Published As

Publication number Publication date
FR2315304B1 (en) 1980-06-27

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse