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GB786807A - Improvements in rotary scraper apparatus for sedimentation tanks - Google Patents

Improvements in rotary scraper apparatus for sedimentation tanks

Info

Publication number
GB786807A
GB786807A GB21657/55A GB2165755A GB786807A GB 786807 A GB786807 A GB 786807A GB 21657/55 A GB21657/55 A GB 21657/55A GB 2165755 A GB2165755 A GB 2165755A GB 786807 A GB786807 A GB 786807A
Authority
GB
United Kingdom
Prior art keywords
scrapers
lattice
tank
arms
crossbridge
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
GB21657/55A
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 GB21657/55A priority Critical patent/GB786807A/en
Publication of GB786807A publication Critical patent/GB786807A/en
Expired 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
    • B01D21/02—Settling tanks with single outlets for the separated liquid
    • B01D21/04—Settling tanks with single outlets for the separated liquid with moving scrapers
    • B01D21/06—Settling tanks with single outlets for the separated liquid with moving scrapers with rotating scrapers
    • 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
    • B01D21/18—Construction of the scrapers or the driving mechanisms for settling tanks
    • 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
    • B01D21/18—Construction of the scrapers or the driving mechanisms for settling tanks
    • B01D21/186—Construction of the scrapers or the driving mechanisms for settling tanks with two or more scrapers fixed at different heights on a central rotating shaft
    • 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
    • B01D21/2405—Feed mechanisms for settling tanks
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Abstract

786,807. Treating sewage. HARTLEY, C. J. July 27, 1956 [July 27, 1955], No. 21657/55. Class 111. Rotary scraper apparatus for sedimentation tanks comprises two independent sets of scrapers, an outer set 26 scraping the outer part of the tank and an inner set 43 inwardly from where the outer set terminate, the peripheral speeds of the two sets being the same. A circular tank has an outer zone with a gently sloping floor 10 surrounding an inner zone with a more steeply sloping floor 11 leading to a central hopper 45. A cross bridge 20 pivoted at the centre of the tank and supported at its free end by the outer wall 15 of the tank where a driving gear 17 rotates it about its pivot carries the outer scrapers 26 through depending arms 25. The inner scrapers 43 which operate on the floor 11 depend from lattice work 42 carried by a cylindrical feed box 41 supported by arms 40 attached to a sleeve 34 driven by a motor 29 and worm gear at twice the rotational speed of the crossbridge 20. Further scrapers 43a on the lattice 42 may operate in the hopper 45. In modifications, the lattice 42 hangs directly from the arms 40 and the feed box is secured to the crossbridge 20 or the motor drives a large crown wheel from which the lattice is suspended. Specification 721,522 is referred to and Specification 540,432 is referred to in the Provisional Specification.
GB21657/55A 1955-07-27 1955-07-27 Improvements in rotary scraper apparatus for sedimentation tanks Expired GB786807A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB21657/55A GB786807A (en) 1955-07-27 1955-07-27 Improvements in rotary scraper apparatus for sedimentation tanks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21657/55A GB786807A (en) 1955-07-27 1955-07-27 Improvements in rotary scraper apparatus for sedimentation tanks

Publications (1)

Publication Number Publication Date
GB786807A true GB786807A (en) 1957-11-27

Family

ID=10166618

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21657/55A Expired GB786807A (en) 1955-07-27 1955-07-27 Improvements in rotary scraper apparatus for sedimentation tanks

Country Status (1)

Country Link
GB (1) GB786807A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3959152A (en) * 1973-12-28 1976-05-25 Dorr-Oliver Incorporated Traction-driven composite sludge raking mechanism for sedimentation tanks
NL1007977C2 (en) * 1998-01-07 1999-07-08 Witteveen & Bos Raadgevende In Settling tank for separation of active sludge from treated sewage
CN106145326A (en) * 2016-07-20 2016-11-23 浙江工业大学 Radial-flow two-region sedimentation tank for continuous-flow aerobic granular sludge

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3959152A (en) * 1973-12-28 1976-05-25 Dorr-Oliver Incorporated Traction-driven composite sludge raking mechanism for sedimentation tanks
NL1007977C2 (en) * 1998-01-07 1999-07-08 Witteveen & Bos Raadgevende In Settling tank for separation of active sludge from treated sewage
CN106145326A (en) * 2016-07-20 2016-11-23 浙江工业大学 Radial-flow two-region sedimentation tank for continuous-flow aerobic granular sludge

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