GB2231504A - Rotary scraper for hopper [pyramidal] bottomed tanks - Google Patents

Rotary scraper for hopper [pyramidal] bottomed tanks Download PDF

Info

Publication number
GB2231504A
GB2231504A GB8905238A GB8905238A GB2231504A GB 2231504 A GB2231504 A GB 2231504A GB 8905238 A GB8905238 A GB 8905238A GB 8905238 A GB8905238 A GB 8905238A GB 2231504 A GB2231504 A GB 2231504A
Authority
GB
United Kingdom
Prior art keywords
pyramidal
tanks
hopper
tank
scraper
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
GB8905238A
Other versions
GB8905238D0 (en
GB2231504B (en
Inventor
William Brooke Midgley
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 GB8905238A priority Critical patent/GB2231504B/en
Publication of GB8905238D0 publication Critical patent/GB8905238D0/en
Publication of GB2231504A publication Critical patent/GB2231504A/en
Application granted granted Critical
Publication of GB2231504B publication Critical patent/GB2231504B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B01D21/18—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
    • B01D21/20—Driving mechanisms

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)

Abstract

A settling tank whose lower part is shaped like an inverted pyramid of rectangular cross-section is cleaned by one or more scraper chains 4 hanging down the tank sides from an endless cable 3 which is driven round pulleys 2 at the tank corners. <IMAGE>

Description

ROTARY SCRAPER SYSTEM FOR HOPPER (PYRAMIDAL) BOTTOMED TANKS DESCRIPTION This invention relates to equipment for scraping deposits fro: the walls (vertical and sloping) of hopper bottomed (pyramidal) tanks used usually (but not exclusively) as settling tanks at Sewage Treatment Works.
Methods of scraping circular and rectangular tanks are will known, and, until- the recent introduction of automatic desludging it has generally been assumed that pyramidal tanks did not require scraping because the angle of the sides was "self-cleaning".
However, in the past men have ocassionally walked around a tank dragging a suspended chain around the sides to dislodge sludge.
This is very labour intensive and is not often done. This invention is intended to remove deposits from the scraped surfaces by mechanical apparatus.
Treatment processes other than sewage treatment use hopper (pyramidal) bottomsd tanks and this method of cleaning may be applied to these processes (eg. paper production).
According to the present invention there are four corner pulleys (or similar guides) which support a wire rope (chain or similar drive). A drive unit is provided to cause the wire rope (or similar) to be driven horizontally. The drive unit may take the place of a corner pulley. From the horizontal wire rope are suspended one or more chains (or similar flexible member) which are of a length to reach nearly to or to the bottom of the tank. The system may be either hand operated or mechanically driven with, or without automatic controls, as desired.
A specific embodyment of the invention will now be described by way of example with reference to the accompanying drawing in which: Figure 1 5 a section of a typical Hopper Bottomed Tank.
Figure 2 is a plan of a typical Hopper Bottomed Tank.
Referring to the drawing: The tank (1) has in each corner, and supported from the tank structure, a pulley (2) (cr similar device) upon which runs a cable (3) (or similar support) to which is attached a chain (or similar flexible member) (4).
Scum boards (7), or similar obstructions, may determine the siting of the pulleys (2) and the number and arrangement of the pulleys.
The equipment (6) for horizontal driving of the rope (3) (or similar membe-) is indicated schematically and may be hand oper- ated or motorised. Motorised systems may, ifWrequired, include various safety devices to detect tight or slack cables. The position and number of the suspended chains (4) may be dependent upon other equipment in the tanks and this may, in turn, effect the arrangement of pulleys (2).
By operating the equipment the wire rope (or similar) will be driven horizontally and the suspended chains will rotate around the tank internal surfaces dislodging deposits from the tank surfaces into the sump. The periods between operating cycles will be determined to suit the particular treatment process and may be automatically controlled.

Claims (2)

  1. Claim 1.
    A system for scraping Hopper Bottomed (pyramidal) tanks comprising one or more suspended rotating scraper chains (or similar flexible members) and equipment for diving the scraper chains in a rotary motion around the tanks. The driving equipment may or may not be motorised or automated to suit the system requirements.
  2. Claim 2.
    A scraper system as claimed in Claim 1 with driving equipment to cause the suspended scraper chains to be driven in a reciprocating motion.
GB8905238A 1989-03-08 1989-03-08 Rotary scraper system for hopper(pyramidal)bottomed tanks Expired - Lifetime GB2231504B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8905238A GB2231504B (en) 1989-03-08 1989-03-08 Rotary scraper system for hopper(pyramidal)bottomed tanks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8905238A GB2231504B (en) 1989-03-08 1989-03-08 Rotary scraper system for hopper(pyramidal)bottomed tanks

Publications (3)

Publication Number Publication Date
GB8905238D0 GB8905238D0 (en) 1989-04-19
GB2231504A true GB2231504A (en) 1990-11-21
GB2231504B GB2231504B (en) 1992-12-16

Family

ID=10652913

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8905238A Expired - Lifetime GB2231504B (en) 1989-03-08 1989-03-08 Rotary scraper system for hopper(pyramidal)bottomed tanks

Country Status (1)

Country Link
GB (1) GB2231504B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6730193B1 (en) 1999-08-20 2004-05-04 Andritz Oy Wire pit
WO2010049598A1 (en) * 2008-10-30 2010-05-06 Gaudfrin Device for extracting cakes resulting from pressurised disc filtration, and associated extraction method
US8585898B2 (en) 2008-10-30 2013-11-19 Gaudfrin Scrapping device for a pressurised filtration plant

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB378890A (en) * 1931-04-13 1932-08-15 William Warren Triggs Improvements in sedimentation apparatus
GB486927A (en) * 1936-12-09 1938-06-09 Dorr Oliver Company Ltd Improvements in and relating to mechanism for cleaning or scraping sedimentation tanks or like containers
GB944625A (en) * 1961-07-06 1963-12-18 Hartleys Stoke On Trent Ltd Improvements relating to rotary scrapers for sedimentation tanks
GB1009414A (en) * 1963-08-23 1965-11-10 Maschf Augsburg Nuernberg Ag Sludge remover for sedimentation tank
GB1177770A (en) * 1966-12-30 1970-01-14 Ames Crosta Mills & Company Lt Improvements in or relating to Settling Tanks for Sewage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB378890A (en) * 1931-04-13 1932-08-15 William Warren Triggs Improvements in sedimentation apparatus
GB486927A (en) * 1936-12-09 1938-06-09 Dorr Oliver Company Ltd Improvements in and relating to mechanism for cleaning or scraping sedimentation tanks or like containers
GB944625A (en) * 1961-07-06 1963-12-18 Hartleys Stoke On Trent Ltd Improvements relating to rotary scrapers for sedimentation tanks
GB1009414A (en) * 1963-08-23 1965-11-10 Maschf Augsburg Nuernberg Ag Sludge remover for sedimentation tank
GB1177770A (en) * 1966-12-30 1970-01-14 Ames Crosta Mills & Company Lt Improvements in or relating to Settling Tanks for Sewage

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6730193B1 (en) 1999-08-20 2004-05-04 Andritz Oy Wire pit
WO2010049598A1 (en) * 2008-10-30 2010-05-06 Gaudfrin Device for extracting cakes resulting from pressurised disc filtration, and associated extraction method
US8585898B2 (en) 2008-10-30 2013-11-19 Gaudfrin Scrapping device for a pressurised filtration plant
US9487360B2 (en) 2008-10-30 2016-11-08 Gaudfrin Device for extracting cakes resulting from pressurized disc filtration, and associated extraction method

Also Published As

Publication number Publication date
GB8905238D0 (en) 1989-04-19
GB2231504B (en) 1992-12-16

Similar Documents

Publication Publication Date Title
GB2231504A (en) Rotary scraper for hopper [pyramidal] bottomed tanks
GB2225253A (en) Cleaning of hopper-bottomed tanks
CA2064516A1 (en) Method and apparatus for sludge collection
ATE228385T1 (en) METHOD FOR CLEARING FLOATING SUBSTANCES AND CLEARING DEVICE
PL311715A1 (en) Settling tank cleaning apparatus
JPH07108229A (en) Wire rope cleaning apparatus
CN217593919U (en) Oil and slag scraping machine
SU1028345A1 (en) Oil trap
FI20000667A0 (en) Scratch Beam Unit
GB2318070A (en) Separating floating solids from a liquid
CN215279015U (en) A cleaning device for membrane tank bottom mud
CN214551487U (en) Sediment slag remover before sewage
CN218221214U (en) Sediment reaction tank residue cleaning device
CN219641706U (en) Soil detection mechanism for ecological restoration of vegetation
JPH10277371A (en) Cleaning device for filtration film element
SU1063487A1 (en) Installation for cleaning articles
SE9400753L (en) Method and apparatus for cleaning slats in a slat separator
EP3790641B1 (en) Automatic cleaning of lamella plate settler
JPH0522248Y2 (en)
SU1657243A1 (en) Conveyer set for cleaning parts
JPH0880402A (en) Algae removing device in treating basin such as sedimentation one
SU1412773A1 (en) Washing bath
SU820897A1 (en) Tank for cleaning washing-out water for painting spraying booth
RU2109876C1 (en) Device for collecting petroleum products from water surface
SU998362A1 (en) Apparatus for cleaning recirculation water from dyeing equipment from paint

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20000308