GB1497866A - Microscreening method and apparatus - Google Patents

Microscreening method and apparatus

Info

Publication number
GB1497866A
GB1497866A GB55930/74A GB5593074A GB1497866A GB 1497866 A GB1497866 A GB 1497866A GB 55930/74 A GB55930/74 A GB 55930/74A GB 5593074 A GB5593074 A GB 5593074A GB 1497866 A GB1497866 A GB 1497866A
Authority
GB
United Kingdom
Prior art keywords
drum
box
pressure
space
spray
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
GB55930/74A
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.)
Water Pollution Control Corp
Original Assignee
Water Pollution Control Corp
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 Water Pollution Control Corp filed Critical Water Pollution Control Corp
Publication of GB1497866A publication Critical patent/GB1497866A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B01D33/067—Construction of the filtering drums, e.g. mounting or sealing arrangements
    • 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
    • B01D33/11—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for outward flow filtration
    • 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
    • B01D33/48—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D33/50—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
    • 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
    • B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
    • B01D33/72—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding
    • 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
    • B01D33/80—Accessories
    • B01D33/804—Accessories integrally combined with devices for controlling the filtration
    • B01D33/807—Accessories integrally combined with devices for controlling the filtration by level measuring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/20—Pressure-related systems for filters
    • B01D2201/202—Systems for applying pressure to filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/20—Pressure-related systems for filters
    • B01D2201/204—Systems for applying vacuum to filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/28—Position of the filtering element
    • B01D2201/282—Filtering elements with a horizontal rotation or symmetry axis

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)
  • Separation Of Particles Using Liquids (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)

Abstract

1497866 Rotary drum filters WATER POLLUTION CONTROL CORP 27 Dec 1974 [26 Dec 1973] 55930/74 Heading B1D In a method of microscreening a suspension to be screened is fed to the interior of a rotary drum so that a pool of suspension and a gas space thereabove are formed inside the drum, separated solids are removed from the drum's inner surface at a point above the pool by a back-flushing liquid spray into a collecting means within the drum and a positive pressure differential is maintained between the gas space and the space outside the drum during at least part of the method by applying positive pressure to the gasspace or suction to the space outside the drum. The pressure of the backflushing spray and the pressure differential may be varied during the process. In Fig. 11 drum 153 is rotating in filtrate-receiving tank 141 and receiving liquid from box 152, separated solids being removed from the drum by liquid spray from nozzles 165 into trough 157. The blower 190 is operating all the time. When the level of pool 154 is below the uppermost point of inlet 151 the. air from blower 190 is vented to atmosphere via inlet 151 and -box 152. When the level of the pool rises so that inlet 151 is filled, the air from blower 190 maintains a positive gas differential between space 173 and the space immediately outside the drum. If the liquid in box 152 rises to float 177a the pressure of the spray from nozzles 165 is increased; the spray pressure returns to its former value if the liquid in box 152 falls below float 175a. In Fig. 15 the apparatus is provided with a box 210 and trough 257a so that the pressures P 4 and P 3 may be maintained differently from pressure P 2 of the gas space. (P 4 # P 3 ). The drum may be mounted in a closed tank (e.g. Fig. 8, not shown).
GB55930/74A 1973-12-26 1974-12-27 Microscreening method and apparatus Expired GB1497866A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US42760073A 1973-12-26 1973-12-26

Publications (1)

Publication Number Publication Date
GB1497866A true GB1497866A (en) 1978-01-12

Family

ID=23695535

Family Applications (1)

Application Number Title Priority Date Filing Date
GB55930/74A Expired GB1497866A (en) 1973-12-26 1974-12-27 Microscreening method and apparatus

Country Status (5)

Country Link
JP (1) JPS5820291B2 (en)
CA (1) CA1060351A (en)
DE (1) DE2461663C3 (en)
FR (1) FR2255936B1 (en)
GB (1) GB1497866A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011032583A1 (en) * 2009-09-16 2011-03-24 Skjølstrup & Grønborg Aps Water screening
US10058806B2 (en) * 2013-11-07 2018-08-28 Miura Co., Ltd. Ballast water treatment device
US10464821B2 (en) 2014-05-21 2019-11-05 B.V. Scheepswerf Damen Gorinchem System and method for cleaning and sterilizing a water flow

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES479119A1 (en) * 1978-04-07 1979-11-16 Kloeckner Humboldt Deutz Ag Method for vacuum filtration
JPS5558213U (en) * 1978-10-14 1980-04-19
DE3120891A1 (en) * 1981-05-26 1982-12-23 Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe METHOD FOR REMOVAL OR PARTIAL REMOVAL OF INTERESTING SUBSTANCES CONTAINED IN A FLOWING WATER, AND DEVICE FOR IMPLEMENTING THE METHOD
DE3629961A1 (en) * 1986-09-03 1988-03-17 Bott Reinhard Apparatus for filtering out or screening solid particles from a liquid
JPH08512237A (en) * 1993-07-06 1996-12-24 ノルディック ウォーター プロダクツ アクチボラゲット Device for filtering liquid containing particles
CN108889595B (en) * 2018-07-02 2021-07-09 滨州学院 Civil engineering construction is handled with waste material and is used cement separator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1080523B (en) * 1958-04-15 1960-04-28 Passavant Werke Drum sieve machine for water purification
DE1254595B (en) * 1965-11-05 1967-11-23 Krauss Maffei Imp G M B H Cellless cylindrical rotating internal filter
SE315490B (en) * 1968-04-03 1969-09-29 H Nilsson
FR2079452A5 (en) * 1970-02-02 1971-11-12 Beaudrey & Cie

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011032583A1 (en) * 2009-09-16 2011-03-24 Skjølstrup & Grønborg Aps Water screening
US10058806B2 (en) * 2013-11-07 2018-08-28 Miura Co., Ltd. Ballast water treatment device
US10464821B2 (en) 2014-05-21 2019-11-05 B.V. Scheepswerf Damen Gorinchem System and method for cleaning and sterilizing a water flow

Also Published As

Publication number Publication date
DE2461663A1 (en) 1975-07-10
JPS50106280A (en) 1975-08-21
DE2461663C3 (en) 1982-01-14
FR2255936B1 (en) 1982-04-02
JPS5820291B2 (en) 1983-04-22
FR2255936A1 (en) 1975-07-25
CA1060351A (en) 1979-08-14
DE2461663B2 (en) 1980-12-04

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Legal Events

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