CA2262626A1 - Apparatus for distributing gas and liquid during concurrent gas/liquid backwash in flat bottom flumes - Google Patents

Apparatus for distributing gas and liquid during concurrent gas/liquid backwash in flat bottom flumes

Info

Publication number
CA2262626A1
CA2262626A1 CA002262626A CA2262626A CA2262626A1 CA 2262626 A1 CA2262626 A1 CA 2262626A1 CA 002262626 A CA002262626 A CA 002262626A CA 2262626 A CA2262626 A CA 2262626A CA 2262626 A1 CA2262626 A1 CA 2262626A1
Authority
CA
Canada
Prior art keywords
gas
liquid
baffle
backwash
flume
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
CA002262626A
Other languages
French (fr)
Other versions
CA2262626C (en
Inventor
Richard W. Hsieh
John Geibel
Eugen O. Bergmann
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.)
Xylem Water Solutions Zelienople LLC
Original Assignee
The F.B. Leopold Co., Inc.
Richard W. Hsieh
John Geibel
Eugen O. Bergmann
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 The F.B. Leopold Co., Inc., Richard W. Hsieh, John Geibel, Eugen O. Bergmann filed Critical The F.B. Leopold Co., Inc.
Publication of CA2262626A1 publication Critical patent/CA2262626A1/en
Application granted granted Critical
Publication of CA2262626C publication Critical patent/CA2262626C/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
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
    • B01D24/20—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being provided in an open container
    • B01D24/24—Downward filtration, the container having distribution or collection headers or pervious conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/46—Regenerating the filtering material in the filter
    • B01D24/4631—Counter-current flushing, e.g. by air

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

A concurrent backwash distribution apparatus for a filter (11) having a filter tank (13) and a plurality of underdrain laterals (24) includes a baffle (10) positioned in a common main conduit (12) to define a secondary flume (14) between the baffle (10) and the underdrain laterals (24). The secondary flume (14) is in fluid communication with common main conduit (12) and the underdrain laterals (24). The baffle (10) has at least one flume liquid metering orifice (16) located adjacent a bottom of the baffle (10) so that it is below a gas liquid interface (23) in the secondary flume (14) during concurrent gas/liquid backwash operations. A flow distribution plate (18) is positioned between the secondary flume (14) and the underdrain laterals (24), the flow distribution plate (18) having at least one liquid metering orifice (22) and at least one gas metering orifice (20). The baffle (10) may be an upstanding partition (26) or an L-shaped partition (30). The baffle (10) creates adequate room for low velocity flow of backwash liquid in flat bottom flumes, while at the same time providing clearance for flow of backwash gas.
CA002262626A 1996-07-31 1997-07-31 Apparatus for distributing gas and liquid during concurrent gas/liquid backwash in flat bottom flumes Expired - Lifetime CA2262626C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US2311696P 1996-07-31 1996-07-31
US60/023,116 1996-07-31
PCT/US1997/013512 WO1998004332A1 (en) 1996-07-31 1997-07-31 Apparatus for distributing gas and liquid during concurrent gas/liquid backwash in flat bottom flumes

Publications (2)

Publication Number Publication Date
CA2262626A1 true CA2262626A1 (en) 1998-02-05
CA2262626C CA2262626C (en) 2005-07-26

Family

ID=21813223

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002262626A Expired - Lifetime CA2262626C (en) 1996-07-31 1997-07-31 Apparatus for distributing gas and liquid during concurrent gas/liquid backwash in flat bottom flumes

Country Status (3)

Country Link
AU (1) AU3743697A (en)
CA (1) CA2262626C (en)
WO (1) WO1998004332A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7063787B2 (en) 2001-06-06 2006-06-20 Usfilter Corporation Filter media retaining cap and hold down grid
US6991726B2 (en) 2002-07-01 2006-01-31 Usfilter Corporation Filter having a media retaining plate
US6830684B2 (en) 2002-07-10 2004-12-14 U.S. Filter Corporation Integrated liquid and gas distribution device for underdrain block laterals
US8226834B2 (en) 2005-05-17 2012-07-24 Xylem Water Solutions Zelienople, Llc Apparatus and method for distributing gas and liquid during backwash in filter underdrain flumes using dual separation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5068034A (en) * 1990-05-03 1991-11-26 Unilift Corporation Purification underdrain with means to compensate for flow and pressure differences between laterals
US5328608A (en) * 1992-05-27 1994-07-12 The F.B. Leopold Co., Inc. Mutli-lateral filter underdrain block

Also Published As

Publication number Publication date
AU3743697A (en) 1998-02-20
CA2262626C (en) 2005-07-26
WO1998004332A1 (en) 1998-02-05

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20170731