CA2514677C - Methode pour le lavage a contre-courant de filtres; le lit filtrant utilise en l'occurrence - Google Patents

Methode pour le lavage a contre-courant de filtres; le lit filtrant utilise en l'occurrence Download PDF

Info

Publication number: CA2514677C
Authority: CA; Canada
Prior art keywords: filter; layer; filter layer; floc; liquid
Prior art date: 1990-08-31
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 - Lifetime

Application number

CA002514677A

Other languages

English (en)

Other versions

CA2514677A1 (fr

Inventor

Annabelle Kim

R. Lee Roberts

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.)

RF Delaware Inc

Original Assignee

RF Delaware Inc

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.)

1990-08-31

Filing date

1991-08-23

Publication date

2009-11-24

1990-08-31 Priority claimed from US07/576,023 external-priority patent/US5080808A/en

1991-08-23 Application filed by RF Delaware Inc filed Critical RF Delaware Inc

1991-08-23 Priority claimed from CA002330528A external-priority patent/CA2330528C/fr

1992-03-01 Publication of CA2514677A1 publication Critical patent/CA2514677A1/fr

2009-11-24 Application granted granted Critical

2009-11-24 Publication of CA2514677C publication Critical patent/CA2514677C/fr

2011-08-23 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

238000005406 washing Methods 0.000 claims abstract description 56
239000007788 liquid Substances 0.000 claims abstract description 55
238000005189 flocculation Methods 0.000 claims abstract description 51
230000016615 flocculation Effects 0.000 claims abstract description 51
238000000034 method Methods 0.000 claims abstract description 43
238000005243 fluidization Methods 0.000 claims abstract description 13
230000000717 retained effect Effects 0.000 claims abstract description 8
239000002245 particle Substances 0.000 claims description 26
239000007787 solid Substances 0.000 claims description 13
230000003068 static effect Effects 0.000 claims description 13
230000005484 gravity Effects 0.000 claims description 11
239000011236 particulate material Substances 0.000 claims description 6
238000002156 mixing Methods 0.000 claims description 5
238000011144 upstream manufacturing Methods 0.000 claims description 4
239000000463 material Substances 0.000 claims description 3
230000008569 process Effects 0.000 abstract description 3
230000001737 promoting effect Effects 0.000 abstract description 3
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 39
238000011045 prefiltration Methods 0.000 description 15
238000004140 cleaning Methods 0.000 description 14
238000001914 filtration Methods 0.000 description 10
238000005498 polishing Methods 0.000 description 7
230000008901 benefit Effects 0.000 description 6
239000000126 substance Substances 0.000 description 6
238000011001 backwashing Methods 0.000 description 5
230000015572 biosynthetic process Effects 0.000 description 5
230000014759 maintenance of location Effects 0.000 description 5
230000035699 permeability Effects 0.000 description 5
238000013461 design Methods 0.000 description 4
239000012530 fluid Substances 0.000 description 4
238000013459 approach Methods 0.000 description 3
238000010420 art technique Methods 0.000 description 3
230000001112 coagulating effect Effects 0.000 description 3
238000012360 testing method Methods 0.000 description 3
239000002699 waste material Substances 0.000 description 3
238000004891 communication Methods 0.000 description 2
238000010276 construction Methods 0.000 description 2
239000004576 sand Substances 0.000 description 2
238000009991 scouring Methods 0.000 description 2
239000002351 wastewater Substances 0.000 description 2
230000009286 beneficial effect Effects 0.000 description 1
238000005352 clarification Methods 0.000 description 1
-1 coagLiant aids Substances 0.000 description 1
239000000701 coagulant Substances 0.000 description 1
238000012937 correction Methods 0.000 description 1
230000003247 decreasing effect Effects 0.000 description 1
239000000645 desinfectant Substances 0.000 description 1
230000009977 dual effect Effects 0.000 description 1
230000000694 effects Effects 0.000 description 1
230000003311 flocculating effect Effects 0.000 description 1
238000011010 flushing procedure Methods 0.000 description 1
239000013618 particulate matter Substances 0.000 description 1
238000005192 partition Methods 0.000 description 1
230000009467 reduction Effects 0.000 description 1
238000004075 wastewater filtration Methods 0.000 description 1

Landscapes

Filtration Of Liquid (AREA)

CA002514677A 1990-08-31 1991-08-23 Methode pour le lavage a contre-courant de filtres; le lit filtrant utilise en l'occurrence Expired - Lifetime CA2514677C (fr)

Applications Claiming Priority (3)

Application Number	Priority Date	Filing Date	Title
US07/576,023 US5080808A (en)	1990-08-01	1990-08-31	Method of washing an upflow filter and filter bed employed in said filter
US576,023		1990-08-31
CA002330528A CA2330528C (fr)	1990-08-31	1991-08-23	Methode pour le lavage a contre-courant de filtres; le lit filtrant utilise en l'occurrence

Related Parent Applications (1)

Application Number	Title	Priority Date	Filing Date
CA002330528A Division CA2330528C (fr)	1990-08-31	1991-08-23	Methode pour le lavage a contre-courant de filtres; le lit filtrant utilise en l'occurrence

Publications (2)

Publication Number	Publication Date
CA2514677A1 CA2514677A1 (fr)	1992-03-01
CA2514677C true CA2514677C (fr)	2009-11-24

Family

ID=35276923

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA002514677A Expired - Lifetime CA2514677C (fr)	1990-08-31	1991-08-23	Methode pour le lavage a contre-courant de filtres; le lit filtrant utilise en l'occurrence

Country Status (1)

Country	Link
CA (1)	CA2514677C (fr)

1991
- 1991-08-23 CA CA002514677A patent/CA2514677C/fr not_active Expired - Lifetime

Also Published As

Publication number	Publication date
CA2514677A1 (fr)	1992-03-01

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Legal Events

Date	Code	Title	Description
2005-09-09	EEER	Examination request
2011-08-23	MKEX	Expiry