FR2395057A1 - Decanter for purifying water contg. particulate materials - incorporates scraper which can be lifted clear of deposited mud, facilitating starting after prolonged stoppage - Google Patents

Decanter for purifying water contg. particulate materials - incorporates scraper which can be lifted clear of deposited mud, facilitating starting after prolonged stoppage

Info

Publication number
FR2395057A1
FR2395057A1 FR7719552A FR7719552A FR2395057A1 FR 2395057 A1 FR2395057 A1 FR 2395057A1 FR 7719552 A FR7719552 A FR 7719552A FR 7719552 A FR7719552 A FR 7719552A FR 2395057 A1 FR2395057 A1 FR 2395057A1
Authority
FR
France
Prior art keywords
scraper
decanter
mud
incorporates
particulate materials
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
FR7719552A
Other languages
French (fr)
Other versions
FR2395057B3 (en
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 FR7719552A priority Critical patent/FR2395057A1/en
Priority to IT49940/78A priority patent/IT1105014B/en
Priority to ES471056A priority patent/ES471056A1/en
Publication of FR2395057A1 publication Critical patent/FR2395057A1/en
Application granted granted Critical
Publication of FR2395057B3 publication Critical patent/FR2395057B3/fr
Granted 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
    • B01D21/0012—Settling tanks making use of filters, e.g. by floating layers of particulate material
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Centrifugal Separators (AREA)

Abstract

A decanter, consisting of a decantation tank and a scraper driven axially to circulate decanted mud from the periphery of the tank to the centre where it is discharged, incorporates means of raising or lowering the scraper, pref. independent of its means of rotation, and such that the rate of lifting is considerably greater than that of lowering. Used partic. for the purificn. of water which has been used to wash material extracted from quarries and sand-pits or coal or mineral mines. Process facilitates starting of the scraper after a prolonged stoppage resulting in a thick layer of mud. The scraper can be raised out of the layer, then started up and lowered so that it enters the mud in a very progressive manner until it comes back to its normal operating regime. Decanter may be used when decantation gives rise to the formation of dense muds, e.g. in sugar refining, in the cases when a flocculating agent is made heavy by a flocculant and in the case where a ppte. is formed by crystallisation in a liq. medium other than water.
FR7719552A 1977-06-22 1977-06-22 Decanter for purifying water contg. particulate materials - incorporates scraper which can be lifted clear of deposited mud, facilitating starting after prolonged stoppage Granted FR2395057A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7719552A FR2395057A1 (en) 1977-06-22 1977-06-22 Decanter for purifying water contg. particulate materials - incorporates scraper which can be lifted clear of deposited mud, facilitating starting after prolonged stoppage
IT49940/78A IT1105014B (en) 1977-06-22 1978-06-20 DECANTER WITH VERTICAL SCRAPER IN PARTICULAR FOR STONE AND SAND QUARRIES
ES471056A ES471056A1 (en) 1977-06-22 1978-06-22 Decanter for purifying water contg. particulate materials - incorporates scraper which can be lifted clear of deposited mud, facilitating starting after prolonged stoppage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7719552A FR2395057A1 (en) 1977-06-22 1977-06-22 Decanter for purifying water contg. particulate materials - incorporates scraper which can be lifted clear of deposited mud, facilitating starting after prolonged stoppage

Publications (2)

Publication Number Publication Date
FR2395057A1 true FR2395057A1 (en) 1979-01-19
FR2395057B3 FR2395057B3 (en) 1980-04-04

Family

ID=9192585

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7719552A Granted FR2395057A1 (en) 1977-06-22 1977-06-22 Decanter for purifying water contg. particulate materials - incorporates scraper which can be lifted clear of deposited mud, facilitating starting after prolonged stoppage

Country Status (3)

Country Link
ES (1) ES471056A1 (en)
FR (1) FR2395057A1 (en)
IT (1) IT1105014B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007093015A1 (en) * 2006-02-17 2007-08-23 Alan Lewis Fitzmaurice Clarifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007093015A1 (en) * 2006-02-17 2007-08-23 Alan Lewis Fitzmaurice Clarifier

Also Published As

Publication number Publication date
ES471056A1 (en) 1979-09-16
IT1105014B (en) 1985-10-28
IT7849940A0 (en) 1978-06-20
FR2395057B3 (en) 1980-04-04

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