GB1071142A - Method and apparatus for the decantation of liquids - Google Patents

Method and apparatus for the decantation of liquids

Info

Publication number
GB1071142A
GB1071142A GB35173/64A GB3517364A GB1071142A GB 1071142 A GB1071142 A GB 1071142A GB 35173/64 A GB35173/64 A GB 35173/64A GB 3517364 A GB3517364 A GB 3517364A GB 1071142 A GB1071142 A GB 1071142A
Authority
GB
United Kingdom
Prior art keywords
flow
sludge
during
liquid
devices
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
GB35173/64A
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.)
Prat Daniel S A
Original Assignee
Prat Daniel S A
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 Prat Daniel S A filed Critical Prat Daniel S A
Publication of GB1071142A publication Critical patent/GB1071142A/en
Expired 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
    • B01D21/28—Mechanical auxiliary equipment for acceleration of sedimentation, e.g. by vibrators or the like
    • B01D21/283—Settling tanks provided with vibrators
    • 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
    • B01D21/0018—Separation of suspended solid particles from liquids by sedimentation provided with a pump mounted in or on a settling tank
    • 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
    • B01D21/0024—Inlets or outlets provided with regulating devices, e.g. valves, flaps
    • 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
    • B01D21/003—Sedimentation tanks provided with a plurality of compartments separated by a partition wall
    • 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
    • B01D21/003—Sedimentation tanks provided with a plurality of compartments separated by a partition wall
    • B01D21/0036—Horizontal partition walls
    • 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
    • B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
    • 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
    • B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
    • B01D21/0042—Baffles or guide plates
    • 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
    • B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents
    • 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
    • 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
    • B01D21/08—Settling tanks with single outlets for the separated liquid provided with flocculating compartments
    • 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
    • B01D21/24—Feed or discharge 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
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/245—Discharge mechanisms for the sediments
    • 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
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2488—Feed or discharge mechanisms for settling tanks bringing about a partial recirculation of the liquid, e.g. for introducing chemical aids
    • 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
    • B01D21/30—Control equipment
    • 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
    • B01D21/30—Control equipment
    • B01D21/302—Active control mechanisms with external energy, e.g. with solenoid valve
    • 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
    • B01D21/30—Control equipment
    • B01D21/34—Controlling the feed distribution; Controlling the liquid level ; Control of process parameters
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5281—Installations for water purification using chemical agents

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Sludge (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

Water or other liquid to which a coagulation reagent has been added is introduced into a decantation zone at a rate of flow which is sinusoidally modulated; sediment is formed in the zone, and a portion of it is removed and re-injected into the zone at a rate of flow which is also sinusoidally modulated, but not in the same phase as the water flow. Preferably the phase difference is p /2. The cycle of operations thereby produced consists of four stages: a working stage, during which a sludge bed (for upward flow of liquid therethrough) is formed; an expansion stage, during which some treated liquid and some sludge are removed separately from the apparatus; a further working stage, during which further sludge is formed by agglomeration of particles; and a compression stage, during which heavy particles from the sludge bed descend into, and are segregated in, concentrators which constitute quiescent zones; (it is from these concentrators that sludge is removed during the expansion stage). To enable smooth operation to be established, the flow-controlling devices are duplicated, one set of devices working in opposite phase to the other. Operation and control The liquid and sludge are moved in "feed" devices by compressed air provided by a continuously-operating compressor, and the sinusoidal effect is produced by permitting some of this air to leak to the atmosphere through escape valves which are progressively opened and closed. The opening and closing are performed by rotary mechanism whose direction of rotation is periodically and automatically reversed. Connection of the feed devices to either the compressed air supply or the escape valves is governed by remote-controlled valves operated electrically in sequence by a cam-and-contact unit driven by the above-mentioned rotary mechanism. A control desk is provided. The time-period of a complete sinusoidal variation, the flow amplitude (i.e., difference between maximum and minimum flow rate) and the phase difference between liquid flow and sludge flow, may all be varied.
GB35173/64A 1963-08-30 1964-08-27 Method and apparatus for the decantation of liquids Expired GB1071142A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR946132A FR1383791A (en) 1963-08-30 1963-08-30 Method and apparatus for settling liquids

Publications (1)

Publication Number Publication Date
GB1071142A true GB1071142A (en) 1967-06-07

Family

ID=8811457

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35173/64A Expired GB1071142A (en) 1963-08-30 1964-08-27 Method and apparatus for the decantation of liquids

Country Status (4)

Country Link
US (1) US3320161A (en)
DE (1) DE1517704A1 (en)
FR (1) FR1383791A (en)
GB (1) GB1071142A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2458514A1 (en) * 1979-06-05 1981-01-02 Bydgoskie B P Badaw INSTALLATION FOR PURIFYING WATER OR WASTEWATER

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2281319A1 (en) * 1974-08-08 1976-03-05 Degremont Sa DEVICE FOR AUTOMATICALLY PERFORMING THE EXTRACTION OF SLUDGE AND THE WASHING OF A WATER TREATMENT APPARATUS
US4001118A (en) * 1975-08-11 1977-01-04 Enzmann Siegmund J Apparatus for separating foreign solid particles from a liquid
FR2345396A1 (en) * 1976-03-24 1977-10-21 Degremont SLUDGE TREATMENT APPARATUS BY RECIRCULATION, PRECIPITATION AND SEPARATION OF FORMED SLUDGE
FR2532930B1 (en) * 1982-09-15 1987-08-21 Soaf REACTOR FOR THE PHYSICO-CHEMICAL TREATMENT OF WASTEWATER

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3068172A (en) * 1954-11-23 1962-12-11 Degremont Acfi Method of clarifying liquid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2458514A1 (en) * 1979-06-05 1981-01-02 Bydgoskie B P Badaw INSTALLATION FOR PURIFYING WATER OR WASTEWATER

Also Published As

Publication number Publication date
US3320161A (en) 1967-05-16
DE1517704A1 (en) 1969-09-11
FR1383791A (en) 1965-01-04

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