US2550341A - Process for controlling the concentrations of suspensions - Google Patents

Process for controlling the concentrations of suspensions Download PDF

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Publication number
US2550341A
US2550341A US690550A US69055046A US2550341A US 2550341 A US2550341 A US 2550341A US 690550 A US690550 A US 690550A US 69055046 A US69055046 A US 69055046A US 2550341 A US2550341 A US 2550341A
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US
United States
Prior art keywords
receiver
apex
cyclone
suspension
discharge
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 - Lifetime
Application number
US690550A
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English (en)
Inventor
Freerk J Fontein
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.)
Directie van de Staatsmijnen in Limburg
Original Assignee
Directie van de Staatsmijnen in Limburg
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 Directie van de Staatsmijnen in Limburg filed Critical Directie van de Staatsmijnen in Limburg
Application granted granted Critical
Publication of US2550341A publication Critical patent/US2550341A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/24—Multiple arrangement thereof
    • B04C5/28—Multiple arrangement thereof for parallel flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C11/00—Accessories, e.g. safety or control devices, not otherwise provided for, e.g. regulators, valves in inlet or overflow ducting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/24—Multiple arrangement thereof

Definitions

  • a closed receiver is associated with the apex opening of the cyclone, the receiver being filled with suspension and having a controllable outlet. If the capacity of the receiver outlet is increased, the pressure in the receiver decreases and the concentration of the suspension leaving the cyclone at its apex also decreases. This results, with some retardation, in the decrease of the concentration of the suspension discharging from the receiver outlet so that the specific gravity of discharge of the whole installation decreases.
  • reference numeral 5 designates a cyclone comprising a shallow'cylindrical top portion 6 having an inlet opening! at the end of a tangentially directed feed pipe 8.
  • a cover plate 9 is secured to the top of portion 6 and has a central discharge opening Ill.
  • Reference numeral ll designates a conicalportion depending from portion 6 coaxially therewith and having an apex opening I2 aligned with the base opening l0.
  • the lower end of portion I I is flanged at [3 and is secured to the top wall [4 of a closed receiver or tank [5 which has an opening 16 registering with the apex opening l2.
  • the receiver has a conical body portion I! which terminates downwardly in a housing l8 for a star wheel l9 adapted to be driven at a controllable speed for controlling the rate of discharge from the receiver.
  • designates a cyclone like cyclone 5 and similarly associated with the receiver.
  • the liquid suspension to be thickened is fed to the cyclones through the feed pipes 8.
  • the infed suspension will move in inner and outer vortices having the same rotational sense. However, the inner vortex moves axially toward the base discharge opening III while the outer vortex moves axially toward apex opening l2.
  • the fraction of higher concentration leaves the outer vortex of each cyclone through the apex opening I2 and the fraction of lower concentration leaves the inner vortex of each cyclone through the base opening l0.
  • the star wheel is rotated at a speed to maintain the desired pressure in the receiver and, hence, the desired resistance to the entry of the apex discharges. It will be observed that receiver l5 thus defines a pressure zone.
  • the advantage of providing a plurality of small cyclones instead of a single large one is that the precipitation efficiency of the small cyclone is greater, and this efiiciency does not decrease as much as that of the larger cyclone when the specific gravity of the apex discharge increases. Hitherto the lower limit of the cyclone size has been determined principally by the size of the apex aperture which decreases in proportion to the size of the cyclone. However, if several small cyclones discharge into a single suspensionfilled receiver, the specific gravity of the discharge is no longer determined by the size of the apex of the cyclone but by the pressure in the receiver and, consequently, the size of the apex openings can be large enough so as to eliminate the danger f clogging.
  • the average capacity of the receiver outlet is, of course, independent of the number of cyclones and only dependent upon the capacity of the installation, and this average outlet capacity will be the same in the case 'of a single large cyclone or a number of small cyclones discharging into the receiver.
  • the maximum diameter of .the cyclones is 2% inches, inlet diameter inch, diameter base-outlet inch, anddiameter of the apex outlet :inch.
  • the capacity of the receiver outlet is equivalent to a diameter of 1% inches, and the loss (if solid constituents through the :base outlets 01 the cyclones'amounts to 25% or .5-ton per hour:
  • I' may use a :valve 2

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  • Cyclones (AREA)
US690550A 1945-08-28 1946-08-14 Process for controlling the concentrations of suspensions Expired - Lifetime US2550341A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2550341X 1945-08-28

Publications (1)

Publication Number Publication Date
US2550341A true US2550341A (en) 1951-04-24

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ID=19874705

Family Applications (1)

Application Number Title Priority Date Filing Date
US690550A Expired - Lifetime US2550341A (en) 1945-08-28 1946-08-14 Process for controlling the concentrations of suspensions

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US (1) US2550341A (en16)
BE (1) BE473485A (en16)
DE (1) DE976488C (en16)
FR (1) FR946585A (en16)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2701056A (en) * 1951-09-01 1955-02-01 Thomas R Morton Method and apparatus for classifying and concentrating materials
US2717695A (en) * 1949-11-29 1955-09-13 Carl C Martin Cyclonic separator for wet operation
US2754968A (en) * 1950-03-09 1956-07-17 Stamicarbon Treatment of liquid materials in a hydrocyclone
US2819795A (en) * 1950-05-30 1958-01-14 Stamicarbon Process for the separation according to specific gravity of solids of different specific gravity and particle size
US3166496A (en) * 1960-08-01 1965-01-19 Commw Scient Ind Res Org Method and apparatus for the separation of solid particles into sized fractions
US4144087A (en) * 1976-10-22 1979-03-13 Cpc International Inc. System for separating mill starch to obtain a protein-rich product and a starch-rich product
US4244748A (en) * 1979-01-22 1981-01-13 Cpc International Inc. Method for separating mill starch to obtain a protein-rich product and a starch-rich product
FR2505680A1 (fr) * 1981-05-18 1982-11-19 Conoco Inc Appareil et procede pour la concentration des boues
US20130008840A1 (en) * 2011-07-06 2013-01-10 Pesetsky Serge Particle separator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19505073A1 (de) * 1995-02-15 1996-08-22 Recycling Energie Abfall Flachbodenhydrozyklon

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US453105A (en) * 1891-05-26 bretney
US1919653A (en) * 1931-11-27 1933-07-25 Raymond A Hill Hydraulic sand extractor
US2102525A (en) * 1936-03-11 1937-12-14 Nichols Eng & Res Corp Separation of solid particles from fluids
US2273271A (en) * 1940-12-28 1942-02-17 Frank W Kerns Apparatus for removing solids from fluids
US2356648A (en) * 1941-10-01 1944-08-22 Brusset Jean Albert Classifying process and apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1197946A (en) * 1913-05-02 1916-09-12 Frank Pardee Apparatus for separating coal, ore, &c.
US2312706A (en) * 1938-11-19 1943-03-02 Nichols Eng & Res Corp Method and apparatus for separating heavy particles from paper pulp suspensions

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US453105A (en) * 1891-05-26 bretney
US1919653A (en) * 1931-11-27 1933-07-25 Raymond A Hill Hydraulic sand extractor
US2102525A (en) * 1936-03-11 1937-12-14 Nichols Eng & Res Corp Separation of solid particles from fluids
US2273271A (en) * 1940-12-28 1942-02-17 Frank W Kerns Apparatus for removing solids from fluids
US2356648A (en) * 1941-10-01 1944-08-22 Brusset Jean Albert Classifying process and apparatus

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2717695A (en) * 1949-11-29 1955-09-13 Carl C Martin Cyclonic separator for wet operation
US2754968A (en) * 1950-03-09 1956-07-17 Stamicarbon Treatment of liquid materials in a hydrocyclone
US2819795A (en) * 1950-05-30 1958-01-14 Stamicarbon Process for the separation according to specific gravity of solids of different specific gravity and particle size
US2701056A (en) * 1951-09-01 1955-02-01 Thomas R Morton Method and apparatus for classifying and concentrating materials
US3166496A (en) * 1960-08-01 1965-01-19 Commw Scient Ind Res Org Method and apparatus for the separation of solid particles into sized fractions
US4144087A (en) * 1976-10-22 1979-03-13 Cpc International Inc. System for separating mill starch to obtain a protein-rich product and a starch-rich product
US4244748A (en) * 1979-01-22 1981-01-13 Cpc International Inc. Method for separating mill starch to obtain a protein-rich product and a starch-rich product
FR2505680A1 (fr) * 1981-05-18 1982-11-19 Conoco Inc Appareil et procede pour la concentration des boues
US20130008840A1 (en) * 2011-07-06 2013-01-10 Pesetsky Serge Particle separator
US9399182B2 (en) * 2011-07-06 2016-07-26 Johnson Electric S.A. Particle separator

Also Published As

Publication number Publication date
BE473485A (en16)
DE976488C (de) 1963-10-03
FR946585A (fr) 1949-06-08

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