EP0042771B1 - Procédé de régulation de l'amplitude de la pulsation dans un bac à pistonnage pneumatique - Google Patents

Procédé de régulation de l'amplitude de la pulsation dans un bac à pistonnage pneumatique Download PDF

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Publication number
EP0042771B1
EP0042771B1 EP81400798A EP81400798A EP0042771B1 EP 0042771 B1 EP0042771 B1 EP 0042771B1 EP 81400798 A EP81400798 A EP 81400798A EP 81400798 A EP81400798 A EP 81400798A EP 0042771 B1 EP0042771 B1 EP 0042771B1
Authority
EP
European Patent Office
Prior art keywords
air
valve
opening
leak
fact
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
EP81400798A
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German (de)
English (en)
French (fr)
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EP0042771A1 (fr
Inventor
Jean-Luc Lambert
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.)
Fives Cail Babcock SA
Original Assignee
Fives Cail Babcock SA
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 Fives Cail Babcock SA filed Critical Fives Cail Babcock SA
Publication of EP0042771A1 publication Critical patent/EP0042771A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/02—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation
    • B03B5/10—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation on jigs
    • B03B5/24—Constructional details of jigs, e.g. pulse control devices

Definitions

  • BE-A-467.117 describes a method for regulating the amplitude of the pulsation in a piston-type container comprising a chamber of tubes to be classified are separated into two superimposed layers in which, on the one hand, the level of separation of the layers by means of a probe emitting a measurement signal and, on the other hand, an air leak is caused by a leak member.
  • DE-A-2,539,374 describes a pneumatic plunger tank comprising a feeler which transmits a measurement signal, a unit for storing the program for opening and closing the admission member which delivers a information representative of said program, and a calculation unit which receives the information delivered by the storage unit and the signal emitted by the probe and which delivers a control signal from the exhaust member.
  • the solution according to the first cited document authorizes the regulation of the amplitude of the pulsation in a pneumatic piston stocking.
  • the object of the invention is to avoid the abovementioned drawbacks and to propose a process considerably improving that of BE-A-467.117.
  • a more specific subject of the invention is a method for regulating the amplitude of the pulsation in a pneumatic plunger tank in which products to be classified are separated into two superimposed layers, in which, on the one hand, the level of separation of the layers by means of a probe transmitting a measurement signal, and in that, on the other hand, an air leak is caused by means of a leak member, characterized in that the air leak is intermittent, its start being controlled after the complete opening of the air intake member, the end of the leak being controlled at the same time as the closing of said air intake member, and the duration of the leakage being determined by the signal emitted by the probe, said signal being directed to a calculation unit which receives information transmitted by unit for storing the program for opening and closing the admission member and which delivers a control signal from the leakage device.
  • a valve provided for this sole purpose or a valve constituting the air exhaust member is used as the escape member.
  • Figure 1 shows, in cross section, a simple tray according to a first embodiment.
  • Figure 2 is a diagram illustrating the operation of this tank.
  • Figure 3 shows, in cross section, a simple tray according to a second embodiment.
  • Figure 4 is a diagram illustrating the operation of this tank.
  • FIG. 5 represents, in transverse torque, a compartmentalized container according to a third embodiment tion.
  • Figure 6 is a diagram illustrating the operation of this tank.
  • FIG. 7 represents, in transverse torque, a compartmentalized container according to a fourth embodiment.
  • Figure 8 is a diagram illustrating the operation of this tank.
  • the reference numeral 1 designates the pulsation chamber of the pneumatic piston plunger for the separation of grain products of different densities.
  • Chamber 1 is supplied with water by a tube 2. Inside chamber 1, the water is subjected to pulsations pneumatically controlled by admission of compressed air.
  • an air chamber 3 is fitted through the chamber 1. Said air chamber, open over its entire length at its lower part, is thus placed in communication with the pulsation chamber 1.
  • the air supply the chamber 3 is compressed from a feeder 4, via a pipe 5 on which is mounted an inlet member, such as a butterfly valve 6. Said butterfly valve is controlled to ensure cyclically the opening and closing of the passage established by the piping 5 between the feeder 4 and the air chamber 3.
  • the exhaust of air from the chamber 3 is ensured, towards an expansion pot 7, via d 'a pipe 8 on which is mounted an exhaust member, such as a butterfly valve 9.
  • Said butterfly valve is controlled to cyclically ensure the opening and closing of the passage established by the pipe 8 between the air chamber 3 and the trigger 7.
  • the pulsations are transmitted to the water contained in a separation chamber 10 situated above the pulsation chamber 1, said chambers communicating with each other.
  • the bottom of the chamber 10 is constituted by a grid 11 in the form of a perforated table, which is immersed in water.
  • the products are separated under the effect of pulsations, in two superimposed layers.
  • the products of the lower layer, of high density are evacuated by the tube 13 which is provided at the lower part of the chamber 1, while the products of the upper layer, of low density, are evacuated with water, by overflow thereof outside the chamber 10.
  • the reference 17 designates a probe capable of detecting the level of separation of the two layers of the bed 12 and of transmitting a measurement signal representative of said level.
  • Reference numeral 18 designates a unit for storing the program for opening and closing the butterfly valve 6. Said unit delivers in the form of a signal information representative of said program.
  • FIG. 2 illustrates, in the form of a diagram, the opening and closing cycles which we have just described.
  • the operating cycles of the butterfly valve 6, the butterfly valve 9 and the solenoid valve 14 are shown from top to bottom.
  • the opening of the butterfly valve 6 is controlled at the instant t "l 'complete opening is carried out at time t 2 and closing is controlled at time t 4'
  • the opening of the solenoid valve 14 is controlled at time t 3 , after time t 2 and prior to time t 4 when the closing of the solenoid valve 14 is controlled at the same time as that of the butterfly valve 6.
  • the manifold 4, the piping 5 and the butterfly valve 6 are arranged on one side of the tank, while the expansion pot 7, the piping 8 and the butterfly valve 9 are arranged on the opposite side.
  • the signal delivered by the calculation unit 19 here controls the opening and closing of the butterfly valve 9 which constitutes both the leak member and the exhaust member. This signal is received by any conventional device, not shown, capable of controlling the operation of said butterfly valve.
  • a single unit 18 is provided for storing the programs relating to each compartment, and a calculation unit 19, also unique.
  • Figure 6 illustrates, in diagram form, the different opening and closing cycles.
  • This diagram differs from that of FIG. 2 by the only the fact that two leakage members are provided, the opening of these members 14 ′ and 14 ′′ being respectively controlled at the instants t'g and t ′′ 3 ′
  • These two variable instants are not necessarily the same, since the signals transmitted by the probes 17 'and 17 "are not necessarily identical.
  • FIG. 7 there is shown a piston container divided into two adjacent compartments by a longitudinal partition 20. Each of these compartments constitutes a container similar to that shown in Figure 3. The entire container is distinguished from a classic double tray, because the two compartments are associated with common elements. To identify the different elements represented, the same conventions have been adopted as those used with reference to FIG. 5.
  • the units 18 and 19 are identical to those of FIG. 5 but the unit 19 delivers two signals, one for controlling the butterfly valve 9 ', the other for controlling the butterfly valve 9 ".
  • FIG. 8 illustrates, in diagram form, the different opening and closing cycles.
  • This diagram differs from that of FIG. 4 by the simple fact that two leakage are provided, the opening of these members 9 ′ and 9 "being respectively controlled at instants t'a and t" 3.
  • these two variable instants are not necessarily the same. here the same advantage as that highlighted with reference to the description of FIG. 6.
  • each single tray or each compartmented tray into a plurality of cells.
  • Each cell of a single bin or each pair of cells opposite a compartmentalized bin is then arranged in accordance with the preceding description.
  • the duration of the opening of the leakage organ is controlled by the signal emitted by the corresponding probe, so that the pulsation decreases in intensity when the quantity of heavy products decreases, or more precisely falls below a setpoint.

Landscapes

  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Reciprocating Pumps (AREA)
  • Characterised By The Charging Evacuation (AREA)
EP81400798A 1980-06-25 1981-05-21 Procédé de régulation de l'amplitude de la pulsation dans un bac à pistonnage pneumatique Expired EP0042771B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8014080A FR2485397A1 (fr) 1980-06-25 1980-06-25 Procede de regulation de l'amplitude de la pulsation dans un bac a pistonnage pneumatique, et bacs a pistonnage mettant en oeuvre ledit procede
FR8014080 1980-06-25

Publications (2)

Publication Number Publication Date
EP0042771A1 EP0042771A1 (fr) 1981-12-30
EP0042771B1 true EP0042771B1 (fr) 1984-12-05

Family

ID=9243491

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400798A Expired EP0042771B1 (fr) 1980-06-25 1981-05-21 Procédé de régulation de l'amplitude de la pulsation dans un bac à pistonnage pneumatique

Country Status (7)

Country Link
US (1) US4342654A (enrdf_load_stackoverflow)
EP (1) EP0042771B1 (enrdf_load_stackoverflow)
CA (1) CA1174750A (enrdf_load_stackoverflow)
DE (1) DE3167568D1 (enrdf_load_stackoverflow)
FR (1) FR2485397A1 (enrdf_load_stackoverflow)
IN (1) IN152606B (enrdf_load_stackoverflow)
ZA (1) ZA814069B (enrdf_load_stackoverflow)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3150999C2 (de) * 1981-12-23 1985-06-20 Klöckner-Humboldt-Deutz AG, 5000 Köln Naß-Setzmaschine zur Aufbereitung von Kohle oder sonstigen Mineralien
US4586091A (en) * 1984-05-03 1986-04-29 Kalhas Oracle, Inc. System and method for high density data recording
CA1311218C (en) * 1986-06-27 1992-12-08 University Of Queensland Control of jig separators
US4902429A (en) * 1988-06-20 1990-02-20 Redux Corporation Gas assisted flotation process
US5055184A (en) * 1988-06-20 1991-10-08 Redux Corporation Gas assisted flotation apparatus
JPH03258341A (ja) * 1990-03-06 1991-11-18 Konica Corp 有機溶剤の除去方法
US5268128A (en) * 1990-05-25 1993-12-07 Westinghouse Electric Corp. Method and apparatus for cleaning contaminated particulate material
US5128068A (en) * 1990-05-25 1992-07-07 Westinghouse Electric Corp. Method and apparatus for cleaning contaminated particulate material
US5541831A (en) * 1993-04-16 1996-07-30 Oliver Manufacturing Co., Inc. Computer controlled separator device
AUPN531995A0 (en) * 1995-09-08 1995-10-05 University Of Queensland, The Dynamic monitoring and control of jigs
CN111889220B (zh) * 2020-07-13 2022-03-18 唐山开远科技有限公司 一种阶梯式跳汰机

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE467117A (enrdf_load_stackoverflow) *
GB425704A (en) * 1933-10-21 1935-03-20 Arthur Algernon Hirst Improvements in or relating to washer boxes for treating coal or other granular substances
FR946173A (fr) * 1947-04-23 1949-05-25 Prep Ind Combustibles Dispositif de production et de réglage de la pulsation d'un liquide dans un récipient surmonté d'une grille
US2846071A (en) * 1956-04-26 1958-08-05 Link Belt Co Washing jig
FR1465130A (fr) * 1966-01-21 1967-01-06 Westfalia Dinnendahl Machine de lavage pour la préparation du charbon ou d'autres matières minérales
FR1515865A (fr) * 1966-06-14 1968-03-08 Saint Gobain Techn Nouvelles Perfectionnements à la séparation d'un liquide et d'un solide ou liquide immiscible en suspension
US3822015A (en) * 1970-02-04 1974-07-02 Battelle Development Corp Separation of solids by varying the bulk density of a fluid separating medium
US4019981A (en) * 1973-10-20 1977-04-26 Klockner-Humboldt-Deutz Aktiengesellschaft Method and apparatus for the preparation of mineral mixtures on a jig controlled by compressed air
DE2539374C2 (de) * 1975-09-04 1982-12-02 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren und Vorrichtung zur Aufbereitung von Mineralgemischen, insbesondere von Rohwaschkohle auf einer druckluftgesteuerten Naßsetzmaschine
US4120783A (en) * 1977-07-05 1978-10-17 Baummer George P Apparatus and process for ordinary and submarine mineral beneficiation
FR2407748A1 (fr) * 1977-11-04 1979-06-01 Fives Cail Babcock Procede de commande et de regulation des bacs a pistonnage et systeme pour la mise en oeuvre de ce procede
DE2823148C2 (de) * 1978-05-26 1984-11-22 Klöckner-Humboldt-Deutz AG, 5000 Köln Automatisches Steuerungsverfahren für elektro-pneumatische Naßsetzmaschinen zur Trennung von Mineralgemischen, insbesondere Kohle
US4226714A (en) * 1978-12-27 1980-10-07 The Anaconda Company Thickener control system

Also Published As

Publication number Publication date
ZA814069B (en) 1982-07-28
DE3167568D1 (en) 1985-01-17
EP0042771A1 (fr) 1981-12-30
US4342654A (en) 1982-08-03
IN152606B (enrdf_load_stackoverflow) 1984-02-18
FR2485397B1 (enrdf_load_stackoverflow) 1982-07-23
FR2485397A1 (fr) 1981-12-31
CA1174750A (fr) 1984-09-18

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