EP0950856B1 - Abscheider für brennbare Partikel oberhalb eines Heizkessels mit einem Absperrventil - Google Patents

Abscheider für brennbare Partikel oberhalb eines Heizkessels mit einem Absperrventil Download PDF

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Publication number
EP0950856B1
EP0950856B1 EP99400925A EP99400925A EP0950856B1 EP 0950856 B1 EP0950856 B1 EP 0950856B1 EP 99400925 A EP99400925 A EP 99400925A EP 99400925 A EP99400925 A EP 99400925A EP 0950856 B1 EP0950856 B1 EP 0950856B1
Authority
EP
European Patent Office
Prior art keywords
separator
valve member
boiler
particles
grinder
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
EP99400925A
Other languages
English (en)
French (fr)
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EP0950856A1 (de
Inventor
Claude Amieux
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.)
Alstom Holdings SA
Original Assignee
Alstom Holdings 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 Alstom Holdings SA filed Critical Alstom Holdings SA
Publication of EP0950856A1 publication Critical patent/EP0950856A1/de
Application granted granted Critical
Publication of EP0950856B1 publication Critical patent/EP0950856B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/24—Passing gas through crushing or disintegrating zone
    • B02C23/32—Passing gas through crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
    • B07B11/06—Feeding or discharging arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/01—Selective separation of solid materials carried by, or dispersed in, gas currents using gravity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
    • B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2201/00—Pretreatment of solid fuel
    • F23K2201/30—Separating

Definitions

  • the invention relates to a separator arranged between a grinder and a boiler to select the size of the particles produced by grinding a fuel in the crusher and transported by flow air from the mill to the separator and then to the boiler, which extends in an axial direction and which comprises compartments of outlet each surmounted by a transport pipe connecting the separator at the boiler.
  • Such a separator is used in particular for separating particles of coal and allow the boiler to be supplied with particles smaller than a reference size.
  • the particles larger than the reference size are recycled to the crusher to be ground again with charcoal departure.
  • Transport of particles from the mill to the separator then towards the boiler is carried out by air flow channeled by transport lines. It is known to feed the home of the boiler through several pipes. For this reason, the separator usually has compartments of outlet which are each surmounted by a transport pipe connecting the separator at the boiler.
  • each hatch operates in barrier air overpressure by relative to the upstream and downstream pressure of the pipe on which it is mounted to close with a perfect seal.
  • Transport lines connecting the separator to the boiler are closed during certain operating operations.
  • the object of the invention is to reduce the cost of isolating the transport lines which connect a separator of combustible particles to a boiler in a grinding installation.
  • the idea behind the invention is to reduce the number of hatches.
  • the subject of the invention is a separator intended to be disposed between a grinder and a boiler and used to select in particle size produced by grinding a fuel in the grinder and transporting said particles by air flow from the crusher to the separator manufactured by the crusher and, from the separator to the boiler, said particles selected by the separator of a size less than a size for reference, the largest particles being recycled to the mill, separator extending in an axial direction A and comprising a body separator comprising at its lower end a compartment inlet communicating with the grinder and at its upper end, a distribution box comprising particle outlet compartments selected each topped by a transport pipe connecting the separator at the boiler, characterized in that the separator comprises inside the separator body a wall channeling the incoming flow towards the top of the separator, towards particle size selection means crushed, in that said distribution box penetrates inside said wall channeling said flow, and in that a single isolation valve is mounted movable inside the separator and is moved in translation according to the axial direction to close off or on the contrary allow the
  • the isolation valve allows the pipes to be closed together. transport mounted on the separator outlet compartments. Of this way, we reduce the number of isolation valves to the number of separators of the grinding plant, regardless of the number of lines of transport of each separator.
  • the isolation valve of a valve tube which communicates with a pressurized enclosure located outside the separator.
  • the isolation valve has two braced blades integral with the valve tube which is provided with openings arranged between the two blades to allow a passage of barrier air and thus overpressure the valve isolation from the outlet compartments to guarantee a perfect seal between the pipes and the separator.
  • the isolation valve has two braced blades integral with the valve tube which is provided with openings arranged at the base of one of the two blades for allow the passage of barrier air and thus overpressure the isolation valve with respect to two compartments of adjacent outlets to ensure a perfect seal between the two corresponding pipes.
  • FIG. 1A shows in section a separator in which a isolation valve mounted movable in translation in a direction axial of the separator occupies an open position.
  • Figure 1B shows in section the separator of Figure 1A, in which the isolation valve occupies a closed position.
  • Figure 2 shows in section the isolation valve with two braced blades integral with a valve tube.
  • Figure 3 shows in partial section two compartments of adjacent outlet in the separator.
  • FIG. 4A shows in partial section a sealing valve barrier air in a separator pressurization enclosure when the isolation valve is in the closed position.
  • FIG. 4B shows in partial section the sealing valve of FIG. 4A when the isolation valve is in the open position.
  • a separator comprises, in FIG. 1, a separator body 1 substantially frustoconical which extends in an axial direction A.
  • the separator is arranged vertically and communicates in its lower part with a grinder through an inlet compartment 3, and in its upper part, with a boiler via a distribution box 5 which includes for example four compartments outlet 7 arranged symmetrically around the axis A of the separator 1.
  • the separator is designed to select the size of coal particles obtained by grinding the fuel in the mill and transported by an air flow from the mill to the separator then to the boiler. It includes an inlet cone 11 surmounted by inner walls 9 to direct the incoming flow 13A towards the top of the separator 1. Fineness flaps 15 make a size selection particles transported by the flow. Those whose size is smaller than a reference size imposed by the flaps are carried by an upward flow 13B channeled through the compartments outlet 7 of the distribution box 5, while the others flow by gravity along the internal walls 9 then inside the inlet cone 11. Flaps 17 mounted on the inlet cone direct these particles to the inlet compartment 3.
  • an isolation valve 21 is mounted movable at inside the separator 1 and is moved in translation along the axial direction A to allow or prevent the passage of air flow and particles through each outlet compartment 7 topped one of the transport lines 19.
  • the isolation valve 21 is conical in shape to seal each outlet compartment 7 in based both on the base 5A of the distribution box 5 and on the four junction edges 7A of the four outlet compartments 7.
  • the isolation valve 21 is integral with a tube valve 23 which slides in a guide bearing 22 according to the axial direction A via a control rod 25 actuated by a pneumatic cylinder 27 mounted outside the separator 1.
  • a single pneumatic cylinder is sufficient to move the isolation valve to open or close the compartments output 7. This saves resources.
  • the valve tube 23 is in communication with an enclosure pressurized 29 which is arranged outside the separator 1 for easily communicate with a barrier air source by via an input 29A.
  • the pressurized enclosure 29 extends in the axial direction A and is fixed to the distribution box 5 to support the pneumatic cylinder 27.
  • the control rod 25 is guided by the guide bearing 22.
  • the isolation valve 21 has two braced conical blades 21A and 21B integral of the valve tube 23.
  • the latter is provided with openings 23A arranged between the two braced blades 21A and 21B to allow a first passage of barrier air injected by the pressurized enclosure 29.
  • the isolation valve 21 is in the closed position. Looks like barrier injected by the pressurized enclosure 29 via the valve tube 23 and the openings 23A and 23B create an overpressure between the two braced blades 21A and 21B in relation to the prevailing pressure in separator 1. For example, the overpressure is equal to 1000Pa. In this way, any passage of a flow between the isolation valve 21 and the base 5A of the distribution box 5, which ensures total tightness. between the separator and each of the transport lines 19.
  • valve tube 23 has openings 23B at the base of one 21A of the two blades braced to allow a second passage of barrier air injected through the pressurized enclosure 29.
  • the isolation valve is in the closed position.
  • the air of dam injected by the pressurized enclosure 29 via the valve tube 23 and the openings 23A and 23B create an overpressure in a groove 7B of each junction edge 7 between two compartments adjacent outlet 7.
  • Overpressure relative to the pressure which reigns in the transport lines 19 is of the same order of magnitude than previously, for example 1000Pa. Of this way, it prevents any passage of a flow between two compartments adjacent, which guarantees a total seal between the two transport lines 19 mounted on these two compartments Release.
  • a valve air barrier 31 is mounted integral with the rod control 25 to isolate the valve tube 23 from the enclosure pressurized 29 when the isolation valve 21 is in position opened.
  • the barrier air sealing valve 31 is formed at the end of the control rod 25 and slides inside a cylinder 33 integral with the valve tube 23.
  • the cylinder 33 has openings 33A and 33B to allow passage of barrier air from the pressurized enclosure 29 inside the valve tube 23.
  • the sealing valve 31 is in the open position and the barrier air can flow towards the isolation valve 21. It is in high stop against the cylinder 33 while being supported by the rod control 25 which has moved under the action of the pneumatic cylinder 27 to place the isolation valve 21 in the closed position.
  • the cylinder 33 is retained against the force of the sealing valve 31 by the tube valve 23 and by the isolation valve 21 which is in abutment against the guide bearing 22.
  • the barrier air sealing valve 31 is in closed position. It is pressed into abutment against the valve tube 23 by the control rod 25 which has moved under the action of the jack pneumatic 27 for placing the isolation valve 21 in position opening.
  • the sealing valve 31 prevents the passage of air from barrier in the valve tube 23 when the isolation valve 21 is in the open position, and allows the use of barrier air only when the isolation valve 21 is raised to the closed position. We thus achieves a saving in the barrier air necessary for obtaining a perfect seal between the separator and the compartments of exit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Refuse Collection And Transfer (AREA)
  • Sliding Valves (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Disintegrating Or Milling (AREA)

Claims (8)

  1. Separator (1), der dazu bestimmt ist, zwischen einem Zerkleinerer und einem Kessel angeordnet zu werden und genutzt wird, um Partikel, die durch Zerkleinern eines Brennstoffs im Zerkleinerer erzeugt wurden, nach Größe zu sortieren, wobei die durch den Zerkleinerer erzeugten Partikel durch Luftstrom vom Zerkleinerer in Richtung auf den Separator, und die durch den Separator sortierten Partikel vom Separator in Richtung auf den Kessel transportiert werden, welche sortierten Partikel eine Größe haben, die kleiner als eine Bezugsabmessung ist, wobei die gröbsten Partikel in Richtung auf den Zerkleinerer zurückgeführt werden, wobei sich der Separator in einer axialen Richtung A erstreckt und einen Separatorkörper (1) umfasst, der an seinem unteren Ende ein Eingangsabteil (3) aufweist, das mit dem Zerkleinerer in Verbindung steht, und an seinem oberen Ende ein Verteilungsgehäuse (5) aufweist, das Abteile (7) für den Austrag der sortierten Partikel umfasst, die jeweils von einer Transportleitung (19) überragt sind, die den Separator (1) mit dem Kessel verbindet, dadurch gekennzeichnet, dass der Separator im Inneren des Separatorkörpers (1) eine Wand (11, 9) aufweist, die den eintretenden Fluss (15A) in Richtung auf den Scheitel des Separators, in Richtung auf Mittel zum Sortieren der zerkleinerten Partikel nach Größe kanalisiert, dass das Verteilungsgehäuse (5) ins Innere der Wand (9) eindringt, die den Fluss kanalisiert, und dass ein einziges Isolierventil im Inneren des Separators (1) beweglich angebracht ist und in Translation in der axialen Richtung (A) verlagert wird, um den Durchfluss des Luftstroms (13B) abzusperren oder im Gegensatz dazu zu gestatten, welcher Luftstrom mit sortierten Partikeln angereichert ist, in Richtung auf das Verteilungsgehäuse (5) und die Austragabteile (7), die jeweils mit einer Leitung (19) für den Transport zum Kessel verbunden sind.
  2. Separator nach Anspruch 1,
    in dem das Isolierventil (21) mit einem Ventilrohr (23) fest verbunden ist, das in Translation in der axialen Richtung (A) mittels einer Steuerstange (25) verlagert wird, die durch eine Hebevorrichtung (27) betätigt wird, die außerhalb des Separators (1) angebracht ist.
  3. Separator nach Anspruch 2,
    in dem das Ventilrohr (23) mit einem Druckraum (29) in Verbindung steht, der außerhalb des Separators (1) angeordnet ist und einen Eingang (29A) hat, um mit einer Stauluftquelle in Verbindung zu stehen.
  4. Separator nach Anspruch 3,
    in dem das Isolierventil (21) zwei versteifte konische Platten (21A, 21B) besitzt, die mit dem Ventilrohr (23) fest verbunden sind, das mit Öffnungen (23A) versehen ist, die zwischen den beiden versteiften Platten angeordnet sind.
  5. Separator nach Anspruch 4,
    in dem das Ventilrohr (23) Öffnungen (23B) an der Basis der einen (21A) der beiden versteiften Platten des Ventils besitzt.
  6. Separator nach einem der Ansprüche 3 bis 5,
    in dem ein Stauluft-Abdichtventil (31) fest mit der Steuerstange verbunden ist, um das Ventilrohr (23) des Druckraumes (29) dann zu isolieren, wenn das Isolierventil (21) in Offenstellung ist.
  7. Separator nach Anspruch 6,
    in dem das Abdichtventil (31) innerhalb eines Zylinders (33), der mit dem Ventilrohr (33) fest verbunden ist, gleitet.
  8. Separator nach Anspruch 7,
    in dem der Zylinder (33) Öffnungen (33A, 33B) besitzt.
EP99400925A 1998-04-16 1999-04-15 Abscheider für brennbare Partikel oberhalb eines Heizkessels mit einem Absperrventil Expired - Lifetime EP0950856B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9804749 1998-04-16
FR9804749A FR2777476B1 (fr) 1998-04-16 1998-04-16 Separateur de particules combustibles dispose en amont d'une chaudiere et comportant un unique clapet d'isolement

Publications (2)

Publication Number Publication Date
EP0950856A1 EP0950856A1 (de) 1999-10-20
EP0950856B1 true EP0950856B1 (de) 2003-08-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP99400925A Expired - Lifetime EP0950856B1 (de) 1998-04-16 1999-04-15 Abscheider für brennbare Partikel oberhalb eines Heizkessels mit einem Absperrventil

Country Status (7)

Country Link
US (1) US6231273B1 (de)
EP (1) EP0950856B1 (de)
JP (1) JPH11347494A (de)
DE (1) DE69910104D1 (de)
ES (1) ES2203027T3 (de)
FR (1) FR2777476B1 (de)
ZA (1) ZA992746B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107708867A (zh) * 2015-03-18 2018-02-16 Pms商业有限公司 粉碎装置

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DE19923109A1 (de) * 1999-05-19 2000-11-23 Bbp Energy Gmbh Zentrifugalsichter
ATE356065T1 (de) * 2003-06-23 2007-03-15 Mann & Hummel Protec Gmbh Unterdruckbehälter mit aktiver schnellentleerungsventilsteuerung
US20110308437A1 (en) * 2010-06-18 2011-12-22 William Latta External pulverized coal classifier
CA2830535C (en) * 2011-03-24 2018-12-04 Babcock Power Services, Inc. Coal flow distribution controllers for coal pulverizers
EA023078B1 (ru) * 2012-08-24 2016-04-29 Открытое акционерное общество "ТЯЖМАШ" Делитель пыли
CA2834032A1 (en) * 2012-12-05 2014-06-05 Coal Milling Projects (Pty) Limited A classifier and a method of modifying a classifier for use with a pulveriser
JP6165593B2 (ja) * 2013-11-01 2017-07-19 三菱日立パワーシステムズ株式会社 竪型ローラミル
JP6045478B2 (ja) * 2013-11-22 2016-12-14 三菱日立パワーシステムズ株式会社 竪型ローラミル
US10722898B2 (en) 2013-11-01 2020-07-28 Mitsubishi Hitachi Power Systems, Ltd. Vertical roller mill
CN105698206B (zh) * 2014-11-28 2018-09-07 国家电网公司 磨煤机出口速关门装置及磨煤机制粉系统
CN106540881A (zh) * 2016-10-20 2017-03-29 云南冶金新立钛业有限公司 用于分选粉尘物料的系统

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Publication number Priority date Publication date Assignee Title
CN107708867A (zh) * 2015-03-18 2018-02-16 Pms商业有限公司 粉碎装置

Also Published As

Publication number Publication date
ZA992746B (en) 2000-01-31
EP0950856A1 (de) 1999-10-20
DE69910104D1 (de) 2003-09-11
US6231273B1 (en) 2001-05-15
JPH11347494A (ja) 1999-12-21
ES2203027T3 (es) 2004-04-01
FR2777476A1 (fr) 1999-10-22
FR2777476B1 (fr) 2000-06-23

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