EP0488098B1 - Anordnung zum Tragen und Führen eines Tauchrohrs in einem Kessel mit zirkulierendem Wirbelbett - Google Patents

Anordnung zum Tragen und Führen eines Tauchrohrs in einem Kessel mit zirkulierendem Wirbelbett Download PDF

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Publication number
EP0488098B1
EP0488098B1 EP91120037A EP91120037A EP0488098B1 EP 0488098 B1 EP0488098 B1 EP 0488098B1 EP 91120037 A EP91120037 A EP 91120037A EP 91120037 A EP91120037 A EP 91120037A EP 0488098 B1 EP0488098 B1 EP 0488098B1
Authority
EP
European Patent Office
Prior art keywords
skirt
arrangement according
shoe
arrangement
cyclone
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
EP91120037A
Other languages
English (en)
French (fr)
Other versions
EP0488098A1 (de
Inventor
Jean Aubry
André Teton
Jean-Paul Tessier
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.)
Stein Industrie SA
Original Assignee
Stein Industrie SA
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Filing date
Publication date
Application filed by Stein Industrie SA filed Critical Stein Industrie SA
Publication of EP0488098A1 publication Critical patent/EP0488098A1/de
Application granted granted Critical
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Anticipated expiration legal-status Critical
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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
    • B04C5/20—Apparatus in which the axial direction of the vortex is reversed with heating or cooling, e.g. quenching, means
    • 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
    • B04C5/08—Vortex chamber constructions
    • 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
    • B04C5/12—Construction of the overflow ducting, e.g. diffusing or spiral exits
    • B04C5/13—Construction of the overflow ducting, e.g. diffusing or spiral exits formed as a vortex finder and extending into the vortex chamber; Discharge from vortex finder otherwise than at the top of the cyclone; Devices for controlling the overflow

Definitions

  • the present invention relates to an arrangement for supporting and guiding a cyclone skirt, in particular in a circulating fluidized bed boiler.
  • the gas charged with particles such as ashes, sands, coals ... is injected into the cyclone where it comes around the skirt which is a cylinder of frustoconical shape.
  • the gas is then driven in rotation around the skirt and the particles fall to the bottom of the cyclone body, the gas escaping through the skirt.
  • the temperature inside the cyclone can reach around 900 ° C, the skirt can have a diameter of around 4 meters and weigh up to around 4 tonnes.
  • the cyclone skirt is simply placed by means of an annular flange on the shoulder formed in the upper part of the cyclone body and made of refractory material.
  • the skirt and in particular its support flange tend to deform and the weight of the skirt is then no longer transmitted uniformly. to the carrier refractory material. Subjected then to too great efforts, the refractory material splits then breaks, which leads to a bad oblique position of the skirt and even in the extreme case to the fall of the skirt.
  • Patent document GB-A-2124932 describes an arrangement of a cyclone skirt intended to solve the problems of disassembling the skirt and of deformations due to thermal stresses. To do this, the skirt is divided into independent segments supported in the detachable upper part, by pieces welded to the wall of the cyclone or by direct bolting.
  • the object of the present invention is to solve these problems by proposing a support arrangement and also for guiding a skirt in one piece, eliminating the direct support of the skirt on the refractory material.
  • the present invention relates to an arrangement for supporting and guiding the skirt of a cyclone in particular in a circulating fluidized bed boiler remarkable in that it comprises at least three metallic elements known as shoes passing through the cyclone body, distributed regularly over the periphery of the cyclone body in a horizontal plane, and the inner end of which supports the upper part of the skirt thanks to a horizontal annular flange arranged on the skirt and resting on the shoes.
  • the arrangement allows the skirt to be maintained at its periphery and thus limits its deformation.
  • the shoes thus arranged in a crown and in sufficient number allow the upper part of the skirt to be held on its periphery. There are at least three hooves to do this.
  • the shoes are retractable.
  • the insertion of each shoe towards the inside of the cyclone can be adjustable. It is thus possible to adjust the positioning of the axis of the skirt.
  • each shoe can be placed in a sheath secured to the metal casing of the cyclone body.
  • the inner end of the shoes is inserted into housings provided in the upper part of the skirt.
  • housings provided in the upper part of the skirt.
  • the housings provided in the upper part of the skirt are formed by a second horizontal annular flange arranged in the upper part of the skirt and by vertical spacers arranged between the two flanges.
  • Each shoe preferably has a hollow structure reinforced with internal walls; these internal walls can be arranged in a baffle, each shoe comprising inlet and outlet orifices intended for the passage of a cooling fluid; preferably, the cooling fluid is air or water.
  • the internal walls have the function of allowing the reinforcement and stiffening of the hooves so that they have sufficient bearing properties.
  • a sealing device may be provided consisting of pieces of crown fixed on the upper flange of the skirt and inserted in a lining of refractory material housed in the cyclone body; preferably, these crown pieces will be made of refractory material.
  • the skirt 1 is shown diagrammatically, the cyclone body 2 and two preferably metallic support elements 3 of the skirt. These support elements 3 which will be called shoes pass through the wall of the cyclone body and are housed between two annular flanges arranged in the upper part of the skirt 1. These shoes 3, as will be seen below, are retractable.
  • FIG. 2 represents in horizontal section, the arrangement of three shoes 3 distributed regularly over the periphery of the skirt 1. Preferably there are three shoes 3 but more than three shoes 3 can be provided.
  • FIGS. 3 and 4 is shown in detail a shoe 3 and the corresponding arrangement of the cyclone body 2 and of the skirt 1.
  • the skirt 1 has at its upper part two annular flanges, one upper 4 and the other 5 located below the first. Between these two flanges 4, 5 are arranged vertical spacers 6 which define a housing intended to receive the interior end 7 of the shoe 3. It is quite obvious that such housings are provided in positions corresponding to those of the shoes 3 and in identical number.
  • the skirt has only an upper annular flange 4 bearing on the shoes 3.
  • the shoe 3 consists of a hollow metal part which, in horizontal plane, has inclined walls narrowing its section to facilitate its disassembly.
  • the support and the guide of the shoe 3 is produced by a sheath 10 preferably made of metal which is integral with the metal casing 20 of the cyclone body.
  • the shoe 3 therefore rests on the lower part of the sheath 10.
  • Sealing elements 8, 9, 11 are placed at the end of the sleeve 10, on the inside of the cyclone. These elements 8, 9, 11 are made of flexible insulating refractory material.
  • crown pieces 13 are inserted in the lining 11 and are fixed to the upper flange 4 of the skirt 1. This fixing is preferably carried out by bolting in the flange 4 with the interposition of a reinforcement piece 14.
  • a metal flange 15 over the entire periphery of the sheath 10.
  • This flange 15 serves as a stop, with the interposition of a seal with a flange 16 fixed, preferably by welding on the periphery of the shoe 3.
  • the stop of the flanges 15 and 16 defines the maximum insertion position of the shoe 3 in the housing arranged in the skirt 1. In this position the shoe 3 is made integral with the sheath 10 preferably by bolting the flanges 15 and 16.
  • the skirt 1 can be released by lifting upwards, using a hoist or other device, in order to deposit or replace it.
  • shoe 3 The internal structure of shoe 3 is particularly visible in FIG. 4.
  • These walls 17 have a double function. They define a chicane circuit intended to convey a cooling fluid inside the shoe 3.
  • the outer end of the shoe 3 has an adequate number of orifices, in the example shown three, including two inlet orifices 18 and an outlet orifice 19.
  • the cooling fluid is therefore sent under pressure to the holes 18 and comes out through the hole 19.
  • This cooling fluid can be cold air or water for example. In the case of the use of dry air this air can possibly be returned inside the cyclone.
  • the walls 17 also have a function of reinforcing the structure of the shoe 3, forming stiffening ribs.

Landscapes

  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Cyclones (AREA)
  • Investigating Or Analysing Biological Materials (AREA)

Claims (11)

  1. Träger- und Führungsanordnung eines Zyklonmantels, insbesondere in einem Kessel mit zirkulierendem Wirbelbett, dadurch gekennzeichnet, daß sie mindestens drei metallische Elemente (3), "Schuhe" genannt, aufweist, die den Zyklonkörper (2) durchqueren sowie regelmäßig auf dem Umfang des Zyklonkörpers (2) in einer waagrechten Ebene verteilt sind und deren inneres Ende (7) den oberen Bereich des Mantels (1) über einen ringförmigen waagrechten Flansches (4) trägt, der auf dem Mantel (1) angeordnet ist und auf den Schuhen (3) aufliegt.
  2. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Schuhe (3) lösbar sind.
  3. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß die radiale Lage jedes Schuhs (3) im Inneren des Zyklons einstellbar ist.
  4. Anordnung nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß jeder Schuh (3) in einer Hülse (10) angeordnet ist, die fest mit der metallischen Hülle (20) des Zyklonkörpers (2) verbunden ist.
  5. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß das Ende (7) der Schuhe (3) in Räume eingefügt ist, die im oberen Bereich des Mantels vorgesehen sind.
  6. Anordnung nach Anspruch 5, dadurch gekennzeichnet, daß die im oberen Bereich des Mantels (1) vorgesehenen Räume von einem zweiten waagrechten ringförmigen Flansch (5), der im oberen Bereich des Mantels (1) angeordnet ist, und von senkrechten Zwischenstücken (6) gebildet werden, die zwischen den beiden Flanschen (4, 5) angeordnet sind.
  7. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß jeder Schuh (3) eine hohle Struktur hat, die durch Innenwände (17) verstärkt ist.
  8. Anordnung nach Anspruch 7, dadurch gekennzeichnet, daß die Innenwände (17) schikanenförmig angeordnet sind, wobei jeder Schuh (3) Einlaß- und Auslaßöffnungen (18, 19) aufweist, die für den Durchlaß eines Kühlfluids bestimmt sind.
  9. Anordnung nach einem beliebigen der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine Dichtvorrichtung zwischen dem Mantel (1) und dem hitzebeständigen Material (12) des Zyklonkörpers (2) vorgesehen ist.
  10. Anordnung nach Anspruch 9, dadurch gekennzeichnet, daß die Dichtvorrichtung aus Ringstücken (13) besteht, die am oberen Flansch (4) des Mantels befestigt und in eine Armatur aus hitzebeständigem Material (11) eingefügt sind, die sich im Zyklonkörper (2) befindet.
  11. Anordnung nach Anspruch 10, dadurch gekennzeichnet, daß die Ringstücke (13) aus hitzebeständigem Material bestehen.
EP91120037A 1990-11-27 1991-11-25 Anordnung zum Tragen und Führen eines Tauchrohrs in einem Kessel mit zirkulierendem Wirbelbett Expired - Lifetime EP0488098B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9014807A FR2669559B1 (fr) 1990-11-27 1990-11-27 Agencement de support et de guidage d'une jupe de cyclone dans une chaudiere a lit fluidise circulant.
FR9014807 1990-11-27

Publications (2)

Publication Number Publication Date
EP0488098A1 EP0488098A1 (de) 1992-06-03
EP0488098B1 true EP0488098B1 (de) 1994-12-14

Family

ID=9402635

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91120037A Expired - Lifetime EP0488098B1 (de) 1990-11-27 1991-11-25 Anordnung zum Tragen und Führen eines Tauchrohrs in einem Kessel mit zirkulierendem Wirbelbett

Country Status (9)

Country Link
US (1) US5160516A (de)
EP (1) EP0488098B1 (de)
JP (1) JP3003885B2 (de)
AT (1) ATE115439T1 (de)
DE (1) DE69105928T2 (de)
ES (1) ES2066322T3 (de)
FI (1) FI100387B (de)
FR (1) FR2669559B1 (de)
ZA (1) ZA919324B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5868809A (en) * 1997-09-18 1999-02-09 Combustion Engineering, Inc. Cyclone refractory system
DE102010007936A1 (de) * 2010-02-12 2011-08-18 Outotec Oyj Tauchrohrabtragung und Zyklon hiermit
KR101319030B1 (ko) * 2010-12-23 2013-10-15 주식회사 포스코 소용돌이 튜브 및 그의 지지방법
CN102320511B (zh) * 2011-08-23 2014-10-08 浙江科技学院 一种电梯轿厢非接触式信息传输装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1235174A (en) * 1915-09-22 1917-07-31 Williams Patent Crusher & Pulv Pneumatic separator.
US1542866A (en) * 1921-05-09 1925-06-23 Ruggles Coles Engineering Comp Dust collector
GB212493A (en) * 1923-09-28 1924-03-13 Albert C Evans Improvements in printer's chase
US3327456A (en) * 1964-04-30 1967-06-27 Exxon Research Engineering Co High temperature cyclone
DE3228902A1 (de) * 1982-08-03 1984-02-09 Klöckner-Humboldt-Deutz AG, 5000 Köln Zyklonabscheider

Also Published As

Publication number Publication date
ES2066322T3 (es) 1995-03-01
DE69105928T2 (de) 1995-05-04
EP0488098A1 (de) 1992-06-03
ATE115439T1 (de) 1994-12-15
JP3003885B2 (ja) 2000-01-31
JPH05264014A (ja) 1993-10-12
ZA919324B (en) 1992-09-30
FI915540A (fi) 1992-05-28
FI100387B (fi) 1997-11-28
FR2669559A1 (fr) 1992-05-29
DE69105928D1 (de) 1995-01-26
FR2669559B1 (fr) 1993-06-25
US5160516A (en) 1992-11-03
FI915540A0 (fi) 1991-11-25

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