LU84812A7 - Powder-carrier gas mixing device - esp. for injecting solid fuel into shaft furnace - Google Patents

Powder-carrier gas mixing device - esp. for injecting solid fuel into shaft furnace Download PDF

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Publication number
LU84812A7
LU84812A7 LU84812A LU84812A LU84812A7 LU 84812 A7 LU84812 A7 LU 84812A7 LU 84812 A LU84812 A LU 84812A LU 84812 A LU84812 A LU 84812A LU 84812 A7 LU84812 A7 LU 84812A7
Authority
LU
Luxembourg
Prior art keywords
powdered material
esp
shaft furnace
sleeves
housing
Prior art date
Application number
LU84812A
Other languages
French (fr)
Inventor
Legille Edouard
Original Assignee
Paul Wurth 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 Paul Wurth S.A. filed Critical Paul Wurth S.A.
Priority to LU84812A priority Critical patent/LU84812A7/en
Priority to AU19661/83A priority patent/AU557972B2/en
Priority to ES526192A priority patent/ES8406696A1/en
Priority to AR294508A priority patent/AR230884A1/en
Priority to DE8383110587T priority patent/DE3375698D1/en
Priority to EP83110587A priority patent/EP0108319B1/en
Priority to AT83110587T priority patent/ATE32525T1/en
Priority to CA000439963A priority patent/CA1225418A/en
Priority to PL1983244498A priority patent/PL137025B1/en
Priority to US06/550,565 priority patent/US4606677A/en
Priority to BR8306315A priority patent/BR8306315A/en
Publication of LU84812A7 publication Critical patent/LU84812A7/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/34—Details
    • B65G53/40—Feeding or discharging devices
    • B65G53/46—Gates or sluices, e.g. rotary wheels
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents
    • C21B5/003—Injection of pulverulent coal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
    • G01F11/10—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation
    • G01F11/12—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements
    • G01F11/20—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements wherein the measuring chamber rotates or oscillates
    • G01F11/24—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements wherein the measuring chamber rotates or oscillates for fluent solid material

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

The device comprises a housing (10) through which pressurised fluid flows axially and which is connected by a side opening (24) to a source of powdered material under a pressure greater than that of the fluid. The housing contains two coaxial sleeves (16,18), the inner sleeve have an axial bore (20) for passage of the fluid and at least one of the sleeves being rotatable about its longitudinal axis (O). The sleeves have apertures (30,32) at the level of the side opening (24) which can be aligned to define a passageway of adjustable size for connection of the powdered material source with the fluid flow in the inner sleeve. The device is used for metering powdered material into a propellant gas stream, esp. for injecting solid fuel into a shaft furnace. The device has relatively few moving parts so that the risks of escape of the powdered material and seizure of the device are reduced.

Description

Dispositif c * i.t T r je u : ~ o ; r. f.j. quantités casées de met i à-va-sDevice c * i.t T r je u: ~ o; r. f.j. cased quantities of met i to-va-s

La demande ce brevet principal Ko 84.462 concerne un dispositif d'introduction ce quantités dosées ce matières pulvérulentes dans un fluide de propulsion pneumatique, qui comporte un boîtier traversé, au moins en partie, axis-5 lement par un fluide sous pression comprenant une ouverture latérale en communication avec un réservoir de matières pulvérulentes, dans lequel règne une pression supérieure à celle du fluide de propulsion, ce boîtier renfermant ceux douilles coaxiales dont celle qui se trouve à l'intérieur 10 est pourvue d'un alésage axial pour le passage du fluide de 1 propulsion et dont l'une, au moins, est mobile autour de son axe longitudinal 0 et est reliée, à cet effet, à un dispositif d'entraînement approprié, chacune des douilles étant pourvue d'une fente au niveau de l'ouverture latéra-15 le du boîtier de façon que ces fentes puissent plus ou moins chevaucher ou se masquer mutuellement par rotation de la douille mobile et définir ainsi un passage plus ou moins grand entre le réservoir de matières pulvérulentes et le fluide de propulsion traversant la douille intérieure.The application for this main patent Ko 84,462 relates to a device for introducing this metered amount of this pulverulent material into a pneumatic propulsion fluid, which comprises a housing traversed, at least in part, axis-5 LEMENT by a pressurized fluid comprising a lateral opening in communication with a reservoir of pulverulent materials, in which there prevails a pressure greater than that of the propulsion fluid, this housing containing those coaxial sockets of which that which is inside 10 is provided with an axial bore for the passage of the fluid of 1 drive and at least one of which is movable about its longitudinal axis 0 and is connected, for this purpose, to a suitable drive device, each of the sockets being provided with a slot at the level of the latera-15 opening the housing so that these slots can more or less overlap or hide each other by rotation of the movable sleeve and thus define a more or less large passage ent re the pulverulent matter tank and the propulsion fluid passing through the inner bushing.

^ 20 Le but de la présente invention est de prévoir une variante du mode d'exécution de la demande de brevet principale, qui se caractérise par une baisse supplémentaire i du risque de grippage des surfaces latérales ces douilles de dosage.The object of the present invention is to provide a variant of the mode of execution of the main patent application, which is characterized by an additional reduction in the risk of seizure of the lateral surfaces of these metering sleeves.

’ * 25 Pour atteindre cet objectif, le dispositif décrit dans la demande de brevet principal est, selon la présente “ invention, essentiellement caractérisé en ce que la longueur des deux douilles correspond sensiblement au diamètre de l'ouverture latérale du boîtier, en ce qu'il I 30 est prévu entre le boîtier et la surface annulaire frcn- \ · taie de la douille mobile une bague annulaire de fnettement I %* 25 To achieve this objective, the device described in the main patent application is, according to the present “invention, essentially characterized in that the length of the two sockets corresponds substantially to the diameter of the lateral opening of the housing, in that 'There is provided between the housing and the annular surface frcn- \ · pillowcase of the movable sleeve an annular ring of I%

LL

5 esz , Ce préférence . ajustable.5 esz, This preference. adjustable.

D'sucras particularités ce l'invention ressortiront de 1s description détaillée d'un mode ce réalisation, présenté ci-dessous, à titre d'exemple, en réference aux dessins dans lesquels: 10 la figure 1 montre une coupe axiale à travers un 'dispositif selon la présente invention et la figure 2 montre une coupe transversale du dispositif au niveau des fentes de réglage, suivant le plan de coupe II-II de la figure 1.Of particular features of the invention will emerge from the detailed description of an embodiment of this embodiment, presented below, by way of example, with reference to the drawings in which: FIG. 1 shows an axial section through a device according to the present invention and FIG. 2 shows a cross section of the device at the level of the adjustment slots, along the section plane II-II of FIG. 1.

15 Le dispositif de dosage représenté à la figure 1 est monté à l'intérieur d'un boîtier cylindrique 10 de section ; carrée dont l'une des bases comporte une bride de fixation 12.The metering device shown in Figure 1 is mounted inside a cylindrical housing 10 of section; square, one of the bases of which has a fixing flange 12.

; Ce boîtier: 10 comporte deux ouvertures latérales 24 et 26 communiquant respectivement avec un réservoir de matières 20 pulvérulentes et une source d'air sous pression pour entraîner la matière pulvéruente dans une conduite de transport pneumatique non montrée.; This housing: 10 comprises two lateral openings 24 and 26 communicating respectively with a reservoir of pulverulent materials and a source of pressurized air for entraining the pulverulent material in a pneumatic conveying pipe not shown.

A l'intérieur du boîtier 10 se trouvent,au niveau de l'ouverture 24, les deux douilles de dosage 44 et 46 corres-25 pondant aux douilles de dosage décrites dans la demande de brevet principal . Dans l'exemple représenté, la douille 44 est fixe et solidaire du boîtier IG, tandis que la douille 46 est mobile autour de l'axe longitudinal O er forme l'extrémité avant d'un corps cylindrique 48 pouvant 30 tourner et coulisser longitudinalement dans un alésage du , boîtier 10. L'air sous pression est admis à travers une chambre annulaire 50 de ce corps 48 et la partie centrale creuse de celui-ci dans une chambre ce mélange 52 formée à l'intérieur de la douille intérieure 44 et se prolongeant 35 à travers l'axe du boîtier 10 vers une conduite de transport pneumatique non montrée.Inside the housing 10 are located, at the opening 24, the two metering sockets 44 and 46 corresponding to the metering sockets described in the main patent application. In the example shown, the sleeve 44 is fixed and integral with the IG housing, while the sleeve 46 is movable around the longitudinal axis O er forms the front end of a cylindrical body 48 which can rotate and slide longitudinally in a bore in the housing 10. The pressurized air is admitted through an annular chamber 50 of this body 48 and the hollow central portion of the latter in a chamber this mixture 52 formed inside the inner bushing 44 and extending through the axis of the housing 10 towards a pneumatic transport line not shown.

* l Les deux douilles 44 et 46 comportent respectivement J;‘ des fentes de dosage 54, 56 (voir également figure 2} dont ! _--c.-_xi.-n ts: c_.:.= nnn- par r;-;iv::r. a a ra aouilie nobile autour de l'axe C, Il ja décria eu. a Stall dans la 3 propose par _La Tirasarrza irvaaraor. ae c^iui *aa _. a cerar.ca a brevet principal résida cens la longueur axiale des douilles de dosage. Alors que selon la demande ce brevet principal ces douilles ont une longueur relativement importante pou.: isoler l'intérieur du doseur du réservoir ce matières 10 pulvérulentes, la longueur des douilles selon la présente invention est réduite au stricte minimum. Dans la demande de brevet principal , notamment dans la version de la figure 2, la matière pulvérulente pourrait pénétrer, sur la partie gauche des figures, entre la douille mobile et la sur-15 face intérieure du boîtier et entre la surface intérieure de la douille mobile et la surface extérieure ce la douille fixe, d'où cette poudre ne pouvait être sortie et augmentait les risques de grippage.* l The two sockets 44 and 46 respectively comprise J; 'metering slots 54, 56 (see also Figure 2} of which! _-- c.-_ xi.-n ts: c_.:.= nnn- par r; -; iv :: r. aa ra aouilie nobile around axis C, He ja decried eu. to Stall in the 3 proposed by _La Tirasarrza irvaaraor. ae c ^ iui * aa _. to cerar.ca has main patent resided as the axial length of the metering sleeves. While according to the request of this main patent these sleeves have a relatively large length for: isolating the interior of the metering unit from the container of powdery materials, the length of the sleeves according to the present invention is reduced in the strict minimum In the main patent application, in particular in the version of FIG. 2, the pulverulent material could penetrate, on the left part of the figures, between the movable sleeve and the inner surface of the housing and between the surface inside of the movable bushing and the outside surface of the fixed bushing, from which this powder could not come out tie and increased the risk of seizure.

Par contre, dans la version selon la présente inven-20 tion, la poudre pulvérulente peut pénétrer, tout au plus, entre les deux douilles mais, étant donné que, d'une part, cette surface est très réduite et, d'autre part, on peut : laisser un certain jeu entre ces deux douilles, les risques |, de grippage sont très réduits. Un certain jeu est, en • 25 effet, possible entre les deux douilles, étant donné que ! l'étanchéité est assurée, selon une autre caractéristique ; de l'invention, par une bague de frottement 58, par exemple !, réalisée en alliage de teflon et bronze, disposée, dans !: le mode de réalisation représenté, autour de la douille f \ 30 fixe 44 entre le boîtier 10 et l'extrémité ce la douille mobile 46. Cette douille mobile 46 est maintenue sous , l'action d'un ressort contre la bague 58.On the other hand, in the version according to the present invention, the pulverulent powder can penetrate, at most, between the two sockets but, since, on the one hand, this surface is very reduced and, on the other hand , you can: leave a certain play between these two sockets, the risks of seizing up are very reduced. A certain play is, in fact, possible between the two sockets, since! sealing is ensured, according to another characteristic; of the invention, by a friction ring 58, for example!, made of teflon and bronze alloy, arranged, in!: the embodiment shown, around the socket f \ 30 fixed 44 between the housing 10 and l the mobile bushing 46 ends. This mobile bushing 46 is held under the action of a spring against the ring 58.

: Le maintien élastique ce la douille 46 contre la bague 58 est assuré par un ressert 60, par exemple du type 35 "ressort Belleville" coince entre le corps 48 et un manchon i: „62. Ce manchon est fixe dans le sens axial mais peut tour- : ner autour de l'axe O grâce à son montage dans des rouie- j ment s c'4 et ces bagues d'étar. chéité 66, "6. L'action du ressort 60 s’exerce, par conséquent, sur le corps 48 et la douille 46 en direction de la bague de frotteront 5S. L'indépendance du mouvement longitudinal du corps 48 par 3 rapport au manchon 62 et la dépendance des mouvenenrs angulaires entre ces deux pièces peut être assurée par tout moyen connu, par exemple, tel que représente sur la figure à l'aide d'une clavette 68. La rotation du manchon 62, par exemple au moyen d'une manette telle que symbolisée par la 10 référence 70 provoque la rotation de la douille mobile 46 et un masquage plus ou moins grand des fentes 54 et 56 comme expliqué dans la demande de brevet principal.: The elastic retention that the sleeve 46 against the ring 58 is ensured by a spring 60, for example of the type 35 "Belleville spring" wedges between the body 48 and a sleeve i: „62. This sleeve is fixed in the axial direction but can rotate: around the axis O by virtue of its mounting in bearings s c'4 and these rings. cheeness 66, "6. The action of the spring 60 is therefore exerted on the body 48 and the sleeve 46 in the direction of the ring will rub 5S. The independence of the longitudinal movement of the body 48 relative to the sleeve 62 and the dependence of the angular movements between these two parts can be ensured by any known means, for example, as shown in the figure using a key 68. The rotation of the sleeve 62, for example by means of a handle as symbolized by the reference 70 causes the rotation of the movable sleeve 46 and more or less masking of the slots 54 and 56 as explained in the main patent application.

Dans un mode de réalisation préféré, la pression du ressort 60 est ajustable, par exemple au moyen d'une tige 15 de réglage 72 et d'un écrou de fixation 74.In a preferred embodiment, the pressure of the spring 60 is adjustable, for example by means of an adjustment rod 72 and a fixing nut 74.

Pour réduire encore davantage la longueur des douilles et, par la même occasion les risques de grippage, l'ouverture 24 peut être oblongue au lieu d'être circulaire.To further reduce the length of the sockets and, at the same time the risk of seizing, the opening 24 can be oblong instead of being circular.

Enfin, pour améliorer la résistance mécanique des 20 deux douilles, celles-ci sont avantageusement fabriquées en. tungstène fritté ce qui les rend extrêmement dures et usi-nables seulement par les meules diamantêes.Finally, to improve the mechanical strength of the two sockets, they are advantageously made of. sintered tungsten which makes them extremely hard and usable only by diamond wheels.

Il reste finalement à noter que, pour éviter que l'action du ressort 60 soit compensée ou annulée par la ' 25 pression de l'air admis dans la chambre 52, l'air sous pres sion est également admis à travers des canaux ou interstices 74 dans la chambre renfermant le ressort 60.Finally, it should be noted that, to prevent the action of the spring 60 from being compensated for or canceled out by the pressure of the air admitted into the chamber 52, the air under pressure is also admitted through channels or interstices 74 in the chamber containing the spring 60.

Comme dans la demande de brevet principal, il est également possible de prévoir la douille mobile à l'inté-gn rieur de la douille fixe.As in the main patent application, it is also possible to provide the movable bushing inside the fixed bushing.

**

NNOT

t-t-

Claims (4)

2. Dispositif selon la revendication 1, caractérisé en- que la tension du ressort (60) agissant sur la douille * mobile (46) est, de préférence, ajustable. ... f\2. Device according to claim 1, characterized in that the tension of the spring (60) acting on the movable bushing * (46) is preferably adjustable. ... f \ 3. Dispositif selon 11 ur.e ô: ; ro'-'-jUvllestions 1 ou 2, caractérisé en ce que les douilles sert réalisées en t un u s ter; e fritté.3. Device according to 11 ur.e ô:; ro '-'- jUvllestions 1 or 2, characterized in that the sockets serve made in t a u s ter; e sintered. 4. Dispositif selon la revan ileati on i, caractérisé 5 en ce que ladite ouverture (24) a uns ferre or longue dont le plus grand diamètre est perpendiculaire à l'axe ces douilles (44, 46).4. Device according to the revan ileati on i, characterized in that said opening (24) has a long golden ferrule whose largest diameter is perpendicular to the axis of these sockets (44, 46). 5. Application d'un dispositif selon l'une quel conque des revendications 1 à 4 dans une installation 10 d'injection de combustibles solides dans un four à cuve. t i '} ' Λ i ' 3 &5. Application of a device according to any one of claims 1 to 4 in an installation 10 for injecting solid fuels into a shaft furnace. t i '}' Λ i '3 &
LU84812A 1982-11-10 1983-05-19 Powder-carrier gas mixing device - esp. for injecting solid fuel into shaft furnace LU84812A7 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
LU84812A LU84812A7 (en) 1983-05-19 1983-05-19 Powder-carrier gas mixing device - esp. for injecting solid fuel into shaft furnace
AU19661/83A AU557972B2 (en) 1982-11-10 1983-09-28 Device to introduce dosed quantities of pulverulent substances into a pneumatic propulsion fluid and use to inject solid fuels into a furnace
ES526192A ES8406696A1 (en) 1982-11-10 1983-10-01 Injection arrangement of dosed quantities of pulverulent materials in a pneumatic propulsion fluid and application to the injection of solid fuels into a shaft furnace.
AR294508A AR230884A1 (en) 1982-11-10 1983-10-11 DEVICE FOR INTRODUCING DOSAGE AMOUNTS OF POWDER MATERIALS IN A PNEUMATIC PROPULSION FLUID, PREFERRED TO BE INJECTED INTO SOLID FUELS IN A CUBA OVEN
DE8383110587T DE3375698D1 (en) 1982-11-10 1983-10-24 Injection arrangement of dosed quantities of pulverulent materials in a pneumatic propulsion fluid and application to the injection of solid fuels into a shaft furnace
EP83110587A EP0108319B1 (en) 1982-11-10 1983-10-24 Injection arrangement of dosed quantities of pulverulent materials in a pneumatic propulsion fluid and application to the injection of solid fuels into a shaft furnace
AT83110587T ATE32525T1 (en) 1982-11-10 1983-10-24 DEVICE FOR FEEDING DOSED QUANTITIES OF GRAINY SOLIDS INTO A PNEUMATIC PROPULSION FLUID AND APPLICATION FOR FEEDING SOLID FUEL INTO A SHAFT FURNACE.
CA000439963A CA1225418A (en) 1982-11-10 1983-10-28 Device for the introduction of dosed quantities of pulverulent substances into a pneumatic propulsion fluid and use thereof for the injection of solid fuels into a shaft furnace
PL1983244498A PL137025B1 (en) 1982-11-10 1983-11-10 Apparatus for producing homogenous mixture of pourable solid materials and gases
US06/550,565 US4606677A (en) 1982-11-10 1983-11-10 Device for introducing dosed quantities of pulverized solid materials into a carrier gas stream
BR8306315A BR8306315A (en) 1982-11-10 1983-11-10 DEVICE FOR THE INTRODUCTION OF DOSED QUANTITIES OF PULVERULENT MATERIALS IN A PNEUMATIC PROPULSION FLUID

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU84812A LU84812A7 (en) 1983-05-19 1983-05-19 Powder-carrier gas mixing device - esp. for injecting solid fuel into shaft furnace
LU84812 1983-05-19

Publications (1)

Publication Number Publication Date
LU84812A7 true LU84812A7 (en) 1985-03-21

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Application Number Title Priority Date Filing Date
LU84812A LU84812A7 (en) 1982-11-10 1983-05-19 Powder-carrier gas mixing device - esp. for injecting solid fuel into shaft furnace

Country Status (1)

Country Link
LU (1) LU84812A7 (en)

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