EP0037460B1 - Process and installation for regulating pressure and fluidisation of a pulverized mass in a distribution container - Google Patents

Process and installation for regulating pressure and fluidisation of a pulverized mass in a distribution container Download PDF

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Publication number
EP0037460B1
EP0037460B1 EP19810101434 EP81101434A EP0037460B1 EP 0037460 B1 EP0037460 B1 EP 0037460B1 EP 19810101434 EP19810101434 EP 19810101434 EP 81101434 A EP81101434 A EP 81101434A EP 0037460 B1 EP0037460 B1 EP 0037460B1
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EP
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Prior art keywords
enclosure
pressure
gas
accordance
intermediate tank
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Expired
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EP19810101434
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German (de)
French (fr)
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EP0037460A1 (en
Inventor
Léon Ulveling
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Paul Wurth SA
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Paul Wurth SA
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Priority to AT81101434T priority Critical patent/ATE4914T1/en
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    • 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

Definitions

  • the present invention relates to a method and a device for regulating the pressure and fluidization of a pulverulent mass in a pressure distribution enclosure which is provided on the downstream side with a series of orifices for extracting the pulverulent material and connected, on the upstream side, to an intermediate powder supply tank which is designed as an airlock to be alternately ventilated and put under a pressure substantially equal to or greater than the pressure in said enclosure and to be placed in communication with the latter.
  • the invention relates more particularly to an installation of the type described in patent LU-A-81,388, designed for the injection of coal or lignite powder into a blast furnace.
  • the coal or lignite powder is extracted by the bottom of the enclosure through the extraction orifices provided with blast chambers with a cellular rotor to be then conveyed pneumatically to each of the nozzles of the blast furnace and be injected into it.
  • the object of the present invention is a new process for fluidizing the pulverulent mass in the enclosure and for regulating the pressure inside it, which does not have the drawback mentioned above, that is to say that is to say a process whose implementation is possible, even with a modest consumption of compressed air.
  • the invention also relates to a device for ensuring the implementation of this method.
  • the method according to the present invention is essentially characterized in that, at least during a first phase corresponding to the isolation of the intermediate reservoir from the distribution enclosure, a gas is injected into it. pressure, in that this gas is recycled by filtering and compressing the gas discharged from this enclosure, and by reinjecting it therein, and in that, during a second phase, corresponding to the communication of the intermediate tank with the distribution enclosure, a forced circulation of a pressurized gas is established which is injected into the intermediate tank, which is evacuated from the pressure enclosure and which is filtered and compressed before reinjecting it into the intermediate container.
  • the same gas is used for this purpose during the two phases, by sending the gas discharged from the distribution enclosure alternately into the intermediate tank and into the distribution enclosure.
  • the distribution enclosure is periodically connected to an additional source of pressurized gas to compensate for the losses.
  • the installation for implementing this method comprises a first circuit connecting a discharge opening provided in the upper part of the enclosure to a pressure gas inlet opening provided in the lower part of this enclosure and a second circuit connecting said discharge opening to the intermediate tank, the first and the second circuit having a common branch in which at least one filter and a booster are provided, while in each of the separate branches of the first and second circuits is provided a valve to regulate the circulation of gases in each of the two circuits.
  • reference 2 represents an enclosure in which a pulverulent material, for example, coal or lignite powder, is stored for injection into an oven 10, for example a blast furnace.
  • the pulverulent material is extracted from the enclosure 2 through a series of blast chambers with a cellular rotor represented by the reference 4, while the transport and the injection are carried out pneumatically through a line 6 ali driven by a propulsion fluid sent by a compressor 8.
  • the reference 12 designates an intermediate reservoir used to fill the enclosure 2.
  • the communication between the reservoir 12 and the enclosure 2 is established through a pair of valves 14 and 16, automatically controlled by a level detection system minimum and of a maximum level, represented diagrammatically by 18, in the enclosure 2.
  • a level detection system minimum and of a maximum level represented diagrammatically by 18, in the enclosure 2.
  • the latter is isolated from the enclosure 2 by closing the valves 14 and 16 to be ventilated through a valve 20.
  • the pressure in the enclosure 2 must be greater than the pressure in the oven 10, while the pressure in the tank 12, when filling the enclosure 2 must be at least equal to the pressure in this enclosure.
  • gas preferably air
  • gas is injected into this enclosure 2 under pressure through a pipe 22.
  • the adjustment pressure inside the enclosure 2 is ensured through a self-regulating pressure valve 28 intended to connect the enclosure 2 through a filter 24 to the atmosphere.
  • This valve 28 is calibrated on a set pressure and opens automatically as soon as the pressure inside the enclosure 2 exceeds this value.
  • a recycling line 30 is provided, connected between the filter 24 and the auto valve pressure regulator 28.
  • This pipe 30 recycles the excess air towards the pipe 22, so as to establish a closed circuit.
  • the circulation in this recycling pipe 30 is controlled by means of a valve 26 mounted above the filter 24.
  • a pipe booster 32 is provided in the pipe 30.
  • An auxiliary pipe 34 furthermore connects the pipe 30, from a point located downstream of the booster 32, to the intermediate tank 12.
  • the pressurized air recycled through the pipe 30 can therefore be sent either through the pipe 2 9 in the enclosure 2 either through the pipe 34 in the tank 12, the control in one and / or the other of the two pipes 22, 34 being ensured by a pair of valves 36 and 38 provided respectively in the lines 22 and 34.
  • the recycling pipe 30 is connected through a booster pipe 40 to the compressor 8.
  • the recycling circuit is supplied by an automatic valve 42.
  • non-return valve 42, 44, 46 and 48 are each provided with a non-return valve represented by 42, 44, 46 and 48 respectively.
  • the valves 14 and 16 are open to establish communication between the reservoir 12 and the enclosure 2.
  • the recycling pipe 30 is connected through the pipe 34 to the reservoir 12, by opening the valve 38.
  • the valve is completely or only partially closed 36, that is to say that the air recycled through the pipe 30 is sent totally or partially through the pipe 34 in the tank 12 to ensure. the flow of the pulverulent material towards the enclosure 2.
  • the valves 14 and 16 are closed.
  • the valve 38 to disconnect the pipe 30 and ensure complete recycling of the pressurized air through the pipe 22 in the enclosure 2.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Air Transport Of Granular Materials (AREA)

Description

La présente invention concerne un procédé et un dispositif de régulation de pression et de fluidisation d'une masse pulvérulente dans une enceinte de distribution sous pression qui est pourvue, du côté aval d'une série d'orifices d'extraction de la matière pulvérulente et reliée, du côté amont, à un réservoir intermédiaire d'alimentation en matière pulvérulente qui est conçu comme sas pour être alternativement aéré et mis sous une pression sensiblement égale ou supérieure à la pression dans ladite enceinte et être mis en communication avec celle-ci.The present invention relates to a method and a device for regulating the pressure and fluidization of a pulverulent mass in a pressure distribution enclosure which is provided on the downstream side with a series of orifices for extracting the pulverulent material and connected, on the upstream side, to an intermediate powder supply tank which is designed as an airlock to be alternately ventilated and put under a pressure substantially equal to or greater than the pressure in said enclosure and to be placed in communication with the latter.

Quoique n'y étant pas limitée, l'invention a trait plus particulièrement à une installation du genre décrit dans le brevet LU-A-81 388, conçue pour l'injection de poudre de charbon ou de lignite dans un haut fourneau. Dans cette installation, la poudre de charbon ou de lignite est extraite par le fond de l'enceinte à travers les orifices d'extraction pourvus de sas de soufflage à rotor alvéolaire pour être acheminée ensuite par voie pneumatique à chacune des tuyères du haut fourneau et être injectée dans celui-ci.Although not limited thereto, the invention relates more particularly to an installation of the type described in patent LU-A-81,388, designed for the injection of coal or lignite powder into a blast furnace. In this installation, the coal or lignite powder is extracted by the bottom of the enclosure through the extraction orifices provided with blast chambers with a cellular rotor to be then conveyed pneumatically to each of the nozzles of the blast furnace and be injected into it.

Pour assurer une évacuation uniforme de la matière pulvérulente à travers chacun des sas de soufflage, il faut que la pression à l'intérieur de cette enceinte de distribution soit supérieure à la pression de transport pneumatique en aval de ces sas. En outre, il est absolument indispensable que la masse à l'intérieur de l'enceinte soit parfaitement fluide. Pour remplir ces deux conditions, on a proposé dans le brevet LU-A-81 388, d'injecter dans l'enceinte un gaz, notamment de l'air sous pression, pour assurer la fluidisation et la pression à l'intérieur de l'enceinte. L'air sous pression est évacué de l'enceinte à travers un clapet auto-régulateur de pression, réglé de manière à lâcher vers l'atmosphère la quantité d'air nécessaire et suffisante pour assurer la pression voulue à l'intérieur de l'enceinte.To ensure uniform evacuation of the pulverulent material through each of the blowing locks, the pressure inside this distribution enclosure must be greater than the pneumatic transport pressure downstream of these locks. In addition, it is absolutely essential that the mass inside the enclosure is perfectly fluid. To fulfill these two conditions, it has been proposed in patent LU-A-81,388 to inject a gas, in particular pressurized air, into the enclosure to ensure fluidization and pressure inside the 'pregnant. The pressurized air is evacuated from the enclosure through a self-regulating pressure valve, adjusted so as to release towards the atmosphere the quantity of air necessary and sufficient to ensure the desired pressure inside the pregnant.

Toutefois, la mise en œuvre de ce procédé de fluidisation et de régulation de pression dans l'enceinte présente l'inconvénient d'une consommation considérable d'air sous pression. A titre d'exemple, il faudrait, pour une enceinte de distribution d'un diamètre de 3,80 mètres, une quantité d'air sous pression équivalant à 21 kg par minute.However, the implementation of this fluidization process and pressure regulation in the enclosure has the drawback of considerable consumption of air under pressure. For example, for a distribution enclosure with a diameter of 3.80 meters, an amount of air under pressure equivalent to 21 kg per minute would be necessary.

Le but de la présente invention est un nouveau procédé de fluidisation de la masse pulvérulente dans l'enceinte et de régulation de pression à l'intérieur de celle-ci, qui ne présente pas l'inconvénient mentionné ci-dessus, c'est-à-dire un procédé dont la mise en oeuvre est possible, même avec une consommation modeste en air comprimé. L'invention concerne également un dispositif pour assurer la mise en oeuvre de ce procédé.The object of the present invention is a new process for fluidizing the pulverulent mass in the enclosure and for regulating the pressure inside it, which does not have the drawback mentioned above, that is to say that is to say a process whose implementation is possible, even with a modest consumption of compressed air. The invention also relates to a device for ensuring the implementation of this method.

Pour atteindre cet objectif, le procédé selon la présente invention est essentiellement caractérisé en ce que, au mois lors d'une première phase correspondant à l'isolement du réservoir intermédiaire de l'enceinte de distribution, on injecte dans celle-ci un gaz sous pression, en ce que l'on recycle ce gaz en filtrant et en comprimant le gaz évacué de cette enceinte, et en le réinjectant dans celle-ci, et en ce que, lors d'une deuxième phase, correspondant à la mise en communication du réservoir intermédiaire avec l'enceinte de distribution, on établit une circulation forcée d'un gaz sous pression que l'on injecte dans le réservoir intermédiaire, que l'on évacue de l'enceinte sous pression et que l'on filtre et comprime avant de le réinjecter dans le récipient intermédiaire.To achieve this objective, the method according to the present invention is essentially characterized in that, at least during a first phase corresponding to the isolation of the intermediate reservoir from the distribution enclosure, a gas is injected into it. pressure, in that this gas is recycled by filtering and compressing the gas discharged from this enclosure, and by reinjecting it therein, and in that, during a second phase, corresponding to the communication of the intermediate tank with the distribution enclosure, a forced circulation of a pressurized gas is established which is injected into the intermediate tank, which is evacuated from the pressure enclosure and which is filtered and compressed before reinjecting it into the intermediate container.

De préférence, on utilise, à cet effet, le même gaz lors des deux phases, en envoyant le gaz évacué de l'enceinte de distribution alternativement dans le réservoir intermédiaire et dans l'enceinte de distribution.Preferably, the same gas is used for this purpose during the two phases, by sending the gas discharged from the distribution enclosure alternately into the intermediate tank and into the distribution enclosure.

Lors de la deuxième phase, il est possible de recycler le gaz évacué de l'enceinte de distribution en partie dans celle-ci et en partie dans le réservoir intermédiaire.During the second phase, it is possible to recycle the gas discharged from the distribution enclosure partly therein and partly into the intermediate tank.

En outre, on branche périodiquement l'enceinte de distribution sur une source d'appoint de gaz sous pression pour compenser les pertes.In addition, the distribution enclosure is periodically connected to an additional source of pressurized gas to compensate for the losses.

Le recyclage du gaz envoyé sous pression dans l'enceinte de distribution permet une réduction considérable de la consommation de ce gaz, cette consommation n'étant constituée que par l'apport de gaz à travers la source d'appoint pour compenser les pertes.The recycling of the gas sent under pressure into the distribution enclosure allows a considerable reduction in the consumption of this gas, this consumption being constituted only by the supply of gas through the auxiliary source to compensate for the losses.

L'installation pour la mise en oeuvre de ce procédé comporte un premier circuit reliant une ouverture d'évacuation prévue dans la partie supérieure de l'enceinte à une ouverture d'admission d'un gaz sous pression prévu à la partie inférieure de cette enceinte et un second circuit reliant ladite ouverture d'évacuation au réservoir intermédiaire, le premier et le second circuit ayant une branche commune dans laquelle sont prévus au moins un filtre et un surpresseur, alors que dans chacune des branches séparées du premier et du second circuits est prévue une vanne pour régler la circulation des gaz dans chacun des deux circuits.The installation for implementing this method comprises a first circuit connecting a discharge opening provided in the upper part of the enclosure to a pressure gas inlet opening provided in the lower part of this enclosure and a second circuit connecting said discharge opening to the intermediate tank, the first and the second circuit having a common branch in which at least one filter and a booster are provided, while in each of the separate branches of the first and second circuits is provided a valve to regulate the circulation of gases in each of the two circuits.

D'autres particularités et caractéristiques ressortiront de la description détaillée d'un mode de réalisation présenté ci-dessous, à titre d'illustration, en référence à la figure unique qui montre schématiquement une partie d'une installation analogue à celle faisant l'objet du brevet LU-A-81 388 et sur laquelle on a greffé le dispositif de recyclage des gaz de fluidisation et de régulation de pression.Other particularities and characteristics will emerge from the detailed description of an embodiment presented below, by way of illustration, with reference to the single figure which schematically shows part of an installation similar to that which is the subject of patent LU-A-81 388 and onto which the device for recycling fluidization gases and pressure regulation has been grafted.

Sur la figure, la référence 2 représente une enceinte dans laquelle une matière pulvérulente, par exemple, de la poudre de charbon ou de lignite, est stockée en vue de l'injection dans un four 10, par exemple un haut fourneau. La matière pulvérulente est extraite de l'enceinte 2 à travers une série de sas de soufflage à rotor alvéolaire représentés par la référence 4, tandis que le transport et l'injection sont effectués par voie pneumatique à travers une conduite 6 alimentée par un fluide de propulsion envoyé par un compresseur 8.In the figure, reference 2 represents an enclosure in which a pulverulent material, for example, coal or lignite powder, is stored for injection into an oven 10, for example a blast furnace. The pulverulent material is extracted from the enclosure 2 through a series of blast chambers with a cellular rotor represented by the reference 4, while the transport and the injection are carried out pneumatically through a line 6 ali driven by a propulsion fluid sent by a compressor 8.

La référence 12 désigne un réservoir intermédiaire servant au remplissage de l'enceinte 2. La communication entre le réservoir 12 et l'enceinte 2 est établie à travers une paire de clapets 14 et 16, commandés automatiquement par un système de détection d'un niveau minimal et d'un niveau maximal, représenté schématiquement par 18, dans l'enceinte 2. Lors du remplissage du réservoir 12, celui-ci est isolé de l'enceinte 2 par la fermeture des clapets 14 et 16 pour être aéré à travers un clapet 20. Pour que le système de transport et d'injection pneumatique dans le four 10 fonctionne correctement, il faut que la pression dans l'enceinte 2 soit supérieure à la pression dans le four 10, tandis que la pression dans le réservoir 12, lors du remplissage de l'enceinte 2 doit être au moins égale à la pression dans cette enceinte.The reference 12 designates an intermediate reservoir used to fill the enclosure 2. The communication between the reservoir 12 and the enclosure 2 is established through a pair of valves 14 and 16, automatically controlled by a level detection system minimum and of a maximum level, represented diagrammatically by 18, in the enclosure 2. When filling the reservoir 12, the latter is isolated from the enclosure 2 by closing the valves 14 and 16 to be ventilated through a valve 20. For the pneumatic transport and injection system in the oven 10 to function properly, the pressure in the enclosure 2 must be greater than the pressure in the oven 10, while the pressure in the tank 12, when filling the enclosure 2 must be at least equal to the pressure in this enclosure.

Afin de maintenir une pression suffisante dans l'enceinte 2 et afin d'assurer une fluidisation optimale de la masse pulvérulente, on injecte dans cette enceinte 2 un gaz, dé préférence de l'air, sous pression à travers une conduite 22. Le réglage de la pression à l'intérieur de l'enceinte 2 est assuré à travers un clapet auto-régulateur de pression 28 destiné à relier l'enceinte 2 à travers un filtre 24 à l'atmosphère. Ce clapet 28 est étalonné sur une pression de consigne et s'ouvre automatiquement dès que la pression à l'intérieur de l'enceinte 2 dépasse cette valeur.In order to maintain sufficient pressure in enclosure 2 and in order to ensure optimal fluidization of the pulverulent mass, gas, preferably air, is injected into this enclosure 2 under pressure through a pipe 22. The adjustment pressure inside the enclosure 2 is ensured through a self-regulating pressure valve 28 intended to connect the enclosure 2 through a filter 24 to the atmosphere. This valve 28 is calibrated on a set pressure and opens automatically as soon as the pressure inside the enclosure 2 exceeds this value.

Pour éviter une consommation excessive d'air sous pression en lâchant vers l'atmosphère à travers le clapet 28 l'air injecté sous pression à travers la conduite 22, on prévoit une conduite de recyclage 30, branchée entre le filtre 24 et le clapet auto-régulateur de pression 28. Cette conduite 30 recycle l'excès d'air vers la conduite 22, de manière à établir un circuit fermé. La circulation dans cette conduite de recyclage 30 est contrôlée au moyen d'un clapet 26 monté au-dessus du filtre 24. Pour compenser les pertes de charge dues à ce recyclage, on prévoit dans la conduite 30 un surpresseur32.To avoid excessive consumption of air under pressure by releasing towards the atmosphere through the valve 28 the air injected under pressure through the line 22, a recycling line 30 is provided, connected between the filter 24 and the auto valve pressure regulator 28. This pipe 30 recycles the excess air towards the pipe 22, so as to establish a closed circuit. The circulation in this recycling pipe 30 is controlled by means of a valve 26 mounted above the filter 24. To compensate for the pressure losses due to this recycling, a pipe booster 32 is provided in the pipe 30.

Une conduite auxiliaire 34 relie, en outre, la conduite 30, à partir d'un point situé en aval du surpresseur32, au réservoir intermédiaire 12. L'air sous pression recyclé à travers la conduite 30 peut donc être envoyé soit à travers la conduite 29 dans l'enceinte 2 soit à travers la conduite 34 dans le réservoir 12, le contrôle dans l'une et/ou l'autre des deux conduites 22, 34 étant assuré par une paire de clapets 36 et 38 prévus respectivement dans les conduites 22 et 34.An auxiliary pipe 34 furthermore connects the pipe 30, from a point located downstream of the booster 32, to the intermediate tank 12. The pressurized air recycled through the pipe 30 can therefore be sent either through the pipe 2 9 in the enclosure 2 either through the pipe 34 in the tank 12, the control in one and / or the other of the two pipes 22, 34 being ensured by a pair of valves 36 and 38 provided respectively in the lines 22 and 34.

Pour compenser les pertes d'air, la conduite de recyclage 30 est reliée à travers une conduite d'appoint 40 au compresseur 8. L'approvisionnement du circuit de recyclage est assuré par un clapet automatique 42.To compensate for the air losses, the recycling pipe 30 is connected through a booster pipe 40 to the compressor 8. The recycling circuit is supplied by an automatic valve 42.

Pour assurer une circulation correcte dans les différents circuits, ceux-ci sont pourvus chacun d'un clapet anti-retour représentés respectivement par 42, 44, 46 et 48.To ensure correct circulation in the different circuits, these are each provided with a non-return valve represented by 42, 44, 46 and 48 respectively.

On va décrire maintenant brièvement le fonctionnement du système illustré sur la figure. On va d'abord supposer que l'enceinte 2 est en cours de vidange et qu'elle est isolée du réservoir 12 par la fermeture des clapets 14 et 16, ce réservoir 12 étant en phase de remplissage. Dans ce cas l'air sous pression circule en circuit fermé à travers la conduite22, l'enceinte 2, le filtre 24 et la conduite de recyclage 30, grâce à l'opération du surpresseur 32. Pour compenser la diminution de volume à l'intérieur de l'enceinte 2 résultant de l'extraction de la masse pulvérulente on injecte une certaine quantité d'air sous pression à travers la conduite d'appoint 40 et la vanne 42. Si la pression dans l'enceinte 2 et dans le circuit de recyclage dépasse la valeur de consigne sur laquelle est étalonné le clapet auto-régulateur 28, celui-ci est ouvert automatiquement pour rétablir la pression maximale.We will now briefly describe the operation of the system illustrated in the figure. We will first assume that the enclosure 2 is being emptied and that it is isolated from the reservoir 12 by closing the valves 14 and 16, this reservoir 12 being in the filling phase. In this case, the pressurized air circulates in a closed circuit through the pipe 22, the enclosure 2, the filter 24 and the recycling pipe 30, thanks to the operation of the booster 32. To compensate for the reduction in volume at the inside the enclosure 2 resulting from the extraction of the pulverulent mass, a certain amount of pressurized air is injected through the make-up line 40 and the valve 42. If the pressure in the enclosure 2 and in the circuit recycling exceeds the set value on which the self-regulating valve 28 is calibrated, it is opened automatically to restore the maximum pressure.

Lorsque le niveau de la masse pulvérulente dans l'enceinte 2 atteint le niveau minimal, les clapets 14 et 16 sont ouverts pour établir la communication entre le réservoir 12 et l'enceinte 2. Pour assurer le transfert du contenu du réservoir 12 dans l'enceinte 2, on branche, lors de cette phase de remplissage de l'enceinte 2, la conduite de recyclage 30 à travers la conduite 34 au réservoir 12, en ouvrant le clapet 38. Simultanément on ferme complètement, ou seulement en partie, le clapet 36, c'est-à-dire que l'air recyclé à travers la conduite 30 est envoyé totalement ou partiellement à travers la conduite 34 dans le réservoir 12 pour assurer. l'écoulement de la matière pulvérulente vers l'enceinte 2. Dès que le niveau maximal est atteint dans l'enceinte 2, ou que le réservoir intermédiaire 12 est vide, on ferme les clapets 14 et 16. En même temps, on ferme le clapet 38 pour déconnecter la conduite 30 et assurer le recyclage complet de l'air sous pression à travers la conduite 22 dans l'enceinte 2.When the level of the pulverulent mass in the enclosure 2 reaches the minimum level, the valves 14 and 16 are open to establish communication between the reservoir 12 and the enclosure 2. To ensure the transfer of the contents of the reservoir 12 into the enclosure 2, during this filling phase of enclosure 2, the recycling pipe 30 is connected through the pipe 34 to the reservoir 12, by opening the valve 38. At the same time, the valve is completely or only partially closed 36, that is to say that the air recycled through the pipe 30 is sent totally or partially through the pipe 34 in the tank 12 to ensure. the flow of the pulverulent material towards the enclosure 2. As soon as the maximum level is reached in the enclosure 2, or that the intermediate reservoir 12 is empty, the valves 14 and 16 are closed. At the same time, the valve 38 to disconnect the pipe 30 and ensure complete recycling of the pressurized air through the pipe 22 in the enclosure 2.

Claims (9)

1. Process for the regulation of the pressure and fluidization of a pulverulent mass in an enclosure under pressure which is provided on the downstream side with a series of extraction orifices for the pulverulent material and connected on the upstream side with an intermediate feed tank for the supply of the pulverulent material, the tank being designed as a chamber to be alternately aerated and subject to a pressure approximately equal to or above the pressure prevailing in the said enclosure and to be put in communication with this latter, characterized in that at least during a first phase, corresponding to the isolation of the intermediate tank from the distribution enclosure, a gas under pressure is injected into the said enclosure, this gas being recycled by filtering and compressing the gas evacuated from the enclosure and by reinjecting it into the latter, and wherein during a second phase, corresponding to the communication between the intermediate tank with the distribution enclosure, forced circulation is effected of a gas under pressure, which is injected into the intermediate tank, evacuated from the enclosure under pressure and filtered and compressed before being re-injected into the intermediate tank.
2. Process in accordance with claim 1, characterized in that the same gas is used in each phase, the gas evacuated from the enclosure being conveyed into the intermediate tank and into the distribution enclosure in alteration.
3. Process in accordance with either of claims 1 or 2, characterized in that the gas evacuated from the enclosure is recycled partly into the latter and partly into the intermediate tank during the second phase.
4. Process in accordance with any one of claims 1 to 3, characterized in that the distribution enclosure is connected periodically to a supplementary pressure gas source in order to compensate the losses.
5. Process in accordance with any one of claims 1 to 4, characterized in that the pressure gas consists of air.
6. Installation for the performance of the process described in any one of claims 1 to 5, characterized by a first circuit connecting an evacuation aperture provided in the upper part of the enclosure (2) to a pressure gas admission aperture provided in the lower part of the said enclosure (2) and also a second circuit (34) connecting the said evacuation aperture to the intermediate tank (12), the first and the second circuit having one common branch (30) in which are provided at least a filter (24) and a pressure increasing device (32), while each of the separate branches of the first and second circuits contains a valve (36, 38) for regulating the circulation of the gases in each of the circuits.
7. Installation in accordance with claim 6, characterized in that the common branch (30) is connected, upstream from the pressure increasing device (32), to a supplementary supply pipe (40).
8. Installation in accordance with either of claims 6 or 7, characterized in that the common branch (30), the first circuit (22), the second circuit (34) and the supplementary supply pipe (40) are provided with check valves (42, 44, 46, 48):
9. Installation in accordance with any one of claims 6 to 8, characterized by an automatic pressure regulating valve (28) connecting the enclosure (2) and the common branch (30) to the atmosphere.
EP19810101434 1980-04-04 1981-02-27 Process and installation for regulating pressure and fluidisation of a pulverized mass in a distribution container Expired EP0037460B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81101434T ATE4914T1 (en) 1980-04-04 1981-02-27 METHOD AND DEVICE FOR CONTROLLING THE PRESSURE AND FLUIDIZING A POWDER MASS IN A DISTRIBUTION VESSEL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU82336A LU82336A1 (en) 1980-04-04 1980-04-04 METHOD AND DEVICE FOR PRESSING AND FLUIDIZING A PULVERULENT MASS IN A DISTRIBUTION ENCLOSURE
LU82336 1980-04-04

Publications (2)

Publication Number Publication Date
EP0037460A1 EP0037460A1 (en) 1981-10-14
EP0037460B1 true EP0037460B1 (en) 1983-10-05

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EP19810101434 Expired EP0037460B1 (en) 1980-04-04 1981-02-27 Process and installation for regulating pressure and fluidisation of a pulverized mass in a distribution container

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US (1) US4395166A (en)
EP (1) EP0037460B1 (en)
JP (1) JPS56149918A (en)
AR (1) AR223420A1 (en)
AT (1) ATE4914T1 (en)
AU (1) AU6909481A (en)
BR (1) BR8102072A (en)
DE (1) DE3161075D1 (en)
ES (1) ES500661A0 (en)
LU (1) LU82336A1 (en)
PL (1) PL230322A1 (en)
ZA (1) ZA811899B (en)

Families Citing this family (12)

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FR2501833B1 (en) * 1981-03-10 1985-05-31 Stein Industrie DEVICE FOR INTRODUCING AND COMBUSTING A SOLID FUEL SPRAYED INTO A PRESSURE ENCLOSURE
LU84390A1 (en) * 1982-09-27 1984-04-24 Arbed METHOD AND DEVICE FOR HEATING A STEEL BATH FILLED WITH SCRAP
LU84444A1 (en) * 1982-10-27 1984-05-10 Arbed SYSTEM FOR ADJUSTING THE SOLID MATERIAL SUPPLY OF A BLOWER LANCE
DE3245567C2 (en) * 1982-12-09 1985-04-18 Metallgesellschaft Ag, 6000 Frankfurt Process for gasifying carbonaceous agglomerates in a fixed bed
JPS59115981A (en) * 1982-12-22 1984-07-04 川崎製鉄株式会社 Method and device for blowing in powdered and granular body into smelting furnace, etc.
DE3578860D1 (en) * 1984-10-23 1990-08-30 Toshiba Kawasaki Kk TYPE TRANSPORT SYSTEM WITH FLOATING CARRIER.
IT1263909B (en) * 1993-02-12 1996-09-05 Balzaretti Modigliani Spa INTRODUCTION OF POWDER ADDITIVES INTO PIPES THAT FEED AN OVEN WITH FUEL
US7488141B2 (en) * 2004-07-14 2009-02-10 Halliburton Energy Services, Inc. Automated control methods for dry bulk material transfer
DE202011051916U1 (en) * 2011-11-10 2012-11-15 Viessmann Werke Gmbh & Co Kg storage device
CN102626685A (en) * 2012-04-28 2012-08-08 广州卓迅包装机械有限公司 Pressurized-jet powder supply system
LU92037B1 (en) * 2012-07-06 2014-01-07 Wurth Paul Sa Device for depressurizing a pressurized reservoir for storing granular or pulverulent material, and installation for distributing pulverulent material by pneumatic transport comprising such a device
FI124217B (en) * 2012-08-27 2014-05-15 Outotec Oyj ARRANGEMENTS FOR SUPPLYING A GRINDING SUBSTANCE TO A SUSPENSION FROZEN OVEN OR A STONE BURNER

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US3150962A (en) * 1962-04-05 1964-09-29 Babcock & Wilcox Co Pulverized coal firing method and system for blast furnace
LU81388A1 (en) * 1979-06-15 1979-09-12 Wurth Paul Sa METHOD AND INSTALLATION FOR DOSING AND PNEUMATIC TRANSPORT OF SOLID MATERIALS TO A PRESSURE VESSEL
LU81581A1 (en) * 1979-08-07 1979-12-07 Wurth Anciens Ets Paul METHOD AND INSTALLATION FOR DOSING AND PNEUMATIC TRANSPORT OF SOLID MATERIALS TO A PRESSURE VESSEL

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US3762773A (en) * 1972-06-30 1973-10-02 W Schroeder Method and apparatus for feeding finely divided solids to a pressurized gas or gasliquid solids system
US4067623A (en) * 1974-04-02 1978-01-10 Polysius Ag Pneumatic pressure conveyor for fine material
DE2538785C3 (en) * 1975-09-01 1978-09-14 2000 Hamburg Device for saving compressed gas when injecting solids with the aid of pressure vessel conveyors

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US3150962A (en) * 1962-04-05 1964-09-29 Babcock & Wilcox Co Pulverized coal firing method and system for blast furnace
LU81388A1 (en) * 1979-06-15 1979-09-12 Wurth Paul Sa METHOD AND INSTALLATION FOR DOSING AND PNEUMATIC TRANSPORT OF SOLID MATERIALS TO A PRESSURE VESSEL
LU81581A1 (en) * 1979-08-07 1979-12-07 Wurth Anciens Ets Paul METHOD AND INSTALLATION FOR DOSING AND PNEUMATIC TRANSPORT OF SOLID MATERIALS TO A PRESSURE VESSEL

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DE3161075D1 (en) 1983-11-10
JPS56149918A (en) 1981-11-20
ATE4914T1 (en) 1983-10-15
PL230322A1 (en) 1981-11-13
AR223420A1 (en) 1981-08-14
ZA811899B (en) 1982-04-28
ES8206631A1 (en) 1982-09-01
BR8102072A (en) 1981-10-06
ES500661A0 (en) 1982-09-01
EP0037460A1 (en) 1981-10-14
AU6909481A (en) 1981-10-08
US4395166A (en) 1983-07-26
LU82336A1 (en) 1980-07-02

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