EP0500561B1 - Procede et dispositif pour l'agitation e le traitement thermique de particules solides - Google Patents

Procede et dispositif pour l'agitation e le traitement thermique de particules solides Download PDF

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Publication number
EP0500561B1
EP0500561B1 EP90915295A EP90915295A EP0500561B1 EP 0500561 B1 EP0500561 B1 EP 0500561B1 EP 90915295 A EP90915295 A EP 90915295A EP 90915295 A EP90915295 A EP 90915295A EP 0500561 B1 EP0500561 B1 EP 0500561B1
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EP
European Patent Office
Prior art keywords
tank
bulk material
jacket
product
solid particles
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
EP90915295A
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German (de)
English (en)
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EP0500561A1 (fr
Inventor
Roland LÜCKE
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Gebrueder Loedige Maschinenbau GmbH
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Gebrueder Loedige Maschinenbau GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/625—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis the receptacle being divided into compartments, e.g. with porous divisions

Definitions

  • the invention relates to a device for mixing and thermal treatment of solid particles with a substantially horizontally arranged container, which is penetrated along its longitudinal axis with a shaft provided by a drive motor, with a loading and emptying opening arranged on the container, the container being transverse to the longitudinal axis is divided between the loading opening and the emptying opening by means of cutting disks with at least one through opening into at least three interconnected chambers and with in each chamber at least one tool arranged radially on the shaft, the tool being suitable for imparting a tangentially and / or axially directed movement impulse to the Pass on solid particles, and a method for mixing and thermal treatment of solid particles.
  • Devices for mixing solid particles with rotating tools which have a horizontally arranged cylindrical container with a shaft coaxially guided in the container with mixing tools, are known as batch mixers and continuously operated mixers.
  • batch operation the machine used as a mixer, dryer, reactor or cooler is charged with the bulk goods or additives to be treated. Is the loading process completed, there follows a treatment process in which the bulk goods are mixed with one another, cooled, dried, heated, crushed or agglomerated. During this treatment, reactions can also take place that give rise to new products or release gases that are drawn off via suitable breeding stubs. When the treatment of the product is complete, it is discharged from the machine in an emptying process.
  • Fr mx ⁇ 2 xr mxg
  • m the mass of the particles
  • r the radius of the drum
  • the mean residence time of the bulk goods in the solid mixer can be controlled via the bulk material mass stored in the product interior and the bulk material flow.
  • the product interior of this solid mixer extends from the frontal boundary surface to a weir, which is provided in the cylindrical drum and is installed directly in front of the product discharge nozzle.
  • the mixer known from DE-A-11 12 968 has, as shown in FIG. 2 of the drawing, a jacket which is not explained in more detail in the description.
  • a jacket which is not explained in more detail in the description.
  • an uncontrolled product flow is possible through the openings of the cutting discs located on the bottom.
  • the invention is therefore based on the object of developing and operating a solid mixer of the type mentioned at the outset such that the thermal treatment of the bulk material flow can be better controlled over the entire length of the solid mixer.
  • the solid mixer according to the invention thus has the essential advantage that it can be thermally cooled or heated in cross flow.
  • the known heating and cooling mixers in a horizontal arrangement can only be operated in cocurrent and / or countercurrent because the structurally known jacket structure allows fluid flow only along the product stream.
  • a central supply and discharge line connected to the casing the fluid cooling or heating the product can be guided across the circumference of the product flow around the container. Thermally, this has the advantages that a maximum temperature difference can be achieved at a constant fluid inlet temperature both at the product inlet and at the product outlet.
  • the solids mixer according to the invention has the advantage that it divides the product interior, the space seen in the axial direction from the face on the entry side to a cutting disc in front of a product discharge nozzle, into at least two processing zones, in which the bulk material flow, almost independently of the other processing zone, can be treated.
  • the product interior can be divided into several processing zones as required, each of which is separated from the other by cutting discs. Now the centrifugal speed is increased to the extent that the tools in the product interior generate mechanically generated fluidized bed, swarms of particles can enter the respective adjacent processing zones through the through openings. In this way, the processing zone immediately below the loading opening can be emptied so that it can be filled with a new batch. The processing zone below the loading opening can also be loaded with new product if the bulk material from the previous batch is still being treated in the adjacent processing zone.
  • the solid mixer according to the invention can be operated particularly advantageously quasi-continuously due to the special design of its product interior.
  • a quasi-continuous mode of operation is to be understood here to mean that the bulk material or batches flow into the product interior in batches and leave the product interior as a continuous product stream.
  • the definition also includes the reverse mode of operation, that the solid mixer according to the invention is fed continuously and the treated bulk material is discharged from the solid mixer in batches.
  • the solid mixer according to the invention is operated as a batch mixer or batch cooler in the range of Fr ⁇ 1, it is always ensured that a particle exchange along the shaft, i. H. cross-mixing is only possible within the processing zones delimited by cutting discs. This enables products of different treatment levels to be effectively separated from one another even in batch operation.
  • the solid mixer according to the invention is not only a multi-chamber operation in batch mixers or continuously or quasi-continuously operated mixers in a horizontally arranged drum, but an operating mode that largely separates the treatment of the bulk material from its axial transport towards the outlet.
  • the bulk material is treated in the pile and transported in the mechanically generated fluidized bed or in the bulk material ring. Linking two operating modes in one machine is therefore an essential idea of the invention.
  • the rotating tools transport the bulk material away from the loading opening in the direction of the discharge opening. Due to centrifugal machine speeds, which create a mechanical fluidized bed or a product ring of the bulk material in the product interior, the transport component is reinforced in the direction of the product discharge.
  • the bulk material from the processing zones can thus be quickly emptied towards the product discharge. If a product stream is to be cooled, this can be achieved by effective mixing in the material bed of the respective processing zone and the axial transport into the adjacent processing zone for product discharge takes place in that the bulk material is fluidized, ie. H.
  • a mechanical fluidized bed or a product ring is temporarily generated in the product interior.
  • the solid mixer With the container encased according to the invention, it is possible to operate the solid mixer as a cooling mixer or to use it as a solid mixer for heat treatment of bulk materials with an elevated temperature medium. Cooled and / or heated water, steam or thermal oil can flow through the casing as a carrier medium. Cryogenic fluids can also be used.
  • the container designed according to the invention has elements for supplying and / or removing heat on or in the container wall which surround the container in the circumferential direction to more than 180 °, but less than 360 °. This ensures that the entire bulk material mass stored in the product interior rests against inner wall sections of the container which are actively cooled or heated.
  • the peripheral section free of the elements lies in the upper region of the container.
  • Another advantage of the method according to the invention for mixing and thermal treatment of solid particles in multi-chamber operation is that the method works quasi-continuously.
  • the product interior stores such a large bulk material mass that bulk material introduced batchwise into the product interior does not affect the continuous outflow of the bulk material.
  • the processing zones are separated from each other by cutting discs, so that it is possible to load the first processing zone, which is located directly below the loading opening of a solid mixer according to the invention, in batches and the treated bulk material is continuously withdrawn from the last processing zone of the product interior via the product discharge nozzle. If the product treatment takes place in the pile and the product flow for discharge in the mechanically generated fluidized bed or in the product ring, the bulk material can be remixed within of the product interior and its transport to the product discharge nozzle are controlled as best as possible.
  • the sections of the casing allow heat to be supplied and / or removed independently of one another.
  • the sheathing consists of half-tubes welded onto the outer wall of the container, which are connected to a central feed line and discharge line, the flow guidance for liquid carrier media is specified.
  • the flow resistances in the casing are defined. If the half-tubes are individual half-tubes which are welded to the container jacket in a largely semicircular shape, the rigidity of the container is improved and the container can be produced with a reduced container wall thickness.
  • the solid mixer according to the invention can be cleaned well and quickly if required. An exchange of tools or work on cutter head systems are made easier.
  • the opening flap itself is not covered with half tubes. This enables simple and inexpensive manufacture of the opening flap.
  • the dead weight is lower, so that the opening flap can also be easily pivoted in manual mode.
  • the cutting discs can be cooled and / or heated.
  • the drive motor is a pole-changing motor or a motor that is infinitely variable in speed.
  • the energy introduced into the bulk material via the rotating tools is low, so that the bulk material is only slightly heated during a cooling process.
  • the bulk material to be treated is mixed very gently. If the bulk material is to be transported from one processing zone to another processing zone, the speed of the centrifugal unit is increased briefly. In the fluidized state, the bulk material can overcome the cutting discs through the through openings.
  • the tools are designed and placed on the shaft in such a way that they support a transport of the bulk material in the fluidized state in the direction of the product discharge.
  • the solid mixer according to the invention thus meets all of the extended requirements that are placed in particular on devices for cooling bulk materials. It can be operated in batches, continuously or quasi-continuously. Along the solid mixer, container sections can be operated independently of one another with media of different temperatures. Large specific cooling capacities can be achieved through the special mode of operation of the solids mixer, cooling in the pile, transport of the bulk material in the fluidized state.
  • the cooling process is supported by a cooled shaft, cooled tools and cooled cutting discs.
  • the through openings are arranged in the product interior in such a way that short-circuit flows of the bulk material are prevented and an axial dispersion takes place essentially only in the respective processing zone.
  • the solids mixer 10 is composed of a container 11, a horizontally arranged cylindrical drum, and head pieces 12, 13 which are attached to the front sides of the container 11.
  • the head pieces 12, 13 can be welded or screwed to the end faces of the container 11.
  • the head pieces 12, 13 have an opening which is arranged circularly and coaxially to the longitudinal axis of the container 11.
  • a shaft 14 is guided through the opening in the head piece 12, 13 and is rotatably held in bearings 15, 16 connected to the head pieces 12, 13.
  • the free end of the shaft 14, a shaft journal 17, projects beyond the bearing 16.
  • the shaft journal 17 can be connected to a motor via a suitable gear.
  • the unit comprising the motor and gearbox serves as the drive unit for the shaft 14.
  • Mixing elements are arranged on the shaft 14 in the container interior, which can perform a rotary movement together with the shaft.
  • the solids mixer 10 can be fastened to the foundations or frame structures by means of supports 21, 22.
  • a loading opening 23 is arranged on the container 11, which is designed as a loading nozzle 24 with a flange. Bulk material to be processed can flow into the container 11 in the direction of arrow 25 via the feed nozzle 24.
  • the loading opening 23 can be connected to pipe and loading systems via the flange on the loading nozzle 24.
  • an emptying opening 26 is provided, which is designed as an emptying nozzle 27 with a suitable flange. Bulk material treated in the solid mixer 10 can be discharged via the emptying nozzle 27 in the direction of arrow 28.
  • a ventilation port 31 is provided as a further opening on the container 11, via which a pressure equalization in the interior of the container can be achieved or via which vapors or gas flows can be drawn off.
  • a further nozzle 32 is attached, which is closed with a blind flange 33.
  • the bulk material in the container can be emptied or the bulk material flow can be controlled starting from the loading in the direction of arrow 25 so that the bulk material immediately after it has flowed into the container 11, the container 11 leaves the nozzle 32 .
  • further nozzles can be attached to the solids mixer 10 through which individual processing zones can be emptied directly.
  • an opening flap 35 is provided along the top of the solid mixer 10.
  • the opening flap 35 can be manually operated and / or also opened or closed automatically with the aid of aids.
  • Sight glasses 36, 37, 38 are fastened in the opening flap 35, via which the bulk material flow in the container 11 can be visually checked.
  • Half pipes 40 are welded onto the outer wall of the container and are connected to a supply line 41, 42, 43 in such a way that the supply line 41, 42, 43 can supply the half pipes 40 connected to it with a cooling / heating medium.
  • the connection to a corresponding cooling / heating medium supply device takes place via a flange connection 41 ', 42', 43 '.
  • the feed lines 41, 42, 43 are separated from one another, so that the half pipes 40 connected to the respective feed line 41, 42, 43 can be operated separately with media of different temperatures.
  • the half-pipes 40 end on the rear side of the solid-state mixer 10, which cannot be seen in the figure, by opening into a discharge line, which is designed to be comparable to the feed line 41, 42, 43.
  • the half-tubes 40 surround the container 11 in the circumferential direction to more than 180 °, but less than 360 °.
  • Half-tubes 40 are also to be understood as half-tubes which are arranged in a circular arc on the container jacket and do not continuously guide the medium flowing through in a helical manner.
  • the half-tubes 40 are drawn further up than on the front. This constructive design of the half-tubes 40 on the container 11 makes it possible that even a bulk material raised in the direction of rotation lies completely against the cooled surfaces of the container 11.
  • the container 11 has support rings 45, 46 on the outer wall of the container, which are also formed on the opening flap 35.
  • the support rings 45, 46 stiffen the container 11, so that there is a constant rounding of the drum with a very narrow tolerance range over the length of the container 11.
  • Half-tubes 40 attached in a circular arc improve the inherent rigidity of the container 11.
  • temperature sensors 48, 49, 50 are guided through the container wall into the product interior.
  • the temperature of the bulk material in the respective container section can be determined via the temperature sensors 48, 49, 50.
  • fast rotating cutter head systems 51, 52 can be attached to the solid mixer 10, which in addition to the mixing of the solid particles by the tools on the shaft 14 can separate agglomerates or influence the grain size distribution of the bulk material to be processed.
  • the head piece 12 hides the horizontally lying drum, which is shown in the figure with broken lines.
  • the Shaft journal 17 protrudes from the bearing 16, in which the shaft is rotatably mounted.
  • the opening flap 35 is swung open and the charging nozzle 24 and the ventilation nozzle 31 are visible.
  • the half pipes 40 with the feed line 41 and a discharge line 54 are shown on the outer wall of the container. About the nozzle 41 ', 54', the half pipes 40 can be connected to a coolant / heating medium supply device, not shown, or a drainage system.
  • the feed and discharge lines 41, 54 can also be formed jointly on one long side of the solid mixer 10.
  • the fluid guided in the feed and discharge line 41, 54 then crosses twice the product stream, in which it first flows around the container 11 transversely to the longitudinal axis and then again flows transversely to the longitudinal axis transversely of the container 11. Laterally in the lower area, the cutter head system 51, which has its own drive, is guided obliquely upward through the container wall.
  • FIG. 2 shows a cutting disc 56 with a through opening 57.
  • a bulk material entering the container interior through the feed nozzle 24 can only be conveyed through the passage opening 57 along the shaft.
  • the product cooling or heating fluid is fed to the solid mixer 10 over the entire length via the nozzle 41 'and the feed line 41 and the fluid passed through the half pipes 40 across the product stream is withdrawn via the discharge line 54 and the nozzle 54'.
  • Fig. 3 shows a solid mixer 60 highly schematic in longitudinal section.
  • a cylindrical, horizontally lying drum 61 receives a shaft 62 which is mounted in bearings 63, 64 on head pieces 65, 66 and is rotatably mounted.
  • Bulk material can enter the product interior in the direction of the arrow 68 via a feed nozzle 67 flow in.
  • the treated bulk material can flow out of the product interior in the direction of arrow 70 via an emptying nozzle 69.
  • Solid blades 71 and half blades 72 are shown symbolically in the figure as tools which are connected in a rotationally fixed manner to the shaft 62.
  • the product interior is divided into a first processing zone 73, a second processing zone 74 and a third processing zone 75.
  • the first processing zone 73 is axially delimited by the head piece 66 and a cutting disk 76.
  • the cutting disc 76 has a through opening 77 through which the bulk material flowing in in the direction of arrow 68 can be conveyed from the first processing zone 73 into the second processing zone 74.
  • the bulk material in the interior of the product is conveyed, on the one hand, by the bulk material flow itself and, on the other hand, by a movement component directed in the bulk material in the axial direction towards the emptying nozzle 69, which is generated by the rotating full blades 71 and half blades 72.
  • the second processing zone 74 is delimited to the feed nozzle 67 by the cutting disc 76 and to the emptying nozzle 69 by a cutting disc 78.
  • the cutting disc 78 has a through opening 79 which connects the second processing zone 74 to the third processing zone 75.
  • the third processing zone 75 is delimited by the cutting wheel 78 and a cutting wheel 80.
  • a through opening 81 of the cutting disc 80 connects the third processing zone 75 to the space which has the drainage spout 69.
  • the space with the emptying nozzle 69 can be used as a further additional processing zone, if necessary, by suitable operation of closure elements on the emptying nozzle 69.
  • the bulk material can flow out of the product interior via the discharge nozzle 69 in the direction of arrow 70.
  • the shaft 62, together with the full blades 71 and the half blades 72 forms the centrifugal mechanism, rotated in the direction of arrow 82, the solid particles in the bulk material are mixed intensively with one another by the full blades 71 and the half blades 72 and at the same time due to the setting of the full blades 71 and the half blades 72 on the shaft 62 from the first processing zone 73 into the second processing zone 74 and also promoted into the third processing zone 75.
  • the cutting disks 76, 78, 80 further have the effect that a short circuit can be prevented in a continuous or quasi-continuous mode of operation of the solids mixer 60.
  • a short circuit is to be understood here as meaning that solid particles which enter the product interior through the feed nozzle 67 immediately afterwards exit the product interior via the emptying nozzle 69, without having the respective mean residence time in the first, second, third processing zones 73, 74.75 have lingered.
  • the cutting discs 76, 78, 80 can have through openings 77, 79, 81 of different sizes. The size and position of the through openings 77, 79, 81 depends on the product; they must be matched to the respective bulk material parameters, such as bulk density, material density, grain size range, flow function. According to the position, the through openings 77, 79, 81 can be arranged both in the upper and in the lower drum area.
  • the through openings 77, 79, 81 are usually offset in such a way that a direct product flow from the feed nozzle 67 to the discharge nozzle 69 can be ruled out.
  • Fig. 4a shows the container 11 of Fig. 1 in section IVa to IVa.
  • the illustration of the opening flap has been omitted in the figure.
  • Tools 86 are arranged in a rotationally fixed manner on a hollow shaft 85.
  • the tools 86 are designed as ploughshare-like mixing tools. They have a leading tip 87 and from this outgoing, as work surfaces side cheeks 88, at least one of which is inclined to the direction 89 of the mixing tool in such a way that it encloses an obtuse angle with a plane transverse to the longitudinal axis which is laid through the longitudinal axis of the mixing tool.
  • the obtuse angle at which the cheeks 88 of the mixing tools are inclined corresponds approximately to the inner fracture lines of the bulk material when a flat surface passes through the bulk material.
  • a cooling or heating medium flows through the tools 86 as well as the hollow shaft 85.
  • a first processing zone 90 is delimited towards the bulk material discharge by a cutting disk 91.
  • the cutting disc 91 is provided with a through opening 92 which connects the first processing zone 90 to a second processing zone 93 located behind the cutting disc 91.
  • the cooling or heating medium flows through half pipes 94.
  • the cooling or heating medium enters the casing via a connector 95 and leaves the jacket system through a connector 96.
  • the cooling or heating medium is uniformly distributed over the individual half pipes 94 via a feed line 97.
  • the cooling or heating medium which has flowed through the individual half-tubes 94, is combined in a discharge line 98 and discharged centrally via the nozzle 96.
  • FIG. 4b shows the section IVb to IVb from FIG. 1.
  • a cutting disk 99 separates the second processing zone 93 from a third processing zone 100.
  • the rotating tools 86 convey the bulk material from the second processing zone 93 through a through opening 101 into the third processing zone 100
  • Half-pipes 102 which are fed via a connector 103 and a feed line 104, can be supplied with a cooling or heating medium operated at a different temperature than the half-tubes 94, which are shown in Fig. 4a.
  • the cooling or heating medium leaves the casing via a central discharge line 105 and a connector 106.
  • the opening flap is not shown in the section of FIG. 4b.
  • FIG. 4c shows a section IVc to IVc of FIG. 1.
  • a cutting disc 108 delimits the third processing zone 100 towards the product outlet.
  • the processed bulk material flows through a through opening 109 in the cutting disc 108 into the room with an emptying nozzle.
  • the tools 86 rotating in the third processing zone 100 convey the bulk material in the direction of the cutting disc 108 and lift it through the through opening 109.
  • Half pipes 111 which form the casing of the drum section of the third processing zone 100, can in turn be operated at a temperature of the cooling or heating medium that differs from the temperatures at which the first processing stage 90 and the second processing stage 93 are operated.
  • the cutting discs 91, 99, 108 can also be cooled or heated.
  • the bulk material conveyed from the product inlet to the product outlet is dammed up at the respective cutting discs 91, 99, 108. They produce a force that counteracts the axial direction of conveyance of the bulk material.
  • FIG. 5a, 5b and 5c show the bulk material movement in the device according to the invention in a highly schematic manner.
  • Froude number which is a measure of the ratio of centrifugal and gravitational acceleration
  • the movement behavior of the bulk material inside the product changes.
  • the centrifuge rotates slowly at first, the product turns in the direction of rotation raised. This is shown in Fig. 5a.
  • Tools 112 rotate in the direction of arrow 113 and move the individual solid particles in the pile. This creates an angle of the free product surface which corresponds approximately to the angle of repose of the bulk material to be processed.
  • little energy is introduced into the bulk material via the tools. There is an intensive exchange of the solid particles towards the heated or cooled wall.
  • solid particles are increasingly thrown out of the bulk material bed into the free mixing space when the tools 112 rotate in the direction of the arrow 113 with an increased number of Froudes.
  • the bed is fluidized more and more. It is a matter of mixing solids in a mechanically generated fluidized bed. Due to the higher spin speed, more friction energy is generated and the bulk material is heated due to the intensive movement. In a cooling process with the device according to the invention, the rising bulk material temperature which arises due to the rapidly rotating tools 112 can be counteracted directly by cooled tools and cooled cutting disks.
  • the centrifugal machine rotates at a centrifugal machine speed which causes a more or less closed product ring to be present in the interior of the product.
  • the consistency of the product ring corresponds to a compacting fill.
  • the frictional forces are high, the bulk material to be treated is heated up considerably.
  • the bulk material movement states shown in FIGS. 5b and 5c only become set briefly and at intervals.
  • Increased centrifugal machine speeds serve to transfer the cooled bulk material through the through openings into the next processing zone.
  • the increased axial feed of the bulk material is achieved within a few seconds, so that in a subsequent longer time interval the cooling mixer can be operated at a centrifugal speed which results in a bulk material movement, as shown in FIG. 5a.
  • the device is provided with a pole-changing or steplessly adjustable drive so that the product states of FIGS. 5b and 5c can be set from time to time.
  • the cooling process itself takes place on the basis of a bulk material movement that takes place in the pile, i.e. that is, the spinner is operated with a Froude number of Fr ⁇ 1.
  • FIG. 6 shows a solid mixer 150 which is operated as a continuously operating mixer.
  • a drum 151 receives a shaft 152.
  • the mixing elements are arranged on the shaft 152.
  • Bulk material is fed into the product interior of the solid mixer 150 via a feed nozzle 153 and the treated bulk material is drawn off via an emptying nozzle 154.
  • the bulk materials flow into the solid mixer 150 and the treated bulk materials flow out again.
  • Cutting discs divide the product interior into individual, independent processing zones. The bulk materials are mixed both radially and axially within the processing zones.
  • FIG. 7a shows an exemplary embodiment of a quasi-continuously operating solid mixer 160, the drum 161 of which receives a shaft 162 and on which a loading nozzle 163 and an emptying nozzle 164 are arranged.
  • Bulk material is introduced in batches into the product interior of the drum 161 in the direction of the arrows 165, 166 and the treated bulk material is continuously discharged in the direction of the arrow 167.
  • the quasi-continuous mode of operation results in FIG. 7a from a batch-wise product entry and a continuous product discharge.
  • FIG. 7b shows a further exemplary embodiment of a quasi-continuously operated solid mixer 170.
  • a drum 171 the bulk material flowing in via a feed nozzle 173 is processed by means of rotating mixing tools arranged on a shaft 172.
  • the treated bulk material is discharged via an emptying nozzle 174.
  • the solids mixer 170 is continuously charged in the direction of the arrow 175 and the product is discharged batchwise in the direction of the arrows 176, 177.
  • the product interior of the solid mixer 170 can be divided into several processing zones.
  • the product flow in the product interior of the mixer 170 can be controlled in such a way that product from the first processing zone, which is arranged near the feed nozzle 173, is transferred to the second processing zone as quickly as possible.
  • the other processing zones are also filled with product. Because the first processing zone is emptied faster than the subsequent processing zones, it can take up the continuous product flow in the direction of the arrow 175 without interference and a product jam or overfilling of the first processing zone is prevented.
  • the length-diameter ratio in the case of solid mixers operated continuously and quasi-continuously is usually greater than two and the position of the feed nozzle to the discharge nozzle is such that the distance between them is as large as possible.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Accessories For Mixers (AREA)
  • Disintegrating Or Milling (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Detergent Compositions (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Confectionery (AREA)

Claims (7)

  1. Procédé pour mélanger et traiter thermiquement des particules de solides ;
    dans lequel les particules de solides sont introduites, par une ouverture de chargement (23) dans une chambre d'entrée d'un récipient (11) disposé horizontalement ;
    dans lequel les particules de solides peuvent être mises en mouvement, pour le traitement du produit et pour le transport du produit, à l'intérieur du récipient (11) composé d'au moins trois chambres séparées par des cloisons (76, 78, 80 ; 91 ; 99 ; 108) disposées transversalement à l'axe longitudinal et présentant au moins une ouverture de passage (77, 79, 81 ; 92 ; 101 ; 109), au moyen d'au moins un outil (86) présent dans chaque chambre, disposé radialement sur un arbre (14 ; 62) qui s'étend dans la direction longitudinale et présente un moteur d'entraînement ;
    l'outil (86) entraînant les particules de solides tangentiellement et/ou axialement ;
    les particules de solides étant évacuées d'une chambre de sortie du récipient (11) dispose horizontalement, en passant par une ouverture d'évacuation (26) ;
    dans lequel le traitement du produit s'effectue en amas et le transport du produit s'effectue à l'intérieur du récipient (11) dans un état fluidisé de la matière en vrac ;
    dans lequel, soit la matière en vrac à traiter est introduite dans la chambre d'entrée par charges distinctes et est évacuée de la chambre de sortie en continu, soit la matière en vrac à traiter est introduite en continu dans la chambre d'entrée et evacuée de la chambre de sortie par charges distinctes ;
    dans lequel les particules de solides sont traitées thermiquement au moyen d'une enveloppe qui entoure le récipient (11) sur presque toute la longueur, sur plus de 180° mais moins de 360° dans la direction circonférentielle ;
    et dans lequel l'enveloppe est divisée en un ou plusieurs segments selon l'axe longitudinal du récipient (11), et chaque segment presente une conduite d'alimentation (41, 42, 43 ; 97 ; 104) d'un côté et une conduite d'évacuation (54 ; 98 ; 105) de l'autre côté, conduites qui s'étendent dans la direction axiale sur presque toute la longueur de chaque segment de l'enveloppe, et débouchent aussi dans l'enveloppe sur toute cette longueur.
  2. Machine pour mélanger et traiter thermiquement des particules de solides, comprenant un récipient (11) disposé sensiblement horizontalement, qui est traversé selon son axe longitudinal par un arbre (14 ; 62) muni d'un moteur d'entraînement, une ouverture de chargement (23) et une ouverture d'évacuation (26) prévues sur le récipient (11), le récipient (11) étant divisé, transversalement à l'axe longitudinal, entre l'ouverture de chargement (23) et l'ouverture d'évacuation (26), en au moins trois chambres reliées l'une à l'autre, au moyen de cloisons (76, 78, 80 ; 91 ; 99 ; 108) présentant au moins une ouverture de passage (77, 79, 81 ; 92 ; 101 ; 109) et comprenant, dans chaque chambre, au moins un outil (86) disposé radialement sur l'arbre (14 ; 62), l'outil (86) étant approprié pour transmettre aux particules de solides une impulsion de mouvement dirigée tangentiellement et/ou axialement, caractérisée en ce que le récipient (11) est muni d'une enveloppe pour le traitement thermique des particules de solides, enveloppe qui entoure le récipient (11) sur plus de 180° mais moins de 360° dans la direction circonférentielle, en ce que l'enveloppe est prévue sur presque toute la longueur de la machine, et est divisée, le long de l'axe longitudinal du récipient (11), en un ou plusieurs segments, et chaque segment présente une conduite d'alimentation (41, 42, 43 ; 97 ; 104) sur un côté de l'enveloppe et une conduite d'évacuation (54 ; 98, 105) sur l'autre côté de l'enveloppe, conduites qui s'étendent dans la direction axiale, presque sur toute la longueur de l'enveloppe de chaque segment et débouchent aussi dans l'enveloppe sur toute cette longueur, en ce que le segment de la circonférence qui n'est pas occupé par l'enveloppe se trouve dans la région supérieure du récipient (11) et en ce qu'au moins une cloison (76, 78, 80 ; 91 ; 99 ; 108) ne présente les ouvertures de passage (77, 79, 81 ; 92 101 ; 109) que dans sa région supérieure.
  3. Machine selon la revendication 2, caractérisée en ce que les segments de l'enveloppe admettent un apport de chaleur et/ou une évacuation de chaleur indépendamment les uns des autres.
  4. Machine selon une des revendications 2 ou 3, caractérisée en ce que l'enveloppe est composée de demi-tubes (40 ; 94 ; 102 ; 111) soudés sur la paroi extérieure du récipient, qui sont reliés à la conduite d'alimentation (41, 42, 43 ; 97 ; 104) et à la conduite d'évacuation (54 ; 98 ; 105).
  5. Machine selon une des revendications 2 à 4, caractérisée en ce que les cloisons (76, 78, 80 ; 91 ; 99 ; 108) peuvent être refroidies et/ou chauffées.
  6. Machine selon une des revendications 2 à 5, caractérisée en ce que l'arbre (14 ; 62) et les outils (86) forment un équipage centrifuge qui peut être refroidi ou chauffé.
  7. Machine selon une des revendications 2 à 6, caractérisée en ce que le moteur d'entraînement est un moteur à nombre de pôles variable ou un moteur à nombre de tours réglable par variation continue.
EP90915295A 1989-10-24 1990-10-21 Procede et dispositif pour l'agitation e le traitement thermique de particules solides Expired - Lifetime EP0500561B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3935290 1989-10-24
DE3935290 1989-10-24
PCT/DE1990/000800 WO1991006364A1 (fr) 1989-10-24 1990-10-21 Dispositif pour l'agitation de particules solides

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EP0500561A1 EP0500561A1 (fr) 1992-09-02
EP0500561B1 true EP0500561B1 (fr) 1994-07-06

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US (1) US5275485A (fr)
EP (1) EP0500561B1 (fr)
JP (1) JP2585867B2 (fr)
AT (1) ATE108090T1 (fr)
DE (1) DE59006379D1 (fr)
ES (1) ES2060201T3 (fr)
WO (1) WO1991006364A1 (fr)

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DE102020200602A1 (de) 2020-01-20 2021-07-22 Thyssenkrupp Ag Thermische Behandlung von mineralischen Rohstoffen mit einem mechanischen Wirbelbettreaktor
DE102020200605A1 (de) 2020-01-20 2021-07-22 Thyssenkrupp Ag Vorrichtung und Verfahren zur Herstellung von Zementklinker mit einem mechanischen Wirbelbettreaktor
DE102020200604A1 (de) 2020-01-20 2021-07-22 Thyssenkrupp Ag Vorrichtung und Verfahren zur Herstellung von Zementklinker
WO2021148266A1 (fr) 2020-01-20 2021-07-29 Thyssenkrupp Industrial Solutions Ag Dispositif et procédé de production de clinker de ciment
WO2021148267A1 (fr) 2020-01-20 2021-07-29 Thyssenkrupp Industrial Solutions Ag Traitement thermique de matières premières minérales à l'aide d'un réacteur à lit fluidisé mécanique
LU101612B1 (de) 2020-01-20 2021-08-05 Thyssenkrupp Ind Solutions Ag Vorrichtung und Verfahren zur Herstellung von Zementklinker
LU101611B1 (de) 2020-01-20 2021-08-05 Thyssenkrupp Ind Solutions Ag Vorrichtung und Verfahren zur Herstellung von Zementklinker mit einem mechanischen Wirbelbettreaktor
LU101613B1 (de) 2020-01-20 2021-08-06 Thyssenkrupp Ag Thermische Behandlung von mineralischen Rohstoffen mit einem mechanischen Wirbelbettreaktor

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DE102020200602A1 (de) 2020-01-20 2021-07-22 Thyssenkrupp Ag Thermische Behandlung von mineralischen Rohstoffen mit einem mechanischen Wirbelbettreaktor
DE102020200605A1 (de) 2020-01-20 2021-07-22 Thyssenkrupp Ag Vorrichtung und Verfahren zur Herstellung von Zementklinker mit einem mechanischen Wirbelbettreaktor
DE102020200604A1 (de) 2020-01-20 2021-07-22 Thyssenkrupp Ag Vorrichtung und Verfahren zur Herstellung von Zementklinker
WO2021148266A1 (fr) 2020-01-20 2021-07-29 Thyssenkrupp Industrial Solutions Ag Dispositif et procédé de production de clinker de ciment
WO2021148267A1 (fr) 2020-01-20 2021-07-29 Thyssenkrupp Industrial Solutions Ag Traitement thermique de matières premières minérales à l'aide d'un réacteur à lit fluidisé mécanique
LU101612B1 (de) 2020-01-20 2021-08-05 Thyssenkrupp Ind Solutions Ag Vorrichtung und Verfahren zur Herstellung von Zementklinker
LU101611B1 (de) 2020-01-20 2021-08-05 Thyssenkrupp Ind Solutions Ag Vorrichtung und Verfahren zur Herstellung von Zementklinker mit einem mechanischen Wirbelbettreaktor
LU101613B1 (de) 2020-01-20 2021-08-06 Thyssenkrupp Ag Thermische Behandlung von mineralischen Rohstoffen mit einem mechanischen Wirbelbettreaktor

Also Published As

Publication number Publication date
ATE108090T1 (de) 1994-07-15
EP0500561A1 (fr) 1992-09-02
WO1991006364A1 (fr) 1991-05-16
JPH05505551A (ja) 1993-08-19
JP2585867B2 (ja) 1997-02-26
DE59006379D1 (de) 1994-08-11
US5275485A (en) 1994-01-04
ES2060201T3 (es) 1994-11-16

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