DE2421278A1 - APPARATUS FOR THE TREATMENT OF FLUIDIZED MATERIALS - Google Patents

Description

PATENTANWÄLTE 9 A 9 1 9 7 PiPL.-INO MARTIN LICHT ^{Z LL}

DR. 2E - ^ · ■ 'ίCHMIDT

DiP: -V ^! . .v.'il.-i.-iG. ^ NSMANN

DIPL-F- ".YS / SB.. ^{: L.irv.vJANN}

MUNICH 2 THfcRES! ENSTRASSE 33

Munich, May 2, 1974

Anhydro A / S, 0stmarken 8, 2860 S0borg, Denmark Apparatus for treating fluidized materials.

The present invention relates to an apparatus for treating fluidized materials, having at least one perforated distributor plate, which is set up to air or gas for fluidizing one over the relational. the material present in the distribution plates to be flowed through, the distribution plate or each Distribution plate across to the throughput direction of the Separating plates running in pairs and belonging together in pairs above or below the distributor plate into a Number of sections divided, and v / o those above the

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Distributor plate attached partition plates set up in such a way are that they are removed from their abutment against the plate can be.

Apparatus of this type are fluidized for treatment Materials applied where different in each section Processes or sub-processes are carried out. An apparatus of this type can, for example, be used for granulation powdery material can be applied by moistening the material in a fluidized state and agglomerated in a first section, after which the agglomerated material in a fluidized state in another Section is dried and finally cooled in a third section. Apparatus of this type can also be used can be used for multi-stage drying processes where, for example, part of the drying process takes place in a first Stage is carried out in a first section at a drying air temperature, while another stage the drying process in another section at a another temperature, and a third stage of the drying process in a third section at a third temperature takes place, after which, for example, the material can be cooled in a fourth section. In the individual sections, the layer of fluidized material is essentially the same height as the transverse Have partitions above the distributor plate, and if the apparatus is to be emptied it is necessary, these Remove partitions from their installation against the distributor plate, so that the .material in the different sections can be fed freely to the material outlet opening of the apparatus. Such removal of the partition plates of the distributor plate is usually done by rotating it around one in the longitudinal direction of the partition plates running axis can be swiveled out of its system against the distribution plate, which is done by matching, from outside the apparatus can be operated aids.

In apparatus of this type which are to be used for the same treatment of one and the same material, It is possible on an empirical basis to change the size, i.e. the base area, of the individual sections by corresponding

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Placement of the opposite one another], j es-end en partition walls above and below the distributor plate to be dimensioned in such a way that optimal operating conditions in terms of production output and . the quality of the treated material can be achieved.

However, if one wants to change the treatment of one and the same material or materials with one and the same apparatus Treat with different properties, then the problem may arise that the ratio of the base areas of the different Sections to each other do not always correspond to the optimal operating conditions, which is reduced Production output and / or a reduced quality of the product can result. This problem is through an example explained in more detail.

ν An apparatus for fluidized agglomeration powdery Materials consist of a first section for moistening and agglomeration, and another section for Drying and a third section for cooling the material.

When a certain product is agglomerated, for example, it is moistened by adding water of 10 o / o to the dry matter in the first section. This amount of water is then evaporated again in the second section, namely at a drying temperature of, for example, 80 C in the fluidized layer, and then becomes the material cooled to 40 ° C in the third section. Of the second and third sections can be the same size for this task, for example.

It is also assumed that the same apparatus is then used to agglomerate another material, which is also supplied with 10 o / o moisture in the first section, whereas in the fluidized one for drying the material Layer in the other section only a drying temperature of 75 C may be used. This diminishes

2 the drying capacity in kg per m drying area in the second section and per hour, for example, is approx. 20 o / o, while, on the other hand, the material is cooled down to an unnecessarily low temperature in the third section, partly to Because of the lower drying temperature in the other section and partly because of the reduced material throughput.

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The purpose of the present invention is to provide an apparatus of the type indicated above with which it is possible to achieve optimal operating conditions within wide limits, even if different materials and / or different treatment modalities exist.

According to the invention, this is achieved in that at least some of the mating partition plates above and below the distribution plate or each distribution plate in such a way are set up so that their · contact against the distributor plate in a fixable manner in or against the throughput direction of the material can be moved through the apparatus.

With such a configuration of the apparatus, the ratios of the base area sizes of the individual sections in relation to one another in such a way that optimal operating conditions are achieved.

In an apparatus of the above example you can thus by moving the partitions between the second and the third section in such a way that the base area of the first section is approx. 20 o / o larger and the base area of the the last section becomes correspondingly smaller, a capacity increase of approx. 20 o / o can be achieved.

An embodiment of the apparatus according to the invention, in which the one above the distributor plate or the distributor plates Attached partitions from their abutment against the plate by rotating about a parallel with the distributor plate Removed axis running transversely to the direction of throughput of the material ■ is peculiar in that at least some of these separating plates are attached to the axis so that they can be moved.

While it poses no constructional difficulties, the partition plates attached under the distributor plate to set up within the meaning of the invention by attaching these partition plates in a simple manner to the side walls of the apparatus Rails can be slidably attached, the attachment according to the invention leads to the distribution plate attached partition plates to certain construction problems ·, partly because the air at this point with material particles is mixed, so that leaks must be avoided, and partly because the separating plates are opposite both to the distributor plate should be slidable and should also be able to be removed from their system against the plate. These problems will be

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solved by the specified measures.

In the case of an early execution game, the relevant partitions attached to at least one arm, the extends essentially parallel to the direction of material throughput and is displaceable with respect to the axis of rotation is attached. . '

This means that the partition plates are independent of the position they are in as a result of their displacement occupy the distributor plate! can always be made to essentially do so when they rest against the plate standing at right angles to her. This avoids that directly adjoining the partition walls, dead "pockets" in the fluidized layer are formed, which pockets the size of the effective base area of the section in question would decrease, and moreover, the height of the fluidized layer thereby remains at different settings of the separating plates of the apparatus constant.

The invention is explained in more detail below with reference to the drawing.

1 shows schematically a longitudinal section through an exemplary embodiment of the apparatus according to the invention, and

2 shows, on a larger scale, part of a distributor plate in the apparatus according to the invention with an upper and a lower partition plate in contact with the distributor plate. 1 shows an apparatus generally indicated by 1 is, for fluidized agglomeration of powdery material. The apparatus has a perforated distribution plate 2 on, · by upper partition plates J5, ^ and 5 and lower partition plates 6 and 7 in three sections A, B and C above the distributor plate and corresponding spaces D, E and F below the plate is divided. A fan 8, 9 or 10 is connected to each of the rooms D, E and F, the fan 9 is connected to the room E via a heating unit 11. Section A is connected to a humidifier 12, and following the section C, a material drain 13, 12a is attached. The apparatus 1 also has a powder silo 14, which is connected to the apparatus via a funnel 15, as well as an air supply line 16, which is connected to a suction fan 17 via a powder separator 18 is connected, the latter via a lock 19 can be connected to the funnel 15.

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The upper dividers 3 and h are attached to cranked arms 20 and 21, respectively, which extend substantially in the direction of flow of the material through the apparatus 1. In the exemplary embodiment shown, each of the partition plates 3 and 4 has two of these arms 20 and 21, in that the arms are each attached to one side of the apparatus 1. The . Arms 20 and 21 are slidably mounted in through bores in shafts 22 and 23, respectively, which extend transversely through the apparatus 1 parallel to the distributor plate 2 * and which are rotatable from the outside, the arms being displaceable in the directions indicated by the arrows b . The upper partition plate 5 is attached to a shaft 2k , which runs in the same way as the shafts 22 and 23 and, like the latter, can be rotated from the outside.

The lower dividing plates are in the lower part of the apparatus 1 rotatably fastened with the aid of fastening means, the longitudinal rails (not shown) in the side walls of the apparatus 1 are mounted so that the partition plates 6 and 7 are oriented in the directions shown by arrows a are movable.

Fig. 2 shows on a larger scale part of a distributor plate 2a, a lower partition plate 6a and an upper partition plate 3a, which is attached to arms 20a, which in this Execution example as straight round bars. Are designed, and only one arm of which is shown. The arms 20a are through bores 25 in a shaft 22a extending transversely to the apparatus out and can in the bore 25 by clamping screws 26 be clamped.

Above shafts 22 and 23 or 22a are in both side walls of the apparatus 1 attached openings, not shown, through which the arms 20 and 21 or 20a moved and the shafts 22 and 23 or 22a can be clamped opposite. These openings are with tightly closing, However, easily removable lids are provided.

Alternatively, the arms can be displaceable from the outside, e.g. by means of a rack and pinion mechanism.

The apparatus works as follows:

The powder material to be agglomerated, for example the section from the silo 1 # through the funnel 15 is fed, and in this section the material is fed in by the fan 8 through the space D and the distributor plate 2

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flowing amount of air fluidized. At the same time that will Powder material moistened with the aid of the Eefeue.h '& ungsaggrsgates 12, so that agglomerates form when the fluidized Layer a height corresponding to the upper edge of the partition plate 3 reached, the agglomerated particles are in · the section B transferred, where it is fluidized and in the by the fan S * via the heating unit II and through the room E and the distributor plate 2 stream metides, in, the heating unit heated amount of air to be dried. When the fluidized Layer in section B one of the height of the partition plate 4 corresponding Reached altitude, the dried and, warned, agglomerated particles are transferred to section C, where they fluidized and cooled in the amount of air flowing from the fan 10 through the hood F and the distributor plate 2 If the height of the fluidized layer in section C reaches a height corresponding to the height of the partition plate 5; then will the cooled, agglomerated particles in the outlet IJ transferred, from where they are removed through a sieve IJa can. Non-agglomerated powder particles are removed from the suction air through the air outlet line to the powder separator 18, from where they can be fed back to the funnel 15 through the lock 19. The exhaust air is discharged by the fan 17.

During operation, all three sections A, B and C are up to the top of the separating plates 3 # 4 and 5 with fluidized material filled, and when the apparatus 1 is emptied, the partitions 3 and 4 by the outside Rotating the shafts 22 and 23 to the position indicated in phantom for the plate 4 with 4 '. Simultaneously the partition plate 5 is rotated by turning the shaft 24 on the outside into a horizontal position. In this position the separating plates, the powder material can be removed quickly through the outlet 13.

* Should the apparatus according to the invention be adapted to other operating conditions are set, e.g. the partition plates 6 and 7 are first loosened and moved into a position that corresponds to the desired new base area ratio between sections A, B and C, whereupon the partition plates in be clamped in the new position. After that, the

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tightly fitting lid on the sides of the apparatus 1 removed from shafts 22 and 23, arms £ 0, 21 are loosened, and the partitions 3 and 4 are shifted in such a way that the desired base area ratio between the sections arises. The arms 20 and 21 are then clamped again in the shafts 22 and 23, and the removed ones Lids are put back on, after which the device is ready for use.

In the event that only one of the matching sets of dividers 3 * 6 or 4, 7 to achieve the desired Base area ratio is to be shifted, as was the case in the example given in the introduction the measures listed are of course only for this one Set carried out.

As mentioned, the apparatus can be set up in such a way that the arms 20, 21 can be displaced from the outside. Since the Separation plates β and 7 can be displaced in a corresponding manner from the outside, there is the possibility that the Base area ratios between sections A, B and C can be changed during operation if the external operating conditions should change for one reason or another.

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Claims (2)

1. Apparatus for the treatment of fluidized material, with at least one perforated distribution plate, which is set up for the flow of air or gas to pluidize material present over the or the distribution plates, the distribution plate or each distribution plate through transversely to the throughput / direction of the Material running, paired separating plates above or below the distributor plate is divided into a number of sections, and where the separating plates above the distributor plate can be removed from their abutment against the plate, characterized in that at least some of the separating plates belonging together above and below the distributor plate or each distribution plate are set up in such a way that their contact against the distribution plate can be displaced in a fixable manner in or against the direction of throughput of the material through the apparatus. 2. Apparatus according to claim 1, where the partition plates above the distributor plate or each distributor plate can be removed from their abutment against them by rotating about an axis running parallel to the distributor plate transversely to the direction of material throughput, characterized in that at least some of these partition plates can be displaced transversely with respect to the axis are attached. 3. Apparatus according to claim 2, characterized in that the relevant partition plates are attached to at least one arm which runs essentially parallel to the direction of material throughput and which is transversely displaceable opposite the axis of rotation. 409848/0990