JPS6049018B2 - Rotating stratification device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a rotating stratified container, in which a substantially horizontal dish-shaped rotor is disposed between a blowing chamber located below and an operating chamber located above; - the rotor is rotatably driveable about at least a substantially vertical axis, and the rotor forms part of a control valve of an annular gap located on the outer circumferential side of the rotor and interconnecting the two chambers; There is information about equipment.

The above-mentioned type of rotating stratification device is disclosed in German patent application P3OO57.
7O. This is proposed in No. 6-41.

In the proposed rotating stratifying device, the rotor is adjustable along its rotational axis, and an annular seat for the rotor is formed on the wall of the rotating stratifying container, and the rotor is positioned at the end position of the axial adjustment relative to the annular seat. It is configured to contact as a valve body that closes the ventilation chamber upward. This rotating stratification device can fill the working chamber by stopping the rotational drive of the rotor and completely separating the working chamber above it from the blowing chamber below, or interrupt operation for a short time to clean the filter. However, it is also possible to discharge the product from the working chamber after the completion of the granulation process, so it is highly practical. A positive pressure can be generated in the blower chamber until the annular gap between the annular seat and the rotor is reopened at the start of a new operation. Therefore, in the rotating stratification device according to the above proposal, it is possible to reliably prevent the granulated material or the granulated product as a product from falling into the ventilation chamber in any operating state. In the swirling stratification device according to the proposal, since the height of the rotor is adjustable, as described in German Patent Application Publication No. 2805397, the flow state in the swirling stratification vessel, particularly in the working chamber, can be controlled by the circulating air flow rate. It is possible to easily adapt it to different granulation materials and the associated different operating conditions, regardless of the size of the grain. On the other hand, a problem inherent in this swirling stratification device is that the granulate particles accelerated radially outward by the rotor toward the upper region of the annular gap often impinge excessively against the walls of the swirling stratification vessel. There are things to do. Such collisions occur because the kinetic energy of the gas, generally heated and dry air, flowing from the blast chamber through the annular gap into the working chamber is insufficient to swirl and stratify the granular quaternized material, which is accelerated outwardly by the rotor. This occurs when it is not possible to deflect it upwards without impacting it against the walls of the container, or with only a small amount of energy. Therefore, in the above-mentioned swirl stratification apparatus, it is necessary to readjust the rotational speed of the rotor each time in accordance with the gas inflow speed determined by the gas pressure in the blowing chamber and the adjustment width of the annular gap. Therefore, optimal adjustment for all operating conditions is difficult and requires skill. SUMMARY OF THE INVENTION The object of the invention is to improve a swirl stratification device of the above-mentioned type so that the material accelerated by the rotation of the rotor can be appropriately deflected upwards independently of the adjusted cross-sectional shape of the gas flow path. There is.

In order to achieve this object, the present invention arranges a height-adjustable annular connecting member around the rotor, the connecting member opens the annular gap when it is in the lower position, and the annular gap is opened by the connecting member when it is in the upper position. The annular gap is closed by the connecting member and its upper surface forms a smooth transition between the upper surface of the rotor and the upper wall area of the container.

According to the above-described configuration of the invention, the height adjustment of the rotor, independent of the adjusted width of the annular gap, is made particularly suitable for the material flow with respect to the respective cross-sectional shape of the rotor itself and of the upper wall region of the swirling stratified container. It becomes possible to do this in various ways.

As a result, the rotational speed of the rotor can be arbitrarily and significantly changed in accordance with the properties of the material to be treated and the style of the treatment process, independent of the width of the annular gap, and the material can be can prevent excessively strong collisions. In particular, even when the annular gap is adjusted to be narrow, the rotational speed of the rotor can be set high. Therefore, it is possible to form an effective swirling bed in the working chamber even with a relatively small amount of gas, thereby reducing the required energy. Preferably, the upper surface of the rotor has a concave shape in its outer edge region.

Additionally or alternatively, the upper surface of the connecting member and the upper edge region of the swirling stratified vessel may be formed in a concave shape, an arrangement which deflects the material accelerated by the rotor upwards as softly as possible. can do. FIG. 3 of German Patent No. 21654(9) discloses a swirling stratification device, in which a deep-dish rotor having a concave outer wall region is arranged in a swirling stratification container, and the outer wall region and In this case, the wall regions of the swirling stratified container separated by an annular gap are likewise formed in a concave shape.

With such an arrangement, the material accelerated outwardly by the rotor flows upwardly over the annular gap and along the concave wall region of the swirling stratified vessel. However, this known arrangement does not allow the width of the annular gap to be varied. In a preferred embodiment of the invention, a cylindrical lower wall region is formed below the upper wall region of the container, by means of which the connecting member is guided in an axially displaceable manner.

Preferably, the connecting member is provided with an inner surface which increases in diameter in a conical manner towards the top, which inner surface is arranged as a valve seat in conjunction with the complementary shaped outer surface of the rotor. The rotating stratification device of the present invention can vary the operating conditions widely,
Moreover, since it is possible to always produce a desired toroidal-shaped swirling motion on the material to be treated, the range of application can be greatly expanded compared to known devices.

The device according to the invention can therefore be used on the one hand for granulation and, on the other hand, for pelletizing and/or coating granulated materials. In order to cause the material to roll radially outwardly on the rotor, an annular or helical groove is preferably formed in the upper surface of the rotor. Hereinafter, the present invention will be described with reference to illustrated embodiments.

The rotating stratification apparatus according to this embodiment includes a rotating stratification container 10, which includes a bottom plate 12 and a cylindrical lower part 1 with a large wall thickness.
4 and a similarly cylindrical upper part 16 of small wall thickness,
The upper end of this upper part is formed as a flange 18.

A filter housing 20, the detailed structure of which is not shown, is connected to the flange 18. A ventilation chamber 24 is defined in the upper region of the lower part 14 by a horizontal intermediate wall 22 .

The upper part 16 surrounds the working chamber 26 . Both rooms 24, 26
A substantially horizontal dish-shaped rotor 28 is arranged coaxially with the lower part 14 and upper part 16 of the container 10 between them. The rotor 28 is fixed to the upper end of a vertical shaft 30, which is supported by a bearing 32 so as not to be axially displaceable.

The bearing 32 is rigidly supported within the lower portion 14 of the container 10 by a bracket 34. A continuously adjustable electric motor 36 connected to the vertical shaft 30 is flange-coupled to the bracket 34 . A cylindrical lower wall region 40 is provided on the inner wall of the container 10 at the outer periphery of the rotor 28 and is formed by boring and grinding to have high dimensional accuracy and precise surface roughness.

An axially displaceable annular connecting member 42 is arranged in this wall region 40 and is guided in a sealing manner on a cylindrical outer circumferential surface 44 . The connecting member 42 is made of a material, such as a plastic material, which has a small coefficient of friction and is resistant to wear with respect to the container 10 and the rotor 28, which are generally made of stainless steel. The connecting member 42 is formed with an inner surface 46 whose diameter increases in a conical shape toward the top,
This inner surface is brought into close contact with the complementary shaped outer circumferential surface 48 of the rotor 28 at the location of the connecting member shown in solid lines in FIGS. 1 and 2. A concave upper surface 50 in the outer peripheral edge region of the rotor 28
, and to this upper surface, the similarly concave upper surface 52 of the connecting member 42 at the upper end position shown in the figure is connected continuously and without any irregularities.

Furthermore, a similarly concave annular upper edge region 54 of the container 10 is continuously connected to the upper surface 52 of the connecting member 42 .
This upper edge region 54 forms, together with the cylindrical lower wall region 40 , an annular edge which forms the lower part 14 of the container 10 .
and the upper part 16. However, the annular edge, like the annular outer peripheral edge of the upper surface 50 of the rotor 28, does not appear when the connecting member 42 is in the upper end position. Three lifting devices 56 are provided in the lower part 14 of the container 10 to adjust the axial position of the connecting member 42.
are spaced apart from each other by 1200 mm.

The lifting device 56, only one of which is shown in FIG. Connection member 42
is capable of stepless reciprocation by a lifting device 56 between an upper end position shown by a solid line that isolates the ventilation chamber 24 from the working chamber 26 and a lower end position shown by a dashed line in FIG. It can be fixed at an intermediate position. The connecting member 42 forms a somewhat wider annular gap 62 at each position other than the upper end position 9, which gap is defined on the one hand by the inner surface 46 of the connecting member 42 and on the other hand by the outer surface of the rotor 28. As shown in FIG. 2, the width of the annular gap is maximum when the connecting member 42 is at the lower end position. In the illustrated example, the rotor 28 is provided with a conical central protrusion 64, and a spiral groove 66 is formed in a region of the upper surface 50 where this protrusion is not provided.

A spray nozzle 68 is disposed within the working chamber 26 and a conduit 70
The spray liquid can be ejected from the nozzle 68.

Leading out the exhaust conduit 72 from the filter housing 20,
This exhaust conduit is connected to a blower pipe 74 that reaches the blower chamber 24 via a known dehumidifier, heat exchanger, blower, etc. (not shown). An example of such a construction is shown in FIG. 1 of German Patent No. 2,805,397.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a rotating stratification apparatus according to an embodiment of the present invention; FIG. 2 is an enlarged view of the main part of FIG. 1; and FIG.
It is a partial plan view seen from the arrow ■ direction of the figure. 10... Rotating stratified container, 24... Blowing chamber, 26... Working chamber, 28... Rotor,
40... Lower wall area of container 10, 42...
- Connection member, 46...Inner surface of connection member 42, 4
8: Outer surface of rotor 28, 50: Upper surface of rotor 28, 52: Upper surface of connecting member 42, 54: Upper wall region of container 10 , 62...
...Annular gap, 66...Top surface 50 of rotor 28
groove.

Claims (1)

[Scope of Claims] 1. A rotating stratified container 10 is provided, in which a substantially horizontal dish-shaped rotor 28 is disposed between a blowing chamber 24 located below and a working chamber 26 located above; 28 is rotatably driven at least about a substantially vertical axis, and is located on the outer circumferential side of the rotor 28 so that both chambers 2
4 and 26, in which the rotor 28 forms a part of the control valve for the annular gap 62 that connects the rotor 4 and 26 with each other, a height-adjustable annular connecting member 42 is disposed around the rotor 28, and is placed in a lower position. When the connecting member 42 is in the upper position, the annular gap 62 is opened, and when the connecting member 42 is in the upper position, the annular gap 62 is opened.
closes the annular gap and its upper surface 52 closes the upper surface 50 of the rotor 28 and the upper wall region 5 of the container 10.
A swirling layering device characterized in that it forms a smooth transition between two layers. 2. The rotating layering apparatus according to claim 1, wherein the upper surface 50 of the rotor 28 is formed in a concave shape. 3. The rotating layering apparatus according to claim 1 or 2, wherein the upper surface 52 of the connecting member 42 is formed in a concave shape. 4. The swirling layering device according to any one of claims 1 to 3, wherein the upper wall region 54 of the container 10 is formed in a concave shape. 5. In the swirling stratification apparatus according to any one of claims 1 to 4, a cylindrical lower wall region 40 is formed below the upper wall region 54 of the container 10, and A rotating layering device characterized in that a side wall region guides a connecting member 42 so as to be displaceable in the axial direction. 6. In the swirling layering device according to any one of claims 1 to 5, the connecting member 42 is provided with an inner surface 46 whose diameter increases conically upward, and this inner surface is formed into a valve. an outer surface 48 having a complementary shape to the rotor 28 as a seat;
A rotating stratification device characterized in that it is arranged in relation to. 7. The swirling layering device according to any one of claims 1 to 6, characterized in that an annular or spiral groove 66 is formed on the upper surface 50 of the rotor 28. .