DE1044722B - Sieve centrifuge, in particular sugar centrifuge - Google Patents

Description

For procedural reasons, when extracting sugar it is necessary to use the sieve centrifuge to separate the centrifuged syrup according to its degree of purity. There are various options for this Centrifuge types known, with which the syrup types from each other when centrifuging be separated.

One of these known types has a plurality of annular rings attached to the inside of the centrifuge housing Baffle groups, which are displaceable in the direction of the centrifuge axis and thereby with can be connected to separate channels. Guide rings are arranged on the outside of the sieve drum, between which the centrifuged syrup emerges in the form of a disk and against which, depending on the consistency and the degree of purity of the exiting syrup by moving it axially into the corresponding one Baffle groups placed in the discharge position are hurled to be discharged into the intended channel to become.

The guide rings drawn onto the sieve drum increase the centrifugal forces acting on the drum and increase the moment of inertia of the sieve drum, so that a large one for the drum drive Drive power is required and a considerable amount of kinetic energy when braking the drum destroy is. Furthermore, the production and shrink-fitting of the guide rings is expensive, since for safety reasons only high quality and carefully processed material may be used.

A sugar centrifuge has also become known in which the centrifuged mother and Deck syrup by pivoting vertical catch walls into separate annular channels is discharged. In one pivot position, the catch walls form a closed cylindrical catch surface, which directs the syrup into the inner gutter. The catch walls are in the other swivel position radial, and the syrup is directed into the outer gutter by a fixed cylindrical outer wall. With this device, a sharp separation of mother and top syrup is not possible because the walls previously sprayed with syrup of one quality in the area of the gutter for syrup of the other quality can be panned.

The invention relates to a sugar centrifuge of the last-mentioned type, in which the centrifuged Mother syrup and top syrup by pivoting vertical catch walls into separate ring-shaped ones Gutters is discharged, and it consists in the fact that one channel with a distance in the other channel is arranged and the horizontally pivotable catch walls are pivotable by 180 °, in the cover both catch positions and on one

Sieve centrifuge,
especially sugar centrifuge

Applicant:

Machine factory Buckau R. Wolf
Aktiengesellschaft, Grevenbroich

Kurt Pause, Grevenbroich,
has been named as the inventor

Side have a drip tray covering one side of the inner channel.

This ensures that for each catching position one of the opposing surfaces of the Catch walls are used to catch the syrup and the drip trays that cover the inner channel on one side In every catching position, drain the dripping syrup into the outer gutter, so that a sharp Separation of mother and top syrup is guaranteed.

The catch walls are at the upper end with a pin or the like in radial direction to the longitudinal axis of the centrifuge Guide slots or the like of an adjusting ring rotatable about the longitudinal axis of the centrifuge, the serves to pivot the catch walls.

The invention is described with reference to an embodiment shown in the drawing. It shows

Fig. 1 is a longitudinal section through the centrifuge with the left and right in different positions Safety walls,

Fig. 2 is a plan view of part of the catch walls on an enlarged scale, with left and right containment walls in different positions,

Fig. 3 is a top view of the catch walls according to Fig. 2 with the adjusting ring arranged above it,

Fig. 4 is a side view of the catch walls shown on the right in Figs. 2 and 3,

Fig. 5 is an end view of the catch walls according to Fig. 4.

In the centrifuge housing consisting of an upper part 1 α and a lower part 1 b , a drum shaft 2, to which a sieve drum 3 is attached, protrudes in a known manner.

S09 679/595

On the inside of the upper part 1 α an angle iron ring 4 is arranged above and below. In these angled iron rings, horizontally pivotable catch walls 5 are evenly distributed around the circumference of the housing and overlap each other in both pivot positions (Fig. 2 and 3) and have a drip tray 5 α protruding into the lower part 1 b at the lower end.

The lower part 1 b forms a channel 6 in which a channel 7 is mounted concentrically at a distance from the side walls and from the bottom. Both channels are provided with drainage openings 8 and 9. The inner channel 7 is located vertically below the catch walls 5 and is covered on one side by the drip plates 5 α in both pivot positions of the catch walls.

Above the catch walls, a horizontally lying adjusting ring 10 is mounted in the upper part 1 α , in which radially extending guide slots 11 are provided, into which pins 12 connected to the catch walls protrude. To pivot the catch walls, the adjusting ring is rotated around the longitudinal axis of the centrifuge by means of an adjusting lever 13, the pins 12 sliding in the guide slots 11 taking the catch walls with them and bringing them into the corresponding position.

At the beginning of the centrifuging, the catch walls are brought into the position shown on the right in Figs. If it is necessary during the centrifuging to separate the syrup that has been discharged up to now from the following one, which is caused, for example, by changing the nature or the degree of purity of the syrup, the adjusting ring is turned in the direction of the arrow α (Fig. 3). Here, the catch walls are swiveled into the position shown on the left in Fig. 2 and 3. The syrup that now hits the other side of the trap walls runs off into the inner channel 7, while the syrup still adhering to the side of the trap walls that is now facing out drips off via the drip tray into the annular channel 6 α located between the centrifuge housing and the channel 7. In this way it is ensured that the types of syrup are properly discharged separately from one another.

When extracting white sugar, the trap walls are in the position shown in Fig. 2 and 3 on the right the so-called green drain (mother syrup) is carried away, while the catch walls in the other position the excrete so-called white runoff (cover syrup). The one when switching the catch walls from green to "White" syrup splashing onto the inside of the centrifuge housing for a moment runs into the outer channel 6, which receives the "green" syrup, that is, the one of lesser purity. Through this however, the separation performance of the device is not impaired, since the white flow is only less Amount gets into the already not so pure green drain. At the end of the ejection process occurs when swiveling the catch walls back into the starting position (Fig. 2 and 3 right) no more syrup from the Sieve drum that could mix with the other process.

The invention is not limited to the illustrated embodiment. The ones provided in the adjusting ring 10 Guide slots can, for example, also be V-shaped or arcuate, if this is the case is useful for reducing friction or otherwise facilitating the pivoting of the catch walls. Instead of of the adjusting lever 13 can be any other, possibly also connected to an automatic centrifuge control Step changeover device.

Claims (3)

Patent claims: 1. Sieve centrifuge, in particular sugar centrifuge, in which the centrifuged mother and top syrup is discharged by pivoting vertical catch walls into separate annular channels, characterized in that one channel (7) is arranged at a distance in the other channel (6) and the horizontally pivotable trap walls (5) can be pivoted through 180 °, overlap in the two trap positions and on one side have a drip tray (5 a) that overlaps the inner channel on one side. 2. Sieve centrifuge according to claim 1, characterized in that the catch walls (5) at the top End with one pin (12) each in guide slots (11) running radially to the longitudinal axis of the centrifuge an adjusting ring (10) rotatable about the longitudinal axis of the centrifuge are guided. 3. Sieve centrifuge according to claims 1 and 2, characterized in that the adjusting ring (10) V-shaped or arcuate guide slots for receiving the pin (12) are provided. Documents considered: German Patent No. 930379; U.S. Patent No. 1441751. 1 sheet of drawings © aO9 679/595 11.58