DE7814562U1 - Mash - Google Patents

Description

Patent attorney Dipl.-Ing.

Werner Gramm patent attorney

Phs

Diply Edgar Us

SELWIG & LANGE Theodor-Heuss-Strasse 2

3300 Braunscl Telephone 05 31-8 C Telex 952 620

3300 Braunschweig, May 12, 1978 Maschinenfabrik Telephone 0531-80079

Sophienstrasse 40
3300 Braunschweig

"Kühlmaische" Anwaltsdkle 1798 DE Gm

The invention relates to a cooling mash for use in sugar production Accruing filling compound, consisting of an upright cylindrical container with a filling compound inlet on top and a filling compound outlet located below and arranged between them, with cooling devices and passage openings for the filling compound provided floors, through which a vertical agitator shaft extends centrally, the radial, the Is equipped with agitator arms sweeping over floors and acted upon by a drive.

In a known embodiment of this type are the Floors each in a horizontal plane. The passage openings in each floor are slit-shaped and arranged offset on the circumference of the floor in relation to the floor below. The floors also serve as Cooling device and are designed for this purpose as a double floor through which the cooling medium flows. The agitators consist of Profile steel. The agitator shaft is driven from above via a slip-on gear.

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7814562 08/31/78

The filling compound introduced into the standing container at the top reaches the top floor, where it is controlled by the rotating agitator arms promoted into the area of a passage slot, it falls to the next lower floor, where the process takes place repeated. The aim here is for the filling compound to cool as slowly as possible and for the sugar crystals to grow as a result. Compared to all other proposed solutions that have become known to date, this construction is considered to be optimal However, it still has the following disadvantages:

Only a relatively low heat transfer can be achieved. Another disadvantage is that the individual particles cover different distances through the container or a may have different lengths of residence time in the container. This results, among other things, from the different paths within of a floor. These differences in the passage or in the dwell time lead to different crystal sizes.

A further disadvantage is that when the cooling mash is emptied, a relatively large amount of filler mass is still transferred to the horizontally oriented one Floor floors remain, especially since the rotating agitator arms are a certain distance from the surface of the assigned floor must have.

The construction explained at the beginning is special in terms of production complex and accordingly expensive. This arises on the one hand from the need to make the hollow floors more expensive Manufacture welded construction, with the passage slots in particular requiring a large number of weld seams do.

7814562 31.G8.78

In a modified, also known execution I

form, the individual floors consist essentially of con->

centrally arranged and between them a radial i

Cooling tubes forming spacing, which go through a radial connection |

are visibly connected in series with the cooling medium. f

In this construction, too, there are essentially the ^;

same disadvantages explained above. To get from the |

s of different lengths of passage or the different |:

At least partially remedying the disadvantage that results at this time is <

in the modified embodiment, an agitator with a very I

high drive power provided. But this in turn leads to | a significant increase in the cost of the Gesai> .tanlage.

The invention is based on the object explained at the beginning
To improve cooling mash, in particular a clearly defined one
To create compulsory way for the continuous ZTüllmasse and to increase the heat transfer.

This object is achieved according to the invention by the following features:

a) The floors are cone-shaped, alternating
the cone tip is directed downwards and that of the subsequent floor is directed upwards;

b) each downwardly directed cone tip forms with the agitator shaft and the radially outer edge of each tier floor that points upward with the cone tip forms with the container wall annular passage slots for the filling compound;

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c) the cooling devices are through which a cooling medium flows Formed stirring arms, which are connected in series to the hollow agitator veslle that the Cooling medium flows in countercurrent through the agitator shaft and the agitator arms based on the flow path of the filling compound.

The filling compound fed in at the top first reaches a floor with a conical tip pointing downwards and thus inevitably slips on the funnel-shaped downward sloping walls to the one formed between the lower cone tip and the agitator shaft annular passage slot. The through this passage slot Filling compound falling vertically downwards meets the one pointing upwards until it is brought up directly to the agitator shaft Cone tip of the tier floor underneath and thus in turn inevitably slides on the outer, downward sloping cone shell in the radial direction outwards up to the. between the outer edge of this floor and the shell of the container formed annular passage slot. The filling compound is thus assigned a clearly defined compulsory path that the filling material alternately leads radially inwards and then radially outwards again.

The filling compound emerging vertically downward from the passage slots does not fall directly onto the floor below but on the cooled ones circulating between the floor edema Mixing arms, so that an improved heat transfer is achieved. By guiding the cooling medium in countercurrent, the cooling medium the highest temperature at the highest point in the container when the fresh filling compound enters. This will make the Technologically required temperature difference between the filling compound and the cooling medium in an advantageous manner when the cooling compound enters kept very low.

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Since the shelves of the new cooling mash are made of simple metal sheets can exist, there are considerable cost savings in production, especially since the agitator arms consist of simple tubes be able.

To further improve the heat transfer, the agitator arms can be equipped with sheet metal ribs.

While in the known embodiments, the agitator arms evenly have to revolve in one direction, an oscillating back and forth movement of the is sufficient in the construction according to the invention Agitator off. The drive of the agitator shaft can therefore consist of at least one working cylinder that rotates with a the agitator shaft connected radial arm engages. In this case it is a double-acting working cylinder, which can be operated hydraulically, for example. Instead, two single-acting working cylinders could also be used, which attack two diametrically opposite radial arms. An oscillating pendulum movement of around 90 degrees is sufficient. The drive required for this is at most half as expensive as the drives previously required.

Due to the inclined floors, it is possible to run empty the cooling mash completely unproblematic.

Further details and advantages of the invention emerge from the exemplary embodiment and the subclaims.

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The drawing is an exemplary embodiment of the invention shown. Show it:

Figure 1 is a longitudinal section through a cooling mash,

FIG. 2 shows a cross section along the line II-II in FIG. 1

and
FIG. 3 shows a view along the line III - III in FIG. 1.

The cooling mash shown consists of a standing cylindrical one Container 1 with filling compound inlet 2 at the top and a filling compound outlet 3 below. that the cone tip 5 is directed alternately upwards and downwards.

A vertical agitator shaft 6 extends centrally through the tier floors 4, with radial shafts that sweep over the tier floors Mixing arms 7 is equipped, which are formed by tubes. The agitator shaft 6 is hollow and has at its upper End of an inlet 8 and a return 9 for a cooling medium, e.g. water. The cooling medium flows from above vertically through the agitator shaft 6 downwards, is deflected here and on its way to the return line 9 successively passed through the agitator arms 7 of each floor connected to the agitator shaft. Included the agitator arms are connected in series. A structurally particularly simple solution is given if the agitator arms according to FIG. 2 are each formed by straight tubes welded together to form a triangle.

Each downwardly directed cone tip 5 forms an annular passage slot 10 with the agitator shaft 6. It also forms

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the radially outer edge 11 of each tier floor 4 with the cone tip 5 pointing upwards with the wall of the container 1 an annular passage slot 12.

The drive acting on the agitator shaft 6 is shown in FIG. 3 shown. It comprises hydraulic cylinders 13, which are non-rotatably attached to a Attack radial arm 14 connected to the agitator shaft.

Gr / Gr.

7814562 08/31/78

Claims (4)

Cooling mash for filling mass that occurs during sugar production, consisting of an upright cylindrical container with a filling compound inlet located at the top and a filling compound outlet located below and with cooling devices arranged in between as well as passage openings for the level floors provided with the filling compound, through which a vertical agitator shaft extends centrally, which with radial, sweeping over the floors Equipped with agitator arms and acted upon by a drive, characterized by the following features: a) The floors (4) are cone-shaped, alternating the cone tip (5) is directed downwards and that of the following floor is directed upwards; b) each downwardly directed cone tip (5) forms with the agitator shaft (6) and the circumferentially outer edge (11) each tier bottom (4) pointing upwards with the cone tip (5) forms annular passage slots with the container wall (10,12) for the filling compound; r ·) the cooling devices are provided by a cooling medium flow-through agitator arms (7) are formed, which are connected in series to the hollow agitator shaft (6), 7814562 06/31/78 that the cooling medium based on the flow path of the filling compound in countercurrent through the agitator shaft and the Mixing arms flows. 2. Cooling mash according to claim 1, characterized in that the agitator arms (7) consist of tubes. 3. Cooling mash according to claim 1 or 2, characterized in that the inlet and outlet (8, 9) of the cooling medium at the upper end the agitator shaft (6). 4. cooling mash according to one of the preceding claims, characterized in that the drive of the agitator shaft (6) consists of at least one working cylinder (13) which is attached to a radial arm (14) that is fixedly connected to the agitator shaft. attacks. Patent attorneys
Grams + lins
Gr / Gr. 7814562 08/31/78