EP3096101B1 - Cooling device for cooling bulk material - Google Patents

Description

The invention relates to a cooling device for cooling bulk material, which has a cooling shaft and at least one feed chute for introducing the bulk material into the cooling shaft.

Hot bulk material, such as sintered iron ore from a sintering plant, generally needs to be cooled before it can be stored in a silo and / or further processed.

It is known to use for cooling hot bulk material cooling devices of the above type (so-called shaft cooler), in which the cooling shaft of the respective cooling device is used as a heat exchanger. When cooling the bulk material, efforts are made to avoid uneven or spatially inhomogeneous cooling of the bulk material, which, however, usually does not succeed with hitherto known cooling devices.

If the bulk material has areas which have been cooled only slightly and consequently have a high temperature, these areas can damage a conveyor downstream of the cooling device and / or a silo in which the bulk material is stored. In addition, in such a case further transport and / or further processing of the bulk material may be delayed, since it is first necessary to wait until said regions of the bulk material have cooled sufficiently.

Generic cooling devices for cooling bulk material are for example from the EP 0 013 871 A1 as well as from the US 4,123,850 A known.

An object of the invention is to provide a cooling device for cooling bulk material, by means of which a uniform cooling of the bulk material can be achieved.

This object is achieved by a cooling device of the type mentioned, according to the invention, the task chute comprises a first wall and a second wall disposed opposite the first wall and the first wall is at least partially arranged at a different angle of inclination with respect to a vertical than the second wall.

Advantageous developments of the cooling device according to the invention are each the subject of dependent claims and the following description.

The invention is based on the consideration that large bulk grains, in particular bulk grains having a diameter of at least 80 mm, cool more slowly than small grains of bulk material. If the bulk material in the cooling shaft has areas in which a concentration of large bulk grains is above average, the bulk material cools more slowly in these areas than in areas with average or below average high concentration of large bulk grains. Thus, the bulk material can cool evenly in the cooling shaft, it is thus advantageous if the bulk grains are spatially distributed homogeneously in terms of their size (or their diameter) in the cooling shaft.

Furthermore, the invention is based on the consideration that when the bulk grains are spatially homogeneously distributed through the feed chute into the cooling shaft, segregation of the bulk material grains can be reduced or avoided, at least under the feed chute.

Furthermore, the invention is based on the finding that the fact that the first wall is arranged at least in sections at a different angle of inclination with respect to a vertical than the second wall, the bulk grains are guided spatially homogeneously through the task chute and Consequently, they are also introduced into the cooling shaft in a spatially homogeneous manner. Said embodiment of the task chute thus allows a uniform cooling of the bulk material.

The bulk material may, for example, be sintered iron ore, also called sinter. That is, the cooling device may be a so-called sintered cooler.

Preferably, the second wall comprises a single, especially planar wall section. In principle, however, it is possible that the second wall has a plurality of wall sections. In the latter case, the individual wall sections of the second wall may be formed using, for example, a forming process. Alternatively, in the case of a plurality of wall sections, the second wall may have a plurality of interconnected wall plates which form the individual wall sections.

Furthermore, in the case that the second wall has a plurality of wall sections, the first wall may be arranged at least in sections at a different angle of inclination with respect to a vertical than one of the wall sections of the second wall. Furthermore, in the case that the second wall has a plurality of wall sections, the first wall may be arranged at least in sections at a different angle of inclination with respect to a vertical than a plurality, in particular all, of the wall sections of the second wall.

Preferably, the task chute is at least partially arranged in the cooling shaft, in particular in an upper region of the cooling shaft.

Further, it is preferred if a distance which the two walls have relative to one another decreases towards the top.

According to a preferred embodiment of the invention, the first wall is arranged at an angle of inclination between 27 ° and 47 ° with respect to a vertical. In this case, the first wall expediently has a single, in particular just configured, wall section. It is particularly advantageous if the first wall is arranged at an angle of inclination between 34 ° and 40 °, in particular at an angle of inclination of 37 °, with respect to a vertical. Further, it is expedient if the second wall is arranged at an angle of inclination between 7 ° and 27 ° with respect to a vertical. It is particularly advantageous if the second wall is arranged at an angle of inclination between 14 ° and 20 °, in particular at an inclination angle of 16.5 °, with respect to a vertical. With such an arrangement or configuration of the two walls, a segregation of the bulk grains can be reduced particularly well.

In another preferred embodiment of the invention, the second wall is arranged at an angle of inclination between 35 ° and 55 ° with respect to a vertical. It is particularly advantageous if the second wall is arranged at an angle of inclination between 42 ° and 48 °, in particular at an angle of inclination of 45 °, with respect to a vertical. Furthermore, it is expedient if the first wall has a first and a second wall section. The first wall section of the first wall can in particular be a lower wall section, whereas the second wall section of the first wall can be an upper wall section. Preferably, the first wall portion of the first wall is disposed at an inclination angle between 35 ° and 55 ° with respect to a vertical. It is particularly advantageous if the first wall section of the first wall is arranged at an angle of inclination between 42 ° and 48 °, in particular at an angle of inclination of 45 °, with respect to a vertical. It is further preferred if the second wall section of the first wall is arranged at an angle of inclination between 5 ° and 25 ° with respect to a vertical. It is particularly advantageous if the second wall section the first wall is disposed at an inclination angle between 8 ° and 14 °, in particular at an inclination angle of 11 °, with respect to a vertical. With such an arrangement or configuration of the two walls, a segregation of the bulk grains can be reduced particularly well.

In the case that the first wall has a plurality of wall sections, the individual wall sections of the first wall can be formed using, for example, a forming method. Alternatively, the first wall may have a plurality of interconnected wall panels forming the individual wall sections.

Furthermore, it is preferred if the first wall section of the first wall is arranged at least substantially at the same angle of inclination with respect to a vertical as the second wall. That is, the first wall portion of the first wall may be arranged parallel or substantially parallel to the second wall.

It makes sense that the task chute comprises at least two further walls. Conveniently, the two further walls are arranged opposite one another. In addition, it is expedient if the two further walls are respectively connected to the first and / or the second wall.

Furthermore, the two further walls can be arranged parallel to one another. In particular, the two further walls can be arranged vertically.

In an alternative embodiment of the invention, the two further walls can be arranged obliquely to each other. In the latter case, a distance which the two further walls have relative to one another decreases, preferably downwards. Furthermore, it is preferred if the two further walls are at least substantially at the same angle of inclination are arranged with respect to a vertical, for example at an angle of inclination of 15 °.

The task chute expediently has a bulk material outlet. The bulk material outlet may comprise at least two strips. Preferably, the strips are aligned horizontally. In addition, it is expedient if the strips are placed on different walls, in particular on mutually oppositely arranged walls. Furthermore, the strips may in each case be a bent section, in particular a section bent at a right angle, of the respective further wall. In addition, the strips can be arranged at different heights.

Appropriately, forms on the strips each a bulk pad. These bulk pads preferably serve to divert at least a portion of the bulk material as it exits the feed chute, particularly to prevent divergent leakage of the bulk material from the chute. In addition, the bulk pads can reduce wear or material removal of the task chute.

Furthermore, the feed chute may have a rectangular cross-sectional shape, in particular in a horizontal cross-section. Moreover, it is advantageous if the feed chute has a longitudinal extent in the horizontal cross section which corresponds to 40% to 90% of an inner radius of the cooling shaft.

Conveniently, the task chute is rotatably mounted. The task chute can therefore be a so-called rotary chute. Furthermore, the cooling device expediently comprises a drive unit for driving or rotating the feed chute. By a rotation of the feed chute, in particular at a constant rotational frequency, a radially symmetrical bulk material surface or a radially symmetrical bed height of the bulk material can be achieved in the cooling shaft. This in turn is advantageous for a uniform cooling of the bulk material.

Furthermore, it is expedient if the cooling shaft is at least partially axially symmetrical. The cooling shaft preferably comprises a hollow cylindrical shaft section. Conveniently, a cylinder axis of the hollow cylindrical shaft section is vertically aligned.

In an advantageous embodiment of the invention, the task chute is rotatably mounted about the cylinder axis. Furthermore, the cylinder axis can be arranged outside the task chute. In other words, the feed chute may be arranged such that the cylinder axis does not pass through the feed chute. Alternatively, the cylinder axis may be located within the feed chute. That is, the feed chute may alternatively be arranged such that the cylinder axis passes through the feed chute.

In addition, the cooling device may comprise a supply bunker. Conveniently, the task chute is connected to the supply bunker, in particular connected on the input side.

Preferably, the cooling shaft is an air-cooled heat exchanger. Conveniently, the cooling device comprises at least one fan, in particular a fan, for blowing cooling air into the cooling shaft. Furthermore, the cooling device may have at least one pump for sucking cooling air from the cooling shaft.

The cooling shaft can be designed in particular as a so-called countercurrent heat exchanger. That is, the cooling air can flow through the cooling shaft counter to a transport direction along which the bulk material is transported in the cooling shaft. This makes it possible to dissipate more thermal energy from the bulk material to the cooling air than, for example, in a so-called cross-flow heat exchanger. In this way, a higher cooling air temperature can be achieved, which in turn For subsequent processes, which use the heated as it flows through the cooling duct cooling air as a heat source, more thermal energy can be provided. It makes sense to transport the bulk material from top to bottom in the cooling shaft (due to gravity). Accordingly, the cooling air preferably flows through the cooling shaft from bottom to top.

The heated cooling air can be used for example as a heat source for a sintering plant. By supplying the heated cooling air to the sintering plant, it is also possible to prevent waste heat from the cooling process from being released into the environment.

According to an advantageous embodiment of the invention, the cooling device comprises a crushing machine for crushing bulk grains. The crushing of the bulk grains may in particular comprise a breakage of the bulk grains. The crusher is expediently arranged on the input side, in particular above, the feed chute. It is particularly preferred if the comminution machine is designed as a jaw crusher. The crushing machine can also be arranged on the input side of the aforementioned bunker, in particular above the bunker.

Since large bulk grains cool more slowly than small bulk grains, by crushing the bulk grains it can be achieved that the bulk grains are cooled down to a lower temperature and at the same time more thermal energy is dissipated by the bulk grains to the cooling air. Due to the greater cooling of the crushed bulk grains (with unchanged residence time in the cooling shaft) can also be prevented that a conveyor to which the bulk material is discharged, is damaged in the event of breakage of the bulk grains.

Further, the cooling device may comprise a sieve. It makes sense for the sieve to be arranged on the input side of the comminution machine, in particular above the comminution machine. The sieve may e.g. be designed as a bar grate.

Moreover, it makes sense if the cooling device comprises a conveyor belt, in particular a plate belt, for conveying the bulk material to the feed chute. Furthermore, it can be provided that the bulk material is fed from the conveyor belt via the crushing machine and / or the hopper bunker to the task chute.

Furthermore, it can be provided that the cooling device comprises at least one discharge device for discharging the bulk material from the cooling shaft. It makes sense for the discharge device to be located below the cooling shaft, in particular directly below the cooling shaft.

Furthermore, the cooling device can have a plurality of charging chutes, in particular a plurality of charging chutes of the type described above. The task chutes can be configured identically to one another. Furthermore, the task chutes can be arranged at the same height. In addition, the task chutes can be arranged equidistant from one another and / or radially uniformly. Furthermore, the feed chutes may be at different radii, i. be arranged at different distances to the cylinder axis. In addition, the task chutes can be connected to each other at least in sections, in particular to be connected to one another on the input side.

The previously given description of advantageous embodiments of the invention contains numerous features, which are given in the individual subclaims partially summarized in several. However, these features may conveniently be considered individually and combined into meaningful further combinations. In particular, these features are each individually and in any suitable Combination combined with the cooling device according to the invention. Furthermore, process features, formulated objectively, can also be seen as a property of the corresponding device unit and vice versa.

Although some terms are used in the specification or claims in the singular or in conjunction with a number word, the scope of the invention for these terms should not be limited to the singular or the respective number word. Further, the words "a" and "an" are not to be understood as number words but as indefinite articles.

The above-described characteristics, features, and advantages of the invention, as well as the manner in which they will be achieved, will become clearer and more clearly understood in connection with the following description of the embodiments of the invention, which will be described in connection with the drawings. The embodiments serve to illustrate the invention and do not limit the invention to the combinations of features specified therein, not even with respect to functional features. In addition, suitable features of each embodiment may also be explicitly considered isolated, removed from one embodiment, incorporated into another embodiment to supplement it, and combined with any of the claims.

FIG 1

einen Längsschnitt einer Kühlvorrichtung zum Kühlen von Schüttgut, welche unter anderem einen Kühlschacht und eine Aufgabeschurre aufweist;

FIG 2

einen vergrößerten Teilbereich aus FIG 1, in welchem die Aufgabeschurre abgebildet ist;

FIG 3

einen anderen Längsschnitt der Kühlvorrichtung aus FIG 1 aus einer anderen Perspektive;

FIG 4

einen vergrößerten Teilbereich aus FIG 3, in welchem die Aufgabeschurre abgebildet ist;

FIG 5

einen Querschnitt durch den Kühlschacht der Kühlvorrichtung;

FIG 6

einen Längsschnitt einer weiteren Kühlvorrichtung zum Kühlen von Schüttgut, welche unter anderem einen Kühlschacht und eine alternative Aufgabeschurre aufweist;

FIG 7

einen vergrößerten Teilbereich aus FIG 6, in welchem die alternative Aufgabeschurre abgebildet ist; und

FIG 8

einen Teilbereich eines anderen Längsschnitts der weiteren Kühlvorrichtung aus FIG 6 aus einer anderen Perspektive.

Show it:

FIG. 1

a longitudinal section of a cooling device for cooling bulk material, which has inter alia a cooling shaft and a task chute;

FIG. 2

an enlarged portion of FIG. 1 in which the task chute is depicted;

FIG. 3

another longitudinal section of the cooling device FIG. 1 from another perspective;

FIG. 4

an enlarged portion of FIG. 3 in which the task chute is depicted;

FIG. 5

a cross section through the cooling shaft of the cooling device;

FIG. 6

a longitudinal section of another cooling device for cooling bulk material, which has, inter alia, a cooling shaft and an alternative Aufgabeschurre;

FIG. 7

an enlarged portion of FIG. 6 in which the alternative task chute is depicted; and

FIG. 8

a partial region of another longitudinal section of the further cooling device FIG. 6 from a different perspective.

FIG. 1 shows a longitudinal section of an air-cooled cooling device 2 for cooling bulk material 4. The bulk material 4 consists of a plurality of bulk grains. In the present embodiment, the bulk material 4 is sintered iron ore, also called sinter. That is, the cooling device 2 is a so-called sinter cooler.

The cooling device 2 comprises inter alia a building 6 and a cooling shaft 8, which rests on the building 6. The cooling shaft 8 in turn comprises a hollow cylindrical shaft section 10 with a vertically oriented cylinder axis 12 and is designed as a countercurrent heat exchanger.

Furthermore, the cooling device 2 comprises a feed chute 14 for introducing the bulk material 4 into the cooling shaft 8, which in FIG an upper portion of the cooling shaft 8 is arranged. The task chute 14 is rotatably mounted about the cylinder axis 12, wherein the cylinder axis 12 is disposed outside of the feed chute 14 and does not pass through the Aufgabeschurre 14.

Furthermore, the cooling device 2 comprises a supply bunker 16, with which the feed chute 14 is connected on the input side. In addition, the cooling device 2 has a crushing machine 18 arranged above the feed bunker 16 for crushing or breaking bulk material grains, which is designed as a jaw crusher.

The cooling device 2 also comprises a discharge device 20 for discharging the bulk material 4 from the cooling shaft 8, which is arranged below the cooling shaft 8.

In addition, the cooling device 2 is equipped with a fan 22 for blowing cooling air into the cooling shaft 8. The fan 22 has a cooling air outlet 24, which opens into a chamber 26 of the building 6, in which the discharge device 20 and a lower portion of the cooling shaft 8 are arranged.

Next are in FIG. 1 a vertically aligned, parallel to the cylinder axis 12 cutting plane III-III, to which FIG. 3 as well as a horizontally oriented cutting plane VV, on which FIG. 5 refers, shown. In addition, in FIG. 1 a partial area 28 of the cooling device 2 indicated by a dash-dotted rectangle, to which the following figure refers.

FIG. 2 shows the portion 28 from FIG. 1 in an enlarged view. The pictured portion of the cooling device 2 shows the task chute 14, the hopper bunker 16 and a part of the cooling shaft 8, in particular a part of the hollow cylindrical configured shaft portion 10th

Out FIG. 2 It can be seen that the feed chute 14 has a first wall 30 and a second wall 32 arranged opposite the first wall 30, wherein the two walls 30, 32 are arranged at different angles of inclination 34 with respect to a vertical 36. The first wall 30 is disposed at an angle of 37 ° with respect to a vertical 36. Whereas the second wall 32 is arranged at an angle of 16.5 ° with respect to a vertical 36.

FIG. 3 shows a longitudinal section of the cooling device 2 along the cutting plane III-III FIG. 1 ,

In perspective FIG. 3 it can be seen that the cooling device 2 in addition to the elements described above, a conveyor belt 38, in particular a plate belt, for conveying the bulk material 4 to the feed chute 14 has.

In addition, in FIG. 3 indicated by a dash-dotted rectangle, a portion 40 of the cooling device 2, to which the following figure refers.

FIG. 4 shows the portion 40 from FIG. 3 in an enlarged view. The pictured portion of the cooling device 2 shows the task chute 14 and a part of the hopper bunker 16.

Out FIG. 4 It can be seen that the feed chute 14 comprises two further walls 42 which are arranged vertically and parallel to each other, wherein the two further walls 42 are arranged opposite one another and are connected to the two first-mentioned walls 30, 32.

It is also in FIG. 4 recognizable that the task chute 14 has a bulk material outlet 44 with two horizontal strips 46. During operation of the cooling device 2, a bulk material cushion 48 is formed on each of the two strips 46. The bulk pads 48 direct a portion of the feed chute 14 emerging bulk material on exit from the task chute 14 and also reduces wear of Aufgabeschurre 14th

One of the two strips 46 is arranged on one of the two further walls 42, while the other of the two strips 46 is arranged on the other of the two further walls 42. Furthermore, the strips 46 are arranged at different heights.

The hot bulk material 4 is conveyed to the feed chute 14 by means of the conveyor belt 38 from a sintering plant, not shown in FIG. Before the bulk material 4 reaches the feed chute 14, the bulk material grains are comminuted by means of the comminution machine 18.

The crushed bulk material 4 is guided into the hopper bunker 16, from where the bulk material 4 enters the feed chute 14. By the task chute 14, which rotates at a constant rotational frequency about the cylinder axis 12, the bulk material 4 is introduced into the cooling shaft 8.

Due to the shape of the feed chute 14, the bulk material grains (in terms of their grain diameter) are spatially homogeneously distributed in the cooling shaft 8. In addition, a flat bulk material surface in the cooling shaft 8 is achieved by the rotation of the feed chute 14.

By means of the fan 22 cooling air is blown into the aforementioned chamber 26 of the building 6. The cooling air flows through the discharge device 20 into the cooling shaft 8 and flows through the cooling shaft 8 from bottom to top. The cooling air absorbs thermal energy from the bulk material 4, so that the cooling air is heated and at the same time the bulk material 4 is cooled.

By means of the discharge device 20, the cooled bulk material 4 is discharged in batches (in portions) from the cooling shaft 8.

Further, the heated cooling air is sucked out of the cooling shaft 8 in an upper region of the cooling shaft 8 by means of pumps, not shown in the figures, and fed to the sintering plant as a heat source.

FIG. 5 shows a cross section through the cooling shaft 8, in particular through the hollow cylindrical designed shaft portion 10, along the cutting plane VV FIG. 1 , The illustrated cross section is therefore a horizontal cross section through the cooling shaft 8.

Out FIG. 5 It can be seen that the feed chute 14 has a rectangular cross-sectional shape. To illustrate how the feed chute 14 rotates in the cooling chute 8 is shown in FIG FIG. 5 on the one hand, a direction of rotation 50 of the task chute 14 shown and on the other hand, the task chute 14 is shown in three different, temporally successive positions.

The description of the following embodiment is limited essentially to the differences from the preceding, in connection with 1 to FIG. 5 described embodiment, to which reference is made with respect to the same features and functions. Substantially identical or mutually corresponding elements are in principle designated by the same reference numerals, and features not mentioned are adopted in the following exemplary embodiment without being described again.

FIG. 6 shows a longitudinal section of another air-cooled cooling device 2 for cooling bulk material 4. The present cooling device 2 has an alternative Aufgabeschurre 14 on. In addition, the further cooling device 2 has a Cooling shaft 8 with a cylindrically shaped shaft section 10.

The task chute 14 of the further cooling device 2 is mounted rotatably about the cylinder axis 12 of the cylindrically configured shaft section 10. However, the cylinder axis 12 is disposed within the task chute 14 in the present embodiment. That is, the cylinder axis 12 passes through the feed chute 14.

It is also in FIG. 6 indicated by a dash-dotted rectangle a portion 52 of the cooling device 2, to which the following figure refers.

FIG. 7 shows the in FIG. 6 indicated portion 52 in an enlarged view.

Out FIG. 7 it can be seen that the feed chute 14 of the further cooling device 2 comprises a first wall 30 and a second wall 32. These two walls 30, 32 are arranged opposite one another.

Furthermore, the first wall 30 has a first, lower wall portion 54 and a second, upper wall portion 56, wherein the first wall portion 54 is disposed at an inclination angle of 45 ° with respect to a vertical 36 and the second wall portion 56 at an inclination angle of 11 ° with respect to a vertical 36 is arranged. Further, the second wall 32 is disposed at an inclination angle of 45 ° with respect to a vertical 36. Consequently, the first wall portion 54 of the first wall 30 is arranged at the same angle of inclination 34 with respect to a vertical 36 as the second wall 32. That is, the second wall 32 and the first wall portion 54 of the first wall 30 are arranged parallel to each other.

Furthermore, in the present embodiment, by the rotation of the feed chute 14, instead of a plane Bulk material surface, reaches a bulk material surface, which (in the longitudinal section shown) is M-shaped.

In addition, in FIG. 7 a vertically aligned, parallel to the cylinder axis 12 cutting plane VIII-VIII shown, to which the following figure refers.

FIG. 8 shows a longitudinal section of the further cooling device 2 along the cutting plane VIII-VIII FIG. 7 ,

In FIG. 8 It can be seen that the feed chute 14 of the further cooling device 2 has two further walls 42. The further walls 42 are arranged obliquely to each other, with their distance from each other decreases towards the bottom. In addition, the two further walls 42 at the same angle of inclination 34, namely at an inclination angle of 15 °, with respect to a vertical 36 are arranged.

Unlike in the previous embodiment, the task chute 14 of the further cooling device 2 on a bulk material outlet 44 without strips. In principle, such would be (as in connection with FIG. 4 described) bars also at the bulk material outlet 44 of the further cooling device 2 conceivable.

Although the invention has been further illustrated and described in detail by the preferred embodiments, the invention is not limited by the disclosed example, and other variations can be derived therefrom without departing from the scope of the invention as defined in claims 1-14.

LIST OF REFERENCE NUMBERS

2

cooler

4

bulk

6

building

8th

cooling shaft

10

chute section

12

cylinder axis

14

chute

16

collecting hopper

18

crusher

20

discharge

22

Fan

24

Cooling air outlet

26

chamber

28

subregion

30

wall

32

wall

34

tilt angle

36

vertical

38

conveyor belt

40

subregion

42

wall

44

bulk material outlet

46

strip

48

bulk pad

50

direction of rotation

52

subregion

54

wall section

56

wall section

Claims (14)

1. Cooling device (2) for cooling bulk material (4), which has a cooling shaft (8) and at least one supply chute (14) for introducing the bulk material (4) into the cooling shaft (8), characterized in that the supply chute (14) comprises a first wall (30) and a second wall (32) arranged opposite the first wall (30), and the first wall (30) is arranged at least partially at a different inclination angle (34) with respect to a vertical (36) than the second wall (32), and the supply chute (14) is mounted in a rotatable manner.
2. Cooling device (2) according to Claim 1,
   characterized in that the first wall (30) is arranged at an inclination angle (34) of between 27° and 47° with respect to a vertical (36) and the second wall (32) is arranged at an inclination angle (34) of between 7° and 27° with respect to a vertical (36).
3. Cooling device (2) according to Claim 1,
   characterized in that the second wall (32) is arranged at an inclination angle (34) of between 35° and 55° with respect to a vertical (36) and the first wall (30) has a first, lower wall portion (54) and a second, upper wall portion (56), wherein the first wall portion (54) is arranged at an inclination angle (34) of between 35° and 55° with respect to a vertical (36) and the second wall portion (56) is arranged at an inclination angle (34) of between 5° and 25° with respect to a vertical (36) .
4. Cooling device (2) according to Claim 3, characterized in that the first wall portion (54) of the first wall (30) is arranged at the same inclination angle (34) with respect to a vertical (36) as the second wall (32).
5. Cooling device (2) according to one of the preceding claims,
   characterized in that the supply chute (14) comprises at least two further walls (42) which are arranged opposite one another and are each connected to the first and the second wall (42).
6. Cooling device (2) according to Claim 5,
   characterized in that the two further walls (42) are arranged parallel to one another.
7. Cooling device (2) according to Claim 5,
   characterized in that the two further walls (42) are arranged obliquely with respect to one another, wherein a distance between the two further walls (42) decreases in a downward direction and the two further walls (42) are arranged at the same inclination angle (34) with respect to a vertical (36).
8. Cooling device (2) according to one of the preceding claims,
   characterized in that the supply chute (14) has a bulk-material outlet (44) having at least two horizontally arranged ledges (46) .
9. Cooling device (2) according to one of the preceding claims,
   characterized in that the supply chute (14) has a rectangular cross-sectional shape in a horizontal cross section.
10. Cooling device (2) according to one of the preceding claims,
    characterized in that the cooling shaft (8) comprises a shaft portion (10), configured in a hollow-cylindrical manner, with a vertically oriented cylinder axis (12) about which the supply chute (14) is mounted in a rotatable manner.
11. Cooling device (2) according to one of the preceding claims,
    characterized by a collecting hopper (16) to which the supply chute (14) is connected on the input side.
12. Cooling device (2) according to one of the preceding claims,
    characterized by at least one fan (22) for blowing cooling air into the cooling shaft (8).
13. Cooling device (2) according to one of the preceding claims,
    characterized by a comminuting machine (18), arranged on the input side of the supply chute (14), for comminuting bulk material grains, wherein the comminuting machine (18) is configured as a jaw crusher.
14. Cooling device (2) according to one of the preceding claims,
    characterized by at least one output device (20) for discharging the bulk material (4) from the cooling shaft (8), said output device (20) being arranged beneath the cooling shaft (8).

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