JPH07332826A - Two layer cooler - Google Patents

Abstract

PURPOSE: To discharge a predetermined uniform amount of a last material in case the particle size of the last material is changed. CONSTITUTION: A last material shaft 12 is arranged to the end edge of a double layer cooler for pulling out a lower layer material, the last material shaft 12 is opening at the upper part of a baffle surface 20 by a predetermined distance and a movable discharger 22 along the baffle surface 20 is arranged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a two-layer cooler, in which at the beginning of the cooler the upper layer of hot material to be cooled is placed on top of the previously cooled lower layer. Supplied,
At the end of the cooler, the two layers are separated from each other by a separator, the material of the lower layer falls downwards as the final material and the upper layer first passes through the crusher and then cooled by the transfer device as circulating material. It is returned to the beginning of the vessel, where it serves as the lower layer.

[0002]

2. Description of the Prior Art A two-layer cooler of the general type described above is, for example, German Patent DE-C-109734.
Known from No. 6. In such a known two-layer cooler,
A drop gap is provided to draw out the material of the lower layer, and the final material falls onto the saddle surface via the drop gap. Such a saddle surface does not limit the drop gap, and the final material slides along such a saddle surface, producing two partial streams below, which stream reaches the transfer device, whereby Be transported.

[0003]

Although this type of discharge device partially promotes the free flow of the final material, it has disadvantages. That is, when the composition of the particle size of the material changes, the flow behavior of the material and the accompanying discharge amount of the material change.

It is an object of the present invention, therefore, in a two-layer cooler of the type described above to obtain a uniform, predetermined amount of final material, even if the composition of the particle size of the material varies. To do so.

[0005]

Means and Actions for Solving the Problems Such an object is achieved by the present invention. According to the present invention, a final material shaft is provided at the end of the cooler for drawing the material of the lower layer, and the lower end of the final material shaft is opened at a position above the baffle surface by a predetermined distance. A discharge device (22) movable along the baffle surface is provided.

In the two-layer cooler according to the invention, the final material cannot flow freely, but is trapped in the final material shaft above the baffle surface. The amount of final material is determined by the ejector which is movable along the baffle surface. Preferably, the stroke speed and stroke length of such an ejector are adjustable.

In a preferred embodiment of the invention, there is an area of stagnant material at the end of the cooler (preferably flat, ie at a slight slope and in a chute for supplying recirculating material to the shredder). The stagnant material region is formed and forms a separating device for separating the upper material layer and the lower material layer. Compared with the known construction in which the separating device is constituted by a mechanical cutter, the device according to the invention is characterized by no wear and a high safety against breakage.

These and other features of the invention are set forth in the following description of the embodiment illustrated in the drawings.

[0009]

The two-layer cooler is constructed as a reciprocating grid cooler, as shown schematically in FIG. 1 in its entirety, with a continuous row of plates 1, 2 which are fixed. It is arranged so that the moving objects and the moving objects alternate.

The row of plates 1 and 2 of the cooler are assembled in several groups 3, 4, 5 which are individually supplied with cooling air by fans 6 and 7 or 8, 9 respectively. .

At the beginning of the cooler, a lower layer 10 of the material to be cooled, which has already been precooled, is fed onto the lattice surface of the cooler. The upper layer 11 of hot cooled material is such a lower layer 1
Supplied over 0. The pre-cooled material to be cooled, which is the lower layer 10, is supplied via a shaft 12, which is connected to another shaft 1 by a bunker wall 13.
4, which is separated from No. 4 and passes through such another shaft 14 and is fed onto the lower layer 10 of the two-layer cooler, which is the material to be cooled, which is supplied by a rotary kiln, for example.

The final material shaft 15 is provided at the end of the cooler.
Are arranged and such shaft 15 is configured to draw out the material of the lower layer 10, which will be described in detail later with reference to FIGS. 2, 3 and 4.

A crusher or crusher 1 is provided at the end of the cooler.
6 is provided, a chute 17 is provided in front of the crusher 16, and the material of the upper layer 11 is transferred to the crusher 16 by the chute 17. Such a chute 17 is very flat (with a slight slope) on which a stagnant material region 18 is formed. Such a piled-up material region 18 constitutes a separating device, which by pressing down the material of the lower layer 10 at the end of the cooler and guiding it to the final material shaft 15. The side layer 10 and the upper layer 11 are separated from each other. At the same time, the material of the upper layer 11 slips past the accumulated material region 18 and reaches the crusher 16.

The coarse material from the upper layer 11 is crushed by a crusher 16. After passing through the crusher 16, the material of the upper layer 11 is returned to the beginning of the cooler as recirculation material (conveyor line 19), where the lower layer 11 is placed on the lattice plane of the cooler.
Supplied as.

The lower end of the final material shaft 15 is opened at a position slightly above the baffle surface 20 formed by the horizontally arranged table. The dimensions of such openings and the distance from the lower end of the final material shaft 15 are chosen to be predetermined values. That is, the value of such distance is chosen such that the bulk material cone 21a of the final material 21 emerging from the final material shaft 15 is opened on the surface of the table forming the baffle surface 20 inside the rim of the table. To be done.

The ejector 22 is movable back and forth along the baffle surface 20 in the direction of the double arrow 23. The discharge device 22 is constructed as a beam, and its stroke speed and stroke length are variable.

At the upper end of the final material shaft 15, its inlet opening is covered by a classifier 24, which is configured as a screen or grid.

The final material shaft 15 extends across the width of the cooler (see FIG. 3). Its cross section widens downward (see FIG. 2).

As shown in FIG. 2, the grid plates of the movable plate array 2 are supported by a movable frame 25, which is movable back and forth in the direction of double arrow 26, The other plate row 1 is fixed.

The last movable plate row 2 when viewed in the transport direction
The a is arranged so as to at least partially cover the upper side of the region of the classifier 24.

Portions of the movable plate row 2 are connected to channels which move with a movable frame 25 and are supplied with air by a seal which slides against it.

The final material 21 discharged to both sides beyond the front rim and the rear rim of the baffle surface 20 by the discharging device 22 is further conveyed by a device (conveying line 27) not shown. If desired, some of the material of the upper layer 11 can be mixed with the final material (conveyance line 28) after passing through the crusher 16.

The material scraped between the grids, that is, the material dropped between the grid putt and the fixed and movable plate rows 1 and 2, is transferred to the final material conveying line 27 or the recirculated material by the transfer device 29. It is transferred to the carrier line 19.

The operation of the two layer cooler of this example will be readily understood by the following description.

Lower layer 1 of the material to be cooled, which has already been cooled in advance
By 0, the grid surface of the cooler is protected from excessive thermal loading and from excessive wear by the hot material to be cooled forming the upper layer 11.

At the end of the cooler, the two layers are separated by a separating device formed by a region of stagnant material 18. Variations in the thickness of the upper and lower layers are possible by adjusting the vertical position of the separator. Thus, for example, the height of the stagnant material region 18 (and thus the lower layer 10).
Thickness of the chute 17 can be increased by decreasing the inclination of the chute 17 and conversely can be decreased by increasing the inclination. Naturally, within the scope of the invention,
Other structures are possible to affect the relative thickness of the upper and lower layers. The relative thickness of such a layer can also be influenced, for example, by raising or lowering the chute 17 (while keeping the inclination of the chute 17 constant).

The classifier 24 is located at the upper end of the final material shaft 15 and holds the relatively large lumps of material present in the lower layer 10. Such lumpy material is a classifier 24
Spontaneously crushed in the material of the lower layer above, or
It is conveyed to the accumulated material region 18 or the upper layer 11. In the latter case, it will pass through the crusher 16 again.

The bulk material cone 21a is open above the surface of the table forming the baffle surface 20 inside the rim of the table so that the final material 21 is obstructed by the baffle surface 20. Therefore, independent of the composition of the powder particle size of the final material 21-which may change during operation-the material discharge is exclusively due to the stroke speed and stroke length of the discharge device 22. Decided.

The invention has been described above using the example of a reciprocating grid cooler. However, the present invention can be preferably applied to other two-layer coolers, especially two-layer moving grid coolers.

The last movable plate row 2a of the cooler has an elongated thrust end by which the screen bar of the classifier 24 is swept completely or partly. As a result, even when large lumps of deposits enter the area of the classifier 24, at least those areas swept by the last movable plate row are kept empty during the return stroke. Such regions have dimensions large enough to allow the amount of material of the lower layer 10 to pass through.

The screen bar of the classifier 24 prevents large chunks of material from entering the final material shaft 15. In this way, an interruption between the lower end of the final material shaft 15 and the table forming the baffle surface 20 is avoided.

The ejector 22 is constructed as a beam,
It is mechanically or fluidly driven. It is preferably protected against wear by the casting elements.

The two streams of final material 21 transferred by the ejector 22 away from the baffle surface 20 are:
As shown in FIG. 1, they can be brought together to one common carrier line 27 or they can be further transported separately.

FIG. 5 shows a preferred variant of the device for discharging the recycled material (ie the material of the upper layer 11) provided on the rear side of the crusher 16.

A bar screen 30 is arranged after the crusher 16, and the size of the opening of the screen 30 is as follows.
It is set such that the material to be cooled crushed by the crusher passes through such bar screens, but relatively large unknown objects (eg broken ring of crusher 16) can be retained.

A chute 31 is connected to the bar screen 30, and the chute 31 has a main outlet 32 by which the recirculated material is delivered to a conveying device (conveying line 19 in FIG. 1). To be done. The same applies to the two bypass outlets 33 and 34. Via these two bypass outlets 33, 34, the material to be cooled from the upper layer 11 can be drawn downwards when required as the final material. Further, it is delivered according to a transport line 28 (FIG. 1) and enters the final material transport line 27.

The three outlets 32, 33, 34 are opened or closed by slide gates 35-37 as required.

The bypass outlets 33, 34 simultaneously provide an emergency route in the event of a failure of the transfer device for recirculated material.

In normal operation, the bypass outlets 33, 34
Is basically closed.

If the two slide gates 36, 37 are opened and the other slide gate 35 is closed, the cooler can be operated in one layer if desired. In such a case, the material remains in the chute 31 as shown by the material cone 38.

[0041]

According to the present invention, in the two-layer cooler,
Even if there is a change in the composition of the particle size of the material, it has the advantage that a uniform amount of the final material can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic view showing the entire two-layer cooler of the present invention.

FIG. 2 is a partial view of the essential elements of the invention located at the end of the two-layer cooler of FIG.

FIG. 3 is a plan view of the end of the cooler.

FIG. 4 is a plan view of the final material shaft, baffle surface and ejector.

FIG. 5 is a detailed view of a variant of the discharge device for recycled material.

[Explanation of symbols]

 1, 2, 2a Plate row 3, 4, 5 Plate row group 6, 7, 8, 9 Fan 10 Lower layer 11 Upper layer 12 Shaft 13 Bunker wall 14 Shaft 15 Final material shaft 16 Crusher 17 Chute 18 Stagnant Material area 19 Conveying line 20 Baffle surface 21 Final material 21a Bulk material cone 22 Discharging device 23 Discharging device moving direction 24 Classifying device 25 Frame 26 Frame moving direction 27, 28 Conveying line 29 Conveying device 30 Bar screen 31 Chute 32 Main exit 33, 34 Bypass outlet 35, 36, 37 Slide gate 38 Material cone

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Heinz Werner Ziemeya, Federal Republic of Germany, 59320 Ennigerro, Rottendorfstraße 2 (72) Inventor, Bernd Nina Bar, Federal Republic of Germany, 59227 Aalen, Ardegraber Wake 1 (72) Inventor Manfred Stroebusch Germany, 59320 Ennigerro, Gertrudenstraße 18 (72) Inventor Günter Dormiayer Germany, 49536 Linen, Meltenschene 26

Claims (1)

[Claims] 1. An upper layer (11) of hot material to be cooled at the beginning of the cooler is fed over a lower layer (10) of material which has already been precooled, and two layers at the end of the cooler are provided. The layers (10) (11) are separated from each other by a separator, the lower layer (10) is drawn downwards as the final material and the upper layer (11) is first crushed by a crusher (16). In a two-layer cooler configured to be recycled as a recycled material to the beginning of the cooler by a transfer device, wherein the final material is at the end of the cooler to draw the material of the lower layer (10) downward. A shaft (15) is provided, the lower end of the final material shaft (15) is opened at a position above the baffle surface (20) by a predetermined distance, and the discharge is movable along the baffle surface (20). A two-layer cooler, characterized in that a device (22) is provided.