JPH0450513B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for cooling a baked ingot, and more particularly to a baked ingot cooling device that can prevent burnout of a grate plate, which is a means for transferring the baked ingot.

Various types of baked ingots, including cement clinker, need to be cooled to a predetermined temperature after being discharged from a baking device such as a rotary kiln. For example, in the case of cement clinker, the temperature at the time it is discharged from the firing device is about 1300 to 1500°C, and this clinker is cooled to about 70°C. Several methods have been proposed for cooling the baked ingot. One of these methods is to cool the baked ingot with air while transporting it a certain distance, and then raise the temperature by exchanging heat with the baked ingot. A method is often used in which the air is used as combustion air for a sintering device.

FIG. 1 shows an example of a baked ingot cooling device. Inside the cooling device main body 1, a baked ingot transfer means called a grate plate is arranged. Reference numeral 2 indicates this great plate, which is constructed by alternately arranging a movable plate 2a that is operated back and forth by a drive device 3 and a fixed plate 2b that is fixed at a predetermined position. The baked ingot 5 discharged from the baking device 4 such as a rotary kiln is transferred toward the discharge port 6 by the relative movement. During this time, cooling air A is supplied from the lower part of the grate plate and cools the baked ingot to a predetermined temperature by passing through the baked ingot layer on the grate plate. Among the air whose temperature has been raised by heat exchange with the baked ingot, the high-temperature air is recovered to the baking device side, thereby saving energy.

In the above device, the temperature of the sintered ingots decreases sequentially from the upstream side of the sintered ingot flow, but assuming a predetermined position in the sintered ingot flow, the direction perpendicular to the sintered ingot flow, that is, the width of the device. The directional temperature distribution is not necessarily uniform. In particular, the classification effect is promoted by the air supplied from the bottom of the grate plate, and fine particles gather on both sides of the cooling device, and these fine particles cause a large pressure loss when air passes through, reducing the amount of air passing through. A phenomenon occurs in which water flows down the Great Plate while remaining at high temperatures. As a result, not only is there an imbalance in the cooling of the baked ingot, but also an accident occurs in which the grate plate in the high temperature section is burnt out.

An object of the present invention is to provide an apparatus that can eliminate the above-mentioned problems, prevent burnout of the grate plate, and uniformly cool the baked ingot.

In short, this invention connects a movable grate plate and a fixed grate plate to a support beam by a plate attachment plate, transfers the baked ingot by the relative reciprocating motion of the grate plate, and uses cooling gas supplied from an air chamber under the grate to transfer the baked ingot. In the baked ingot cooling device, a blind plate 14 is attached to the support beam 11 to form a cooling air chamber 11a, and the cooling air chamber 11
This is a burnout prevention type sintered ingot cooling device characterized in that a plurality of parent holes 15 are provided near the base of the plate mounting plate 10a to blow out cooling air toward the tip of the grate plate.

Embodiments of the present invention will be described below with reference to the drawings.

2 to 4 show a first embodiment. In the figure, reference numeral 10 indicates a movable grate plate provided with an air supply line. This movable plate is attached with bolts 13 to a plate support beam 11 attached to a movable beam 12, as shown in FIG. A blind plate 14 is attached to the lower part of the plate support beam 11, and the plate 10 attached to the upper end surface and the blind plate 14 form an airtight cooling air chamber 11a inside the support beam 11. 15 is plate 1
This is a parent hole for air injection formed on the mounting plate 10a of No. 0, and for each parent hole there is a partition wall 10b.
The air injection passages 10c each have a substantially U-shaped cross section.
is formed. (See FIG. 4) Reference numeral 10d designates an air injection hole formed along this air injection passage 10c. In FIG. 3, reference numeral 16 denotes a flexible hose that supplies cooling air A to the support beam 11 configured as described above, and is configured to be able to respond to the movement of the support beam 11. Note that the above configuration can be implemented not only for the movable plate but also for the fixed plate, and in this case, there is no need to consider the movement of the plate, so there is no need to use a flexible hose, and the configuration can be simplified.

In the apparatus constructed as described above, the rotational force of the motor 17 is transmitted to the sprocket 20 via the gearbox 18 and the chain 19, and the rotation of the sprocket 20 is converted by the crankshaft 21 into reciprocating motion. This reciprocating motion is further transmitted to the grate plate 10 via the movable beam 12 and the support beam 11, and operates the grate plate. During this time, cooling air A is force-fed from the flexible hose 16 at a pressure higher than that in the air chamber 22. The pressure-fed cooling air is injected along the air passage 10c through each parent hole 15, and is injected from each child hole 10d toward the baked ingot layer. By injecting a large amount of air in this way, the upper baked ingot is cooled, and the plate itself is also cooled to prevent burnout. In this case, the partition wall 10
b also serves as a cooling fin and enhances the cooling effect of the plate.

FIGS. 5 and 6 show a second embodiment. In this embodiment, cooling air can be supplied from the movable beam 12 side. That is, a blind plate 23 is attached to the movable beam 12, which is an I-beam, to form an air passage 12a. 25 is an opening that connects this air passage 12a and the cooling air chamber 11a of the support beam 11. Reference numeral 26 denotes a conduit for supplying the cooling air A, but instead of the above-mentioned flexible hose, rotary joints 27a and 27b are used to absorb the movement of the plate. Also code 2
Reference numeral 8 denotes a temperature detector such as a thermocouple, and the damper 30 may be adjusted by a temperature controller 29 based on the detection result of the temperature detector 28 to adjust the amount of cooling air. Note that the reference numeral 31 is a fixed plate.

By implementing this invention, cooling air can be supplied separately from other plates to the front half of the tip of the great plate, where insufficient cooling of the baked ingot and plate burnout are likely to occur, thereby preventing plate burnout. Moreover, the baked ingot can be cooled uniformly.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of a baked ingot cooling device, Fig. 2 is a cross-sectional view of a grate plate showing a first embodiment of the invention, and Fig. 3 is a perspective view of the baked ingot cooling device with the grate plate removed. Partial view, Figure 4 is the 2nd
FIG. 5 is a cross-sectional view of the great plate showing the second embodiment, and FIG. 6 is a cross-sectional view taken along the line - in FIG. 5. 1... Baked ingot cooling device main body, 5... Baked ingot, 10b
...Partition wall, 10...Great plate, 10c
... Air passage, 10d ... Child hole, 11 ... Support beam, 11a, 12a ... Cooling air chamber, 12 ... Movable beam, 15 ... Main hole, 16 ... Flexible hose, 22 ... Air chamber.

Claims (1)

[Claims] 1. A movable grate plate and a fixed grate plate are connected to a support beam by a plate attachment plate,
In a baked ingot cooling device that transports the baked ingot by the relative reciprocation of the grate plate and cools the baked ingot with cooling gas supplied from an air chamber under the grate, a blind plate 14 is attached to the support beam 11 and a cooling air chamber 11a is used. A plurality of parent holes 1 form a plurality of main holes 1 and eject cooling air from the cooling air chamber 11a toward the tip of the grate plate.
5 is provided near the base of the plate mounting plate 10a. 2. An air passage 10c that guides the cooling air ejected from the plurality of parent holes 15 to the tip of the grate plate.
2. The burnout prevention type sintered ingot cooling device according to claim 1, wherein partition walls 10b forming partition walls 10b are provided on the lower surface of the tip side of the grate plate in correspondence with each main hole.