JPS6315759Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device for cooling baked ingots, and particularly to a device for cooling baked ingots that is effective in preventing burnout of the grate at the falling part of the baked ingots.

As one of the devices for cooling baked ingots such as cement clinker, there is a device that transports the baked ingots a certain distance by reciprocating a fire grate and cools them to a predetermined temperature with cooling air during this time. To explain the outline of this equipment using cement clinker as an example, first, in the rotary kiln which is the baking equipment,
Cement clinker calcined to ℃ falls onto the grate of the cooling device. In this case, since the rotary kiln rotates and conveys the clinker inside, the center of the fall of the clinker falling from the kiln moves in the rotational direction relative to the central axis of the kiln, causing a so-called offset. The cooling device is installed so that the center of this fall overlaps with the center of the sintered ingot transfer of the device. Further, naturally, a large amount of baked ingots is piled up on the grate at the part where the baked ingots fall. In this mountain-shaped accumulation part, the layer height of the baked ingot layer becomes high, and the ventilation resistance of cooling air in this part becomes large. For this reason, most of the cooling air passes through the low-height parts around the mountain-shaped pile, creating a blow-through, and on the other hand, the cooling of the mountain-shaped pile becomes extremely poor. For this reason, the grate in the area where the mountain-shaped pile is located will be burnt out in a short period of time.

The purpose of this invention is to provide a sintered ingot cooling device which can eliminate the above-mentioned problems and effectively prevent burnout of the grate where the chevron-shaped piles are located.

In short, this idea places an air injection box at the bottom of the grate where the chevron-shaped pile is located, and injects cooling air from this air injection box into the chevron-shaped pile at a higher air pressure than other parts of the grate. It is designed to prevent burnout.

Examples of this invention will be described below with reference to the drawings.

In Figures 1 to 3, 1 is a rotary kiln, 15 is a sintered ingot cooling device arranged for this rotary kiln 1, 2 is a burner for the rotary kiln, and 3 is a sintered ingot cooling device arranged in this sintered ingot cooling device. It's a grate. The grate consists of a fixed grate and a movable grate that reciprocates along the direction of conveyance of the baked ingots. At the bottom of the grate, air chambers 5a, 5b, 5c, and 5d divided into multiple sections are formed, and air is supplied from each air chamber to the baked ingot layer according to the temperature of the baked ingot above each air chamber. The amount of cooling air used can be adjusted. Among these, an air injection box 6 is arranged in the air chamber 5a located at the point where the baked ingot falls.
A duct 7 connects the air injection box 6 and the fan 10, and a bellows 9 is formed in a part of the duct 7 to enable movement of the air injection box 6 within the air chamber 5a. A seal damper 8 is formed at the bottom of the air injection box 6, and is configured to discharge baked ingots that have fallen into the interior of the air injection box 6. Reference numeral 11 denotes a damper provided at an outlet for discharging the baked ingots that have fallen into the air chamber 5a, and is a double damper for sealing the air chamber. 12 is a conveyor for discharging the baked ingots in each air chamber to the outside. FIG. 3 is a schematic diagram showing the arrangement of the air injection box with respect to the cooling device.

In the above apparatus, the high temperature baked ingot discharged from the rotary kiln 1 falls onto the grate 3,
A chevron-shaped pile portion 4 is formed at this falling point. An air injection box 6 is placed in an open position at the bottom of the chevron-shaped stacking section 4. Here, the offset of the falling point is determined by the diameter of the rotary kiln, the number of rotations, the head, etc., but the falling point may change due to differences depending on the properties of the material to be fired, particle size, etc. Therefore, the position of the air injection box 6 is finely adjusted so that it is located at the actual falling point. In this case, since a bellows 9 is formed on the duct 7, the injection box 6 can be easily moved. As a result, the air injection box 6
The air pressure is higher than that in other parts of the mountain
Cooling air is injected along the chevron-shaped stack forming portion to prevent burnout of the grate and to cool the chevron-shaped stack 4. Due to the reciprocating movement of the movable grate, the baked ingots on the fire grate 3 gradually move toward the discharge port 14 as shown by arrows X, whereby the chevron-shaped deposited portion 4 also disappears and is cooled to a predetermined temperature. For example, if baked ingots are used as cement clinker, at the point of fall, approximately
The temperature is between 1400℃ and 1500℃, but around the discharge port 14 it is about
It is cooled to about 100℃.

By implementing this idea, it is possible to prevent burnout of the grate even in the mountain-shaped pile of baked ingots, and the life of the device can be greatly extended.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the ingot cooling device according to this invention, FIG. 2 is a sectional view taken along the line X-A in FIG. 1, and FIG. 3 is a plan view of the grate. 3...Grate, 4...Chevron stack, 6...Air injection box.

Claims (1)

[Scope of utility model registration request] In a device in which the baked ingots that have fallen onto the grate are moved by the movement of a movable grate and cooled to a predetermined temperature with cooling air during this time, an air injection box is installed at the bottom of the grate located in the area where the mountain-shaped pile is formed. place,
A sintered ingot cooling device configured to inject cooling air from the air injection box toward the mountain-shaped stacking area at a higher air pressure than other spaces to prevent burnout of the grate.