JPH07270077A - Inclined kiln - Google Patents

Abstract

PURPOSE:To freely adjust a temperature of a kiln by a plurality of burners provided at intervals in the direction of longitudinal axis. CONSTITUTION:A mechanism is provided for swinging a main kiln body 1 inclined in the direction of a longitudinal axis rightward and leftward, or forward and backward so that a sample is rotated, rolled and moved. A heating pattern in the kiln is adjusted and controlled by a plurality of burners 2 provided at intervals in the direction of the longitudinal axis.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pellet or granular fired material such as an artificial lightweight aggregate, an artificial ordinary aggregate, an adsorbent or a filter, or a firing for continuously firing a powder such as cement. It relates to furnaces (kilns), especially inclined kilns.

[0002]

2. Description of the Related Art Conventionally, cement, artificial aggregates, filtration materials, adsorbents, etc. are mainly fired using a rotary kiln.
The reason for using such a rotary kiln is that the sample rolls as the kiln rotates, preventing uneven burning or rotating the fired product, so that the anti-fusing material enters between the fired products and causes fusion. This is because it has the effect of preventing
Another advantage of the rotary kiln is that the fired product can be moved without providing a special moving device.

Particularly, the artificial aggregate is a kind of ceramics, and a complicated temperature distribution, that is, a heat pattern must be managed during firing. For example, in the case of the artificial lightweight aggregate, the aggregate having a higher strength can be fired when the heating rate from a low temperature of about 100 ° C. is lower than the maximum temperature. On the other hand, when the temperature is lower than this temperature, the strength hardly changes even if the material is rapidly heated.

[0004]

At the same time, in the conventional rotary kiln, it is difficult to provide a plurality of burners in the long axis direction in the kiln, and therefore firing is usually performed by burning one burner. In such combustion with a single burner, it is difficult to adjust the heat pattern in the kiln no matter how the combustion method is devised. For example, if the temperature rising rate is slowed down, the moving speed of the fired product must be slowed down, so that the production amount decreases. Also, since the range of foaming temperature is narrow (depending on the combustion method and kiln size, diameter 1 m, length 15-20
In the case of a rotary kiln of m, the foaming temperature range is 1 m
Below), the production efficiency is low, which makes it difficult to efficiently produce high-quality aggregate. Therefore, inevitably, the required temperature range cannot be lengthened, so that the production amount is limited, or the heat pattern required for the fired product cannot be produced, so that high quality good fired products cannot be produced. Can be seen.

When firing using a tunnel kiln, the heat pattern can be freely adjusted, but pellets and particles cannot be used for firing because sintering and fusion occur in a high temperature range. Therefore, tunnel kilns are not used for firing cement and many artificial aggregates and adsorbents. In addition, the tunnel kiln is rarely used for burning cement, artificial aggregates, adsorbents, filter materials, etc. because it has a drawback that uneven burning occurs because the temperature becomes higher near the flame. .

Therefore, in order to solve such problems in the prior art, an object of the present invention is to rotate and roll a fired product like a rotary kiln and to move the fired product along with it. The purpose of the present invention is to provide a tilting kiln that is provided with a burner and can freely adjust and control the temperature in the kiln.

[0007]

In order to achieve the above-mentioned object, according to the present invention, an inclined kiln comprises a kiln body inclined in the long axis direction, and the kiln body is rocked left and right or front and back. It is characterized by having a mechanism for rotating, rolling, and moving the sample.

[0008]

Therefore, according to the present invention, the kiln body is alternately rotated to the left and right to be inverted and rocked by the above-mentioned means, or the hearth in the kiln body is rocked by moving up and down in the longitudinal direction. By repeating this process, the sample in the kiln body can be rotated, rolled, and moved. To prevent the fusion of the fired products and the uneven burning, and to adjust the temperature distribution in the kiln, that is, the heat pattern, by a plurality of burners provided along the long axis direction of the kiln body. Since the quality of the fired product can be controlled, and the foaming temperature region and the sintering temperature region can be lengthened, the moving speed of the fired product can be increased and the productivity can be improved. In other words, it efficiently produces high-quality artificial lightweight aggregates, artificial ordinary aggregates, adsorbents, filterants, etc., and powders such as cement, etc., based on suitable temperature distribution control of the calcined products. You can do it.

Other objects, features and advantages of the present invention will become apparent from the following detailed description in conjunction with the accompanying drawings.

[0010]

1 and 2 of the drawings, there is shown a first embodiment of a tilt kiln of the present invention, as shown.
The slanting kiln of the present invention comprises a kiln body 1 slanted in the longitudinal direction. Kiln body 1 of this inclined kiln
Is rotatably supported at an appropriate angle to the right and left, and can be repeatedly rotated to rotate the kiln body 1 to the left or right without completely rotating, that is, within 360 °. Therefore, for example, if the roller supporting the kiln body 1 is rotated by an electric motor and is periodically reversed, the kiln body 1 can be reversed and oscillated to the left and right at an arbitrary cycle. Thus, for example, it is preferable to rotate the kiln body 1 to the left and right by about 90 ° to 120 ° and invert and swing.

As described above, the kiln main body 1 repeats the reversing motion and pivots left and right to swing, whereby the fired product a charged into the kiln main body 1 rotates and rolls in the kiln main body 1. However, since the kiln body 1 is inclined in the long axis direction, the kiln body 1 moves in the kiln body 1 toward the outlet along with the rotational movement of the fired product a. Moreover, since the kiln body 1 does not rotate completely like a rotary kiln, a plurality of burners 2 can be provided at intervals along the longitudinal direction of the kiln body 1 as shown in FIG. Therefore,
In this way, a plurality of burners 2 are arranged in the longitudinal direction of the kiln body 1.
By arranging at intervals, similarly to the tunnel kiln, the temperature distribution in the kiln body 1, that is, the heat pattern can be freely adjusted for control and management.

As described above, an example of the temperature distribution in the kiln when a plurality of burners 2 are provided according to the present invention, that is, an example of a heat pattern, corresponds to the arrangement of the burners in the kiln and corresponds to the firing of the artificial aggregate. In contrast to the heat pattern of the conventional rotary kiln, it is shown in FIG.
As shown in the figure, in the heat pattern of the conventional rotary kiln, the low temperature region continues for a long time from the inlet,
In the vicinity of the outlet of the rotary kiln, the temperature rises slowly, forming a mountain-shaped high-temperature region in which the temperature rises rapidly and immediately decreases rapidly.
There is a region B requiring the control of the short heating rate in front of the above, and both regions A and B are regions of a slight length near the exit of the rotary kiln.

On the other hand, in the present invention, a low temperature region slightly higher than the temperature of the low temperature region in the conventional rotary kiln starts near the entrance of the kiln, the temperature gradually rises and rises in the middle of the kiln. The required area B'for controlling the temperature rate is started, and the temperature is maintained at a high temperature by a plurality of burners provided at intervals along the longitudinal direction of the kiln. The temperature inside the kiln can be adjusted and controlled and managed so that it lasts for a long time near the exit of the foaming temperature range A '.
And the temperature rising rate control required area B'can be maintained sufficiently long, and the fusion preventing material is introduced at the beginning of the temperature rising rate control required area B'before the sufficiently long foaming temperature area A '. By doing so, it is possible to prevent the fusion and uneven burning by attaching the anti-fusing material to the grain boundary surface of the fired product, effectively producing a high quality fired product and further improving the productivity. You can The anti-fusing material can be added from anywhere, but it is preferable to add it in a region immediately before the region B ′ where the temperature rising rate needs to be controlled.

FIG. 4 shows a second embodiment of the inclined kiln of the present invention. As shown in the drawing, the sectional shape is different from that of the kiln of the first embodiment. , The upper part is flat so that the center of gravity is placed below, and the kiln body 1 is alternately rotated left and right by a plurality of rollers 3 so as to perform a pendulum motion, and the reversing motion is performed so as to rock. It is configured to be easy. The burner 2 is provided in the center of the upper part of the kiln body 1. Therefore, since the burned material does not come to the mounting portion of the burner 2, a refractory material having a high heat insulation efficiency is provided on the upper part of the kiln body 1. Can be installed. Of course, a plurality of burners 2 are provided at intervals along the long axis direction of the kiln body 1, so that the heat pattern can be suitably adjusted and controlled and managed.

Further, FIGS. 5 and 6 show a modification of the embodiment of FIG. 4, and in the third and fourth embodiments, the rotation axis, that is, the reversal axis is from the kiln body 1. The kiln body 1 is supported by the supporting member 4 with respect to the reversing axis center at a position separated upward, and the burner 2 is provided at the center of the upper part of the kiln body 1 with the reversing axis centering. The kiln body 1 is rotated left and right to perform a pendulum motion. Also in the illustrated third and fourth embodiments, a plurality of burners 2 are provided at intervals in the longitudinal direction of the kiln body 1,
The heat pattern in the kiln body 1 can be suitably adjusted and controlled and managed.

Further, in FIG. 7, an existing rotary kiln 1 is installed.
A fifth embodiment of a tilting kiln of the present invention is shown in which a kiln body 1 of any of the above-mentioned reversible tilting kilns is connected to and combined with a. The existing rotary kiln as shown in FIG. By combining with the slant kiln of the invention, the length of the slant kiln can be appropriately adjusted and the heat pattern in the kiln body 1 can be suitably adjusted by the burner 2 to be controlled and managed. Can be effectively used.

FIG. 8 shows a sixth embodiment of the slanting kiln of the present invention. The slanting kiln comprises a kiln body 1 vertically divided into semicircular cross sections, and serves as a hearth bottom kiln member. 1'is supported by a roller 3 so as to be reversible, and the lower kiln member 1'can be swung to the left or right, that is, rotated to efficiently burn the burned material in the kiln body 1, and at the same time, the kiln can be efficiently burned. To appropriately control and manage the heat pattern in the kiln body 1 by a plurality of burners 2 provided at intervals in the longitudinal direction at the center of the upper part of the upper kiln member 1 ″ on the fixed side of the body 1. Can be done.

Further, FIG. 9 shows a seventh embodiment of the tilting kiln of the present invention.
The furnace floor 5 provided inside is divided into a plurality of parts, and the rocked product can be rotated and moved by rocking back and forth, respectively, so that a plurality of parts can be formed along the left and right side walls of the kiln body 1. The individual burners 2 are provided at intervals, one end of each hearth 5 is supported by the support member 6, and the other end is supported by the vertically moving rod 7, which causes vertical movement of the vertically moving rod 7. The hearth 5 is swung in the front-rear direction, and the heat pattern in the kiln body 1 can be appropriately adjusted and controlled and managed.

FIG. 10 shows an eighth embodiment of the inclined kiln of the present invention. In the inclined kiln, the hearth 5 in the kiln body 1 is divided into a plurality of parts, and the baffle plate 8 is provided between them. And barriers or partition plates are provided. By moving these baffle plates, barriers or partition plates up and down to open and close, the fired product rolls and rolls to move downwards and inside the kiln body 1. The aggregate can be suitably produced by appropriately firing and foaming the fired product.

Further, the rocking of the hearth in the inclined kiln of the present invention does not have to be the lateral rocking due to the reversing motion as shown in the sixth embodiment of FIG. As in the embodiment of the present invention and the eighth embodiment, rocking by vertical movement in the front-rear direction may be performed, or a combination of these rocking movements in the left-right direction and the front-back direction may cause the fired product to rotate, turn over, or move. If it is good.

[0021]

According to the slanted kiln of the present invention having the above-described structure, the kiln body is alternately pivoted by reversing left and right, or the hearth is rocked back and forth, and the kiln body is pivoted back and forth. By providing a plurality of burners along the long axis direction, the foaming temperature region and the heating rate control region can be made long, so that the heat pattern in the kiln body can be appropriately adjusted and controlled and managed. Not only is it possible to increase the production efficiency of the fired product, but it is also possible to adjust the production amount without changing the quality of the fired product, and it is possible to produce high quality aggregates. It is what is done.
Further, the present invention is not limited to artificial aggregates, but can be widely applied to other pellets such as adsorbents and filter materials, and powders such as cement.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of an inclined kiln according to the present invention, in which A, B and C are different inversion states, that is, swinging states.

FIG. 2 is a cross-sectional view of the inclined kiln of FIG. 1 in the long axis direction.

FIG. 3 is an explanatory diagram showing a temperature distribution in the kiln body in the first embodiment of FIG. 1, that is, a heat pattern corresponding to a kiln body of an inclined kiln and a burner arrangement.

FIG. 4 is a transverse sectional view showing a second embodiment of the inclined kiln of the present invention.

FIG. 5 is a transverse sectional view showing a third embodiment of the inclined kiln of the present invention.

FIG. 6 is a transverse sectional view showing a fourth embodiment of the inclined kiln of the present invention.

FIG. 7 is a transverse sectional view showing a fifth embodiment of the inclined kiln of the present invention.

FIG. 8 is a transverse cross-sectional view showing a sixth embodiment of the inclined kiln of the present invention, in which A, B and C are different inversion states, that is, swinging states.

FIG. 9 is a view showing a seventh embodiment of the inclined kiln according to the present invention, in which A is a transverse sectional view and B is a partial sectional view in the longitudinal direction.

FIG. 10 is a view showing an eighth embodiment of the inclined kiln of the present invention, A is a transverse sectional view, and B is a partial sectional view in the longitudinal direction.

[Explanation of symbols]

 1 Kiln body 1'Lower kiln member 1 "Upper kiln member 2 Burner 3 Roller 4 Support member 5 Hearth 6 Support member 7 Vertical moving member 8 Baffle plate a Burned material

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display area F27B 9/14 9/36

Claims (6)

[Claims] 1. A kiln main body tilted in the major axis direction, and the kiln main body is rocked left and right or front and back to rotate and roll a sample,
An inclined kiln having a moving mechanism. 2. The tilt according to claim 1, wherein a plurality of burners are provided at intervals along the long axis direction of the kiln body to adjust and control the temperature distribution in the kiln body. Kiln. 3. The slant kiln according to claim 1, wherein the kiln body is rotated about a major axis to be inverted. 4. The slant kiln according to claim 1, wherein the hearth of the kiln body is divided into a plurality of pieces in the longitudinal direction and each is rocked back and forth to rotate, roll, and move the sample. 5. The kiln body is provided with a plurality of baffles or barriers that can move up and down at intervals in the longitudinal direction of the hearth of the kiln body, and the sample is moved by rolling and rolling by opening and closing the baffles or barriers. The inclined kiln according to claim 1, wherein 6. The tilting kiln according to claim 1, wherein the rotary shaft center is located above the kiln body and the kiln body is rocked to move the kiln body in a pendulum motion.