KR200180038Y1 - Structure for enhancing heat transfer of firing zone for roller hearth kiln - Google Patents

Abstract

The present invention relates to the improvement of the structure of the firing table to improve the heat transfer effect of the roller haskiln used for the firing of ceramic products such as tiles and ceramics.

The present invention is a tunnel type in which the preheating table (2), the baking table (3) and the cooling table (4) are continuously installed, so that the movement of the charge (R) is provided at regular intervals over the entire length of the apparatus. In the roller haskiln formed by driving, a partition 10 made of high-temperature refractory is provided for each module interval of the baking table 3, wherein the partition 10 has an upper end portion supported by the support of the roller 5. It has technical characteristics in place.

In the heat transfer enhancement structure of the roller haskiln of the present invention, a bulkhead having a height up to the roller support is installed in each module of the lower roller of the firing table to increase the combustion heat residence time in the lower roller area, thereby transferring the charges passing through the firing table. It is possible to improve the firing quality by ensuring even heating over the area, and the residence time of the combustion heat generated from the burner installed in the firing table is relatively longer by the installation of the partition wall. As a result, the consumption of fuel can be reduced, as compared with a structure in which the combustion heat of the firing zone quickly exits the preheating zone and the cooling zone, thereby reducing the firing cost of the charges.

Description

Structure for enhancing heat transfer of firing zone for roller hearth kiln}

The present invention relates to a roller haskiln for quickly firing tiles or ceramics, and more specifically, to install a partition wall at module intervals below the roller mounting portion of the firing table to maintain the residence time of the heat of combustion for uniform firing of the charges. It is related to the heat transfer improvement structure of the firing zone of the roller haskiln, which can reduce the cost of fuel and fuel.

In general, in the ceramics industry for manufacturing ceramics and tiles, roller haskiln, in which the movement of plastic products in the kiln is driven by rollers, not by trucks, is widely used. The structure of the roller haskiln is shown in FIG. Looking at it as follows.

As shown, the roller haskell 1 is a tunnel structure surrounded by a wall of refractory, and consists of three regions, namely, a preheating table 2, a baking table 3, and a cooling table 4.

First, the preheating table 2 is a section between the inlet where the charge to be fired is introduced into the kiln and the boundary between the baking table 3 and the combustion gas generated in the baking table 3 in the preheating table 2. It is configured to flow in a direction opposite to the direction of the charge of the charge and to preheat the charge in the process of discharge through the flue provided near the inlet of the preheating (2). At this time, the movement of the charge is made by the driving of the rollers 5 installed at regular intervals across the width direction over the entire length of the kiln 1, such that the internal space of the kiln 1 by the roller (5) The roller is divided into an upper region and a lower region.

Next, the preheating table (2) is connected to the baking table (3), in which the plurality of burners (6) are installed in the upper region and the lower region of the roller (5) so that the charging of the charge is made do. That is, the charges passing through the baking table 4 by the driving of the roller 5 are fired by the heat of combustion of the burner 6, and then moved to the cooling table 4.

Meanwhile, in the cooling stand 4, a cooling process such as blowing cooling air into the cooling stand inside the kiln is performed to remove latent heat remaining in the fired charges. The product is discharged through the kiln outlet and the firing is completed.

On the other hand, in the conventional roller Haskell as described above, the charging of the charges is made by the combustion heat generated from the plurality of burners 6 installed in the upper region and the lower region of the baking table 3, the combustion gas of the baking table is Flowing into the tropics (2) and the cooling zone (3) is discharged to the outside of the kiln through each year, the flow of this combustion gas will greatly influence the plastic quality and energy efficiency of the charge.

The interior of the firing table 3 of the conventional roller haskiln 1 is divided into upper and lower regions by rollers 5 installed transversely to the inner region thereof as shown in the cross-sectional view shown in FIG. In particular, the lower region of the baking table 3 under the roller has a structure in which the preheating table 2 and the cooling table 4 are in communication with each other without any partition walls, so that combustion gas having the combustion heat of the baking table 3 is provided. It is pointed out that the heat transfer effect of the baking stand 3 is low by moving to the preheating stand 2 and the cooling stand 4 immediately and being discharged to the outside through each year.

In other words, in the conventional roller haskiln, the heat of combustion generated from the burner 6 installed in the baking table 3 is placed on the roller 5 and is not sufficiently heated for the charges passing through the preheating table 2 and Passing through the cooling stand (4) to the outside of the kiln will reduce the energy efficiency. In order to solve the above problems, a method of controlling the flow of combustion air by increasing the length of the firing table or by adjusting the damper installed in the year of the preheating table 2 or the cooling table 4 may be taken. This leads to another problem such as complexity of the device and inconvenience in process control.

In addition, in the conventional roller haskell, the boring plate, which is the support plate, serves to block the combustion heat generated from the burner of the baking table, so that the upper part of the roller becomes high temperature and the lower part of the stack furnace does not perform the proper heat transfer of the combustion gas. There is also a problem that the quality of the fired product is deteriorated due to the occurrence of a deviation in the temperature of the charge placed on the shelf plate discharged.

Therefore, the present invention has been devised to solve the problems pointed out in the conventional roller haskell, and the combustion heat generated from the burner is installed by installing a partition wall of high temperature refractory at a height up to the position of the roller support in the lower region of the baking table. The object of the present invention is to provide a plastic heat transfer structure of a roller haskiln, in which the heat transfer effect to the charge passing through the plastic stand is increased by causing the turbulent flow to stay longer in the space between the bulkheads.

1 is a longitudinal longitudinal cross-sectional view showing the overall structure of a typical roller hearth kiln.

Figure 2 is a longitudinal cross-sectional view showing a baking zone structure of a conventional roller hearth kiln.

Figure 3 is a longitudinal cross-sectional view showing a plastic table structure according to the present invention.

Figure 4 is a longitudinal longitudinal cross-sectional view showing the combustion air flow phenomenon in the baking table module according to the present invention.

((Description of the code for the main part of the drawing))

1. roller haskiln, 2. preheating stand

3. Plastic table 4. Cooling table

5. Roller 6. Burner

10. Bulkhead 11. Shelf

R. Charges

The above object of the present invention is a tunnel type roller haskil in which the preheating zone, the firing zone, and the cooling zone are continuously installed along the moving direction of the charge, and the roller lower region of the preheating zone and the cooling zone has no Achieve a smooth flow, and each module of the baking table is provided with a widthwise partition having a height from the bottom to the roller support to achieve a longer combustion heat generated from the burner installed in the lower region of the baking table do.

In the roller haskiln firing table structure of the present invention, the heat passing through the rollers of the baking table is sufficiently fired because the heat of combustion between the partition walls is sufficiently turbulent flow in the lower region of the roller. Is reached to achieve normal firing.

Therefore, the roller haskiln equipped with the firing table structure of the present invention can reduce the fuel cost, as well as improve the firing quality of the charges.

Details of the above object and technical configuration and the effects thereof according to the present invention will be more clearly understood by the following detailed description with reference to the drawings showing preferred embodiments of the present invention.

First, the overall structure of the roller haskiln according to the present invention is similar to the structure shown in FIG. 1 as described above, in particular, the structure of the preheating zone and the cooling zone except for the plastic zone are the same.

3 is a longitudinal cross-sectional view of a kiln showing the structure of a kiln equipped with a partition wall according to the present invention, and as shown, the kiln 3 is spaced apart from each other across both outer walls w made of refractory bricks. A partition wall 10 having a height up to the bottom of the roller 5 rotatably installed is installed at each module interval of the firing table.

In FIG. 3, the left side of the vertical center line is a space between the barrier ribs and the barrier ribs, and the right side of the center line shows the partition installation portion. The left and right sides of the vertical center line are spaced apart along the length of the kiln. It is a point.

The partition wall 10 is formed by masonry made of high temperature refractory bricks, and the installation of the partition wall makes the lower part of each module of the baking table 3 partially sealed.

Looking at the combustion heat flow process of the present invention plastic table composed of such a structure as shown in FIG.

As shown, in the firing table according to the present invention, as the lower region of the roller 5 of each module is surrounded by the partition 10, the combustion heat applied to the lower region is enclosed by the partition 10 and the roller 5 It will cause a very large turbulent flow within. Circular arc ca in the figure shows the turbulent flow of this combustion heat.

In this way, turbulent flow of combustion heat is performed in the lower region surrounded by the partition wall 10 below the roller 5, and the charge R placed on the plastic support 11 on the roller 5 is fired at a constant speed. In the process of passing through 3), the lower part of the charge is heated by the combustion heat transmitted from the lower area of the firing table, and the upper part of the charge is heated through the combustion heat generated from the burner installed in the upper area of the firing table, so that the entire heating is made evenly. As a result, all the portions of the charge R are heated to a predetermined temperature so that sufficient firing is performed.

On the other hand, the combustion heat, which is relatively long and has a turbulent flow in the lower region of the baking zone 3, is formed on the upper side of the roller 5 through a gap formed between the shelf plates 11 as a charge holder placed on the roller 5. After flowing through the upper region of the preheating zone (2) and the cooling zone (4) located on both sides of the firing table (3) is discharged to the outside of the kiln through their respective stacks.

As described above, the charged material R, which is heated to a predetermined firing temperature while passing through the firing table 3 and is sufficiently calcined, is moved to the cooling table 4 to be discharged to the outside of the kiln after removal of latent heat of firing is made. The firing operation through the roller haskiln 1 is completed.

As described above, in the firing table heat transfer improvement structure of the roller haskiln according to the present invention, each module of the baking table roller is provided with a partition having a height up to the roller support, thereby increasing the combustion heat residence time in the lower roller region. There is an advantage to improve the plastic quality by making the heating evenly over the entire area of the charge passing through.

In the present invention, as the residence time of the combustion heat generated from the burner installed in the firing table is relatively longer by the installation of the partition wall, the combustion heat of the firing table is quickly escaped by the negative pressure without the partition wall in the prior art. Compared with the structure, it is possible to reduce the consumption of fuel, thereby reducing the firing cost of the charges.

Claims (2)

In the roller-shaped kiln in which the movement of the charged material R is carried out by the drive | operation of the roller 5 as a tunnel type provided with the preheating stand 2, the baking stand 3, and the cooling stand 4 continuously, The heat transfer enhancement structure of the firing zone of the roller haskiln, characterized in that the partition wall 10 made of high temperature refractory is installed for each module interval of 3). The heat transfer enhancement structure of claim 1, wherein the partition wall (10) has an upper end thereof located on a support of the roller (5).