Roller kiln

Abstract

The utility model discloses a roller kiln which comprises a kiln body, a roller bar used for conveying materials is arranged in the kiln body, a plurality of cooling air pipes communicated with an inner cavity of the kiln body are arranged at the top of the kiln body, one end of each cooling air pipe is communicated with a fan, a gas pipe is arranged on the side face of the kiln body, and the kiln body comprises an arch-top kiln body and a flat-top kiln body. Exhaust pipes are arranged on the two sides of an inner cavity of the flat-top kiln body in a penetrating mode, the exhaust pipes are connected with the flat-top kiln body through screws, the exhaust pipes on the two sides are located above and below the roller bars respectively, and the exhaust pipes are connected with the cooling air pipes through pipelines; the utility model has the advantages that tar is convenient to remove and the sintering effect is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of roller hearth kiln manufacturing, and particularly relates to a roller hearth kiln. Background Art

[0002] A roller hearth kiln is a high-efficiency and high-output clinker production equipment, which drives the rotation of the kiln barrel through a roller drive mode. The structure of the roller hearth kiln consists of a kiln furnace and rollers. The kiln furnace is the main part of the roller hearth kiln, usually made of refractory materials. There are multiple rollers inside the kiln furnace to support and convey materials, having the advantages of large production capacity, high fuel utilization efficiency, and stable thermal performance.

[0003] In the existing kiln body structure, although a cooling air duct is provided at the top to achieve temperature control and an exhaust air duct is provided to discharge the heat inside the kiln, there are still many deficiencies. On the one hand, the cooling system of the traditional kiln body cannot effectively avoid the damage of materials due to overheating, and the cooling effect and temperature control accuracy are limited. On the other hand, the materials are prone to tar solidification due to overheating during the conveying process, resulting in short circuits and deformation of the roller rods, affecting the production efficiency. In addition, in the traditional sintering method, there is a large amount of heat loss, low energy utilization rate, and high maintenance cost for equipment such as roller rods. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a roller hearth kiln to solve the problems that tar is easily generated and solidified and adhered to the roller path during the re-sintering process of a common roller hearth kiln, resulting in short circuits and the like.

[0005] The utility model realizes the above purpose through the following technical solutions: including a kiln body, the kiln body is provided with roller rods for conveying materials, several cooling air ducts communicating with the inner cavity of the kiln body are provided at the top of the kiln body, one end of the cooling air duct is communicated with a blower, and a gas pipe is provided on the side of the kiln body.

[0006] Further, the kiln body includes an arched-top kiln body and a flat-top kiln body.

[0007] Further, exhaust air ducts are respectively provided through both sides of the inner cavity of the flat-top kiln body, the exhaust air ducts are connected to the flat-top kiln body through screws, the two exhaust air ducts on both sides are respectively located above and below the roller rods, and the exhaust air ducts are connected to the cooling air ducts through pipelines.

[0008] Further, a combustion burner is provided through one side wall of the arched-top kiln body, the combustion burner is connected to the gas pipe through a pipeline, the combustion burner is connected to the arched-top kiln body through a screw, an excess burner is provided on the side below the roller rod in the arched-top kiln body, and the excess burner is connected to an external gas pipe through a pipeline.

[0009] Furthermore, air extraction pipes are provided at the relative positions on the sides of the combustion burner and the excess burner. The air extraction pipes penetrate through the side wall of the arched-top kiln body and are connected by screws. One end of the air extraction pipe is connected to an external air extractor through a pipeline.

[0010] Furthermore, the top of the flat-top kiln body is provided with multiple layers of heat insulation boards. The multiple layers of heat insulation boards are connected through screws passing through, and the multiple layers of heat insulation boards are fixed to the flat-top kiln body through buckles.

[0011] Furthermore, a driving motor is provided at one end of the roller rod. The driving motor is connected to the roller rod through a rotating shaft, and the driving motor is connected to the outside of the kiln body through screws.

[0012] Beneficial effects: The design of the present utility model is reasonable and has the following beneficial effects:

[0013] 1. In the present practical solution, through the cooling air ducts arranged at the top and the fans connected thereto, the accuracy of temperature control inside the kiln body is effectively improved. It not only ensures the uniform heating of the materials during the sintering process, avoids material damage caused by overheating, but also significantly improves the cooling efficiency, effectively prevents the solidification of tar, reduces energy consumption, and prolongs the service life of the equipment;

[0014] 2. In the present practical solution, the design of combining the arched top and the flat top for the kiln body optimizes the heat flow dynamics, improves the heat efficiency, and further reduces heat loss. This innovation in structure not only enhances the heat insulation performance of the kiln body, but also improves the sintering quality through the optimization of heat distribution, achieving effective energy conservation;

[0015] 3. In the present practical solution, the design of the combustion burner and the excess burner on the arched-top kiln body ensures the stability and high efficiency of combustion, providing sufficient and uniform heat for the sintering process. Especially the position design of the excess burner can effectively gasify and remove the tar adhering to the roller rod, reducing the maintenance cost and prolonging the service life of the equipment;

[0016] 4. In the present practical solution, the design of the air extraction pipe further optimizes the pressure inside the kiln, improves the combustion efficiency, reduces the adhesion of tar to the roller rod, and avoids product quality and equipment operation problems caused by tar. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the arched-top kiln body of the present utility model;

[0018] Figure 2 It is a schematic structural diagram of the flat-top kiln body of the present utility model;

[0019] Figure 3 It is a schematic structural diagram of the partial A of the present utility model.

[0020] In the figure: 1 - kiln body, 2 - roller rod, 3 - cooling air duct, 4 - fan, 5 - gas pipe, 6 - exhaust air duct, 7 - combustion burner, 8 - excess burner, 9 - suction pipe;

[0021] 11 - arched top kiln body, 12 - flat top kiln body, 13 - multi - layer heat insulation board, 21 - drive motor. Specific implementation mode

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0023] Combined with Figures 1 to 3 A roller hearth kiln as shown, including a kiln body 1, in which there is a roller rod 2 for conveying materials. At the top of the kiln body 1, there are several cooling air ducts 3 communicating with the inner cavity of the kiln body 1. One end of the cooling air duct 3 is connected to a fan 4. A gas pipe 5 is provided on the side of the kiln body 1. At the top of the kiln body 1, there are several cooling air ducts 3, and the cooling air ducts 3 are connected to the fan 4, which can effectively cool the inner cavity of the kiln body 1, ensure precise temperature control during the sintering process, and prevent the materials from being damaged due to overheating. Through the coordinated work of the cooling air ducts 3 and the exhaust air ducts 6, uniform cooling of the inner cavity of the kiln body 1 is achieved, effectively preventing overheating of the materials and solidification of tar.

[0024] Among them, the kiln body 1 includes an arched top kiln body 11 and a flat top kiln body 12. The kiln body 1 adopts a design combining the arched top kiln body 11 and the flat top kiln body 12. This structure not only improves the thermal efficiency but also extends the service life of the kiln body 1.

[0025] On both sides of the inner cavity of the flat top kiln body 12, exhaust air ducts 6 are penetrated. The exhaust air ducts 6 are connected to the flat top kiln body 12 by screws. The exhaust air ducts 6 on both sides are respectively located above and below the roller rod 2. The exhaust air ducts 6 are connected to the cooling air ducts 3 through pipes. The exhaust air ducts 6 arranged on both sides of the flat top kiln body 12 are connected to the cooling air ducts 3, forming a complete cooling system, ensuring the uniformity of the temperature distribution in the kiln, and further improving the sintering quality.

[0026] In one side wall of the arched top kiln body 11, a combustion burner 7 is penetrated. The combustion burner 7 is connected to the gas pipe 5 through a pipe. The combustion burner 7 is connected to the arched top kiln body 11 by screws. An excess burner 8 is provided on the side below the roller rod 2 in the arched top kiln body 11. The excess burner 8 is connected to the external gas pipe 5 through a pipe. The design of the combustion burner 7 and the excess burner 8 in the arched top kiln body 11 ensures the stability and high efficiency of combustion, provides sufficient and stable heat for sintering, and at the same time, the excess burner 8 can burn from the bottom of the roller rod 2 to vaporize and separate the tar adhering to the roller rod 2.

[0027] Exhaust pipes 9 are provided at the side-by-side positions of the combustion burner 7 and the excess burner 8. The exhaust pipes 9 penetrate the side wall of the arched-top kiln body 11 and are connected by screws. One end of the exhaust pipe 9 is connected to an external air extractor through a pipeline. The exhaust pipes 9 provided on the sides of the combustion burner 7 and the excess burner 8 can effectively adjust the pressure inside the kiln, maintain the stability of the combustion process, improve the combustion efficiency, and at the same time can extract tar liquid gas to avoid tar adhering to the roller rod 2 and causing short circuits and deformations.

[0028] The top of the flat-top kiln body 12 is provided with multiple layers of heat insulation boards 13. The multiple layers of heat insulation boards 13 are connected through screws passing through. The multiple layers of heat insulation boards 13 and the flat-top kiln body 12 are fixed by buckles. The design of the multiple layers of heat insulation boards 13 on the top of the flat-top kiln body 12 effectively reduces heat loss, improves the heat insulation performance of the kiln body 1, and further saves energy.

[0029] One end of the roller rod 2 is provided with a driving motor 21. The driving motor 21 is connected to the roller rod 2 through a rotating shaft. The driving motor 21 is connected to the outside of the kiln body 1 by screws. The design of connecting the roller rod 2 with the driving motor 21 ensures the stable conveyance of materials inside the kiln and avoids breakage and blockage of the materials during the conveyance process.

[0030] Working principle: When the present utility model is in use, the materials to be sintered are sent onto the roller rod 2, the combustion burner 7 and the excess burner 8 are started to sinter the materials. After the materials are sintered to generate tar, the combustion burner 7 burns and gasifies most of the tar. The exhaust pipe 9 opposite the combustion burner 7 extracts the tar liquid gas. After part of the tar sinks and adheres to the roller rod 2, the excess burner 8 below the roller rod 2 burns and gasifies the tar on the roller rod 2, and then the exhaust pipe 9 opposite the excess burner 8 extracts the tar liquid gas below the roller rod 2.

[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed by the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0032] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A roller kiln, comprising a kiln body (1), wherein a roller (2) for conveying materials is arranged in the kiln body (1), characterized in that: The top of the kiln body (1) is provided with a plurality of cooling air ducts (3) connected to the inner cavity of the kiln body (1), one end of the cooling air duct (3) is connected to a fan (4), and a gas pipe (5) is provided on the side of the kiln body (1); The kiln body (1) comprises an arched top kiln body (11) and a flat top kiln body (12); A combustion burner (7) is provided through one side wall of the arched kiln body (11); the combustion burner (7) is connected to the gas pipe (5) via a pipeline; the combustion burner (7) is connected to the arched kiln body (11) via screws; an excess burner (8) is provided on the side below the roller (2) in the arched kiln body (11); the excess burner (8) is connected to the external gas pipe (5) via a pipeline.

2. A roller kiln according to claim 1, characterized in that: Exhaust pipes (6) are provided through both sides of the inner cavity of the flat-top kiln body (12); the exhaust pipes (6) are connected to the flat-top kiln body (12) by screws; the exhaust pipes (6) on both sides are respectively located above and below the roller (2); and the exhaust pipes (6) are connected to the cooling air pipe (3) by a pipeline.

3. A roller kiln according to claim 2, characterized in that: The combustion burner (7) and the excess burner (8) are both provided with exhaust pipes (9) at opposite sides thereof. The exhaust pipes (9) penetrate the side walls of the arched kiln body (11) and are connected by screws. One end of the exhaust pipes (9) is connected to an external exhaust fan by a pipeline.

4. A roller kiln according to claim 3, characterized in that: The top of the flat-top kiln body (12) is provided with a multi-layer heat insulation board (13), the multi-layer heat insulation boards (13) are connected through screws, and the multi-layer heat insulation board (13) and the flat-top kiln body (12) are fixed by buckles.

5. A roller kiln according to claim 4, characterized in that: A transmission motor (21) is provided at one end of the roller (2), the transmission motor (21) is connected to the roller (2) via a rotating shaft, and the transmission motor (21) is connected to the outer side of the kiln body (1) via screws.

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