Corundum mullite brick processing sintering device

Abstract

The utility model discloses corundum mullite brick processing sintering device, including sintering kiln main part, hot -blast circulation unit, air curtain subassembly and tuyere cooling assembly, hot -blast circulation unit includes air draught fan, first air filter, temperature control valve and mixing valve, and the air draught fan import is in communication with the cooling section of sintering kiln main part, the import of air draught fan is connected with first air filter, and the outlet of air draught fan has temperature control valve and mixing valve in proper order and is communicated, and the first import of temperature control valve and mixing valve is connected. In the utility model, the cooling shell is wrapped and welded on the outside of the tuyere, forming a sandwich cooling space of "shell-tuyere", the cooling medium can fully wrap the tuyere, quickly take away the heat absorbed by the tuyere, stabilize the control of the tuyere body temperature, effectively avoid the problems such as thermal fatigue, oxidation corrosion, prolong the overall life of the tuyere, reduce the production interruption loss caused by shutdown replacement.

Description

Technical Field

[0001] This utility model relates to the technical field of refractory material production and processing equipment, specifically to a corundum mullite brick processing and sintering device. Background Technology

[0002] Corundum mullite bricks, due to their high strength, high temperature resistance, and excellent chemical stability, are widely used in high-temperature industries such as metallurgy, building materials, and ceramics. Their production process relies on tunnel kiln sintering equipment to achieve continuous high-temperature sintering. As the core production equipment, the tunnel kiln needs to be isolated from the outside environment through its kiln opening to ensure a high-temperature sintering environment of 1600-1800℃ and a stable pressure field within the kiln. This ensures the sintering uniformity, bulk density, and mechanical properties of the corundum mullite bricks. Air curtain sealing, as the core sealing method at the kiln opening, works by continuously jetting air to form an air curtain barrier, blocking air exchange between the kiln and the outside environment.

[0003] The air nozzle is the terminal injection component of the air curtain airflow. It needs to be exposed to the medium and high temperature environment of the sintering kiln for a long time and must withstand the continuous scouring of the air curtain airflow after preheating. Most air nozzles are made of one-piece metal or ceramic material without built-in cooling channels. They are prone to "thermal fatigue deformation" when exposed to high temperature for a long time. This can even cause the air nozzle to soften or melt due to high temperature, requiring frequent shutdowns for replacement, which seriously affects the continuity of sintering production and increases equipment maintenance costs. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a corundum mullite brick processing and sintering device with the advantage of air nozzle cooling, thereby solving the problems mentioned in the background technology.

[0005] To achieve the aforementioned advantages of nozzle cooling, the specific technical solution adopted by this utility model is as follows: A corundum-mullite brick processing and sintering device includes a sintering kiln body, a hot air circulation unit, an air curtain assembly, and an air nozzle cooling assembly. The hot air circulation unit includes an induced draft fan, a first air filter, a temperature control valve, and a mixing valve. The inlet of the induced draft fan is connected to the cooling section of the sintering kiln body. The inlet of the induced draft fan is connected to the first air filter, and the outlet of the induced draft fan is sequentially connected to the temperature control valve and the mixing valve. The first inlets of the temperature control valve and the mixing valve are connected, the second inlet of the mixing valve is connected to the outside fresh air, and the outlet of the mixing valve is connected to the air curtain assembly. The air curtain assembly includes an air curtain main duct and an air curtain nozzle, with the air curtain nozzle being connected through one side of the air curtain main duct; The air nozzle cooling assembly includes a cooling medium source, a cooling pipe, and a cooling housing. The cooling housing is welded to the outside of the air curtain nozzle, and the side surface of the cooling housing is connected to the cooling medium source through the cooling pipe.

[0006] Furthermore, it also includes a temperature regulation unit, which is specifically a temperature sensor. The temperature sensor is located at the outlet of the air curtain nozzle and is electrically connected to the mixing valve and the temperature control valve, respectively.

[0007] Furthermore, the inner wall of the cooling shell is provided with an anti-corrosion coating, and the anti-corrosion coating is a ceramic coating.

[0008] Furthermore, the cooling medium source is specifically a cooling fan, and the cooling pipe is connected in series with a second air filter and a pressure regulating valve.

[0009] Furthermore, the outlet of the air curtain nozzle is flat and rectangular.

[0010] Furthermore, it also includes a control component, which is electrically connected to the temperature regulation unit, the cooling medium source, and the hot air circulation unit, respectively.

[0011] Compared with the prior art, this utility model provides a corundum mullite brick processing and sintering device, which has the following beneficial effects: In this invention, a cooling shell is welded to the outside of the nozzle to form a sandwiched cooling space between the shell and the nozzle. The cooling medium can completely envelop the nozzle, quickly remove the heat absorbed by the nozzle, stabilize the temperature of the nozzle body, effectively avoid problems such as thermal fatigue and oxidation corrosion, extend the overall life of the nozzle, and reduce production interruption losses caused by downtime for replacement. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of the corundum mullite brick processing and sintering device according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the connection structure of the air curtain assembly of the corundum mullite brick processing and sintering device according to an embodiment of the present utility model. Figure 3 This is a schematic diagram of the cooling shell of the corundum mullite brick processing and sintering device according to an embodiment of the present utility model.

[0014] In the picture: 1. Sintering kiln body; 2. Hot air circulation unit; 3. Air curtain assembly; 4. Air nozzle cooling assembly; 5. Exhaust fan; 6. First air filter; 7. Temperature control valve; 8. Mixing valve; 9. Temperature regulation unit; 10. Air curtain main duct; 11. Air curtain nozzle; 12. Cooling fan; 13. Second air filter; 14. Pressure regulating valve; 15. Cooling pipe; 16. Cooling shell; 17. Control assembly. Detailed Implementation

[0015] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0016] According to an embodiment of the present invention, a processing and sintering apparatus for corundum mullite bricks is provided.

[0017] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-3 As shown, the corundum mullite brick processing and sintering device according to an embodiment of the present utility model includes a sintering kiln body 1, a hot air circulation unit 2, an air curtain assembly 3, and an air nozzle cooling assembly 4. The hot air circulation unit 2 includes an induced draft fan 5, a first air filter 6, a temperature control valve 7, and a mixing valve 8. The inlet of the induced draft fan 5 is connected to the cooling section of the sintering kiln body 1. The inlet of the induced draft fan 5 is connected to the first air filter 6, and the outlet of the induced draft fan 5 is sequentially connected to the temperature control valve 7 and the mixing valve 8. The first inlet of the temperature control valve 7 and the first inlet of the mixing valve 8 are connected. The second inlet of the mixing valve 8 is connected to the outside fresh air, and the outlet of the mixing valve 8 is connected to the air curtain assembly 3. The air curtain assembly 3 includes an air curtain main pipe 10 and an air curtain nozzle 11, with the air curtain nozzle 11 being connected through one side of the air curtain main pipe 10. The air nozzle cooling assembly 4 includes a cooling medium source, a cooling pipe 15, and a cooling shell 16. The cooling shell 16 is welded to the outside of the air curtain nozzle 11, and the side surface of the cooling shell 16 is connected to the cooling medium source through the cooling pipe 15. The cooling shell 16 is welded to the outside of the air nozzle, forming a sandwich cooling space of "shell-air nozzle". The cooling medium can completely envelop the air nozzle, quickly remove the heat absorbed by the air nozzle, stabilize the temperature of the air nozzle body, effectively avoid problems such as thermal fatigue and oxidation corrosion, extend the overall life of the air nozzle, and reduce production interruption losses caused by downtime replacement.

[0018] Please refer to Figure 1-3It also includes a temperature regulation unit 9, which is specifically a temperature sensor. The temperature sensor is located at the outlet of the air curtain nozzle 11 and is electrically connected to the mixing valve 8 and the temperature control valve 7 respectively. The temperature sensor directly detects the final air curtain temperature acting in the kiln and achieves precise regulation of the air curtain temperature through dual temperature control logic.

[0019] Please refer to Figure 1-3 The inner wall of the cooling housing 16 is provided with an anti-corrosion coating, which is a ceramic coating that is resistant to high temperature and wear and does not react with cooling air, thus extending the life of the cooling housing 16.

[0020] Please refer to Figure 1-3 The cooling medium source is specifically a cooling fan 12. The cooling pipe 15 is connected in series with a second air filter 13 and a pressure regulating valve 14. The second air filter 13 and the pressure regulating valve 14 are used to filter and regulate the pressure of the cooling air.

[0021] Please refer to Figure 1-3 The outlet of the air curtain nozzle 11 is flat and rectangular, resulting in a more uniform jet of air and a wider coverage area.

[0022] Please refer to Figure 1-3 It also includes a control component 17, which is electrically connected to the temperature regulation unit 9, the cooling medium source, and the hot air circulation unit 2 respectively. The device is equipped with an independent control component 17, which is linked with the temperature regulation unit 9, the cooling medium source, and the hot air circulation unit 2 to realize an automated closed loop of "detection-judgment-regulation".

[0023] Working Principle: After the corundum mullite bricks are fired in the main body 1 of the sintering kiln, they enter the cooling section for cooling. Then, the induced draft fan 5 is started, and high-temperature waste heat airflow is drawn from the cooling section of the sintering kiln through the inlet pipe. The waste heat airflow first enters the first air filter 6 to filter impurities. The filtered clean hot airflow enters the temperature control valve to initially regulate the flow rate of the waste heat airflow. The waste heat airflow regulated by the temperature control valve 7 is finally delivered to the first inlet of the mixing valve 8, waiting to be mixed with the outside fresh air, preparing for precise temperature control of the air curtain airflow. The temperature-controlled airflow is distributed to each air curtain nozzle 11 through the air curtain main pipe 10. The nozzle outlet is designed as a flat rectangle, which can convert the airflow into a uniform and wide laminar flow, forming a complete air curtain barrier at the kiln mouth. At the same time, the cooling airflow first enters the second air filter 13 to filter dust in the air. Then, the airflow pressure is regulated by the pressure regulating valve 14. The processed cold air enters between the cooling shell 16 and the nozzle, quickly carrying away the radiant heat in the kiln and the heat conducted by the air curtain airflow absorbed by the nozzle, thereby controlling the temperature of the nozzle and extending the service life of the nozzle.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A corundum-mullite brick processing and sintering apparatus, comprising a sintering kiln body (1), a hot air circulation unit (2), an air curtain assembly (3), and an air nozzle cooling assembly (4), characterized in that, The hot air circulation unit (2) includes an induced draft fan (5), a first air filter (6), a temperature control valve (7), and a mixing valve (8). The inlet of the induced draft fan (5) is connected to the cooling section of the sintering kiln body (1). The inlet of the induced draft fan (5) is connected to the first air filter (6), and the outlet of the induced draft fan (5) is connected to the temperature control valve (7) and the mixing valve (8) in sequence. The first inlet of the temperature control valve (7) and the mixing valve (8) are connected. The second inlet of the mixing valve (8) is connected to the outside fresh air. The outlet of the mixing valve (8) is connected to the air curtain assembly (3). The air curtain assembly (3) includes an air curtain main pipe (10) and an air curtain nozzle (11), with the air curtain nozzle (11) being connected through one side of the air curtain main pipe (10). The air nozzle cooling assembly (4) includes a cooling medium source, a cooling pipe (15) and a cooling shell (16). The cooling shell (16) is welded to the outside of the air curtain nozzle (11). The side surface of the cooling shell (16) is connected to the cooling medium source through the cooling pipe (15).

2. The corundum-mullite brick processing and sintering apparatus according to claim 1, characterized in that, It also includes a temperature control unit (9), which is specifically a temperature sensor. The temperature sensor is located at the outlet of the air curtain nozzle (11) and is electrically connected to the mixing valve (8) and the temperature control valve (7).

3. The corundum-mullite brick processing and sintering apparatus according to claim 2, characterized in that, The inner wall of the cooling shell (16) is provided with an anti-corrosion coating, and the anti-corrosion coating is a ceramic coating.

4. The corundum-mullite brick processing and sintering apparatus according to claim 3, characterized in that, The cooling medium source is specifically a cooling fan (12), and the cooling pipe (15) is connected in series with a second air filter (13) and a pressure regulating valve (14).

5. The corundum-mullite brick processing and sintering apparatus according to claim 4, characterized in that, The outlet of the air curtain nozzle (11) is a flat rectangular shape.

6. The corundum-mullite brick processing and sintering apparatus according to claim 5, characterized in that, It also includes a control component (17), which is electrically connected to the temperature regulation unit (9), the cooling medium source, and the hot air circulation unit (2), respectively.

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