Circulating waste heat recovery device for ceramic tile electric kiln

Abstract

The circulating type waste heat recovery device comprises a kiln body, an exhaust fan is installed on the upper surface of the kiln body, the input end of the exhaust fan fixedly communicates with an exhaust pipe, the input end of the exhaust pipe extends into the kiln body, the output end of the exhaust fan fixedly communicates with a gas conveying pipe, and the gas conveying pipe extends into the kiln body. The output end of the air conveying pipe extends into the kiln body, an air guide frame is installed on the inner top wall of the kiln body, two rotating shafts are jointly and rotationally connected to the air guide frame, and a motor is installed on the back face of the air guide frame. Through cooperation of the air guide frame, the motor, the rotating shaft and the fan plates, heat can be gathered through the air guide frame, when the motor works, the rotating shaft can drive the fan plates to rotate oppositely, the fan plates can blow hot air downwards, the hot air can be discharged to the preheating section along the air guide frame, and the situation that the hot air deviates from the direction due to interference of the hot air can be prevented; and the heat recycling effect is ensured.

Description

Technical Field

[0001] This application relates to the field of waste heat recovery technology, and in particular to a circulating waste heat recovery device for electric kilns for ceramic bricks. Background Technology

[0002] In the ceramic production process, electric kilns are the main firing equipment, and they usually use high-temperature electric heating to fire ceramic raw materials. In this process, in order to improve energy efficiency and reduce energy waste, most ceramic factories will recover and utilize waste heat, converting waste heat into reusable energy for kiln preheating or heating other production stages.

[0003] Application No. 202422450097.8 discloses a circulating waste heat recovery device for an electric kiln for ceramic bricks, relating to the field of ceramic brick production technology. The device includes a kiln body with multiple conveying rollers spaced apart on it for transporting ceramic blanks. These rollers rotate longitudinally and horizontally within a preheating section, a sintering section, and a cooling section. A heat exchange tube is spirally wound around the outside of the cooling section. The input end of the heat exchange tube is connected to a fan, and the output end extends to a gas flow circulation and stirring section. The lower part of the gas flow circulation and stirring section extends into the preheating section, enabling the hot airflow to be evenly distributed within it. This invention provides a circulating waste heat recovery device for an electric kiln for ceramic bricks. The heat exchange tube is spirally wound around the cooling section to exchange waste heat. The fan transports the hot airflow to the gas flow circulation and stirring section, ensuring that the heat is fully utilized within the preheating section of the kiln, thereby achieving a uniform heat distribution within the preheating section and transferring it to the brick blanks.

[0004] The above-mentioned solution has shortcomings in use. When the airflow circulation stirring part rotates, due to its high-speed rotation, the hot air branch pipe will cause disturbance and turbulence in the surrounding airflow. This will lead to uneven airflow distribution. The hot air that should be discharged through the air hole may deviate from the predetermined path due to the interference of the airflow and cannot be effectively blown to the preheating section in the kiln, which will affect the heat circulation and recovery effect. To solve the above problems, we propose a circulating waste heat recovery device for electric kilns for ceramic bricks. Utility Model Content

[0005] The purpose of this application is to provide a circulating waste heat recovery device for electric kilns for ceramic bricks, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A circulating waste heat recovery device for an electric ceramic brick kiln includes a kiln body. An exhaust fan is installed on the upper surface of the kiln body. The input end of the exhaust fan is fixedly connected to an exhaust pipe, which extends into the interior of the kiln body. The output end of the exhaust fan is fixedly connected to an exhaust pipe, which extends into the interior of the kiln body. An air guide frame is installed on the inner top wall of the kiln body. Two rotating shafts are rotatably connected to the air guide frame. A motor is installed on the back of the air guide frame. The output end of the motor is connected to one end of one of the rotating shafts. The other end of each rotating shaft passes through the air guide frame and is fixedly connected to a gear. The two gears mesh with each other. A ring-shaped arrangement of fan plates is fixedly connected to the outer surface of each rotating shaft.

[0008] In a further embodiment, the outer surface of each of the fan plates is covered with heat insulation cotton.

[0009] In a further embodiment, two baffles are fixedly connected to the inner bottom wall of the air guide frame, and both baffles are located below the rotating shaft.

[0010] In a further embodiment, two arc-shaped guide plates are fixedly connected to the inner top wall of the air guide frame.

[0011] In a further embodiment, the input end of the extraction pipe is fixedly connected to a gas collection hood, and a filter screen is installed on the inner wall of the gas collection hood.

[0012] In a further embodiment, a heat insulation cover is installed on the upper surface of the kiln body.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This application utilizes a combination of an exhaust fan, an exhaust pipe, and a gas delivery pipe. By employing the exhaust fan, hot air can be re-transported to the kiln preheating section, thus achieving the effect of hot air recycling. Through the combination of a guide frame, a motor, a rotating shaft, and fan plates, the guide frame can concentrate heat. When the motor is working, the rotating shaft drives the fan plates to rotate in opposite directions, and the fan plates will fan the hot air downwards. The hot air will then be discharged along the guide frame to the preheating section, preventing the hot air from deviating from its direction due to airflow interference and ensuring the effectiveness of heat recycling.

[0015] The baffle plate can block the hot airflow blown by the fan, thus ensuring that the hot airflow is discharged downward to the preheating section. The combination of the air collection hood and the filter screen can not only increase the suction area for hot airflow recovery, but also filter out impurities in the hot airflow. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a circulating waste heat recovery device used in an electric kiln for ceramic bricks.

[0017] Figure 2 This is a three-dimensional structural schematic diagram of the kiln body of a circulating waste heat recovery device used in electric firing kilns for ceramic bricks.

[0018] Figure 3 This is a three-dimensional structural schematic diagram of the air guide frame of a circulating waste heat recovery device used in an electric kiln for ceramic bricks.

[0019] In the diagram: 1. Kiln body; 2. Heat insulation cover; 3. Filter screen; 4. Exhaust pipe; 5. Exhaust fan; 6. Air supply pipe; 7. Air guide frame; 8. Gear; 9. Motor; 10. Arc-shaped guide plate; 11. Heat insulation cotton; 12. Wind baffle; 13. Fan plate; 14. Rotating shaft; 15. Gas collection cover. Detailed Implementation

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-3 This invention discloses a circulating waste heat recovery device for an electric kiln for ceramic bricks, comprising a kiln body 1. An exhaust fan 5 is installed on the upper surface of the kiln body 1. An exhaust pipe 4 is fixedly connected to the input end of the exhaust fan 5, extending into the interior of the kiln body 1. An air supply pipe 6 is fixedly connected to the output end of the exhaust fan 5, extending into the interior of the kiln body 1. By utilizing the operation of the exhaust fan 5, the exhaust pipe 4 draws in hot air, which is then discharged from the air supply pipe 6 into the preheating section inside the kiln body 1, thereby achieving a circulating preheating and recovery effect.

[0023] The input end of the exhaust pipe 4 is fixedly connected to the gas collection hood 15. The inner wall of the gas collection hood 15 is equipped with a filter screen 3. The gas collection hood 15 can increase the suction area of ​​the hot airflow, further ensuring the efficiency of hot airflow recovery. At the same time, the filter screen 3 can filter out impurities in the hot airflow.

[0024] A heat insulation cover 2 is installed on the upper surface of the kiln body 1. The heat insulation cover 2 can be used to wrap and insulate the outside of the exhaust pipe 4 and the gas delivery pipe 6, which can prevent heat dissipation.

[0025] The inner top wall of the kiln body 1 is equipped with an air guide frame 7. The air guide frame 7 can be used to concentrate the hot airflow and prevent the hot airflow from running around randomly.

[0026] Two rotating shafts 14 are rotatably connected to the air guide frame 7. A motor 9 is installed on the back of the air guide frame 7. The output end of the motor 9 is connected to one end of one of the rotating shafts 14. The other end of each rotating shaft 14 passes through the air guide frame 7 and is fixedly connected to a gear 8. The two gears 8 mesh with each other. A ring of fan plates 13 is fixedly connected to the outer surface of each rotating shaft 14. The operation of the motor 9 can drive one of the rotating shafts 14 and the gear 8 to rotate. Since the two gears 8 are meshing, they will rotate in opposite directions. The rotating shaft 14 will also drive the fan plates 13 to rotate in opposite directions. The hot airflow will be blown downward and discharged, which can prevent its path from changing, thereby ensuring the effect of heat recycling.

[0027] Each fan plate 13 is covered with heat insulation cotton 11 on its outer surface. The heat insulation cotton 11 can isolate heat and prevent the fan plate 13 from absorbing heat.

[0028] Two baffles 12 are fixedly connected to the inner bottom wall of the air guide frame 7. Both baffles 12 are located below the rotating shaft 14. The baffles 12 can guide the hot airflow blown by the fan 13, ensuring that the hot airflow flows downward and is discharged, thus ensuring the heat recovery effect and preventing the hot airflow from circulating inside the air guide frame 7.

[0029] Two arc-shaped guide plates 10 are fixedly connected to the inner top wall of the air guide frame 7. The arc-shaped guide plates 10 can guide the hot airflow at the top of the air guide frame 7, allowing the hot airflow to gather again in the middle of the air guide frame 7, which is conducive to the discharge of the hot airflow from the air guide frame 7.

[0030] The working principle of this application is as follows: When in use, the exhaust fan 5 is started, and the hot airflow returns to the other end of the kiln body 1 through the exhaust pipe 4 and the air delivery pipe 6 and enters the air guide frame 7. Then, the motor 9 is started, and the motor 9 drives one of the rotating shafts 14 to rotate. At the same time, the gear 8 rotates. Since the two gears 8 are meshed, they will rotate in opposite directions. The rotating shaft 14 will drive the fan plate 13 to rotate in opposite directions. The fan plate 13 will fan the hot airflow downwards. The hot airflow will be discharged along the air guide frame 7 to the preheating section, which can prevent the hot air from deviating from its direction due to airflow interference and ensure the effect of heat circulation and recovery.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider 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 circulating waste heat recovery device for an electric kiln for ceramic brick firing, characterized in that: The kiln includes a kiln body (1), on the upper surface of which is installed an exhaust fan (5). The input end of the exhaust fan (5) is fixedly connected to an exhaust pipe (4), which extends into the interior of the kiln body (1). The output end of the exhaust fan (5) is fixedly connected to an air supply pipe (6), which extends into the interior of the kiln body (1). The inner top wall of the kiln body (1) is equipped with an air guide frame (7). Two rotating shafts (14) are rotatably connected to the air guide frame (7). A motor (9) is installed on the back of the air guide frame (7). The output end of the motor (9) is connected to one end of one of the rotating shafts (14). The other end of each rotating shaft (14) passes through the air guide frame (7) and is fixedly connected to a gear (8). The two gears (8) mesh with each other. The outer surface of each rotating shaft (14) is fixedly connected to a ring of fan plates (13).

2. The circulating waste heat recovery device for an electric kiln for ceramic brick firing according to claim 1, characterized in that: Each of the fan plates (13) has an outer surface covered with heat insulation cotton (11).

3. The circulating waste heat recovery device for an electric kiln for ceramic brick firing according to claim 1, characterized in that: The inner bottom wall of the air guide frame (7) is fixedly connected to two wind baffles (12), both of which are located below the rotating shaft (14).

4. A circulating waste heat recovery device for an electric kiln for ceramic brick firing according to claim 1, characterized in that: Two arc-shaped guide plates (10) are fixedly connected to the inner top wall of the air guide frame (7).

5. A circulating waste heat recovery device for an electric kiln for ceramic brick firing according to claim 1, characterized in that: The input end of the extraction pipe (4) is fixedly connected to a gas collection hood (15), and a filter screen (3) is installed on the inner wall of the gas collection hood (15).

6. A circulating waste heat recovery device for an electric kiln for ceramic brick firing according to claim 1, characterized in that: A heat insulation cover (2) is installed on the upper surface of the kiln body (1).

Images