Low-temperature drying kiln utilizing waste heat of tunnel kiln

Abstract

The utility model discloses a low-temperature drying kiln utilizing waste heat of a tunnel kiln. The low-temperature drying kiln comprises a low-temperature drying kiln body and a tunnel kiln smoke pipe. By adopting the heat conduction cavity, the driving shaft and the stirring rod, after the charging barrel is put into the low-temperature drying kiln main body, high-temperature flue gas can be respectively transmitted into the driving shaft, the stirring rod and the heat conduction cavity in the charging barrel through the air supply pipe and the heat transfer pipe; at the moment, heat generated by the high-temperature flue gas can be transmitted from the interior of the material to the exterior of the material through the driving shaft and the stirring rod, meanwhile, heat in the heat conduction cavity can be transmitted from the outer side of the material to the inner side of the material, and meanwhile the motor operates to drive the driving shaft and the stirring rod to stir the material; therefore, materials at different positions can make contact with heat transmitted from different positions, the heating uniformity is further improved, meanwhile, the drying effect is improved, better use is facilitated, and the beneficial effects of being uniform in heating, good in drying effect and wide in heat transmission area are achieved.

Description

Technical Field

[0001] This utility model relates to the field of low-temperature drying kiln technology, specifically to a low-temperature drying kiln that utilizes the waste heat of a tunnel kiln. Background Technology

[0002] Tunnel kilns are a common type of ceramic firing equipment. During operation, they generate a large amount of waste heat. If this waste heat is not utilized, it will result in energy waste. Since the flue gas temperature of a tunnel kiln generally does not exceed 200 degrees Celsius, while the temperature range of a low-temperature drying kiln is generally between 50°C and 200°C, the waste heat in the flue gas generated by the tunnel kiln can fully meet the needs of the low-temperature drying kiln. This allows for the utilization of waste heat from the tunnel kiln and the normal operation of the low-temperature drying kiln, thereby improving energy efficiency.

[0003] The existing publicly available technology, application number CN202020766473.3, describes a drying kiln chamber for producing refractory products. This device involves loading a suitable amount of material into a drying tray. When the heating plate is heated to a set temperature by a first and second heating mechanism, a first, second, and third transmission mechanism are activated. The drying tray is placed on a first conveying mechanism and then sequentially passes through a second support platform, a second conveying mechanism roller, the first support platform, and the third conveying mechanism. While inside the kiln, the lower surface of the drying tray is continuously heated by the heating plate. When the drying tray moves below a cylinder, the cylinder is activated. The piston rod drives a fixed rod and a motor downwards, causing a rotating rod and a stirring rod to insert into the material in the drying tray. The motor control button is activated, rapidly stirring the material in the drying tray. Subsequently, the piston rod drives the motor upwards, the motor stops, and the drying tray continues to move forward, continuously heating and drying the material. A dehumidification mechanism is activated, and water vapor inside the kiln is discharged into the atmosphere through dehumidification branch pipes, a main dehumidification pipe, and the dehumidification mechanism.

[0004] However, the aforementioned patent still has certain drawbacks in its use: although it can heat the heating plate, then transmit the drying tray to the heating plate through the transmission mechanism to dry the material inside, and then accelerate the drying efficiency by stirring the material in the drying tray through the stirring rod and rotating rod, the heating plate of the drying kiln cavity used for producing refractory products can only heat and dry the end face of the drying tray that contacts the heating plate, which limits the range of heat transfer. This makes the material at the bottom of the drying tray dry faster, resulting in uneven drying of the material in the drying tray, thereby reducing the drying efficiency and affecting the overall use effect.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a low-temperature drying kiln that utilizes the waste heat of a tunnel kiln. This kiln has the advantages of uniform heating, good drying effect, and wide heat transfer area, thereby solving the problems mentioned in the background technology.

[0007] To achieve the advantages of uniform heating, good drying effect, and wide heat transfer area, the specific technical solution adopted by this utility model is as follows:

[0008] A low-temperature drying kiln utilizing waste heat from a tunnel kiln includes a kiln body and a flue gas pipe. A heat transfer tube is fixedly installed in the middle of the kiln body. Several sets of connecting rods are installed around the bottom of the kiln body inside the heat transfer tube. A limiting plate is installed in the middle of the surface of each connecting rod and is rotatably connected to the bottom of the kiln body. A material cylinder is wrapped around the heat transfer tube. A heat-conducting cavity is formed inside the material cylinder. Several sets of connecting pipes are rotatably connected around the bottom of the material cylinder. A connecting groove is formed at the bottom of each connecting pipe. A drive disc is fixedly installed at the top of each connecting pipe. Several sets of drive shafts are installed around the top of the drive disc. Several sets of stirring rods are evenly installed on the surface of each drive shaft.

[0009] Furthermore, a heating box is fixedly installed at the bottom of the main body of the low-temperature drying kiln, and one end of the heating box is connected to the flue gas pipe of the tunnel kiln.

[0010] Furthermore, the top center of the heating box is fixedly connected to the heat transfer pipe, and several sets of air supply pipes are evenly installed on the outer side of the top of the heating box. A connecting plate is rotatably connected to the top of the air supply pipe, and the top of the connecting plate is fixedly connected to the docking rod. A transmission gear is installed in the middle of the surface of the connecting plate, and a drive gear is meshed with one end of the transmission gear. The drive gear is connected to the output end of the motor.

[0011] Furthermore, heat transfer chambers for high-temperature flue gas flow are provided inside the drive shaft, the stirring rod, the drive disc, the connecting pipe, the heat transfer pipe, the docking rod, and the connecting disc.

[0012] Furthermore, the motor is located at the bottom of the main body of the low-temperature drying kiln.

[0013] Furthermore, several sets of support legs are symmetrically installed on both sides of the bottom of the main body of the low-temperature drying kiln.

[0014] Furthermore, a sealing cover is installed at the top of the main body of the low-temperature drying kiln, and a dehumidification pipe is installed on the surface of the sealing cover.

[0015] Furthermore, handles are symmetrically installed at the top positions of both sides of the material cylinder, and openings are provided at the top positions of the material cylinder and the drive shaft.

[0016] Compared with the prior art, this utility model provides a low-temperature drying kiln that utilizes the waste heat of a tunnel kiln, which has the following beneficial effects:

[0017] This invention employs a heat-conducting cavity, a drive shaft, and a stirring rod. After the material cylinder is placed inside the main body of the low-temperature drying kiln, high-temperature flue gas can be transferred to the drive shaft, the stirring rod, and the heat-conducting cavity inside the material cylinder through the air supply pipe and heat transfer pipe, respectively. At this time, the heat generated by the high-temperature flue gas can be transferred from the inside of the material to the outside through the drive shaft and the stirring rod. Simultaneously, the heat in the heat-conducting cavity can be transferred from the outside of the material to the inside, thereby expanding the heat transfer area and facilitating better heat treatment of the material. At the same time, the operation of the motor can drive the drive shaft and the stirring rod to agitate the material, thereby moving the material so that the material at different positions can come into contact with the heat transferred from different positions, thereby expanding the heat uniformity and improving the drying effect. It is easy to use and has the advantages of uniform heating, good drying effect, and wide heat transfer area. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the structure of a low-temperature drying kiln that utilizes the waste heat of a tunnel kiln, as proposed in this utility model.

[0020] Figure 2 This is a schematic diagram of the connection between the drive disk and the connecting pipe of this utility model;

[0021] Figure 3 This is a structural schematic diagram of the limiting plate and the connecting rod of this utility model;

[0022] Figure 4 This is a schematic diagram of the connection between the connecting rod and the connecting plate of this utility model.

[0023] In the picture:

[0024] 1. Low-temperature drying kiln body; 2. Material cylinder; 3. Heat conduction chamber; 4. Drive shaft; 5. Stirring rod; 6. Heat transfer chamber; 7. Handle; 8. Sealing cover; 9. Exhaust pipe; 10. Drive disc; 11. Connecting pipe; 12. Motor; 13. Transmission gear; 14. Support leg; 15. Tunnel kiln flue gas pipe; 16. Drive gear; 17. Docking groove; 18. Limiting disc; 19. Heating box; 20. Heat transfer pipe; 21. Gas supply pipe; 22. Docking rod; 23. Connecting disc. Detailed Implementation

[0025] 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.

[0026] According to an embodiment of the present invention, a low-temperature drying kiln utilizing the waste heat of a tunnel kiln is provided.

[0027] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-4 As shown, a low-temperature drying kiln utilizing waste heat from a tunnel kiln, according to an embodiment of the present invention, includes a low-temperature drying kiln body 1 and a tunnel kiln flue gas pipe 15. A heat transfer pipe 20 is fixedly installed in the middle of the interior of the low-temperature drying kiln body 1. Several sets of connecting rods 22 are installed around the outside of the heat transfer pipe 20 at the bottom of the interior of the low-temperature drying kiln body 1. A limiting plate 18 is installed in the middle of the surface of the connecting rod 22. The limiting plate 18 is rotatably connected to the bottom of the low-temperature drying kiln body 1. A material cylinder 2 is wrapped around the heat transfer pipe 20. A heat conduction cavity 3 is opened in the interior of the material cylinder 2. Several sets of connecting pipes 11 are rotatably connected around the bottom of the interior of the material cylinder 2. A docking groove 17 is opened at the bottom of the connecting pipe 11. A drive plate 10 is fixedly installed at the top of the connecting pipe 11. Several sets of drive shafts 4 are installed around the top of the drive plate 10. Several sets of stirring rods 5 are evenly installed on the surface of the drive shafts 4.

[0028] In one embodiment, a heating box 19 is fixedly installed at the bottom of the low-temperature drying kiln body 1. One end of the heating box 19 is connected to a tunnel kiln flue gas pipe 15. The tunnel kiln flue gas pipe 15 is used to introduce the high-temperature flue gas generated by the tunnel kiln, thereby meeting the drying requirements of the low-temperature drying kiln through this part of the high-temperature flue gas. Furthermore, when the high-temperature flue gas is introduced, external filtration measures can be used to filter impurities in the flue gas to prevent impurities from affecting the smooth flow of subsequent pipelines.

[0029] In one embodiment, the top center of the heating box 19 is fixedly connected to the heat transfer pipe 20, and several sets of air supply pipes 21 are evenly installed on the outer side of the top of the heating box 19. A connecting plate 23 is rotatably connected to the top of the air supply pipe 21, and the top of the connecting plate 23 is fixedly connected to the docking rod 22. A transmission gear 13 is installed in the middle of the surface of the connecting plate 23, and a drive gear 16 is meshed at one end of the transmission gear 13. The drive gear 16 is connected to the output end of the motor 12. The heating box 19 is designed to divert the introduced high-temperature flue gas, so that the high-temperature flue gas can act on different positions, expand the overall heating area, and facilitate better drying of the internal materials.

[0030] In one embodiment, heat transfer chambers 6 for high-temperature flue gas flow are provided inside the drive shaft 4, the stirring rod 5, the drive disc 10, the connecting pipe 11, the heat transfer pipe 20, the docking rod 22, and the connecting disc 23. The heat transfer chambers 6 are designed to facilitate the introduction of high-temperature flue gas and the transfer of heat within it, thereby achieving the drying operation of the internal materials. The surface of the heat transfer pipe 20 has holes to allow high-temperature flue gas to enter the heat conduction chamber 3 inside the material cylinder 2, thereby heating the heat conduction chamber 3 and transferring heat from the outside to the inside, expanding the heat transfer range and facilitating better drying of the materials.

[0031] In one embodiment, the motor 12 is located at the bottom of the body 1 of the low-temperature drying kiln. The motor 12 is set to drive the drive disc 10, thereby agitating the internal materials, so that the materials can move and make better contact with heat, thus achieving a more comprehensive drying operation.

[0032] In one embodiment, several sets of support legs 14 are symmetrically installed on both sides of the bottom of the low-temperature drying kiln body 1. The support legs 14 can fix the entire device, thereby enhancing the practicality of the device.

[0033] In one embodiment, a sealing cover 8 is installed at the top of the main body 1 of the low-temperature drying kiln, and a dehumidification pipe 9 is installed on the surface of the sealing cover 8. The dehumidification pipe 9 is designed to facilitate the discharge of moisture generated during drying and to prevent moisture accumulation from affecting the drying effect.

[0034] In one embodiment, handles 7 are symmetrically installed at the top positions of both sides of the material cylinder 2. Openings are provided at the top positions of the material cylinder 2 and the drive shaft 4. The openings are designed to facilitate the discharge of gas after use, to avoid the continuous introduction of high-temperature flue gas causing excessive air pressure and affecting operational safety. At the same time, the heat in the discharged flue gas can also insulate the entire structure.

[0035] Working Principle: In actual use, personnel can add the material to be dried into the material cylinder 2, then open the sealing cover 8, and then place the material-loaded material cylinder 2 into the body 1 of the low-temperature drying kiln along the heat transfer pipe 20. At this time, the middle position of the material cylinder 2 can wrap around the heat transfer pipe 20, and the multiple sets of docking grooves 17 at its bottom can be inserted into the multiple sets of docking rods 22 at the bottom of the low-temperature drying kiln body 1 for convenient subsequent linkage operation. Then, the sealing cover 8 can be resealed, and then the treated high-temperature flue gas of the tunnel kiln can be introduced through the tunnel kiln flue gas pipe 15. At this time, the high-temperature flue gas will first enter the heating box 19, and then be supplied through the heating pipe 15. The high-temperature flue gas discharged from the surface of the hot box 19 via the air supply pipe 21 and heat transfer pipe 20 first enters the connecting plate 23, then flows along the connecting plate 23 into the docking rod 22, and is transferred along the docking plate to the docking groove 17. From the docking groove 17, it is transferred to the connecting pipe 11, and then through the connecting pipe 11 into the drive plate 10. Finally, it is transferred along the drive plate 10 to the interior of each drive shaft 4 and the stirring rod 5, thereby transferring heat to the surrounding materials. Simultaneously, the high-temperature flue gas inside the heat transfer pipe 20 can be transferred through its surface openings to the heat conduction chamber 3 inside the material cylinder 2, thus achieving the heating operation of the surface of the material cylinder 2. At this time, heat can be transferred from... The heat transfer from the outside in, combined with the heat transfer from the inside out by the drive shaft 4 and the stirring rod 5, effectively expands the heat transfer surface, ensuring that materials at different locations are heated evenly and improving the overall drying effect. Simultaneously, the operation of the motor 12 drives the drive gear 16 to rotate, which in turn drives the transmission gear 13. The transmission gear 13 then synchronously drives the connected disc 23 to rotate, which in turn drives the top connecting rod 22 to rotate. The connecting rod 22 then drives the connecting pipe 11 to rotate, ultimately causing the drive disc 10 to rotate. The rotation of the drive disc 10 causes the drive shaft 4 and stirring rod 5 on its surface to rotate, thereby agitating the internal materials. This allows materials in different positions to move around, ensuring that the materials can fully contact the heat in different positions, thus expanding the heating area, improving the uniformity of heating, and thus improving the overall drying effect. The moisture generated during drying can be discharged through the exhaust pipe 9 at the top, while the high-temperature flue gas introduced is discharged from the openings at the top of the material cylinder 2 and the top of the drive shaft 4 after being transferred, avoiding the continuous introduction of internal flue gas that could lead to excessive air pressure and affect operational safety. The device as a whole has the advantages of uniform heating, good drying effect, and wide heat transfer area.

[0036] 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.

[0037] 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 low-temperature drying kiln utilizing waste heat from a tunnel kiln, comprising a low-temperature drying kiln body (1) and a tunnel kiln flue gas pipe (15), characterized in that, A heat transfer tube (20) is fixedly installed in the middle of the body (1) of the low-temperature drying kiln. Several sets of docking rods (22) are installed around the bottom of the body (1) of the low-temperature drying kiln on the outside of the heat transfer tube (20). A limiting plate (18) is installed in the middle of the surface of the docking rod (22). The limiting plate (18) is rotatably connected to the bottom of the body (1) of the low-temperature drying kiln. A material cylinder (2) is wrapped around the heat transfer tube (2). A heat conduction cavity (3) is opened in the inner position of the surface of the material cylinder (2). Several sets of connecting pipes (11) are rotatably connected around the bottom of the inner position of the material cylinder (2). A docking groove (17) is opened at the bottom of the connecting pipe (11). A drive plate (10) is fixedly installed at the top of the connecting pipe (11). Several sets of drive shafts (4) are installed around the top of the drive plate (10). Several sets of stirring rods (5) are evenly installed on the surface of the drive shafts (4).

2. A low-temperature drying kiln utilizing waste heat from a tunnel kiln according to claim 1, characterized in that, A heating box (19) is fixedly installed at the bottom of the main body (1) of the low-temperature drying kiln, and one end of the heating box (19) is connected to the tunnel kiln flue gas pipe (15).

3. A low-temperature drying kiln utilizing waste heat from a tunnel kiln according to claim 2, characterized in that, The top middle position of the heating box (19) is fixedly connected to the heat transfer pipe (20). Several sets of air supply pipes (21) are evenly installed on the outer side of the top of the heating box (19). A connecting plate (23) is rotatably connected to the top of the air supply pipe (21). The top of the connecting plate (23) is fixedly connected to the docking rod (22). A transmission gear (13) is installed in the middle of the surface of the connecting plate (23). One end of the transmission gear (13) is meshed with a drive gear (16). The drive gear (16) is connected to the output end of the motor (12).

4. A low-temperature drying kiln utilizing waste heat from a tunnel kiln according to claim 1, characterized in that, Heat transfer chambers (6) for high-temperature flue gas flow are provided in the following locations: inside the drive shaft (4), inside the stirring rod (5), inside the drive disc (10), inside the connecting pipe (11), inside the heat transfer pipe (20), inside the docking rod (22), and inside the connecting disc (23).

5. A low-temperature drying kiln utilizing waste heat from a tunnel kiln according to claim 3, characterized in that, The motor (12) is located at the bottom of the body (1) of the low-temperature drying kiln.

6. A low-temperature drying kiln utilizing waste heat from a tunnel kiln according to claim 1, characterized in that, Several sets of support legs (14) are symmetrically installed on both sides of the bottom of the main body (1) of the low-temperature drying kiln.

7. A low-temperature drying kiln utilizing waste heat from a tunnel kiln according to claim 1, characterized in that, A sealing cover (8) is installed at the top of the main body (1) of the low-temperature drying kiln, and a dehumidification pipe (9) is installed on the surface of the sealing cover (8).

8. A low-temperature drying kiln utilizing waste heat from a tunnel kiln according to claim 1, characterized in that, Handles (7) are symmetrically installed on the top of both sides of the material cylinder (2), and openings are provided at the top of the material cylinder (2) and the top of the drive shaft (4).

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