Heating structure of horizontal roaster

Abstract

The utility model relates to the technical field of roasting furnace, especially disclose a heating structure of horizontal roasting furnace, aim at solving the short board that traditional horizontal roasting furnace heating uniformity is poor, heat utilization efficiency is low, and the flexibility of partition temperature control is insufficient. Through the collaborative structure of'stratified heating + hot air circulation ', realize the accurate regulation and control of temperature in the furnace and the efficient use of heat: the directional heat of upper layer stainless steel heating pipe one cooperation heat reflection plate is gathered, and the invalid heat loss is reduced; middle layer stainless steel heating pipe two are driven through air cylinder and slide along the guide rod, and the length of the sliding block is slid, and the length of the sliding block is slid, and the length of the sliding block is slid, and the length of the sliding block is slid, and the length of the sliding block is slid, and the length of the sliding block is slid, and the length of the sliding block is slid, and the length of the sliding block is slid, and the length of the sliding block is slid, and the length of the sliding block is slid, and the length of the sliding block is slid, and the length of the sliding block is slid, and the length

Description

Technical Field

[0001] This utility model relates to the field of roasting furnace technology, and in particular to a heating structure for a horizontal roasting furnace. Background Technology

[0002] Driven by both the upgrading demands for industrial material roasting and the increasing requirements for energy-saving production, the stability of the furnace temperature field and the efficiency of heat utilization have become core factors affecting roasting quality. The design of the heating structure directly determines the heat transfer efficiency and the ability to control temperature in different zones: uneven heating can easily lead to localized over-roasting or incomplete roasting of materials, affecting product quality consistency; excessive heat loss will result in energy waste and increased production costs. Therefore, efficient heating and precise temperature control are key aspects of "ensuring quality and reducing energy consumption" in horizontal roasting furnaces. Existing horizontal roasting furnace heating structures have the following prominent problems in practical applications:

[0003] Poor heating adaptability fails to meet diverse roasting needs. The roasting processes for different materials vary significantly; low-temperature preheating requires a gradual temperature increase, high-temperature sintering demands stable constant temperature, and the holding stage requires low-energy temperature control. Traditional heating structures often feature fixed heating tube layouts, enabling only single-temperature control of the entire furnace, resulting in poor adaptability. Some zone-heating models require disassembling the furnace body to adjust the heating tube positions, which is cumbersome and necessitates readjusting the temperature field after adjustment, leading to lengthy process switching times.

[0004] Low thermal efficiency leads to both energy consumption and precision issues. Traditional furnaces lack efficient heat concentration and waste heat recovery structures: heat from the heating elements easily dissipates to the furnace walls and the outside, resulting in insufficient thermal efficiency; simultaneously, the lack of hot air circulation creates temperature dead zones within the furnace, leading to uneven heating of materials. After long-term use, the aging of the insulation layer exacerbates heat loss, further widening temperature errors and making it difficult to meet the dual demands of "high quality and low energy consumption" in industrial production. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a heating structure for a horizontal roasting furnace, which solves the technical problems of poor heating uniformity, low heat utilization efficiency, and insufficient flexibility in zoned temperature control in traditional horizontal roasting furnaces.

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

[0007] The bottom of the main box is fixed to a support device with screws. An insulation layer is fixedly attached to the inside of the main box, and a heat reflector is spot-welded to the inside of the insulation layer. Below the heat reflector, a stainless steel heating tube is fixedly installed via a ceramic insulating base. On the left side of the main box, a cylinder is fixedly installed via a steel bracket. The piston rod of the cylinder is fixedly connected to a guide rod via a flange. A slider is movably mounted on the guide rod, and a second stainless steel heating tube is fixedly connected to the slider via an insulating ceramic sleeve. Inside the lower part of the main box, a heat collection plate is fixedly installed via a support column. The heat collection plate has a U-shaped groove stamped inside, with an air vent on the side. One end of the U-shaped groove is fixedly connected to a duct via welding, and the end of the duct away from the U-shaped groove is fixedly connected to a circulating fan via a flange. The circulating fan is fixed to the outer wall of the main box via a shock-absorbing bracket. A glass panel is fixedly installed on the front of the main box, with symmetrical handles on both sides. A junction box is located below the glass. An insulated lifting device is fixedly installed on the top of the main box via welding, and limit protectors are fixed to the left and right sides via bolts. The junction box is connected to an external control cabinet via a signal cable.

[0008] Preferably, the heat reflector and the stainless steel heating tube form a 30-60° angle, and a thermal expansion gap is reserved between adjacent heat reflectors. The edges of the heat reflector are reinforced by folding to avoid high-temperature deformation.

[0009] Preferably, the guide rod is a steel optical shaft, the guide rod is arranged parallel to the cylinder, and the fit clearance between the guide rod and the slider is appropriate to ensure that the slider slides smoothly without jamming.

[0010] Preferably, a graphite thermally conductive pad is sandwiched between the heat collection plate and the stainless steel heating tube, the graphite thermally conductive pad covers the area directly below the stainless steel heating tube, and the bottom of the heat collection plate is fixed to the inner wall of the bottom of the main body box by L-shaped angle steel support feet.

[0011] Preferred configuration: The junction box has partitioned wiring terminals inside, which are connected to stainless steel heating tube one, stainless steel heating tube two, circulating fan, and cylinder signal via high-temperature resistant silicone wires; the handle is a U-shaped steel structure, which is fixed to the main body box with hexagonal screws, and the surface of the handle is covered with a high-temperature resistant silicone sleeve to improve grip comfort.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] Significantly improved temperature control adaptability and process versatility: The device, covering the roasting needs of multiple materials, breaks through the limitations of the traditional horizontal roasting furnace's "constant temperature throughout the furnace" through a layered structure of "fixed heating + retractable temperature adjustment". The second stainless steel heating tube can be flexibly extended and retracted along the guide rod by a cylinder, and its length into the furnace can be adjusted without disassembling the furnace body. Combined with the directional heat concentration of the first stainless steel heating tube, it can accurately adapt to the multi-stage process requirements of different materials, such as low-temperature preheating, high-temperature sintering, and constant temperature insulation. At the same time, the hot air circulation system can adapt to the heat requirements of different materials by adjusting the power of the circulating fan, which improves the process switching efficiency compared to the traditional fixed heating structure and significantly reduces the equipment adjustment costs when producing multiple categories of products.

[0014] Dual optimization of heat utilization efficiency and heating stability: reducing energy consumption and ensuring roasting quality. The device constructs a dual system of "heat concentration + waste heat recovery" through a heat reflector and a graphite heat-conducting pad: the heat reflector and the stainless steel heating tube form a 30-60° angle, directionally reflecting heat to reduce ineffective loss, and the heat reflection efficiency is greatly improved compared with the traditional non-reflective structure; the graphite heat-conducting pad efficiently conducts the waste heat of the stainless steel heating tube to the heat collection plate, and with the hot air closed loop driven by the circulating fan, the waste heat is reused to make up for the temperature in the furnace, thus improving the overall heat utilization efficiency. Attached Figure Description

[0015] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0016] Figure 1 This is an overall structural diagram of the present invention;

[0017] Figure 2 This is a structural diagram of the heat reflector, stainless steel heating tube, and insulation layer of this utility model;

[0018] Figure 3 This is a structural diagram of the circulating fan, U-shaped trough, and heat collection plate of this utility model;

[0019] Figure 4 This is a structural diagram of the cylinder of this utility model;

[0020] Figure 5 This utility model Figure 4 Enlarged view of point A in the image.

[0021] Legend: 1. Main box; 2. Insulated hoisting device; 3. Limit protector; 4. Handle; 5. Glass; 6. Junction box; 7. Support device; 8. Heat reflector; 9. Stainless steel heating tube one; 10. Insulation layer; 11. Circulating fan; 12. Air duct; 13. U-shaped groove; 14. Heat collector plate; 15. Air outlet; 16. Concave plate; 17. Guide rod; 18. Square groove; 19. Sliding block; 20. Stainless steel heating tube two; 21. Cylinder. Detailed Implementation

[0022] This application provides a heating structure for a horizontal roasting furnace, which effectively solves the problems of poor heating uniformity, low heat utilization efficiency, and insufficient flexibility in zoned temperature control of traditional horizontal roasting furnaces.

[0023] Example

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the overall concept of the embodiments of this application is as follows:

[0025] To address the problems existing in the prior art, this utility model provides a heating structure for a horizontal roasting furnace, aiming to solve the problems of poor heating uniformity, low heat utilization efficiency, and insufficient flexibility of zoned temperature control in traditional horizontal roasting furnaces. Through the synergistic design of "layered heating and heat concentration + expandable temperature adjustment + hot air circulation and waste heat utilization", the accuracy of furnace temperature control and heat utilization rate are improved, while enhancing equipment adaptability.

[0026] The structure and connection relationships of each part of this utility model are as follows:

[0027] Main box 1: It is a rectangular sealed cavity with a reserved support device 7 installation position at the bottom, a reserved glass 5 and handle 4 and junction box 6 assembly slot on the front, and an insulated hoisting device 2 welded to the top. The overall structure has high strength and is resistant to high temperature deformation.

[0028] Support device 7: It is a rectangular steel support that is fixed to the bottom of the main body box 1 with hexagonal screws to ensure that the furnace body is placed stably and to avoid uneven stress on the internal components caused by tilting.

[0029] Insulating hoisting device 2: Double lifting lug structure, which is fully welded to the top of the main body box 1. The distance between the lifting lugs is adapted to the width of the top surface of the main body box 1. Insulating pads are added to the inside of the lifting lugs to realize the hoisting function of the furnace body while blocking the current conduction and ensuring operational safety.

[0030] Insulation layer 10: It is attached and fixed to the inner wall of the main body box 1 by high temperature resistant adhesive, and the joints are sealed with high temperature resistant tape to reduce heat loss from the furnace.

[0031] Heat reflector 8: The edges are folded to form a reinforced edge, and it is fixed to the inside of the insulation layer 10 by spot welding. It is arranged parallel to the length of the main body box 1 and forms a 30-60° angle with the stainless steel heating tube 9 below to reflect heat in a directional manner.

[0032] Stainless steel heating tube 9: Arranged parallel to the length of the main body box 1, and fixed to the bottom of the heat reflector plate 8 by a ceramic insulating base. The ceramic insulating base is spot welded to the heat reflector plate 8 to ensure that the heating tube is installed firmly and is insulated to prevent leakage.

[0033] Concave plate 16: Welded below the stainless steel heating tube 9, with rectangular grooves 18 on the upper and lower sides. The length of the grooves 18 is the same as the length of the concave plate 16, providing a sliding track for the slider 19.

[0034] Slider 19: It is slidably connected to the concave plate 16 through the square groove 18. The middle part of slider 19 has a reserved mounting hole for the insulating ceramic sleeve, which is used to assemble the stainless steel heating tube 20 and the guide rod 17.

[0035] Stainless steel heating tube 20: It is fixed to the middle of the slider 19 by an insulating ceramic sleeve. Its axis is parallel to that of stainless steel heating tube 19. It can slide along the square groove 18 with the slider 19 to adjust the length of its insertion into the furnace.

[0036] Guide rod 17: It is fixed to the piston rod of cylinder 21 by flange, and the other end is fitted with slider 19 and abuts against limit protector 3. It is arranged parallel to cylinder 21 to ensure accurate sliding direction of slider 19.

[0037] Cylinder 21: This is a pneumatic cylinder, which is fixed to the left side of the main body box 1 by a steel bracket. The piston rod axis coincides with the guide rod 17 axis, and the output thrust drives the slider 19 and the stainless steel heating tube 20 to extend and retract, thereby achieving zoned temperature control.

[0038] Heat collector plate 14: The surface is blackened and it is fixed to the bottom of the concave plate 16 by a support column. The height of the support column ensures that there is a gap between the heat collector plate 14 and the stainless steel heating tube 9, so as to ensure efficient conduction of waste heat.

[0039] U-shaped groove 13: Formed inside the heat collector plate 14 by stamping process, extending along the length of the heat collector plate 14, providing a flow channel for air heating.

[0040] Air outlet 15: evenly distributed on the heat collection plate 14 and connected to the U-shaped groove 13 to ensure that hot air is evenly discharged into the furnace.

[0041] Duct 12: One end is connected to the U-shaped groove 13 by welding, and the other end is fixed to the air outlet of the circulating fan 11 by a flange. The outside of the duct is wrapped with insulation cotton to reduce heat loss during the hot air delivery process.

[0042] Circulating fan 11: It is a high-temperature centrifugal fan, which is fixed to the outer wall of the main body box 1 by a shock-absorbing bracket. The air outlet is compatible with the inner diameter of the air duct 12. The motor is made of high-temperature resistant insulating material to ensure stable operation in a long-term high-temperature environment.

[0043] Glass 5: It is fixed to the front of the main body box 1 by a metal frame. A high-temperature resistant rubber gasket is sandwiched between the frame and the glass 5 to ensure sealing performance and prevent damage to the glass 5 due to thermal expansion and contraction.

[0044] Handle 4: The surface is covered with a high-temperature resistant silicone sleeve, which is fixed to both sides of the glass 5 by internal hex screws, making it easy to open and close the main body box 1. The silicone sleeve improves grip comfort and prevents burns.

[0045] Junction box 6: It is fixed to the bottom of glass 5 by screws. It has partitioned wiring terminals inside. The terminals are connected to the wires of stainless steel heating tube 1 9, stainless steel heating tube 20, circulating fan 11 and cylinder 21 to realize centralized circuit management.

[0046] Module for improving heating uniformity and heat utilization efficiency

[0047] The heat-concentrating effect of the heat reflector plate 8: The heat reflector plate 8 forms a 30-60° angle with the stainless steel heating tube 9, which directionally reflects the heat radiated by the stainless steel heating tube 9 towards the insulation layer 10 to the material area, reducing ineffective heat loss; a thermal expansion gap is reserved between adjacent heat reflector plates 8 to avoid the reflection angle shift caused by high temperature deformation, and the folded edge reinforcement further enhances the structural stability, ensuring the stable heat-concentrating effect under long-term high temperature.

[0048] Waste heat utilization of heat collection plate 14 and hot air circulation: The waste heat of stainless steel heating tube 19 is transferred to heat collection plate 14; after the circulation fan 11 is started, air enters U-shaped groove 13 through air duct 12, absorbs heat from heat collection plate 14 to form hot air, and then is evenly discharged into the furnace through air outlet 15 to fill the dead corners that stainless steel heating tube 19 and stainless steel heating tube 20 cannot reach, forming a closed loop of "waste heat recovery - hot air circulation - temperature compensation", which improves the overall heat utilization efficiency.

[0049] Enhanced Zone Temperature Control Flexibility Module

[0050] The cylinder 21 extends and adjusts the temperature: the cylinder 21 outputs thrust, which drives the guide rod 17 and the slider 19 to slide along the square groove 18 of the concave plate 16, thereby driving the stainless steel heating tube 20 to extend and retract; the extension length can be adjusted according to the different roasting requirements of the furnace, and it can adapt to multiple process requirements without disassembling the main body box 1.

[0051] Working principle:

[0052] This invention achieves precise temperature control within the furnace, efficient heat utilization, and stable equipment operation through the synergistic effect of "layered heating and coordinated temperature control + hot air circulation and waste heat utilization," while also considering the adaptability to the roasting process and long-term reliability. The specific process is as follows:

[0053] The formation of layered heating and zoned temperature control

[0054] Inside the main body box 1, stainless steel heating tube 19 and retractable stainless steel heating tube 20 are arranged in layers along the height direction. The heat reflector plate 8 is attached to the inner side of the insulation layer 10. The stainless steel heating tube 19 is arranged parallel to the length direction of the main body box 1 and is fixed below the heat reflector plate 8 by ceramic insulating base. The stainless steel heating tube 20 is installed on the slider 19 through insulating ceramic sleeve. The slider 19 is slidably connected to the square groove 18 of the concave plate 16. The slider 19 is also sleeved on the guide rod 17. The guide rod 17 is fixed to the piston rod of the cylinder 21 through a flange. The cylinder 21 is fixed to the left side of the main body box 1. During operation, the stainless steel heating tube 9 heats up when energized. The heat reflector plate 8 forms a 30-60° angle with the heating tube, directionally reflecting the heat radiated towards the insulation layer back to the material area, reducing ineffective heat loss. Simultaneously, according to the roasting requirements of different zones within the furnace, the cylinder 21 is controlled to extend and retract. The cylinder piston rod pushes the guide rod 17 and the slider 19 to slide along the square groove 18, causing the stainless steel heating tube 20 to extend and retract. The closer the heating tube is to the corresponding area of ​​material, the greater the heat input; conversely, the greater the distance, the less heat input. Through the layered combination of "fixed heating tube for heat concentration + retractable heating tube for temperature adjustment," precise temperature adaptation is achieved for different zones within the furnace, meeting the roasting requirements of multiple processes.

[0055] Formation of hot air circulation and waste heat utilization

[0056] A heat collection plate 14 is fixed below the concave plate 16 by a support column. A graphite thermally conductive pad is sandwiched between the heat collection plate 14 and the stainless steel heating tube 9. A U-shaped groove 13 is stamped inside the heat collection plate 14. The side of the U-shaped groove 13 is connected to an air outlet 15. One end of the U-shaped groove 13 is connected to the air outlet of the circulating fan 11 through the air duct 12. When the stainless steel heating tube 9 is working, some of the heat is conducted to the heat collection plate 14 through the graphite thermally conductive pad, realizing waste heat recovery. When the circulating fan 11 is started, air enters the U-shaped groove 13 through the air duct 12. Under the heating action of the heat collection plate 14, hot air is formed. The hot air is evenly discharged into the furnace through the air outlet 15, filling the dead area that the heating tube cannot reach, and improving the temperature uniformity in the furnace. At the same time, after circulating in the furnace, the hot air comes into contact with the heat collection plate and heating tube again to heat up, forming a closed loop of "fan → air duct → U-shaped groove → furnace → reheating". This process utilizes the waste heat from the heating element and enhances heat diffusion through hot air circulation, thus doubly improving heat utilization efficiency and reducing overall energy consumption.

[0057] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A heating structure for a horizontal roasting furnace, characterized in that, Includes a main box (1), a support device (7) is fixed to the bottom of the main box (1) by screws, and a handle (4), a junction box (6) and a glass (5) are fixed to the front of the main box (1) by screws. The handle (4) is symmetrically distributed on both sides of the glass (5), and the junction box (6) is located below the glass (5). Limit protectors (3) are fixedly installed on both sides of the main body box (1) by bolts. The axis of the limit protector (3) is parallel to the length direction of the main body box (1). An insulating hoisting device (2) is fixedly installed on the top of the main body box (1) by welding. The insulating hoisting device (2) has a double lifting lug structure and the distance between the lifting lugs is adapted to the width of the top surface of the main body box (1). The main body box (1) is fixedly installed with a heat insulation layer (10) by a high temperature resistant adhesive. The heat insulation layer (10) is fixedly attached with a heat reflector plate (8) by spot welding. A stainless steel heating tube (9) is fixedly installed below the heat reflector plate (8) by a ceramic insulating seat. The stainless steel heating tube (9) is arranged parallel to the length of the main body box (1). A concave plate (16) is fixedly installed below the stainless steel heating tube 1 (9) by a bracket. Square grooves (18) are opened on the upper and lower sides of the concave plate (16). The cross section of the square grooves (18) is rectangular and the length is the same as that of the concave plate (16). A slider (19) is provided in the concave plate (16) and is slidably connected through the square grooves (18). A stainless steel heating tube 2 (20) and a guide rod (17) are movably installed on the slider (19) through an insulating ceramic sleeve. The stainless steel heating tube 2 (20) is parallel to the stainless steel heating tube 1 (9). One end of the guide rod (17) is fixedly connected to the piston rod of the cylinder (21) through a flange. The cylinder (21) is fixed on the left side of the main body box (1) by a steel bracket and the piston rod axis coincides with the axis of the guide rod (17). A heat collection plate (14) is fixedly installed below the concave plate (16) by a support column. A U-shaped groove (13) is stamped inside the heat collection plate (14). The U-shaped groove (13) extends along the length of the heat collection plate (14). An air outlet (15) is opened on the top surface of the heat collection plate (14). The air outlet (15) is evenly distributed on the heat collection plate (14) and communicates with the U-shaped groove (13). A duct (12) is fixedly connected to one end of the U-shaped groove (13) by welding. The duct (12) is a circular steel pipe and is perpendicular to the axis of the U-shaped groove (13). A circulating fan (11) is fixedly connected to the end of the duct (12) away from the U-shaped groove (13) by a flange. The circulating fan (11) is fixed to the outside of the main body box (1) by a shock-absorbing bracket and the air outlet is adapted to the inner diameter of the duct (12).

2. The heating structure of a horizontal roasting furnace as claimed in claim 1, characterized in that: The heat reflector (8) forms a 30-60° angle with the stainless steel heating tube (9), and a thermal expansion gap is reserved between adjacent heat reflectors (8). The edges of the heat reflectors (8) are reinforced by folding to avoid high-temperature deformation.

3. The heating structure of a horizontal roasting furnace as described in claim 2, characterized in that: The guide rod (17) is a steel optical shaft. The guide rod (17) is arranged in parallel with the cylinder (21), and the clearance between the guide rod (17) and the slider (19) is to ensure that the slider (19) slides smoothly without jamming.

4. The heating structure of a horizontal roasting furnace as described in claim 3, characterized in that: A graphite heat-conducting pad is sandwiched between the heat collection plate (14) and the stainless steel heating tube (9). The graphite heat-conducting pad covers the area directly below the stainless steel heating tube (9). The bottom of the heat collection plate (14) is fixed to the bottom inner wall of the main body box (1) by L-shaped angle steel support feet.

5. The heating structure of a horizontal roasting furnace as described in claim 4, characterized in that: The junction box (6) is equipped with partitioned wiring terminals, which are connected to the stainless steel heating tube 1 (9), stainless steel heating tube 2 (20), circulating fan (11), and cylinder (21) respectively through high temperature resistant silicone wires. The handle (4) is a U-shaped steel structure, which is fixed to the main body box (1) by internal hexagon screws. The surface of the handle (4) is covered with a high temperature resistant silicone sleeve to improve the grip comfort of the thermal structure.

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