Heating device for kiln stock bin and control method of heating device

Abstract

The invention belongs to the technical field of heating control, and discloses a heating device for a kiln stock bin and a control method of the heating device. The heating device for the kiln stock bin comprises a smoke exhaust pipeline, a gas mixing device, the stock bin, a heating loop, an actuator, a temperature detection device and a controller, the inlet end of the gas mixing device is connected with the outlet end of the smoke exhaust pipeline, and the outlet end of the gas mixing device is connected with the inlet end of the heating loop. The heating loop spirally wraps the outer wall of the stock bin, the outlet end of the heating loop is connected with the inlet end of the smoke exhaust pipeline, the actuator is installed in the middle of the gas mixing device, the temperature detection device is installed on the gas mixing device on the side, close to the heating loop, of the actuator, and the controller is connected with the actuator and the temperature detection device. The energy-saving purpose can be effectively achieved, the production cost is reduced, and the product quality and the production stability are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heating control, and particularly relates to a heating device for a kiln bin and a control method thereof. Background Art

[0002] In the kiln production process, the control of the raw material temperature is the core link determining product quality, production efficiency, and energy consumption level. Its background can be traced back to the demand for fine regulation of the thermodynamic process in industrial kilns: the kiln causes physical and chemical changes in the raw materials through high-temperature calcination, and temperature, as a key variable, directly affects the reaction rate, product phase transformation, and energy consumption efficiency.

[0003] Taking a lime kiln as an example, limestone decomposes into calcium oxide and carbon dioxide at a high temperature of 800 °C to 1350 °C. This reaction is an endothermic process, and the calcination temperature needs to be precisely controlled to balance the decomposition efficiency and energy consumption. Too low a temperature will result in incomplete decomposition and reduced lime activity; too high a temperature may cause sintering, making the lime lump and reducing its looseness. Similarly, in a ceramic kiln, the raw materials need to undergo multi-stage temperature gradient control such as drying, preheating, oxidative decomposition, liquid phase formation, and crystal form transformation. For example, the crystal form transformation of quartz at 573 °C is accompanied by volume expansion, and if the heating rate gets out of control, it will cause product cracking.

[0004] Unstable control of the kiln raw material temperature will have various effects. In terms of product quality, it will cause fluctuations in product performance. For example, ceramic products may have problems such as cracking and insufficient flatness of tiles, affecting the first-class product rate; in terms of production efficiency, it will lead to unstable kiln conditions, such as phenomena like material collapse and crust formation, hindering the normal progress of production and reducing output; in terms of cost, unstable temperature will increase fuel consumption, raising production costs, and may also increase the defective rate due to product quality problems, reducing economic benefits; in terms of energy conservation, large temperature fluctuations require the kiln to frequently adjust the heating power, resulting in fuel waste, and unstable temperature is likely to reduce the thermal efficiency and increase heat loss, increasing energy consumption. Summary of the Invention

[0005] The purpose of the present invention is to provide a heating device for a kiln silo and a control method thereof to overcome the problems existing in the prior art. The present invention can set the temperature threshold of the raw materials entering the kiln according to the square characteristics of the glass materials of different kilns, and reasonably adjust the flue gas entering the heating circuit through a gas mixing device, and then use the heating circuit spirally wrapped on the outer wall of the silo to accurately control the temperature of the raw materials in the silo, thereby avoiding the energy loss caused by heating from room temperature, effectively achieving the energy-saving goal, and reducing production costs; the controller controls the actuator to adjust the gas mixing ratio according to the deviation between the set temperature and the actual temperature, ensuring that the temperature of the flue gas entering the heating circuit is stable, so that the temperature of the batch material when entering the kiln remains consistent, providing a guarantee for a stable reaction environment in the kiln, which is beneficial to improving product quality and production stability, reducing the defective rate caused by temperature fluctuations, improving overall production efficiency, reducing production costs, and improving economic benefits.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides a heating device for a kiln silo, comprising a smoke exhaust duct, a gas mixing device, a silo, a heating circuit, an actuator, a temperature detection device, and a controller; The inlet end of the gas mixing device is connected to the outlet end of the smoke exhaust pipe, and the outlet end of the gas mixing device is connected to the inlet end of the heating circuit. The heating circuit is spirally wrapped around the outer wall of the silo, and the outlet end of the heating circuit is connected to the inlet end of the smoke exhaust pipe. The actuator is installed in the middle of the gas mixing device, and the temperature detection device is installed on the gas mixing device on the side of the actuator close to the heating circuit. The controller is connected to the actuator and the temperature detection device respectively. Furthermore, the gas mixing device includes an induced draft duct connected to the outlet end of the smoke exhaust duct, the outlet end of the smoke exhaust duct is connected to the inlet end of the heating circuit through the induced draft duct, the actuator is installed in the middle of the induced draft duct, the temperature detection device is installed on the induced draft duct on the side of the actuator close to the heating circuit, and the induced draft duct between the actuator and the temperature detection device is connected to a fan through a natural wind duct; Furthermore, the actuator is an electric gate valve for controlling the amount of high-temperature flue gas entering the induced draft duct; Furthermore, the temperature detection device is a thermocouple; Furthermore, the heating circuit spirally wraps from the bottom of the outer wall surface of the silo to the top of the outer wall; Furthermore, the outlet end of the heating circuit is connected to the inlet end of the smoke exhaust duct through an air outlet pipe; In a second aspect, the present invention further provides a heating control method for a kiln silo, based on the above-mentioned heating device for a kiln silo, comprising the following steps: Set the temperature threshold of the mixed gas through the controller; The high-temperature flue gas enters the gas mixing device through the outlet end of the exhaust pipe to obtain a mixed gas; The mixed gas is introduced into the inlet end of the heating circuit, and the outer wall of the silo is heated through the heating circuit to raise the temperature of the raw materials inside the silo. During the heating process, the temperature of the mixed gas is detected in real time by a temperature detection device, and the temperature of the mixed gas is transmitted to the controller. The controller controls the opening degree of the actuator until the temperature of the mixed gas reaches the temperature threshold; The mixed gas passing through the heating circuit is introduced into the inlet end of the exhaust pipe; Further, the gas mixing device includes an air guiding pipe connected to the outlet end of the exhaust pipe. The outlet end of the exhaust pipe is connected to the inlet end of the heating circuit through the air guiding pipe. The actuator is installed in the middle of the air guiding pipe, and the temperature detection device is installed on the air guiding pipe on the side of the actuator close to the heating circuit. A blower is connected to the air guiding pipe between the actuator and the temperature detection device through a natural air pipe; The high-temperature flue gas enters the gas mixing device through the outlet end of the exhaust pipe to obtain a mixed gas, specifically including: The high-temperature flue gas enters the air guiding pipe through the outlet end of the exhaust pipe. The blower passes the normal-temperature gas into the natural air pipe, and the normal-temperature gas enters the air guiding pipe through the natural air pipe and mixes with the high-temperature flue gas to obtain a mixed gas; Further, the controller controls the opening degree of the actuator until the temperature of the mixed gas reaches the temperature threshold, specifically including: When the temperature of the mixed gas is lower than the temperature threshold, the controller controls the actuator to increase the opening degree to increase the inflow rate of the high-temperature flue gas until the temperature of the mixed gas reaches the threshold; When the temperature of the mixed gas is higher than the temperature threshold, the controller controls the actuator to decrease the opening degree to reduce the inflow rate of the high-temperature flue gas until the temperature of the mixed gas reaches the threshold; When the temperature of the mixed gas is equal to the temperature threshold, the controller controls the actuator to maintain the opening degree so that the inflow rate of the high-temperature flue gas remains unchanged; Further, the outlet end of the heating circuit is connected to the inlet end of the exhaust pipe through an air outlet pipe; The mixed gas passing through the heating circuit is introduced into the inlet end of the exhaust pipe, specifically including: The mixed gas passing through the heating circuit is introduced into the inlet end of the exhaust pipe through the air outlet pipe.

[0007] The above technical solution has the following advantages or beneficial effects: In a first aspect, the present invention provides a heating device for a kiln silo. Traditional heating methods often directly heat the normal-temperature batch materials, resulting in a large amount of energy waste. However, this device can set an appropriate temperature threshold for the raw materials when entering the kiln according to the characteristics of the glass batch of different kilns. Through the gas mixing device, the flue gas entering the heating circuit is rationally allocated, and then with the help of the heating circuit spirally coated on the outer wall of the silo, the temperature of the raw materials in the silo is precisely controlled, avoiding the energy loss caused by heating from normal temperature, effectively achieving the energy-saving goal, and reducing the production cost. The change of the external weather will directly affect the initial temperature of the batch materials, and then lead to inconsistent temperatures of the raw materials entering the kiln, affecting the stability of the reaction in the kiln and the product quality. However, the temperature detection device of this device monitors the temperature in the gas mixing device in real time and feeds the data back to the controller. The controller controls the actuator to adjust the gas mixing ratio according to the deviation between the set temperature and the actual temperature, ensuring the stability of the flue gas temperature entering the heating circuit, making the temperature of the batch materials consistent when entering the kiln, providing a guarantee for a stable reaction environment in the kiln, being beneficial to improving the product quality and production stability, reducing the defective rate caused by temperature fluctuations, enhancing the overall production efficiency, reducing the production cost, and improving the economic benefits.

[0008] Furthermore, the exhaust pipe is connected to the heating circuit through an air guiding pipe, and a fan is connected through a natural air pipe on the air guiding pipe between the actuator and the temperature detection device, so that natural air can be flexibly introduced. The actuator can accurately adjust the mixing ratio of the flue gas in the exhaust pipe and the natural air according to the data fed back by the temperature detection device, ensuring the stability of the temperature and composition of the gas entering the heating circuit and meeting different heating requirements. Using the waste heat of the kiln exhaust and natural air for mixed heating not only makes full use of energy but also can be flexibly adjusted according to the actual situation, making the silo heated more evenly. Precise temperature control avoids the problem of unstable heating caused by gas temperature fluctuations, avoids the energy loss caused by heating from normal temperature, effectively achieves the energy-saving goal, reduces the production cost, improves the overall performance of the heating device for the kiln silo, and ensures the smooth progress of kiln production.

[0009] Furthermore, the electric gate valve is used as the actuator, which has the advantages of fast response speed and high control precision. It can accurately adjust the amount of high-temperature flue gas introduced into the air guiding pipe according to the actual needs, effectively avoiding the influence of gas flow fluctuations on the heating effect, ensuring the stability of the silo heating temperature, and enhancing the reliability and stability of the kiln production process.

[0010] Furthermore, the thermocouple is used as the temperature detection device, which has high measurement accuracy and fast response speed. It can sense the gas temperature in the air guiding pipe in real time and accurately, and can quickly convert the temperature signal into an electrical signal and transmit it to the controller, enabling the system to adjust the actuator action in time according to the temperature change, ensuring the stability of the silo heating temperature, and enhancing the heating effect and the quality of kiln production.

[0011] Furthermore, the helical coating heating circuit extends from the bottom to the top of the outer wall of the silo, greatly improving the heating uniformity and avoiding local temperature differences. At the same time, it increases the contact area with the silo, strengthens heat exchange, speeds up the heating rate, can flexibly adapt to the shape of the silo, facilitates process adjustment, reduces heat loss, and improves energy utilization efficiency.

[0012] Furthermore, the outlet end of the heating circuit is connected to the inlet end of the smoke exhaust pipe through an air outlet pipe, which can realize the recycling of flue gas waste heat, improve energy utilization rate, and reduce production costs. At the same time, it simplifies the system structure, reduces equipment investment and maintenance difficulty, can also stabilize the system pressure and temperature, ensure the production stability of the kiln furnace, and reduce flue gas emissions, reduce environmental pollution, meeting the requirements of environmental protection production.

[0013] In a second aspect, the present invention also provides a heating control method for a kiln furnace silo. By setting the temperature threshold of the mixed gas through a controller and using a temperature detection device to real-time feedback temperature data, the controller can accurately control the opening degree of the actuator, making the temperature of the mixed gas reach the set value. The accurate temperature control ensures that the outer wall of the silo is uniformly and stably heated, and then the raw materials inside the silo are heated smoothly, avoiding problems such as uneven heating or local overheating and overcooling of the raw materials caused by temperature fluctuations, effectively improving the heating quality of the raw materials, providing good conditions for the subsequent reaction in the kiln furnace, and helping to improve the product yield and quality stability. The heated mixed gas is introduced into the smoke exhaust pipe from the heating circuit, realizing the recycling of waste heat. While meeting the heating requirements of the silo, it maximally recovers the waste heat in the flue gas, reduces energy waste, and reduces the energy consumption during the production process of the kiln furnace. It not only conforms to the production concept of energy conservation and emission reduction, but also can significantly reduce the production costs of enterprises and improve economic benefits.

[0014] Furthermore, by setting a natural air pipe and a fan on the air intake pipe, the normal temperature gas is mixed with the high-temperature flue gas. With the actuator controlling the intake amount of the high-temperature flue gas and the fan adjusting the intake amount of the normal temperature gas, the temperature of the mixed gas can be flexibly and accurately adjusted to meet the heating requirements of different raw materials, ensuring that the raw materials in the silo are heated at an appropriate temperature, improving the heating effect and product quality. Utilizing the waste heat of the high-temperature flue gas discharged from the kiln furnace to mix with the normal temperature gas to heat the silo realizes the cascade utilization of energy. It can meet the heating requirements while reducing energy consumption, reducing the dependence on external energy, improving energy utilization efficiency, conforming to the requirements of energy conservation and emission reduction production, and reducing the production costs of enterprises.

[0015] Furthermore, based on the comparison between the temperature of the mixed gas and the threshold value, the controller precisely adjusts the opening degree of the actuator. When the temperature is low, the opening degree is increased to increase the inflow of high-temperature flue gas; when the temperature is high, the opening degree is decreased to reduce the inflow. When the temperature reaches the standard, the opening degree is maintained. The dynamic adjustment mechanism can keep the temperature of the mixed gas stable at the set threshold value all the time, ensuring that the outer wall of the bin is evenly and stably heated. Furthermore, it guarantees that the raw materials in the bin are evenly heated at an appropriate temperature, improving the heating effect and providing high-quality raw materials for the kiln production. The real-time and precise temperature control avoids large fluctuations in the temperature of the mixed gas, reduces the thermal stress impact on each component of the heating system caused by abnormal temperature, reduces the probability of equipment damage and failures, extends the service life of the equipment, improves the stability and reliability of the entire heating control system, and ensures the continuity of the kiln production. By precisely controlling the inflow of high-temperature flue gas, excessive consumption and waste of energy are avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a schematic structural diagram of a heating device for a kiln bin according to the present invention; Figure 2 FIG. is a schematic flow chart of a heating control method for a kiln bin according to the present invention; In the figure, 1 - exhaust duct; 2 - air draft pipe; 3 - actuator; 4 - temperature detection device; 5 - natural air duct; 6 - controller; 7 - bin; 8 - heating circuit; 9 - air outlet duct; 10 - fan. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following further elaborates on the present invention in detail with specific embodiments, which are explanations rather than limitations of the present invention. In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of the present invention are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0018] Embodiment: Refer to Figure 1 , the present invention provides a heating device for a kiln furnace bin, comprising a smoke exhaust pipe 1, a gas mixing device, a bin 7, a heating circuit 8, an actuator 3, a temperature detection device 4 and a controller 6; the gas mixing device comprises an induced air pipe 2, a natural air pipe 5 and a fan 10; The inlet end of the gas mixing device is connected to the outlet end of the smoke exhaust pipe 1, the outlet end of the gas mixing device is connected to the inlet end of the heating circuit 8, the heating circuit 8 is spirally coated on the outer wall of the bin 7, the heating circuit 8 spirally wraps from the bottom surface of the outer wall of the bin 7 to the top of the outer wall, the outlet end of the heating circuit 8 is connected to the inlet end of the smoke exhaust pipe 1 through an air outlet pipe 9, the actuator 3 is installed in the middle of the gas mixing device, the temperature detection device 4 is installed on the gas mixing device on the side of the actuator 3 close to the heating circuit 8, and the controller 6 is respectively connected to the actuator 3 and the temperature detection device 4; the induced air pipe 2 of the gas mixing device is connected to the outlet end of the smoke exhaust pipe 1, the outlet end of the smoke exhaust pipe 1 is connected to the inlet end of the heating circuit 8 through the induced air pipe 2, the actuator 3 is installed in the middle of the induced air pipe 2, the temperature detection device 4 is installed on the induced air pipe 2 on the side of the actuator 3 close to the heating circuit 8, and the induced air pipe 2 between the actuator 3 and the temperature detection device 4 is connected to the fan 10 through the natural air pipe 5; the actuator 3 is an electric gate valve, which has the function of remote automatic switching in a high-temperature environment and is used to control the inflow of high-temperature flue gas in the induced air pipe 2, and the temperature detection device 4 is a thermocouple; Preferably, the induced air pipe 2 is a metal round pipe with a diameter of 100 ± 50 mm. The metal material has high strength and high temperature resistance, can meet the high-temperature environment requirements of the heating device for the kiln furnace bin, and is not easily damaged or deformed; the round pipe shape design is conducive to the smooth flow of gas, reduces the air flow resistance, ensures the efficient transmission of heat, and thus improves the working efficiency and stability of the entire heating device; Preferably, a heat insulation layer is provided on the surface of the air draft pipe 2, which can be an aluminum silicate fiber layer, a polyurethane foam layer, a rubber and plastic heat insulation material layer, or other heat insulation layers that can achieve the heat insulation function. The heat insulation layer can effectively reduce the heat loss during the transmission of the air draft pipe 2, improve the heat utilization rate, and reduce energy consumption. At the same time, it can also maintain the temperature stability inside the air draft pipe 2, ensure the overall performance of the heating device for the kiln furnace bin, and improve the heating effect and production efficiency. Preferably, the interface between the air draft pipe 2 and the natural air pipe 5 is welded and sealed. Welding can make the two combine tightly and firmly, effectively avoid gas leakage, and ensure the stability and safety of heat transfer. At the same time, the welding has good sealing performance, can reduce the heat loss at the connection, improve the energy utilization efficiency, and thus improve the overall performance of the heating device for the kiln furnace bin. Preferably, the model of the controller 6 can be the Siemens - S7 - 1200 / 1500 series temperature module, which can receive and calculate the temperature value of the mixed gas received, compare the temperature value of the mixed gas with the pre - set temperature threshold, and control the opening degree of the actuator 3 according to the comparison result. Preferably, the outer surface of the heating circuit 8 is coated with heat insulation material, which can be polyurethane foam, rock wool / glass wool, ceramic fiber, or other materials that can achieve heat insulation. The heat insulation material can significantly reduce the heat loss of the heating circuit during operation, improve the heat utilization rate, and reduce energy waste. At the same time, it also helps to maintain the temperature stability of the heating circuit, ensure the uniform heating of the kiln furnace bin, improve the heating effect, reduce the operation cost, and enhance the practicality of the device.

[0019] See Figure 2 , in another embodiment of the present invention, a heating control method for a kiln furnace bin is also provided, including the following steps: Step 1, set the temperature threshold of the mixed gas through the controller 6. Step 2, the high - temperature flue gas enters the air draft pipe 2 through the outlet end of the smoke exhaust pipe 1, the fan 10 passes the normal - temperature gas into the natural air pipe 5, and the normal - temperature gas enters the air draft pipe 2 through the natural air pipe 5 and mixes with the high - temperature flue gas to obtain the mixed gas. Step 3: The mixed gas is introduced into the inlet end of the heating circuit 8, and the outer wall of the silo 7 is heated through the heating circuit 8 to raise the temperature of the raw materials inside the silo 7. During the heating process, the temperature of the mixed gas is detected in real time by the temperature detection device 4, and the temperature of the mixed gas is transmitted to the controller 6. The controller 6 controls the opening degree of the actuator 3 until the temperature of the mixed gas reaches the temperature threshold. Specifically, when the temperature of the mixed gas is lower than the temperature threshold, the controller 6 controls the actuator 3 to increase the opening degree to increase the inflow of high-temperature flue gas until the temperature of the mixed gas reaches the threshold; when the temperature of the mixed gas is higher than the temperature threshold, the controller 6 controls the actuator 3 to decrease the opening degree to reduce the inflow of high-temperature flue gas until the temperature of the mixed gas reaches the threshold; when the temperature of the mixed gas is equal to the temperature threshold, the controller (6) controls the actuator (3) to maintain the opening degree so that the inflow of high-temperature flue gas remains unchanged. Step 4: The mixed gas passing through the heating circuit 8 is introduced into the inlet end of the exhaust pipe 1 through the air outlet pipe 9.

[0020] The structure and working principle of the present invention will be further described below: The purpose of the present invention is to provide a heating device for a kiln furnace silo and its control method. When using a heating device for a kiln furnace silo, high-temperature flue gas enters the air guiding pipe 2 through the outlet end of the exhaust pipe 1. The fan 10 introduces normal-temperature gas into the natural air pipe 5, and the normal-temperature gas enters the air guiding pipe 2 through the natural air pipe 5. The normal-temperature gas and the high-temperature flue gas are mixed in the air guiding pipe 2 to obtain a mixed gas. The mixed gas is introduced into the inlet end of the heating circuit 8, and the outer wall of the silo 7 is heated through the heating circuit 8 spirally coated on the outer wall of the silo 7 to raise the temperature of the raw materials inside the silo 7, and then is introduced into the inlet end of the exhaust pipe 1 through the air outlet pipe 9. During the heating process, the temperature of the mixed gas is detected in real time by the temperature detection device 4, and the temperature detection device 4 transmits the real-time detected temperature of the mixed gas to the controller 6. When the temperature of the mixed gas is lower than the temperature threshold, the controller 6 controls the actuator 3 to increase the opening degree to increase the inflow of high-temperature flue gas until the temperature of the mixed gas reaches the threshold; when the temperature of the mixed gas is higher than the temperature threshold, the controller 6 controls the actuator 3 to decrease the opening degree to reduce the inflow of high-temperature flue gas until the temperature of the mixed gas reaches the threshold; when the temperature of the mixed gas is equal to the temperature threshold, the controller 6 controls the actuator 3 to maintain the opening degree so that the inflow of high-temperature flue gas remains unchanged.

[0021] The present invention can set the temperature of the raw materials entering the kiln furnace according to the characteristics of the glass batch of different kiln furnaces, avoid the energy waste of heating from normal-temperature batch materials, achieve energy-saving effects, and also avoid the inconsistent temperature of the batch materials entering the kiln furnace due to external weather reasons, improving the stability of the kiln furnace production process.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heating device for a kiln bin, characterized in that, It includes a smoke exhaust pipe (1), a gas mixing device, a silo (7), a heating circuit (8), an actuator (3), a temperature detection device (4), and a controller (6); The inlet end of the gas mixing device is connected to the outlet end of the smoke exhaust pipe (1), the outlet end of the gas mixing device is connected to the inlet end of the heating circuit (8), the heating circuit (8) is spirally wrapped around the outer wall of the silo (7), the outlet end of the heating circuit (8) is connected to the inlet end of the smoke exhaust pipe (1), the actuator (3) is installed in the middle of the gas mixing device, the temperature detection device (4) is installed on the gas mixing device on the side of the actuator (3) close to the heating circuit (8), and the controller (6) is respectively connected to the actuator (3) and the temperature detection device (4).

2. The heating device for a kiln bin according to claim 1, characterized in that, The gas mixing device includes an air draft pipe (2) connected to the outlet end of the smoke exhaust pipe (1). The outlet end of the smoke exhaust pipe (1) is connected to the inlet end of the heating circuit (8) through the air draft pipe (2). The actuator (3) is installed in the middle of the air draft pipe (2). The temperature detection device (4) is installed on the air draft pipe (2) on the side of the actuator (3) close to the heating circuit (8). A fan (10) is connected to the air draft pipe (2) between the actuator (3) and the temperature detection device (4) through a natural air pipe (5).

3. A heating device for a kiln bin according to claim 2, characterized in that, The actuator (3) is an electric gate valve for controlling the inflow of high-temperature flue gas in the air draft pipe (2).

4. The heating device for a kiln bin according to claim 2, characterized in that, The temperature detection device (4) is a thermocouple.

5. A heating device for a kiln bin according to claim 1, characterized in that, The heating circuit (8) is spirally wrapped from the bottom surface of the outer wall of the silo (7) to the top of the outer wall.

6. The heating device for a kiln bin according to claim 1, characterized in that, The outlet end of the heating circuit (8) is connected to the inlet end of the smoke exhaust pipe (1) through an air outlet pipe (9).

7. A heating control method for a kiln silo, characterized in that, A heating device for a kiln silo according to any one of claims 1-6 includes the following steps: Set the temperature threshold of the mixed gas through the controller (6); The high-temperature flue gas enters the gas mixing device through the outlet end of the smoke exhaust pipe (1) to obtain a mixed gas; The mixed gas is introduced into the inlet end of the heating circuit (8), and the outer wall of the silo (7) is heated through the heating circuit (8) to raise the temperature of the raw materials inside the silo (7). During the heating process, the temperature of the mixed gas is detected in real time through the temperature detection device (4), and the temperature of the mixed gas is transmitted to the controller (6). The controller (6) controls the opening degree of the actuator (3) until the temperature of the mixed gas reaches the temperature threshold; The mixed gas passing through the heating circuit (8) is introduced into the inlet end of the smoke exhaust pipe (1).

8. A heating control method for a kiln bin according to claim 7, characterized in that, The gas mixing device includes an air draft pipe (2) connected to the outlet end of the smoke exhaust pipe (1). The outlet end of the smoke exhaust pipe (1) is connected to the inlet end of the heating circuit (8) through the air draft pipe (2). The actuator (3) is installed in the middle of the air draft pipe (2). The temperature detection device (4) is installed on the air draft pipe (2) on the side of the actuator (3) close to the heating circuit (8). A fan (10) is connected to the air draft pipe (2) between the actuator (3) and the temperature detection device (4) through a natural air pipe (5); The high-temperature flue gas enters the gas mixing device through the outlet end of the smoke exhaust pipe (1) to obtain a mixed gas, specifically including: The high-temperature flue gas enters the induced draft pipe (2) through the outlet end of the exhaust pipe (1). The fan (10) feeds the normal-temperature gas into the natural air pipe (5), and the normal-temperature gas enters the induced draft pipe (2) through the natural air pipe (5) and mixes with the high-temperature flue gas to obtain the mixed gas.

9. A heating control method for a kiln bin according to claim 7, characterized in that The controller (6) controls the opening degree of the actuator (3) until the temperature of the mixed gas reaches the temperature threshold, which specifically includes: When the temperature of the mixed gas is lower than the temperature threshold, the controller (6) controls the actuator (3) to increase the opening degree, so that the inflow of the high-temperature flue gas increases until the temperature of the mixed gas reaches the threshold; When the temperature of the mixed gas is higher than the temperature threshold, the controller (6) controls the actuator (3) to decrease the opening degree, so that the inflow of the high-temperature flue gas decreases until the temperature of the mixed gas reaches the threshold; When the temperature of the mixed gas is equal to the temperature threshold, the controller (6) controls the actuator (3) to maintain the opening degree, so that the inflow of the high-temperature flue gas remains unchanged.

10. A heating control method for a kiln bin according to claim 7, characterized in that, The outlet end of the heating circuit (8) is connected to the inlet end of the exhaust pipe (1) through the air outlet pipe (9); The mixed gas passing through the heating circuit (8) is fed into the inlet end of the exhaust pipe (1), which specifically includes: The mixed gas passing through the heating circuit (8) is fed into the inlet end of the exhaust pipe (1) through the air outlet pipe (9).

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