A heating device for kiln silos

Abstract

This utility model belongs to the field of heating control technology and discloses a heating device for a kiln silo, including a flue gas pipe, 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 flue gas pipe, and the outlet end of the gas mixing device is connected to the inlet end of the heating circuit. The heating circuit spirally covers the outer wall of the silo, and the outlet end of the heating circuit is connected to the inlet end of the flue gas 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 near the side of the actuator close to the heating circuit. The controller is connected to both the actuator and the temperature detection device. This utility model can effectively achieve energy-saving goals, reduce production costs, and improve product quality and production stability.

Description

Technical Field

[0001] This utility model relates to the field of heating control technology, specifically to a heating device for a kiln silo. Background Technology

[0002] In kiln production processes, raw material temperature control is a core element that determines product quality, production efficiency, and energy consumption levels. This stems from the need for precise thermodynamic control in industrial kilns: kilns induce physicochemical changes in raw materials through high-temperature calcination, and temperature, as a key variable, directly affects reaction rates, product phase transitions, and energy efficiency.

[0003] Taking lime kilns as an example, limestone decomposes into calcium oxide and carbon dioxide at high temperatures of 800 ℃ to 1350 ℃. This reaction is an endothermic process, requiring precise control of the calcination temperature to balance decomposition efficiency and energy consumption. Too low a temperature leads to incomplete decomposition and reduces lime activity; too high a temperature may trigger sintering, causing the lime to clump and reducing its bulk. Similarly, in ceramic kilns, raw materials undergo multi-stage temperature gradient control, including drying, preheating, oxidative decomposition, liquid phase formation, and crystal transformation. For example, quartz undergoes a crystal transformation at 573 ℃ accompanied by volume expansion; if the heating rate is out of control, the product will crack.

[0004] Unstable raw material temperature control in kilns has multiple impacts. In terms of product quality, it causes fluctuations in product performance, such as cracking in ceramic products or insufficient flatness in tiles, affecting the yield rate. Regarding production efficiency, it leads to unstable kiln conditions, such as material collapse and crusting, hindering normal production and reducing output. In terms of cost, unstable temperature increases fuel consumption, raising production costs, and may also increase the defect rate due to product quality issues, reducing economic benefits. In terms of energy conservation, large temperature fluctuations require frequent adjustments to the kiln's heating power, leading to fuel waste, and unstable temperature also reduces thermal efficiency, increases heat loss, and raises energy consumption. Utility Model Content

[0005] The purpose of this invention is to provide a heating device for kiln silos to overcome the problems existing in the prior art. This invention can set an appropriate temperature threshold for the raw materials entering the kiln according to the characteristics of glass batches in different kilns. A gas mixing device rationally distributes the flue gas entering the heating circuit. With the help of a spiral heating circuit covering the outer wall of the silo, the temperature of the raw materials inside the silo is precisely controlled, avoiding energy loss caused by heating from room temperature, effectively achieving energy-saving goals and reducing production costs. The controller adjusts the gas mixing ratio according to the deviation between the set temperature and the actual temperature, ensuring a stable temperature of the flue gas entering the heating circuit. This ensures that the temperature of the batch material entering the kiln remains consistent, providing a stable reaction environment within the kiln. This is beneficial for improving product quality and production stability, reducing the defect rate caused by temperature fluctuations, improving overall production efficiency, reducing production costs, and increasing economic benefits.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides a heating device for a kiln silo, including a flue gas pipe, a gas mixing device, a silo, a heating circuit, an actuator, a temperature detection device, and a controller;

[0008] The inlet of the gas mixing device is connected to the outlet of the exhaust pipe, the outlet of the gas mixing device is connected to the inlet of the heating circuit, the heating circuit is spirally wrapped around the outer wall of the hopper, the outlet of the heating circuit is connected to the inlet of the exhaust pipe, the actuator is installed in the middle of the gas mixing device, the temperature detection device is installed on the gas mixing device near the heating circuit, and the controller is connected to the actuator and the temperature detection device respectively.

[0009] Furthermore, the gas mixing device includes an exhaust 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 exhaust pipe, the actuator is installed in the middle of the exhaust pipe, the temperature detection device is installed on the exhaust pipe on the side of the actuator closer to the heating circuit, and a fan is connected to the exhaust pipe between the actuator and the temperature detection device through a natural air duct.

[0010] Furthermore, the actuator is an electric gate valve, used to control the amount of high-temperature flue gas introduced into the exhaust duct;

[0011] Furthermore, the temperature detection device is a thermocouple;

[0012] Furthermore, the surface of the air duct is provided with a heat insulation layer;

[0013] Furthermore, the exhaust pipe is a metal circular pipe;

[0014] Furthermore, the exhaust duct is welded to the natural ventilation duct;

[0015] Furthermore, the heating circuit spirals from the bottom of the outer wall surface of the silo to the top of the outer wall;

[0016] Furthermore, the outlet end of the heating circuit is connected to the inlet end of the smoke exhaust pipe via an air outlet pipe;

[0017] Furthermore, the outer surface of the heating circuit is covered with heat-insulating material.

[0018] The above technical solution has the following advantages or beneficial effects:

[0019] This invention provides a heating device for a kiln silo. Traditional heating methods often directly heat the batch material at room temperature, resulting in significant energy waste. This device, however, can set appropriate temperature thresholds for the raw materials entering the kiln based on the characteristics of different kiln materials. A gas mixing device rationally distributes the flue gas entering the heating circuit, and a spiral heating circuit covering the outer wall of the silo precisely controls the temperature of the raw materials inside, avoiding energy loss from heating from room temperature. This effectively achieves energy-saving goals and reduces production costs. External weather changes directly affect the initial temperature of the batch material, leading to… Inconsistent raw material temperatures entering the kiln affect the stability of the reaction and product quality. This device's temperature detection unit monitors the temperature within the gas mixing unit in real time and feeds the data back to the controller. The controller, based on the deviation between the set and actual temperatures, adjusts the gas mixing ratio by controlling the actuator, ensuring a stable flue gas temperature entering the heating circuit. This ensures consistent temperature of the batch materials entering the kiln, guaranteeing a stable reaction environment within the kiln. This improves product quality and production stability, reduces defect rates caused by temperature fluctuations, enhances overall production efficiency, reduces production costs, and increases economic benefits.

[0020] Furthermore, by connecting the exhaust duct to the heating circuit via an induced draft duct, and connecting the blower to the natural air duct on the induced draft duct between the actuator and the temperature detection device, natural air can be flexibly introduced. The actuator can precisely adjust the mixing ratio of flue gas and natural air in the exhaust duct based on the data fed back by the temperature detection device, ensuring the stability of the gas temperature and composition entering the heating circuit and meeting different heating requirements. Utilizing the waste heat from the kiln exhaust and natural air for heating not only makes full use of energy but also allows for flexible adjustments based on actual conditions, resulting in more uniform heating of the silo. Precise temperature control avoids heating instability caused by gas temperature fluctuations, avoids energy loss caused by starting heating from room temperature, effectively achieves energy-saving goals, reduces production costs, and improves the overall performance of the kiln silo heating device, ensuring the smooth operation of the kiln.

[0021] Furthermore, the electric gate valve, as an actuator, has the advantages of fast response speed and high control precision. It can accurately adjust the amount of high-temperature flue gas entering the induced draft pipe according to actual needs, effectively avoid the impact of gas flow fluctuations on the heating effect, ensure the stability of the silo heating temperature, and improve the reliability and stability of the kiln production process.

[0022] Furthermore, thermocouples, as temperature detection devices, have high measurement accuracy and fast response speed. They can sense the gas temperature inside the duct in real time and accurately, and can quickly convert the temperature signal into an electrical signal and transmit it to the controller. This allows the system to adjust the actuator action in a timely manner according to temperature changes, ensuring stable heating temperature in the silo and improving heating effect and kiln production quality.

[0023] Furthermore, the insulation layer can effectively reduce heat loss during the transmission of air through the duct, improve heat utilization, and reduce energy consumption; at the same time, it can also maintain a stable temperature inside the duct, ensure the overall performance of the kiln silo heating device, and improve heating effect and production efficiency.

[0024] Furthermore, the high strength and high temperature resistance of the metal material can meet the high-temperature environment requirements of the kiln silo heating device and is not easily damaged or deformed; the round tube shape design facilitates smooth gas flow, reduces airflow resistance, and ensures efficient heat transfer, thereby improving the working efficiency and stability of the entire heating device.

[0025] Furthermore, welding enables the two to be tightly and firmly joined, effectively preventing gas leakage and ensuring the stability and safety of heat transmission. At the same time, the good sealing performance of welding can reduce heat loss at the joint, improve energy utilization efficiency, and thus enhance the overall performance of the kiln silo heating device.

[0026] Furthermore, the spiral-shaped heating circuit extends from the bottom to the top of the outer wall of the silo, greatly improving heating uniformity and avoiding localized temperature differences. At the same time, it increases the contact area with the silo, enhances heat exchange, accelerates the heating rate, and can flexibly adapt to the shape of the silo, facilitating process adjustments. It also reduces heat loss and improves energy utilization efficiency.

[0027] Furthermore, the outlet end of the heating circuit can be connected to the inlet end of the flue gas duct through the air outlet pipe to realize the recycling of waste heat from the flue gas, improve energy utilization, and reduce production costs. At the same time, it simplifies the system structure, reduces equipment investment and maintenance difficulty, stabilizes system pressure and temperature, ensures the stability of kiln production, and reduces flue gas emissions, thus reducing environmental pollution and meeting environmental protection production requirements.

[0028] Furthermore, insulation materials can significantly reduce heat loss in the heating circuit during operation, improve heat utilization, and reduce energy waste. At the same time, they also help maintain a stable temperature in the heating circuit, ensure uniform heating of the kiln silo, improve heating effect, reduce operating costs, and enhance the practicality of the equipment. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a heating device for a kiln silo according to the present invention.

[0030] In the diagram, 1-exhaust duct; 2-exhaust duct; 3-actuator; 4-temperature detection device; 5-natural ventilation duct; 6-controller; 7-silo; 8-heating circuit; 9-air outlet duct; 10-fan. Detailed Implementation

[0031] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," 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, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] See Figure 1 This utility model provides a heating device for a kiln silo, including a flue 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 gas mixing device includes an exhaust pipe 2, a natural air duct 5, and a fan 10;

[0038] The inlet of the gas mixing device is connected to the outlet of the exhaust pipe 1, and the outlet of the gas mixing device is connected to the inlet of the heating circuit 8. The heating circuit 8 spirally wraps around the outer wall of the silo 7, extending from the bottom to the top of the outer wall. The outlet of the heating circuit 8 is connected to the inlet of the exhaust pipe 1 via the exhaust pipe 9. The actuator 3 is installed in the middle of the gas mixing device, and the temperature detection device 4 is installed on the gas mixing device near the side of the actuator 3 close to the heating circuit 8. The controller 6 is connected to both the actuator 3 and the temperature detection device 4. The exhaust pipe 2 of the gas mixing device is connected to the outlet of the exhaust pipe 1. The outlet end of the exhaust pipe is connected to the inlet end of the heating circuit 8 through the exhaust pipe 2. The actuator 3 is installed in the middle of the exhaust pipe 2. The temperature detection device 4 is installed on the exhaust pipe 2 on the side of the actuator 3 near the heating circuit 8. The outer surface of the heating circuit 8 is covered with insulation material. The exhaust pipe 2 between the actuator 3 and the temperature detection device 4 is connected to the fan 10 through the natural air duct 5. The interface between the exhaust pipe 2 and the natural air duct 5 is welded and sealed. The actuator 3 is an electric gate valve with remote automatic switching function in high temperature environment. It is used to control the amount of high temperature flue gas entering the exhaust pipe 2. The temperature detection device 4 is a thermocouple. The surface of the exhaust pipe 2 is provided with an insulation layer. The exhaust pipe 2 is a metal round pipe.

[0039] Preferably, the exhaust pipe 2 is a metal circular pipe with a diameter of 100±50 mm;

[0040] Preferably, the insulation layer on the surface of the air duct 2 can be an aluminum silicate fiber layer, a polyurethane foam layer, a rubber and plastic insulation material layer, or other insulation layers that can achieve the insulation function.

[0041] Preferably, the controller 6 can be a Siemens S7-1200 / 1500 series temperature module, which can receive and calculate the received mixed gas temperature value, compare the mixed gas temperature value with a preset temperature threshold, and control the opening degree of the actuator 3 based on the comparison result.

[0042] Preferably, the insulation material covering the outer surface of the heating circuit 8 can be polyurethane foam, rock wool / glass wool, ceramic fiber, or other materials that can achieve insulation.

[0043] The structure and working principle of this utility model will be further explained below:

[0044] The purpose of this invention is to provide a heating device for a kiln silo. When using this device, high-temperature flue gas enters the induced draft pipe 2 through the outlet end of the exhaust pipe 1. A blower 10 introduces room-temperature gas into the natural ventilation pipe 5. The room-temperature gas then enters the induced draft pipe 2 through the natural ventilation pipe 5. The room-temperature gas and high-temperature flue gas mix in the induced draft pipe 2 to obtain a mixed gas. This mixed gas is then introduced into the inlet end of the heating circuit 8. The heating circuit 8, which spirally surrounds the outer wall of the silo 7, heats the outer wall of the silo 7, raising the temperature of the raw materials inside the silo 7. The heated gas then enters the inlet end of the exhaust pipe 1 through the outlet pipe 9. During the heating process, the temperature... The detection device 4 monitors the temperature of the mixed gas in real time and transmits the real-time 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, thereby increasing the flow rate 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, thereby decreasing the flow rate 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, thereby keeping the flow rate of high-temperature flue gas constant.

[0045] This invention allows for setting appropriate temperatures for raw materials entering the kiln based on the characteristics of glass batches in different kilns. This avoids energy waste from heating batches at room temperature, achieving energy savings. It also prevents inconsistent temperatures of batches entering the kiln due to external weather conditions, thus improving the stability of the kiln production process.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0047] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications made to the technical solutions based on the technical concept proposed by this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. A heating device for a kiln silo, 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 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 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 near the side of the actuator (3) close to the heating circuit (8), and the controller (6) is connected to the actuator (3) and the temperature detection device (4) respectively.

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

3. A heating device for a kiln bin as claimed in claim 2, characterised in that, The actuator (3) is an electric gate valve used to control the amount of high-temperature flue gas entering the duct (2).

4. A heating device for a kiln bin as claimed in claim 2, wherein, The temperature detection device (4) is a thermocouple.

5. A heating device for a kiln bin as claimed in claim 2, wherein, The surface of the air duct (2) is provided with a heat insulation layer.

6. A heating device for a kiln bin as claimed in claim 2, wherein, The air duct (2) is a metal round tube.

7. A heating device for a kiln bin as claimed in claim 2, wherein, The exhaust pipe (2) is welded to the natural air pipe (5).

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

9. A 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 the air outlet pipe (9).

10. A heating device for a kiln bin as claimed in claim 1, wherein, The heating circuit (8) is covered with heat-insulating material.

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