Digital strip steel annealing furnace thermal management system

Abstract

The invention discloses a digital strip steel annealing furnace thermal management system, and relates to the technical field of annealing furnace thermal management, the digital strip steel annealing furnace thermal management system comprises an annealing furnace, a temperature detection module and a temperature compensation module, the temperature detection module is used for detecting the internal temperature of the annealing furnace, and the temperature compensation module is connected with the temperature detection module through a signal line; the internal temperature of the annealing furnace is compensated according to a detection result of the temperature detection module, a temperature compensation module is mounted on the upper side of the outer wall of the annealing furnace, and a temperature detection module is mounted on the front side of the outer wall of the annealing furnace. By installing the temperature compensation module, the function of accurately compensating the internal temperature of the annealing furnace is achieved, the problems that a temperature field is uneven, temperature compensation is not timely and energy consumption is large are solved, the temperature compensation path can be automatically adjusted, the transverse temperature difference in the annealing furnace is reduced, and the requirement for repeated heating due to uneven local temperature is reduced; the energy consumption is reduced, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of annealing furnace thermal management, in particular to a digital thermal management system for a strip steel annealing furnace. Background Art

[0002] Early annealing furnaces relied primarily on manual operation or PID control algorithms. These were sensitive to temperature fluctuations and susceptible to noise interference, resulting in poor strip heating uniformity and affecting the material's physical properties. As the steel industry transitions to "self-sensing, self-determining" smart factories, annealing furnaces are required to implement unmanned operation and multi-objective optimization control. This requires integrating data-driven models to improve control response speed. To achieve the "dual carbon" goals, annealing furnaces need to optimize combustion efficiency, reduce nitrogen oxide and carbon dioxide emissions, and increase waste heat recovery. In a high-temperature environment, thermocouples and infrared temperature measuring devices will be affected by the high-temperature environment, resulting in untimely temperature feedback. At the same time, due to the uneven arrangement of the material pile in the annealing furnace, uneven distribution of the protective gas or unreasonable layout of the heating elements, the temperature of the local area deviates from the set value, requiring frequent compensation, but the compensation effect is not good and energy consumption is increased.

[0003] Patent CN104962727B discloses a temperature control system and method for the heating section of a continuous annealing furnace. The above patent implements a temperature control system and method for the heating section of a continuous annealing furnace.

[0004] The above patent monitors the working conditions in the annealing furnace in real time through basic automation equipment, and continuously sends the working condition information in the form of messages to the process control equipment. In addition, the production line status information of the strip steel during production on the production line is monitored through the production process execution management equipment, and continuously sends the production line status information in the form of messages to the process control equipment. On the one hand, the process control equipment can monitor the working conditions of the annealing furnace under all working conditions, and on the other hand, it can specifically monitor the conditions during strip steel production. There is room for optimization in the temperature compensation inside the strip steel annealing furnace.

[0005] To this end, the present application proposes a digital strip annealing furnace thermal management system that accurately compensates the internal temperature of the annealing furnace. Summary of the Invention

[0006] The object of the present invention is to provide a digital thermal management system for a strip annealing furnace to solve the technical problem of temperature compensation inside a strip annealing furnace proposed in the above background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions: a digital thermal management system for a strip steel annealing furnace, comprising an annealing furnace, a temperature detection module, and a temperature compensation module, wherein the temperature detection module is used to detect the internal temperature of the annealing furnace, and the temperature compensation module is connected to the temperature detection module via a signal line and compensates the internal temperature of the annealing furnace according to the detection result of the temperature detection module; A temperature compensation module is installed on the upper side of the outer wall of the annealing furnace, and a temperature detection module is installed on the front side of the outer wall of the annealing furnace; The temperature compensation module includes: a first slide rail, a first pulley, a compensation port, a fuel tank and a compensation motor, the first pulley is connected to the temperature compensation module via a signal line, and the compensation port is connected to the fuel tank via a pipeline; A first slide rail is installed on the upper side of the outer wall of the annealing furnace, a first pulley is installed on the upper side of the outer wall of the first slide rail, a compensation port is installed on the upper side of the outer wall of the annealing furnace, a fuel tank is installed on the rear side of the outer wall of the annealing furnace, and a compensation motor is installed on the right side of the outer wall of the fuel tank.

[0008] Preferably, the temperature compensation module further includes a wind power component, which includes: a wind valve, a fan, a rotating shaft and an air outlet, the wind valve is connected to the data processing unit through a signal line, and the fan is connected to the compensation motor through a connecting shaft; The wind power component drives the fan to rotate through the compensation motor. After receiving the signal transmitted by the data processing unit, the air valve connects the annealing furnace and the air outlet. The compensation motor drives the rotating shaft to rotate, so that the air outlet provides uniform wind force into the annealing furnace. An air vent is installed at the middle of the inner wall of the annealing furnace, a rotating shaft is installed at the rear side of the outer wall of the air vent, an air valve is installed at the rear side of the outer wall of the rotating shaft, and a fan is installed at the rear side of the outer wall of the air valve.

[0009] Preferably, the temperature detection module includes: a data processing unit, a mobile galvanic couple and an infrared sensor, the mobile galvanic couple and the infrared sensor are connected to the data processing unit via a signal line, the data processing unit receives the temperature information transmitted by the infrared sensor, analyzes it, and controls the mobile galvanic couple to move to the temperature abnormality area for detection when a temperature abnormality occurs, and transmits the information to the data processing unit; A mobile galvanic couple is installed on the front side of the outer wall of the annealing furnace, an infrared sensor is installed on the lower side of the outer wall of the mobile galvanic couple, and a data processing unit is installed on the right side of the outer wall of the infrared sensor.

[0010] Preferably, the air valve is connected to the heat component through a pipeline. After the processing is completed, the wind component cuts off the connection between the compensation port and the fuel tank and connects the heat component to the air port. The heat component processes the high-temperature exhaust gas in the annealing furnace. The heat component includes: heat exchange tubes, water tanks, water pumps, conversion units and energy storage chambers. A water pump is installed inside the water tank and connected to the heat exchange tubes. The heat exchange tubes provide heat to the annealing furnace through heat exchange. The conversion unit converts the heat energy of high-temperature exhaust gas into electrical energy and stores it in the energy storage chamber. The energy storage chamber is connected to the compensation port through a signal line. A water tank is installed on the rear side of the outer wall of the annealing furnace, an energy storage chamber is installed on the right side of the outer wall of the water tank, a conversion unit is installed on the upper side of the outer wall of the energy storage chamber, a water pump is installed on the upper part of the inner wall of the water tank, and a heat exchange tube is installed on the lower part of the inner wall of the annealing furnace.

[0011] Preferably, a purification module is installed on the upper side of the outer wall of the air valve. The purification module is used to process the exhaust gas processed by the heat exchange component. The purification module includes: a purification unit, a detection unit and a replenishing unit. After the purification unit removes impurities from the exhaust gas, the replenishing unit replenishes nitrogen and hydrogen into the exhaust gas after the exhaust gas passes the detection unit. The treated exhaust gas is heated by the heat exchange tube and then passed into the annealing furnace for gas replenishment. The purification unit includes an activated carbon adsorption chamber, a spray tower, a membrane separation device and a PSA device. Impurities in the exhaust gas are removed through the activated carbon adsorption chamber and the spray tower. The membrane separation device and the PSA device compare the hydrogen content in the exhaust gas with the preset value based on the detection results of the exhaust gas composition during the treatment process of the purification unit. When the hydrogen content exceeds 20%, the hydrogen in the exhaust gas is separated and transported into the hydrogen storage tank.

[0012] Preferably, the compensation port includes: a regulating valve and an igniter, the regulating valve is used to adjust the fuel gas flow of the compensation port, and the igniter is connected to the energy storage chamber through a signal line.

[0013] Preferably, the mobile thermocouple comprises: a second slide rail, a second pulley, a thermocouple and a telescopic rod, the second pulley and the second telescopic rod are connected to the compensation motor via a connecting shaft, and the thermocouple is connected to the data processing unit via a signal line; A second slide rail is installed on the front side of the outer wall of the annealing furnace, a second pulley is installed on the front side of the outer wall of the second slide rail, a thermocouple is installed in the middle of the inner wall of the annealing furnace, and a telescopic rod is installed on the front side of the outer wall of the thermocouple.

[0014] Preferably, the telescopic rod includes: a screw, a worm, a worm gear, a first valve, a second valve and a sealing ring; A screw is installed on the front side of the outer wall of the thermocouple, a worm is installed in the middle of the outer wall of the screw, a worm wheel is installed on the left side of the outer wall of the worm, a first valve is installed on the left side of the outer wall of the worm wheel, a sealing ring is installed on the upper side of the outer wall of the worm, and a second valve is installed on the lower side of the outer wall of the worm.

[0015] Preferably, the detection unit includes an oxygen analyzer and a dew point meter, which are used to detect the exhaust gas composition and the oxygen and hydrogen concentrations in the annealing furnace. During the exhaust gas treatment process in the purification unit, the hydrogen and nitrogen content in the exhaust gas is detected and the information is transmitted to the data processing unit. After the exhaust gas treatment is completed, the exhaust gas component content is detected and the information is transmitted to the data processing unit. Before the exhaust gas is replenished into the annealing furnace, the oxygen and hydrogen concentrations in the annealing furnace are detected and the information is transmitted to the data processing unit.

[0016] Preferably, the replenishing unit includes a hydrogen storage tank, a nitrogen storage tank, a gas valve and a mass flow meter, which is used to dynamically add hydrogen and nitrogen to the purified exhaust gas. During the process of replenishing hydrogen and nitrogen to the exhaust gas, the data processing unit monitors the amount of added hydrogen and nitrogen through the mass flow meter based on the detection results of the exhaust gas components by the detection unit.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention achieves the function of accurately compensating the internal temperature of the annealing furnace by installing a temperature compensation module, solving the problems of uneven temperature field, untimely temperature compensation and high energy consumption. It can independently adjust the temperature compensation path, reduce the lateral temperature difference in the annealing furnace, reduce the need for repeated heating due to local temperature unevenness, reduce energy consumption, and extend the service life of the equipment; 2. The present invention realizes the function of adaptive temperature monitoring by installing a temperature detection module, solves the problems of temperature detection blind spots, high temperature interference detection accuracy and short equipment service life, can reduce the time of troubleshooting temperature anomalies, extend the service life of the equipment, improve the accuracy of temperature detection, and improve the processing effect of the annealing furnace; 3. The present invention, by installing a wind power component and a heat component, realizes the function of recycling waste heat from high-temperature exhaust gas, solving the problems of high environmental pressure, waste of waste heat resources and short equipment life. It can reduce the corrosion and thermal stress damage of high-temperature exhaust gas to equipment, avoid the temperature difference between the upper and lower surfaces of the steel strip, improve the utilization rate of waste heat, and reduce energy consumption. 4. The present invention achieves the function of reducing fresh gas consumption by installing wind power components, heat exchange tubes and purification modules, solves the problems of large waste gas emissions, scratches on the strip surface, furnace corrosion and high costs, can recycle incompletely reacted gases, reduces production costs, reduces waste gas emissions, and reduces equipment maintenance frequency and failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 It is a side structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the wind power assembly structure of the present invention; Figure 4 This is a schematic diagram of the heat module structure of the present invention; Figure 5 It is a schematic diagram of the mobile galvanic couple structure of the present invention; Figure 6 It is a schematic diagram of the telescopic rod structure of the present invention; Figure 7 It is a schematic diagram of the thermal management system of the present invention; Figure 8 Schematic diagram of the working principle of the thermal management system of the present invention.

[0019] In the figure: 1. Annealing furnace; 2. First slide rail; 3. First pulley; 4. Compensation port; 5. Mobile thermocouple; 6. Infrared sensor; 7. Purification module; 8. Fuel tank; 9. Compensation motor; 10. Air valve; 11. Fan; 12. Rotating shaft; 13. Air outlet; 14. Heat exchange tube; 15. Water tank; 16. Water pump; 17. Conversion unit; 18. Energy storage chamber; 19. Control valve; 20. Igniter; 21. Second slide rail; 22. Second pulley; 23. Thermocouple; 24. Telescopic rod; 25. Screw; 26. Worm; 27. Worm gear; 28. First valve; 29. Second valve; 30. Sealing ring. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0023] Example 1: Please refer to Figure 1 、 Figure 2 and Figure 3 A digital thermal management system for a strip steel annealing furnace includes an annealing furnace 1, a temperature detection module, and a temperature compensation module. The temperature detection module is used to detect the internal temperature of the annealing furnace 1. The temperature compensation module is connected to the temperature detection module via a signal line and compensates the internal temperature of the annealing furnace 1 according to the detection result of the temperature detection module. A temperature compensation module is installed on the upper side of the outer wall of the annealing furnace 1, and a temperature detection module is installed on the front side of the outer wall of the annealing furnace 1; The temperature compensation module includes: a first slide rail 2, a first pulley 3, a compensation port 4, a fuel tank 8 and a compensation motor 9. The first pulley 3 is connected to the temperature compensation module via a signal line, and the compensation port 4 is connected to the fuel tank 8 via a pipeline. A first slide rail 2 is installed on the upper side of the outer wall of the annealing furnace 1, a first pulley 3 is installed on the upper side of the outer wall of the first slide rail 2, a compensation port 4 is installed on the upper side of the outer wall of the annealing furnace 1, a fuel tank 8 is installed on the rear side of the outer wall of the annealing furnace 1, and a compensation motor 9 is installed on the right side of the outer wall of the fuel tank 8; The temperature compensation module also includes a wind power component, which includes: a wind valve 10, a fan 11, a rotating shaft 12 and an air outlet 13. The wind valve 10 is connected to the data processing unit through a signal line, and the fan 11 is connected to the compensation motor 9 through a connecting shaft; The wind power component drives the fan 11 to rotate through the compensation motor 9. After receiving the signal transmitted by the data processing unit, the air valve 10 connects the annealing furnace 1 and the air outlet 13. The compensation motor 9 drives the rotating shaft 12 to rotate, so that the air outlet 13 provides uniform wind force into the annealing furnace 1. An air vent 13 is installed in the middle of the inner wall of the annealing furnace 1, a rotating shaft 12 is installed on the rear side of the outer wall of the air vent 13, an air valve 10 is installed on the rear side of the outer wall of the rotating shaft 12, and a fan 11 is installed on the rear side of the outer wall of the air valve 10; The temperature detection module includes: a data processing unit, a mobile galvanic couple 5 and an infrared sensor 6. The mobile galvanic couple 5 and the infrared sensor 6 are connected to the data processing unit via a signal line. After receiving the temperature information transmitted by the infrared sensor 6, the data processing unit analyzes it. When a temperature anomaly occurs, the mobile galvanic couple 5 is controlled to move to the position of the temperature anomaly area for detection, and the information is transmitted to the data processing unit. A mobile galvanic couple 5 is installed on the front side of the outer wall of the annealing furnace 1, an infrared sensor 6 is installed on the lower side of the outer wall of the mobile galvanic couple 5, and a data processing unit is installed on the right side of the outer wall of the infrared sensor 6; The compensation port 4 includes: a regulating valve 19 and a pilot burner 20. The regulating valve 19 is used to adjust the fuel gas flow of the compensation port 4. The pilot burner 20 is connected to the energy storage chamber 18 through a signal line. Furthermore, after the temperature detection module transmits the position requiring temperature compensation and the temperature deviation value to the temperature compensation module, the data processing unit controls the compensation motor 9 to drive the first pulley 3 to slide on the first slide rail 2, and drives the compensation port 4 to move to the position requiring temperature compensation. The regulating valve 19 connects the compensation port 4 and the fuel tank 8, and provides energy to the igniter 20 through the energy storage chamber 18 to ignite the fuel in the fuel tank 8. At the same time, the data processing controls the compensation motor 9 to drive the fan 11 to rotate, and the air valve 10 connects the fan 11 and the air outlet 13. The compensation motor 9 drives the rotating shaft 12 to rotate, and turns the air outlet 13 to the position requiring temperature compensation. The heat compensated by the compensation port 4 is evenly dispersed, and the internal temperature of the annealing furnace 1 can be dynamically adjusted according to the temperature information transmitted by the temperature difference detection module. When temperature compensation is not needed, the temperature information transmitted by the temperature detection module can be used to move itself to the low-temperature area to avoid the influence of high temperature on its own performance, thereby realizing the function of accurately compensating the internal temperature of the annealing furnace 1, solving the problems of uneven temperature field, untimely temperature compensation and high energy consumption, and being able to independently adjust the temperature compensation path, thereby reducing the lateral temperature difference in the annealing furnace 1, reducing the need for repeated heating due to local temperature unevenness, reducing energy consumption, and extending the service life of the equipment.

[0024] Example 2: Please refer to Figure 1 、 Figure 2 、 Figure 5 and Figure 6 A digital thermal management system for a strip annealing furnace, wherein the temperature detection module comprises: a data processing unit, a mobile galvanic couple 5, and an infrared sensor 6. The mobile galvanic couple 5 and the infrared sensor 6 are connected to the data processing unit via a signal line. The data processing unit receives and analyzes the temperature information transmitted by the infrared sensor 6. When a temperature anomaly occurs, the mobile galvanic couple 5 is controlled to move to a temperature anomaly area for detection, and the information is transmitted to the data processing unit. A mobile galvanic couple 5 is installed on the front side of the outer wall of the annealing furnace 1, an infrared sensor 6 is installed on the lower side of the outer wall of the mobile galvanic couple 5, and a data processing unit is installed on the right side of the outer wall of the infrared sensor 6; The mobile thermocouple 5 includes: a second slide rail 21, a second pulley 22, a thermocouple 23 and a telescopic rod 24, the second pulley 22 and the second telescopic rod 24 are connected to the compensation motor 9 through a connecting shaft, and the thermocouple 23 is connected to the data processing unit through a signal line; A second slide rail 21 is installed on the front side of the outer wall of the annealing furnace 1, a second pulley 22 is installed on the front side of the outer wall of the second slide rail 21, a thermocouple 23 is installed in the middle of the inner wall of the annealing furnace 1, and a telescopic rod 24 is installed on the front side of the outer wall of the thermocouple 23; The telescopic rod 24 includes: a screw 25, a worm 26, a worm gear 27, a first valve 28, a second valve 29 and a sealing ring 30; A screw 25 is installed on the front side of the outer wall of the thermocouple 23, a worm 26 is installed in the middle of the outer wall of the screw 25, a worm wheel 27 is installed on the left side of the outer wall of the worm 26, a first valve 28 is installed on the left side of the outer wall of the worm wheel 27, a sealing ring 30 is installed on the upper side of the outer wall of the worm 26, and a second valve 29 is installed on the lower side of the outer wall of the worm 26; Furthermore, during the processing of the annealing furnace 1, the temperature distribution of the annealing furnace 1 is collected by the infrared sensor 6, and the information is transmitted to the data processing unit. The data processing unit monitors the temperature in the annealing furnace 1 according to the received temperature distribution information. When a local temperature deviation occurs, the data processing unit controls the compensation motor 9 to drive the second pulley 22 to move on the second slide rail 21, and moves the thermocouple 23 and the telescopic rod 24 to the temperature deviation area. After arriving at the area, the compensation motor drives the telescopic rod 24 to move the thermocouple 23 deep into the area, and performs a detailed detection of the temperature distribution in the area. The information is transmitted to the data processing unit, and the data processing unit monitors the temperature in the annealing furnace 1 according to the received temperature distribution information. The temperature difference information is combined with the heat that the compensation port 4 can provide to calculate the opening and closing degree of the regulating valve 19 and the time for the compensation port 4 to perform temperature compensation. The service life of the conventional fixed thermocouple 23 is about 1 to 2 years. When there is no need to perform temperature detection on the temperature abnormality position, the telescopic rod 24 of the mobile thermocouple 5 is in a retracted state, which reduces the loss caused by long-term exposure to high temperature environment, realizes the function of adaptive temperature monitoring, solves the problems of temperature detection blind spot, high temperature interference detection accuracy and short equipment service life, can reduce the time for troubleshooting temperature abnormalities, extend the service life of the equipment, improve the accuracy of temperature detection, and improve the processing effect of the annealing furnace 1.

[0025] Example 3: Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4A digital thermal management system for a strip annealing furnace, wherein the temperature compensation module further comprises a wind power component, which comprises: a damper 10, a fan 11, a rotating shaft 12, and an air outlet 13. The damper 10 is connected to the data processing unit via a signal line, and the fan 11 is connected to the compensation motor 9 via a connecting shaft. The wind power component drives the fan 11 to rotate through the compensation motor 9. After receiving the signal transmitted by the data processing unit, the air valve 10 connects the annealing furnace 1 and the air outlet 13. The compensation motor 9 drives the rotating shaft 12 to rotate, so that the air outlet 13 provides uniform wind force into the annealing furnace 1. An air vent 13 is installed in the middle of the inner wall of the annealing furnace 1, a rotating shaft 12 is installed on the rear side of the outer wall of the air vent 13, an air valve 10 is installed on the rear side of the outer wall of the rotating shaft 12, and a fan 11 is installed on the rear side of the outer wall of the air valve 10; The air valve 10 is connected to the heat component through a pipeline. After the processing is completed, the wind component cuts off the connection between the compensation port 4 and the fuel tank 8 and connects the heat component to the air port 13. The heat component processes the high-temperature exhaust gas in the annealing furnace 1; The heat component includes: a heat exchange tube 14, a water tank 15, a water pump 16, a conversion unit 17 and an energy storage chamber 18. The water tank 15 is provided with a water pump 16 connected to the heat exchange tube 14. The heat exchange tube 14 provides heat to the annealing furnace 1 through heat exchange. The conversion unit 17 converts the heat energy of the high-temperature exhaust gas into electrical energy and stores it in the energy storage chamber 18. The energy storage chamber 18 is connected to the compensation port 4 through a signal line. A water tank 15 is installed on the rear side of the outer wall of the annealing furnace 1, an energy storage chamber 18 is installed on the right side of the outer wall of the water tank 15, a conversion unit 17 is installed on the upper side of the outer wall of the energy storage chamber 18, a water pump 16 is installed on the upper part of the inner wall of the water tank 18, and a heat exchange tube 14 is installed on the lower part of the inner wall of the annealing furnace 1; Furthermore, the high-temperature exhaust gas generated during the processing of the annealing furnace 1 passes through the air valve 10 to connect the vent 13 and the heat component, and the compensation motor 9 drives the fan 11 to rotate to generate suction, so as to absorb the high-temperature exhaust gas from the inside of the annealing furnace 1 into the heat component. After entering the heat component, the high-temperature exhaust gas passes through the heat exchange pipe 14 to absorb the heat in the high-temperature exhaust gas. The water pump 16 drives the cooling water in the water tank 15 to complete the cooling water circulation in the heat exchange pipe 14, thereby completing the heat absorption of the high-temperature exhaust gas. After the heat exchange is completed, the temperature of the high-temperature exhaust gas drops. The conversion unit 17 between the purification module 7 and the heat component has untreated high-temperature exhaust gas on one side and treated low-temperature exhaust gas on the other side. The heat exchange unit 17 uses the temperature difference to generate electricity and stores the electrical energy in the energy storage chamber 18. After absorbing the heat in the high-temperature exhaust gas, the heat exchange tube 14 transfers the heat to the water pipes, slides and other metal parts located at the bottom of the annealing furnace 1, reducing the continuous heat absorption and heat dissipation of these parts, and avoiding this process to lower the temperature of the lower surface of the strip during the processing of the annealing furnace 1, thereby forming a local low-temperature zone, realizing the function of recycling the waste heat of the high-temperature exhaust gas, solving the problems of high environmental pressure, waste of waste heat resources and short equipment service life, reducing the corrosion and thermal stress damage of the equipment by high-temperature exhaust gas, avoiding the temperature difference between the upper and lower surfaces of the strip, improving the utilization rate of waste heat and reducing energy consumption.

[0026] Example 4: Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 7 A digital thermal management system for a strip annealing furnace, wherein the air valve 10 is connected to the heat component via a pipeline. After the processing is completed, the wind component cuts off the connection between the compensation port 4 and the fuel tank 8 and connects the heat component to the air port 13. The heat component processes the high-temperature exhaust gas in the annealing furnace 1; The heat component includes: a heat exchange tube 14, a water tank 15, a water pump 16, a conversion unit 17 and an energy storage chamber 18. The water tank 15 is provided with a water pump 16 connected to the heat exchange tube 14. The heat exchange tube 14 provides heat to the annealing furnace 1 through heat exchange. The conversion unit 17 converts the heat energy of the high-temperature exhaust gas into electrical energy and stores it in the energy storage chamber 18. The energy storage chamber 18 is connected to the compensation port 4 through a signal line. A water tank 15 is installed on the rear side of the outer wall of the annealing furnace 1, an energy storage chamber 18 is installed on the right side of the outer wall of the water tank 15, a conversion unit 17 is installed on the upper side of the outer wall of the energy storage chamber 18, a water pump 16 is installed on the upper part of the inner wall of the water tank 18, and a heat exchange tube 14 is installed on the lower part of the inner wall of the annealing furnace 1; A purification module 7 is installed on the upper side of the outer wall of the air valve 10. The purification module 7 is used to process the exhaust gas processed by the heat exchange component. The purification module 7 includes: a purification unit, a detection unit and a replenishing unit. After the purification unit removes impurities in the exhaust gas, the replenishing unit replenishes nitrogen and hydrogen into the exhaust gas after the exhaust gas passes the detection unit. The treated exhaust gas is heated by the heat exchange tube 14 and then passed into the annealing furnace 1 for gas replenishment. The purification unit includes an activated carbon adsorption chamber, a spray tower, a membrane separation device, and a PSA device, which are used to remove impurities from the exhaust gas and separate and purify hydrogen and chlorine; The detection unit includes an oxygen analyzer and a dew point meter, which are used to detect the composition of the purified exhaust gas and the concentration of oxygen and hydrogen in the annealing furnace 1; The replenishment unit includes: a hydrogen storage tank, a nitrogen storage tank, a gas valve and a mass flow meter, which is used to dynamically add hydrogen and nitrogen to the purified exhaust gas; Furthermore, after the high-temperature exhaust gas is subjected to heat exchange treatment by the heat component, the temperature of the exhaust gas is lower when it enters the purification module 7. After the exhaust gas is treated by the activated carbon adsorption chamber, the spray tower, the membrane separation device and the PSA device, not only the impurities in the exhaust gas are removed during the treatment process, but also the residual hydrogen and nitrogen can be extracted and recycled and injected into the hydrogen storage tank and the nitrogen storage tank according to the content of hydrogen and nitrogen. When the hydrogen concentration is higher than 20%, the hydrogen is separated and recovered. When the hydrogen concentration is less than 5%, the hydrogen is not separated. The composition of the exhaust gas is detected by the oxygen analyzer and the dew point meter to ensure that the concentration of impurities such as oxygen and carbon in the exhaust gas is lower than the process threshold, so as to avoid destroying the reducing atmosphere in the annealing furnace 1 or initiating oxidation of the oxidizing material. The gas valve is opened by the replenishing unit. Gas is extracted from the hydrogen storage tank and the nitrogen storage tank to be supplemented into the purified exhaust gas. During the gas supplementation process, the amount of supplemented hydrogen and nitrogen is controlled by a mass flow meter. The ratio of hydrogen and nitrogen is dynamically adjusted according to the residual components in the treated exhaust gas. After the gas supplementation is completed, the exhaust gas is heated to above 150°C through the heat exchange tube 14 and is re-supplied into the annealing furnace 1 to complete the gas replacement in the annealing furnace 1. This avoids direct injection of low-temperature exhaust gas into the annealing furnace 1, which causes local cooling of the furnace cavity of the annealing furnace 1. This realizes the function of reducing new gas consumption, solves the problems of large exhaust gas emissions, scratches on the strip surface, corrosion of the furnace body and high costs, can recover incompletely reacted gases, reduces production costs, reduces exhaust gas emissions, and reduces equipment maintenance frequency and failure rate.

[0027] Example 5: Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 7A digital thermal management system for a strip steel annealing furnace includes an annealing furnace 1, a temperature detection module, and a temperature compensation module. The temperature detection module is used to detect the internal temperature of the annealing furnace 1. The temperature compensation module is connected to the temperature detection module via a signal line and compensates the internal temperature of the annealing furnace 1 according to the detection result of the temperature detection module. A temperature compensation module is installed on the upper side of the outer wall of the annealing furnace 1, and a temperature detection module is installed on the front side of the outer wall of the annealing furnace 1; The temperature compensation module includes: a first slide rail 2, a first pulley 3, a compensation port 4, a fuel tank 8 and a compensation motor 9. The first pulley 3 is connected to the temperature compensation module via a signal line, and the compensation port 4 is connected to the fuel tank 8 via a pipeline. A first slide rail 2 is installed on the upper side of the outer wall of the annealing furnace 1, a first pulley 3 is installed on the upper side of the outer wall of the first slide rail 2, a compensation port 4 is installed on the upper side of the outer wall of the annealing furnace 1, a fuel tank 8 is installed on the rear side of the outer wall of the annealing furnace 1, and a compensation motor 9 is installed on the right side of the outer wall of the fuel tank 8; The temperature compensation module also includes a wind power component, which includes: a wind valve 10, a fan 11, a rotating shaft 12 and an air outlet 13. The wind valve 10 is connected to the data processing unit through a signal line, and the fan 11 is connected to the compensation motor 9 through a connecting shaft; The wind power component drives the fan 11 to rotate through the compensation motor 9. After receiving the signal transmitted by the data processing unit, the air valve 10 connects the annealing furnace 1 and the air outlet 13. The compensation motor 9 drives the rotating shaft 12 to rotate, so that the air outlet 13 provides uniform wind force into the annealing furnace 1. An air vent 13 is installed in the middle of the inner wall of the annealing furnace 1, a rotating shaft 12 is installed on the rear side of the outer wall of the air vent 13, an air valve 10 is installed on the rear side of the outer wall of the rotating shaft 12, and a fan 11 is installed on the rear side of the outer wall of the air valve 10; A purification module 7 is installed on the upper side of the outer wall of the air valve 10. The purification module 7 is used to process the exhaust gas processed by the heat exchange component. The purification module 7 includes: a purification unit, a detection unit and a replenishing unit. After the purification unit removes impurities in the exhaust gas, the replenishing unit replenishes nitrogen and hydrogen into the exhaust gas after the exhaust gas passes the detection unit. The treated exhaust gas is heated by the heat exchange tube 14 and then passed into the annealing furnace 1 for gas replenishment. The purification unit includes an activated carbon adsorption chamber, a spray tower, a membrane separation device, and a PSA device, which are used to remove impurities from the exhaust gas and separate and purify hydrogen and chlorine; The detection unit includes an oxygen analyzer and a dew point meter, which are used to detect the composition of the purified exhaust gas and the concentration of oxygen and hydrogen in the annealing furnace 1; The replenishment unit includes: a hydrogen storage tank, a nitrogen storage tank, a gas valve and a mass flow meter, which is used to dynamically add hydrogen and nitrogen to the purified exhaust gas; Furthermore, after the purification module 7 has finished processing the exhaust gas and injected the exhaust gas into the annealing furnace 1, the data processing unit controls the compensation motor 9 to drive the first pulley 3 to move the compensation port 4 to the exhaust gas injection position to perform temperature compensation on the exhaust gas to avoid insufficient heating of the exhaust gas by the heat component, resulting in a sudden drop in the local temperature inside the annealing furnace 1. The data processing unit controls the support motor 9 to drive the fan 11 to rotate, and the air valve 10 connects the fan 11 and the air port 13 to evenly disperse the exhaust gas injected into the annealing furnace 1 inside the annealing furnace 1, avoiding local accumulation of gas in the annealing furnace 1, reducing the risk of material oxidation or incomplete combustion, and at the same time increasing the contact area between the exhaust gas and the furnace cavity thermal field, accelerating heat transfer, and reducing temperature gradients.

[0028] Working principle: During the processing of the annealing furnace 1, the temperature distribution of the annealing furnace 1 is collected by the infrared sensor 6, and the information is transmitted to the data processing unit. The data processing unit monitors the temperature in the annealing furnace 1 according to the received temperature distribution information. When a local temperature deviation occurs, the data processing unit controls the compensation motor 9 to drive the second pulley 22 to move on the second slide rail 21, and moves the thermocouple 23 and the telescopic rod 24 to the temperature deviation area. After arriving at the area, the compensation motor drives the telescopic rod 24 to move the thermocouple 23 deeper into the area, and performs a detailed detection of the temperature distribution in the area, and transmits the information to the data processing unit. The data processing unit calculates the opening and closing degree of the regulating valve 19 and the time for the compensation port 4 to perform temperature compensation based on the received temperature difference information and the heat that the compensation port 4 can provide. The service life of a conventional fixed thermocouple 23 is about 1 to 2 years. When there is no need to perform temperature detection on the temperature abnormality position, the telescopic rod 24 of the mobile thermocouple 5 is in a retracted state, which reduces the loss caused by long-term exposure to high temperature environment. After the temperature detection module transmits the position requiring temperature compensation and the temperature deviation value to the temperature compensation module, the data processing unit controls the compensation motor 9 to drive the first pulley 3 to slide on the first slide rail 2, and drives the compensation port 4 to move to the position requiring temperature compensation. The regulating valve 19 connects the compensation port 4 and the fuel tank 8, and provides energy to the igniter 20 through the energy storage chamber 18 to ignite the fuel in the fuel tank 8. At the same time, the data processing controls the compensation motor 9 to drive the fan 11 to rotate, and the air valve 10 connects the fan 11 and the air port 13. The compensation motor 9 drives the rotating shaft 12 to rotate, and turns the air port 13 to the position requiring temperature compensation, and evenly disperses the heat compensated by the compensation port 4. The internal temperature of the annealing furnace 1 can be dynamically adjusted according to the temperature information transmitted by the temperature difference detection module. When temperature compensation is not required, the temperature information transmitted by the temperature detection module can be used to move itself to the low temperature area to avoid the influence of high temperature on its own performance. The high-temperature exhaust gas generated during the processing of the annealing furnace 1 passes through the air valve 10 connecting the vent 13 and the heat component. The compensation motor 9 drives the fan 11 to rotate to generate suction, and the high-temperature exhaust gas is absorbed from the inside of the annealing furnace 1 into the heat component. After entering the heat component, the high-temperature exhaust gas absorbs the heat in the high-temperature exhaust gas through the heat exchange pipe 14. The water pump 16 drives the cooling water in the water tank 15 to complete the cooling water circulation in the heat exchange pipe 14, thereby completing the heat absorption of the high-temperature exhaust gas. After the heat exchange is completed, the temperature of the high-temperature exhaust gas drops. The conversion unit 17 located between the purification module 7 and the heat component has untreated high-temperature exhaust gas on one side and treated low-temperature exhaust gas on the other side. The conversion unit 17 uses the temperature difference to generate electricity and stores the electrical energy in the energy storage chamber 18. After absorbing the heat in the high-temperature exhaust gas, the heat exchange pipe 14 transfers the heat to the water pipes, slides and other metal components located at the bottom of the annealing furnace 1, reducing the continuous heat absorption and heat dissipation of these components, thereby preventing this process from lowering the temperature of the lower surface of the strip during the processing of the annealing furnace 1, thereby forming a local low-temperature zone; After the high-temperature exhaust gas is heat-exchanged by the heat component, the temperature of the exhaust gas is relatively low when it enters the purification module 7. After the exhaust gas is treated by the activated carbon adsorption chamber, the spray tower, the membrane separation device and the PSA device, the components of the exhaust gas are detected by the oxygen analyzer and the dew point meter to ensure that the concentration of impurities such as oxygen and carbon monoxide in the exhaust gas is lower than the process threshold, so as to avoid destroying the reducing atmosphere in the annealing furnace 1 or inducing oxidation of the material. The gas valve is opened by the replenishment unit to extract gas from the hydrogen storage tank and the nitrogen storage tank to replenish the purified exhaust gas. During the gas replenishment process, the amount of replenished hydrogen and nitrogen is controlled by the mass flow meter. The ratio of hydrogen and nitrogen is dynamically adjusted according to the residual components in the treated exhaust gas. The exhaust gas after gas replenishment passes through the heat exchange pipe 14 The exhaust gas is heated to above 150°C and replenished into the annealing furnace 1 to complete the gas replacement in the annealing furnace 1, avoiding the direct injection of low-temperature exhaust gas into the annealing furnace 1, which causes local cooling of the furnace cavity of the annealing furnace 1. After the purification module 7 has completed the exhaust gas treatment and injected the exhaust gas into the annealing furnace 1, the data processing unit controls the compensation motor 9 to drive the first pulley 3 to move the compensation port 4 to the exhaust gas injection position to perform temperature compensation on the exhaust gas, avoiding insufficient heating of the exhaust gas by the heat component, which causes a sudden drop in the local temperature inside the annealing furnace 1. The data processing unit controls the support motor 9 to drive the fan 11 to rotate, and the air valve 10 connects the fan 11 and the air port 13 to evenly disperse the exhaust gas injected into the annealing furnace 1 inside the annealing furnace 1 to avoid local accumulation of gas in the annealing furnace 1.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A digital thermal management system for a strip steel annealing furnace, comprising an annealing furnace (1), a temperature detection module and a temperature compensation module, characterized in that: The temperature detection module is used to detect the internal temperature of the annealing furnace (1); the temperature compensation module is connected to the temperature detection module via a signal line, and compensates the internal temperature of the annealing furnace (1) according to the detection result of the temperature detection module; A temperature compensation module is installed on the upper side of the outer wall of the annealing furnace (1), and a temperature detection module is installed on the front side of the outer wall of the annealing furnace (1); The temperature compensation module comprises: a first slide rail (2), a first pulley (3), a compensation port (4), a fuel tank (8) and a compensation motor (9); the first pulley (3) is connected to the temperature compensation module via a signal line, and the compensation port (4) is connected to the fuel tank (8) via a pipeline; A first slide rail (2) is installed on the upper side of the outer wall of the annealing furnace (1), a first pulley (3) is installed on the upper side of the outer wall of the first slide rail (2), a compensation port (4) is installed on the upper side of the outer wall of the annealing furnace (1), a fuel tank (8) is installed on the rear side of the outer wall of the annealing furnace (1), and a compensation motor (9) is installed on the right side of the outer wall of the fuel tank (8).

2. A digital thermal management system for a strip annealing furnace according to claim 1, characterized in that: The temperature compensation module further includes a wind power component, which includes: a wind valve (10), a fan (11), a rotating shaft (12) and an air outlet (13); the wind valve (10) is connected to the data processing unit via a signal line, and the fan (11) is connected to the compensation motor (9) via a connecting shaft; The wind power component drives the fan (11) to rotate through the compensation motor (9). After receiving the signal transmitted by the data processing unit, the air valve (10) connects the annealing furnace (1) and the air outlet (13). The compensation motor (9) drives the rotating shaft (12) to rotate, so that the air outlet (13) provides uniform wind force into the annealing furnace (1). An air vent (13) is installed in the middle of the inner wall of the annealing furnace (1), a rotating shaft (12) is installed on the rear side of the outer wall of the air vent (13), an air valve (10) is installed on the rear side of the outer wall of the rotating shaft (12), and a fan (11) is installed on the rear side of the outer wall of the air valve (10).

3. The digital thermal management system for a strip annealing furnace according to claim 1, characterized in that: The temperature detection module comprises: a data processing unit, a mobile galvanic couple (5) and an infrared sensor (6); the mobile galvanic couple (5) and the infrared sensor (6) are connected to the data processing unit via a signal line; the data processing unit receives temperature information transmitted by the infrared sensor (6) and performs analysis; when a temperature anomaly occurs, the mobile galvanic couple (5) is controlled to move to a temperature anomaly region for detection, and the information is transmitted to the data processing unit; A mobile galvanic couple (5) is installed on the front side of the outer wall of the annealing furnace (1), an infrared sensor (6) is installed on the lower side of the outer wall of the mobile galvanic couple (5), and a data processing unit is installed on the right side of the outer wall of the infrared sensor (6).

4. The digital thermal management system for a strip annealing furnace according to claim 2, characterized in that: The air valve (10) is connected to the heat component through a pipeline. After the processing is completed, the wind component cuts off the connection between the compensation port (4) and the fuel tank (8), and connects the heat component to the air port (13). The heat component processes the high-temperature exhaust gas in the annealing furnace (1); The heat component includes: a heat exchange tube (14), a water tank (15), a water pump (16), a conversion unit (17) and an energy storage chamber (18). The water tank (15) is provided with a water pump (16) connected to the heat exchange tube (14). The heat exchange tube (14) provides heat to the annealing furnace (1) through heat exchange. The conversion unit (17) converts the heat energy of the high-temperature exhaust gas into electrical energy and stores it in the energy storage chamber (18). The energy storage chamber (18) is connected to the compensation port (4) through a signal line. A water tank (15) is installed on the rear side of the outer wall of the annealing furnace (1), an energy storage chamber (18) is installed on the right side of the outer wall of the water tank (15), a conversion unit (17) is installed on the upper side of the outer wall of the energy storage chamber (18), a water pump (16) is installed on the upper part of the inner wall of the water tank (18), and a heat exchange tube (14) is installed on the lower part of the inner wall of the annealing furnace (1).

5. The digital thermal management system for a strip annealing furnace according to claim 2, characterized in that: A purification module (7) is installed on the upper side of the outer wall of the air valve (10). The purification module (7) is used to process the waste gas processed by the heat exchange component. The purification module (7) includes: a purification unit, a detection unit and a replenishing unit. After the purification unit removes impurities from the waste gas, the replenishing unit replenishes nitrogen and hydrogen into the waste gas after the waste gas passes the detection by the detection unit. The treated waste gas is heated by the heat exchange tube (14) and then introduced into the annealing furnace (1) for gas replenishment. The purification unit includes an activated carbon adsorption chamber, a spray tower, a membrane separation device and a PSA device. Impurities in the exhaust gas are removed through the activated carbon adsorption chamber and the spray tower. The membrane separation device and the PSA device compare the hydrogen content in the exhaust gas with the preset value based on the detection results of the exhaust gas composition during the treatment process of the purification unit. When the hydrogen content exceeds 20%, the hydrogen in the exhaust gas is separated and transported into the hydrogen storage tank.

6. The digital thermal management system for a strip annealing furnace according to claim 1, characterized in that: The compensation port (4) comprises a regulating valve (19) and an igniter (20), wherein the regulating valve (19) is used to regulate the fuel gas flow rate of the compensation port (4), and the igniter (20) is connected to the energy storage chamber (18) via a signal line.

7. The digital thermal management system for a strip annealing furnace according to claim 3, characterized in that: The mobile thermocouple (5) comprises: a second slide rail (21), a second pulley (22), a thermocouple (23) and a telescopic rod (24); the second pulley (22) and the second telescopic rod (24) are connected to the compensation motor (9) via a connecting shaft; and the thermocouple (23) is connected to the data processing unit via a signal line. A second slide rail (21) is installed on the front side of the outer wall of the annealing furnace (1), a second pulley (22) is installed on the front side of the outer wall of the second slide rail (21), a thermocouple (23) is installed in the middle of the inner wall of the annealing furnace (1), and a telescopic rod (24) is installed on the front side of the outer wall of the thermocouple (23).

8. The digital thermal management system for a strip annealing furnace according to claim 7, characterized in that: The telescopic rod (24) comprises: a screw (25), a worm (26), a worm wheel (27), a first valve (28), a second valve (29) and a sealing ring (30); A screw (25) is installed on the front side of the outer wall of the thermocouple (23), a worm (26) is installed in the middle of the outer wall of the screw (25), a worm wheel (27) is installed on the left side of the outer wall of the worm (26), a first valve (28) is installed on the left side of the outer wall of the worm wheel (27), a sealing ring (30) is installed on the upper side of the outer wall of the worm (26), and a second valve (29) is installed on the lower side of the outer wall of the worm (26).

9. The digital thermal management system for a strip annealing furnace according to claim 5, characterized in that: The detection unit includes an oxygen analyzer and a dew point meter, which are used to detect the exhaust gas composition and the oxygen and hydrogen concentrations in the annealing furnace (1). During the exhaust gas treatment process in the purification unit, the hydrogen and nitrogen contents in the exhaust gas are detected and the information is transmitted to the data processing unit. After the exhaust gas treatment is completed, the exhaust gas composition content is detected and the information is transmitted to the data processing unit. Before the exhaust gas is replenished and enters the annealing furnace (1), the oxygen and hydrogen concentrations in the annealing furnace (1) are detected and the information is transmitted to the data processing unit.

10. The digital thermal management system for a strip annealing furnace according to claim 5, characterized in that: The replenishing unit includes a hydrogen storage tank, a nitrogen storage tank, a gas valve and a mass flow meter, which is used to dynamically add hydrogen and nitrogen to the purified exhaust gas. During the process of replenishing hydrogen and nitrogen to the exhaust gas, the data processing unit monitors the amount of added hydrogen and nitrogen through the mass flow meter based on the detection results of the exhaust gas components by the detection unit.

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