Multi-gradient temperature field cooperative control steel ladle baking device and regulation and control method thereof

Abstract

The invention relates to the technical field of ferrous metallurgy equipment, in particular to a multi-gradient temperature field cooperative control steel ladle baking device and a regulation and control method thereof.The multi-gradient temperature field cooperative control steel ladle baking device comprises a steel ladle baking mechanism, the steel ladle baking mechanism comprises a base, a baking box is fixedly installed at the top of the base, and a burner body is fixedly installed on the baking box; a fuel supply pipe is fixedly installed at one end of the burner body, a flow regulator is arranged on the fuel supply pipe, a combustion-supporting air pipeline is installed on one side of the burner body, and an air volume regulator is fixedly arranged on the combustion-supporting air pipeline. Through the arrangement of the steel ladle baking mechanism, a temperature sensor can accurately monitor real-time temperature data of each layer, and when the collected temperature data deviates from a preset target temperature rise curve, a controller controls the opening degree of a flow regulator and an air volume regulator on a burner body corresponding to each layer; a multi-gradient temperature field adapting to the requirements of each layer is constructed, and the problem of local overheating or insufficient baking is avoided.

Description

Technical Field

[0001] This invention relates to a ladle baking device, and more particularly to a ladle baking device and its control method with multi-gradient temperature field coordinated control, belonging to the technical field of iron and steel metallurgical equipment. Background Technology

[0002] As the core equipment for holding and transferring high-temperature molten steel in the iron and steel metallurgical process, the steel ladle needs to be heated by a baking device before it is put into use to ensure that the steel ladle reaches the preset working temperature.

[0003] Existing ladle baking devices mostly use a single burner structure for baking. However, the heat transfer efficiency varies in different areas of the ladle lining. For example, the heat dissipation rate is different at the bottom, side walls and mouth of the ladle. A single temperature control cannot form a gradient temperature field that meets the needs of each area, which can easily lead to local overheating or insufficient baking of the ladle, causing cracks in the ladle lining due to excessive temperature difference. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a ladle baking device and its control method with multi-gradient temperature field coordinated control, which solves the problem that single temperature control can easily lead to local overheating or insufficient baking of the ladle.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: A ladle baking device involving multi-gradient temperature field collaborative control includes a ladle baking mechanism. The ladle baking mechanism includes a base, and a baking chamber is fixedly installed on the top of the base. The baking chamber is configured as a multi-layer structure, and several burner bodies are fixedly installed on the baking chamber. Each layer of the baking chamber has two burner bodies symmetrically arranged. A fuel supply pipe is fixedly installed at one end of each burner body, and a flow regulator is provided on the fuel supply pipe. A combustion air duct is installed on one side of each burner body, and an air volume regulator is fixedly installed on the combustion air duct. A cover plate is provided on the top of the baking chamber, and a support frame is fixedly installed at the bottom of the cover plate. Three temperature sensors are fixedly installed on the support frame, and the three temperature sensors are independently distributed in each layer of the baking chamber. A collaborative control system is provided on one side of the baking chamber. The baking chamber is used for baking ladles.

[0006] Furthermore, the collaborative control system includes a support base fixedly installed on the base, a touch panel on the support base, a controller on the touch panel, and the controller being electrically connected to the flow regulator, the air volume regulator, and the temperature sensor respectively.

[0007] Furthermore, the bottom of the baking oven is provided with an exhaust pipe, and a blower is installed below the baking oven via a fixed bracket. The exhaust pipe is fixedly connected to the blower. A waste heat exchanger is provided on one side of the blower, and a circulation pipeline connected to the waste heat exchanger is fixedly installed on one side of the baking oven.

[0008] Furthermore, the interior of the baking oven is provided with an insulation layer, which is made of high-temperature resistant ceramic fiber.

[0009] Furthermore, the temperature sensor is a type K thermocouple with a temperature measurement range of 0℃-1200℃.

[0010] Furthermore, the burner body is a flat flame burner, and its flame jet direction is perpendicular to the outer liner surface.

[0011] Furthermore, a first flange is fixedly installed at the output end of the induced draft fan and the output end of the waste heat exchanger, and a second flange is fixedly installed at the input end of the waste heat exchanger and the output end of the circulation pipeline. The adjacent first flange and second flange are fixedly connected by bolts.

[0012] Furthermore, two positioning rods are symmetrically fixedly installed on the surface of the second flange, and two positioning blocks are symmetrically fixedly installed on the surface of the first flange. The outer diameter of the end of the positioning rod is equal to the inner diameter of the positioning block.

[0013] Furthermore, the collaborative control system also includes an audible and visual alarm, which is disposed on the top of the support base and is electrically connected to the controller.

[0014] Furthermore, the control method for a ladle baking device with multi-gradient temperature field coordinated control includes the following steps: S1. Place it inside the baking oven, then fix the cover plate on the top of the baking oven, and insert the support bracket at the bottom of the cover plate along with the temperature sensor into the interior; S2. Connect the fuel supply pipe to the fuel storage tank and the combustion air pipe to the blower to provide fuel and combustion air to the burner body. Connect the burner body to the power supply and start it with the support base. Several burner bodies are distributed on each layer of the baking chamber for comprehensive baking. S3. The uo temperature sensors in the support frame are distributed in each layer to detect the real-time temperature data of each layer and transmit the data to the controller. The controller has preset target temperature rise curves for each area of ​​the lining. When the real-time temperature collected by the temperature sensor deviates significantly from the target temperature rise curve, the controller dynamically controls the opening of the flow regulator and the air volume regulator according to the real-time temperature deviation through the PID adjustment algorithm to achieve precise coordinated control of the multi-gradient temperature field. S4. Connect the induced draft fan to the exhaust pipe at the bottom of the baking chamber, start the induced draft fan to introduce the combustion exhaust gas into the waste heat exchanger, the exhaust gas exchanges heat in the waste heat exchanger, and the gas after heat exchange is transported to the combustion air pipeline through the circulation pipeline and delivered to the burner body to participate in combustion.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This application utilizes a ladle baking mechanism to create a multi-layered baking chamber, divided into multiple combustion units. Each layer houses a burner body for baking, and each burner body has its own independent fuel supply pipe and combustion air duct for supplying fuel and combustion air. Multiple temperature sensors, located at the bottom of the cover, are independently distributed across each layer of the baking chamber. When the burner body is activated for baking, each temperature sensor accurately monitors the real-time temperature data of each layer and transmits the collected temperature data to the collaborative control system. Based on preset target heating curves for each layer in the controller, when the collected temperature data deviates from the preset target heating curves, the controller adjusts the opening of the flow regulator and air volume regulator on the corresponding burner body for each layer. This adjusts the combustion parameters of the burner body, creating a multi-gradient temperature field adapted to the needs of each area, effectively avoiding localized overheating or insufficient baking, and improving baking quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a structural schematic diagram of the present invention from another perspective; Figure 3 This is a schematic diagram of the structure of the present invention from another perspective; Figure 4 This is a schematic diagram of the unfolded structure of the baking oven body and cover plate of the present invention; Figure 5 This is a schematic diagram of the internal structure of the baking oven of the present invention; Figure 6 This is a schematic diagram showing the separation of the induced draft fan and the waste heat exchanger in this invention; Figure 7 This is a schematic diagram showing the separation of the waste heat exchanger and circulation pipeline structure of the present invention.

[0017] In the diagram, 1. Ladle baking mechanism; 2. Base; 3. Baking chamber; 4. Burner body; 5. Fuel supply pipe; 6. Flow regulator; 7. Combustion air duct; 8. Air volume regulator; 9. Cover plate; 10. Support frame; 11. Temperature sensor; 12. Cooperative control system; 13. Support base; 14. Touch panel; 15. Controller; 16. Exhaust gas emission pipe; 17. Exhaust fan; 18. Waste heat exchanger; 19. Circulation pipeline; 20. Insulation layer; 21. First flange; 22. Second flange; 23. Bolt; 24. Positioning rod; 25. Positioning block; 26. Audible and visual alarm; 27. Ladle. Detailed Implementation

[0018] The technical solution of the present invention will be further described in a non-limiting manner below with reference to the accompanying drawings and specific embodiments.

[0019] Example 1: As Figures 1-7 As shown, the ladle baking device with multi-gradient temperature field collaborative control provided in this embodiment includes a ladle baking mechanism 1, which includes a base 2. A baking chamber 3 is fixedly installed on the top of the base 2. The baking chamber 3 is configured as a three-layer structure. Several burner bodies 4 are fixedly installed on the baking chamber 3, and two burner bodies 4 are symmetrically arranged on each layer of the baking chamber 3. A fuel supply pipe 5 is fixedly installed at one end of the burner body 4. A flow regulator 6 is provided on the fuel supply pipe 5. A combustion air duct 7 is installed on one side of the burner body 4. An air volume regulator 8 is fixedly installed on the combustion air duct 7. A cover plate 9 is provided on the top of the baking chamber 3. A support frame 10 is fixedly installed at the bottom of the cover plate 9. Three temperature sensors 11 are fixedly installed on the support frame 10. The three temperature sensors 11 are independently distributed in each layer of the baking chamber 3. A collaborative control system 12 is provided on one side of the baking chamber 3. A ladle 27 is provided inside the baking chamber 3.

[0020] In use, the above structure, through the setting of the ladle baking mechanism 1, sets the baking chamber 3 as a three-layer structure, divided into a bottom combustion unit, a middle combustion unit, and a top combustion unit. Each layer is equipped with a burner body 4 for baking the ladle 27, and each burner body 4 is independently equipped with a fuel supply pipe 5 and a combustion air pipe 7 for supplying fuel and combustion air. Three temperature sensors 11 are set at the bottom of the cover plate 9, each temperature sensor 11 being independently distributed in each layer of the baking chamber 3. When the burner body 4 is started to bake the ladle 27, each temperature sensor 11 can... The system accurately monitors the real-time temperature data of each layer of the ladle 27 and transmits the collected temperature data to the collaborative control system 12. Based on the preset target heating curves for each layer in the controller 15, when the collected temperature data deviates from the preset target heating curves, the controller 15 dynamically controls the opening of the flow regulator 6 and air volume regulator 8 on the corresponding burner body 4 of each layer through the PID adjustment algorithm to adjust the combustion parameters of the burner body 4, thereby constructing a multi-gradient temperature field that adapts to the needs of each area of ​​the ladle 27, effectively avoiding the problem of local overheating or insufficient baking, and improving the baking quality.

[0021] Specifically, the collaborative control system 12 includes a support base 13 fixedly installed on the base 2, a touch panel 14 on the support base 13, a controller 15 on the touch panel 14, and the controller 15 is electrically connected to the flow regulator 6, the air volume regulator 8 and the temperature sensor 11 respectively.

[0022] By setting the collaborative control system 12 as a combination of a touch panel 14 and a controller 15, the controller 15 adopts a PLC controller and is electrically connected to the flow regulator 6, the air volume regulator 8 and the temperature sensor 11, so that the controller 15 can automatically receive the data collected by the temperature sensor 11 and intelligently adjust the flow regulator 6 and the air volume regulator 8. At the same time, the operator can view the real-time temperature data and adjust the target parameters through the touch panel 14, so as to realize the precise collaborative control of the multi-gradient temperature field.

[0023] Furthermore, the bottom of the baking oven 3 is provided with an exhaust pipe 16, and the bottom of the baking oven 3 is provided with an induced draft fan 17 connected by a fixing bracket. The exhaust pipe 16 is fixedly connected to the induced draft fan 17. A waste heat exchanger 18 is provided on one side of the induced draft fan 17, and a circulation pipeline 19 connected to the waste heat exchanger 18 is fixedly installed on one side of the baking oven 3.

[0024] After the induced draft fan 17 is connected to the exhaust gas pipe 16, it can introduce the combustion exhaust gas generated in the baking box 3 into the waste heat exchanger 18. The waste heat exchanger 18 exchanges heat with the combustion exhaust gas. After the heat exchange, the gas is transported to the combustion air pipe 7 through the circulation pipe 19 and introduced into the burner body 4 to participate in combustion, effectively recovering the waste heat in the exhaust gas and reducing fuel consumption.

[0025] Furthermore, the interior of the baking oven 3 is provided with a heat insulation layer 20, which is made of high-temperature resistant ceramic fiber. The temperature sensor 11 is a K-type thermocouple with a temperature measurement range of 0℃-1200℃. The burner body 4 is preferably a flat flame burner, and its flame jet direction is perpendicular to the outer lining surface of the ladle 27.

[0026] The insulation layer 20 can effectively block heat from being transferred outwards and improve the insulation effect; the K-type thermocouple temperature sensor 11 has a wide temperature measurement range and high temperature resistance, which can meet the monitoring needs inside the ladle 27; at the same time, the burner body 4 of the flat flame burner can increase the flame contact area and improve the heat transfer efficiency.

[0027] Furthermore, a first flange 21 is fixedly installed at the output end of the induced draft fan 17 and the output end of the waste heat exchanger 18, and a second flange 22 is fixedly installed at the input end of the waste heat exchanger 18 and the output end of the circulation pipeline 19. The adjacent first flange 21 and second flange 22 are fixedly connected by bolts 23.

[0028] The waste heat exchanger 18 is installed and connected to the induced draft fan 17 and the circulation pipeline 19 by connecting the first flange 21 and the second flange 22 and fixing it with several bolts 23. This not only allows the waste heat exchanger 18 to be stably installed between the induced draft fan 17 and the circulation pipeline 19, but also makes it easy to disassemble the waste heat exchanger 18 from between the induced draft fan 17 and the circulation pipeline 19 after removing several bolts 23.

[0029] Furthermore, two positioning rods 24 are symmetrically fixedly installed on the surface of the second flange 22, and two positioning blocks 25 are symmetrically fixedly installed on the surface of the first flange 21. The outer diameter of the end of the positioning rod 24 is equal to the inner diameter of the positioning block 25.

[0030] The positioning rod 24 and positioning block 25 are used to position the first flange 21 and the second flange 22 during the installation of the waste heat exchanger 18. The waste heat exchanger 18 is inserted from the outside to the bottom of the baking oven 3, so that one end of the waste heat exchanger 18 is in contact with one end of the induced draft fan 17 and the other end of the waste heat exchanger 18 is in contact with one end of the circulation pipe 19. The positioning rod 24 is inserted into the positioning block 25 to position the first flange 21 and the second flange 22, so that the threaded holes on the first flange 21 and the second flange 22 can be aligned, which facilitates the installation of several bolts 23.

[0031] The collaborative control system 12 also includes an audible and visual alarm 26, which is fixedly installed on the top of the support base 13 and electrically connected to the controller 15. When an abnormal temperature deviation is detected, the controller 15 can control the audible and visual alarm 26 to start an alarm and remind the operator to deal with the abnormal situation in time.

[0032] Example 2: This example provides a control method for a ladle baking device with multi-gradient temperature field coordinated control, which is based on the ladle baking device with multi-gradient temperature field coordinated control in Example 1, and specifically includes the following steps: S1. Place the ladle 27 inside the baking oven 3, fix the cover plate 9 on the top of the baking oven 3, and insert the support frame 10 at the bottom of the cover plate 9 along with the temperature sensor 11 into the ladle 27. S2. Connect the fuel supply pipe 5 to the fuel storage tank and the combustion air pipe 7 to the blower to provide fuel and combustion air to the burner body 4. Connect the burner body 4 to the power supply and start it with the support base 13. Several burner bodies 4 are distributed on each layer of the baking box 3 to bake the ladle 27. S3. Multiple temperature sensors 11 in the support frame 10 are distributed in each layer of the ladle 27, corresponding to the detection of real-time temperature data of each layer of the ladle 27, and transmit the data to the controller 15. The controller 15 is preset with target temperature rise curves for each area of ​​the ladle 27 lining. When the real-time temperature collected by the temperature sensor 11 deviates significantly from the target temperature rise curve, the controller 15 dynamically controls the opening of the flow regulator 6 and the air volume regulator 8 through a PID adjustment algorithm based on the real-time temperature deviation, so as to achieve precise coordinated control of the multi-gradient temperature field. S4. Connect the induced draft fan 17 to the exhaust pipe 16 at the bottom of the baking chamber 3, start the induced draft fan 17 to introduce the combustion exhaust gas into the waste heat exchanger 18, the exhaust gas exchanges heat in the waste heat exchanger 18, and the gas after heat exchange is transported to the combustion air pipe 7 through the circulation pipe 19 and then transported to the burner body 4 to participate in combustion.

[0033] Based on the preferred embodiments of the present invention described above, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A ladle baking device with multi-gradient temperature field coordinated control, comprising a ladle baking mechanism (1), wherein the ladle baking mechanism (1) includes a base (2), and a baking chamber (3) is fixedly installed on the top of the base (2), characterized in that: The baking oven (3) is configured as a multi-layer structure, and several burner bodies (4) are fixedly installed on the baking oven (3), and each layer of the baking oven (3) is symmetrically provided with two burner bodies (4). A fuel supply pipe (5) is fixedly installed at one end of the burner body (4). A flow regulator (6) is provided on the fuel supply pipe (5). An auxiliary combustion air duct (7) is installed on one side of the burner body (4). An air volume regulator (8) is fixedly installed on the auxiliary combustion air duct (7). A cover plate (9) is provided on the top of the baking chamber (3), and a support frame (10) is fixedly installed at the bottom of the cover plate (9). Temperature sensors (11) are fixedly installed on the support frame (10) and are independently distributed in each layer of the baking chamber (3). A collaborative control system (12) is provided on one side of the baking chamber (3). The baking chamber (3) is used to bake the steel ladle (27).

2. The ladle baking device with multi-gradient temperature field coordinated control according to claim 1, characterized in that: The collaborative control system (12) includes a support base (13) fixedly installed on the base (2), a touch panel (14) is provided on the support base (13), a controller (15) is provided on the touch panel (14), and the controller (15) is electrically connected to the flow regulator (6), the air volume regulator (8) and the temperature sensor (11) respectively.

3. The ladle baking device with multi-gradient temperature field coordinated control according to claim 2, characterized in that: The bottom of the baking oven (3) is provided with an exhaust pipe (16), and a blower (17) is provided below the baking oven (3) by means of a fixed bracket. The exhaust pipe (16) is fixedly connected to the blower (17). A waste heat exchanger (18) is provided on one side of the blower (17), and a circulation pipeline (19) connected to the waste heat exchanger (18) is fixedly installed on one side of the baking oven (3).

4. The ladle baking device with multi-gradient temperature field coordinated control according to claim 1, characterized in that: The interior of the baking oven (3) is provided with a heat insulation layer (20) made of high-temperature resistant ceramic fiber.

5. The ladle baking device with multi-gradient temperature field coordinated control according to claim 1, characterized in that: The temperature sensor (11) is a K-type thermocouple with a temperature measurement range of 0℃-1200℃.

6. The ladle baking device with multi-gradient temperature field coordinated control according to claim 1, characterized in that: The burner body (4) is a flat flame burner, and its flame jet direction is perpendicular to the outer lining surface of the steel ladle (27).

7. The ladle baking apparatus with multi-gradient temperature field coordinated control according to claim 3, characterized in that: The output end of the induced draft fan (17) and the output end of the waste heat exchanger (18) are both fixedly installed with a first flange (21), and the input end of the waste heat exchanger (18) and the output end of the circulation pipeline (19) are both fixedly installed with a second flange (22). The adjacent first flange (21) and second flange (22) are fixedly connected by bolts (23).

8. The ladle baking apparatus with multi-gradient temperature field coordinated control according to claim 7, characterized in that: Two positioning rods (24) are symmetrically fixedly installed on the surface of the second flange (22), and two positioning blocks (25) are symmetrically fixedly installed on the surface of the first flange (21). The outer diameter of the end of the positioning rod (24) is equal to the inner diameter of the positioning block (25).

9. The ladle baking apparatus with multi-gradient temperature field coordinated control according to claim 2, characterized in that: The collaborative control system (12) also includes an audible and visual alarm (26), which is located on the top of the support base (13) and is electrically connected to the controller (15).

10. The control method of the ladle baking device with multi-gradient temperature field coordinated control according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Place the ladle (27) inside the baking oven (3), fix the cover plate (9) on the top of the baking oven (3), and insert the support frame (10) at the bottom of the cover plate (9) along with the temperature sensor (11) into the ladle (27). S2. Connect the fuel supply pipe (5) to the fuel storage tank and the combustion air pipe (7) to the blower to provide fuel and combustion air to the burner body (4). Connect the burner body (4) to the power supply and start it with the support base (13). Several burner bodies (4) are distributed on each layer of the baking box (3) to bake the ladle (27) thoroughly. S3. Multiple temperature sensors (11) in the support frame (10) are distributed in each layer of the ladle (27) to detect the real-time temperature data of each layer of the ladle (27) and transmit the data to the controller (15). The controller (15) has a preset target temperature rise curve for each area of ​​the ladle (27) lining. When the real-time temperature collected by the temperature sensor (11) deviates significantly from the target temperature rise curve, the controller (15) dynamically controls the opening of the flow regulator (6) and the air volume regulator (8) according to the real-time temperature deviation through the PID adjustment algorithm to achieve precise coordinated control of the multi-gradient temperature field. S4. Connect the induced draft fan (17) to the exhaust pipe (16) at the bottom of the baking box (3), start the induced draft fan (17) to introduce the combustion exhaust gas into the waste heat exchanger (18), the exhaust gas exchanges heat in the waste heat exchanger (18), and the gas after heat exchange is transported to the combustion air pipeline (7) through the circulation pipeline (19) and then transported to the burner body (4) to participate in combustion.

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