Automatic baking furnace system for pot-type calcining furnace

Abstract

The utility model discloses an automatic baking furnace system for a pot-type calcining furnace, which comprises the pot-type calcining furnace, a first-layer flame path is arranged in the pot-type calcining furnace, the automatic baking furnace can better follow a baking furnace curve to bake compared with a manual baking furnace, the baking furnace mass is higher than that of the manual baking furnace, and a flame-out protection valve and a thermal induction probe are matched for use, so that the automatic baking furnace system is more convenient to operate. When a flame gun of an oven flames out accidentally, the device can automatically close a natural gas source in an extremely short time, the major potential safety hazard of flame path explosion can be avoided, when the temperature is abnormal, an alarm in a duty room rings to remind a worker to deal with the situation, the situation that the worker on duty falls asleep to cause errors in the oven drying process is avoided, and the working efficiency is improved. The design of the oven curve and the flame-out protection flame gun is greatly improved, the energy-saving effect is very good, the labor intensity of workers can be greatly reduced, the workers do not need to frequently run to the oven to check basically, and the flame-out protection flame gun is provided with the flame-out prevention design, so that the flame is rarely flamed out even at low temperature.

Description

Technical Field

[0001] This utility model relates to the field of tank calcining furnace technology, specifically to an automated drying system for tank calcining furnaces. Background Technology

[0002] Currently, pot-type calcining furnaces are widely used in the aluminum anode and cathode material industry. These furnaces are large in size, with the core constructed of silica bricks (mainly composed of silicon dioxide) and the outer walls of red bricks. The spaces between the two are constructed of high-alumina bricks (mainly composed of alumina), insulating bricks, or clay bricks. Due to the significant differences in the thermal expansion coefficients of different building materials, especially silica bricks, which exhibit large differences in thermal expansion coefficients across different temperature ranges and can undergo sudden and drastic expansion due to high-temperature phase transitions, the start-up of the calcining furnace is very difficult and has a long cycle, typically around 60 days. The furnace drying process must be strictly carried out according to the furnace drying curve. Within the drying cycle, the temperature at each point in time is fixed, and the slowest temperature rise is only allowed to increase by about 6°C per shift.

[0003] Workers must continuously adjust the gas valve opening 24 hours a day based on the temperature display of each flue to ensure that the temperature of each flue matches the furnace drying curve. Given this, manual furnace drying is extremely labor-intensive, with workers operating in high-temperature environments during summer, making for harsh working conditions. Furthermore, manual furnace drying makes it difficult to guarantee a high degree of consistency between the real-time furnace temperature and the heating curve, and it's difficult to prevent furnace cracking due to errors, leading to irreparable defects. Safety during the drying process is also challenging, as the torch may sometimes extinguish in low-temperature zones; if not detected in time, this could result in an explosion, damaging the furnace or even injuring personnel. Therefore, we need to propose an automated furnace drying system for tank-type calcining furnaces. Summary of the Invention

[0004] The purpose of this utility model is to provide an automated furnace drying system for a tank-type calcining furnace, aiming to solve the defects of the existing manual furnace drying technology, which makes it difficult to ensure that the real-time furnace temperature matches the furnace heating curve, makes it difficult to prevent furnace cracking due to furnace drying errors, and makes it difficult to ensure the safety of the furnace drying process, because the flame gun may sometimes go out in the low temperature zone. If the on-duty personnel do not notice in time, an explosion may occur, which may damage the furnace or even injure the on-duty personnel.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] An automated drying system for a pot-type calcining furnace includes a pot-type calcining furnace. The pot-type calcining furnace has a first-layer fire channel inside. An upper-layer temperature measuring element is fixedly installed inside the first-layer fire channel. A lower-layer temperature measuring element is fixedly installed below the upper-layer temperature measuring element in the first-layer fire channel. A flameout protection flame gun is installed on one side of the pot-type calcining furnace. One end of the flameout protection flame gun is fixedly connected to a connecting pipe. One end of the connecting pipe is fixedly connected to a branch gas pipe. One end of the branch gas pipe is fixedly connected to a main gas pipe. A negative pressure fan is also fixedly connected to the pot-type calcining furnace via a pipeline.

[0007] Preferably, an electrically controlled gas valve is connected to the connecting pipe, and a control branch valve is connected to one side of the connecting pipe located on the electrically controlled gas valve.

[0008] Preferably, a bypass branch valve is connected to the outer wall of the connecting pipe via a pipeline, and a main shut-off valve is connected to the outer wall of the branch gas pipe.

[0009] Preferably, it also includes a control cabinet, wherein the upper temperature measuring element, the lower temperature measuring element and the electrically controlled gas valve are all electrically connected to the control cabinet via wires.

[0010] Preferably, the control cabinet is equipped with a control unit. The upper temperature measuring element and the lower temperature measuring element respectively include a first temperature measuring unit, a second temperature measuring unit and a third temperature measuring unit. The first temperature measuring unit, the second temperature measuring unit and the third temperature measuring unit are all electrically connected to the control unit through wires.

[0011] Preferably, it also includes an alarm, which is electrically connected to the control unit via a wire.

[0012] Preferably, the branch gas pipe is provided in several groups, and each of the several groups of branch gas pipes is connected to a first gas valve. The branch gas pipe is also connected to a second gas valve, the second gas valve is connected in series with the first gas valve, and a third gas valve is connected in parallel to the branch gas pipe through a pipe.

[0013] Preferably, one end of the branch gas pipe is fixedly connected to a gas hose, and one end of the gas hose is connected to one end of the flameout protection flame gun.

[0014] Preferably, the flameout protection flame gun includes a flame gun tube, one end of which is fixedly connected to a flameout protection valve, one end of which is connected to an air inlet, which is fixedly connected to one end of a gas hose via a connector, the other end of which is fixedly connected to a nozzle, the nozzle having a flame ball inside, one end of which is fixedly fitted with a flameout protection cover, and a thermal sensor probe installed on the top of the nozzle probe, with a sensing wire connected to the thermal sensor probe, one end of which is connected to the flameout protection valve.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This utility model's automatic furnace drying system can better follow the furnace drying curve than manual furnace drying, resulting in higher drying quality. By using a flameout protection valve and a thermal sensor, the device can automatically shut off the natural gas supply in a very short time when the furnace torch accidentally goes out, avoiding the major safety hazard of a flue explosion. When there is an abnormal temperature, the alarm in the duty room will sound to remind the staff to handle the situation, preventing errors in the furnace drying process caused by staff falling asleep. The furnace drying curve and the flameout protection flame torch design have been significantly improved, resulting in excellent energy-saving effects and greatly reducing the labor intensity of workers. Workers basically do not need to frequently run to the furnace to check. The flameout protection flame torch has an anti-flameout design, so it rarely goes out even at low temperatures.

[0017] 2. The main control system of this utility model can also use the main control system of the calcining furnace automatic temperature control for automatic furnace drying. Input the automatic furnace drying control program, and use the modified calcining furnace automatic temperature control system to control the furnace drying execution system. Under the control of the automatic temperature control main control cabinet, the furnace temperature is automatically increased according to a strict furnace drying curve. Attached Figure Description

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 This is a structural schematic diagram of the oven system layout of this utility model;

[0020] Figure 3 This is a schematic diagram of the flameout protection flame gun of this utility model.

[0021] In the diagram: 1. Tank-type calcining furnace; 2. First-layer fire channel; 3. Upper-layer temperature measuring element; 4. Lower-layer temperature measuring element; 5. Flameout protection flame gun; 6. Connecting pipe; 7. Branch gas pipe; 8. Main gas pipe; 9. Negative pressure fan; 10. Electrically controlled gas valve; 11. Control branch valve; 12. Bypass branch valve; 13. Main shut-off valve; 14. Control cabinet; 15. Control unit; 16. First temperature measuring unit; 17. Second temperature measuring unit; 18. Third temperature measuring unit; 19. Alarm; 20. First gas valve; 21. Second gas valve; 22. Third gas valve; 23. Gas hose; 24. Flame gun tube; 25. Flameout protection valve; 26. Air inlet; 27. Flame dropper; 28. Flameout protection cover; 29. ​​Thermal sensor; 30. Sensing wire; 31. Flame gun head. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-3 This utility model provides a technical solution:

[0024] An automated drying system for a pot-type calcining furnace includes a pot-type calcining furnace 1. The pot-type calcining furnace 1 has a first-layer fire channel 2 inside. An upper-layer temperature measuring element 3 is fixedly installed inside the first-layer fire channel 2. A lower-layer temperature measuring element 4 is fixedly installed below the upper-layer temperature measuring element 3 in the first-layer fire channel 2. A flameout protection flame gun 5 is installed on one side of the pot-type calcining furnace 1. One end of the flameout protection flame gun 5 is fixedly connected to a connecting pipe 6. One end of the connecting pipe 6 is fixedly connected to a branch gas pipe 7. One end of the branch gas pipe 7 is fixedly connected to a main gas pipe 8. The pot-type calcining furnace 1 is fixedly connected to... A negative pressure fan 9 is used. A flameout protection flame gun 5 is inserted at the starting point of the first layer fire channel 2 of the calcining furnace. The combustion air is drawn in by the negative pressure provided by the negative pressure fan 9 at the starting point of the first layer fire channel 2. The hot gas after combustion flows downward from top to bottom under the pull of the negative pressure fan 9. The main control system of this utility model can also use the main control system of the calcining furnace automatic temperature adjustment for automatic furnace drying. The automatic furnace drying control program is input, and the furnace drying execution system is controlled by the modified calcining furnace automatic temperature adjustment system. Under the control of the automatic temperature adjustment main control cabinet, the temperature is automatically increased according to a strict furnace drying curve.

[0025] An electrically controlled gas valve 10 is connected to the connecting pipe 6. A control branch valve 11 is connected to one side of the electrically controlled gas valve 10 on the connecting pipe 6. A bypass branch valve 12 is connected to the outer wall of the connecting pipe 6 through a pipe. A main shut-off valve 13 is connected to the outer wall of the branch gas pipe 7. A main gas pipe 8 is laid on the temperature regulating platform of the tank-type calcining furnace. There are multiple branch gas pipes 7 on the main gas pipe 8. A three-way connector is connected to the branch gas pipe 7 to divide the gas path into two paths. One path is equipped with the control branch valve 11 and the electrically controlled gas valve 10, and is connected to the flameout protection flame gun 5. The other gas path is a bypass gas path, equipped with a bypass branch valve 12. The purpose is to close the control branch valve 11 and use the size of the bypass branch valve 12 for emergency manual furnace drying if the electrically controlled gas valve 10 fails.

[0026] It also includes a control cabinet 14, and the upper temperature measuring element 3, the lower temperature measuring element 4 and the electrically controlled gas valve 10 are all electrically connected to the control cabinet 14 via wires;

[0027] The control cabinet 14 contains a control unit 15. The upper temperature sensing element 3 and the lower temperature sensing element 4 each include a first temperature sensing unit 16, a second temperature sensing unit 17, and a third temperature sensing unit 18. All three units are electrically connected to the control unit 15 via wires. The main control system collects temperature parameters from the temperature sensing elements of the corresponding fire channel and controls the jet output of the flameout protection flame gun 5 by adjusting the opening or pressure of the electrically controlled gas valve 10. The flameout protection flame gun 5 burns inside the fire channel to control the oven temperature of that channel. If multiple temperature sensing elements are present... When the measured real-time temperature is lower than the temperature required by the furnace baking curve, the electrically controlled gas valve 10 can increase the opening to increase the gas intake, or increase the gas intake by adjusting the pressure, so that the flame of the flameout protection flame gun 5 will be larger and the temperature will rise; conversely, if the temperature of the corresponding fire channel measured by the temperature sensing element is too high compared with the preset temperature of the furnace baking curve, the opening of the electrically controlled gas valve 10 will be reduced, or the pressure of the gas entering the flameout protection flame gun 5 will be reduced, reducing the gas intake and reducing the flame of the flameout protection flame gun 5 to lower the temperature; the execution unit is connected to the main gas pipe 8 through the valve and to the flameout protection flame gun 5 through the connecting hose;

[0028] It also includes an alarm 19, which is electrically connected to the control unit 15 via a wire. When there is an abnormal temperature, the alarm 19 in the duty room will sound to remind the staff to handle the situation and prevent the staff from falling asleep and causing errors in the oven baking process.

[0029] The branch gas pipe 7 is provided with several sets, and each set of branch gas pipe 7 is connected to a first gas valve 20. The branch gas pipe 7 is also connected to a second gas valve 21, which is connected in series with the first gas valve 20. A third gas valve 22 is connected in parallel to the branch gas pipe 7 through a pipe.

[0030] One end of the branch gas pipe 7 is fixedly connected to a gas hose 23, and one end of the gas hose 23 is connected to one end of the flameout protection flame gun 5. The furnace baking curve and the flameout protection flame gun design have been significantly improved, resulting in excellent energy-saving effects. This can greatly reduce the labor intensity of workers, and workers basically do not need to frequently run to the furnace to check. The flameout protection flame gun has an anti-flameout design, so it rarely goes out even at low temperatures.

[0031] The flameout protection flame gun 5 includes a flame gun tube 24. One end of the flame gun tube 24 is fixedly connected to a flameout protection valve 25, and one end of the flameout protection valve 25 is connected to an air inlet 26. The air inlet 26 is fixedly connected to one end of a gas hose 23 via a connector. The other end of the flame gun tube 24 is fixedly connected to a nozzle head 31. The nozzle head 31 is equipped with a flame ball 27. One end of the nozzle head 31 is fixedly installed with a flameout protection cover 28. A thermal sensor 29 is installed on the top of the nozzle head 31. A sensing wire 30 is connected to the thermal sensor 29. One end of the sensing wire 30 is connected to the flameout protection valve 25. Automatic furnace drying can better follow the furnace drying curve than manual furnace drying, and the furnace drying quality is higher than manual drying. By setting the flameout protection valve 25 and the thermal sensor 29 in combination, when the furnace drying flame gun is accidentally extinguished, the device can automatically shut off the natural gas source in a very short time, which can avoid the major safety hazard of a fire tunnel explosion.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automated drying system for a pot-type calcining furnace, comprising a pot-type calcining furnace (1), characterized in that: The interior of the tank-type calcining furnace (1) is provided with a first-layer fire channel (2). An upper-layer temperature measuring element (3) is fixedly installed inside the first-layer fire channel (2). A lower-layer temperature measuring element (4) is fixedly installed below the upper-layer temperature measuring element (3) in the first-layer fire channel (2). A flameout protection flame gun (5) is installed on one side of the tank-type calcining furnace (1). One end of the flameout protection flame gun (5) is fixedly connected to a connecting pipe (6). One end of the connecting pipe (6) is fixedly connected to a branch gas pipe (7). One end of the branch gas pipe (7) is fixedly connected to a main gas pipe (8). The tank-type calcining furnace (1) is fixedly connected to a negative pressure fan (9) through a pipe. An electrically controlled gas valve (10) is connected to the connecting pipe (6). A control branch valve (11) is connected to one side of the connecting pipe (6) near the electrically controlled gas valve (10). A bypass branch valve (12) is connected to the outer wall of the connecting pipe (6) via a pipe. A main shut-off valve (13) is connected to the outer wall of the branch gas pipe (7). The flameout protection flame gun (5) includes a flame gun tube (24). One end of the flame gun tube (24) is fixedly connected to a flameout protection valve (25). One end of the flameout protection valve (25) is connected to an inlet valve. The gas inlet (26) is fixedly connected to one end of the gas hose (23) via a connector. The other end of the flame gun tube (24) is fixedly connected to the flame gun head (31). The inside of the flame gun head (31) is provided with flame beads (27). One end of the flame gun head (31) is fixedly installed with a flameout protection cover (28). A thermal sensor (29) is installed on the top of the flame gun head (31). A sensing wire (30) is connected to the thermal sensor (29). One end of the sensing wire (30) is connected to the flameout protection valve (25).

2. The automated drying system for a pot-type calcining furnace according to claim 1, characterized in that: It also includes a control cabinet (14), wherein the upper temperature measuring element (3), the lower temperature measuring element (4) and the electrically controlled gas valve (10) are all electrically connected to the control cabinet (14) via wires.

3. The automated drying system for a pot-type calcining furnace according to claim 2, characterized in that: The control cabinet (14) is equipped with a control unit (15). The upper temperature measuring element (3) and the lower temperature measuring element (4) respectively include a first temperature measuring unit (16), a second temperature measuring unit (17) and a third temperature measuring unit (18). The first temperature measuring unit (16), the second temperature measuring unit (17) and the third temperature measuring unit (18) are all electrically connected to the control unit (15) through wires.

4. An automated drying system for a pot-type calcining furnace according to claim 3, characterized in that: It also includes an alarm (19), which is electrically connected to the control unit (15) via a wire.

5. An automated drying system for a pot-type calcining furnace according to claim 1, characterized in that: The branch gas pipe (7) is provided with several sets, and each set of branch gas pipes (7) is connected to a first gas valve (20). The branch gas pipe (7) is also connected to a second gas valve (21). The second gas valve (21) is connected in series with the first gas valve (20). The branch gas pipe (7) is connected in parallel with a third gas valve (22) through a pipe.

6. An automated drying system for a pot-type calcining furnace according to claim 1, characterized in that: One end of the branch gas pipe (7) is fixedly connected to a gas hose (23), and one end of the gas hose (23) is connected to one end of the flameout protection flame gun (5).

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