A ceramic kiln temperature intelligent control method

Abstract

The invention discloses an intelligent control system and method for the temperature of a ceramic kiln, which belongs to the field of ceramic sintering equipment and comprises a heating device, a cooling device and a temperature control device. The heating device comprises a plurality of burners, which are arranged in the ceramic kiln. The cooling device comprises a rapid cooling pipeline and a slow cooling pipeline, which are alternately arranged in the ceramic kiln. The temperature control device is used to control the heating device and the cooling device to adjust the temperature in the ceramic kiln in real time, thereby reducing the temperature fluctuation in the ceramic kiln. The intelligent control method for the temperature of the ceramic kiln determines whether to open and close an igniter and a gas valve by comparing the size of the upper and lower critical points of the temperature with the set value and expanding the sensing range of the temperature, so that the igniter and the gas valve will not be frequently opened and closed at the critical points of the temperature and the lower limit or when the temperature fluctuation is large, thereby improving the service life of the equipment and making the temperature variation amplitude in the ceramic kiln small, thereby improving the quality of the product and reducing the consumption of gas.

Description

Technical Field

[0001] The invention relates to the field of ceramic sintering equipment, and in particular to an intelligent control system and method for the temperature of a ceramic kiln. Background Art

[0002] Ceramic kiln is an important equipment for the production of building ceramics. It uses sticks as a carrier and can continuously and uninterruptedly fire the green body. During production, the tile green body is placed on a roller. As the sticks rotate, the green body is sequentially preheated in the preheating zone, fired at high temperature in the firing zone, and cooled in the cooling zone. The heating methods of ceramic kilns mainly include electric heating, gas heating, or biomass fuel heating. Among them, gas-heated ceramic kilns have less pollution and a wide range of energy sources. In particular, natural gas heating is relatively low in cost and less polluting than other methods. Gas heating is limited by the insufficient stability of the gas and combustion-supporting wind volume and pressure in the main pipeline, and the control of the furnace temperature and furnace pressure of the ceramic kiln is not very stable. The control requires precise control of the pressure difference and flow ratio of the combustion air and fuel gas in front of the burner. Currently, most control methods use a proportional valve combined with a PID program at the control end. Due to the relatively limited accuracy of the proportional valve control and the complexity of the actual situation, the control of the furnace temperature is not accurate enough, especially at the starting and ending ends of the temperature. It is not easy to achieve stable linear control, resulting in the igniter repeatedly igniting the nozzle. For products that are sensitive to firing temperature changes, it is difficult to control the quality using the current method, and frequent ignition will reduce the service life of the equipment and increase the equipment's use and maintenance costs. How to accurately control the temperature and improve the product firing quality is a problem to be solved.

[0003] The existing patent application with publication number CN108931144 A discloses an intelligent optimization method for temperature control of a ceramic kiln, and the specific steps are as follows: step (1), during each firing process, the kiln controller performs PID control on the temperature in the kiln through a PID control module according to a set temperature control curve in the kiln; step (2), after each firing, the kiln controller transmits the actual temperature data in the kiln to a PC through wireless communication; step (3), the firing worker scores and evaluates the ceramic firing result, inputs the score into a PC, and forms a sample with the actual temperature data; step (4), the PC optimizes the temperature curve in the kiln through a genetic algorithm based on these samples; step (5), the optimized temperature control curve is then transmitted by the PC to the kiln controller through wireless communication for controlling the next ceramic firing process. The PID control method can only eliminate steady-state errors as much as possible, but cannot effectively control the furnace temperature close to the critical point of the temperature, which will cause the furnace temperature to be repeatedly ignited at the critical point or when the temperature fluctuates greatly, resulting in large temperature fluctuations in the furnace, which is not conducive to the quality control of the fired products. Summary of the invention

[0004] One of the purposes of the present invention is to provide an intelligent temperature control system for a ceramic kiln, which solves the problem of frequent nozzle activation caused by inaccurate temperature fluctuations in the ceramic kiln.

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is as follows:

[0006] A ceramic kiln temperature intelligent control system comprises a heating device, a cooling device and a temperature control device, wherein the heating device comprises a plurality of burners, and the plurality of burners are arranged in the ceramic kiln; the cooling device comprises a rapid cooling pipeline and a slow cooling pipeline, and the rapid cooling pipeline and the slow cooling pipeline are alternately arranged in the ceramic kiln; the temperature control device is used to control the heating device and the cooling device to adjust the temperature in the ceramic kiln in real time, thereby reducing the temperature fluctuation in the ceramic kiln.

[0007] The temperature control device includes a controller, an actuator and a temperature signal input end, the temperature signal input end is connected to the controller, and the controller is connected to the actuator, and is used to process input signals and output control signals, and control the burner via the actuator.

[0008] The temperature control device also includes a thermal fuse, which is arranged between the actuator and the power line and is used to provide overcurrent and overheating protection for the actuator.

[0009] The heating device also includes a gas main pipe, a first electric valve, a second electric valve, and a flow meter. The gas main pipe is used to provide gas to the burners. The first electric valve, the second electric valve and the flow meter are connected to the gas main pipe in sequence to control the flow of gas in the gas main pipe to prevent gas leakage.

[0010] The burner includes a nozzle, a gas valve, an igniter and a flexible pipe. The nozzle and the igniter are arranged at the end of the burner. One end of the flexible pipe is connected to the burner, and the other end is connected to the gas main pipe. The gas valve is arranged on the flexible pipe. The gas valve can release gas quantitatively. The flexible pipe facilitates the adjustment of the combustion direction of the nozzle.

[0011] The rapid cooling pipeline includes a first temperature sensor, and the slow cooling pipeline includes a second temperature sensor. The first temperature sensor is arranged on both side walls of the rapid cooling pipeline, and the second temperature sensor is arranged on both side walls of the slow cooling pipeline. The first temperature sensor and the second temperature sensor are both connected to the temperature control device to provide a reference for temperature setting for the temperature control device.

[0012] The slow cooling pipeline also includes a first gas branch pipe and a first frame. The first gas branch pipe is arranged on the first frame. The first frame is arranged close to the inner wall of the ceramic kiln and is used to slowly reduce the temperature in the ceramic kiln to achieve slow cooling of the ceramic tile blanks.

[0013] The multiple burners are divided into two rows, upper and lower, each row of multiple burners is divided into multiple groups, each group of multiple burners are controlled separately by the temperature control device, so as to realize segmented control of the temperature in the ceramic kiln.

[0014] The second purpose of the present invention is to provide an intelligent temperature control method for a ceramic kiln, which solves the problem of unstable control of the temperature of the ceramic kiln and repeated ignition of the igniter when the temperature fluctuates.

[0015] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is as follows:

[0016] The specific steps include:

[0017] S1. Parameter setting: Manually set the upper limit T of the comparison temperature max and lower limit T min And select the reference temperature T sv ;

[0018] S2, access detection: determine whether the burner of the ceramic kiln is connected to the temperature control device of the ceramic kiln, if so, obtain the reference temperature T sv and the actual temperature T in the ceramic kiln pv And compare, then enter step S3; if not connected, exit the program;

[0019] S3. Temperature determination:

[0020] S3.1. Determine T pv -T sv ≥0, if yes, go to step S3.2, if no, go to step S3.3;

[0021] S3.2. Determine T pv -T sv >T max Is it true? If it is true, go to step S3.4. If it is not true, go to step S3.5.

[0022] S3.3. Determine T min <0 and T pv -T sv <T min Are both true? If true, proceed to step S3.6; if not, proceed to step S3.7;

[0023] S3.4, close the burner, and then proceed to step S4;

[0024] S3.5. Determine T min >0 and T pv -T sv <T min Are both true? If true, go to step S3.6; if not, go to step S3.7

[0025] S3.6, turn on the burner, and then proceed to step S4;

[0026] S3.7, the burner remains in its original state;

[0027] S4, looping through steps S1-S3 to control the on / off state of the burner, so as to prevent the burner from being frequently opened and closed, thereby reducing temperature fluctuations in the ceramic kiln.

[0028] It also includes step S3.8, and a PID temperature control method is also provided in the ceramic kiln. The PID temperature control method is executed after step S3.7, and after execution, it enters step S4. The PID temperature control method is used to control the opening size of the burner (11). The two methods are used in combination to stably control the temperature of the entire firing process in the ceramic kiln.

[0029] The beneficial effects of the present invention are:

[0030] (1) The ceramic kiln temperature intelligent control system controls the temperature inside the kiln by a heating device, a cooling device and a temperature control device. The heating device is provided with a plurality of burners, which are divided into a plurality of groups. Each group of burners can be controlled individually to adjust the temperature inside the kiln. Temperature sensors are provided on the rapid cooling pipeline and the slow cooling pipeline. The reference temperature can be set by selecting sensors at different positions or by combining the temperatures of various temperature sensors. The actual temperature and the set temperature are highly consistent, thereby improving the quality of processed tiles.

[0031] (2) The ceramic kiln temperature intelligent control method can be combined with a PID temperature control method or other temperature control methods. By comparing the upper and lower temperature critical points with the set value and expanding the temperature sensing range, it is decided whether to open and close the igniter and the gas valve, so that the igniter and the gas valve will not be frequently opened and closed at the upper and lower temperature critical points or when the temperature fluctuates greatly, thereby increasing the service life of the equipment, making the temperature fluctuation in the ceramic kiln smaller and the temperature more stable, thereby improving the quality of the product and reducing the gas consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The structure of the intelligent control system for the temperature of the ceramic kiln provided by the present invention is shown in FIG. Figure 1 ;

[0033] Figure 2 The structure of the intelligent control system for the temperature of the ceramic kiln provided by the present invention is shown in FIG. Figure 2 ;

[0034] Figure 3 The quenching pipeline structure provided by the present invention Figure 1 ;

[0035] Figure 4 A structural diagram of the slow cooling pipeline provided by the present invention;

[0036] Figure 5 The quenching pipeline structure provided by the present invention Figure 2 ;

[0037] Figure 6 The structure of the intelligent control system for the temperature of the ceramic kiln provided by the present invention is shown in FIG. Figure 3 ;

[0038] Figure 7 A control diagram of the intelligent control system for the temperature of a ceramic kiln provided by the present invention;

[0039] Figure 8 A circuit diagram of the temperature control device provided by the present invention;

[0040] Fig. 9 The present invention provides a flow chart of the ceramic kiln temperature intelligent control method.

[0041] Reference numerals:

[0042] 1. Heating device; 11. Burner; 111. Nozzle; 112. Gas valve; 113. Ignitor; 114. Flexible pipeline; 12. Gas main pipe; 13. First electric valve; 14. Second electric valve; 15. Third electric valve; 16. Fourth electric valve; 17. Flow meter; 18. Pressure regulating device; 2. Cooling device; 21. Rapid cooling pipeline; 211. First sensor; 22. Slow cooling pipeline; 221. Second temperature sensor; 222. First gas branch pipe; 223. First frame; 3. Temperature control device; 31. Controller; 32. Actuator; 33. Temperature signal input terminal; 34. Thermal fuse. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Embodiment 1

[0045] like Figure 1-Figure 8 As shown, a ceramic kiln temperature intelligent control system includes a heating device 1, a cooling device 2 and a temperature control device 3, the heating device 1 includes a plurality of burners 11, and the plurality of burners 11 are arranged in the ceramic kiln, the cooling device 2 includes a rapid cooling pipeline 21 and a slow cooling pipeline 22, and the rapid cooling pipeline 21 and the slow cooling pipeline 22 are alternately arranged in the ceramic kiln, and the temperature control device 3 is used to control the heating device 1 and the cooling device 2 to adjust the temperature in the ceramic kiln in real time.

[0046] For further details, see Figure 8 The temperature control device 3 includes a controller 31, an actuator 32 and a temperature signal input terminal 33. The temperature signal input terminal 33 is connected to the controller 31, the controller 31 is connected to the actuator 32, and the actuator 32 is connected to multiple solenoid valves. The solenoid valve is a proportional solenoid valve or a servo valve. The proportional solenoid valve and the servo valve can adjust the opening size of the gas valve 112 according to the received signal to adjust the speed of increasing the temperature in the ceramic kiln, and can also adjust whether the ceramic kiln is heated or kept warm. The gas valve 112 is used to control the output amount of the output combustible gas. The actuator 32 is controlled by the signal from the controller 31, and can drive the solenoid valve to operate through the actuator 32, so that the controller 31 can uniformly adjust multiple gas valves 112 at one time. One controller 31 can output drive signals to multiple actuators 32, which meets the use of large-size ceramic kilns and improves the consistency of the temperature in the ceramic kiln.

[0047] Preferably, the controller 31 is a programmable logic controller (PLC), which is a digital computing and operating electronic system suitable for industrial applications. It has a programmable memory that stores instructions for performing logical operations, sequential control, timing, counting, and arithmetic operations. It controls the actuator 32 to take action through a digital or analog temperature signal input terminal 33 and an output after internal logical operations.

[0048] Preferably, the temperature control device 3 is also provided with a thermal fuse 34, which is arranged between the actuator 32 and the power cord. The thermal fuse 34 is used for over-temperature and over-current protection of the actuator 32. The actuator 32 drives multiple gas valves 112 to operate at the same time. Overcurrent or overtemperature may occur during operation. The cost of the actuator 32 is relatively high, and it is necessary to implement a certain protection strategy for the actuator 32 to reduce the shutdown time of the ceramic kiln. Once the ceramic kiln is shut down, the furnace tiles will be scrapped.

[0049] Preferably, the heating device 1 also includes a gas main pipe 12, a first electric valve 13, a second electric valve 14, and a flow meter 17. The gas main pipe 12 is used to provide gas to multiple burners 11. The first electric valve 13, the second electric valve 14 and the flow meter 17 are connected to the gas main pipe 12 in sequence. The first electric valve 13 and the second electric valve 14 are used to control the gas in the gas main pipe 12 to flow to the burner 11. The double switch control prevents gas leakage, improves the stability of gas supply, and prevents gas leakage at the closed burner 11. One end of the gas main pipe 12 is connected to an external gas storage device, and the other end is connected to multiple first gas branch pipes 222. The flow meter 17 is used to measure the gas flow through the gas main pipe 12. The flow meter 17 can be connected to the controller 31 to feed back the gas flow data to the controller 31 to improve the accuracy of gas release.

[0050] Preferably, the heating device 1 is also provided with a third electric valve 15, a fourth electric valve 16 and a pressure regulating device 18. The third electric valve 15 and the fourth electric valve 16 are connected to the gas supply pipe 12 to strengthen the gas supply control and improve the safety of gas use. The pressure regulating device 18 is composed of three pressure valves, which can detect the gas pressure in the gas supply pipe 12 and adjust it to ensure the gas supply of the burner 11. At the same time, it can also check whether the gas is leaking, thereby improving the safety of gas use.

[0051] Preferably, the burner 11 includes a nozzle 111, a gas valve 112, an igniter 113 and a flexible pipe 114. The nozzle 111 and the igniter 113 are arranged at the end of the burner 11. One end of the flexible pipe 114 is connected to the burner 11, and the other end is connected to the gas main pipe 12. The gas valve 112 is arranged on the flexible pipe 114 to control the amount of gas finally ejected from the nozzle 111. The flexible pipe 114 can be bent in any direction to adjust the direction of the flame of the nozzle 111 to prevent the flame from directly burning the ceramic tile body. The nozzle 111 is made of ceramic or high-temperature resistant metal. The nozzle 111 is also provided with an oxygen hole for supplying oxygen, which is used to increase the combustion rate of the gas, release heat faster, and make the temperature control in the ceramic kiln more sensitive.

[0052] Preferably, the quenching pipeline 21 includes a first temperature sensor 211, and the slow cooling pipeline 22 includes a second temperature sensor 221. The first temperature sensor 211 is arranged on the two side walls of the quenching pipeline 21, and the second temperature sensor 221 is arranged on the two side walls of the slow cooling pipeline 22. The first temperature sensor 211 and the second temperature sensor 221 are both connected to the temperature control device 3. A plurality of first temperature sensors 211 are arranged in the quenching pipeline 21. The temperature control meter includes a plurality of first temperature sensors 211 and a plurality of second temperature sensors 221. The reference temperature T in the ceramic kiln can be selected through the temperature control meter. sv , reference temperature T svThe selection is realized manually, and the selected temperature is determined by multiple trials. It can also be comprehensively considered according to the temperature values ​​of the first temperature sensor 211 and the second temperature sensor 221. According to different ceramic kiln types and installation conditions, the reference temperature T sv The selection is different and needs to be set according to the specific situation of the ceramic kiln stage. The quenching pipeline 21 is used to quickly reduce the temperature in the ceramic kiln and can quickly clear the heat in the ceramic kiln.

[0053] Preferably, the slow cooling pipeline 22 also includes a first gas branch pipe 222 and a first frame 223. The first gas branch pipe 222 is arranged on the first frame 223. The first frame 223 is arranged close to the inner wall of the ceramic kiln. The slow cooling pipeline 22 is used to slowly reduce the temperature in the ceramic kiln to achieve slow cooling of the ceramic tile blanks and prevent the ceramic tile blanks from cracking internally due to a rapid drop in temperature. The first gas branch pipe 222 is connected to the first frame 223 by self-tapping screws. The first frame 223 is in the shape of a door, which is quick and easy to install.

[0054] Preferably, the multiple burners 11 are divided into two rows, upper and lower rows, and the multiple burners 11 in each row are divided into multiple groups. The multiple burners 11 in each group are controlled separately by the temperature control device 3. The temperature control device 3 controls the heating conditions of the burners 11 in groups, reducing the pressure on the control device 3, and at the same time, it can also perform more accurate temperature adjustment on each section in the ceramic kiln.

[0055] Embodiment 2

[0056] like Fig. 9 As shown, a ceramic kiln temperature intelligent control method specifically includes the following steps:

[0057] S1. Parameter setting: Manually set the upper limit T of the comparison temperature max and lower limit T min And select the reference temperature T sv ;

[0058] S2. Connection detection: determine whether the burner is connected to the temperature control device 3. If connected, obtain the reference temperature T sv and the actual temperature T in the ceramic kiln pv And compare, then enter step S3; if not connected, then exit the program, and alarm the operator for maintenance. After the maintenance is completed, enter the program by manual setting to complete the control. Through this step, the system self-checks to prevent the temperature instability in the ceramic kiln caused by system errors;

[0059] S3, temperature determination;

[0060] S3.1. Determine T pv -T sv≥0, if yes, go to step S3.2, if no, go to step S3.3;

[0061] S3.2. Determine T pv -T sv >T max Is it true? If it is true, go to step S3.4. If it is not true, go to step S3.5.

[0062] S3.3. Determine T min <0 and T pv -T sv <T min Are both true? If true, proceed to step S3.6; if not, proceed to step S3.7;

[0063] S3.4, close the burner 11, and then proceed to step S4;

[0064] S3.5. Determine T min >0 and T pv -T sv <T min Are both true? If true, go to step S3.6; if not, go to step S3.7

[0065] S3.6, turn on the burner, and then proceed to step S4;

[0066] S3.7, the burner remains in its original state;

[0067] S4, looping through steps S1-S3 to control the opening and closing state of the burner, so as to prevent the burner from being opened and closed frequently and reduce the temperature fluctuation in the ceramic kiln.

[0068] When the burner 11 is closed, the nozzle 111, the gas valve 112 and the power supply of the igniter 113 on the burner 11 are all in a closed state to prevent gas leakage in the ceramic kiln or malfunction of the igniter 113. When the burner 11 is opened, the gas valve 112 is opened and the igniter 113 is ignited. The heat generated by the gas increases the temperature in the ceramic kiln or achieves heat preservation. The method is to increase the actual temperature T pv and the reference temperature T obtained from the ceramic kiln sv By comparing and expanding the reaction temperature range for controlling the ignition of the burner 11, when the temperature in the ceramic kiln fluctuates, the burner 11 will not cause large temperature changes in the ceramic kiln due to frequent ignition, thereby improving the stability of tile firing and heat preservation, thereby improving the yield of the tile and also increasing the service life of the heating device 1.

[0069] Preferably, step S3.8 also includes a PID temperature section method and a PID temperature adjustment method. The PID temperature adjustment method is run after step S3.7, and then enters step S4. The PID temperature adjustment method is used to control the opening size of the burner. The combination of the two methods can stably control the temperature of the entire firing process in the ceramic kiln. The intelligent temperature control method for a ceramic kiln also includes a PID temperature regulation method. When the burner 11 of the intelligent temperature control method for a ceramic kiln maintains its original state, the PID temperature regulation method controls the opening of the burner 11. The controller 31 on the temperature control device 3 can simultaneously execute the PID regulation method and the intelligent temperature control method for the kiln. The PID regulation method is the temperature control method mentioned in the background technology CN108931144A. The opening of the gas valve 112 is PID-regulated to control the flame size and the amount of heat generated on the burner 11, so as to increase the temperature in the ceramic kiln or keep it warm. The temperature in the ceramic kiln is controlled by combining the two. During the firing process, the temperature in the ceramic kiln can be stabilized. When the temperature approaches the critical point, the frequent starting and stopping of the igniter 113 can be reduced, thereby improving the stability of the temperature in the ceramic kiln and the service life of the equipment.

[0070] The detailed process of temperature control of the ceramic kiln is as follows:

[0071] When the ceramic kiln is baking ceramic tiles, the PID temperature control method is used to heat the heating device 1 through the temperature curve to make the actual temperature T pv The firing temperature of the ceramic tile blanks is as close as possible and protected to be stable. When the temperature reaches the upper critical point of the ceramic tile firing temperature, the burner 11 needs to be closed to lower the temperature or maintain the temperature stable. The intelligent temperature control method of the ceramic kiln is used to control it. By expanding the reaction range of the temperature, the frequent start and stop of the burner 11 is reduced. When the firing temperature in the ceramic kiln reaches the lower critical point, the burner 11 needs to be opened to increase the temperature in the ceramic kiln or to keep it warm. The intelligent temperature control method of the ceramic kiln is used to control it by expanding the reaction range of the lower critical point temperature and reducing the frequent start and stop of the burner 11. The control logic of the two control methods are loaded on the controller 31 to realize accurate control of the firing temperature in the ceramic kiln.

[0072] Embodiment 3

[0073] The ceramic kiln temperature intelligent control method in Example 2 is implemented by the ceramic kiln temperature intelligent control system in Example 1. The cooling device can be used to control the temperature inside the ceramic kiln during the insulation and cooling stages to achieve a better control of the temperature inside the kiln, thereby improving the dimensional stability and surface quality of the fired ceramic tile blanks.

[0074] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs may also change and modify the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes of the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A ceramic kiln temperature intelligent control method, implemented by a ceramic kiln temperature intelligent control system, characterized in that: The ceramic kiln temperature intelligent control system comprises a heating device (1), a cooling device (2) and a temperature control device (3); the heating device (1) comprises a plurality of burners (11), the plurality of burners (11) being arranged in the ceramic kiln; the cooling device (2) comprises a rapid cooling pipeline (21) and a slow cooling pipeline (22), the rapid cooling pipeline (21) and the slow cooling pipeline (22) being arranged alternately in the ceramic kiln; the temperature control device (3) is used to control the heating device (1) and the cooling device (2) to adjust the temperature in the ceramic kiln in real time; the temperature control device (3) comprises a controller (31), an actuator (32) and a plurality of control devices (31). and a temperature signal input end (33), the temperature signal input end (33) being connected to the controller (31), the controller (31) being connected to the actuator (32), the quenching pipeline (21) comprising a first temperature sensor (211), the slow cooling pipeline (22) comprising a second temperature sensor (221), the first temperature sensor (211) being arranged on two side walls of the quenching pipeline (21), the second temperature sensor (221) being arranged on two side walls of the slow cooling pipeline (22), the first temperature sensor (211) and the second temperature sensor (221) being both connected to the temperature control device (3); The intelligent control method of ceramic kiln temperature specifically includes the following steps: S1. Parameter setting: Manually set the upper limit T of the comparison temperature max and lower limit T min And select the reference temperature T sv ; S2, access detection: determine whether the burner (11) of the ceramic kiln is connected to the temperature control device (3) of the ceramic kiln, and if so, obtain the reference temperature T sv and the actual temperature T in the ceramic kiln pv And compare, then enter step S3; if not connected, exit the program; S3. Temperature determination: S3.

1. Determine T pv -T sv ≥0, if yes, go to step S3.2, if no, go to step S3.3; S3.

2. Determine T pv -T sv >T max Is it true? If it is true, go to step S3.

4. If it is not true, go to step S3.

5. S3.

3. Determine T min <0 and T pv -T sv <T min Are both true? If true, proceed to step S3.6; if not, proceed to step S3.7; S3.4, close the burner (11), and then proceed to step S4; S3.

5. Determine T min >0 and T pv -T sv <T min Are both true? If true, go to step S3.6; if not, go to step S3.7 S3.6, turn on the burner (11), and then proceed to step S4; S3.7, the burner (11) remains in its original state; S4, looping through steps S1-S3 to control the opening and closing states of the burner (11).

2. The ceramic kiln temperature intelligent control method according to claim 1 is characterized in that: The temperature control device (3) further comprises a thermal fuse (34), wherein the thermal fuse (34) is arranged between the actuator (32) and a power line.

3. The ceramic kiln temperature intelligent control method according to claim 1, characterized in that: The heating device (1) further comprises a gas supply main pipe (12), a first electric valve (13), a second electric valve (14), and a flow meter (17); the gas supply main pipe (12) is used to supply gas to the burners (11); the first electric valve (13), the second electric valve (14), and the flow meter (17) are connected to the gas supply main pipe (12) in sequence.

4. The ceramic kiln temperature intelligent control method according to claim 3 is characterized in that: The burner (11) comprises a nozzle (111), a gas valve (112), an igniter (113) and a flexible pipe (114); the nozzle (111) and the igniter (113) are arranged at the ends of the burner (11); one end of the flexible pipe (114) is connected to the burner (11) and the other end is connected to the gas main pipe (12); the gas valve (112) is arranged on the flexible pipe (114).

5. The intelligent temperature control method of a ceramic kiln according to claim 1, characterized in that: The slow cooling pipeline (22) further comprises a first gas branch pipe (222) and a first frame (223), wherein the first gas branch pipe (222) is arranged on the first frame (223), and the first frame (223) is arranged close to the inner wall of the ceramic kiln.

6. The intelligent temperature control method of a ceramic kiln according to claim 1, characterized in that: The multiple burners (11) are divided into two rows, upper and lower, and the multiple burners (11) in each row are divided into multiple groups. The multiple burners (11) in each group are respectively controlled by the temperature control device (3).

7. A ceramic kiln temperature intelligent control method according to any one of claims 1 to 6, characterized in that: It also includes step S3.8, and a PID temperature regulation method is also provided in the ceramic kiln. The PID temperature regulation method is run after step S3.7, and then enters step S4. The PID temperature regulation method is used to control the opening size of the burner (11).

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