Constant temperature control system and method of electric roller kiln based on mixed use of multiple energy sources

Abstract

The present invention discloses a constant temperature control system and method for an electric-fired roller kiln based on the mixed use of multiple energy sources, and relates to the technical field of kilns. The constant temperature control system for an electric-fired roller kiln based on the mixed use of multiple energy sources includes: an electric-fired roller kiln temperature detection module, a constant temperature dynamic control module, a multi-energy proportion control module, and an automatic temperature control module. The present invention obtains the temperature difference by obtaining the temperature analysis of the electric-fired roller kiln and determines whether to perform constant temperature control. Then, the temperature control level is obtained through the temperature difference analysis coefficient of the electric-fired roller kiln, and heat energy is supplied accordingly. At the same time, the heat energy data is obtained in combination with the preset ratio and the adjusted temperature difference to obtain the constant temperature ratio in accordance with the evaluation coefficient for proportion adjustment. Finally, the energy supply is automatically switched according to the stage division evaluation coefficient, thereby achieving the effect of improving the accuracy of the constant temperature control of the electric-fired roller kiln using multiple energy sources, and solving the problem of inaccurate constant temperature control of the electric-fired roller kiln using multiple energy sources in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of kilns, and in particular to a constant temperature control system and method for an electric-fired roller kiln based on mixed use of multiple energy sources. Background Art

[0002] In the tile production industry, electric-fired roller kilns, as key equipment, play an important role in the sintering process of tiles. Electric-fired roller kilns use electricity as the main energy source, and drive the tile blanks to move in the kiln through the rotation of rollers to achieve a continuous sintering process. It has the advantages of relatively uniform temperature distribution, high degree of automation, and high production efficiency, and can meet the needs of large-scale tile production. In terms of temperature control, traditional electric-fired roller kilns usually use a relatively simple temperature control system, which mainly relies on thermostats to adjust the power of heating elements by setting fixed temperature parameters to maintain the temperature in the kiln. However, this control method exposes many problems when facing complex production conditions and scenarios where multiple energy sources are used in combination. During the operation of the electric-fired roller kiln, it is affected by environmental factors (such as changes in ambient temperature and humidity), material properties (different blank materials and moisture content), and equipment losses, and the temperature in the kiln is prone to fluctuations. At the same time, when auxiliary energy such as solar energy and wind energy are introduced and used in combination with electricity, the dynamic response characteristics and heating efficiency of different energy sources vary significantly. For example, solar energy is limited by the intensity and duration of light, and its energy output is unstable; wind energy is affected by wind speed, and its energy output is unstable; and the supply of wind energy may be affected by climatic conditions. When switching or using these energy sources in coordination, traditional control systems are difficult to accurately coordinate the proportion of each energy source, resulting in inaccurate constant temperature control of electric roller kilns that use multiple energy sources, which in turn affects the product quality and energy efficiency of tiles. This not only increases production costs, but also restricts the green and sustainable development of the ceramic industry.

[0003] For example, a constant temperature kiln control method and system disclosed in a patent application with publication number: CN118328724A includes: in the kiln temperature rise stage, calculating the heat required for the kiln to reach the set temperature and the required amount of fuel; calculating the amount of combustion air based on the required heat and fuel; and controlling the combustion equipment of each channel and the amount of fuel transported to make the kiln reach the set temperature; in the material burning stage, calculating the heat required for burning and the required amount of fuel; calculating the amount of combustion air based on the required heat and fuel; and controlling the combustion equipment of each channel and the amount of fuel transported to burn the material to obtain the product.

[0004] For example, the wall brick, kiln and kiln temperature control system disclosed in the invention patent with the announcement number CN117249685B include a brick body and a connector. A medium channel is provided inside the brick body, and the medium channel includes at least two ports. The connector corresponds to the two ports of the medium channel one by one, including a connecting channel, a flexible sealing portion and a traction assembly, the connecting channel is at least partially inserted into the port of the medium channel, and an extrusion portion is provided on the outer peripheral wall of the connecting channel around the axis of the connecting channel, the extrusion portion protrudes from the outer peripheral wall of the connecting channel, the flexible sealing portion is connected to the connecting channel, and the connection between the flexible sealing portion and the connecting channel is located on the side of the extrusion portion away from the port of the medium channel, and the flexible sealing portion is partially sandwiched between the extrusion portion and the inner peripheral wall of the medium channel.

[0005] However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the present application found that the above technology has at least the following technical problems:

[0006] In the prior art, since different energy sources have different dynamic response characteristics and heating efficiencies, imbalance is prone to occur when switching or using them in coordination, and there is a problem of inaccurate constant temperature control of electric-fired roller kilns using a mixture of multiple energy sources. Summary of the invention

[0007] The embodiment of the present application solves the problem of inaccurate constant temperature control of electric-fired roller kilns using multiple energy sources in the prior art by providing a constant temperature control system and method for electric-fired roller kilns using multiple energy sources, thereby improving the accuracy of constant temperature control of electric-fired roller kilns using multiple energy sources.

[0008] The embodiment of the present application provides a constant temperature control system for an electric-burning roller kiln based on the mixed use of multiple energy sources, including: an electric-burning roller kiln temperature detection module, a constant temperature dynamic control module, a multi-energy proportional control module and an automatic temperature control module; wherein the electric-burning roller kiln temperature detection module is used to obtain the temperature of each preset deployment position of the electric-burning roller kiln at a preset time point, and obtain the corresponding adjusted temperature difference through analysis to determine whether to perform constant temperature control; the constant temperature dynamic control module is used to obtain the temperature difference analysis coefficient of the electric-burning roller kiln through the adjusted temperature difference of each preset deployment position and external data, and according to the electric-burning roller kiln The temperature difference analysis coefficient is used to obtain the temperature control level. The temperature difference analysis coefficient of the electric-fired roller kiln is used to comprehensively reflect the stability of the temperature difference change of the electric-fired roller kiln; the multi-energy proportion control module is used to supply heat energy and obtain heat energy data according to the temperature control level, and the obtained heat energy data is combined with the preset ratio and the adjusted temperature difference to obtain the constant temperature ratio compliance evaluation coefficient, and the proportion is adjusted based on the constant temperature ratio compliance evaluation coefficient. The constant temperature ratio compliance evaluation coefficient is used to evaluate the compliance degree of the preset ratio of multiple energy sources; the automatic temperature control module is used to combine the real-time obtained kiln temperature data with the heat energy The source data is combined to obtain a stage division evaluation coefficient, and the energy supply is automatically switched based on the stage division evaluation coefficient. The stage division evaluation coefficient is used to determine the temperature control stage of the electric-fired roller kiln. The specific process of determining whether to perform constant temperature control is as follows: obtain reference judgment data from a preset database, and the reference judgment data includes temperature deviation and preset fault tolerance ratio; compare the adjusted temperature difference of each preset deployment position with the temperature deviation in turn: if the adjusted temperature difference is not greater than the temperature deviation, mark the preset deployment position as 1, and the adjusted temperature difference represents the difference between the temperature of each preset deployment position and the preset constant temperature; if the adjusted temperature difference is greater than the temperature deviation, mark the preset deployment position as 0; count the number of preset deployment positions marked as 0, and combine the statistical results with the total number of preset deployment positions to obtain the constant temperature out-of-control point ratio, and the constant temperature out-of-control point ratio is represented by the ratio of the statistical results to the total number of preset deployment positions; compare the constant temperature out-of-control point ratio with the preset fault tolerance ratio: if the constant temperature out-of-control point ratio is not greater than the preset fault tolerance ratio, constant temperature control is not performed; if the constant temperature out-of-control point ratio is greater than the preset fault tolerance ratio, the function of the constant temperature dynamic control module is executed.

[0009] Furthermore, the external data include ambient temperature, ambient humidity, supply rate, and system response speed; the thermal energy data include temperature change rate, solar energy consumption, wind energy consumption, and electrical energy consumption; the kiln temperature data include kiln temperature, temperature change rate, heat source output power, and kiln pressure.

[0010] Furthermore, the specific process of obtaining the temperature difference analysis coefficient of the electric-fired roller kiln is as follows: the preset time points and the preset deployment positions are numbered respectively, and reference external data are obtained from a preset database, wherein the reference external data includes the preset constant temperature, the average humidity, the maximum supply rate, and the minimum supply rate; an external adjustment coefficient is obtained according to the external data and the reference external data, and the external adjustment coefficient is used to quantify the influence of external factors on the constant temperature control; the system response speed is preprocessed, and the preprocessing is used to normalize the system response speed; the adjusted temperature difference is obtained and combined with the external adjustment coefficient to obtain the temperature difference analysis coefficient of the electric-fired roller kiln.

[0011] Furthermore, the specific process of obtaining the constant temperature proportion compliance evaluation coefficient is as follows: the thermal energy is numbered according to the category of thermal energy, and the preset proportion and corresponding thermal energy data corresponding to the thermal energy are obtained; based on the temperature control level, the usage marking coefficient is assigned to all thermal energy; the total energy consumption is obtained through the thermal energy data and the corresponding usage marking coefficient, and the reference temperature change rate is obtained from the preset database, and the constant temperature proportion compliance evaluation coefficient is obtained by combining the thermal energy data and the preset proportion.

[0012] Furthermore, the specific limiting expression of the constant temperature ratio conforming to the evaluation coefficient is as follows: In the formula, t represents the number of the preset time point, , Indicates the total number of preset time points. represents the solar energy consumption at the t-th preset time point, represents the wind energy consumption at the tth preset time point, represents the power consumption at the tth preset time point, Indicates the usage mark coefficient corresponding to the solar energy consumption at the t-th preset time point, Indicates the usage mark coefficient corresponding to the wind energy consumption at the t-th preset time point, Indicates the usage mark coefficient corresponding to the power consumption at the t-th preset time point, represents the temperature change rate at the tth preset time point, represents the reference temperature change rate, represents the total energy consumption at the tth preset time point, Indicates the preset ratio, It indicates that the constant temperature ratio at the t-th preset time point meets the evaluation coefficient.

[0013] Furthermore, the specific process of performing proportion adjustment based on the constant temperature proportion compliance evaluation coefficient is as follows: obtaining a proportion evaluation threshold from a preset database and comparing it with the constant temperature proportion compliance evaluation coefficient: if the constant temperature proportion compliance evaluation coefficient is not less than the proportion evaluation threshold, no proportion adjustment is performed; if the constant temperature proportion compliance evaluation coefficient is less than the proportion evaluation threshold, a proportion adjustment is performed; the specific process of performing proportion adjustment is as follows: constructing a proportion adjustment mapping set of proportion compliance difference and adjustment strength ratio, the proportion compliance difference representing the difference between the constant temperature proportion compliance evaluation coefficient and the proportion evaluation threshold; obtaining a corresponding adjustment strength ratio from the proportion adjustment mapping set, and adjusting the preset proportion according to the corresponding adjustment strength ratio.

[0014] Furthermore, the specific process of the stage division evaluation coefficient is as follows: obtain reference kiln temperature data from a preset database, the reference kiln temperature data including average output power and average kiln pressure; perform data preprocessing on the kiln temperature data, the data preprocessing means de-unitizing the kiln temperature data and unifying the dimensions; obtain the preset constant temperature and combine the kiln temperature data and the reference kiln temperature data to obtain the kiln temperature coefficient, the kiln temperature coefficient including temperature coefficient, temperature change rate coefficient, heat source output power coefficient and kiln pressure coefficient; perform sum operation on the kiln temperature coefficient and post-process it to obtain the stage division evaluation coefficient.

[0015] Furthermore, the specific method of automatically switching the energy supply based on the stage division evaluation coefficient is as follows: obtaining the stage division interval from a preset database, the stage division interval includes a start-up interval, a heating interval, a constant temperature interval and a cooling interval; if the stage division evaluation coefficient is within the start-up interval, the supply of heat energy is automatically switched according to a preset supply rule to adapt to the start-up stage of the electric-fired roller kiln, and the preset supply rule includes a preset ratio and a corresponding supply of heat energy; if the stage division evaluation coefficient is within the heating interval, the supply of heat energy is automatically switched according to a preset supply rule to adapt to the heating stage of the electric-fired roller kiln; if the stage division evaluation coefficient is within the constant temperature interval, the supply of heat energy is automatically switched according to a preset supply rule to adapt to the constant temperature stage of the electric-fired roller kiln; if the stage division evaluation coefficient is within the cooling interval, the supply of heat energy is automatically switched according to a preset supply rule to adapt to the cooling stage of the electric-fired roller kiln.

[0016] The embodiment of the present application provides a constant temperature control method for an electric-fired roller kiln based on the mixed use of multiple energy sources, comprising the following steps: obtaining the temperature of each preset deployment position at a preset time point of the electric-fired roller kiln, and obtaining the corresponding adjusted temperature difference through analysis to determine whether to perform constant temperature control; obtaining the temperature difference analysis coefficient of the electric-fired roller kiln through the adjusted temperature difference of each preset deployment position and external data, and obtaining the temperature control level according to the temperature difference analysis coefficient of the electric-fired roller kiln, the temperature difference analysis coefficient of the electric-fired roller kiln is used to comprehensively reflect the stability of the temperature difference change of the electric-fired roller kiln; supplying heat energy according to the temperature control level and obtaining heat energy data, combining the obtained heat energy data with the preset ratio and the adjusted temperature difference to obtain a constant temperature ratio compliance evaluation coefficient, and adjusting the ratio based on the constant temperature ratio compliance evaluation coefficient, the constant temperature ratio compliance evaluation coefficient is used to evaluate the compliance degree of the preset ratio of multiple energy sources; combining the kiln temperature data obtained in real time with the heat energy data to obtain a stage division evaluation coefficient, and automatically switching the energy supply based on the stage division evaluation coefficient, the stage division evaluation coefficient The coefficient is used to judge the temperature control stage of the electric-fired roller kiln. The specific process of judging whether to perform constant temperature control is as follows: obtain reference judgment data from a preset database, and the reference judgment data includes temperature deviation and preset fault tolerance ratio; compare the adjusted temperature difference of each preset deployment position with the temperature deviation in turn: if the adjusted temperature difference is not greater than the temperature deviation, mark the preset deployment position as 1, and the adjusted temperature difference represents the difference between the temperature of each preset deployment position and the preset constant temperature; if the adjusted temperature difference is greater than the temperature deviation, mark the preset deployment position as 0; count the number of preset deployment positions marked as 0, and combine the statistical results with the total number of preset deployment positions to obtain the proportion of constant temperature out-of-control points, and the proportion of constant temperature out-of-control points is represented by the ratio of the statistical results to the total number of preset deployment positions; compare the proportion of constant temperature out-of-control points with the preset fault tolerance ratio: if the proportion of constant temperature out-of-control points is not greater than the preset fault tolerance ratio, no constant temperature control is performed; if the proportion of constant temperature out-of-control points is greater than the preset fault tolerance ratio, the function of the constant temperature dynamic control module is executed.

[0017] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0018] 1. The temperature difference analysis coefficient of the electric-fired roller kiln is obtained by adjusting the temperature difference and external data to obtain the temperature control level, and the heat energy data is obtained while supplying heat energy according to the temperature control level. Then, the obtained heat energy data is combined with the preset ratio and the adjusted temperature difference to obtain the constant temperature ratio in accordance with the evaluation coefficient for proportion adjustment. Finally, the real-time kiln temperature data is combined with the heat energy data to obtain the stage division evaluation coefficient and the energy supply is automatically switched accordingly, thereby realizing the dynamic regulation and automation of multi-energy mixed control, thereby improving the accuracy of constant temperature control of the electric-fired roller kiln with multi-energy mixed use, and effectively solving the problem of inaccurate constant temperature control of the electric-fired roller kiln with multi-energy mixed use in the prior art.

[0019] 2. By numbering the preset time points and preset deployment positions respectively, and obtaining reference external data from the preset database, and then obtaining the external adjustment coefficient based on the external data and the reference external data, and pre-processing the system response speed, finally obtaining the adjusted temperature difference and combining the external adjustment coefficient to obtain the temperature difference analysis coefficient of the electric-fired roller kiln, the temperature condition of the electric-fired roller kiln can be more accurately evaluated, and then more accurate constant temperature control of the electric-fired roller kiln can be achieved.

[0020] 3. By numbering the thermal energy according to the category of thermal energy, and obtaining the corresponding preset ratio and corresponding thermal energy data of the thermal energy, and then assigning the usage marking coefficient to all thermal energy based on the temperature control level, and then obtaining the total energy consumption through the thermal energy data and the corresponding usage marking coefficient, and obtaining the reference temperature change rate from the preset database, and finally combining the thermal energy data and the preset ratio to obtain the constant temperature ratio compliance evaluation coefficient, the compliance degree of each thermal energy ratio can be more accurately evaluated, thereby achieving more accurate regulation of the thermal energy ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a constant temperature control system for an electric roller kiln based on the mixed use of multiple energy sources provided in an embodiment of the present application;

[0022] Figure 2 A schematic diagram of the changes in the stage division evaluation coefficients provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] In this embodiment, the electric roller kiln, as a key equipment for sintering ceramic tiles, is closely connected with the four core modules in this technology, and accurate constant temperature control is achieved through data interaction and command transmission. The following will elaborate on the connection relationship between each module and the electric roller kiln in terms of data flow, control command transmission, etc.

[0024] Electric roller kiln temperature detection module and electric roller kiln: The electric roller kiln temperature detection module and the electric roller kiln are directly connected through temperature sensors. The temperature sensors are installed at the preset deployment positions of the electric roller kiln. The selection of these positions fully considers the representativeness of the temperature distribution in the kiln, including different areas, near the heating elements, and key parts where the tile blanks pass. The sensor collects the temperature data of the electric roller kiln at the preset time point in real time and transmits it to the electric roller kiln temperature detection module. The module analyzes and processes the received data and calculates the adjusted temperature difference between the temperature of each preset deployment position and the preset constant temperature. Based on the adjusted temperature difference, the module further determines whether the electric roller kiln needs to start the constant temperature control process. This connection provides a real-time and critical temperature data basis for the entire constant temperature control system, which is an important prerequisite for subsequent precise control.

[0025] Constant temperature dynamic control module and electric roller kiln: The connection between the constant temperature dynamic control module and the electric roller kiln is indirect and driven by multiple data sources. On the one hand, the constant temperature dynamic control module receives the adjusted temperature difference data from the temperature detection module of the electric roller kiln, which reflects the deviation between the current temperature of the electric roller kiln and the preset constant temperature. On the other hand, through equipment such as environmental sensors and dynamic analyzers, the constant temperature dynamic control module obtains external data such as ambient temperature, humidity, supply rate, and system response speed. Combining the adjusted temperature difference with external data, the module uses a specific algorithm to calculate the temperature difference analysis coefficient of the electric roller kiln and determines the temperature control level accordingly. The temperature control level information is then transmitted to the multi-energy proportional control module as an important basis for adjusting the energy supply strategy. The constant temperature dynamic control module plays a key role in data fusion and analysis in the entire system, providing the core control parameters for achieving precise constant temperature control.

[0026] Multi-energy ratio control module and electric roller kiln: The connection between the multi-energy ratio control module and the electric roller kiln is mainly reflected in two aspects: energy supply and data feedback. In terms of energy supply, the module sends instructions to the energy supply equipment such as solar energy, wind energy and electric energy of the electric roller kiln according to the temperature control level provided by the constant temperature dynamic control module to accurately adjust the supply ratio of different energy sources. When the temperature control level requires an increase in heat, the module may increase the supply ratio of electric energy and reasonably allocate the supply of solar energy and wind energy. In terms of data feedback, the multi-energy ratio control module collects heat energy data such as solar energy consumption, wind energy consumption, electric energy consumption and temperature change rate in real time through heat energy detection equipment such as temperature sensors, solar power meters, and electric energy meters. These data not only reflect the actual use of energy, but also provide a basis for the module to further optimize the energy supply strategy to ensure that the energy supply matches the actual temperature requirements of the electric roller kiln.

[0027] Automatic temperature control module and electric roller kiln: There is a two-way connection between the automatic temperature control module and the electric roller kiln. The automatic temperature control module obtains the kiln temperature data of the electric roller kiln in real time, including the kiln temperature, temperature change rate, heat source output power and kiln pressure, and receives the heat energy data provided by the multi-energy ratio control module. Combining these two types of data, the automatic temperature control module calculates the stage division evaluation coefficient through a specific algorithm to determine the temperature control stage of the electric roller kiln, such as the start-up, heating, constant temperature or cooling stage. Based on the judgment of the temperature control stage, the automatic temperature control module sends an energy switching instruction to the energy supply equipment of the electric roller kiln to realize automatic adjustment of energy supply. In the startup stage, the module will adjust the energy supply ratio and type according to the preset supply rules to meet the special needs of the startup stage. As the operation stage of the electric roller kiln changes, the automatic temperature control module continuously monitors and adjusts the energy supply to ensure that the temperature in the kiln remains stable at all times, realizing efficient and accurate constant temperature control.

[0028] The embodiment of the present application solves the problem of inaccurate constant temperature control of an electric-fired roller kiln using a mixed energy source in the prior art by providing a constant temperature control system and method for an electric-fired roller kiln using a mixed energy source. The temperature difference is adjusted by obtaining the temperature analysis of each preset deployment position of the electric-fired roller kiln to determine whether to perform constant temperature control. Then, the preset time points and the preset deployment positions are numbered respectively, and reference external data is obtained from a preset database. Then, an external adjustment coefficient is obtained based on the external data and the reference external data, and the system response speed is preprocessed. Then, the adjusted temperature difference is obtained and combined with the external adjustment coefficient to obtain the temperature difference analysis coefficient of the electric-fired roller kiln to obtain the temperature control level. The thermal energy is numbered according to its category, and the preset ratio and corresponding thermal energy data of the thermal energy are obtained. Then, the usage marking coefficient is assigned to all thermal energy based on the temperature control level. The total energy consumption is obtained through the thermal energy data and the corresponding usage marking coefficient, and the reference temperature change rate is obtained from the preset database. The constant temperature ratio meets the evaluation coefficient by combining the thermal energy data and the preset ratio, and the ratio is adjusted accordingly. Finally, the real-time kiln temperature data is combined with the thermal energy data to obtain the stage division evaluation coefficient and the energy supply is automatically switched accordingly, thereby improving the accuracy of constant temperature control of the electric-fired roller kiln with mixed use of multiple energy sources.

[0029] The technical solution in the embodiment of the present application is to solve the problem of inaccurate constant temperature control of the electric-fired roller kiln using multiple energy sources. The overall idea is as follows:

[0030] By obtaining the temperature analysis of the electric-fired roller kiln, the temperature difference is adjusted and it is determined whether constant temperature control is performed. Then, the temperature control level is obtained through the temperature difference analysis coefficient of the electric-fired roller kiln, and heat energy is supplied accordingly. At the same time, the heat energy data is obtained and combined with the preset ratio and the adjusted temperature difference to obtain the constant temperature ratio in accordance with the evaluation coefficient for proportional adjustment. Finally, the energy supply is automatically switched according to the obtained stage division evaluation coefficient, thereby achieving the effect of improving the accuracy of constant temperature control of the electric-fired roller kiln with mixed energy.

[0031] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] like Figure 1 As shown, it is a structural schematic diagram of the electric-fired roller kiln constant temperature control system based on the mixed use of multiple energy sources provided in the embodiment of the present application. The electric-fired roller kiln constant temperature control system based on the mixed use of multiple energy sources provided in the embodiment of the present application includes: an electric-fired roller kiln temperature detection module, a constant temperature dynamic control module, a multi-energy proportional control module and an automatic temperature control module; wherein, the electric-fired roller kiln temperature detection module is used to obtain the temperature of each preset deployment position of the electric-fired roller kiln at a preset time point, and obtain the corresponding adjusted temperature difference through analysis to determine whether to perform constant temperature control; the constant temperature dynamic control module is used to obtain the temperature difference analysis coefficient of the electric-fired roller kiln through the adjusted temperature difference of each preset deployment position and external data, and obtain the temperature difference analysis coefficient of the electric-fired roller kiln according to the temperature difference analysis coefficient of the electric-fired roller kiln To the temperature control level, the temperature difference analysis coefficient of the electric-fired roller kiln is used to comprehensively reflect the stability of the temperature difference change of the electric-fired roller kiln; the multi-energy proportion control module is used to supply heat energy and obtain heat energy data according to the temperature control level, and the obtained heat energy data is combined with the preset proportion and the adjusted temperature difference to obtain the constant temperature proportion compliance evaluation coefficient, and the proportion is adjusted based on the constant temperature proportion compliance evaluation coefficient. The constant temperature proportion compliance evaluation coefficient is used to evaluate the compliance degree of the preset proportion of multiple energy sources; the automatic temperature control module is used to combine the real-time acquired kiln temperature data with the heat energy data to obtain the stage division evaluation coefficient, and automatically switch the energy supply based on the stage division evaluation coefficient. The stage division evaluation coefficient is used to determine the temperature control stage of the electric-fired roller kiln.

[0033] In this embodiment, the specific process of obtaining the temperature control level according to the temperature difference analysis coefficient of the electric-fired roller kiln is as follows: the temperature control interval is obtained from the preset database, and the temperature control interval includes a start-up temperature control interval, a rising temperature control interval, a constant temperature control interval, and a cooling temperature control interval. If the temperature difference analysis coefficient of the electric-fired roller kiln belongs to the start-up temperature control interval, the temperature control level of the electric-fired roller kiln at the current preset time point is the first temperature control level. If the temperature difference analysis coefficient of the electric-fired roller kiln belongs to the rising temperature control interval, the temperature control level of the electric-fired roller kiln at the current preset time point is the second temperature control level. If the temperature difference analysis coefficient of the electric-fired roller kiln belongs to the constant temperature control interval, the temperature control level of the electric-fired roller kiln at the current preset time point is the third temperature control level; if the temperature difference analysis coefficient of the electric-fired roller kiln belongs to the cooling temperature control interval, the temperature control level of the electric-fired roller kiln at the current preset time point is the fourth temperature control level. The temperature control levels include the first temperature control level, the second temperature control level, the third temperature control level and the fourth temperature control level; the synergistic effect of the system modules of the electric-fired roller kiln helps to improve the accuracy of constant temperature control of the electric-fired roller kiln with mixed energy sources.

[0034] Specifically, the temperature control interval is obtained from a preset database. In a specific embodiment, the external data of the startup phase in the historical data is substituted into the specific restriction expression of the temperature difference analysis coefficient of the electric-fired roller kiln to obtain the corresponding data set, and the data set is averaged to obtain the first temperature control mean; the external data of the rising phase in the historical data is substituted into the specific restriction expression of the temperature difference analysis coefficient of the electric-fired roller kiln to obtain the corresponding data set, and the data set is averaged to obtain the second temperature control mean; the external data of the constant temperature phase in the historical data is substituted into the specific restriction expression of the temperature difference analysis coefficient of the electric-fired roller kiln to obtain the corresponding data set, and the data set is averaged to obtain the third temperature control mean; define the range corresponding to 0 to the first temperature control mean as the startup temperature control interval, the interval corresponding to the first temperature control mean to the second temperature control mean is the rising temperature control interval, the interval corresponding to the second temperature control mean to the third temperature control mean is the constant temperature control interval, otherwise it is the cooling temperature control interval.

[0035] It should be added that external data include ambient temperature, ambient humidity, supply rate, and system response speed; thermal energy data include temperature change rate, solar energy consumption, wind energy consumption, and electrical energy consumption; kiln temperature data include kiln temperature, temperature change rate, heat source output power, and kiln pressure.

[0036] Specifically, external data is measured by corresponding environmental sensors, which include ambient temperature sensors, humidity sensors and flow sensors, and the system response speed is obtained by a dynamic analyzer; thermal energy data is collected by thermal energy detection equipment, which includes temperature sensors, solar power meters and electric energy meters, wherein the temperature change rate is measured by temperature sensors, wind energy consumption is obtained by recording the power generation of wind turbines, solar energy consumption is measured by solar power meters, and electric energy consumption is measured by electric energy meters; kiln temperature data is obtained by corresponding kiln temperature detection instruments, which include thermocouples, data recorders, power meters and differential pressure meters, wherein the temperature inside the kiln is measured by thermocouples, the temperature change rate represents the relative deviation of the temperature inside the kiln at two adjacent preset time points, the heat source output power is measured by a power meter, and the pressure inside the kiln is measured by a differential pressure meter; the various types of external data, thermal energy data and kiln temperature data collected and processed as above provide support for the constant temperature control of the electric-fired roller kiln.

[0037] Furthermore, the specific process for determining whether to perform constant temperature control is as follows: obtain reference judgment data from a preset database, the reference judgment data including temperature deviation and preset fault tolerance ratio; compare the adjusted temperature difference of each preset deployment position with the temperature deviation in turn: if the adjusted temperature difference is not greater than the temperature deviation, mark the preset deployment position as 1, and the adjusted temperature difference represents the difference between the temperature of each preset deployment position and the preset constant temperature; if the adjusted temperature difference is greater than the temperature deviation, mark the preset deployment position as 0; count the number of preset deployment positions marked as 0, and combine the statistical results with the total number of preset deployment positions to obtain the proportion of constant temperature out of control points, and the proportion of constant temperature out of control points is represented by the ratio of the statistical results to the total number of preset deployment positions; compare the proportion of constant temperature out of control points with the preset fault tolerance ratio: if the proportion of constant temperature out of control points is not greater than the preset fault tolerance ratio, no constant temperature control is performed; if the proportion of constant temperature out of control points is greater than the preset fault tolerance ratio, the function of the constant temperature dynamic control module is executed.

[0038] In this embodiment, by comparing and adjusting the temperature difference and the temperature deviation, and combining the judgment of the constant temperature out-of-control point ratio and the preset fault tolerance ratio, it is possible to more accurately judge whether it is necessary to perform constant temperature control of the electric-fired roller kiln. This method avoids the misjudgment that may be caused by the judgment of a single temperature point, and improves the accuracy and reliability of the judgment.

[0039] Specifically, the reference judgment data is obtained from a preset database. In a specific embodiment, the temperature deviation and the preset fault tolerance ratio are set by professional electric roller kiln staff according to specific production conditions. For example, the temperature deviation can be set to 20 degrees Celsius and the preset fault tolerance ratio can be set to 5%.

[0040] Furthermore, the specific process of obtaining the temperature difference analysis coefficient of the electric roller kiln is as follows: the preset time points and the preset deployment positions are numbered respectively, and reference external data are obtained from the preset database. The reference external data includes the preset constant temperature, average humidity, maximum supply rate and minimum supply rate; the external adjustment coefficient is obtained according to the external data and the reference external data, that is, , the external adjustment coefficient is used to quantify the impact of external factors on constant temperature control; the system response speed is preprocessed, and the preprocessing is used to normalize the system response speed; the adjusted temperature difference is obtained and combined with the external adjustment coefficient to obtain the temperature difference analysis coefficient of the electric-fired roller kiln. The specific restriction expression of the temperature difference analysis coefficient of the electric-fired roller kiln is as follows: In the formula, t represents the number of the preset time point, , represents the total number of preset time points, d represents the number of the preset deployment location, , Indicates the total number of preset deployment locations. represents the number of the dth preset deployment position at the tth preset time point, , represents the total number of preset deployment locations at the tth preset time point, represents the ambient temperature of the dth preset deployment location at the tth preset time point, represents the ambient humidity at the dth preset deployment location at the tth preset time point, represents the supply rate at the dth preset deployment location at the tth preset time point, represents the system response speed at the dth preset deployment location at the tth preset time point, represents the adjusted temperature difference at the dth preset deployment position at the tth preset time point, Indicates the preset constant temperature. represents the average humidity, Indicates the maximum supply rate, Indicates the minimum supply rate, represents the external adjustment coefficient of the d-th preset deployment position at the t-th preset time point, Represents the temperature difference analysis coefficient of the electric-fired roller kiln at the dth preset deployment position at the tth preset time point.

[0041] In this embodiment, the algorithm combines external data and the adjusted temperature difference for comprehensive analysis to obtain the temperature difference analysis coefficient of the electric-fired roller kiln. In the formula, as the adjusted temperature difference decreases and the external adjustment coefficient increases, the corresponding temperature difference analysis coefficient of the electric-fired roller kiln also increases. The external adjustment coefficient is affected by the ambient temperature, ambient humidity, supply rate, and system response speed. When the supply rate is between the minimum and maximum supply rates, the corresponding external adjustment coefficient is larger. When the ambient temperature is closer to the preset constant temperature, the corresponding external adjustment coefficient is larger. When the ambient humidity is closer to the average humidity, the corresponding external adjustment coefficient is also larger. In addition, when the system response speed is larger, the corresponding external adjustment coefficient is also larger, indicating that the influence of external factors on the constant temperature control is smaller. Through comprehensive consideration of the adjusted temperature difference and the external adjustment coefficient, the heating condition of the electric-fired roller kiln is analyzed more accurately, so that corresponding adjustments are taken to timely improve the accuracy of the constant temperature control of the electric-fired roller kiln.

[0042] Specifically, reference is made to external data obtained from a preset database. In a specific embodiment, the preset constant temperature, the maximum supply rate, and the minimum supply rate are set by professional electric roller kiln staff according to specific production conditions, and the average humidity is obtained by performing an average calculation on historical humidity data of the same season.

[0043] Specifically, the parameters involved in the processing of the temperature difference analysis coefficient of the electric-fired roller kiln in this algorithm are interrelated and do not exist independently. Among them, the ambient temperature and ambient humidity are closely related. The ambient humidity in the air will change with the change of ambient temperature. For example, when the ambient temperature rises, the saturated vapor pressure of the air increases, and the same amount of water vapor will appear as a lower ambient humidity; on the contrary, when the ambient temperature decreases, the relative humidity will increase. The supply rate usually refers to the flow rate or mass flow rate of the input material (such as air, gas, water vapor, fuel, etc.), which may be directly or indirectly affected by the ambient temperature and ambient humidity, because the density and specific volume of the supply material will change with environmental conditions; when the ambient humidity is high, condensation or water film may form on the surface of the pipeline or sensor, which will reduce the sensitivity of the sensor and thus delay the response time. At the same time, high ambient humidity may also affect the transportation characteristics of the fuel or air, indirectly affecting the response speed.

[0044] Furthermore, the specific process of obtaining the constant temperature proportion compliance evaluation coefficient is as follows: the thermal energy is numbered according to the category of thermal energy, and the preset proportion of the thermal energy and the corresponding thermal energy data are obtained; based on the temperature control level, all thermal energy is assigned a usage marking coefficient, and the usage marking coefficient assignment indicates that the usage marking coefficient of the thermal energy corresponding to the temperature control level is recorded as 1, and the remaining thermal energy is recorded as 0; the total energy consumption is obtained through the thermal energy data and the corresponding usage marking coefficient, and the reference temperature change rate is obtained from the preset database, and the constant temperature proportion compliance evaluation coefficient is obtained by combining the thermal energy data and the preset proportion.

[0045] The specific limiting expression of the constant temperature ratio conforming to the evaluation coefficient is as follows: In the formula, t represents the number of the preset time point, , Indicates the total number of preset time points. represents the solar energy consumption at the t-th preset time point, represents the wind energy consumption at the tth preset time point, represents the power consumption at the tth preset time point, Indicates the usage mark coefficient corresponding to the solar energy consumption at the t-th preset time point, Indicates the usage mark coefficient corresponding to the wind energy consumption at the t-th preset time point, Indicates the usage mark coefficient corresponding to the power consumption at the t-th preset time point, Indicates the temperature change rate at the tth preset time point ( ), represents the reference temperature change rate, represents the total energy consumption at the tth preset time point, Indicates the preset ratio, It indicates that the constant temperature ratio at the t-th preset time point meets the evaluation coefficient.

[0046] In this embodiment, the algorithm combines the heat energy data, the reference temperature change rate and the preset ratio to obtain the constant temperature proportion compliance evaluation coefficient, wherein the preset ratio represents the result of continuous multiplication of the proportions of each heat energy source, wherein, as the ratio of the product of the ratio of solar energy consumption, wind energy consumption and electric energy consumption to the total consumption respectively and the preset ratio approaches 1, the constant temperature proportion compliance evaluation coefficient becomes larger, indicating that the consumption ratio of multiple energy sources conforms more to the preset ratio, and at the same time, when the ratio of the temperature change rate to the reference temperature change rate approaches 1, the constant temperature proportion compliance evaluation coefficient becomes larger, indicating that the temperature change is more standardized; through the analysis of the constant temperature proportion compliance evaluation coefficient, it is helpful to better understand the compliance of the multi-energy proportion of the constant temperature control of the electric roller kiln, so as to take corresponding measures in time to improve the control accuracy of the heat energy of multiple energy sources, and at the same time realize the dynamic regulation of each heat energy source, which is helpful to make full use of each heat energy source.

[0047] Specifically, the preset ratio and the reference temperature change rate are obtained from a preset database. In a specific embodiment, the preset ratio and the reference temperature change rate are set by professional electric roller kiln staff according to specific production conditions. For example, in the heating stage, the reference temperature change rate is usually in the range of 20-50°C / minute.

[0048] Specifically, the parameters involved in the processing of the constant temperature ratio and the evaluation coefficient in this algorithm are interrelated and do not exist independently. Among them, the unstable output of solar energy may cause fluctuations in the temperature change rate. Solar energy is usually used as an auxiliary heat source in conjunction with other energy sources. Electric energy is usually provided by electric heaters or induction heating. It has a fast response speed and is an important means of controlling the temperature change rate. In the stage where rapid temperature rise is required, electric energy is preferentially used as the main heat source to achieve a higher temperature change rate.

[0049] Specifically, the specific rule for assigning the usage marking coefficient is to assign a usage marking coefficient of 1 to the thermal energy used under different temperature control levels, and to assign a usage marking coefficient of 0 to the thermal energy not used.

[0050] Specifically, the specific expression of the sigmoid function is as follows:

[0051] ;

[0052] in, represents the input of the function, Represents the output of a function.

[0053] Furthermore, the specific process of performing proportion adjustment based on the constant temperature proportion compliance evaluation coefficient is as follows: obtain the proportion evaluation threshold from the preset database and compare it with the constant temperature proportion compliance evaluation coefficient: if the constant temperature proportion compliance evaluation coefficient is not less than the proportion evaluation threshold, no proportion adjustment is performed; if the constant temperature proportion compliance evaluation coefficient is less than the proportion evaluation threshold, a proportion adjustment is performed; the specific process of performing proportion adjustment is as follows: construct a proportion adjustment mapping set of proportion compliance difference and adjustment strength ratio, the proportion compliance difference represents the difference between the constant temperature proportion compliance evaluation coefficient and the proportion evaluation threshold; obtain the corresponding adjustment strength ratio from the proportion adjustment mapping set, and adjust the preset proportion according to the corresponding adjustment strength ratio.

[0054] In this embodiment, by constructing a proportion adjustment mapping set, an accurate correspondence between the proportion compliance error and the adjustment force ratio is achieved, thereby improving the accuracy of the proportion adjustment. This helps to ensure that the adjusted multi-energy supply ratio is more in line with actual needs and further improves the stability and efficiency of the temperature control of the electric-fired roller kiln.

[0055] Specifically, the ratio evaluation threshold is obtained from a preset database. In a specific embodiment, the heat energy data of the multi-energy ratio that does not meet the temperature condition in the historical data is substituted into the specific restriction expression of the constant temperature ratio compliance evaluation coefficient to obtain the corresponding data set, and the data set is averaged to obtain the ratio evaluation threshold.

[0056] Furthermore, the specific process of the stage division evaluation coefficient is as follows: obtain reference kiln temperature data from the preset database, the reference kiln temperature data includes average output power and average kiln pressure, and the reference kiln temperature data is obtained through the historical data of the constant temperature control of the electric roller kiln; perform data preprocessing on the kiln temperature data, and the data preprocessing means de-unitizing the kiln temperature data and unifying the dimension; obtain the preset constant temperature and combine the kiln temperature data and the reference kiln temperature data to obtain the kiln temperature coefficient, and the kiln temperature coefficient includes the temperature coefficient (i.e. ), temperature change rate coefficient (i.e. ), heat source output power coefficient (i.e. ) and the kiln pressure coefficient (i.e. ); The kiln temperature coefficient is summed and processed to obtain the stage division evaluation coefficient. The specific restriction expression of the stage division evaluation coefficient is as follows:

[0057] In the formula, t represents the number of the preset time point, , Indicates the total number of preset time points. represents the temperature in the kiln at the tth preset time point, represents the temperature change rate at the tth preset time point, represents the heat source output power at the tth preset time point, represents the pressure inside the kiln at the tth preset time point, represents the temperature coefficient at the tth preset time point, represents the temperature change rate coefficient at the tth preset time point, represents the heat source output power coefficient at the tth preset time point, represents the pressure coefficient in the kiln at the tth preset time point, Indicates the preset constant temperature. represents the average output power, Indicates the average kiln pressure, represents the stage division evaluation coefficient at the t-th preset time point, and e represents a natural constant.

[0058] In this embodiment, the algorithm combines the kiln temperature coefficient with the comprehensive analysis to obtain the stage division evaluation coefficient, where the stage division evaluation coefficient increases with the increase of the kiln temperature coefficient and decreases with the decrease of the kiln temperature coefficient. As the preset time point passes, the kiln temperature coefficient shows a normal distribution trend of first increasing and then decreasing; Figure 2 As shown, Figure 2 A schematic diagram of the change of the stage division evaluation coefficient provided for the embodiment of the present application, assuming that the total number of preset time points is 100, the constant temperature is 1200°C, the average output power is 50kW, and the average kiln pressure is 1.0Kpa. In the same coordinate system, a change curve of all kiln temperature coefficients is drawn, and the corresponding stage division coefficients are obtained according to the values ​​of all kiln temperature coefficients at the same preset time point, thereby obtaining a change curve of the stage division evaluation coefficient; with the increase of the temperature coefficient, the temperature change rate coefficient, the heat source output power coefficient and the kiln pressure coefficient, the stage division evaluation coefficient increases accordingly, and the image shows an upward trend; with the decrease of the temperature coefficient, the temperature change rate coefficient, the heat source output power coefficient and the kiln pressure coefficient, the stage division evaluation coefficient decreases accordingly, and the image shows a downward trend, which respectively correspond to different stages of the operation of the electric roller kiln.

[0059] It should be added that the temperature coefficient decreases as the temperature in the kiln increases, the temperature change rate coefficient decreases as the temperature change rate increases, the heat source output power coefficient decreases as the heat source output power increases, the kiln pressure coefficient decreases as the kiln pressure increases, and as the preset time point passes, the kiln temperature coefficient shows a normal distribution curve change trend.

[0060] Specifically, the data change table of the stage division coefficient can be obtained through the kiln temperature coefficient, as shown in Table 1:

[0061]

[0062] It can be seen from Table 1 that with the increase of the kiln temperature coefficient, the stage division coefficient also increases. For example, when the temperature coefficient increases from 0.2 in the first row to 0.8 in the fifth row, the temperature change rate coefficient increases from 0.1 in the first row to 0.5 in the fifth row, the heat source output power coefficient increases from 0.3 in the first row to 0.7 in the fifth row, and the kiln pressure coefficient increases from 0.2 in the first row to 0.8 in the fifth row, the corresponding stage division coefficient increases from 1.41 in the first row to 1.91 in the fifth row, which further proves that the kiln temperature coefficient is positively correlated with the stage division coefficient. The analysis of the stage division coefficient can help the control system of the electric-fired roller kiln to more accurately identify the temperature changes, thereby switching the corresponding heat energy in time and realizing more intelligent constant temperature control.

[0063] Specifically, the parameters involved in the processing of the stage division coefficient in this algorithm are interrelated and do not exist independently. Among them, the temperature change rate is directly determined by the heat source output power, heat loss and heat transfer process in the kiln. When the heat source output power increases, the temperature change rate increases, and the temperature in the kiln rises faster. When the heat loss is greater than the heat source output power, the temperature change rate is negative, that is, the temperature in the kiln drops. The increase in the kiln temperature will cause the gas in the kiln to expand, thereby increasing the pressure in the kiln.

[0064] Specifically, the reference kiln temperature data is obtained from a preset database. In a specific embodiment, the reference kiln temperature data is obtained by performing mean operations on the heat source output power and the kiln pressure in the historical data to obtain the average output power and the average kiln pressure.

[0065] Furthermore, the specific method of automatically switching the energy supply based on the stage division evaluation coefficient is as follows: the stage division interval is obtained from the preset database, and the stage division interval includes a start-up interval, a heating interval, a constant temperature interval and a cooling interval; if the stage division evaluation coefficient is within the start-up interval, the supply of heat energy is automatically switched according to the preset supply rules to adapt to the start-up stage of the electric-fired roller kiln, and the preset supply rules include a preset ratio and a corresponding supply of heat energy; if the stage division evaluation coefficient is within the heating interval, the supply of heat energy is automatically switched according to the preset supply rules to adapt to the heating stage of the electric-fired roller kiln; if the stage division evaluation coefficient is within the constant temperature interval, the supply of heat energy is automatically switched according to the preset supply rules to adapt to the constant temperature stage of the electric-fired roller kiln; if the stage division evaluation coefficient is within the cooling interval, the supply of heat energy is automatically switched according to the preset supply rules to adapt to the cooling stage of the electric-fired roller kiln.

[0066] In this embodiment, when it is detected that the electric-fired roller kiln is in different stages, the heat energy supply is automatically switched. For example, if it is detected that the electric-fired roller kiln is in the constant temperature stage, the currently supplied heat energy is switched according to the preset supply rules of the constant temperature stage. For example, when switching from the heating stage to the constant temperature stage, the corresponding supply ratio of electric energy in the heat energy may be switched from 0.8 to 0.2, and the supply ratio of solar energy may be switched from 0.2 to 0.8. By automatically switching the supply of heat energy according to the different operating stages of the electric-fired roller kiln, it can be ensured that the most appropriate heat input is obtained in each stage, thereby avoiding energy waste and unnecessary cost expenditure, which helps to improve the overall energy utilization efficiency and reduce production costs.

[0067] Specifically, the stage division interval is obtained from a preset database. In a specific embodiment, the kiln temperature data of the startup phase in the historical data of the electric-fired roller kiln is substituted into the specific restriction expression of the stage division evaluation coefficient to obtain a corresponding data set, and the data set is averaged to obtain a first mean value, the kiln temperature data of the rising phase in the historical data of the electric-fired roller kiln is substituted into the specific restriction expression of the stage division evaluation coefficient to obtain a corresponding data set, and the data set is averaged to obtain a second mean value, the kiln temperature data of the constant temperature phase in the historical data of the electric-fired roller kiln is substituted into the specific restriction expression of the stage division evaluation coefficient to obtain a corresponding data set, and the data set is averaged to obtain a third mean value, then the range corresponding to 0 to the first mean value is the startup interval, the interval corresponding to the first mean value to the second mean value is the rising interval, the interval corresponding to the second mean value to the third mean value is the constant temperature interval, otherwise it is a cooling interval.

[0068] The embodiment of the present application provides a constant temperature control method for an electric-fired roller kiln based on the mixed use of multiple energy sources, comprising the following steps: obtaining the temperature of each preset deployment position at a preset time point of the electric-fired roller kiln, and obtaining the corresponding adjusted temperature difference through analysis to determine whether to perform constant temperature control; obtaining the temperature difference analysis coefficient of the electric-fired roller kiln through the adjusted temperature difference of each preset deployment position and external data, and obtaining the temperature control level according to the temperature difference analysis coefficient of the electric-fired roller kiln, and the temperature difference analysis coefficient of the electric-fired roller kiln is used to comprehensively reflect the stability of the temperature difference change of the electric-fired roller kiln; supplying heat energy according to the temperature control level and obtaining heat energy data, combining the obtained heat energy data with the preset ratio and the adjusted temperature difference to obtain a constant temperature ratio compliance evaluation coefficient, adjusting the ratio based on the constant temperature ratio compliance evaluation coefficient, and the constant temperature ratio compliance evaluation coefficient is used to evaluate the compliance degree of the preset ratio of multiple energy sources; combining the kiln temperature data of the electric-fired roller kiln obtained in real time with the heat energy data to obtain a stage division evaluation coefficient, and automatically switching the energy supply based on the stage division evaluation coefficient, and the stage division evaluation coefficient is used to determine the temperature control stage of the electric-fired roller kiln.

[0069] In this embodiment, the temperature of the electric-fired roller kiln is precisely controlled by real-time monitoring of the temperature of the electric-fired roller kiln, calculating the temperature difference analysis coefficient, determining the temperature control level, precisely controlling the heat energy supply and proportion adjustment, and automatically switching the energy supply. This method not only improves the timeliness and accuracy of the temperature control of the electric-fired roller kiln, but also improves the energy utilization efficiency and reduces the production cost. At the same time, this method also enhances the stability and reliability of the control system of the electric-fired roller kiln, providing a strong guarantee for the quality control and production efficiency of the tile sintering process.

[0070] To summarize, the embodiment of the present application obtains the temperature difference analysis coefficient of the electric-fired roller kiln by adjusting the temperature difference and external data to obtain the temperature control level, and supplies heat energy according to the temperature control level while obtaining heat energy data, and then combines the obtained heat energy data with the preset ratio and the adjusted temperature difference to obtain the constant temperature ratio in accordance with the evaluation coefficient for proportion adjustment, and finally combines the real-time obtained kiln temperature data with the heat energy data to obtain the stage division evaluation coefficient and automatically switches the energy supply accordingly, thereby realizing the dynamic regulation and automation of multi-energy hybrid control, thereby improving the accuracy of constant temperature control of the electric-fired roller kiln with multi-energy hybrid use, and effectively solving the problem of inaccurate constant temperature control of the electric-fired roller kiln with multi-energy hybrid use in the prior art.

[0071] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0072] The present invention is described with reference to flowcharts and / or block diagrams of systems, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0073] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0074] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0075] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0076] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. The constant temperature control system of electric roller kiln based on the mixed use of multiple energy sources is characterized by: include: Electric-burning roller kiln temperature detection module, constant temperature dynamic control module, multi-energy proportional control module and automatic temperature control module; The electric roller kiln temperature detection module is used to obtain the temperature of each preset deployment position of the electric roller kiln at a preset time point, and obtain the corresponding adjustment temperature difference through analysis to determine whether to perform constant temperature control; The constant temperature dynamic control module is used to obtain the temperature difference analysis coefficient of the electric-fired roller kiln through the adjusted temperature difference of each preset deployment position and external data, and obtain the temperature control level according to the temperature difference analysis coefficient of the electric-fired roller kiln. The temperature difference analysis coefficient of the electric-fired roller kiln is used to comprehensively reflect the stability of the temperature difference change of the electric-fired roller kiln; The multi-energy proportion control module is used to supply heat energy and obtain heat energy data according to the temperature control level, combine the obtained heat energy data with the preset proportion and adjust the temperature difference to obtain the constant temperature proportion compliance evaluation coefficient, and adjust the proportion based on the constant temperature proportion compliance evaluation coefficient. The constant temperature proportion compliance evaluation coefficient is used to evaluate the compliance degree of the preset proportion of multiple energy sources; The automatic temperature control module is used to combine the real-time acquired kiln temperature data with the heat energy data to obtain a stage division evaluation coefficient, and automatically switch the energy supply based on the stage division evaluation coefficient, and the stage division evaluation coefficient is used to determine the temperature control stage of the electric-fired roller kiln; The specific process of determining whether to perform constant temperature control is as follows: Acquire reference judgment data from a preset database, wherein the reference judgment data includes a temperature deviation and a preset fault tolerance ratio; Compare the adjusted temperature difference of each preset deployment position with the temperature deviation in turn: If the adjusted temperature difference is not greater than the temperature deviation, the preset deployment position is marked as 1, and the adjusted temperature difference represents the difference between the temperature of each preset deployment position and the preset constant temperature; If the adjusted temperature difference is greater than the temperature deviation, the preset deployment position is marked as 0; Counting the number of preset deployment positions marked as 0, combining the statistical result with the total number of preset deployment positions to obtain the constant temperature out-of-control point ratio, wherein the constant temperature out-of-control point ratio is represented by the ratio of the statistical result to the total number of preset deployment positions; Compare the thermostatic out-of-control point ratio with the preset fault tolerance ratio: If the ratio of thermostatic out-of-control points is not greater than the preset fault tolerance ratio, thermostatic control will not be performed; If the ratio of thermostatic out-of-control points is greater than the preset fault tolerance ratio, the function of the thermostatic dynamic control module is executed; The external data includes ambient temperature, ambient humidity, supply rate, and system response speed; The thermal energy data includes temperature change rate, solar energy consumption, wind energy consumption and electrical energy consumption; The kiln temperature data include the kiln temperature, temperature change rate, heat source output power and kiln pressure; The specific process of obtaining the temperature difference analysis coefficient of the electric-fired roller kiln is as follows: The preset time points and the preset deployment positions are numbered respectively, and reference external data are obtained from a preset database, wherein the reference external data includes a preset constant temperature, an average humidity, a maximum supply rate, and a minimum supply rate; Obtaining an external adjustment coefficient according to the external data and the reference external data, wherein the external adjustment coefficient is used to quantify the influence of external factors on constant temperature control; Preprocessing the system response speed, wherein the preprocessing is used to normalize the system response speed; Get the adjusted temperature difference and combine it with the external adjustment coefficient to get the temperature difference analysis coefficient of the electric roller kiln; The specific process of obtaining the constant temperature ratio compliance evaluation coefficient is as follows: Number the thermal energy according to the type of thermal energy, and obtain the preset proportion corresponding to the thermal energy and the corresponding thermal energy data; Based on the temperature control level, all thermal energy sources are assigned usage marking coefficients; The total energy consumption is obtained through the heat energy data and the corresponding usage marking coefficient, and the reference temperature change rate is obtained from the preset database, and the constant temperature ratio compliance evaluation coefficient is obtained by combining the heat energy data and the preset ratio; The specific process of dividing the evaluation coefficients in the stages is as follows: Acquire reference kiln temperature data from a preset database, wherein the reference kiln temperature data includes average output power and average kiln internal pressure; Performing data preprocessing on the kiln temperature data, wherein the data preprocessing means removing the unit of the kiln temperature data and unifying the dimension; Obtaining a preset constant temperature and combining it with kiln temperature data and reference kiln temperature data to obtain a kiln temperature coefficient, wherein the kiln temperature coefficient includes a temperature coefficient, a temperature change rate coefficient, a heat source output power coefficient, and a kiln pressure coefficient; The kiln temperature coefficients are summed and processed to obtain the stage division evaluation coefficients.

2. The constant temperature control system for an electric roller kiln based on the mixed use of multiple energy sources as claimed in claim 1 is characterized in that: The specific limiting expression of the constant temperature ratio conforming to the evaluation coefficient is as follows: In the formula, t represents the number of the preset time point, , Indicates the total number of preset time points. represents the solar energy consumption at the t-th preset time point, represents the wind energy consumption at the tth preset time point, represents the power consumption at the tth preset time point, Indicates the usage mark coefficient corresponding to the solar energy consumption at the t-th preset time point, Indicates the usage mark coefficient corresponding to the wind energy consumption at the t-th preset time point, Indicates the usage mark coefficient corresponding to the power consumption at the t-th preset time point, represents the temperature change rate at the tth preset time point, represents the reference temperature change rate, represents the total energy consumption at the tth preset time point, Indicates the preset ratio, It indicates that the constant temperature ratio at the t-th preset time point meets the evaluation coefficient.

3. The constant temperature control system for an electric roller kiln based on the mixed use of multiple energy sources as claimed in claim 1 is characterized in that: The specific process of adjusting the ratio based on the constant temperature ratio meets the evaluation coefficient is as follows: Get the ratio evaluation threshold from the preset database and compare it with the constant temperature ratio compliance evaluation coefficient: If the constant temperature ratio meets the evaluation coefficient and is not less than the ratio evaluation threshold, no ratio adjustment is performed; If the constant temperature ratio meets the evaluation coefficient and is less than the ratio evaluation threshold, the ratio is adjusted; The specific process of adjusting the ratio is as follows: Constructing a scale adjustment mapping set of scale compliance difference and adjustment strength scale, wherein the scale compliance difference represents the difference between the constant temperature scale compliance evaluation coefficient and the scale evaluation threshold; The corresponding adjustment intensity ratio is obtained from the ratio adjustment mapping set, and the preset ratio is adjusted according to the corresponding adjustment intensity ratio.

4. The constant temperature control system for an electric roller kiln based on the mixed use of multiple energy sources as claimed in claim 1, characterized in that: The specific method of automatically switching energy supply based on the stage division evaluation coefficient is as follows: Acquire a stage division interval from a preset database, wherein the stage division interval includes a start-up interval, a temperature rise interval, a constant temperature interval, and a cooling interval; If the stage division evaluation coefficient is within the start-up interval, the heat energy supply is automatically switched according to a preset supply rule to adapt to the start-up stage of the electric roller kiln, wherein the preset supply rule includes a preset ratio and a corresponding heat energy supply; If the stage division evaluation coefficient is within the temperature rise range, the heat energy supply is automatically switched according to the preset supply rules to adapt to the temperature rise stage of the electric roller kiln; If the stage division evaluation coefficient is within the constant temperature range, the heat energy supply is automatically switched according to the preset supply rules to adapt to the constant temperature stage of the electric roller kiln; If the stage division evaluation coefficient is within the cooling interval, the heat energy supply is automatically switched according to the preset supply rules to adapt to the cooling stage of the electric-fired roller kiln.

5. A method for applying a constant temperature control system of an electric roller kiln based on the mixed use of multiple energy sources as described in any one of claims 1 to 4, characterized in that: The following steps are involved: Obtain the temperature of each preset deployment position at the preset time point of the electric roller kiln, and obtain the corresponding adjustment temperature difference through analysis to determine whether to perform constant temperature control; The temperature difference analysis coefficient of the electric-fired roller kiln is obtained by adjusting the temperature difference of each preset deployment position and external data, and the temperature control level is obtained according to the temperature difference analysis coefficient of the electric-fired roller kiln. The temperature difference analysis coefficient of the electric-fired roller kiln is used to comprehensively reflect the stability of the temperature difference change of the electric-fired roller kiln; Supplying heat energy and acquiring heat energy data according to the temperature control level, combining the acquired heat energy data with the preset ratio and the adjusted temperature difference to obtain a constant temperature ratio compliance evaluation coefficient, and adjusting the ratio based on the constant temperature ratio compliance evaluation coefficient, wherein the constant temperature ratio compliance evaluation coefficient is used to evaluate the compliance degree of the preset ratio of multiple energy sources; The real-time kiln temperature data and heat energy data are combined to obtain a stage division evaluation coefficient, and the energy supply is automatically switched based on the stage division evaluation coefficient, wherein the stage division evaluation coefficient is used to determine the temperature control stage of the electric-fired roller kiln; The specific process of determining whether to perform constant temperature control is as follows: Acquire reference judgment data from a preset database, wherein the reference judgment data includes a temperature deviation and a preset fault tolerance ratio; Compare the adjusted temperature difference of each preset deployment position with the temperature deviation in turn: If the adjusted temperature difference is not greater than the temperature deviation, the preset deployment position is marked as 1, and the adjusted temperature difference represents the difference between the temperature of each preset deployment position and the preset constant temperature; If the adjusted temperature difference is greater than the temperature deviation, the preset deployment position is marked as 0; Counting the number of preset deployment positions marked as 0, combining the statistical result with the total number of preset deployment positions to obtain the constant temperature out-of-control point ratio, wherein the constant temperature out-of-control point ratio is represented by the ratio of the statistical result to the total number of preset deployment positions; Compare the thermostatic out-of-control point ratio with the preset fault tolerance ratio: If the ratio of thermostatic out-of-control points is not greater than the preset fault tolerance ratio, thermostatic control will not be performed; If the ratio of thermostatic out-of-control points is greater than the preset fault tolerance ratio, the function of the thermostatic dynamic control module is executed.

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