Preheating device and system for coal gangue roasting

Abstract

The invention provides a preheating device and system for coal gangue roasting, and belongs to the technical field of control design. The demand module is used for acquiring characteristics of coal gangue and determining roasting preheating requirements; the model selection module is used for selecting the type and parameters of a preheating device based on roasting preheating requirements and installing the preheating device; the index module is used for formulating roasting indexes of the coal gangue according to the characteristics of the coal gangue and the aim of the preheating device; the thermal load module is used for starting an operation preheating device and judging whether the thermal load meets a preset standard or not according to the roasting index; and the adjusting module is used for adjusting the control parameters of the preheating device according to the judgment result of the thermal load of the preheating device. The roasting efficiency is improved, the preheating process is optimized, energy consumption is reduced, and stable coal gangue quality is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of control optimization, and particularly to a preheating device and system for coal gangue roasting. Background Art

[0002] At present, coal gangue is a waste generated during coal mining, containing a large amount of harmful components. If not treated, it will pollute the environment. With the strengthening of environmental protection policies, the resource utilization of coal gangue has become particularly important. Roasting is one of the common processes in coal gangue treatment, which can convert its harmful components into harmless substances and provide good conditions for subsequent treatment or utilization. However, traditional coal gangue roasting processes usually have problems such as high energy consumption and low efficiency, especially in the preheating stage.

[0003] Through the control of the preheating stage, the volatile components in the coal gangue are extracted. In the roasting stage, only the external heat source is used to control the temperature to achieve precise temperature control, and the crystal form transformation at a specific temperature is realized. Because the volatile components are easy to burn, if they participate in the roasting stage, it will cause local high temperature and lead to inaccurate temperature control and poor crystal form transformation effect.

[0004] In the roasting stage, since there is no volatile component in the gangue participating in combustion and the external heat source is used for heating, the roasting temperature of the coal gangue is easier to control. The roasting temperature in the roasting stage is 900 - 1200 degrees. When metakaolin in the coal gangue transforms into mullite, a large amount of amorphous silica is discharged. This part of silicon is easy to remove in the subsequent desilication, which is beneficial to improving the aluminum-silicon ratio. If the temperature is inaccurate and too high, the discharged amorphous silicon will combine with free alumina to form mullite. If mullite is formed, the silicon is not easy to remove and the aluminum-silicon ratio is not easy to increase. Therefore, inaccurate temperature control easily leads to energy consumption waste and unstable treatment effect.

[0005] Therefore, the present invention proposes a preheating device and system for coal gangue roasting. Summary of the Invention

[0006] The present invention provides a preheating device and system for coal gangue roasting, which is used to analyze the characteristics of coal gangue, determine the preheating requirements for roasting, select and install a suitable preheating device, formulate roasting indexes, monitor the heat load and adjust the control parameters according to the feedback, so as to realize an efficient and energy-saving coal gangue roasting process and improve the production efficiency and environmental protection effect.

[0007] On the one hand, the present invention provides a preheating device for coal gangue roasting, including: Requirement module: Obtain the characteristics of coal gangue and determine the preheating requirements for roasting; Model selection module: Select the type and parameters of the preheating device based on the preheating requirements for roasting and install the preheating device; Index module: Combining the characteristics of coal gangue and the purpose of the preheating device, formulate the roasting index of coal gangue; Heat load module: Start and run the preheating device, and determine whether the heat load meets the preset standard according to the roasting index; Adjustment module: Adjust the control parameters of the preheating device according to the judgment result of the heat load of the preheating device.

[0008] On the other hand, the demand module includes: Chemical analysis unit: Using the sample coal gangue as the test material, obtain the chemical characteristics of coal gangue through chemical analysis methods; Physical unit: Obtain the first physical characteristics of coal gangue through physical analysis methods, and combine the national standard parameters of coal gangue to obtain the physical characteristics of coal gangue; The chemical characteristics and the physical characteristics of the coal gangue constitute the characteristics of the coal gangue.

[0009] On the other hand, the demand module further includes: Roasting preheating requirement unit: Based on the physical characteristics of coal gangue, determine the particle size and thickness of coal gangue, and combine the chemical characteristics of coal gangue to obtain the preheating heat requirement of coal gangue as: ; where represents the preheating heat requirement of coal gangue, represents the preheating mass flow rate, represents the specific heat capacity of coal gangue, represents the preset preheating temperature change, represents the activation energy of coal gangue, represents the preheating gas constant of coal gangue, which is related to the particle size and thickness of coal gangue; The preheating heat requirement of coal gangue is the basic roasting preheating heat requirement of the preheating device.

[0010] On the other hand, the model selection module includes: Type selection unit: According to the roasting preheating requirements and system design, select a preheating cylinder as the preheating device. Among them, the preheating cylinder uniformly heats the coal gangue through a heating element, and then monitors the temperature in the preheating cylinder to complete the preheating of the coal gangue; Installation and configuration unit: Install the preheating device according to the preset standard installation parameters, and conduct tests on the preheating device to check whether the performance parameters of the preheating device meet the standard requirements.

[0011] On the other hand, the index module includes: Index unit: According to the characteristics of coal gangue and roasting preheating requirements, generate the preheating process for roasting, and combine the purpose of the preheating device to determine the standard preheating value for all roasting parameters of roasting; The roasting parameters and their standard preheating values generate the roasting indexes of gangue.

[0012] On the other hand, the heat load module includes: A starting unit: According to the preheating process of roasting, start and run the preheating device, and obtain the original data of the roasting parameters based on the sensing equipment of the preheating device; A standardizing unit: Clean the original data of the roasting parameters, and then standardize them according to the national standard units to obtain the standard data of the roasting parameters; A heat load unit: Obtain the roasting heat load at any preheating moment according to the standard data of the roasting parameters as follows: ; where represents the heat load at time t, represents the mass flow rate of gangue, represents the specific heat capacity of gangue, represents the temperature change at time t, represents the initial moisture content of gangue, represents the latent heat of evaporation at time t, represents the initial volatile content of gangue, represents the mass flow rate of the phase change substance of gangue at time t, represents the preset heat of phase change of gangue; If the absolute value deviation between the heat load at any moment and the heat load standard value of the preheating device is greater than the standard threshold, it is determined that the heat load does not meet the standard. Otherwise, continue preheating.

[0013] On the other hand, the adjustment module includes: A control model unit: Based on the standard preheating values of all roasting parameters and the preheating heat demand of gangue as constraint conditions, input the preset control parameters into the control model; An adjustment unit: If the heat load is less than the heat load standard value, it means insufficient heating. If the heat load is greater than the heat load standard value, it means excessive heat output; Input the difference between the heat load and the heat load standard value of the preheating device into the control model and output the first control result; Adjust the preset control parameters according to the fitting deviation between the constraint conditions and the first control result, and iterate until the fitting deviation between the constraint conditions and the control result approaches 0; The control parameters are the optimal control parameters. Based on the optimal control parameters, obtain the temperature control parameters and air flow control parameters of the preheating device, and adjust and process the equipment of the preheating device.

[0014] On the other hand, a preheating system for gangue roasting, used to execute the preheating process of any of the preheating systems for gangue roasting described above, includes: Step 1: Obtain the characteristics of coal gangue and determine the requirements for roasting preheating; Step 2: Select the type and parameters of the preheating device based on the requirements for roasting preheating, and install the preheating device; Step 3: Combine the characteristics of coal gangue and the purpose of the preheating device to formulate the roasting index of coal gangue; Step 4: Start and run the preheating device, and determine whether the heat load meets the preset standard according to the roasting index; Step 5: Adjust the control parameters of the preheating device according to the judgment result of the heat load of the preheating device.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a preheating device and system for coal gangue roasting, which can analyze the characteristics of coal gangue, determine the requirements for roasting preheating, select and install a suitable preheating device, formulate roasting indexes, monitor the heat load and adjust the control parameters according to the feedback, so as to realize an efficient and energy-saving coal gangue roasting process, and improve the production efficiency and environmental protection effect. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic structural diagram of a preheating device for coal gangue roasting provided by an embodiment of the present invention; Figure 2 It is a schematic structural diagram of a preheating system for coal gangue roasting provided by an embodiment of the present invention; Figure 3 It is a structural diagram of the preheating device based on the preheating cylinder. Detailed Embodiments

[0018] To make the purpose, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention in conjunction with the drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0019] Embodiment 1: As Figure 1 shown, a preheating device for coal gangue roasting provided by an embodiment of the present invention includes: Requirement module: Obtain the characteristics of coal gangue and determine the roasting preheating requirements; Model selection module: Select the type and parameters of the preheating device based on the roasting preheating requirements, and install the preheating device; Index module: Develop the roasting indexes of coal gangue by combining the characteristics of coal gangue and the purpose of the preheating device; Heat load module: Start and operate the preheating device, and determine whether the heat load meets the preset standard according to the roasting indexes; Adjustment module: Adjust the control parameters of the preheating device according to the judgment result of the heat load of the preheating device.

[0020] In this embodiment, the characteristics include: composition, moisture, volatile matter, calorific value, particle size, etc.

[0021] In this embodiment, the roasting preheating requirements refer to the conditions for ensuring the ideal treatment effect of coal gangue during the roasting process.

[0022] In this embodiment, the type of the preheating device is selected according to the roasting preheating requirements of coal gangue, the characteristics of coal gangue, and the required heat load, including: rotary kiln, fluidized bed, multi-stage preheating furnace, etc.

[0023] In this embodiment, the parameters refer to the key technical parameters that need to be considered and adjusted during the design, selection, operation, and regulation of the preheating device, such as: temperature, pressure, gas flow rate, mass flow rate, etc.

[0024] In this embodiment, the preheating device is a device used to heat the raw materials during the roasting process. By providing heat, the raw materials are heated to the required temperature, thus preparing for the subsequent roasting or chemical reaction process.

[0025] In this embodiment, the roasting indexes refer to the operating parameters used to measure and control the preheating and roasting effects of coal gangue during the roasting process, including: temperature, time, gas, heat load, etc.

[0026] In this embodiment, the heat load refers to the amount of heat energy required to be provided by the preheating device during the roasting process.

[0027] In this embodiment, the judgment result is the conclusion obtained by evaluating the operating state of the preheating device and the roasting indexes in the heat load module.

[0028] In this embodiment, the control parameters are the key variables used to adjust and optimize the operation of the preheating device during the roasting preheating process, such as: temperature control, gas flow control, etc.

[0029] The working principle and beneficial effects of the above technical solution are as follows: By analyzing the characteristics of coal gangue, reasonably selecting a preheating device and formulating roasting indexes, real-time monitoring the heat load and adjusting control parameters according to the actual situation, an efficient and energy-saving roasting and preheating process is achieved, the resource utilization effect of coal gangue is improved, and energy consumption and environmental pollution are reduced.

[0030] Example 2: Based on the above Example 1, the demand module includes: Chemical analysis unit: Using the sample coal gangue as the test material, the chemical characteristics of coal gangue are obtained through chemical analysis methods. Physical unit: The first physical characteristics of coal gangue are obtained through physical analysis methods, and the physical characteristics of coal gangue are obtained by combining with the national standard parameters of coal gangue. The chemical characteristics and the physical characteristics of coal gangue constitute the characteristics of coal gangue.

[0031] In this example, the sample coal gangue refers to the coal gangue sample collected from coal mines or coal processing processes and used as the object of research and analysis.

[0032] In this example, the chemical characteristics refer to the properties of chemical components and elements contained in coal gangue, including: acidity and alkalinity, element content, mineral composition, etc.

[0033] In this example, the physical characteristics refer to the physical manifestations and properties of coal gangue, including: particle size distribution, specific gravity and density, moisture content, etc.

[0034] In this example, the national standard parameters refer to the regulations and standards formulated by the state or relevant standard institutions regarding the quality, performance, test methods, etc. of materials such as coal gangue.

[0035] The working principle and beneficial effects of the above technical solution are as follows: By chemically and physically analyzing and testing the chemical and physical characteristics of coal gangue, and combining with the national standard parameters, the characteristics of coal gangue are comprehensively evaluated, providing accurate data support for the optimization of the roasting and preheating process, and helping to improve the treatment effect and resource utilization efficiency.

[0036] Example 3: Based on the above Example 1, the demand module further includes: Roasting and preheating requirement unit: Based on the physical characteristics of coal gangue, the particle size and thickness of coal gangue are determined, and the preheating heat requirement of coal gangue is obtained by combining with the chemical characteristics of coal gangue as: ; where represents the preheating heat requirement of coal gangue, represents the preheating mass flow rate, represents the specific heat capacity of coal gangue, Indicates the preset preheating temperature change. Indicates the activation energy of coal gangue. Indicates the preheating gas constant of coal gangue, which is related to the particle size and thickness of coal gangue. The preheating heat demand of coal gangue is the basic roasting preheating heat demand of the preheating device.

[0037] In this embodiment, the preheating heat demand refers to the heat required to heat the coal gangue to the preset preheating temperature during the roasting process.

[0038] In this embodiment, the preheating mass flow rate refers to the mass flow rate of coal gangue per unit time during the roasting preheating process.

[0039] In this embodiment, the specific heat capacity is the heat absorbed by a substance per unit mass when the temperature increases by 1 degree.

[0040] The working principle and beneficial effects of the above technical solution are: By combining the physical and chemical properties of coal gangue, its preheating heat demand is determined, providing a scientific basis for the roasting preheating process. According to factors such as the particle size, thickness, and activation energy of coal gangue, the required heat is accurately calculated, the design of the preheating device is optimized, and the energy efficiency and processing effect are improved.

[0041] Example 4: Based on the above Example 1, the selection module includes: Type selection unit: According to the roasting preheating requirements and system design, a preheating cylinder is selected as the preheating device. Among them, the preheating cylinder uniformly heats the coal gangue through a heating element, and then monitors the temperature in the preheating cylinder to complete the preheating of the coal gangue. Installation and configuration unit: Install the preheating device according to the preset standard installation parameters, and conduct tests on the preheating device to check whether the performance parameters of the preheating device meet the standard requirements.

[0042] In this embodiment, the structure diagram of the preheating device based on the preheating cylinder is as Figure 3 shown.

[0043] In this embodiment, system design refers to a series of activities such as system planning, scheme formulation, component selection, layout design, and process optimization in the engineering field according to specific functional requirements, technical standards, economic conditions, and operating environments.

[0044] In this embodiment, the preheating cylinder is a device for heating materials, commonly used in industrial processes, especially in occasions where uniform heating and temperature control of materials are required.

[0045] In this embodiment, the heating element refers to a device for converting electrical energy or other energy into heat energy.

[0046] In this embodiment, the preset standard installation parameters refer to a series of standardized parameters for the equipment installation and commissioning process formulated according to design requirements and technical specifications when installing the preheating device, such as installation position parameters, temperature control parameters, heating element parameters, etc.

[0047] In this embodiment, the performance parameters refer to a series of technical indicators used to measure the working effect of the preheating cylinder and whether it meets the design requirements during the installation, commissioning and operation processes, such as heating power, temperature control response time, etc.

[0048] In this embodiment, the standard requirements The working principle and beneficial effects of the above technical solution are: By selecting the preheating cylinder as the heating device, uniformly heating the coal gangue using the heating element, and monitoring the temperature to ensure the preheating effect. During the installation and testing processes, ensure that the performance of the preheating device meets the standard requirements, optimize the heating efficiency and system stability, and improve the preheating treatment effect of the coal gangue.

[0049] Embodiment 5: Based on the above Embodiment 1, the index module includes: Index unit: Generate the preheating process for roasting according to the characteristics of the coal gangue and the roasting preheating requirements, and combine the purpose of the preheating device to determine the standard preheating values for all roasting parameters of the roasting; The roasting parameters and their standard preheating values generate the roasting indexes of the coal gangue.

[0050] In this embodiment, the preheating process includes: feeding, preliminary heating, temperature increase, and completion of preheating.

[0051] In this embodiment, the standard preheating value refers to the ideal values of temperature, time and other relevant parameters required to ensure the effective roasting of the coal gangue during the roasting process of the coal gangue, based on the characteristics of the coal gangue and the design requirements of the preheating device, such as preheating temperature, preheating time, heating rate, etc.

[0052] In this embodiment, the roasting parameters refer to various parameters that need to be monitored during the roasting process of the coal gangue, including: temperature, pressure, gas flow rate, etc.

[0053] The working principle and beneficial effects of the above technical solution are: By combining the characteristics of the coal gangue and the roasting preheating requirements, formulating the standard preheating values, and setting reasonable parameters for the roasting process. The generated roasting indexes provide scientific guidance for the process, ensure the high efficiency of the preheating process and the high-quality roasting of the coal gangue, and improve the resource utilization effect.

[0054] Embodiment 6: Based on the above Embodiment 5, the heat load module includes: Startup unit: According to the preheating process of roasting, start and run the preheating device, and obtain the original data of roasting parameters based on the sensing equipment of the preheating device; Standardization unit: Clean the original data of roasting parameters, and then standardize it according to the national standard units to obtain the standard data of roasting parameters; Heat load unit: Obtain the roasting heat load at any preheating moment according to the standard data of roasting parameters as: ; where, represents the heat load at time t, represents the mass flow rate of coal gangue, represents the specific heat capacity of coal gangue, represents the temperature change at time t, represents the initial moisture content of coal gangue, represents the latent heat of evaporation at time t, represents the initial volatile content of coal gangue, represents the mass flow rate of the phase change substance of coal gangue at time t, represents the preset heat of phase change of coal gangue; If the absolute value deviation between the heat load at any moment and the standard value of the heat load of the preheating device is greater than the standard threshold, it is determined that the heat load does not meet the standard. Otherwise, continue preheating.

[0055] In this embodiment, the sensing equipment is a device for real-time monitoring and measuring various parameters during the roasting process, and the types include: temperature, flow rate, pressure, humidity, heat flux, etc.

[0056] In this embodiment, the original data refers to the real-time measurement data obtained from the sensors of the roasting preheating device without any processing or conversion.

[0057] In this embodiment, data cleaning is to remove duplicate data, handle missing values and outliers, etc. in data preprocessing.

[0058] In this embodiment, the national standard units refer to the unit system that complies with national regulations and standards.

[0059] In this embodiment, standardization means converting the original data into a unified standard format and units to make it comply with certain regulations and specifications.

[0060] In this embodiment, the standard data is the data after data cleaning and standardization.

[0061] In this embodiment, the latent heat of evaporation refers to the heat absorbed by a unit mass of substance during the evaporation process.

[0062] In this embodiment, the initial volatile content refers to the proportion of substances in coal gangue that can be volatilized during the roasting heating process.

[0063] In this embodiment, the preset heat of phase change refers to the heat required when certain substances in gangue undergo phase changes (such as solid to liquid, liquid to gas, etc.) during the heating process.

[0064] In this embodiment, the standard value of heat load refers to the standard heat load set when the preheating device is operating normally.

[0065] The working principle and beneficial effects of the above technical solution are as follows: By starting the preheating device and obtaining the original data of roasting parameters, calculating the heat load after standardization processing, ensuring that the heat load at each preheating moment meets the standard. If the heat load deviation exceeds the threshold, adjust the preheating process to ensure the stable preheating effect of gangue and improve the processing accuracy and efficiency.

[0066] Embodiment 7: Based on the above Embodiment 6, the adjustment module includes: Control model unit: Based on the standard preheating values of all roasting parameters and the preheating heat requirement of gangue as constraint conditions, input the preset control parameters into the control model; Adjustment unit: If the heat load is less than the standard value of heat load, it indicates insufficient heating. If the heat load is greater than the standard value of heat load, it indicates excessive heat output; Input the difference between the heat load and the standard value of heat load of the preheating device into the control model and output the first control result; Adjust the preset control parameters according to the fitting deviation between the constraint conditions and the first control result, and iterate until the fitting deviation between the constraint conditions and the control result approaches 0; The control parameters are the optimal control parameters. Based on the optimal control parameters, obtain the temperature control parameters and air flow control parameters of the preheating device, and adjust and process the equipment of the preheating device.

[0067] In this embodiment, the constraint conditions refer to the restrictive conditions that must be satisfied during the operation of the preheating device.

[0068] In this embodiment, the preset control parameters refer to the parameters preset at the start of the control system operation for adjusting the system state.

[0069] In this embodiment, the control model is a dynamic control algorithm model based on feedback and optimization.

[0070] In this embodiment, the first control result is the preliminary adjustment result based on the heat load difference.

[0071] In this embodiment, the fitting deviation refers to the difference between the model prediction result and the actual data.

[0072] In this embodiment, the optimal control parameter refers to the control parameter that enables the system to achieve the best performance after adjustment and iteration processes.

[0073] In this embodiment, the temperature control parameter refers to the control variable used to adjust the internal temperature of the preheating device, for example: the adjustment of the power of the temperature control equipment.

[0074] In this embodiment, the air flow control parameter refers to the control variable used to adjust factors such as the air flow rate, air flow direction, and air flow distribution in the preheating device, for example, the adjustment of the air flow temperature and air flow temperature.

[0075] The working principle and beneficial effects of the above technical solution are: The control model adjusts the heat load to the standard value according to the roasting parameters and preheating heat demand, and determines the optimal control scheme through iterative optimization of the control parameters. By precisely adjusting the temperature and air flow, it ensures the efficient and stable operation of the preheating device, improves the preheating effect and energy efficiency of coal gangue.

[0076] Embodiment 8: As Figure 2 shown, a preheating system for coal gangue roasting provided by an embodiment of the present invention is used to execute the preheating process of any one of the preheating devices for coal gangue roasting, and includes: Step 1: Obtain the characteristics of coal gangue and determine the roasting preheating requirements; Step 2: Select the type and parameters of the preheating device based on the roasting preheating requirements, and install the preheating device; Step 3: Formulate the roasting index of coal gangue by combining the characteristics of coal gangue and the purpose of the preheating device; Step 4: Start the operation of the preheating device, and determine whether the heat load meets the preset standard according to the roasting index; Step 5: Adjust the control parameters of the preheating device according to the judgment result of the heat load of the preheating device.

[0077] The working principle and beneficial effects of the above technical solution are: By analyzing the characteristics of coal gangue, reasonably selecting the preheating device and formulating the roasting index, real-time monitoring the heat load and adjusting the control parameters according to the actual situation, an efficient and energy-saving roasting preheating process is realized, the resource utilization effect of coal gangue is improved, and energy consumption and environmental pollution are reduced.

[0078] Finally, it should be noted that: The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: They can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A preheating device for coal gangue roasting, characterized in that: include: Demand module: obtain the characteristics of coal gangue and determine the roasting preheating requirements; Selection module: select the type and parameters of the preheating device based on the roasting preheating requirements, and install the preheating device; Index module: Combine the characteristics of coal gangue and the purpose of the preheating device to formulate the roasting index of coal gangue; Heat load module: Start the preheating device and determine whether the heat load meets the preset standard according to the roasting index; Adjustment module: adjust the control parameters of the preheating device according to the judgment result of the heat load of the preheating device.

2. A preheating device for coal gangue roasting according to claim 1, characterized in that: The demand module includes: Chemical analysis unit: Use sample gangue as test material and obtain the chemical characteristics of gangue through chemical analysis method; Physical unit: obtain the first physical properties of coal gangue by physical analysis method, and obtain the physical properties of coal gangue by combining the national standard parameters of coal gangue; The chemical properties and the physical properties of coal gangue constitute the properties of coal gangue.

3. A preheating device for coal gangue roasting according to claim 2, characterized in that: The demand module further includes: Roasting preheating requirement unit: Based on the physical properties of coal gangue, the particle size and thickness of coal gangue are determined. Combined with the chemical properties of coal gangue, the preheating heat requirement of coal gangue is obtained as follows: ;in, represents the preheating heat requirement of coal gangue, represents the preheating mass flow rate, represents the specific heat capacity of coal gangue, Indicates the preset preheating temperature change, represents the activation energy of coal gangue, It represents the preheating gas constant of coal gangue, which is related to the particle size and thickness of coal gangue; The preheating heat requirement of coal gangue is the basic roasting preheating heat requirement of the preheating device.

4. A preheating device for coal gangue roasting according to claim 1, characterized in that: The selection module includes: Type selection unit: According to the roasting preheating requirements and system design, the preheating cylinder is selected as the preheating device, wherein the preheating cylinder heats the gangue evenly through the heating element, and then monitors the temperature in the preheating cylinder to heat the gangue to complete the preheating; Installation configuration unit: install the preheating device according to the preset standard installation parameters, and test the preheating device to check whether the performance parameters of the preheating device meet the standard requirements.

5. A preheating device for gangue roasting according to claim 1, characterized in that: The indicator module includes: Index unit: Generate the preheating process of roasting according to the characteristics of coal gangue and the preheating requirements of roasting, and determine the standard preheating value for all roasting parameters in combination with the purpose of the preheating device; The roasting parameters and their standard preheating values ​​generate the roasting index of coal gangue.

6. A preheating device for coal gangue roasting according to claim 5, characterized in that: The heat load module comprises: Start-up unit: according to the preheating process of roasting, start the preheating device and obtain the original data of roasting parameters based on the sensor equipment of the preheating device; Standardization unit: clean the original data of roasting parameters, and then standardize them according to national standard units to obtain standard data of roasting parameters; Heat load unit: According to the standard data of roasting parameters, the roasting heat load at any preheating moment is obtained as follows: ;in, represents the heat load at time t, represents the mass flow rate of coal gangue, represents the specific heat capacity of coal gangue, represents the temperature change at time t, Indicates the initial moisture content of coal gangue, represents the latent heat of evaporation at time t, represents the initial volatile matter content of coal gangue, represents the mass flow rate of phase change material of coal gangue at time t, Indicates the preset heat of phase change of coal gangue; If the absolute value deviation between the heat load at any moment and the heat load standard value of the preheating device is greater than the standard threshold, it is determined that the heat load does not meet the standard. Otherwise, preheating continues.

7. A preheating device for coal gangue roasting according to claim 6, characterized in that: The adjustment module comprises: Control model unit: Based on the standard preheating values ​​of all roasting parameters and the preheating heat requirement of coal gangue as constraints, the control model is input based on preset control parameters; Adjustment unit: if the heat load is less than the heat load standard value, it means that the heating is insufficient, and if the heat load is greater than the heat load standard value, it means that the heat output is excessive; the difference between the heat load and the heat load standard value of the preheating device is input into the control model, and the first control result is output; According to the fitting deviation between the constraint condition and the first control result, the preset control parameter is adjusted, and it is iterated until the fitting deviation between the constraint condition and the control result approaches 0; The control parameters are optimal control parameters. The temperature control parameters and airflow control parameters of the preheating device are obtained based on the optimal control parameters, and the equipment of the preheating device is adjusted.

8. A preheating system for coal gangue roasting, characterized in that: The preheating process of the preheating device for coal gangue roasting according to any one of claims 1 to 7 comprises: Step 1: Obtain the characteristics of coal gangue and determine the roasting preheating requirements; Step 2: Select the type and parameters of the preheating device based on the roasting preheating requirements, and install the preheating device; Step 3: Combine the characteristics of coal gangue and the purpose of the preheating device to formulate the roasting index of coal gangue; Step 4: Start the preheating device and determine whether the heat load meets the preset standard according to the roasting index; Step 5: According to the judgment result of the heat load of the preheating device, adjust the control parameters of the preheating device.

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