Direct blowing type coal pulverizing system and thermal power plant

Abstract

The invention relates to the technical field of coal pulverizing, in particular to a direct blowing type coal pulverizing system and a thermal power plant. The airflow control unit is used for automatically adjusting airflow according to the real-time working state of the coal mill so as to reduce energy loss; the heat energy recovery device is used for collecting heat energy generated by the coal mill and preheating fed materials or assisting in power generation so as to improve the energy utilization rate; the dust treatment device is used for collecting dust generated in the powder making process and treating or recycling the dust so as to reduce dust emission; the automatic control platform is used for monitoring and managing the whole coal pulverizing system, and the system can improve the combustion efficiency of coal by optimizing the coal pulverizing process and accurately controlling the operation parameters of the coal pulverizer, so that the fuel consumption is reduced, and the coal pulverizing efficiency is improved. The heat energy recovery device can recover heat energy generated in the coal grinding process and is used for preheating feeding or assisting power generation, and the energy utilization rate is further increased.

Description

Technical Field

[0001] The present invention relates to the technical field of coal pulverizing technology, in particular to a direct-blowing type pulverizing system and a thermal power plant. Background Art

[0002] In thermal power generation, coal is the primary fuel, and its pulverization process plays a crucial role in overall power generation efficiency and environmental impact. Traditional coal pulverization systems suffer from numerous shortcomings, such as high energy consumption, low efficiency, and high dust emissions. These issues not only increase power generation costs but also cause significant environmental pollution. With increasing global demand for energy conservation, emission reduction, and environmental protection, the development of an efficient, energy-saving, and environmentally friendly pulverization system has become increasingly important.

[0003] Existing pulverizing systems often fail to fully pulverize coal during the pulverization process due to aging equipment and outdated technology, impacting combustion efficiency and, consequently, the energy efficiency of the entire power generation process. Furthermore, the large amount of dust generated during pulverization, if not effectively treated, is directly released into the atmosphere, severely impacting air quality. Therefore, how to improve pulverization efficiency, reduce energy consumption, and effectively treat dust through technological innovation has become a pressing technical challenge for the thermal power generation industry.

[0004] While some improvements have been implemented to address these issues, such as adopting new coal mills and optimizing airflow control, these measures often exist independently and lack systematic integration and optimization. Therefore, developing a comprehensive, energy-saving, direct-blowing pulverizing system that integrates coal grinding, airflow control, heat recovery, dust treatment, and automated monitoring is of great practical significance for improving the energy efficiency of thermal power plants and reducing environmental pollution. It is against this backdrop that the present invention proposes a direct-blowing pulverizing system, aiming to achieve energy efficiency improvements and environmental friendliness during thermal power generation. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is: how to improve energy utilization and environmental protection.

[0006] The above technical problems are solved by the following technical solutions: The present invention proposes a direct-blowing pulverizing system, comprising:

[0007] Coal mill, which is used to grind coal into coal powder;

[0008] An airflow control unit, which is used to automatically adjust the airflow according to the real-time working status of the coal mill to reduce energy loss;

[0009] Heat recovery device, which is used to collect heat energy generated by the coal mill and use it to preheat feed or assist in power generation to improve energy utilization;

[0010] Dust treatment device, which is used to collect dust generated during the powder making process and treat or recycle it to reduce dust emissions;

[0011] Automation control platform, which is used to monitor and manage the entire milling system;

[0012] The coal powder ground by the coal mill is transported via airflow. The heat generated by the coal mill during operation is recovered by a heat recovery device and then fed back to the airflow control unit to dry the coal powder.

[0013] In a preferred embodiment of the direct-blowing pulverizing system of the present invention: a pre-treatment unit is provided in the coal mill, and the pre-treatment unit is used to perform preliminary crushing and drying of the coal to improve the coal grinding efficiency;

[0014] The coal mill is equipped with a pressure regulating unit, which automatically adjusts the pressure of the grinding rollers of the coal mill according to the hardness and humidity of the coal to optimize the coal grinding process;

[0015] The coal mill is provided with a cooling unit, which is used to reduce the temperature of the coal mill during operation to extend the service life of the equipment;

[0016] The heat recovered by the heat energy recovery device comes from the heat absorbed by the cooling unit.

[0017] In a preferred embodiment of the direct-blowing pulverizing system of the present invention: the heat energy recovery device includes:

[0018] a thermal energy storage unit for storing thermal energy;

[0019] The heat exchanger is used to realize the heat exchange of the coal mill.

[0020] In a preferred embodiment of the direct-blowing pulverizing system of the present invention: a heat exchange temperature sensor is provided in the heat exchanger, and the heat exchange temperature sensor can monitor the temperature change of the heat exchanger in real time;

[0021] The heat exchanger is provided with a heating element for controlling the heating of the heat exchanger;

[0022] A cooling element is provided in the heat exchanger for controlling the cooling of the heat exchanger;

[0023] The heat exchanger is provided with a controller which receives data from a heat exchange temperature sensor and automatically adjusts the heating element or cooling element of the heat exchanger according to a preset control algorithm to maintain an optimal heat exchange temperature.

[0024] In a preferred embodiment of the direct-blowing pulverizing system of the present invention: the airflow control unit is connected to an airflow velocity sensor and an airflow temperature sensor;

[0025] The air flow velocity sensor is used to monitor the air flow velocity;

[0026] The air flow temperature sensor is used to monitor the temperature inside the coal mill;

[0027] The airflow control unit receives signals from the airflow velocity sensor and the airflow temperature sensor and automatically adjusts the operating parameters of the fan according to a preset algorithm.

[0028] In a preferred embodiment of the direct-blowing pulverizing system of the present invention: the dust handling device includes:

[0029] A dust collection unit, which is used to collect dust generated by the coal mill;

[0030] A dust conveying unit, which is used to convey the collected dust;

[0031] A dust purification unit, which is used to purify the collected dust to reduce the impact on the environment;

[0032] The dust utilization unit is used to convert the purified dust into reusable resources.

[0033] In a preferred embodiment of the direct-blowing pulverizing system of the present invention: a dust pressure sensor is provided in the dust conveying unit, and the dust pressure sensor is used to detect the pressure in the dust conveying unit;

[0034] A dust concentration sensor is provided in the dust conveying unit, and the dust concentration sensor is used to detect the dust concentration in the dust conveying unit;

[0035] A dust flow sensor is provided in the dust conveying unit, and the dust flow sensor is used to detect the fluid flow in the dust conveying unit.

[0036] In a preferred embodiment of the direct-blowing pulverizing system of the present invention: the automation control platform includes:

[0037] A central processing unit, which is used to process data;

[0038] Input and output interfaces, which are used to realize data interaction and data transmission communication;

[0039] A user interface that displays system status and allows operators to exercise manual control;

[0040] Remote monitoring module, which is used to implement remote monitoring and fault diagnosis.

[0041] In a preferred embodiment of the direct-blowing pulverizing system of the present invention, the airflow control unit is connected to a humidity sensor, and the humidity sensor is used to monitor the humidity inside the coal mill to further optimize the airflow control.

[0042] The present invention also provides a thermal power plant, comprising the direct-blowing pulverizing system.

[0043] The beneficial effects of the present invention are as follows: by optimizing the coal grinding process and precisely controlling the operating parameters of the coal mill, the system can improve the combustion efficiency of coal, thereby reducing fuel consumption; the heat recovery device can recover the heat energy generated during the coal grinding process and use it for preheating feed or auxiliary power generation, further improving energy utilization; the dust treatment device significantly reduces the impact of dust emissions on the environment and reduces dust emissions by collecting and purifying the dust generated during the coal grinding process; the purified dust is converted into a reusable resource, such as an auxiliary fuel or other industrial raw material, thereby realizing the recycling of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. Obviously, the drawings described below only relate to some embodiments of the present invention, and are not intended to limit the present invention.

[0045] Figure 1 Shown is a schematic diagram of the overall structure of the direct-blowing pulverizing system. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0047] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0048] Reference Figure 1 This embodiment provides a direct-blowing pulverizing system, comprising:

[0049] Coal mill, which is used to grind coal into coal powder;

[0050] An airflow control unit, which is used to automatically adjust the airflow according to the real-time working status of the coal mill to reduce energy loss;

[0051] Heat recovery device, which is used to collect heat energy generated by the coal mill and use it to preheat feed or assist in power generation to improve energy utilization;

[0052] Dust treatment device, which is used to collect dust generated during the powder making process and treat or recycle it to reduce dust emissions;

[0053] Automation control platform, which is used to monitor and manage the entire milling system;

[0054] The coal powder ground by the pulverizer is transported through the air flow. The heat generated by the pulverizer during operation is recovered by the heat recovery device and fed back to the air flow control unit to dry the coal powder.

[0055] Coal is ground into coal powder through a coal mill. The operating parameters of the fan are controlled by the airflow control unit, thereby changing the state of the airflow in the coal mill. The heat recovery device recovers and utilizes the heat generated by the coal mill during operation to improve energy utilization. The dust generated during the pulverizing process is recovered through a dust treatment device to reduce pollution to the environment. The entire process can be automatically controlled and monitored through an automated control platform, or the automated control platform can be manually adjusted by the operator.

[0056] Preferably, the grinding rollers and grinding discs of the coal mill are made of wear-resistant and corrosion-resistant alloy materials, such as stainless steel containing a high proportion of chromium, nickel and molybdenum, or tungsten carbide coating to improve their wear resistance and corrosion resistance. The selection of this material is based on its ability to resist wear and chemical corrosion during long-term operation, thereby significantly extending the service life of the coal mill. Specifically, the surface hardness of the grinding rollers and grinding discs can reach HRC55 or above, ensuring that the shape and size stability are maintained under high load and high-speed rotation conditions. In addition, the design of these components also adopts heat treatment processes such as quenching and tempering to further improve their mechanical properties and durability. Maintenance costs and downtime are significantly reduced, and the reliability and economic benefits of the entire system are improved.

[0057] As an optional embodiment: a pre-treatment unit is provided in the coal mill, which is used to perform preliminary crushing and drying of the coal. This step is to improve the efficiency of subsequent grinding, thereby improving the coal grinding efficiency;

[0058] The coal mill is equipped with a pressure regulating unit, which automatically adjusts the pressure of the grinding rollers according to the hardness and moisture of the coal to optimize the coal grinding process;

[0059] The coal mill is equipped with a cooling unit, which is used to reduce the temperature of the coal mill during operation to extend the service life of the equipment;

[0060] The heat recovered by the heat recovery device comes from the heat absorbed by the cooling unit.

[0061] The coal processed by the pretreatment unit will be sent into the coal mill for grinding. The pressure regulating unit will automatically adjust the pressure of the grinding roller according to the real-time monitored coal hardness and humidity data to ensure the optimization of the coal grinding process.

[0062] During the coal grinding process, the built-in cooling unit works to extend the service life of the equipment by reducing the temperature of the coal grinding mill.

[0063] As an optional embodiment: the heat energy recovery device includes:

[0064] a thermal energy storage unit for storing thermal energy;

[0065] The heat exchanger is used to realize the heat exchange of the coal mill.

[0066] In terms of heat recovery, the heat energy generated by the coal mill is collected by the heat exchanger and converted into usable heat energy, part of which will be stored in the thermal energy storage unit for emergency use or used to preheat the feed and assist in power generation.

[0067] As an optional embodiment: a heat exchange temperature sensor is provided in the heat exchanger, and the heat exchange temperature sensor can monitor the temperature change of the heat exchanger in real time;

[0068] A heating element is provided in the heat exchanger, which is used to control the heating of the heat exchanger;

[0069] A cooling element is provided in the heat exchanger, which is used to control the cooling of the heat exchanger;

[0070] A controller is provided inside the heat exchanger, which receives data from the heat exchange temperature sensor and automatically adjusts the heating element or cooling element of the heat exchanger according to a preset control algorithm to maintain the optimal heat exchange temperature.

[0071] The heat exchanger temperature sensor has a measurement range of 50°C to 300°C with an accuracy of ±0.5°C, enabling real-time monitoring of heat exchanger temperature changes. The controller receives data from the heat exchanger temperature sensor and, based on a pre-set control algorithm, automatically adjusts the heat exchanger's heating or cooling elements to maintain the optimal heat exchange temperature. For example, if the heat exchanger temperature is detected to be below the set point, the controller activates the heating element to raise the temperature to the optimal heat conversion temperature, typically between 180°C and 220°C, to maximize heat conversion efficiency. The controller can further fine-tune the temperature setting based on actual heat conversion performance to adapt to varying operating conditions and environmental variations. This precise temperature control strategy not only improves heat conversion efficiency but also helps protect the heat exchanger from overheating or overcooling, thereby extending the equipment's service life. Through this intelligent temperature management, the heat recovery unit can more efficiently convert the heat generated during coal pulverization into usable heat, providing stable heat for preheating feed or auxiliary power generation, significantly improving the energy efficiency and economic efficiency of the entire pulverizing system.

[0072] As an optional embodiment: the airflow control unit is connected to an airflow velocity sensor and an airflow temperature sensor;

[0073] The air flow velocity sensor is used to monitor the air flow velocity;

[0074] The air flow temperature sensor is used to monitor the temperature inside the coal mill;

[0075] The airflow control unit receives signals from the airflow velocity sensor and the airflow temperature sensor and automatically adjusts the operating parameters of the fan according to a preset algorithm to optimize the airflow and reduce energy loss.

[0076] As an optional embodiment: the dust treatment device includes:

[0077] A dust collection unit, which is used to collect dust generated by the coal mill;

[0078] A dust conveying unit, which is used to convey the collected dust;

[0079] A dust purification unit, which is used to purify the collected dust to reduce the impact on the environment;

[0080] The dust utilization unit is used to convert the purified dust into reusable resources.

[0081] In terms of dust treatment, dust generated during the pulverizing process is captured by a dust collection unit and then purified by a dust purification unit to reduce environmental pollution. The purified dust is then converted into a reusable resource by a dust utilization unit, such as auxiliary fuel or other industrial uses, such as by compressing the dust into powder cakes for combustion.

[0082] The core of the dust conveying unit is a closed network of pipes with an inner diameter of 150 to 300 mm and a maximum pressure of 0.5 to 1.0 MPa. This ensures that dust does not leak into the environment during transportation and reduces energy losses during transportation. The dust conveying unit uses pneumatic conveying, using the airflow generated by the fan to transport the dust from the dust collection unit to the dust utilization unit. The fan's air volume and pressure can be adjusted according to the nature of the dust and the conveying distance to ensure stable and continuous dust transportation. For example, for lighter dust, the fan's air volume may need to be set at 500 to 1000 cubic meters per hour and the air pressure at 0.2 to 0.4 MPa; for heavier dust, the air volume may need to be increased to 1500 to 2000 cubic meters per hour and the air pressure may need to be increased to 0.6 to 0.8 MPa. During the dust conveying process, the system is equipped with multiple monitoring points, including dust concentration sensors, dust pressure sensors, and dust flow sensors, which monitor the dust concentration, pressure, and flow rate in the conveying pipeline in real time to ensure stable and safe dust transportation. If an abnormality is detected, such as dust blockage or pipeline leakage, the system automatically triggers an alarm and initiates emergency response plans, such as adjusting fan operating parameters or closing relevant valves to prevent dust leakage or equipment damage. This efficient dust conveying allows collected dust to be safely and quickly transported to a dust utilization unit for further processing and utilization, such as conversion into auxiliary fuel or other industrial raw materials. This not only reduces dust pollution to the environment but also enables resource recycling, improving the environmental performance and economic benefits of the entire pulverizing system. Furthermore, the system's automated monitoring and control functions reduce operator workload and enhance system safety and reliability.

[0083] As an optional embodiment: a dust pressure sensor is provided in the dust conveying unit, and the dust pressure sensor is used to detect the pressure in the dust conveying unit;

[0084] A dust concentration sensor is provided in the dust conveying unit, and the dust concentration sensor is used to detect the dust concentration in the dust conveying unit;

[0085] A dust flow sensor is provided in the dust conveying unit, and the dust flow sensor is used to detect the fluid flow in the dust conveying unit.

[0086] As an optional embodiment: the automation control platform includes:

[0087] The central processing unit is used to process data; it is responsible for processing data information from the coal mill, air flow control unit, heat recovery device, and dust treatment device.

[0088] Input and output interfaces are used to realize data interaction and data transmission communication; the automation control platform can communicate with the coal mill, air flow control unit, heat recovery device, and dust treatment device through the input and output interfaces to realize real-time data exchange and instruction transmission.

[0089] The user interface is used to display the system status and allow operators to perform manual control; operators can monitor the system status in real time through the user interface and make necessary adjustments through manual control to ensure efficient, stable and environmentally friendly operation of the entire milling system.

[0090] Remote monitoring module, which is used to implement remote monitoring and fault diagnosis.

[0091] When the system detects that the temperature of the coal mill exceeds the set threshold, the remote monitoring module will immediately issue an alarm and automatically start the cooling unit to prevent the equipment from overheating. The remote monitoring module also has a fault diagnosis function, which can identify potential failure modes and performance degradation trends by analyzing equipment operating data. For example, if the sensor readings of the airflow control unit are continuously lower than the normal range, the module will analyze the possible causes, such as fan failure or pipe blockage, and provide corresponding maintenance recommendations. Operators can view the system status in real time, receive alarm notifications, and perform remote operations based on the fault diagnosis results, such as adjusting equipment parameters or scheduling maintenance work, through remote terminals such as computers or mobile devices.

[0092] As an optional embodiment: the airflow control unit is connected to a humidity sensor, which is used to monitor the humidity inside the coal mill to further optimize the airflow control.

[0093] The pulverizer monitors humidity levels by integrating at least one high-precision humidity sensor. This sensor measures the relative humidity within the pulverizer in real time, ranging from 10% to 90% with an accuracy of up to ±2%, ensuring precise monitoring of humidity changes during the pulverization process. The controller uses this humidity data, combined with a pre-set algorithm and the pulverizer's real-time operating status, to automatically adjust fan operating parameters, such as air speed and air volume, to adapt to varying humidity conditions. For example, in high-humidity environments, the system might increase air volume to improve drying efficiency, while in low-humidity conditions, it might reduce air volume to conserve energy. Furthermore, the system predicts pulverizer maintenance needs based on humidity trends. For example, if humidity remains consistently high, it might trigger a preventive maintenance procedure to prevent corrosion or wear. This intelligent humidity monitoring and control strategy not only improves pulverization efficiency and energy utilization, but also helps extend the pulverizer's service life, ensuring stable operation and high energy efficiency of the entire pulverizing system.

[0094] As an optional embodiment: a thermal power plant includes a direct-blowing pulverizing system.

[0095] The system utilizes a modular design, allowing key components such as the coal mill, airflow control unit, heat recovery unit, dust handling unit, and automation control platform to be replaced or upgraded as independent modules. This design allows power plants to flexibly select and configure system components based on their specific operating conditions and performance requirements. If a power plant needs to process harder coal, it can choose a coal mill equipped with rollers and grinding discs made of wear-resistant materials. Alternatively, if a power plant seeks to improve heat recovery efficiency, it can upgrade to a heat recovery unit with higher heat exchange efficiency. Each module is designed with standardized interfaces, ensuring compatibility with other systems and easy integration. When maintenance or upgrades are required, operators can easily remove and replace any module without making major changes to the entire system. For example, if the performance of the dust collection unit deteriorates, that module can be replaced independently without affecting the operation of other components. This modular design also means that as technology advances, power plants can gradually introduce new technologies, such as more efficient sensors or more advanced automation and control systems, to improve the performance and reliability of the entire pulverizing system. The modular design also simplifies inventory management and spare parts supply, as power plants only need to stock spare parts for key modules, rather than entire system components. This reduces inventory costs and ensures rapid repair and replacement when needed. Through this modular and scalable design, the direct-fired pulverizing system of the present invention can adapt to the diverse needs of different power plants, providing a flexible, efficient, and cost-effective solution.

[0096] The method of using the direct-blowing pulverizing system includes the following steps:

[0097] S1. Start the pre-treatment unit: Start the pre-treatment unit of the coal mill to perform preliminary crushing and drying of the coal. The crushing force can be adjusted to a maximum of 1000 Newtons, and the drying temperature can be adjusted to a maximum of 150°C.

[0098] S2. Automatically adjust the grinding roller pressure: According to the hardness and humidity of the coal, the pressure regulating unit adjusts the grinding roller pressure to ensure that the coal mill operates in the best condition.

[0099] S3. Cooling unit operation: The built-in cooling unit reduces the temperature of the coal mill to no more than 70°C during operation to extend the service life of the equipment.

[0100] S4. Monitoring air flow velocity: The air flow velocity sensor in the air flow control unit is used to monitor the air flow velocity of the coal mill. The sensor has a measurement range of 0 to 30 m / s.

[0101] S5. Monitoring the temperature of the coal mill: Use an air flow temperature sensor to monitor the temperature inside the coal mill. The sensor measurement range is 20 to 200°C.

[0102] S6. Automatically adjust fan operating parameters: Based on the sensor monitoring results, the controller automatically adjusts the fan operating parameters, such as wind speed and air volume, to optimize airflow and reduce energy loss.

[0103] S7. Collecting heat energy: The heat energy generated by the coal mill is collected through the heat exchanger in the heat recovery device.

[0104] S8. Storing thermal energy: The collected thermal energy is stored in a thermal energy storage unit with the storage temperature controlled at 100 to 200°C for subsequent use.

[0105] S9. Collect dust: Collect dust generated by the coal mill through the dust collection unit.

[0106] S10. Dust purification: Use the dust purification unit to purify the collected dust.

[0107] S11. Dust recycling: The purified dust is converted into reusable resources through the dust utilization unit.

[0108] S12. Data processing: The data from each sensor is processed by the central processor of the integrated automation control platform.

[0109] S13. System communication: communicate with the coal mill, air flow control unit, heat recovery device and dust treatment device through input and output interfaces.

[0110] S14. Remote Monitoring and Fault Diagnosis: The remote monitoring module enables remote monitoring of system status and fault diagnosis via high-speed Ethernet or wireless 4G / 5G networks. Operators can view system status in real time on a remote terminal (such as a computer or mobile device), receive alarm notifications, and perform remote operations based on fault diagnosis results, such as adjusting equipment parameters or scheduling maintenance work, to ensure stable system operation.

[0111] In summary, by optimizing the coal pulverization process and precisely controlling mill operating parameters, this system improves coal combustion efficiency, thereby reducing fuel consumption. A heat recovery unit recycles the heat generated during pulverization and uses it for feed preheating or auxiliary power generation, further improving energy efficiency. The dust treatment unit collects and purifies dust generated during pulverization, significantly reducing the environmental impact and emissions. The purified dust is converted into a reusable resource, such as auxiliary fuel or other industrial raw materials, achieving resource recycling. The integrated automated control platform and remote monitoring module enable intelligent and automated monitoring and management of the entire pulverizing system. The central processing unit processes data from various sensors in real time and provides system status information to operators through a user interface, enabling them to respond to and address various operating conditions promptly. The remote monitoring module allows operators to view system status in real time on a remote terminal, perform fault diagnosis, and perform maintenance work, reducing the need and cost of on-site maintenance. This intelligent monitoring and management approach improves system reliability, reduces unplanned downtime, and reduces operating costs, thereby enhancing the economic efficiency of the power plant.

[0112] Finally, it should be pointed out that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. A direct-blowing pulverizing system, characterized by: include, Coal mill, which is used to grind coal into coal powder; An airflow control unit, which is used to automatically adjust the airflow according to the real-time working status of the coal mill; a heat recovery device for collecting heat energy generated by the coal mill; A dust treatment device, which is used to collect dust generated during the powder making process; Automation control platform, which is used to monitor and manage the entire milling system; The coal powder ground by the coal mill is transported via airflow. The heat generated by the coal mill during operation is recovered by a heat recovery device and then fed back to the airflow control unit to dry the coal powder.

2. The direct-blowing pulverizing system according to claim 1, characterized in that: The coal mill is provided with a pre-processing unit, which is used to perform preliminary crushing and drying of the coal; The coal mill is provided with a pressure regulating unit, which automatically adjusts the pressure of the grinding roller of the coal mill according to the hardness and humidity of the coal; A cooling unit is provided in the coal mill, and the cooling unit is used to reduce the temperature of the coal mill during operation; The heat recovered by the heat energy recovery device comes from the heat absorbed by the cooling unit.

3. The direct-blowing pulverizing system according to claim 2, characterized in that: The heat energy recovery device comprises: a thermal energy storage unit for storing thermal energy; The heat exchanger is used to realize the heat exchange of the coal mill.

4. The direct-blowing pulverizing system according to claim 3, characterized in that: A heat exchange temperature sensor is provided in the heat exchanger, and the heat exchange temperature sensor can monitor the temperature change of the heat exchanger in real time; The heat exchanger is provided with a heating element for controlling the heating of the heat exchanger; A cooling element is provided in the heat exchanger for controlling the cooling of the heat exchanger; The heat exchanger is provided with a controller which receives data from a heat exchange temperature sensor and automatically adjusts the heating element or cooling element of the heat exchanger according to a preset control algorithm to maintain an optimal heat exchange temperature.

5. The direct-blowing pulverizing system according to claim 4, characterized in that: The airflow control unit is connected to an airflow velocity sensor and an airflow temperature sensor; The air flow velocity sensor is used to monitor the air flow velocity; The air flow temperature sensor is used to monitor the temperature inside the coal mill; The airflow control unit receives signals from the airflow velocity sensor and the airflow temperature sensor and automatically adjusts the operating parameters of the fan according to a preset algorithm.

6. The direct-blowing pulverizing system according to claim 5, characterized in that: The dust treatment device comprises: A dust collection unit, which is used to collect dust generated by the coal mill; A dust conveying unit, which is used to convey the collected dust; A dust purification unit, which is used to purify the collected dust; The dust utilization unit is used to convert the purified dust into reusable resources.

7. The direct-blowing pulverizing system according to claim 6, characterized in that: A dust pressure sensor is provided in the dust conveying unit, and the dust pressure sensor is used to detect the pressure in the dust conveying unit; A dust concentration sensor is provided in the dust conveying unit, and the dust concentration sensor is used to detect the dust concentration in the dust conveying unit; A dust flow sensor is provided in the dust conveying unit, and the dust flow sensor is used to detect the fluid flow in the dust conveying unit.

8. The direct-blowing pulverizing system according to claim 7, characterized in that: The automation control platform includes: A central processing unit, which is used to process data; Input and output interfaces, which are used to realize data interaction and data transmission communication; A user interface that displays system status and allows operators to exercise manual control; Remote monitoring module, which is used to implement remote monitoring and fault diagnosis.

9. The direct-blowing pulverizing system according to claim 8, characterized in that: The airflow control unit is connected to a humidity sensor, and the humidity sensor is used to monitor the humidity inside the coal mill.

10. A thermal power plant, characterized in that: It comprises the direct-blowing pulverizing system described in any one of claims 1 to 9.

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