A power plant raw coal process system and production method

Abstract

The present application relates to a kind of power plant raw coal process system and production method, belong to power plant raw coal production technical field;Including receiving coal subsystem, homogenization subsystem, secondary mixing uniform storage subsystem and production scheduling control subsystem, receiving coal subsystem includes train coal handling unit, automobile coal handling unit, coal mine direct coal handling unit and coal returning system, homogenization subsystem includes storage yard, material stacking facility, material taking facility, secondary mixing uniform storage subsystem includes silo group, coal bunker system before furnace;Coal on train coal handling unit, automobile coal handling unit, coal mine direct coal handling unit is transported to homogenization subsystem by coal returning system, the coal of homogenization subsystem is exported to silo group by first coal conveying system, the coal of silo group is exported to coal bunker system before furnace by second coal conveying system, and coal quality on-line detection device is provided on second coal conveying system;Solve the problem that current power plant raw coal system cannot reasonably mix various raw materials.

Description

Technical Field

[0001] This invention belongs to the field of power plant raw coal production technology, specifically relating to a power plant raw coal process system and production method. Background Technology

[0002] my country's energy resource endowment characteristics determine that coal is a basic energy source and an important raw material. The development of the coal industry must follow a clean and efficient utilization path. Therefore, in some coal-rich areas, economic circular parks integrating coal, power, and building materials are often built to extend the coal industry chain and achieve graded and gradient utilization of coal. Supporting thermal power plants, as an important link in the industry chain, primarily aim to use low-quality raw coal, middlings coal, coal slime, and gangue generated during the coal production and processing of surrounding mines as fuel for power generation, thereby increasing the utilization value of coal, reducing land occupation and environmental pollution from coal stockpiling. The stability of fuel coal quality is crucial for the normal power generation of thermal power plants, effectively improving boiler operating efficiency, ensuring power supply quality, and reducing operating costs. However, in actual operation, due to the characteristics of numerous coal mines, large coal quantities, diverse coal types, and significant differences in coal quality within circular parks, as well as unreasonable design of the raw coal system for supporting power plants, it is not always possible to effectively utilize various low-quality raw coal and middlings coal... The ineffective and rational blending of coal slime, gangue, and other materials results in coal quality that fails to meet the requirements of power plant boilers, leading to unstable operation. This necessitates the direct use of raw coal as fuel, resulting in high operating costs for power plants and hindering the efficient and clean utilization of coal. Therefore, this invention proposes a raw coal processing system and production method for power plants to address these problems. Summary of the Invention

[0003] This invention overcomes the shortcomings of existing technologies and proposes a process system and production method for raw coal in power plants; it solves the problem that the current raw coal system in coal-fired power and building materials economic circular park power plants cannot reasonably mix various raw materials.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution.

[0005] A power plant raw coal processing system and production method includes a coal receiving subsystem, a homogenization subsystem, a secondary mixing and storage subsystem, and a production scheduling and control subsystem. The coal receiving subsystem includes a coal handling unit for coal arriving by train, a coal handling unit for coal arriving by truck, a coal mine direct coal handling unit, and a return coal system. The homogenization subsystem includes a storage yard, stockpiling facilities, and reclaiming facilities. The secondary mixing and storage subsystem includes a first coal conveying system, a group of silos, a second coal conveying system, an online coal quality monitoring device, and a coal bunker system in front of the furnace. Coal from the coal handling units for coal arriving by train, truck, and coal mine is transported to the homogenization subsystem via the return coal system. Coal from the homogenization subsystem is output to the silo group via the first coal conveying system, and coal from the silo group is output to the coal bunker system in front of the furnace via the second coal conveying system.

[0006] Furthermore, the train coal handling unit includes an automatic train vehicle information acquisition device, a train coal sampling and preparation device, a train coal quality rapid testing device, a train unloading ditch, an impeller feeder, and a train coal belt conveyor; the train unloading ditch is arranged in a double row with internal partition walls to accommodate simultaneous unloading and separate storage and transportation of two trains carrying different types of coal; a fully enclosed coal shed is installed on top of the train coal handling unit, equipped with spray dust suppression facilities.

[0007] Furthermore, the truck coal handling unit includes a vehicle information acquisition device, a truck coal sampling and preparation device, a truck coal rapid quality detection device, a through-type unloading ditch, a vibrating coal feeder, and a truck coal belt conveyor. A fully enclosed coal shed is set on the top of the truck coal handling unit, and a spray dust suppression system is installed inside.

[0008] Furthermore, the storage yard is rectangular in shape and is arranged in a semi-underground manner. The upper part is a fully enclosed coal shed, and the top of the coal shed is equipped with an intelligent lighting, ventilation and dehumidification system. The bottom of the storage yard is laid with different particle sizes of slag and coal slurry water seepage purification and collection system. The fully enclosed coal shed is equipped with a gas detection and monitoring and ventilation safety system.

[0009] Furthermore, the stockpiling and reclaiming facilities are located on opposite sides of the long length of the fully enclosed storage yard, operating independently and without interference. The reclaiming facilities span the entire stockpile for reclaiming operations. The material is divided into two piles within the storage yard by the stockpiling facilities.

[0010] Furthermore, the silo complex includes four silos, a top unloading facility, a bottom coal feeder, a coal conveying belt conveyor, a silo level monitoring device, and a silo anti-arching and anti-blocking device. The storage capacity of the four silos meets the power plant's fuel buffering requirements. The first coal conveying system outputs coal to the top unloading facility, which is located above each silo. Each silo is equipped with a silo level monitoring device and a silo anti-arching and anti-blocking device. A bottom coal feeder is installed at the outlet of each silo. All coal from the bottom coal feeders is output to the coal conveying belt conveyor. The coal from the coal conveying belt conveyor is output to the second coal conveying system, which is equipped with an online coal quality detection device.

[0011] Furthermore, the furnace front coal bunker system includes a furnace front coal bunker, a top unloading facility and a bottom coal feeder, a coal bunker level monitoring device, and a coal bunker anti-arching and anti-blocking device. The top unloading facility is located above the furnace front coal bunker. Coal from the second coal conveying system is output to the top unloading facility, and the coal from the top unloading facility is transported to the inside of the furnace front coal bunker. The furnace front coal bunker is equipped with a coal bunker level monitoring device and a coal bunker anti-arching and anti-blocking device. A bottom coal feeder is installed at the lower outlet of the furnace front coal bunker.

[0012] Furthermore, the production scheduling and control subsystem consists of a unified coal dispatching and management module for coal arriving from various coal mines in the park, a coal management module for power plants, an automatic vehicle information acquisition module, an online coal quality sampling and testing module, a comprehensive material yard management module, a gas detection and monitoring and safety ventilation module, and an automatic equipment operation control module.

[0013] A production method for a power plant raw coal process system includes the following steps:

[0014] S1: Based on the coal consumption and quality requirements of the power plant's coal management module, the coal delivery scheduling and management module of each coal mine in the park promptly feeds back the demand information to the relevant coal mines, and each mine transports the raw coal that meets the requirements to the power plant.

[0015] S2: When the train arrives with coal, the train vehicle information is automatically identified by the automatic train vehicle information acquisition device, and the coal quality is sampled and tested by the train coal sampling device and the train coal quality rapid detection device. The coal is then transported to the top of the unloading ditch for unloading. The coal is then transported to the return coal system by the impeller feeder located at the bottom of the unloading ditch and the train coal belt conveyor.

[0016] S3: When the truck arrives with coal, it is first automatically identified by the automatic vehicle information acquisition device, and the coal quality is sampled and tested by the truck coal sampling device and the truck coal rapid quality detection device. Then, the coal is transported to the through unloading ditch for unloading, and then transported to the return coal system by the vibrating coal feeder at the bottom of the unloading ditch and the truck coal belt conveyor.

[0017] S4: The coal mine direct coal processing unit directly transports coal from each coal mine to the return coal system;

[0018] S5: The coal processing units for trains, trucks, and direct coal from the coal mine, according to the pre-set raw coal homogenization scheme, transport coal to the stockpiling facilities located in the storage yard through the coal return system at certain time intervals, or the direct coal from the coal mine directly transports various raw coals produced by the coal mine to the first coal transportation system; vehicle information and coal quality are uploaded to the production scheduling and control subsystem in real time;

[0019] S6: During stockpiling, the stockpiling facility reciprocates on top of stockpile B, stacking raw coal of different qualities in layers according to proportion. During material removal, the material removal facility removes material from one end of stockpile A in a "full-section cutting" manner from top to bottom, ensuring that the proportion of raw coal of different qualities remains unchanged, so as to achieve homogeneous and stable raw coal. After all the raw coal in stockpile A is removed, the stockpiling facility starts stockpiling again at the location of stockpile A, while the material removal facility starts removing material from stockpile B. In this way, stockpiles A and B are used alternately in a cycle.

[0020] S7: The raw coal taken out by the material handling facility is transported to the silo group for buffer storage through the first coal conveying system. According to the coal quality in each silo, it is mixed again by the coal feeder at the bottom of the silo. Finally, it is transported to the coal bunker in front of the furnace by the silo belt conveyor and the second coal conveying system for boiler combustion. The coal quality online detection device in the coal bunker detects the coal quality in real time.

[0021] S8: The coal quality online sampling and testing module of the production scheduling and control subsystem tests the coal quality of incoming coal, coal quality during homogenization, and coal quality of the final product to ensure that the coal quality meets the power plant's requirements. The material yard comprehensive management module controls the operation of the intelligent lighting, ventilation and dehumidification system and the coal slurry water infiltration purification and collection system according to the moisture content of the coal. It also controls the stacking facilities and material handling in real time according to the pre-set raw coal homogenization plan to achieve layered storage of raw coal and full-section material handling. The gas detection and monitoring and safety ventilation module monitors the material yard to ensure safe operation. The equipment automatic operation control module remotely controls various equipment according to the set operating program.

[0022] Furthermore, in step S6, the raw coal is piled into two piles, A and B, in the storage yard. Each pile is long and narrow. Pile A is a "product" that has been layered and piled according to the proportion of different coal qualities and has been dried to meet the power plant's requirements. Pile B is a pile of coal of different types that has been layered and stored and dried according to the pre-set homogenization ratio.

[0023] The beneficial effects of this invention compared to the prior art are as follows:

[0024] The power plant raw coal process system and production method provided by this invention can achieve efficient processing of coal from different coal mines and homogenization of fuel coal of different qualities. The blended coal has stable quality, meeting the power plant's requirements for coal quality. Moreover, the entire production process is highly automated and intelligent, safe, environmentally friendly and efficient, significantly reducing production costs, realizing comprehensive utilization of coal resources, and having significant economic, environmental and social benefits. Attached Figure Description

[0025] The present invention will now be described in further detail with reference to the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle;

[0028] Figure 3 yes Figure 1 A magnified view of a portion of point B in the middle;

[0029] Figure 4 yes Figure 1 A magnified view of a portion of point C in the middle;

[0030] Among them, 1 is the coal receiving subsystem, 11 is the train coal processing unit, 111 is the train vehicle information automatic acquisition device, 112 is the train coal sampling and preparation device, 113 is the train coal quality rapid testing device, 114 is the train unloading ditch, 115 is the impeller feeder, 116 is the train coal belt conveyor, 12 is the truck coal processing unit, 121 is the truck vehicle information acquisition device, 122 is the truck coal sampling and preparation device, 123 is the truck coal quality rapid testing device, 124 is the through unloading ditch, 125 is the vibrating feeder, 126 is the truck coal belt conveyor, 13 is the direct coal processing unit from the coal mine, and 14 is the return coal system. 2 is the homogenization subsystem, 21 is the storage yard, 22 is the stockpiling facility, 23 is the material retrieving facility, 3 is the secondary mixing and storage subsystem, 31 is the first coal conveying system, 32 is the silo group, 321 is the top unloading facility of the silo, 322 is the bottom coal feeder of the silo, 323 is the coal conveying belt conveyor, 324 is the silo material level monitoring and control device, 325 is the silo anti-arching and anti-blocking device, 33 is the second coal conveying system, 34 is the online coal quality detection device, 35 is the coal bunker in front of the furnace, 351 is the top unloading facility of the coal bunker, 352 is the bottom coal feeder of the coal bunker, 353 is the coal bunker material level monitoring and control device, 354 is the coal bunker anti-arching and anti-blocking device, and 4 is the production scheduling and control subsystem. Detailed Implementation

[0031] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of this invention are described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0032] like Figure 1 As shown in Figure 4, the present invention provides a power plant raw coal process system, including a coal receiving subsystem 1, a homogenization subsystem 2, a secondary mixing and storage subsystem 3, and a production scheduling and control subsystem 4.

[0033] The coal receiving subsystem 1 includes a coal processing unit 11 for coal arriving by train, a coal processing unit 12 for coal arriving by truck, a coal mine direct coal processing unit 13, and a coal return system 14.

[0034] The train coal handling unit 11 includes an automatic train vehicle information acquisition device 111, a train coal sampling and preparation device 112, a train coal rapid quality testing device 113, a train unloading ditch 114, an impeller feeder 115, and a train coal belt conveyor 116. The automatic train vehicle information acquisition device 111 is located in the direction of the loaded train coal arrival. The train coal sampling and preparation device 112 is located behind the automatic train vehicle information acquisition device 111. The train coal rapid quality testing device 113 is mounted on the train coal sampling and preparation device 112. The train unloading ditch 114 is located behind the train coal sampling and preparation device 112. The train unloading ditch 114 is arranged in two rows and has internal partition walls to accommodate simultaneous unloading and separate storage and transportation of two trains carrying different types of coal. Each row of train unloading trenches 114 is equipped with an impeller feeder 115 at its bottom, which transports the coal inside the unloading trenches 114 to the train's incoming coal conveyor belt 116. A fully enclosed coal shed with spray dust suppression facilities is installed at the top of each unloading trench 114.

[0035] The truck-mounted coal processing unit 12 includes a truck vehicle information acquisition device 121, a truck-mounted coal sampling and preparation device 122, a truck-mounted coal quality rapid testing device 123, a through-type unloading ditch 124, a vibrating feeder 125, and a truck-mounted coal belt conveyor 126. The truck vehicle information acquisition device 121 is located in the direction of the loaded truck receiving coal. The truck-mounted coal sampling and preparation device 122 is located behind the truck vehicle information acquisition device 121. The truck-mounted coal quality rapid testing device 123 is mounted on the truck-mounted coal sampling and preparation device 122. The through-type unloading ditch 124 is located behind the truck-mounted coal sampling and preparation device 122. A vibrating feeder 125 is installed at the bottom outlet of each through-type unloading ditch 124, and the outlet of each vibrating feeder 125 corresponds to a truck-mounted coal belt conveyor 126. A fully enclosed coal shed with spray dust suppression facilities is installed at the top of the through-type unloading ditch 124.

[0036] The coal mine direct coal processing unit 13, the train coal conveyor belt 116, and the truck coal conveyor belt 126 all output to the return coal system 14.

[0037] The homogenization subsystem 2 includes a storage yard 21, a stockpiling facility 22, and a reclaiming facility 23. The storage yard 21 is rectangular in shape and semi-underground, with a fully enclosed coal shed on top. The top of the coal shed is equipped with an intelligent lighting, ventilation, and dehumidification system. The bottom of the storage yard is layered with different particle sizes of slag and coal slurry, and a water infiltration purification and collection system. The fully enclosed coal shed is equipped with a gas detection and monitoring system and a ventilation and safety system. The stockpiling facility 22 and the reclaiming facility 23 are located on opposite sides of the long axis of the fully enclosed storage yard 21, operating independently without interference. The reclaiming facility 23 spans the entire stockpile for reclaiming operations. The material is divided into two piles within the storage yard 21 by the stockpiling facility 22.

[0038] The coal in the coal return system 14 is output to the homogenization subsystem 2.

[0039] The secondary mixing and storage subsystem 3 includes a first coal conveying system 31, a group of silos 32, a second coal conveying system 33, an online coal quality monitoring device 34, and a coal bunker system 35 in front of the furnace. Coal from the direct coal processing unit 13 and the homogenization subsystem 2 is output to the first coal conveying system 31. The silo group 32 includes four silos, a top unloading facility 321, a bottom coal feeder 322, a coal conveying belt conveyor 323, a silo level monitoring device 324, and a silo anti-arching and anti-blocking device 325. The storage capacity of the four silos meets the power plant's fuel buffering requirements. The first coal conveying system 31 outputs coal to the top unloading facility 321, which is located above each silo. Each silo is equipped with a silo level monitoring device 324, and each silo is equipped with an anti-arching and anti-blocking device 325. A bottom coal feeder 322 is installed at the bottom outlet of each silo. All coal on the bottom coal feeders 322 is output to the coal conveying belt conveyor 323. The coal on the coal conveying belt conveyor 323 is output to the second coal conveying system 33, which is equipped with an online coal quality detection device 34. The furnace front coal bunker system 35 includes a furnace front coal bunker, a top unloading facility 351, a bottom coal feeder 352, a coal bunker level monitoring device 353, and a coal bunker anti-arching and anti-blocking device 354. The top unloading facility 351 is located above the furnace front coal bunker. Coal from the second coal conveying system 33 is output to the top unloading facility 351, and the coal from the top unloading facility 351 is transported into the furnace front coal bunker. The furnace front coal bunker is equipped with a coal bunker level monitoring device 353, and an anti-arching and anti-blocking device 354 is installed on the outside. The bottom coal feeder 352 is installed at the lower outlet of the furnace front coal bunker.

[0040] The production scheduling and control subsystem 4 consists of a unified scheduling and management module for coal arrivals from various coal mines in the park, a coal management module for power plants, an automatic vehicle information acquisition module, an online coal quality sampling and testing module, a comprehensive management module for material yards, a gas detection and monitoring and safety ventilation module, and an automatic equipment operation control module.

[0041] A production method using a power plant raw coal process system includes the following steps:

[0042] S1: Based on the coal consumption and quality requirements of the power plant's coal management module, the unified coal dispatch management module of each coal mine in the park promptly feeds back the demand information to the relevant coal mines, and each mine transports the raw coal that meets the requirements to the power plant.

[0043] S2: When the train arrives with coal, the train vehicle information is first automatically identified by the train vehicle information automatic acquisition device 111, and the coal quality is sampled and tested by the train coal sampling device 112 and the train coal quality rapid detection device 113. The coal is then transported to the top of the unloading ditch 114 for unloading, and then transported to the return coal system 14 by the impeller feeder 115 and the train coal belt conveyor 116 located at the bottom of the unloading ditch 114.

[0044] S3: When the truck arrives with coal, it is first automatically identified by the vehicle information automatic acquisition device 121, and the coal quality is sampled and tested by the truck coal sampling device 122 and the truck coal rapid quality detection device 123. Then, the coal is transported to the through unloading ditch 124 for unloading, and then transported to the return coal system 14 by the vibrating coal feeder 125 at the bottom of the unloading ditch 124 and the truck coal belt conveyor 126.

[0045] S4: The coal mine direct coal processing unit 13 directly transports coal from each coal mine to the coal return system 14.

[0046] S5: The coal handling unit 11 (train), coal handling unit 12 (truck), and direct coal handling unit 13 (coal mine) transport coal to the stockpiling facility 22 located in the storage yard 21 via the return coal system 14 at certain time intervals according to the pre-set raw coal homogenization scheme. The direct coal handling unit 13 can also directly transport various raw coals produced by the coal mine to the first coal transportation system 31. Vehicle information and coal quality status are uploaded to the production scheduling and control subsystem 4 in real time.

[0047] S6: Raw coal is stacked in two piles, A and B, in storage yard 21. Each pile is long and narrow. Pile A contains coal of different qualities that has been layered and dried to meet the power plant's specifications. Pile B contains coal of different types that has been layered and dried according to a pre-set homogenization ratio. During stacking, stacking facility 22 moves back and forth on top of pile B, stacking raw coal of different qualities in layers according to the ratio. Depending on the coal quality, each pile can have over a hundred layers. During retrieval, retrieval facility 23 retrieves material from one end of pile A using a "full-section cutting" method from top to bottom, ensuring that the ratio of raw coal of different qualities remains constant to achieve homogeneous and stable raw coal. After all the raw coal in pile A has been retrieved, stacking facility 22 starts stacking again at the location of pile A, while retrieval facility 23 starts retrieving material from pile B. In this way, piles A and B are used alternately and cyclically.

[0048] S7: The raw coal taken out by the material taking facility 23 is transported to the silo group 32 for buffer storage through the first coal conveying system 31. According to the coal quality in each silo, it can be mixed again by the coal feeder 322 at the bottom of the silo. Finally, it is transported to the coal bunker 35 in front of the furnace by the silo belt conveyor 323 and the second coal conveying system 33 for boiler combustion. The coal quality online detection device 34 in the coal bunker detects the coal quality in real time.

[0049] S8: During the production process, the coal quality online sampling and testing module of the production scheduling and control subsystem 4 can test the coal quality of incoming coal, the coal quality during the homogenization process, and the coal quality of the final product at three stages to ensure that the coal quality meets the power plant's index requirements. The material yard comprehensive management module controls the operation of the intelligent lighting, ventilation and dehumidification system and the coal slurry water infiltration purification and collection system according to the moisture content of the coal quality, and controls the stacking facility 22 and the material handling facility 23 to operate in real time according to the set raw coal homogenization scheme, so as to realize the layered storage of raw coal and full-section material handling. The gas detection and monitoring and safety ventilation module monitors the material yard 21 to ensure safe operation. The equipment automatic operation control module remotely controls various equipment according to the set operation program to realize automation and unattended operation.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A production method for a power plant raw coal process system, comprising the following steps: S1: Based on the coal consumption and quality requirements of the power plant's coal management module, the unified coal dispatch management module of each coal mine in the park promptly feeds back the demand information to the relevant coal mines, and each mine transports the raw coal that meets the requirements to the power plant. S2: When the train arrives with coal, the train vehicle information is automatically identified by the train vehicle information automatic acquisition device (111), and the coal quality is sampled and tested by the train coal sampling device (112) and the train coal quality rapid detection device (113). The coal is then transported to the top of the train unloading ditch (114) for unloading. The coal is then transported to the return coal system (14) by the impeller feeder (115) and the train coal belt conveyor (116) located at the bottom of the train unloading ditch (114). S3: When the truck arrives with coal, it first automatically identifies the vehicle by the vehicle information acquisition device (121), samples and tests the coal quality by the truck coal sampling device (122) and the truck coal quality rapid detection device (123), and then transports the coal to the through unloading ditch (124) for unloading. The coal is then transported to the return coal system (14) by the vibrating feeder (125) at the bottom of the through unloading ditch (124) and the truck coal belt conveyor (126). S4: The coal mine direct coal processing unit (13) directly transports coal from each coal mine to the coal return system (14). S5: The coal handling unit (11) for trains, the coal handling unit (12) for trucks, and the coal handling unit (13) for direct coal from the coal mine transport coal to the stockpiling facility (22) located in the storage yard (21) at certain time intervals through the coal return system (14) according to the established raw coal homogenization scheme. Alternatively, the coal handling unit (13) for direct coal from the coal mine can directly transport various raw coals produced by the coal mine to the first coal transportation system (31). Vehicle information and coal quality are uploaded to the production scheduling and control subsystem (4) in real time. S6: When stacking materials, the stacking facility (22) moves back and forth on the top of the B material pile to stack raw coal of different qualities in proportion. When taking materials, the taking facility (23) takes materials from one end of the A material pile in a "full-section cutting" manner from top to bottom to ensure that the proportion of raw coal of different qualities remains unchanged, so as to achieve homogeneous and stable raw coal. After all the raw coal in the A material pile is taken out, the stacking facility (22) starts stacking materials again at the position of the A material pile, while the taking facility (23) starts taking materials from the B material pile. In this way, the A and B material piles are used alternately in a cycle. S7: The raw coal taken out by the material taking facility (23) is transported to the silo group (32) for buffer storage through the first coal conveying system (31). According to the coal quality in each silo, it is mixed again by the coal feeder (322) at the bottom of the silo. Finally, it is transported to the coal bunker system (35) in front of the furnace by the coal conveyor belt (323) and the second coal conveying system (33) for boiler combustion. The coal quality online detection device (34) in the coal bunker detects the coal quality in real time. S8: The coal quality online sampling and testing module of the production scheduling control subsystem (4) tests the coal quality of incoming coal, the coal quality of the homogenization process and the coal quality of the final product in three stages to ensure that the coal quality meets the power plant's index requirements. The material yard comprehensive management module controls the operation of the intelligent lighting, ventilation and dehumidification system and the coal slurry water infiltration purification and collection system according to the moisture content of the coal quality, and controls the stacking facilities (22) and the material taking facilities (23) in real time according to the set raw coal homogenization scheme to realize the layered storage of raw coal and the full-section material taking. The gas detection monitoring and safety ventilation module monitors the storage yard (21) to ensure safe operation. The equipment automatic operation control module remotely controls various equipment according to the set operation program.

2. The production method of a power plant raw coal process system according to claim 1, characterized in that, In step S6, the raw coal is piled into two piles, A and B, in the storage yard (21). Each pile is long and narrow. Pile A is a product that has been layered and piled with coal of different qualities according to the proportion and has been dried to meet the power plant's requirements. Pile B is a product that has been layered and piled with coal of different types according to the set homogenization ratio and dried.

3. A power plant raw coal processing system, characterized in that, The production method of the power plant raw coal process system according to claim 1 is adopted. The process system includes a coal receiving subsystem (1), a homogenization subsystem (2), a secondary mixing and storage subsystem (3), and a production scheduling and control subsystem (4). The coal receiving subsystem (1) includes a coal handling unit (11) for coal arriving by train, a coal handling unit (12) for coal arriving by truck, a coal mine direct coal handling unit (13), and a coal return system (14). The homogenization subsystem (2) includes a storage yard (21), a stockpiling facility (22), and a reclaiming facility (23). The secondary mixing and storage subsystem (24) includes a coal receiving subsystem (15), a coal handling unit (16), a coal handling unit (17), a coal handling unit (18), a coal handling unit (19), a coal handling unit (20), a coal handling unit (21), a coal handling unit (22), a coal handling unit (23), and a coal return system (24). System (3) includes a first coal transportation system (31), a silo group (32), a second coal transportation system (33), an online coal quality detection device (34), and a furnace front coal bunker system (35). Coal from the train coal processing unit (11), the truck coal processing unit (12), and the direct coal processing unit (13) is transported to the homogenization subsystem (2) via the return coal system (14). Coal from the homogenization subsystem (2) is output to the silo group (32) via the first coal transportation system (31), and coal from the silo group (32) is output to the furnace front coal bunker system (35) via the second coal transportation system (33).

4. The power plant raw coal process system according to claim 3, characterized in that: The train coal processing unit (11) includes an automatic train vehicle information acquisition device (111), a train coal sampling device (112), a train coal quality rapid detection device (113), a train unloading ditch (114), an impeller feeder (115), and a train coal belt conveyor (116). The train unloading ditch (114) is arranged in two rows and has internal partition walls to meet the requirements of simultaneous unloading and separate storage and transportation of two trains with different coal types. A fully enclosed coal shed is set on the top of the train coal processing unit (11) and a spray dust suppression facility is installed inside.

5. A power plant raw coal process system according to claim 3, characterized in that: The truck coal processing unit (12) includes a vehicle information acquisition device (121), a truck coal sampling device (122), a truck coal rapid quality detection device (123), a through-type unloading ditch (124), a vibrating feeder (125), and a truck coal belt conveyor (126). A fully enclosed coal shed is set on the top of the truck coal processing unit (12), and a spray dust suppression facility is installed inside.

6. A power plant raw coal processing system according to claim 3, characterized in that: The storage yard (21) is rectangular in shape and is arranged in a semi-underground manner. The upper part is a fully enclosed coal shed. The top of the coal shed is equipped with an intelligent lighting, ventilation and dehumidification system. The bottom of the storage yard is laid with different particle sizes of slag and coal slurry water seepage purification and collection system. The fully enclosed coal shed is equipped with a gas detection and monitoring and ventilation safety system.

7. A power plant raw coal process system according to claim 6, characterized in that: The stacking facility (22) and the reclaiming facility (23) are located on both sides of the long direction of the fully enclosed storage yard (21), operate independently and do not interfere with each other; the reclaiming facility (23) spans the entire stack to carry out the reclaiming step; the material is stacked in two piles in the storage yard (21) through the action of the stacking facility (22).

8. A power plant raw coal process system according to claim 3, characterized in that: The silo complex (32) includes four silos, a top unloading facility (321), a bottom coal feeder (322), a coal conveying belt conveyor (323), a silo level monitoring device (324), and a silo anti-arching and anti-blocking device (325). The storage capacity of the four silos meets the power plant's fuel buffering requirements. The first coal conveying system (31) outputs coal to the top unloading facility (321), which is located above each silo. Each silo is equipped with a silo material level monitoring device (324) and a silo anti-arching and anti-blocking device (325). Each silo has a bottom coal feeder (322) at its lower outlet. All coal on the bottom coal feeders (322) of the silos is output to the coal conveying belt conveyor (323). The coal on the coal conveying belt conveyor (323) is output to the second coal conveying system (33). The second coal conveying system (33) is equipped with an online coal quality detection device (34).

9. A power plant raw coal process system according to claim 3, characterized in that: The furnace front coal bunker system (35) includes a furnace front coal bunker, a coal bunker top unloading facility (351), a coal bunker bottom feeder (352), a coal bunker level monitoring device (353), and a coal bunker anti-arching and anti-blocking device (354). The coal bunker top unloading facility (351) is located above the furnace front coal bunker. The coal from the second coal conveying system (33) is output to the coal bunker top unloading facility (351). The coal from the coal bunker top unloading facility (351) is transported to the inside of the furnace front coal bunker. The furnace front coal bunker is equipped with a coal bunker level monitoring device (353) and a coal bunker anti-arching and anti-blocking device (354). A coal bunker bottom feeder (352) is installed at the lower outlet of the furnace front coal bunker.

10. A power plant raw coal process system according to claim 3, characterized in that: The production scheduling and control subsystem (4) consists of a unified scheduling and management module for coal arrivals from various coal mines in the park, a coal management module for power plants, an automatic vehicle information acquisition module, an online coal quality sampling and testing module, a comprehensive management module for material yards, a gas detection and monitoring and safety ventilation module, and an automatic equipment operation control module.

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