An apparatus and method for online analysis of coal quality

Abstract

The application discloses a device and method for online analysis of coal quality, relates to the technical field of coal quality detection, and comprises a coal quality detector, wherein an internal flue gas detector is fixedly arranged in the coal quality detector, an upper exhaust hole is formed in the top of the coal quality detector, and a flue gas filtering mechanism is arranged on the top of the coal quality detector and above the upper exhaust hole. The application has the beneficial effects that: by adopting the integrated structure, when the coal quality is detected and analyzed, the coal blocks can be directly put into the ore processing box for crushing, screening and feeding in the ore processing box, so that the workers do not need to pre-process the coal blocks into coal powder at other places before detection, and then the test detection is carried out, the detection of the coal quality is more convenient, the pollution possibly caused by the coal combustion can be estimated by analyzing the flue gas, and the detection effect of the coal quality is better.

Description

An apparatus and method for online coal quality analysis Technical Field

[0001] This invention relates to the field of coal quality testing technology, specifically to a device and method for online coal quality analysis. Background Technology

[0002] Coal is one of the world's most important energy sources for production and daily life, and also a crucial raw material for the metallurgical and chemical industries. It is primarily composed of elements such as carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, with carbon, hydrogen, and oxygen accounting for over 95% of the organic matter. Coal is formed at normal temperature and pressure on the Earth's surface from plant remains deposited in stagnant water through peatification or saponification. Due to differences in the time, location, and environment of coal formation, the quality of coal varies between different regions, and even between different coal blocks within the same region. Furthermore, coal blocks from different locations also exhibit different qualities, including varying combustibility and residues. Currently, the common method for testing coal quality before mining involves conducting combustion tests using pulverized coal to determine combustion rate, combustion quality, and residue information. However, since coal blocks cannot be processed into pulverized coal within coal mines, real-time testing is inconvenient. Therefore, we propose a device and method for online coal quality analysis. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an apparatus and method for online coal quality analysis, solving the problems mentioned in the background section.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a device for online coal quality analysis, comprising a coal quality analyzer, an internal flue gas analyzer fixedly installed inside the coal quality analyzer, an upper exhaust port on the top of the coal quality analyzer, a flue gas filtration mechanism on the top of the coal quality analyzer above the upper exhaust port, a bottom feeding port on the bottom of the coal quality analyzer, a bottom powder storage tank fixedly installed at the bottom of the coal quality analyzer, a first moving piston slidably connected inside the bottom powder storage tank, a gas supply pipe fixedly installed on one side of the bottom powder storage tank, an installation pipe fixedly installed inside the gas supply pipe, a sealing valve fixedly installed inside the installation pipe, a fixing clamp fixedly installed on one side of the coal quality analyzer, and the coal quality analyzer... A pressure tank is fixedly installed with a fixed clamp. The end of the gas supply pipe away from the bottom powder storage tank is fixedly connected to the pressure tank. A powder feeding pipe is fixedly installed on one side of the bottom powder storage tank. An ore processing box is fixedly installed on the end of the powder feeding pipe away from the bottom powder storage tank. The ore processing box is fixedly connected to a coal quality analyzer. A side transmission box is fixedly installed on one side of the ore processing box. A drive mechanism is installed inside the side transmission box. A first crushing roller and a second crushing roller are rotatably connected to the top of the inner wall of the ore processing box. The first crushing roller and the second crushing roller mesh. A screening device is installed inside the ore processing box and below the first crushing roller. A feeding mechanism is installed inside the ore processing box and below the screening device. A powder feeding hole is opened on the side of the ore processing box near the powder feeding pipe.

[0005] Preferably, the flue gas filtration mechanism includes a flue gas treatment box, which is fixedly installed on the top of the coal quality detector. A support frame is fixedly installed at the bottom of the flue gas treatment box. A first barrier net is fixedly installed inside the flue gas treatment box and above the upper exhaust port. A filter plate is fixedly installed inside the flue gas treatment box. A second barrier net is fixedly installed inside the flue gas treatment box and on the side of the filter plate away from the first barrier net.

[0006] Preferably, the bottom of the powder storage tank is provided with an exhaust groove, an exhaust pipe is fixedly installed at the bottom of the powder storage tank and below the exhaust groove, a first solenoid valve is fixedly installed on the outside of the exhaust pipe, a telescopic rod is fixedly installed on the top of the inner wall of the pressure tank, a second movable piston is fixedly installed at the output end of the telescopic rod, a pressure sensor is fixedly installed on the bottom of the inner wall of the pressure tank, a connecting pipe is fixedly installed on one side of the pressure tank, and a second solenoid valve is fixedly installed on the outside of the connecting pipe.

[0007] Preferably, the drive mechanism includes a first servo motor, which is fixedly installed on one side of the side transmission box. The output end of the first servo motor passes through the interior of the side transmission box and is fixedly installed with a first pulley. A second pulley is rotatably connected inside the side transmission box and above the first pulley. A third pulley is rotatably connected inside the side transmission box and on one side between the first and second pulleys. A transmission belt is sleeved on the outside of the first pulley, the second pulley, and the third pulley. One end of the second pulley is fixedly connected to one end of the first crushing roller.

[0008] Preferably, an inner reinforcing plate is fixedly installed on the top and bottom of one side of the inner wall of the ore processing box. Two connecting columns are fixedly installed on one side of each of the two inner reinforcing plates. A first connecting hole is opened inside the connecting column. A second closed door is provided on one side of the ore processing box. A second connecting hole that cooperates with the connecting column is opened inside the second closed door. A first connecting rod is inserted inside the first connecting hole. A blocking block is fixedly installed on one side of the first connecting rod.

[0009] Preferably, the screening mechanism includes a rotating screen plate rotatably connected to one side of a connecting column. A bottom contact plate is fixedly installed at the bottom of the rotating screen plate. A clearance groove is provided on one side of the rotating screen plate. An upper screen plate is slidably connected inside the rotating screen plate. Multiple screen holes are provided inside the upper screen plate. A return spring is fixedly installed on one side of the upper screen plate. The end of the return spring away from the upper screen plate is fixedly connected to the rotating screen plate. A stop rod is fixedly installed on the top of the upper screen plate near the return spring. The width of the stop rod is equal to the internal width of the ore processing box. A drive inclined block is fixedly installed on the inner wall of the ore processing box near the clearance groove and above the clearance groove. A rotating shaft is rotatably connected inside the ore processing box and below the rotating screen plate. One end of the rotating shaft is fixedly connected to a third pulley. Two rotating cams are fixedly installed on the outer side of the rotating shaft.

[0010] Preferably, the feeding mechanism includes a side sliding groove, which is opened on both sides of the ore processing box. An inner sliding block is slidably connected inside the side sliding groove. A vibration spring is fixedly installed at the bottom of the inner sliding block and inside the side sliding groove. The vibration spring is fixedly connected to the bottom of the inner wall of the side sliding groove. An inclined receiving plate is fixedly installed on one side of the inner sliding block. A rotating crankshaft is rotatably connected to the inner wall of the ore processing box and below the inclined receiving plate. One end of the rotating crankshaft is fixedly connected to one end of the first pulley. A second connecting rod is rotatably connected to the outside of the rotating crankshaft. The second connecting rod is rotatably connected to the bottom of the inclined receiving plate.

[0011] Preferably, a first closed door is rotatably connected to one side of the coal quality tester, and a handle is fixedly installed on one side of the first closed door. A material chute is opened on one side of the ore processing box, and a material chute sealing plate is rotatably connected inside the material chute. An ore input trough is opened on the top of the ore processing box, and a feeding hopper is fixedly installed on the top of the ore processing box and above the ore input trough.

[0012] A method of using a device for online coal quality analysis includes the following steps:

[0013] S1. Coal crushing: The step of crushing large coal blocks or granules into powder.

[0014] S2, Coal powder screening: This step involves screening the pulverized coal powder to ensure that the remaining coal powder particles are small.

[0015] S3, Pressurized Powder Injection: The step of pressurizing and spraying the screened coal powder into the combustion chamber;

[0016] S4. Coal quality testing: Coal powder is moved to a coal quality detector by slow injection, and its coal content is tested using existing instruments.

[0017] S5. Combustion test: This step involves breaking up coal powder and spraying it into a coal quality tester using a rapid injection method, and then igniting the coal powder filling the combustion chamber using an ignition device.

[0018] S6. Data Detection: The steps of analyzing and organizing the combustion heat, combustion time, and residue of pulverized coal.

[0019] S7. Flue gas treatment: The step of filtering the flue gas after pulverized coal combustion.

[0020] This invention provides an apparatus and method for online coal quality analysis, which has the following beneficial effects:

[0021] 1. The equipment and method for online coal quality analysis adopts an integrated structure. When conducting coal quality testing and analysis, coal blocks can be directly placed into the ore processing box for crushing, screening, and feeding processes. This eliminates the need for operators to pre-process the coal blocks into coal powder elsewhere before testing, making coal quality testing more convenient. Furthermore, by analyzing the flue gas, the potential pollution after coal combustion can be predicted, resulting in better coal quality testing results.

[0022] 2. The equipment and method for online coal quality analysis adopts an air-jet coal quality detection method. Different methods can be used to detect coal quality or conduct combustion tests. When detecting coal quality, it can be slowly pushed into the coal quality detector. When conducting combustion tests, coal powder is rapidly pushed out and dispersed into the coal quality detector, facilitating combustion testing. The testing method can be freely adjusted as needed, making it more convenient to use. Attached Figure Description

[0023] Figure 1 is a schematic diagram of the structure of the present invention;

[0024] Figure 2 is a cross-sectional structural diagram of the present invention;

[0025] Figure 3 is a schematic diagram of the unfolded structure of the present invention;

[0026] Figure 4 is a cross-sectional view of the flue gas treatment box of the present invention;

[0027] Figure 5 is a schematic diagram of the ore processing box of the present invention;

[0028] Figure 6 is a cross-sectional view of the ore processing box of the present invention;

[0029] Figure 7 is a cross-sectional view of the ore processing box of the present invention from another perspective;

[0030] Figure 8 is a schematic diagram of the unfolded structure of the ore processing box of the present invention;

[0031] Figure 9 is a schematic diagram of the side transmission box of the present invention;

[0032] Figure 10 is a partial structural schematic diagram of the present invention;

[0033] Figure 11 is a schematic diagram of the closed flap structure of the present invention;

[0034] Figure 12 is an enlarged view of point A in Figure 2 of this invention.

[0035] In the diagram: 1. Coal quality detector; 2. First closed door; 3. Handle; 4. Upper exhaust port; 5. Flue gas treatment box; 6. Support frame; 7. First barrier net; 8. Filter plate; 9. Second barrier net; 10. Bottom feeding hole; 11. Bottom powder storage tank; 12. First moving piston; 13. Exhaust trough; 14. Exhaust pipe; 15. First solenoid valve; 16. Gas delivery pipe; 17. Installation pipe; 18. Sealing flap; 19. Fixing clamp; 20. Pressure tank; 21. Telescopic rod; 22. Second moving piston; 23. Connecting pipe; 24. Second solenoid valve; 25. Pressure sensor; 26. Internal flue gas detector; 27. Fixed bracket; 28. Ore processing box; 29. ​​Ore feeding trough; 30. Internal reinforcing plate; 31. Connecting column; 32. First connecting hole; 33. Second sealing... 34. Closed door; 35. First connecting rod; 36. Stop block; 37. Second connecting hole; 38. Side transmission box; 39. First servo motor; 40. First pulley; 41. Second pulley; 42. Third pulley; 43. Transmission belt; 44. First crushing roller; 45. Second crushing roller; 46. Feeding hopper; 47. Rotating screen plate; 48. Bottom contact plate; 49. Clearance groove; 50. Upper screen plate; 51. Screen hole; 52. Return spring; 53. Stop rod; 54. Drive inclined block; 55. Rotating shaft; 56. Rotating cam; 57. Powder feeding hole; 58. Powder feeding pipe; 59. Side sliding groove; 60. Inner sliding block; 61. Vibration spring; 62. Inclined receiving plate; 63. Rotating crankshaft; 64. Second connecting rod; 65. Picking trough; 66. Picking sealing plate. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] Please refer to Figures 1 to 12. This invention provides a technical solution: a device for online coal quality analysis, including a coal quality analyzer 1. A fixed support 27 is provided below the coal quality analyzer 1. An internal flue gas analyzer 26 is fixedly installed inside the coal quality analyzer 1. An upper exhaust port 4 is opened at the top of the coal quality analyzer 1. A flue gas filter mechanism is provided at the top of the coal quality analyzer 1 and above the upper exhaust port 4. A bottom feeding port 10 is opened at the bottom of the coal quality analyzer 1. A bottom powder storage tank 11 is fixedly installed at the bottom of the coal quality analyzer 1. A first moving piston 12 is slidably connected inside the bottom powder storage tank 11. A baffle is provided inside the bottom powder storage tank 11 and above the mounting pipe 17 to prevent the first moving piston 12 from falling to the bottom of the bottom powder storage tank 11 when there is no high air pressure below. A gas supply pipe 16 is fixedly installed on one side of the bottom powder storage tank 11. An mounting pipe 17 is fixedly installed inside the gas supply pipe 16. A sealing valve 18 is fixedly installed inside the mounting pipe 17. A fixing clamp 19 is fixedly installed on one side of the coal quality analyzer 1. A pressure tank 20 is fixedly installed on the coal quality analyzer 1 via the fixing clamp 19. The end of the gas supply pipe 16 away from the bottom powder storage tank 11 is fixedly connected to the pressure tank 20. A powder delivery pipe 57 is fixedly installed on one side of the bottom powder storage tank 11. An ore processing box 28 is fixedly installed on the end of the powder delivery pipe 57 away from the bottom powder storage tank 11. The ore processing box 28 is fixedly connected to the coal quality analyzer 1. A side... The transmission box 37 has a drive mechanism inside. The top of the inner wall of the ore processing box 28 is rotatably connected to the first crushing roller 43 and the second crushing roller 44. The first crushing roller 43 and the second crushing roller 44 mesh with each other. A screening device is provided inside the ore processing box 28 and below the first crushing roller 43. A feeding mechanism is provided inside the ore processing box 28 and below the screening device. A powder feeding hole 56 is opened on the side of the ore processing box 28 near the powder feeding pipe 57.

[0038] The flue gas filtration mechanism includes a flue gas treatment box 5, which is fixedly installed on the top of the coal quality detector 1. A support frame 6 is fixedly installed at the bottom of the flue gas treatment box 5. A first barrier net 7 is fixedly installed inside the flue gas treatment box 5 and above the upper exhaust port 4. A filter plate 8 is fixedly installed inside the flue gas treatment box 5 and is filled with sponge. A second barrier net 9 is fixedly installed inside the flue gas treatment box 5 on the side of the filter plate 8 away from the first barrier net 7. The flue gas after the coal powder has been burned contains a large number of impurities. The filter plate 8 is used to filter the impurities in the flue gas. Both the first barrier net 7 and the second barrier net 9 are used to prevent debris from falling into the flue gas treatment box 5.

[0039] The bottom of the powder storage tank 11 is provided with an exhaust groove 13. An exhaust pipe 14 is fixedly installed at the bottom of the powder storage tank 11 and below the exhaust groove 13. A first solenoid valve 15 is fixedly installed on the outside of the exhaust pipe 14. A telescopic rod 21 is fixedly installed on the top of the inner wall of the pressure tank 20. A second moving piston 22 is fixedly installed at the output end of the telescopic rod 21. A pressure sensor 25 is fixedly installed on the bottom of the inner wall of the pressure tank 20. A connecting pipe 23 is fixedly installed on one side of the pressure tank 20. A second solenoid valve 24 is fixedly installed on the outside of the connecting pipe 23. By using the pipeline structure, air can be injected into the interior of the powder storage tank 11 after being pressurized, thereby completing the up and down movement of the first moving piston 12.

[0040] The drive mechanism includes a first servo motor 38, which is fixedly installed on one side of the side transmission box 37. The output end of the first servo motor 38 passes through the interior of the side transmission box 37 and is fixedly installed with a first pulley 39. A second pulley 40 is rotatably connected inside the side transmission box 37 and above the first pulley 39. A third pulley 41 is rotatably connected inside the side transmission box 37 and between the first pulley 39 and the second pulley 40. A transmission belt 42 is sleeved on the outside of the first pulley 39, the second pulley 40 and the third pulley 41. One end of the second pulley 40 is fixedly connected to one end of the first crushing roller 43. The drive structure can simultaneously drive the internal structure of the ore processing box 28, effectively saving resources.

[0041] The ore processing box 28 has internal reinforcing plates 30 fixedly installed on the top and bottom of one side of its inner wall. Two connecting columns 31 are fixedly installed on one side of each of the two internal reinforcing plates 30. The connecting columns 31 have a first connecting hole 32 inside. A second sealing door 33 is provided on one side of the ore processing box 28. The second sealing door 33 has a second connecting hole 36 inside that cooperates with the connecting column 31. A first connecting rod 34 is inserted into the first connecting hole 32. A stop block 35 is fixedly installed on one side of the first connecting rod 34. This snap-fit ​​structure makes the connection between the ore processing box 28 and the second sealing door 33 more convenient and tighter.

[0042] The screening mechanism includes a rotating screen plate 46, which is rotatably connected to one side of the connecting column 31. A bottom contact plate 47 is fixedly installed at the bottom of the rotating screen plate 46. A clearance groove 48 is provided on one side of the rotating screen plate 46. An upper screen plate 49 is slidably connected inside the rotating screen plate 46. Multiple screen holes 50 are provided inside the upper screen plate 49. A return spring 51 is fixedly installed on one side of the upper screen plate 49. The end of the return spring 51 away from the upper screen plate 49 is fixedly connected to the rotating screen plate 46. The top of the upper screen plate 49 is near the side of the return spring 51. A stop rod 52 is fixedly installed, the width of which is equal to the internal width of the ore processing box 28. A drive inclined block 53 is fixedly installed on the inner wall of the ore processing box 28, near the side of the relief groove 48 and above the relief groove 48. A rotating shaft 54 ​​is rotatably connected inside the ore processing box 28 and below the rotating screen plate 46. One end of the rotating shaft 54 ​​is fixedly connected to the third pulley 41. Two rotating cams 55 are fixedly installed on the outer side of the rotating shaft 54. Through the reciprocating screening mechanism, the screening effect can be greatly increased.

[0043] The feeding mechanism includes a side sliding groove 58, which is opened on both sides of the ore processing box 28. An inner sliding block 59 is slidably connected inside the side sliding groove 58. A vibration spring 60 is fixedly installed at the bottom of the inner sliding block 59 and inside the side sliding groove 58. The vibration spring 60 is fixedly connected to the bottom of the inner wall of the side sliding groove 58. An inclined receiving plate 61 is fixedly installed on one side of the inner sliding block 59. A rotating crankshaft 62 is rotatably connected to the inner wall of the ore processing box 28 and below the inclined receiving plate 61. One end of the rotating crankshaft 62 is fixedly connected to one end of the first pulley 39. A second connecting rod 63 is rotatably connected to the outside of the rotating crankshaft 62. The second connecting rod 63 is rotatably connected to the bottom of the inclined receiving plate 61.

[0044] The coal quality analyzer 1 is rotatably connected to a first closed door 2 on one side, and a handle 3 is fixedly installed on one side of the first closed door 2, which can collect and process residual coal powder inside the coal quality analyzer 1. A feeding trough 64 is opened on one side of the ore processing box 28, and a feeding sealing plate 65 is rotatably connected inside the feeding trough 64, which can process larger coal powder particles after screening. An ore feeding trough 29 is opened on the top of the ore processing box 28, and a feeding hopper 45 is fixedly installed on the top of the ore processing box 28 and above the ore feeding trough 29.

[0045] A method of using a device for online coal quality analysis includes the following steps:

[0046] S1. Coal crushing: The step of crushing large coal blocks or granules into powder.

[0047] S2, Coal powder screening: This step involves screening the pulverized coal powder to ensure that the remaining coal powder particles are small.

[0048] S3, Pressurized Powder Injection: The step of pressurizing and spraying the screened coal powder into the combustion chamber;

[0049] S4. Coal quality testing: Coal powder is moved to a coal quality detector by slow injection, and its coal content is tested using existing instruments.

[0050] S5. Combustion test: This step involves breaking up coal powder and spraying it into a coal quality tester using a rapid injection method, and then igniting the coal powder filling the combustion chamber using an ignition device.

[0051] S6. Data Detection: The steps of analyzing and organizing the combustion heat, combustion time, and residue of pulverized coal.

[0052] S7. Flue gas treatment: The step of filtering the flue gas after pulverized coal combustion.

[0053] In summary, the equipment and method for online coal quality analysis involves first placing the coal block to be tested into the ore processing box 28 via the feeding hopper 45. Then, the first servo motor 38 is started via an external controller, driving the first pulley 39 to rotate, simultaneously driving the second pulley 40 and the third pulley 41 to rotate. While the second pulley 40 rotates, the first crushing roller 43 rotates, and simultaneously, the second crushing roller 44, which meshes with the first crushing roller 43, rotates. The first and second crushing rollers 43 and 44 grind the coal block into powder, which then falls onto the upper screen plate 49. Due to the rotation of the third pulley 40, the coal is further ground into powder. The synchronous rotation of the rotating shaft 54 ​​causes the rotating cam 55 to intermittently contact the bottom contact plate 47, and causes the rotating screen plate 46 to vibrate around the lower side. As the rotating screen plate 46 and the upper screen plate 49 rise, one side of the upper screen plate 49 contacts the driving inclined block 53 and moves under the action of the driving inclined block 53, compressing the return spring 51. When the rotating cam 55 rotates to the lower end again, the upper screen plate 49 descends synchronously, and then rebounds under the action of the return spring 51. This continuous reciprocating vibration improves the coal powder screening efficiency on the upper screen plate 49. Large, unqualified coal pieces are removed from the material receiving trough 64 by opening the material receiving sealing plate 65 when the equipment stops working. The screened coal powder can then be fed into the bottom powder storage tank 11. The rotation of the first pulley 39 drives the crankshaft 62 to rotate, and simultaneously moves the second connecting rod 63. At this time, the inclined receiving plate 61 moves up and down inside the ore processing box 28 under the pull of the second connecting rod 63, thus feeding the coal powder from the feeding hole 56 into the feeding pipe 57 when it rises to a higher position. After the coal powder falls into the bottom powder storage tank 11, it falls above the first moving piston 12. Then, the second solenoid valve 24 is opened, and the connecting pipe 23 is connected to the gas tank. The gas tank continuously fills the pressure tank 20 with gas. When the pressure sensor 25 detects that the internal pressure of the pressure tank 20 has reached a predetermined value, the second solenoid valve 24 is closed. Solenoid valve 24, then telescopic rod 21 moves upward quickly or slowly as needed. As telescopic rod 21 extends, the air pressure in the lower half of pressurized tank 20 continuously increases, making the air pressure sufficient to open sealing valve 18. Then, high-pressure air enters the bottom powder storage tank 11 through air pipe 16, lifting the first moving piston 12 upward, causing the coal powder to move upward under the action of the first moving piston 12. Finally, the state of the coal powder entering the coal quality detector 1 is determined by the speed of telescopic rod 21. When the speed is extremely high, the coal powder on the first moving piston 12 is completely thrown up by inertia and floats inside the coal quality detector 1 for a short time. At this time, it can be ignited using the built-in ignition mechanism for combustion detection.At slower speeds, there is less inertia, and the first moving piston 12 blocks the bottom feeding hole 10 from below, exposing the coal powder inside for easy detection. After combustion detection, the flue gas produced is detected by the internal flue gas detector 26 and filtered through the filter plate 8 before being discharged. Once the detection is complete, the first solenoid valve 15 is activated, using the exhaust pipe 14 to expel the high-pressure air from the bottom coal powder storage tank 11, facilitating the next detection.

[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for online coal quality analysis, comprising a coal quality analyzer (1) and a screening mechanism, characterized in that: An internal flue gas detector (26) is fixedly installed inside the coal quality detector (1). An upper exhaust port (4) is opened on the top of the coal quality detector (1). A flue gas filtration mechanism is set on the top of the coal quality detector (1) and above the upper exhaust port (4). A bottom feeding port (10) is opened at the bottom of the coal quality detector (1). A bottom powder storage tank (11) is fixedly installed at the bottom of the coal quality detector (1). A first moving piston (12) is slidably connected inside the bottom powder storage tank (11). A gas supply pipe (16) is fixedly installed on one side of the bottom powder storage tank (11). An installation pipe (1) is fixedly installed inside the gas supply pipe (16). 7) A sealing valve (18) is fixedly installed inside the installation pipe (17). A fixing clamp (19) is fixedly installed on one side of the coal quality tester (1). A pressure tank (20) is fixedly installed on the coal quality tester (1) through the fixing clamp (19). The end of the gas transmission pipe (16) away from the bottom powder storage tank (11) is fixedly connected to the pressure tank (20). A powder delivery pipe (57) is fixedly installed on one side of the bottom powder storage tank (11). An ore processing box (28) is fixedly installed on the end of the powder delivery pipe (57) away from the bottom powder storage tank (11). The ore processing box (28) is fixedly connected to the coal quality tester (1). A side transmission box (37) is fixedly installed on one side of (28). A drive mechanism is provided inside the side transmission box (37). A first crushing roller (43) and a second crushing roller (44) are rotatably connected to the top of the inner wall of the ore processing box (28). The first crushing roller (43) and the second crushing roller (44) mesh. A screening device is provided inside the ore processing box (28) and below the first crushing roller (43). A feeding mechanism is provided inside the ore processing box (28) and below the screening device. A powder feeding hole (56) is opened on the side of the ore processing box (28) near the powder feeding pipe (57). The bottom powder storage tank (1) 1) has an exhaust groove (13) at the bottom. An exhaust pipe (14) is fixedly installed at the bottom of the bottom powder storage tank (11) and below the exhaust groove (13). A first solenoid valve (15) is fixedly installed on the outside of the exhaust pipe (14). A telescopic rod (21) is fixedly installed on the top of the inner wall of the pressure tank (20). A second moving piston (22) is fixedly installed at the output end of the telescopic rod (21). A pressure sensor (25) is fixedly installed at the bottom of the inner wall of the pressure tank (20). A connecting pipe (23) is fixedly installed on one side of the pressure tank (20). A second solenoid valve (24) is fixedly installed on the outside of the connecting pipe (23).

2. The device for online coal quality analysis according to claim 1, characterized in that: The flue gas filtration mechanism includes a flue gas treatment box (5), which is fixedly installed on the top of the coal quality detector (1). A support frame (6) is fixedly installed at the bottom of the flue gas treatment box (5). A first barrier net (7) is fixedly installed inside the flue gas treatment box (5) and above the upper exhaust hole (4). A filter plate (8) is fixedly installed inside the flue gas treatment box (5). A second barrier net (9) is fixedly installed inside the flue gas treatment box (5) and on the side of the filter plate (8) away from the first barrier net (7).

3. The device for online coal quality analysis according to claim 1, characterized in that: The drive mechanism includes a first servo motor (38), which is fixedly installed on one side of the side transmission box (37). The output end of the first servo motor (38) passes into the interior of the side transmission box (37) and is fixedly installed with a first pulley (39). A second pulley (40) is rotatably connected inside the side transmission box (37) and above the first pulley (39). A third pulley (41) is rotatably connected inside the side transmission box (37) and on one side between the first pulley (39) and the second pulley (40). A transmission belt (42) is sleeved on the outside of the first pulley (39), the second pulley (40) and the third pulley (41). One end of the second pulley (40) is fixedly connected to one end of the first crushing roller (43).

4. The device for online coal quality analysis according to claim 1, characterized in that: The top and bottom of one side of the inner wall of the ore processing box (28) are fixedly installed with inner reinforcing plates (30). Two connecting columns (31) are fixedly installed on one side of each of the two inner reinforcing plates (30). A first connecting hole (32) is opened inside the connecting column (31). A second closed door (33) is provided on one side of the ore processing box (28). A second connecting hole (36) that cooperates with the connecting column (31) is opened inside the second closed door (33). A first connecting rod (34) is inserted inside the first connecting hole (32). A stop block (35) is fixedly installed on one side of the first connecting rod (34).

5. The device for online coal quality analysis according to claim 1, characterized in that: The screening mechanism includes a rotating screen plate (46), which is rotatably connected to one side of the connecting column (31). A bottom contact plate (47) is fixedly installed at the bottom of the rotating screen plate (46). A clearance groove (48) is provided on one side of the rotating screen plate (46). An upper screen plate (49) is slidably connected inside the rotating screen plate (46). A plurality of screen holes (50) are provided inside the upper screen plate (49). A return spring (51) is fixedly installed on one side of the upper screen plate (49). The end of the return spring (51) away from the upper screen plate (49) is fixedly connected to the rotating screen plate (46). A stop rod (52) is fixedly installed on the top of the plate (49) near the reset spring (51). The width of the stop rod (52) is equal to the internal width of the ore processing box (28). A drive inclined block (53) is fixedly installed on the inner wall of the ore processing box (28) near the relief groove (48) and above the relief groove (48). A rotating shaft (54) is rotatably connected inside the ore processing box (28) and below the rotating screen plate (46). One end of the rotating shaft (54) is fixedly connected to the third pulley (41). Two rotating cams (55) are fixedly installed on the outer side of the rotating shaft (54).

6. The device for online coal quality analysis according to claim 1, characterized in that: The feeding mechanism includes a side sliding groove (58), which is opened on both sides of the ore processing box (28). An inner sliding block (59) is slidably connected inside the side sliding groove (58). A vibration spring (60) is fixedly installed at the bottom of the inner sliding block (59) and inside the side sliding groove (58). The vibration spring (60) is fixedly connected to the bottom of the inner wall of the side sliding groove (58). An inclined receiving plate (61) is fixedly installed on one side of the inner sliding block (59). A rotating crankshaft (62) is rotatably connected to the inner wall of the ore processing box (28) and below the inclined receiving plate (61). One end of the rotating crankshaft (62) is fixedly connected to one end of the first pulley (39). A second connecting rod (63) is rotatably connected to the outside of the rotating crankshaft (62). The second connecting rod (63) is rotatably connected to the bottom of the inclined receiving plate (61).

7. The device for online coal quality analysis according to claim 1, characterized in that: The coal quality tester (1) is rotatably connected to a first closed door (2) on one side, and a handle (3) is fixedly installed on one side of the first closed door (2). A material chute (64) is opened on one side of the ore processing box (28), and a material chute sealing plate (65) is rotatably connected inside the material chute (64). An ore input chute (29) is opened on the top of the ore processing box (28), and a feeding hopper (45) is fixedly installed on the top of the ore processing box (28) and above the ore input chute (29).

8. The method of using the equipment for online coal quality analysis according to claim 1, characterized in that: Includes the following steps: S1. Coal Pulverization: Crushing larger coal lumps or particles into powder; S2. Coal Powder Screening: Screening the pulverized coal powder to ensure that the remaining coal particles are small; S3. Pressurized Powder Injection: Pressurizing and spraying the screened coal powder into the combustion chamber; S4. Coal Quality Testing: Moving the coal powder to a coal quality detector using a slow injection method and testing its coal content using existing instruments; S5. Combustion Test: Dispersing the coal powder using a rapid injection method and spraying it into the coal quality detector, then igniting the coal powder filling the combustion chamber using an ignition device; S6. Data Detection: Analyzing and processing the combustion heat, combustion time, and residue of the coal powder; S7. Flue Gas Treatment: Filtering the flue gas after coal powder combustion.

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