Module type coal quality on-line detection pretreatment system

Abstract

The utility model provides a modular coal quality on-line detection pretreatment system. The modular coal quality on-line detection pretreatment system comprises a rack, a feeding device, a disc feeder, a mixing device, a belt conveyor, a shaping and flattening device, a rapid detection analyzer, a waste material screw feeder and a control cabinet, the feeding device, the disc feeder, the uniform mixing device, the belt conveyor, the waste material screw feeder and the control cabinet are fixed on the rack; the shaping and flattening device and the rapid detection analyzer are fixed on the belt conveyor; according to the utility model, the coal sample is automatically detected and analyzed through the rapid detection analyzer, so that the labor cost is reduced, and the detection efficiency is improved; a coal sample is shaped and flattened through the shaping and flattening device, so that a coal seam enters the rapid detection analyzer to be detected in a form meeting the optimal use requirements of the rapid detection analyzer, and the requirements of the rapid detection analyzer on online detection of moisture, heat value, ash content, fixed carbon, volatile components, sulfur content and the like of the coal sample are met; and the accuracy of a coal sample analysis result is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal quality detection equipment, in particular to a modular coal quality online detection preprocessing system. Background Art

[0002] In the current coal industry production, coal quality testing is a crucial link. As an important energy resource, the quality of coal directly affects combustion efficiency, environmental emissions and the market competitiveness of products. The traditional coal quality testing method mainly relies on manual sampling and sending it to the laboratory for analysis, which has many shortcomings. First, the process of manual sampling and sample delivery is time-consuming and easily affected by human factors, resulting in a long detection cycle and unable to meet the demand for real-time data in industrial production. Secondly, due to the limitations of sampling, the sample may not fully represent the characteristics of the entire coal reserves, thus affecting the accuracy of the test results. In addition, the traditional detection method also has delays in data transmission and analysis, and it is impossible to detect coal quality abnormalities in time, making it difficult to achieve early warning and regulation. Although the existing rapid detection analyzer can automatically detect and analyze coal, it is necessary to ensure that the thickness of the coal surface to be detected is 36mm, plus or minus 0.5mm, the surface flatness is less than 0.3mm, and the effective detection width is 150mm. It is time-consuming and laborious to pre-process the coal surface manually, and the unqualified processing is likely to affect the detection accuracy. Utility Model Content

[0003] In view of the above-mentioned technical deficiencies, the purpose of the utility model is to provide a modular coal quality online detection preprocessing system to meet the preprocessing requirements of rapid detection analyzers for online detection of moisture, calorific value, ash, fixed carbon, volatile matter, sulfur content, etc. of coal samples, thereby improving the efficiency and accuracy of coal sample analysis.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A modular coal quality online detection pretreatment system comprises a frame, a feeding device, a disc feeder, a mixing device, a belt conveyor, a shaping and flattening device, a rapid detection analyzer, a discarded material spiral feeder and a control cabinet; the feeding device, the disc feeder, the mixing device, the belt conveyor, the discarded material spiral feeder and the control cabinet are fixed on the frame; the feeding device, the disc feeder, the mixing device, the belt conveyor, the shaping and flattening device, the rapid detection analyzer, the discarded material spiral feeder and the control cabinet are electrically connected; the shaping and flattening device and the rapid detection analyzer are fixed on the belt conveyor; the discharge port of the feeding device is connected with the feed port of the disc feeder; the discharge port of the disc feeder is connected with the feed port of the mixing device; the belt conveyor is arranged below the mixing device; the discharge port of the mixing device is arranged toward the feed port of the shaping and flattening device; the feed port of the rapid detection analyzer is connected with the discharge port of the shaping and flattening device; the discarded material spiral feeder is placed below the rear end of the belt conveyor;

[0006] The shaping and flattening device comprises a shaping component and a flattening component; the shaping component comprises a shaping bracket, a material guide trough, a cover plate, and a material flow regulating gate; the shaping bracket is fixed on the belt conveyor, and the front end is connected with the material outlet of the mixing device; the cover plate is fixed to the upper rear end of the shaping bracket; the material guide trough is placed below the cover plate and is fixedly connected to the shaping bracket; the material guide trough is arranged in a trumpet shape, and the width gradually shrinks from the front end of the shaping bracket to the rear end; the material flow regulating gate is movably installed on the cover plate, and the lower end is inserted into the center of the material guide trough;

[0007] The flattening assembly includes a flattening bracket, a flattening drive motor and multiple pressure rollers; the flattening bracket is fixed on the belt conveyor; the pressure roller is rotatably installed on the flattening bracket and is connected to the flattening drive motor; the axial direction of the pressure roller is perpendicular to the conveying direction of the belt conveyor; the multiple pressure rollers are arranged at intervals along the conveying direction of the belt conveyor; the pressure roller is provided with an annular pressure groove, which is arranged corresponding to the rear end of the material guide trough; from the front end of the flattening bracket to the rear end, the setting height of the multiple pressure rollers on the flattening bracket gradually decreases.

[0008] Preferably, the cross-sectional shape of the annular pressing groove is an isosceles trapezoid, and the width of the cross-sectional shape gradually increases from the inner side to the outer side of the pressing roller; the cross-sectional width of the annular pressing grooves of multiple pressing rollers gradually increases from the front end to the rear end of the flattening bracket.

[0009] Preferably, the shaping component further comprises a windshield curtain; the windshield curtain is fixed below the front end of the cover plate and is located between the discharge port of the mixing device and the material guide trough.

[0010] Preferably, the belt conveyor comprises a shell, a conveying bracket, a belt roller, a conveying belt, a conveying motor and a scraper unit; the shell is fixedly connected to the frame; a guide rail is fixedly arranged in the shell; a track wheel is arranged at the bottom of the conveying bracket; the conveying bracket is movably arranged on the guide rail through the track wheel; a plurality of belt rollers are configured and rotatably mounted on the conveying bracket; the conveying belt is mounted on the conveying bracket through the belt rollers; the conveying motor is fixed on the conveying bracket and is transmission-connected with the belt rollers; the scraper unit comprises a scraper bracket, a scraper motor, a scraper chain belt, a scraper sprocket and a scraper; the scraper bracket is fixed below the conveying bracket; the rear end of the scraper bracket is located above the feed port of the discarded material spiral feeder; a plurality of scraper sprockets are configured and rotatably mounted on the scraper bracket; the scraper chain belt is mounted on the scraper bracket through the scraper sprocket; the scraper motor is fixed on the scraper bracket and is transmission-connected with the scraper sprocket; the scraper is fixed on the scraper chain belt.

[0011] Preferably, the feeding device is a crusher or a chute.

[0012] Preferably, rubber sleeves are fixedly sleeved on both sides of the annular pressing groove on the pressing roller; the rubber sleeves are in rolling contact with the conveying belt; an auxiliary roller is rotatably mounted on the conveying bracket; the auxiliary roller is located below the pressing roller and is in rolling contact with the inner side of the conveying belt.

[0013] Preferably, the flattening assembly also includes a cleaning unit; the cleaning unit includes a cleaning bracket, a cleaning plate, a connecting plate, a pulling plate and a tension spring; the cleaning bracket is fixed on the flattening bracket; the upper end of the connecting plate is hinged on the cleaning bracket, and the lower end is fixedly connected to the cleaning plate; the pulling plate is fixed to one side of the connecting plate; one end of the tension spring is fixedly connected to the pulling plate, and the other end is fixedly connected to the cleaning bracket; the cleaning plate is placed in the annular pressure groove and is in frictional contact with the pressure roller.

[0014] Preferably, a material flow detector is provided between the last two pressing rollers at the rear end of the flattening bracket; the material flow detector is fixed on the flattening bracket and electrically connected to the control cabinet.

[0015] Preferably, it also includes a bucket elevator; the bucket elevator is placed at the output end of the discarded material spiral feeder and is fixedly connected to the frame.

[0016] Preferably, the belt conveyor also includes auxiliary rollers; the auxiliary rollers are rotatably installed at the lower end of the conveying bracket and are in rolling contact with the outer side surface of the conveying belt; both ends of the auxiliary rollers are provided with threads with opposite rotation directions; the belt rollers are shaped like a waist drum.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] In the utility model, the coal sample is automatically detected and analyzed by the rapid detection analyzer, so as to reduce the labor cost and improve the detection efficiency; the coal sample is shaped and flattened by the shaping and flattening device, so that the coal seam can enter the rapid detection analyzer for detection in a form that meets the optimal use requirements of the rapid detection analyzer, and the requirements of the rapid detection analyzer for online detection of the moisture, calorific value, ash content, fixed carbon, volatile matter, sulfur content, etc. of the coal sample are met, thereby improving the accuracy of the coal sample analysis results. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a connection relationship diagram of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the belt conveyor in the utility model;

[0022] Figure 4 This is a schematic diagram of the installation position of the auxiliary roller in the utility model on the belt conveyor;

[0023] Figure 5 It is a structural schematic diagram of the shaping component in the utility model;

[0024] Figure 6 It is a three-dimensional structural diagram of the shaping component in the utility model;

[0025] Figure 7 It is a structural schematic diagram of the pressing roller in the utility model;

[0026] Figure 8 It is a structural schematic diagram of the cleaning unit in the utility model.

[0027] in:

[0028] 1. Frame; 2. Mixing device; 3. Feeding device; 4. Disc feeder; 5. Flattening assembly; 51. Cleaning unit; 511. Pull plate; 512. Tension spring; 513. Cleaning bracket; 514. Connecting plate; 515. Cleaning plate; 52. Pressing roller; 521. Rubber sleeve; 522. Annular pressing groove; 53. Flattening bracket; 54. Flattening drive motor; 6. Rapid detection analyzer; 7. Abandoned material spiral feeder machine; 8, belt conveyor; 81, shell; 82, conveying belt; 83, conveying bracket; 84, scraper sprocket; 85, scraper motor; 86, scraper chain; 87, track wheel; 88, guide rail; 89, scraper; 810, belt roller; 811, auxiliary roller; 812, auxiliary roller; 9, shaping component; 91, material flow regulating gate; 92, cover plate; 93, shaping bracket; 94, material guide trough. DETAILED DESCRIPTION

[0029] The utility model will be further described below in conjunction with the accompanying drawings.

[0030] like Figures 1 to 3 As shown, a modular coal quality online detection pretreatment system is arranged in a container, including a frame 1, a feeding device 3, a disc feeder 4, a mixing device 2, a belt conveyor 8, a shaping and flattening device, a rapid detection analyzer 6, a discarded material spiral feeder 7 and a control cabinet; the disc feeder 4, the mixing device 2, the rapid detection analyzer 6 and the discarded material spiral feeder 7 are all existing products; the feeding device 3, the disc feeder 4, the mixing device 2, the belt conveyor 8, the discarded material spiral feeder 7 and the control cabinet are fixed on the frame 1; the feeding device 3, the disc feeder 4, the mixing device 2, the belt conveyor 8. The shaping and flattening device, the rapid detection and analysis instrument 6, and the discarded material spiral feeder 7 are electrically connected to the control cabinet; the shaping and flattening device and the rapid detection and analysis instrument 6 are fixed on the belt conveyor 8; the discharge port of the feeding device 3 is connected with the feed port of the disc feeder 4; the discharge port of the disc feeder 4 is connected with the feed port of the mixing device 2; the belt conveyor 8 is arranged below the mixing device 2; the discharge port of the mixing device 2 is arranged toward the feed port of the shaping and flattening device; the feed port of the rapid detection and analysis instrument 6 is connected with the discharge port of the shaping and flattening device; the discarded material spiral feeder 7 is placed below the rear end of the belt conveyor 8;

[0031] like Figure 1 , Figure 3 , Figure 5 , Figure 6 As shown, the shaping and flattening device includes a shaping component 9 and a flattening component 5; the shaping component 9 includes a shaping bracket 93, a guide trough 94, a cover plate 92, and a material flow regulating gate 91; the shaping bracket 93 is fixed on the belt conveyor 8, and the front end is connected to the discharge port of the mixing device 2; the cover plate 92 is fixed to the upper rear end of the shaping bracket 93; the guide trough 94 is placed below the cover plate 92 and is fixedly connected to the shaping bracket 93; the guide trough 94 is set in a trumpet shape, and the width gradually shrinks from the front end of the shaping bracket 93 to the rear end, that is, the end with a large mouth faces the mixing device 2, and the end with a small mouth faces the rapid detection analyzer 6, and the coal on the belt conveyor 8 is gathered to the center through the guide trough 94; the material flow regulating gate 91 is movably installed on the cover plate 92, and the lower end is inserted into the center of the guide trough 94. The material flow regulating gate 91 can be adjusted up and down to adjust the feeding height, and the material flow regulating gate 91 is fixed and loosened by a commonly used bolt-type adjustment structure;

[0032] like Figure 1 , Figure 3 , Figure 7As shown, the flattening assembly 5 includes a flattening bracket 53, a flattening drive motor 54 and a plurality of pressure rollers 52; the flattening bracket 53 is fixed on the belt conveyor 8; the pressure roller 52 is rotatably mounted on the flattening bracket 53 and is transmission-connected to the flattening drive motor 54; the axial direction of the pressure roller 52 is perpendicular to the conveying direction of the belt conveyor 8; the plurality of pressure rollers 52 are arranged at intervals along the conveying direction of the belt conveyor 8; an annular pressure groove 522 is arranged on the pressure roller 52, and the annular pressure groove 522 is arranged corresponding to the rear end of the guide groove 94, and the coal gathered after passing through the guide groove 94 enters the annular pressure groove 522 and is squeezed and shaped; from the front end to the rear end of the flattening bracket 53, the setting height of the plurality of pressure rollers 52 on the flattening bracket 53 gradually decreases, that is, the distance between the axis of the pressure roller 52 and the upper surface of the belt conveyor 8 gradually decreases, so that after the coal is rolled by the plurality of pressure rollers 52, the thickness becomes smaller and smaller until it meets the thickness required by the rapid detection analyzer 6.

[0033] Further, such as Figure 3 , Figure 7 As shown, the cross-sectional shape of the annular pressing groove 522 is an isosceles trapezoid, and the width of the cross-sectional shape gradually increases from the inner side of the pressing roller 52 to the outer side, so that the two sides of the coal seam after roller pressing and shaping have a certain slope to prevent the side of the coal seam from collapsing, destroying the shaping and thus affecting the subsequent detection accuracy; the cross-sectional width of the annular pressing groove 522 of the multiple pressing rollers 52 in the direction from the front end to the rear end of the self-flattening bracket 53 gradually increases, and the coal seam expands to both sides after being further flattened. This structural setting reserves sufficient space for the coal seam.

[0034] Furthermore, the shaping component 9 also includes a wind shield curtain; the wind shield curtain is fixed at the bottom of the front end of the cover plate 92, and is located between the discharge port of the mixing device 2 and the material guide trough 94, to prevent the wind blown out from the discharge port of the mixing device 2 from blowing onto the shaped coal seam, causing the shape and surface flatness of the coal seam to be destroyed, thereby affecting the detection accuracy.

[0035] Further, such as Figure 1 , Figure 3 , Figure 4As shown, the belt conveyor 8 includes a shell 81, a conveying bracket 83, a belt roller 810, a conveying belt 82, a conveying motor and a scraper unit; the shell 81 is fixedly connected to the frame 1; a guide rail 88 is fixedly arranged in the shell 81; a track wheel 87 is arranged at the bottom of the conveying bracket 83; the conveying bracket 83 is movably arranged on the guide rail 88 through the track wheel 87, and the conveying bracket 83 is fixedly installed with the shell 81 by bolts. When maintenance is required, the bolts are removed and the conveying bracket 83 is pulled out of the shell 81 for easy maintenance; a plurality of belt rollers 810 are configured and rotatably installed on the conveying bracket 83; the conveying belt 82 is installed on the conveying bracket 83 through the belt rollers 810; the conveying motor is fixed on the conveying bracket 83 and is transmission-connected with the belt rollers 810. The scraper unit comprises a scraper bracket, a scraper motor 85, a scraper chain 86, a scraper sprocket 84 and a scraper 89; the scraper bracket is fixed below the conveying bracket 83; the rear end of the scraper bracket is located above the feed port of the discarded material spiral feeder 7; there are multiple scraper sprockets 84, which are rotatably mounted on the scraper bracket; the scraper chain 86 is mounted on the scraper bracket through the scraper sprocket 84; the scraper motor 85 is fixed on the scraper bracket and is transmission-connected to the scraper sprocket 84; the scraper 89 is fixed on the scraper chain 86; the coal adhered to the conveying belt 82 will fall to the bottom of the inner side of the shell 81 as the conveying belt 82 rotates, and the scraper 89 is driven to rotate by the scraper chain 86, and the coal at the bottom of the shell 81 is scraped into the discarded material spiral feeder 7 for centralized processing by the scraper 89.

[0036] Furthermore, the feeding device 3 is a crusher or a chute; the crusher or the chute is selected according to the particle size of the coal sample delivered. When the coal block particles are large, a crusher is selected to crush them first, and when the coal block particles are small, a chute is selected.

[0037] Further, such as Figure 7 As shown, rubber sleeves 521 are sleeved and fixed on both sides of the annular pressing groove 522 on the pressure roller 52; the rubber sleeve 521 is in rolling contact with the conveying belt 82; an auxiliary roller 811 is rotatably installed on the conveying bracket 83; the auxiliary roller 811 is located below the pressure roller 52 and is in rolling contact with the inner side of the conveying belt 82; the auxiliary roller 811 has no power source and rotates through rolling friction with the conveying belt 82; the pressure roller 52 is in rolling contact with the outer side of the conveying belt 82, and the auxiliary roller 811 is in rolling contact with the inner side of the conveying belt 82, and the extrusion force of the pressure roller 52 on the belt is offset by the auxiliary roller 811, so as to prevent the pressure roller 52 from directly pressing the conveying belt 82 on the conveying bracket 83, thereby preventing the conveying belt 82 from being severely worn due to excessive friction.

[0038] Further, such as Figure 3 , Figure 8As shown, the flattening assembly 5 also includes a cleaning unit 51; the cleaning unit 51 includes a cleaning bracket 513, a cleaning plate 515, a connecting plate 514, a pulling plate 511 and a tension spring 512; the cleaning bracket 513 is fixed on the flattening bracket 53; the upper end of the connecting plate 514 is hinged on the cleaning bracket 513, and the lower end is fixedly connected to the cleaning plate 515; the pulling plate 511 is fixed to one side of the connecting plate 514; one end of the tension spring 512 is fixedly connected to the pulling plate 511, and the other end is fixedly connected to the cleaning bracket 513; the cleaning plate 515 is placed in the annular pressing groove 522 and is in frictional contact with the pressing roller 52; the pulling plate 511 and the connecting plate 514 are pulled by the tension spring 512, so that the cleaning plate 515 is always in contact with the pressing roller 52, so as to scrape off the coal adhering to the pressing roller 52 to avoid mixing into the next batch of coal samples when they are tested, thereby affecting the detection accuracy.

[0039] Furthermore, a material flow detector is provided between the last two pressing rollers 52 at the rear end of the flattening bracket 53; the material flow detector is fixed on the flattening bracket 53 and is electrically connected to the control cabinet.

[0040] Furthermore, it also includes a bucket elevator; the bucket elevator is placed at the output end of the abandoned material spiral feeder 7, and is fixedly connected to the frame 1 to transport the tested coal samples.

[0041] Further, such as Figure 4 As shown, the belt conveyor 8 also includes an auxiliary roller 812; the auxiliary roller 812 is rotatably installed at the lower end of the conveying bracket 83, and is in rolling contact with the outer side of the conveying belt 82; both ends of the auxiliary roller 812 are provided with threads with opposite rotation directions, and the auxiliary roller 812 can push the conveying belt 82 to the central position when rotating, thereby playing a correction role, and at the same time can scrape off the coal sample stuck on the conveying belt 82 to avoid affecting the subsequent detection and use; the belt roller 810 is shaped like a waist drum, which plays a correction role.

[0042] When in use, the coal enters the disc feeder 4 from the feeding device 3, is continuously transported to the mixing device 2 through the disc feeder 4, is stirred and mixed by the stirring rod of the mixing device 2, and then is transported to the belt conveyor 8, is shaped and flattened by the shaping and flattening device to a shape that meets the requirements of the rapid detection analyzer 6, and then is detected and analyzed by the rapid detection analyzer 6. The analyzed coal is transported by the belt conveyor 8 to the discarded material screw feeder 7 for transportation out.

Claims

1. A modular coal quality online detection and pretreatment system, It is characterized in that The invention comprises a frame (1), a feeding device (3), a disc feeder (4), a mixing device (2), a belt conveyor (8), a shaping and flattening device, a rapid detection and analysis instrument (6), a discarded material spiral feeder (7) and a control cabinet; the feeding device (3), the disc feeder (4), the mixing device (2), the belt conveyor (8), the discarded material spiral feeder (7) and the control cabinet are fixed on the frame (1); the feeding device (3), the disc feeder (4), the mixing device (2), the belt conveyor (8), the shaping and flattening device, the rapid detection and analysis instrument (6), the discarded material spiral feeder (7) and the control cabinet are fixed on the frame (1); the feeding device (3), the disc feeder (4), the mixing device (2), the belt conveyor (8), the shaping and flattening device, the rapid detection and analysis instrument (6), the discarded material spiral feeder (7) ) is electrically connected to the control cabinet; the shaping and flattening device and the rapid detection and analysis instrument (6) are fixed on the belt conveyor (8); the discharge port of the feeding device (3) is connected to the feed port of the disc feeder (4); the discharge port of the disc feeder (4) is connected to the feed port of the mixing device (2); the belt conveyor (8) is arranged below the mixing device (2); the discharge port of the mixing device (2) is arranged toward the feed port of the shaping and flattening device; the feed port of the rapid detection and analysis instrument (6) is connected to the discharge port of the shaping and flattening device; the discarded material spiral feeder (7) is placed below the rear end of the belt conveyor (8); The shaping and flattening device comprises a shaping component (9) and a flattening component (5); the shaping component (9) comprises a shaping bracket (93), a material guide trough (94), a cover plate (92), and a material flow regulating gate (91); the shaping bracket (93) is fixed on the belt conveyor (8), and its front end is connected to the material outlet of the mixing device (2); the cover plate (92) is fixed to the upper part of the rear end of the shaping bracket (93); the material guide trough (94) is arranged below the cover plate (92) and is fixedly connected to the shaping bracket (93); the material guide trough (94) is arranged in a trumpet shape, and its width gradually shrinks from the front end of the shaping bracket (93) to the rear end; the material flow regulating gate (91) is movably mounted on the cover plate (92), and its lower end is inserted into the center of the material guide trough (94); The flattening assembly (5) comprises a flattening bracket (53), a flattening drive motor (54) and a plurality of pressure rollers (52); the flattening bracket (53) is fixed on the belt conveyor (8); the pressure roller (52) is rotatably mounted on the flattening bracket (53) and is transmission-connected to the flattening drive motor (54); the axis direction of the pressure roller (52) is perpendicular to the conveying direction of the belt conveyor (8); the plurality of pressure rollers (52) are arranged at intervals along the conveying direction of the belt conveyor (8); an annular pressure groove (522) is arranged on the pressure roller (52), and the annular pressure groove (522) is arranged corresponding to the rear end of the material guide groove (94); and the arrangement height of the plurality of pressure rollers (52) on the flattening bracket (53) gradually decreases in a direction from the front end to the rear end of the flattening bracket (53).

2. The modular coal quality online detection and pretreatment system according to claim 1, It is characterized in that The cross-sectional shape of the annular pressing groove (522) is an isosceles trapezoid, and the width of the cross-sectional shape gradually increases from the inner side of the pressing roller (52) to the outer side; the cross-sectional width of the annular pressing groove (522) of the plurality of pressing rollers (52) in the direction from the front end to the rear end of the flattening bracket (53) gradually increases.

3. A modular coal quality online detection and pretreatment system as claimed in claim 1, It is characterized in that The shaping component (9) further comprises a wind screen; the wind screen is fixed below the front end of the cover plate (92) and is located between the material outlet of the mixing device (2) and the material guide trough (94).

4. The modular coal quality online detection and pretreatment system according to any one of claims 1 to 3, It is characterized in that The belt conveyor (8) comprises a housing (81), a conveying support (83), a belt roller (810), a conveying belt (82), a conveying motor and a scraper unit; the housing (81) is fixedly connected to the frame (1); a guide rail (88) is fixedly arranged in the housing (81); a track wheel (87) is arranged at the bottom of the conveying support (83); the conveying support (83) is movably arranged on the guide rail (88) via the track wheel (87); a plurality of belt rollers (810) are provided and rotatably mounted on the conveying support (83); the conveying belt (82) is mounted on the conveying support (83) via the belt rollers (810); the conveying motor is fixed on the conveying support (83); The scraper unit comprises a scraper bracket, a scraper motor (85), a scraper chain (86), a scraper sprocket (84) and a scraper plate (89); the scraper bracket is fixed below the conveying bracket (83); the rear end of the scraper bracket is located above the feed port of the discarding spiral feeder (7); a plurality of scraper sprockets (84) are configured and rotatably mounted on the scraper bracket; the scraper chain (86) is mounted on the scraper bracket through the scraper sprocket (84); the scraper motor (85) is fixed on the scraper bracket and is in transmission connection with the scraper sprocket (84); the scraper plate (89) is fixed on the scraper chain (86).

5. A modular coal quality online detection and pretreatment system as claimed in claim 4, It is characterized in that The feeding device (3) is a crusher or a chute.

6. The modular coal quality online detection and pretreatment system according to claim 4, It is characterized in that Rubber sleeves (521) are sleeved and fixed on both sides of the annular pressing groove (522) on the pressing roller (52); the rubber sleeves (521) are in rolling contact with the conveying belt (82); an auxiliary roller (811) is rotatably mounted on the conveying bracket (83); the auxiliary roller (811) is located below the pressing roller (52) and is in rolling contact with the inner side surface of the conveying belt (82).

7. The modular coal quality online detection and pretreatment system according to claim 1, It is characterized in that The flattening assembly (5) also includes a cleaning unit (51); the cleaning unit (51) includes a cleaning bracket (513), a cleaning plate (515), a connecting plate (514), a pulling plate (511) and a tension spring (512); the cleaning bracket (513) is fixed to the flattening bracket (53); the upper end of the connecting plate (514) is hinged to the cleaning bracket (513), and the lower end is fixedly connected to the cleaning plate (515); the pulling plate (511) is fixed to one side of the connecting plate (514); one end of the tension spring (512) is fixedly connected to the pulling plate (511), and the other end is fixedly connected to the cleaning bracket (513); the cleaning plate (515) is placed in the annular pressure groove (522) and is in frictional contact with the pressure roller (52).

8. The modular coal quality online detection and pretreatment system according to claim 1, It is characterized in that A material flow detector is provided between the last two pressing rollers (52) at the rear end of the flattening bracket (53); the material flow detector is fixed on the flattening bracket (53) and is electrically connected to the control cabinet.

9. The modular coal quality online detection and pretreatment system according to claim 1, It is characterized in that It also includes a bucket elevator; the bucket elevator is placed at the output end of the discarded material spiral feeder (7) and is fixedly connected to the frame (1).

10. The modular coal quality online detection and pretreatment system according to claim 4, It is characterized in that The belt conveyor (8) further comprises an auxiliary roller (812); the auxiliary roller (812) is rotatably mounted on the lower end of the conveying bracket (83) and is in rolling contact with the outer side surface of the conveying belt (82); both ends of the auxiliary roller (812) are provided with threads with opposite rotation directions; the belt roller (810) is in the shape of a waist drum.

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