Pre-combustion furnace fuel ton bag conveying system

Abstract

The utility model relates to the field of combustion equipment, in particular to a pre-combustion furnace fuel ton bag conveying system which comprises a pre-combustion furnace, the pre-combustion furnace is fed through a feeding system, a crushing and blanking mechanism is arranged at the upper end of the feeding system, the pre-combustion furnace fuel ton bag conveying system further comprises a lifting machine, a lifting lift car is arranged on the lifting machine, and a third roller way conveying system is arranged in the lift car. A fourth roller way conveying system is arranged between the top of the elevator and the crushing and blanking mechanism; the conveying trolley is used for conveying pier bags, and a second roller way conveying system is arranged on the conveying trolley; the rail is matched with the conveying trolley, one end of the rail extends to a lift car inlet in the bottom of the elevator, and a first roller way conveying system is arranged at the other end of the rail and arranged in a plant; a transfer node is formed between every two independent conveying systems, in-place detection mechanisms are arranged on the peripheral sides of the transfer nodes, and all the in-place detection mechanisms and driving mechanisms of all the conveying systems are connected with a master controller.

Description

Technical Field

[0001] The utility model relates to the field of combustion equipment, in particular to a fuel ton bag conveying system for a pre-combustion furnace. Background Art

[0002] The decomposition furnace in thermal equipment requires reducing the carbon content of combustion, that is, reducing the usage amount of fuel: pulverized coal, and advocating the use of alternative fuels. An opening is provided on the side of the decomposition furnace to connect to a pre-combustion furnace. A stepped structure is arranged in the pre-combustion furnace, and the alternative fuel descends step by step on the steps, is fully burned, and finally enters the decomposition furnace.

[0003] The pre-combustion furnace is generally erected at a high place. Transporting fuel to the feeding system of the pre-combustion furnace often involves transporting the alternative fuel to a high position through a belt conveyor and feeding it into the pre-combustion furnace through the feeding system. The disadvantage is that a considerable part of the alternative fuel consists of garbage, and continuous transportation in an exposed environment results in a bad smell in the workplace and pollution.

[0004] The applicant has proposed CN2023229349617, a fuel conveying system for a pre-combustion furnace, in which it is proposed that the alternative fuel is sealed during transportation and the seal is broken when feeding the pre-combustion furnace, so as to reduce the exposure of the alternative fuel in the external environment and reduce pollution. During transportation, the alternative fuel is carried by a transport trolley throughout the process and lifted to the feeding port at a high place by a hoist for discharging. Subsequently, further improvements were made, and CN2023232362034 was proposed, replacing some of the transportation scenarios with roller track transportation, improving the overall transportation environment, but still not forming a complete and implementable transportation plan, so further improvement is needed. Summary of the Utility Model

[0005] To solve the above problems, the utility model provides a fuel ton bag conveying system for a pre-combustion furnace.

[0006] The purpose of the utility model is achieved in the following way: A fuel ton bag conveying system for a pre-combustion furnace includes a pre-combustion furnace 1. The pre-combustion furnace 1 is fed through a feeding system 2. A crushing and blanking mechanism 7 is arranged at the upper end of the feeding system 2. It also includes a hoist 3. A liftable car 31 is arranged on the hoist 3. A third roller track conveying system 32 is arranged in the car 31. A fourth roller track conveying system 6 is arranged between the top of the hoist 3 and the crushing and blanking mechanism 7. It also includes a transport trolley 5 for transporting ton bags 4. A second roller track conveying system 52 is arranged on the transport trolley 5.

[0007] It further includes a track 51 that cooperates with the transport trolley 5. One end of the track 51 extends to the entrance of the car 31 at the bottom of the elevator 3, and the other end of the track 51 is provided with a first roller conveyor system 81, and the first roller conveyor system 81 is arranged in the workshop 8; a transfer node is formed between every two independent conveyor systems, and a position detection mechanism is arranged on the periphery of the transfer node. All the position detection mechanisms and the drive mechanisms of all the conveyor systems are connected to the main controller.

[0008] Further, first gratings 811 are arranged on both sides of the front end of the first roller conveyor system 81, and a first position switch 511 is arranged on the track 51 in front of the front end of the first roller conveyor system 81.

[0009] Further, second gratings 521 are arranged on both sides of the front end of the second roller conveyor system 52. The second gratings 521 are fixed on both sides of the transport trolley 5. A shift lever motor 53 is fixed at the front end of the transport trolley 5. The output end of the shift lever motor 53 is fixedly connected to a shift lever 531. The shift lever 531 is located in front of the front end of the second roller conveyor system 52. With the rotation of the output end of the shift lever motor 53, the shift lever 531 is higher or lower than the bearing plane of the second roller conveyor system 52.

[0010] Further, a second position switch 512 is arranged on the track 51 behind the bottom of the elevator 3, and a deceleration switch 513 is arranged on the track 51 at a distance of 3m to 8m from the bottom of the elevator 3; third gratings 321 are arranged on both sides of the front end of the third roller conveyor system 32.

[0011] Further, the fourth roller conveyor system 6 includes a waiting section 61 that cooperates with the car 31 at the top of the elevator 3, and a continuous feeding section 62 for feeding materials to the crushing and blanking mechanism 7. The waiting section 61 and the continuous feeding section 62 operate independently, and fourth gratings 611 are arranged on both sides of the waiting section 61.

[0012] Further, the crushing and blanking mechanism 7 includes a housing 71. An opening 72 is formed on one side of the housing 71. Two crushing rollers 73 are arranged in the housing 71 at the opening 72. The rotation direction of the crushing rollers 73 is from between the two crushing rollers 73 towards the direction facing the outside of the opening 72; a transport mechanism for feeding materials towards the crushing rollers 73 is arranged outside the opening 72; an inverted hook structure 74 for preventing materials from moving away from the crushing rollers 73 is arranged on the opening 72;

[0013] Crushing teeth 731 are arranged on the crushing rollers 73. The crushing teeth 731 of the two crushing rollers 73 are arranged staggeredly, and the crushing teeth 731 form a cutting edge on one side in the rotation direction of the crushing rollers 73;

[0014] The transportation mechanism is a continuous feeding section 62, which includes a number of rollers. A friction belt 621 is provided on the continuous feeding section 62. The friction belt 621 covers the roller closest to the opening 72 and at least one roller after this roller. An anti-slip structure is provided on the friction belt 621;

[0015] The barbed structure 74 includes a mounting seat 741. The mounting seat 741 is fixedly connected to the inner wall of the opening 72. The mounting seat 741 is hinged to a swing seat 742 through a rotating shaft. One end of the swing seat 742 away from the crushing roller 73 forms a hinge point. A torsion spring 743 is sleeved outside the rotating shaft. The torsion spring 743 provides a force to swing the swing seat 742 outwards. The swing seat 742 is fixedly connected to a blade 744. A cutting edge is formed on the side of the blade 744 away from the crushing roller 73, and the side of the blade 744 close to the crushing roller 73 is a blunt end.

[0016] Compared with the prior art, the utility model improves the overall design of the trolley transportation, elevator, workshop and related roller conveyor systems, forms a complete ton bag transportation system, and sets corresponding in-place detection mechanisms, so that most of the work in the whole process can be basically completed without manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the overall kiln building;

[0018] Figure 2 It is based on Figure 1 The cross-sectional view;

[0019] Figure 3 It is an enlarged view of the trolley transportation part;

[0020] Figure 4 It is a schematic structural diagram of the first roller conveyor system in the workshop;

[0021] Figure 5 It is a schematic structural diagram of the transport trolley in the transportation state;

[0022] Figure 6 It is a schematic structural diagram of the transport trolley to the car, where the car is in a sectional state;

[0023] Figure 7 It is a schematic structural diagram of the car to the crushing and blanking mechanism, where the car is in a sectional state;

[0024] Figure 8 It is a schematic structural diagram of the crushing and blanking mechanism;

[0025] Figure 9 It is an enlarged view of the opening of the crushing and blanking mechanism;

[0026] Figure 10 It is an enlarged view of the barbed structure.

[0027] Among them, there are a pre-combustion furnace 1, a feeding system 2, a hoist 3, a car 31, a third roller conveyor system 32, a third grating 321, and a ton bag 4;

[0028] A transport trolley 5, a track 51, a first in-place switch 511, a second in-place switch 512, a deceleration switch 513, a second roller conveyor system 52, a second grating 521, a retaining rod motor 53, and a retaining rod 531;

[0029] A fourth roller conveyor system 6, a waiting section 61, a fourth grating 611, a continuous feeding section 62, and a friction belt 621;

[0030] A crushing and blanking mechanism 7, a housing 71, an opening 72, a crushing roller 73, crushing teeth 731, a barb structure 74, a mounting seat 741, a swing seat 742, a torsion spring 743, and a blade 744

[0031] A factory building 8, a first roller conveyor system 81, and a first grating 811. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] In the present invention, unless otherwise clearly defined and limited, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention.

[0034] As shown in the attached Figures 1-7As shown in the figure, a bulk bag transportation system for a pre-combustion furnace fuel includes a pre-combustion furnace 1. The pre-combustion furnace 1 is fed through a feeding system 2. At the upper end of the feeding system 2, there is a crushing and blanking mechanism 7. The crushing and blanking mechanism 7 can be a double-roll or multi-roll crusher in the prior art, but preferably the special crushing and blanking mechanism 7 described in this application hereinafter. It also includes a hoist 3. On the hoist 3, there is a liftable car 31. The hoist 3 and the car 31 are in the prior art and will not be elaborated here. Inside the car 31, there is a third roller conveyor system 32. Between the top of the hoist 3 and the crushing and blanking mechanism 7, there is a fourth roller conveyor system 6. It also includes a transport cart 5 for transporting bulk bags 4. On the transport cart 5, there is a second roller conveyor system 52. The roller conveyor system is in the prior art and preferably includes a frame for fixing. A plurality of rollers are arrayed on the frame. The rollers are rotatably connected to the frame. One end of the roller is fixed with a driven sprocket. The frame is fixedly connected to a motor. The output end of the motor is connected to the input end of a speed reducer. The output end of the speed reducer is fixedly connected to a driving sprocket. The driving sprocket and the driven sprocket are connected in series through a chain, so as to drive the rollers to rotate through the motor. It can also be other roller track structures in the prior art. The structure of the above transportation system is detailed in CN2023229349617 and CN2023232362034.

[0035] As shown in the attached Figures 1-3 figure, it also includes a track 51 that cooperates with the transport cart 5. One end of the track 51 extends to the entrance of the car 31 at the bottom of the hoist 3. The other end of the track 51 is provided with a first roller conveyor system 81. The first roller conveyor system 81 is arranged in a workshop 8. Since the bulk bag 4 contains flammable alternative fuel, after the bulk bag 4 is packed, it is first transported to the workshop 8 for storage. There is an entrance at the back of the workshop 8 for transporting the bulk bag 4 in. There is an exit at the front of the workshop 8 for the track 51 to pass through. The walls and the top of the workshop 8 are preferably in a closed state. The window part is provided with semi-transparent light-shielding glass. A traveling crane or a small crane for lifting the bulk bag 4 is built in the workshop 8, which is used to transfer the stored bulk bag 4 to the end of the first roller conveyor system 81. A transfer node is formed between every two independent conveyor systems. A position detection mechanism is arranged on the periphery of the transfer node. All the position detection mechanisms and the driving mechanisms of all the conveyor systems are communicatively connected to a master controller, which can be a wired connection. However, considering the too large overall volume, a wireless connection is preferably used.

[0036] The position detection mechanism includes the following:

[0037] As shown in the attached Figure 4 figure, on both sides of the front end of the first roller conveyor system 81, there are first light grids 811. On the track 51 in front of the front end of the first roller conveyor system 81, there is a first position switch 511.

[0038] As shown in the attached Figure 5As shown in the figure, second gratings 521 are arranged on both sides at the front end of the second roller conveyor system 52. The second gratings 521 are fixed to both sides of the transport trolley 5. A stop bar motor 53 is fixed to the front end of the transport trolley 5. The output end of the stop bar motor 53 is fixedly connected to a stop bar 531. The stop bar 531 is located in front of the front end of the second roller conveyor system 52. With the rotation of the output end of the stop bar motor 53, the stop bar 531 is higher or lower than the bearing plane of the second roller conveyor system 52. The stop bar 531 is used to prevent the ton bag 4 from sliding forward out of the transport trolley 5 due to inertia when the transport trolley 5 decelerates during transportation. Preferably, a stop bar motor 53 and a stop bar 531 are also arranged at the rear of the transport trolley 5.

[0039] As shown in the attached Figure 6 As shown in the figure, a second in-place switch 512 is arranged on the track 51 behind the bottom of the elevator 3, and a deceleration switch 513 is arranged on the track 51 at a distance of 3m to 8m from the bottom of the elevator 3; third gratings 321 are arranged on both sides at the front end of the third roller conveyor system 32; when the transport trolley 5 goes to the first roller conveyor system 81, it is in an empty state, so only the first in-place switch 511 is arranged. After the transport trolley 5 arrives, it stops and brakes. However, when the transport trolley 5 goes to the elevator 3, it carries a ton bag 4 weighing about 1 ton and outputs more power at the same time. It needs to brake and decelerate in advance. Therefore, a deceleration switch 513 is arranged at a distance of 3m to 8m from the bottom of the elevator 3. When the deceleration switch 513 detects the transport trolley 5, the total controller issues a brake and deceleration command, and the transport trolley 5 stops at the position of the second in-place switch 512.

[0040] As shown in the attached Figure 7 As shown in the figure, the fourth roller conveyor system 6 includes a waiting section 61 that cooperates with the car 31 at the top of the elevator 3, and a continuous feeding section 62 for feeding materials to the crushing and blanking mechanism 7. The waiting section 61 and the continuous feeding section 62 operate independently. Operating independently means that they are respectively driven by two sets of drive motors and the supporting chain drives. The continuous feeding section 62 and the waiting section 61 are connected end to end but have no driving relationship. Fourth gratings 611 are arranged on both sides of the waiting section 61.

[0041] Regarding the ton bag crushing and blanking mechanism 7, in the records of CN2023229349617 and CN2023232362034, a double-roller or multi-roller crusher in the prior art is used. The disadvantage is that the entire ton bag 4 and the fuel therein directly all fall into the lower feeding system 2, resulting in material stacking and jamming. Further, it may also cause hot air to return from the pre-combustion furnace 1 to the feeding system 2 and accumulate in the feeding system 2, posing a risk of fuel combustion in the feeding system 2. Therefore, an improvement is made to change the blanking of the crushing and blanking mechanism 7 from a one-time process to a continuous process.

[0042] As shown in the attached Figures 7-10As shown in the figure, a fuel ton bag crushing and feeding mechanism for a pre-combustion furnace includes a housing 71. An opening 72 is formed on one side of the housing 71. Two crushing rollers 73 are arranged inside the housing 71 at the opening 72. The rotation direction of the crushing rollers 73 is from between the two crushing rollers 73 towards the direction outside the opening 72, that is, pushing outwards from the middle. A transportation mechanism for feeding towards the crushing rollers 73 is arranged outside the opening 72. A barb structure 74 for preventing materials from moving away from the crushing rollers 73 is arranged on the opening 72.

[0043] Make the continuous feeding section 62 operate continuously. When there is no ton bag 4 on the continuous feeding section 62, the waiting section 61 operates to move the ton bag 4 to the continuous feeding section 62. The continuous feeding section 62 continuously provides a force to push the ton bag 4 towards the crushing rollers 73. The crushing rollers 73 break the surface of the ton bag 4 and provide a force to push the ton bag 4 outwards. The barb structure 74 cuts the surface of the ton bag 4 when the ton bag 4 enters, and catches the ton bag 4 when the crushing rollers 73 push the ton bag 4 outwards. The ton bag 4 continuously leaks materials to the feeding system 2 through the surface break until there is little remaining material, and then completely falls into the feeding system 2 as it is broken by the crushing rollers 73.

[0044] Furthermore, crushing teeth 731 are arranged on the crushing rollers 73. The crushing teeth 731 of the two crushing rollers 73 are arranged staggeredly. The crushing teeth 731 form a cutting edge on one side in the rotation direction of the crushing rollers 73, preferably in the shape of a crescent knife as shown in the figure.

[0045] The transportation mechanism is the continuous feeding section 62. The continuous feeding section 62 includes a number of rollers. A friction belt 621 is arranged on the continuous feeding section 62. The friction belt 621 covers the roller closest to the opening 72 and at least one roller after this roller. Anti-slip structures are arranged on the friction belt 621. The anti-slip structures can be that the surface of the friction belt 621 itself is rough, or there are multiple horizontal linear anti-slip patterns or wavy anti-slip patterns or other shaped anti-slip patterns arranged on the surface of the friction belt 621 along the transportation direction.

[0046] Furthermore, as shown in the appendix Figure 10 As shown in the figure, the barb structure 74 includes a mounting seat 741. The mounting seat 741 is fixedly connected to the inner wall of the opening 72. The mounting seat 741 is hinged to a swing seat 742 through a rotating shaft. An articulation point is formed at one end of the swing seat 742 away from the crushing rollers 73. A torsion spring 743 is sleeved outside the rotating shaft. The torsion spring 743 provides a force to swing the swing seat 742 outwards. The swing seat 742 is fixedly connected to a blade 744. A cutting edge is formed on one side of the blade 744 away from the crushing rollers 73. The side of the blade 744 close to the crushing rollers 73 is a blunt end, so that the surface of the ton bag 4 is cut when the ton bag 4 enters, and a hook is formed to catch the ton bag 4 when the ton bag 4 is subjected to an outward force.

[0047] Preferably, fixed blades 744 are arranged at the bottom of the inner wall of the opening 72, preferably two, arranged on both sides respectively, which also play a role of hooking.

[0048] Further, it further includes a driving motor. The output end of the driving motor is fixedly connected to a driving sprocket, and the driving sprocket is engaged with a chain. One end of a crushing roller 73 passes through the side wall of the housing 71 and is fixedly connected to a driven sprocket, and the driven sprocket is engaged with the chain. The other end of the crushing roller 73 passes through the side wall of the housing 71 and is fixedly connected to a first gear, and the end of the other crushing roller 73 passes through the side wall of the housing 71 and is fixedly connected to a second gear, and the first gear is meshed with the second gear.

[0049] The method for transporting and crushing bulk bags, and the method is as follows:

[0050] S1. Fuel is packed into the bulk bag 4, and the bulk bag 4 is transported to the factory building 8 for storage.

[0051] S2. The bulk bag 4 in the factory building 8 is transferred to the rear end of the first roller conveyor system 81 and transported to the front end along with the first roller conveyor system 81. After the first grating 811 detects the bulk bag 4, it sends an instruction to the total controller to stop the first roller conveyor system 81.

[0052] S3. The transport trolley 5 moves towards the first roller conveyor system 81 through the track 51. After the first in-place switch 511 detects that the transport trolley 5 is in place, it sends an instruction to the total controller to stop the transport trolley 5. The second roller conveyor system 52 on the transport trolley 5 abuts against the first roller conveyor system 81.

[0053] S4. The first roller conveyor system 81 and the second roller conveyor system 52 run synchronously to move the bulk bag 4 onto the second roller conveyor system 52. The lever motor 53 runs synchronously to raise the lever 531 to form a limit. After the second grating 521 detects the bulk bag 4, the second roller conveyor system 52 stops running, and the transport trolley 5 runs and moves towards the hoist 3; the first roller conveyor system 81 executes S2.

[0054] S5. After the deceleration switch 513 detects the transport trolley 5, the transport trolley 5 decelerates. After the second in-place switch 512 detects that the transport trolley 5 is in place, the transport trolley 5 stops running, and the lever motor 53 runs to lower the lever 531.

[0055] S6. The second roller conveyor system 52 and the third roller conveyor system 32 run synchronously to move the bulk bag 4 onto the third roller conveyor system 32. After the third grating 321 detects the bulk bag 4, the second roller conveyor system 52 and the third roller conveyor system 32 stop running, the car 31 closes the door and moves upward through the hoist 3, and the transport trolley 5 executes S3.

[0056] S7. The car 31 is lifted to the corresponding height of the fourth roller conveyor system 6. The car 31 opens its door. The third roller conveyor system 32 and the fourth roller conveyor system 6 operate synchronously to move the bulk bag 4 to the waiting section 61. After the fourth grating 611 detects the bulk bag 4, the third roller conveyor system 32 and the fourth roller conveyor system 6 stop operating. The car 31 closes its door and moves downward through the hoist 3. The bulk bag 4 remains in the waiting section 61;

[0057] S8. The continuous feeding section 62 operates continuously. When there is no bulk bag 4 on the continuous feeding section 62, the waiting section 61 operates to move the bulk bag 4 to the continuous feeding section 62. The continuous feeding section 62 continuously provides a force to push the bulk bag 4 towards the crushing roller 73. The crushing roller 73 breaks the surface of the bulk bag 4 and provides a force to push the bulk bag 4 outwards. The barb structure 74 cuts the surface of the bulk bag 4 when the bulk bag 4 enters, and catches the bulk bag 4 when the crushing roller 73 pushes the bulk bag 4 outwards. The bulk bag 4 continuously leaks materials to the feeding system 2 through the surface break until there is little remaining material, and then completely falls into the feeding system 2 as it is broken by the crushing roller 73.

[0058] The above are only the preferred embodiments of the present invention. It should be noted that for those skilled in the art, without departing from the overall concept of the present invention, several changes and improvements can still be made, and these should also be regarded as the protection scope of the present invention.

Claims

1. A pre-combustion furnace fuel ton bag conveying system, comprising a pre-combustion furnace (1), the pre-combustion furnace (1) is fed by a feeding system (2), a crushing and dropping mechanism (7) is arranged at the upper end of the feeding system (2), and also comprises an elevator (3), a liftable car (31) is arranged on the elevator (3), a third roller conveying system (32) is arranged in the car (31), and a fourth roller conveying system (6) is arranged between the top of the elevator (3) and the crushing and dropping mechanism (7); and also comprises a transport trolley (5) for transporting ton bags (4), and a second roller conveying system (52) is arranged on the transport trolley (5); Features: It also includes a track (51) that cooperates with the transport trolley (5), one end of the track (51) extends to the entrance of the car (31) at the bottom of the elevator (3), and the other end of the track (51) is provided with a first roller conveyor system (81), and the first roller conveyor system (81) is arranged in the factory building (8); a transfer node is formed between every two independent conveyor systems, and an in-place detection mechanism is arranged around the transfer node, and all in-place detection mechanisms and the driving mechanisms of all conveyor systems are connected to the main controller.

2. A pre-combustion furnace fuel ton bag conveying system as claimed in claim 1, characterized in that: First gratings (811) are arranged on both sides of the front end of the first roller conveying system (81), and a first in-position switch (511) is arranged on the track (51) in front of the front end of the first roller conveying system (81).

3. A pre-combustion furnace fuel ton bag conveying system as claimed in claim 1, characterized in that: Second gratings (521) are arranged on both sides of the front end of the second roller conveyor system (52). The second gratings (521) are fixed to both sides of the transport trolley (5). A gear lever motor (53) is fixed to the front end of the transport trolley (5). The output end of the gear lever motor (53) is fixedly connected to a gear lever (531). The gear lever (531) is located in front of the front end of the second roller conveyor system (52). As the output end of the gear lever motor (53) rotates, the gear lever (531) is higher or lower than the bearing plane of the second roller conveyor system (52).

4. A pre-combustion furnace fuel ton bag conveying system as claimed in claim 1, characterized in that: A second in-position switch (512) is provided on the track (51) at the rear of the bottom of the elevator (3), and a deceleration switch (513) is provided on the track (51) at a distance of 3m to 8m from the bottom of the elevator (3); and third gratings (321) are provided on both sides of the front end of the third roller conveyor system (32).

5. A pre-combustion furnace fuel ton bag conveying system as claimed in claim 1, characterized in that: The fourth roller conveying system (6) comprises a waiting section (61) matched with a car (31) at the top of the hoist (3), and a continuous feeding section (62) for feeding materials to the crushing and dropping mechanism (7); the waiting section (61) and the continuous feeding section (62) respectively operate independently, and fourth gratings (611) are arranged on both sides of the waiting section (61).

6. A pre-combustion furnace fuel ton bag conveying system as claimed in claim 5, characterized in that: The crushing and dropping mechanism (7) comprises a shell (71), an opening (72) is formed on one side of the shell (71), two crushing rollers (73) are arranged in the shell (71) at the opening (72), and the crushing rollers (73) rotate in a direction from between the two crushing rollers (73) to the opening (72) and toward the outside; a transport mechanism for feeding materials in the direction of the crushing rollers (73) is arranged outside the opening (72); and a barb structure (74) is arranged on the opening (72) to prevent materials from moving away from the crushing rollers (73); The crushing roller (73) is provided with crushing teeth (731), the crushing teeth (731) of the two crushing rollers (73) are arranged alternately, and the crushing teeth (731) form a cutting edge on one side of the crushing roller (73) in the rotation direction; The transport mechanism is a continuous feeding section (62), the continuous feeding section (62) comprises a plurality of rollers, a friction belt (621) is arranged on the continuous feeding section (62), the friction belt (621) covers the roller closest to the opening (72) and at least one roller behind the roller, and an anti-slip structure is arranged on the friction belt (621); The barb structure (74) comprises a mounting seat (741), wherein the mounting seat (741) is fixedly connected to the inner wall of the opening (72), the mounting seat (741) is hingedly connected to the swing seat (742) via a rotating shaft, an end of the swing seat (742) away from the crushing roller (73) forms a hinge point, a torsion spring (743) is disposed outside the rotating shaft, the torsion spring (743) provides a force to swing the swing seat (742) outward, the swing seat (742) is fixedly connected to a blade (744), a side of the blade (744) away from the crushing roller (73) forms a cutting edge, and a side of the blade (744) close to the crushing roller (73) is a blunt end.

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