Over-temperature circulation prevention device for coal in coal silo

Abstract

The invention provides a coal silo coal anti-overtemperature circulation device which comprises a coal silo, the coal silo is provided with a discharging unit, and the coal silo coal anti-overtemperature circulation device comprises a two-way conveying device connected with the discharging unit and used for collecting and conveying materials discharged by the discharging unit; the material guide funnel is arranged at the top of the coal silo and comprises a material outlet corresponding to the coal silo; the material guiding pipeline is connected with one end of the two-way conveying device, the other end of the two-way conveying device is connected with the material guiding hopper, and the material guiding pipeline is used for conveying materials to the material guiding hopper. By means of the mode, circulating heat dissipation can be conducted on coal stored in the bin body, heat dissipation of the coal is facilitated through coal circulation, and therefore the effect of preventing the coal from being overheated can be achieved.

Description

Technical Field

[0001] This invention relates to the field of coal storage technology, and in particular to a coal silo overheat protection and circulation device. Background Technology

[0002] Currently, coal silos are a common method of coal storage. During the coal storage process, high temperature is a common and very dangerous problem. High temperature not only leads to a decline in coal quality and loss of calorific value, but may also cause spontaneous combustion or even explosion. Therefore, preventing high temperature during coal storage is particularly important.

[0003] Currently, common methods for preventing high temperatures in coal storage involve two paths: source control and storage management. Source control mainly focuses on two aspects: coal particle size distribution and moisture control. Particle size distribution involves mixing large and small coal particles to ensure that the large and small coal particles are evenly distributed during storage, thereby improving the permeability of the coal and utilizing heat dissipation. Moisture control can reduce oxidation reactions and reduce heat generation.

[0004] The common methods for warehouse management are to dissipate accumulated heat by reserving pipes inside the coal bunker and using forced ventilation, or by injecting nitrogen to reduce the oxidation rate of stored coal.

[0005] While the above methods can alleviate the problem of high temperature in coal storage silos, there are still some issues. On the one hand, it is necessary to pre-install appropriate ventilation facilities and other structures on the coal silos. On the other hand, the preventive effect is limited and the heat dissipation is not thorough enough. Summary of the Invention

[0006] The purpose of this invention is to solve the above-mentioned problems by providing a coal silo overheat protection circulation device that can be applied to address the high temperature problem of coal in coal storage silos.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: a coal silo overheat protection and circulation device, comprising a coal silo, the coal silo being equipped with a discharge unit, and further comprising: A bidirectional conveying device, connected to the discharge unit, is used to collect and convey the material discharged from the discharge unit. A feed hopper is installed at the top of the coal silo, including a discharge port corresponding to the coal silo; The material guide pipe is connected to one end of the bidirectional conveying device and the other end is connected to the material guide funnel, and is used to transport materials to the material guide funnel.

[0008] Furthermore, the feeding funnel includes a funnel body and two discharge ports. A tilting plate is provided inside the funnel body, and the tilting plate can be tilted to block either discharge port.

[0009] Furthermore, the tilting plate is driven by a drive shaft, and two discharge ports are located on both sides of the drive shaft. Inclined plates are provided extending downward from the drive shaft to the two discharge ports, and multiple guide plates are provided on the inclined plates.

[0010] Furthermore, the material guide pipe is connected to a hopper, and the hopper is connected to a bidirectional conveying device.

[0011] Furthermore, the bidirectional conveying device is a bidirectional conveyor belt.

[0012] Furthermore, a flow guide pipe is coaxially arranged around the feed pipe. The upper end of the flow guide pipe is open, and the lower end is connected to multiple air collecting pipes. Multiple through holes are evenly distributed on the side wall of the air collecting pipe that extends into the hopper.

[0013] Furthermore, the plurality of gas collecting pipes are evenly spaced apart, and the through holes are located at a different point from the top of the gas collecting pipes.

[0014] Furthermore, the discharge unit includes a second conveying unit disposed at the bottom of the silo and a first conveying unit connected to one end of the first conveying unit, the other end of the first conveying unit being connected to a bidirectional conveying device.

[0015] Furthermore, the silo body includes two silos spaced apart along the conveying direction of the bidirectional conveying device, and the hopper and the guide pipe are both located on the same side of the two silos.

[0016] Furthermore, bidirectional conveying devices are connected to both sides of the hopper, each bidirectional conveying device corresponding to two bins, and the upper end of the guide pipe is connected to two discharge pipes.

[0017] The coal silo overheat protection and circulation device disclosed in this invention has the following advantages compared with the prior art: it includes a coal silo, and the coal silo is equipped with a discharge unit, including: A bidirectional conveying device, connected to the discharge unit, is used to collect and convey the material discharged from the discharge unit; a guide funnel, located at the top of the coal silo, includes a discharge port corresponding to the coal silo; a guide pipe, connected to one end of the bidirectional conveying device and the other end to the guide funnel, is used to convey the material to the guide funnel. Through the above method, the coal stored in the silo can be circulated and cooled. Through coal circulation, the heat of the coal can be dissipated, thus achieving the effect of preventing coal overheating. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a coal silo overheat protection circulation device according to Embodiment 1 of the present invention. Figure 1 .

[0019] Figure 2This is a side view of a first embodiment of the coal overheating prevention and circulation device for coal silos according to the present invention.

[0020] Figure 3 This is a schematic diagram of the overall structure of a coal silo overheat protection circulation device according to Embodiment 1 of the present invention. Figure 2 .

[0021] Figure 4 This is a bottom view of a first embodiment of the coal overheating prevention and circulation device for coal silos according to the present invention.

[0022] Figure 5 for Figure 4 The diagram shown is a partially enlarged structural schematic of point A in a coal silo overheat protection circulation device of the present invention.

[0023] Figure 6 This is a schematic diagram of the material guiding funnel in a coal silo overheat prevention and circulation device according to the present invention. Figure 1 .

[0024] Figure 7 This is a schematic diagram of the material guiding funnel in a coal silo overheat prevention and circulation device according to the present invention. Figure 2 .

[0025] Figure 8 This is a cross-sectional view of the material guide funnel in a coal silo overheat protection circulation device according to the present invention.

[0026] Figure 9 This is a schematic diagram of the material guiding pipe in a coal silo overheat protection circulation device according to the present invention.

[0027] Figure 10 for Figure 9 The diagram shown is a partially enlarged structural schematic of point B in a coal silo overheat protection circulation device of the present invention.

[0028] Figure 11 This is a cross-sectional view of the feed tube in this invention.

[0029] Figure 12 This is a schematic diagram of the structure of the first and second conveying units in a coal silo overheat protection and circulation device according to the present invention. Figure 1 .

[0030] Figure 13 This is a schematic diagram of the structure of the first conveying unit and the second conveying unit in this invention. Figure 2 .

[0031] Figure 14 This is a schematic diagram of the overall structure of a second embodiment of the coal overheating prevention and circulation device for coal silos according to the present invention.

[0032] In the diagram: 1. Bin body; 10. First conveying unit; 101. Material outlet; 12. Second conveying unit; 120. Connecting channel; 121. Outer cylinder; 122. First auger; 13. Feed inlet; 2. Guide funnel; 20. Tilting plate; 201. Insert sleeve; 21. Discharge port; 210. Inclined plate; 211. Guide plate; 22. Drive shaft; 23. Bucket body; 24. Drive motor; 3. Bidirectional conveying device; 4. Guide pipe; 40. Port; 41. Connecting pipe; 42. Air collecting pipe; 5. Guide pipe; 51. Hopper; 52. Discharge pipe; 53. Second auger. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner, and therefore only show the components relevant to the invention.

[0034] Example 1 Please refer to Figure 1-3 As a specific implementation, the present invention provides a coal silo coal overheating prevention and circulation device, which includes a coal silo, the coal silo being equipped with a discharge unit, and further includes: The bidirectional conveying device 3 is connected to the discharge unit and is used to collect and convey the material discharged from the discharge unit. The material guide hopper 2 is located at the top of the coal silo and includes a discharge port 21 corresponding to the coal silo. Five feed pipes are connected to one end of the bidirectional conveying device 3 and the other end is connected to the feed funnel 2, which are used to convey materials to the feed funnel 2.

[0035] Specifically, as one embodiment, the specific structure of the coal silo overheat protection circulation device provided in this application includes two coal silos spaced apart. The top of the coal silo has an inlet 13, and the bottom has a conical structure to facilitate material discharge. A discharge unit is configured at the bottom, and the discharge unit is connected to a bidirectional conveying device 3. The bidirectional conveying device 3 can convey material in two directions and can be any type of commonly used auger conveyor or conveyor belt. A guide pipe 5 is connected to one end of the bidirectional conveying device 3. The lower end of the guide pipe 5 is connected to the bidirectional conveying device, and the upper end is connected to a discharge pipe 52, enabling the material to be conveyed from the bottom to the top of the silo body 1. (See reference...) Figures 1-13In one specific implementation, a guide funnel 2 is provided at the top of the two silos 1, and two discharge ports 21 corresponding to the feed inlet 13 at the top of the silos 1 are provided below the guide funnel 2. The guide funnel 2 can switch one of the two discharge ports 21 to open. This application uses a group configuration of silos 1, so that coal can be stored in the two silos 1 in conjunction. During coal storage, coal is stored in both silos 1 according to the storage requirements. For ease of description, the two silos 1 are referred to as silo 1-1 and silo 1-2. When using coal, the coal in silo 1-1 is first discharged. At this time, the bidirectional conveying device 3 conveys the coal away from the guide pipe 5, and the coal blocks are conveyed to the coal use conveying channel. When a portion of the coal stored in silo 1-1 is used and there is no demand for coal, if the temperature of the coal stored in silo 1-2 rises, then... At this time, the coal stored in bin 1 can be discharged, and the bidirectional conveying device 3 will transport it in the direction of the guide pipe 5. At this time, the coal stored in bin 1 can be transported from bottom to top into bin 1 and introduced into the top of bin 1 through the guide funnel 2. The coal can dissipate some heat as it is transported by the bidirectional conveying device and the guide pipe 5. When the coal is introduced into bin 1 through the guide funnel 2, the coal at the bottom of bin 1 is close to the side wall of the bin, which has good thermal conductivity and ventilation, so the temperature is low. At this time, the low-temperature coal falls into the lower layer of bin 1, while the higher-temperature coal near the middle area of ​​bin 1 is transported into bin 1 and is in the upper layer of bin 1. This is conducive to heat dissipation. Through coal circulation, the heat of the coal is dissipated, thus achieving the effect of preventing coal overheating.

[0036] Furthermore, when the coal stored in silo 1 is used up and there is no need for coal, the coal stored in silo 12 can be transported to silo 11, and new coal can be added to silo 11 at the same time. The new coal has a low temperature, and when mixed with the high-temperature coal in the silo, the temperature can be further reduced, which can achieve a better overheating prevention effect.

[0037] Furthermore, as a specific implementation method, refer to Figures 6-8 The specific structure of the material guiding funnel 2 is as follows: the material guiding funnel 2 includes a funnel body 23 and two discharge ports 21. A flip plate 20 is provided inside the funnel body 23. The flip plate 20 can flip to block either discharge port 21.

[0038] Specifically, the material guiding funnel 2 includes a funnel body 23, with two discharge ports 21 at the lower end of the funnel body 23. The two discharge ports 21 correspond one-to-one with the bin 1 below. It also includes a tilting plate 20, with a plug-in sleeve 201 at the lower end of the tilting plate 20. A drive shaft 22 is rotatably mounted on the side wall of the funnel body 23. The drive shaft 22 is located in the area where the two discharge ports 21 intersect. The drive shaft 22 is plugged into the plug-in sleeve 201. The drive shaft 22 is connected to a drive motor 24. The drive motor 24 can drive the drive shaft 22 to rotate around its axis. The drive shaft 22 drives the swing plate to swing, thereby controlling the swing direction of the swing plate to block one of the discharge ports 21. This controls the material passing through the material guiding funnel 2 to leak through the predetermined discharge port 21 and enter the corresponding bin 1.

[0039] Furthermore, as a specific implementation method, refer to Figure 7 , Figure 8 The flip plate 20 is driven by a drive shaft 22, and two discharge ports 21 are located on both sides of the drive shaft 22. Inclined plates 210 are provided extending downward from the drive shaft 22 to the two discharge ports 21, and multiple guide plates 211 are provided on the inclined plates 210.

[0040] Specifically, by setting the inclined plate 210, a flow guiding effect can be achieved, see reference. Figure 3 The outlet pipe 52 connected to the guide pipe 5 is set downward. When in use, the outlet pipe 52 corresponds exactly to the area where the two inclined plates 210 intersect. When the material falls from the outlet pipe 52, it is guided to the outlet 21 through the inclined plates 210, which increases the flow distance of the material, thereby enabling better heat exchange and achieving better heat dissipation.

[0041] It is understandable that the material flowing out of the discharge pipe 52 accumulates and falls, and when it falls onto the guide plate 211, the material is not easily dispersed. (Refer to...) Figures 6-8 The inclined plate 210 is also equipped with a guide plate 211, with the upper end of the guide plate 211 corresponding to the outlet of the discharge pipe 52. By setting the guide plate 211, the falling material can be guided to the edge of the guide plate 211, thereby improving the dispersion effect of the material. On the one hand, it is conducive to heat dissipation of the material, and on the other hand, it is conducive to the uniform distribution of the material in the bin 1. It is also conducive to the uniform distribution of the material in the bin 1, relieving the compactness of the coal storage in the bin 1, improving the air permeability of the coal storage, facilitating the heat dissipation of the coal storage, and alleviating the overheating phenomenon of the coal storage. When the coal stored in bin 12 is transported to bin 11, and new coal is added to bin 11 at the same time, the setting of the guide plate 211 and the inclined plate 210 is conducive to the uniform mixing of the stored coal and the new coal.

[0042] Furthermore, as a specific implementation method, refer to Figure 9 - Figure 11The feed pipe 5 is connected to the hopper 51, and the hopper 51 is connected to the bidirectional conveying device 3.

[0043] Specifically, as one implementation method, the feed pipe 5 is the outer pipe of the auger device, and an auger is installed inside. The auger device lifts the coal from the bottom of the bin 1 to a higher position. The overall structure is compact and occupies a small area. The lower end of the feed pipe 5 is connected to the hopper 51. The bidirectional conveying device 3 uses a transmission belt. The hopper 51 is located below the transmission belt. The material conveyed by the transmission belt can fall into the hopper 51 and be collected. A second auger 53 is installed in the hopper 51, which can push the material to one end of the feed pipe 5 and then transport the material through the feed pipe 5. By setting the hopper 51, when the coal enters the hopper 51 and is turned over by the second auger 53, it is beneficial to dissipate the heat inside the coal, thereby achieving a better heat dissipation effect.

[0044] Furthermore, as a specific implementation, the bidirectional conveying device 3 is a bidirectional conveyor belt. Specifically, a conveyor belt is used to convey materials. The conveyor belt is open, which allows for better heat dissipation when the coal is conveyed on the surface of the conveyor belt. Moreover, when the coal falls from the conveyor belt into the hopper 51, it is scattered, resulting in even better heat dissipation.

[0045] Furthermore, as a preferred embodiment, refer to Figure 9 - Figure 11 A guide pipe 4 is coaxially arranged around the material guide pipe 5. The upper end of the guide pipe 4 is open, and the lower end is connected to multiple gas collecting pipes 42. Multiple through holes are evenly distributed on the side wall of the gas collecting pipe 42 that extends into the hopper 51.

[0046] Specifically, as one implementation method, the guide pipe 5 is the outer cylinder 121 of the auger conveyor, which is made of metal and has good thermal conductivity. In this application, a guide pipe 4 is coaxially arranged around the guide pipe 5. The upper end port 40 of the guide pipe 4 is open, and the lower end is connected to the gas collecting pipe 42. The gas collecting pipe 42 is set inside the hopper 51. Through this arrangement, the guide pipe 4 can form a chimney effect and provide a suction effect to the gas collecting pipe 42. The gas collecting pipe 42 is set inside the hopper 51 and can draw the airflow inside the hopper 51. When the stored coal is conveyed into the hopper 51, the airflow inside the hopper 51 is drawn by the gas collecting pipe 42, which is conducive to the flow of low-temperature airflow around the hopper 51 into the hopper 51, thereby facilitating the heat dissipation of the stored coal. Moreover, through the negative pressure suction effect, the gas around the hopper 51 can flow into the hopper 51, forming a flowing airflow, thereby reducing the diffusion of coal powder inside the hopper 51 and achieving good environmental protection.

[0047] refer to Figure 9 , Figure 10The lower end of the guide pipe 4 is closed and connected to the air inlet pipe through the connecting pipe 41. The air collecting pipe 42 is welded to the side wall of the hopper 51.

[0048] Furthermore, the plurality of gas collecting pipes 42 are evenly spaced, and the through holes are located at locations other than the top of the gas collecting pipes 42. For details, please refer to [link / reference needed]. Figure 9 , Figure 10 The gas collecting pipe 42 includes multiple pipes, evenly spaced apart, forming a flow gap between them. When the coal is transported to the hopper 51 by the bidirectional conveying device, it can fall through the flow gap between the gas collecting pipes 42, thus diverting the coal. When passing through the gas collecting pipe 42, the coal can exchange heat with the airflow that enters the gas collecting pipe 42 from the outside through the through hole. The through hole is located in the area of ​​the gas collecting pipe 42 that is different from the top of the gas collecting pipe 42, which can reduce the effect of small coal particles clogging the through hole. In this way, the heat exchange effect is better.

[0049] Furthermore, by setting up a flow guide channel, when the airflow flows between the flow guide channel and the outer wall of the feed pipe 5, it is also beneficial to heat exchange in the feed pipe 5, thereby achieving the effect of heat exchange in the coal inside the heat pipe.

[0050] Furthermore, as a specific implementation method, refer to Figure 12 , Figure 13 The specific structure of the discharge unit is as follows: the discharge unit includes a second conveying unit 12 disposed at the bottom of the silo 1 and a first conveying unit 10 connected to one end of the first conveying unit 10, and the other end of the first conveying unit 10 is connected to the bidirectional conveying device 3.

[0051] Specifically, as a preferred implementation, both the first conveying unit 10 and the second conveying unit 12 adopt auger conveying devices. The lower end of the silo 1 has a funnel-shaped structure. The second conveying unit 12 includes an outer cylinder 121 and a first auger 122 disposed inside the outer cylinder 121. The outer cylinder 121 is connected to the bottom of the silo 1. A connecting channel 120 is provided at one end of the outer cylinder 121. The connecting channel 120 is made of a pipe fitting. One end of the cylinder of the first conveying unit 10 is connected to the lower end of the connecting channel 120, and the other end extends to one side of the bidirectional transmission device and is located directly above the bidirectional conveying unit. A material discharge port 101 is opened on the cylinder. Through the second conveying device, the coal stored in the silo 1 can be discharged evenly in layers. When the coal stored in the silo 1 circulates and dissipates heat, it is beneficial to concentrate on taking better heat exchange methods when discharging the coal stored in the middle area of ​​the silo 1, such as using mixed new coal and forced ventilation for heat dissipation. It is also beneficial to circulate the coal in the middle area to the upper layer of the other silo 1.

[0052] Furthermore, as a specific implementation method, refer to Figure 1 - Figure 13The hopper 1 includes two hoppers spaced apart along the conveying direction of the bidirectional conveying device, and the hopper 51 and the guide pipe 5 are both located on the same side of the two hoppers 1.

[0053] Specifically, in this embodiment, two storage chambers 1 can be used to store coal and circulate the coal. The circulation of the coal can dissipate heat and prevent the coal from overheating.

[0054] Example 2 Please refer to Figure 14 As a specific implementation method, the present invention provides a coal silo coal overheating prevention circulation device. As a specific implementation method, the difference between this embodiment and the first embodiment is that a bidirectional conveying device 3 is connected to both sides of the hopper 51, and each bidirectional conveying device 3 corresponds to two silos 1. The upper end of the guide pipe 5 is connected to two discharge pipes 52.

[0055] Specifically, it should be noted that in this embodiment, every two silos 1 form a group, and each group of silos 1 is provided with a material guide funnel 2 at the top. The structure of the material guide funnel 2 and the silos 1 is the same as in Embodiment 1, and will not be described in detail here. A material guide pipe 5 is provided between the two groups of silos 1. The material guide pipe 5 is also connected to the hopper 23. A flow guide pipe 4 is also coaxially provided on the outside of the material guide pipe 5. The lower end of the flow guide pipe 4 is connected to the gas collecting pipe 42. Two discharge pipes 52 are provided at the upper end of the material guide pipe 5, corresponding one-to-one with the two material guide funnels 2. A control valve (not shown in the figure) is provided on both discharge pipes 52 to control the opening and closing of the discharge pipes 52. With this arrangement, when the two groups of silos 1 cooperate, the coal stored in the four silos 1 can be circulated. The coal storage circulation in the four silos 1 can share a set of material guide pipes 5 and hoppers 23, which saves costs and facilitates the compact arrangement of silos 1, saving floor space.

[0056] As one implementation method, in this embodiment, the cyclic operation mode is as follows: for ease of description, the four compartments 1 are respectively compartment 1-1, compartment 1-2, compartment 1-3 and compartment 1-4, and their cyclic mode includes four types.

[0057] The first method involves internal circulation within a single storage compartment 1. This circulates the coal stored at the bottom and middle layers of compartment 1 to the top. First, the bottom layer of coal is placed over the top layer. Then, the warmer middle layer coal is circulated to the top, and circulation stops. This process then moves the coal from the bottom layer to the middle layer. Since the original top and bottom layers were at a lower temperature, circulating the warmer middle layer coal to the top facilitates heat dissipation, effectively preventing overheating of the coal. It should be noted that this circulation method can also be used in Example 1.

[0058] The second type is the circulation of coal stored in any two bins 1. Its working method is the same as that described in Example 1, and will not be repeated here.

[0059] The third method involves circulating the coal stored in any three or four silos 1. For example, the coal stored at the bottom of silo 1 is first circulated to silo 12. Then, the coal stored in the middle layer of silo 11, the bottom layer of silo 12, and the bottom layer of silo 13 are simultaneously output into hopper 51 and mixed. The middle layer coal and the bottom layer coal are mixed and then transported to the silos 1 with space in the four silos 1. The circulation of coal in the four silos 1 is consistent with the circulation of coal in the three silos 1. At least one silo 1 needs to have at least one-third of the storage space. The bottom layer coal in one silo 1 is first circulated to the silo 1 with control. Then, the middle layer coal is mixed with the bottom layer coal in the other three silos 1.

[0060] It should be noted that the drive motor 24 of the feed hopper 2 can be intelligently controlled, and the control valve on the discharge pipe 52 is an electrically controlled valve. Each bin 1 is equipped with a sensor to collect the amount of coal stored in the bin 1. The sensor detects the amount of coal stored and controls the working state of the electrically controlled valve and the drive motor 24 based on the detected amount of coal stored, thereby controlling the feeding direction of the feed hopper 51 and ensuring the normal operation of the cycle. The sensor can be a vision sensor, which collects image information of the coal stored in the bin 1, analyzes it, and obtains the height of the coal stored, thereby obtaining the amount of coal stored.

[0061] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A coal silo overheat protection and circulation device, comprising a coal silo, the coal silo being equipped with a discharge unit, characterized in that, Also includes: A bidirectional conveying device (3) is connected to the discharge unit and is used to collect and convey the material discharged from the discharge unit. A feed hopper (2) is set on the top of the coal silo and includes a discharge port (21) corresponding to the coal silo. The material guide pipe (5) is connected to one end of the bidirectional conveying device (3) and the other end is connected to the material guide funnel (2) for conveying materials to the material guide funnel (2).

2. The coal overheating prevention and circulation device for coal silos according to claim 1, characterized in that, The feeding funnel (2) includes a hopper body (23) and two discharge ports (21). A flip plate (20) is provided inside the hopper body (23), and the flip plate (20) can flip to block either discharge port (21).

3. The coal overheating prevention and circulation device for coal silos according to claim 2, characterized in that, The flip plate (20) is driven by a drive shaft (22), and two discharge ports (21) are located on both sides of the drive shaft (22). Inclined plates (210) are provided on the drive shaft (22) extending downward to the two discharge ports (21). Multiple guide plates (211) are provided on the inclined plates (210).

4. The coal overheating prevention and circulation device for coal silos according to claim 1, characterized in that, The feed pipe (5) is connected to the hopper (51), and the hopper (51) is connected to the bidirectional conveying device (3).

5. A coal overheating prevention and circulation device for coal silos according to claim 4, characterized in that, The bidirectional conveying device (3) is a bidirectional conveyor belt.

6. A coal overheating prevention and circulation device for coal silos according to claim 5, characterized in that, A guide pipe (4) is coaxially arranged around the feed pipe (5). The upper end of the guide pipe (4) is open, and the lower end is connected to multiple gas collecting pipes (42). Multiple through holes are evenly distributed on the side wall of the gas collecting pipe (42) that extends into the hopper (51).

7. A coal overheating prevention and circulation device for coal silos according to claim 6, characterized in that, Multiple gas collecting pipes (42) are evenly spaced, and the through holes are located at the top of the gas collecting pipes (42).

8. A coal overheating prevention and circulation device for coal silos according to claim 4, characterized in that, The discharge unit includes a second conveying unit (12) located at the bottom of the silo (1) and a first conveying unit (10) connected to one end of the first conveying unit (10). The other end of the first conveying unit (10) is connected to the bidirectional conveying device (3).

9. A coal silo overheat protection circulation device according to claim 8, characterized in that, The hopper (1) includes two hoppers (51) spaced apart along the conveying direction of the bidirectional conveying device. The hoppers (51) and the guide pipes (5) are both located on the same side of the two hoppers (1).

10. A coal silo overheat protection circulation device according to claim 8, characterized in that, Two bidirectional conveying devices (3) are connected to both sides of the hopper (51), and each bidirectional conveying device (3) corresponds to two bins (1). The upper end of the guide pipe (5) is connected to two discharge pipes (52).

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