Coal supply device with coal bunker intercommunication function

Abstract

The utility model discloses a coal supply device with coal bunker intercommunication function, including a plurality of place high -quality coal or poor quality coal's coal bunker and the coal feeder that sets up respectively corresponding below each coal bunker, each coal bunker bottom all are equipped with main discharge bunker and a plurality of branch bunker, each coal feeder is equipped with at least two feed ports, one feed port is connected with main discharge bunker, and the bottom of a plurality of branch bunkers is connected with the two feed ends of conveying mechanism, and the discharge port of conveying mechanism both ends is connected with the other feed port of coal feeder, and the conveying function of two directions can be realized through the connecting motor of conveying mechanism one end, and the connecting place of main discharge bunker and coal feeder feed port, the connecting place of branch bunker and conveying mechanism feed end all are equipped with the plug -in plate valve and the clearing mechanism respectively, the utility model discloses through the design of each coal bunker cooperation operation, directional transmission and clearing mechanism cooperation of conveying mechanism, realizes the flexible deployment of coal kind and stable conveying, has the advantages such as improving coal bunker utilization, realizing coal kind quick switching and mixed proportioning, reducing conveying blockage.

Description

Technical Field

[0001] This utility model relates to the field of coal bunker supply technology, specifically to a coal supply device with coal bunker interconnection function. Background Technology

[0002] Summer heatwaves cause electricity demand to surge. Thermal power plants, as the "guarantee force" of power supply, bear the heavy responsibility of ensuring the stable operation of the power grid. However, the inflexible load regulation of traditional thermal power units is glaringly exposed during peak electricity demand. Faced with sudden load fluctuations, they are unable to quickly adjust power generation, easily leading to power supply imbalances. To ensure a stable power supply during peak demand, the transformation of thermal power plants to be more flexible is now urgent. With the advancement of "dual-carbon" goals and the continuous increase in the proportion of renewable energy generation, thermal power plants need to undertake more peak-shaving tasks. Traditional raw coal bunkers cannot quickly respond to the coal supply demands of frequent load changes in units. If the coal bunkers can be transformed to achieve flexible coal supply control, then thermal power units can flexibly adjust their power generation in scenarios with intermittent renewable energy supply, which is of great significance for ensuring the stable operation of the power grid. Furthermore, existing coal supply devices are prone to blockages during material transportation, seriously affecting system reliability, while conventional unblocking devices suffer from incomplete unblocking and frequent maintenance. These defects severely restrict the flexibility and economy of power plant operation. Existing technologies urgently need improvement to address these issues.

[0003] With the arrival of the summer peak electricity consumption season, the power system faces severe challenges. Thermal power plants, as a crucial guarantee for the stable operation of the power grid, directly impact the reliability of power supply through their operational flexibility. However, traditional thermal power units are significantly inadequate in coping with rapid load changes, especially given the increasing proportion of renewable energy generation, which necessitates thermal power units undertaking more peak-shaving tasks. The main problems with existing coal supply systems include: a lack of effective interconnection mechanisms between raw coal bunkers, hindering flexible allocation of coal of different qualities; a single feeding method for coal feeders, making it difficult to adapt to rapid load changes in units; and frequent blockages during material transport, severely impacting the continuity of system operation. More significantly, existing unblocking devices generally suffer from unreasonable structural design, resulting in unsatisfactory unblocking effects and high maintenance workloads, increasing operating costs and reducing overall system reliability. These problems severely restrict the peak-shaving capacity and operational economy of thermal power units, becoming particularly prominent in the context of large-scale renewable energy grid integration. Utility Model Content

[0004] To address the aforementioned deficiencies, the purpose of this utility model is to provide a coal supply device with coal bunker interconnection function. This coal supply device not only enables flexible coal feeding control of the raw coal bunker, assists thermal power units in flexibly adjusting power generation, and ensures stable operation of the power grid, but also enables blockage clearing and anti-blockage functions during the transportation process.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a coal supply device with coal bunker interconnection function, comprising several coal bunkers containing high-quality coal or low-quality coal and coal feeders respectively installed below each coal bunker; each coal bunker has a main discharge bin and several distribution bins at its bottom; each coal feeder has at least two feed inlets, one of which is connected to the main discharge bin, and the bottom of the several distribution bins is connected to two feed ends of the conveying mechanism, and the discharge ports at both ends of the conveying mechanism are connected to the other feed inlet of the coal feeder; one end of the conveying mechanism can realize two-way conveying function through a motor; a clearing mechanism and a slide valve are respectively provided at the connection between the main discharge bin and the feeder feed inlet, and at the connection between the distribution bins and the feed end of the conveying mechanism.

[0006] Furthermore, a support frame is provided at the bottom of the conveying mechanism.

[0007] The conveying mechanism uses a screw conveyor or a belt conveyor.

[0008] The unblocking mechanism includes an upper cone, a middle cone, and a lower cylinder arranged sequentially from top to bottom and connected to each other. The top of the upper cone is connected to the bottom of the distribution bin. The middle cone is connected to a power mechanism to achieve rotation. An upper moving blade is provided along the inner wall of the upper cone, with one end of the upper moving blade fixed to the outer side of the middle cone near the top. A middle fixed blade is provided along the inner wall of the middle cone, with one end fixed to the outer side of the upper cone near the bottom and the other end fixed to the outer side of the lower cylinder near the top. A lower moving blade is provided along the inner wall of the lower cylinder, with one end of the lower moving blade fixed to the outer side of the middle cone near the bottom.

[0009] The slide gate valve is connected to the lower cylinder in the unblocking mechanism.

[0010] Both the main feed hopper and the distribution hopper are equipped with an intelligent pulse unblocking system on their outer walls. The intelligent pulse unblocking system includes an annular air pipe installed outside the coal bunker, which has multiple branch air pipes. Each branch air pipe is equipped with a ball valve and a pulse nozzle, the end of which extends into the hopper. An external air pipe is also installed on the annular air pipe, which is connected in sequence to a particle filter, a pressure regulating valve, an air storage tank, an air inlet valve, and an external air source. The system also includes a control system, which controls the single working time and working interval of the pulse nozzle.

[0011] This utility model connects two coal bunkers through a conveying mechanism. During operation, one coal bunker is filled with high-quality coal and the other with low-quality coal. Under normal conditions, when the ratio of high-quality coal to low-quality coal is the same, simply opening the gate valve of each main feed bin is sufficient to meet the requirements.

[0012] When it is necessary to increase the proportion of high-quality coal, the conveying mechanism is started, and the gate valve of the high-quality coal bunker is opened. At this time, the gate valve of the low-quality coal bunker is closed. In this way, high-quality coal can enter the low-quality coal bunker for supply under the forward rotation of the conveying mechanism. Similarly, when it is necessary to increase the proportion of low-quality coal, the gate valve of the low-quality coal bunker is opened. At this time, the gate valve of the high-quality coal bunker is closed, and the conveying mechanism reverses. In this way, low-quality coal can be supplied to the high-quality coal bunker.

[0013] When the thermal power unit requires only high-quality coal, the gate valves of the main feed hopper and the distribution hopper in the low-quality coal bunker are closed simultaneously, while the gate valves of the main feed hopper and the distribution hopper in the high-quality coal bunker are opened. The conveying mechanism rotates forward, allowing high-quality coal to be supplied not only from the bottom of the high-quality coal bunker but also to one end of the low-quality coal bunker. When the thermal power unit requires only low-quality coal, the gate valves of the main feed hopper and the distribution hopper in the high-quality coal bunker are closed simultaneously, while the gate valves of the main feed hopper and the distribution hopper in the low-quality coal bunker are opened. The conveying mechanism rotates in reverse, allowing low-quality coal to be supplied not only from the bottom of the low-quality coal bunker but also to one end of the high-quality coal bunker.

[0014] The unblocking mechanism and intelligent pulse unblocking system in this invention can achieve a good unblocking effect.

[0015] The beneficial effects of this utility model are: through the coordinated operation design of multiple coal bunkers, the directional transmission of the conveying mechanism and the cooperation of the unblocking mechanism, the flexible allocation and stable conveying of coal types can be achieved, which has the advantages of improving the utilization rate of coal bunkers, realizing rapid switching and mixing of coal types, and reducing conveying blockage and maintenance frequency. Attached Figure Description

[0016] The structure and features of this utility model will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the unblocking mechanism in this utility model.

[0019] Figure 3 This is a schematic diagram of the intelligent pulse unblocking system in this utility model.

[0020] Appendix Figure 1-3In the middle section, 1. Inlet valve; 2. Gas storage tank; 3. Pressure regulating valve; 4. Particle filter; 5. Annular air pipe; 6. Pulse nozzle; 8. Ball valve; 9. Branch air pipe; 10. Upper cone; 11. Upper moving blade; 12. Column; 13. Middle cone; 14. Middle fixed blade; 15. Lower moving blade; 16. Slide valve; 17. Lower cylinder; 18. First coal bunker; 19. Second coal bunker; 20. Main feed bin; 21. Distribution bin; 23. Conveying mechanism outlet; 24. First coal feeder; 25. Second coal feeder; 26. Conveying mechanism; 27. Support frame; 28. External air pipe; 29. ​​Drain outlet. Detailed Implementation

[0021] See appendix Figure 1-3 This is one embodiment of the present invention, disclosing a coal supply device with coal bunker interconnection function, including a first coal bunker 18 containing high-quality coal and a second coal bunker 19 containing low-quality coal. A first coal feeder 24 is correspondingly arranged below the first coal bunker 18, and a second coal feeder 25 is correspondingly arranged below the second coal bunker 19. Both the first coal bunker 18 and the second coal bunker 19 have a main discharge bin 20 and a distribution bin 21 at their bottoms. Both the first coal feeder 24 and the second coal feeder 25 have two feed inlets, one of which is connected to the main discharge bin. The bottom of each distribution bin 21 is connected to the two feed ends of the conveying mechanism 26, and the discharge ports at both ends of the conveying mechanism 26 are connected to the other feed port of the coal feeder. One end of the conveying mechanism 26 can realize the conveying function in two directions by connecting a motor. The connection between the main discharge bin 20 and the feed port of the coal feeder, and the connection between the distribution bin 21 and the feed end of the conveying mechanism 26 are respectively equipped with a blockage clearing mechanism and a slide valve 16. The bottom of the conveying mechanism 26 is equipped with a support frame 27. The conveying mechanism 26 adopts a screw conveyor or a belt conveyor.

[0022] This utility model connects two coal bunkers through a conveying mechanism 26. Under normal conditions, when the ratio of high-quality coal to low-quality coal is the same, the requirements can be met by simply opening the gate valve 16 of each main discharge hopper 20.

[0023] When it is necessary to increase the proportion of high-quality coal, the conveying mechanism 26 is started, and the gate valve 16 of the high-quality coal bunker 21 is opened. At this time, the gate valve 16 of the low-quality coal bunker 21 is closed. In this way, high-quality coal can enter the low-quality coal bunker for supply under the forward rotation of the conveying mechanism 26. Similarly, when it is necessary to increase the proportion of low-quality coal, the gate valve 16 of the low-quality coal bunker 21 is opened. At this time, the gate valve 16 of the high-quality coal bunker 21 is closed, and the conveying mechanism 26 is reversed. In this way, low-quality coal can be supplied to the high-quality coal bunker.

[0024] When the thermal power unit requires only high-quality coal, the gate valves 16 of the main discharge bin 20 and the distribution bin 21 in the low-quality coal bin are closed simultaneously, while the gate valves 16 of the main discharge bin 20 and the distribution bin 21 in the high-quality coal bin are opened. The conveying mechanism 26 rotates forward, allowing high-quality coal to be supplied not only from the lower part of the high-quality coal bin but also to one end of the low-quality coal bin. When the thermal power unit requires only low-quality coal, the gate valves 16 of the main discharge bin 20 and the distribution bin 21 in the high-quality coal bin are closed simultaneously, while the gate valves 16 of the main discharge bin 20 and the distribution bin 21 in the low-quality coal bin are opened. The conveying mechanism 26 rotates in reverse, allowing low-quality coal to be supplied not only from the lower part of the low-quality coal bin but also to one end of the high-quality coal bin.

[0025] The unblocking mechanism includes an upper cone 10, a middle cone 13, and a lower cylinder 17 arranged sequentially from top to bottom and connected to each other. The top of the upper cone 10 is connected to the bottom of the distribution bin 21. The middle cone 13 is externally connected to a power mechanism to achieve rotation. An upper moving blade 11 is provided along the inner wall of the upper cone 10. One end of the upper moving blade 11 is fixed to the outer side of the middle cone 13 near the top. A middle fixed blade 14 is provided along the inner wall of the middle cone 13. One end of the middle fixed blade 14 is fixed to the outer side of the upper cone 10 near the bottom, and the other end is fixed to the outer side of the lower cylinder 17 near the top. A lower moving blade 15 is provided along the inner wall of the lower cylinder 17. One end of the lower moving blade 15 is fixed to the outer side of the middle cone 13 near the bottom.

[0026] The unblocking mechanism forms a top-down material flow channel through a hierarchical connection structure of the upper cone 10, the middle cone 13, and the lower cylinder 17. The top of the upper cone 10 connects to the distribution bin 21, allowing coal to enter the conical space first. Driven by a power mechanism, the rotation of the middle cone 13 causes the upper moving blade 11 to cut and crush the coal lumps on the inner wall of the upper cone 10. The middle fixed blade 14 spans the bottom of the upper cone 10 and the top of the lower cylinder 17, serving both as a support structure for the middle cone 13 and, through its fixed position, squeezing and shearing the coal on the inner wall of the middle cone 13, further preventing coal lumps from sticking together. The lower moving blade 15 rotates with the bottom of the middle cone 13, dynamically scraping the coal on the inner wall of the lower cylinder 17 to prevent coal accumulation at the end of the cylinder. By linking the upper and lower moving blades 15 with the central cone 13, and cooperating with the static constraint of the central fixed blade 14, a multi-stage crushing and unblocking mechanism is formed to ensure that the coal material is always in a flowing state during the conveying process, effectively eliminating the blockage phenomenon of materials in the vertical conveying direction.

[0027] Both the main feed hopper 20 and the distribution hopper 21 are equipped with intelligent pulse unblocking systems on their outer walls. The intelligent pulse unblocking system includes an annular air pipe 5 installed outside the coal bunker. The annular air pipe 5 has multiple branch air pipes 9. Each branch air pipe 9 is equipped with a ball valve 8 and a pulse nozzle 6 in sequence. The end of the pulse nozzle 6 extends into the inside of the hopper. An external air pipe 28 is also installed on the annular air pipe 5. The external air pipe 28 is connected in sequence to a particle filter device 4, a pressure regulating valve 3, an air storage tank 2, an air inlet valve 1, and an external air source. The system also includes a control system, which controls the single working time and working interval of the pulse nozzle 6.

[0028] When the intelligent pulse unblocking system is in operation, the ball valve 8 is opened, and the gas from the external gas source passes sequentially through the inlet valve 1, the gas storage tank 2, the pressure regulating valve 3, and the particle filter device 4. It then enters the coal bunker through the ball valve 8 and pulse nozzles 6 installed on each branch gas pipe 9 to blow air and clear blockages. During the unblocking process, the control system controls the single working time and the single time interval of each pulse nozzle 6, so that the adhesive material on the inner wall of the coal bunker is separated from the coal bunker. At the same time, an airflow is formed inside the coal bunker and continuously circulates inside the coal bunker to achieve the effect of unblocking.

[0029] The above description is only a preferred embodiment of the present utility model. The above specific embodiments are not intended to limit the present utility model. Any modifications, alterations or equivalent substitutions made by those skilled in the art based on the above description shall fall within the protection scope of the present utility model.

Claims

1. A coal supply device with coal bunker interconnection function, characterized in that: It includes several coal bunkers containing high-quality or low-quality coal and corresponding coal feeders installed below each bunker; each coal bunker has a main discharge bin and several distribution bins at its bottom; each coal feeder has at least two inlets, one of which is connected to the main discharge bin, and the bottom of the several distribution bins is connected to two inlets of the conveying mechanism, and the outlets at both ends of the conveying mechanism are connected to the other inlet of the coal feeder; one end of the conveying mechanism is connected to a motor to achieve conveying functions in two directions; the connection between the main discharge bin and the coal feeder inlet, and the connection between the distribution bins and the conveying mechanism inlet are respectively equipped with a blockage clearing mechanism and a slide valve.

2. The coal supply device with coal bunker interconnection function according to claim 1, characterized in that: The bottom of the conveying mechanism is equipped with a support frame.

3. The coal supply device with coal bunker interconnection function according to claim 1, characterized in that: The conveying mechanism uses a screw conveyor or a belt conveyor.

4. The coal supply device with coal bunker interconnection function according to claim 1, characterized in that: The unblocking mechanism includes an upper cone, a middle cone, and a lower cylinder arranged sequentially from top to bottom and connected to each other. The top of the upper cone is connected to the bottom of the distribution bin. The middle cone is connected to a power mechanism to achieve rotation. An upper moving blade is provided along the inner wall of the upper cone, with one end of the upper moving blade fixed to the outer side of the middle cone near the top. A middle fixed blade is provided along the inner wall of the middle cone, with one end fixed to the outer side of the upper cone near the bottom and the other end fixed to the outer side of the lower cylinder near the top. A lower moving blade is provided along the inner wall of the lower cylinder, with one end of the lower moving blade fixed to the outer side of the middle cone near the bottom.

5. The coal supply device with coal bunker interconnection function according to claim 4, characterized in that: The slide gate valve is connected to the lower cylinder in the unblocking mechanism.

6. The coal supply device with coal bunker interconnection function according to claim 1, characterized in that: Both the main feed hopper and the distribution hopper are equipped with an intelligent pulse unblocking system on their outer walls. The intelligent pulse unblocking system includes an annular air pipe installed outside the coal bunker, which has multiple branch air pipes. Each branch air pipe is equipped with a ball valve and a pulse nozzle, the end of which extends into the hopper. An external air pipe is also installed on the annular air pipe, which is connected in sequence to a particle filter, a pressure regulating valve, an air storage tank, an air inlet valve, and an external air source. The system also includes a control system, which controls the single working time and working interval of the pulse nozzle.

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