Raw coal bunker intercommunication device
By designing the interoperability device of raw coal bins, including coal extraction machines, two-way conveyors and vibration devices, the problem of slow coal distribution in the existing technology has been solved, rapid allocation and combustion have been achieved, power generation costs have been reduced, and economic benefits have been improved.
Patent Information
- Application Number
- CN202422079198.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-27
AI Technical Summary
It is difficult to quickly allocate different coal types in the existing technology, which leads to thermal power plants being unable to meet coal demand in time when load changes, affecting unit load regulation and economics.
A raw coal bin intercommunication device is designed, including two raw coal bins, coal withdrawal machine, two-way conveyor, blanking pipe and feeding machine. Through the vibration device and specific equipment layout, rapid coal types are adjusted and mixed.
It has achieved rapid coal distribution to meet the needs of high-quality coal at high loads and higher cost-effective coal at low loads, reducing power generation costs and improving economic benefits.
Smart Images
Figure CN222974404U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of raw coal bins, and particularly relates to an intercommunication device for raw coal bins. Background Art
[0002] Existing technology: The coal pulverizing system in a thermal power plant consists of a raw coal bin, a coal feeder, and a coal mill in a one-to-one correspondence, that is, a certain type of coal is stored in one raw coal bin and enters the coal feeder through the coal dropping pipe at the bottom of the raw coal bin, and is transported to the coal mill by the coal feeder for grinding and pulverizing. If the coal pulverizing system wants to quickly co-fire another type of coal, it is necessary to burn out the coal stored in the corresponding raw coal bin and then refill the coal. This takes a long time (more than 8 hours), cannot meet the load demand in a timely manner, and the unit load regulation lags. To meet the needs of coal procurement and co-firing in coal-fired power plants, increase the competitiveness of power plants in the electricity spot market, and at the same time quickly meet the assessment of the load acceptance capacity of thermal power plants by the dispatching, a device for quickly taking and changing coal in raw coal bins is required. That is, when the unit takes on a high load, high-quality coal is taken to increase the unit output; when the unit takes on a low load, imported coal with higher cost performance is taken to improve the economy. Content of the Utility Model
[0003] In view of the deficiencies in the existing technology, the utility model provides an intercommunication device for raw coal bins.
[0004] To achieve the above object, the technical solution adopted by the utility model is: An intercommunication device for raw coal bins includes a first coal bin and a second coal bin. Coal extractors are respectively arranged on the first coal bin and the second coal bin. Coal bin slide gates are arranged at the lower ends of the first coal bin and the second coal bin. A coal dropping pipe is arranged below the coal bin slide gate. A feeder is arranged on the coal dropping pipe. The coal dropping pipe is connected to a coal feeder. The discharge port of the coal extractor is connected to a two-way conveyor through a discharge pipe. The two-way conveyor is provided with 2 discharge pipes, and the discharge pipes are respectively connected to the feeders of the first coal bin and the second coal bin. Slide gates are arranged on the discharge pipes.
[0005] Vibrating devices are respectively arranged on the first coal bin and the second coal bin.
[0006] The vibrating device is an air cannon vibrating device.
[0007] The air cannon vibrating device includes a first air cannon arranged above the coal extractor, a second air cannon arranged above the first air cannon, and third air cannons arranged on both sides of the second air cannon.
[0008] The installation angle of the coal extractor forms an angle of 10° with the horizontal direction.
[0009] Advantages of the utility model: By arranging coal reclaimers on two raw coal bins, as well as arranging a two-way conveyor, a blanking pipe, and a feeding machine, the utility model can achieve rapid coal type allocation, and under the condition of meeting the high-load test requirements of capacity-based electricity price, achieve the maximum blending of economic coal types, reduce the power generation cost, and improve the economic benefit. Brief Description of the Drawings
[0010] Figure 1 It is a schematic structural diagram of the utility model;
[0011] Figure 2 It is a top view of the utility model;
[0012] Figure 3 It is an installation schematic diagram of the vibration device of the utility model. Detailed Implementation Manner
[0013] As Figures 1 - 3 shown, a raw coal bin interconnection device includes a first coal bin 11 and a second coal bin 12. Coal reclaimers 2 are respectively arranged on the first coal bin 11 and the second coal bin 12. Coal bin flap gates 8 are arranged at the lower ends of the first coal bin 11 and the second coal bin 12. A coal dropping pipe 1 is arranged below the coal bin flap gates 8. A feeding machine 7 is arranged on the coal dropping pipe 1. The coal dropping pipe 1 is connected to a coal feeder 9. The discharge port of the coal reclaimer 2 is connected to a two-way conveyor 4 through a discharge pipe 3. The two-way conveyor 4 is provided with 2 blanking pipes 5. The blanking pipes 5 are respectively connected to the feeding machines 7 of the first coal bin 11 and the second coal bin 12. A pipe flap gate 6 is arranged on the blanking pipe 5.
[0014] Vibration devices 10 are respectively arranged on the first coal bin 11 and the second coal bin 12. The vibration device 10 is an air cannon vibration device. The air cannon vibration device includes a first air cannon 101 arranged above the coal reclaimer 2, a second air cannon 102 arranged above the first air cannon 101, and third air cannons 130 arranged on both sides of the second air cannon 102. Through the experience obtained from on-site tests, this form has the best effect of preventing coal blockage in the raw coal bin and ensures the smoothness of coal reclaiming.
[0015] The installation angle of the coal reclaimer 2 forms an angle of 10° with the horizontal direction. Through the experience obtained from on-site tests, this angle can improve the smoothness of internal coal reclaiming.
[0016] The first coal bunker 11 and the second coal bunker 12 store different coal types respectively. When coal blending is not required, the coal feeder 2, the two-way conveyor 4, the material pipe flap gate 6, and the feeder 7 are all closed, the bunker flap gates 8 of the first coal bunker 11 and the second coal bunker 12 are opened, and the first coal bunker 11 and the second coal bunker 12 work independently, and their respective coal feeders 9 supply coal to the corresponding coal mills. When coal blending is required, for example, when the second coal bunker 12 needs to blend the coal from the first coal bunker 11, the bunker flap gate 8 of the second coal bunker 12 is closed, the coal feeder 2 of the first coal bunker 11 and the material pipe flap gate 6 on the side of the second coal bunker 12 are opened, the direction of the two-way conveyor 4 is set to the direction of the second coal bunker 12, the coal feeder 2 takes out the coal from the first coal bunker 11, and after passing through the discharge pipe 3, the two-way conveyor 4, the downcomer 5, and the feeder 7, it is output by the feeder 7 to the coal chute 1 and then enters the coal feeder 9. It is also possible to open the bunker flap gate 8 of the second coal bunker 12 according to the load requirement, so that the two kinds of coal are mixed in the coal chute 1 of the second coal bunker 12 and then output to the coal feeder 9 to realize the co-combustion of the two kinds of coal, and the co-combustion ratio is adjusted by adjusting the power of the coal feeder 2 and the two-way conveyor 4. Similarly, the switches of the corresponding equipment can also be adjusted to transfer the coal in the second coal bunker 12 to the first coal bunker 11.
[0017] The above shows and describes the basic principle, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, simple modifications and substitutions by those of ordinary skill in the art are within the protection scope of the present utility model.
Claims
1. A raw coal bunker intercommunication device, characterized in that: It includes a first coal bunker and a second coal bunker, wherein the first coal bunker and the second coal bunker are respectively provided with coal taking machines, the lower ends of the first coal bunker and the second coal bunker are provided with coal bunker plug-in doors, a coal dropping pipe is provided under the coal bunker plug-in doors, a feeder is provided on the coal dropping pipe, the coal dropping pipe is connected to the coal feeder, the coal taking machine discharge port is connected to a bidirectional conveyor through the discharge pipe, the bidirectional conveyor is provided with two dropping pipes, the dropping pipes are respectively connected to the feeders of the first coal bunker and the second coal bunker, and a feed pipe plug-in door is provided on the dropping pipe.
2. A raw coal bunker intercommunication device as claimed in claim 1, characterized in that: The first coal bunker and the second coal bunker are respectively provided with a rapping device.
3. A raw coal bunker intercommunication device as claimed in claim 2, characterized in that: The rapping device is an air cannon rapping device.
4. A raw coal bunker intercommunication device as claimed in claim 3, characterized in that: The air cannon rapping device comprises a first air cannon arranged above the coal taking machine, a second air cannon arranged above the first air cannon, and a third air cannon arranged on both sides of the second air cannon.
5. The raw coal bunker intercommunication device according to claim 1, characterized in that: The installation angle of the coal taking machine is 10° with the horizontal direction.