Oxygen-enriched pulverized coal burner

Abstract

The utility model discloses an oxygen-enriched pulverized coal burner which comprises a combustion chamber, an exhaust pipe fixedly communicated with the upper portion of the combustion chamber, a waste discharge pipe fixedly communicated with the lower end of the combustion chamber and a vertical plate fixedly connected with the combustion chamber. The stirring shaft penetrates through the center of the top plate of the combustion chamber and is fixedly communicated with a group of stirring rods; the motor is fixedly connected with the combustion chamber through a motor support, an output set of the motor is fixedly connected with a square hole circular shaft, and the square hole circular shaft is fixedly connected with a driving bevel gear; the driven bevel gear is meshed with the driving bevel gear, a central shaft bearing is connected with the vertical plate, and a central shaft of the driven bevel gear is fixedly connected with the turntable. The utility model relates to the technical field of combustion, in particular to an oxygen-enriched pulverized coal burner. The technical problem to be solved by the utility model is to provide the oxygen-enriched pulverized coal burner, which is favorable for stirring pulverized coal while introducing oxygen and preventing the pulverized coal from being adhered to the wall of the burner, so that the pulverized coal is fully burnt.

Description

Technical Field

[0001] This utility model relates to the application of pulverized coal combustion technology, specifically to an oxygen-enriched pulverized coal burner. Background Technology

[0002] Currently, almost all large boilers both domestically and internationally are pulverized coal boilers. Pulverized coal combustion is a typical oxidation process. To ensure that the pulverized coal can burn completely, a large amount of air is often blown in by a blower, which increases the power consumption of the blower and the plant's power consumption. At the same time, the air blown into the furnace and discharged from the furnace will take away a large amount of boiler heat, thereby reducing boiler efficiency. More seriously, if the coal quality is too poor, the pulverized coal will not be easy to ignite and burn after entering the furnace, and a large amount of residual carbon will burn in the upper part of the boiler, causing the boiler tail to overheat and forcing more desuperheating water to be sprayed. At the same time, it will also increase the carbon content of the boiler fly ash, resulting in the above four energy losses.

[0003] Existing technologies, such as the utility model with authorization announcement number CN203489262U, can adjust the pure oxygen injected into the burner to enable pulverized coal to ignite fully, improve the pulverized coal combustion rate, thereby reducing the combustibles in boiler fly ash and improving boiler efficiency; at the same time, it controls NOx generation.

[0004] Currently, there is a lack of equipment that allows for the simultaneous introduction of oxygen and stirring of pulverized coal, preventing the pulverized coal from sticking to the burner wall and ensuring complete combustion. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an oxygen-enriched pulverized coal burner, which is beneficial to agitate pulverized coal while introducing oxygen, preventing pulverized coal from sticking to the burner wall and ensuring complete combustion of pulverized coal.

[0006] The technical solution of this utility model is: an oxygen-enriched pulverized coal burner, comprising...

[0007] A combustion chamber, wherein an exhaust pipe is provided on the side wall of the combustion chamber and a waste discharge pipe is provided at the bottom of the combustion chamber;

[0008] A stirring assembly is disposed in the combustion chamber, and the stirring assembly includes a stirring shaft, one end of which is fixedly connected to a plurality of stirring rods, and the other end of which passes through the combustion chamber and is connected to a drive assembly;

[0009] The drive assembly includes a motor fixed to the upper end of the combustion chamber by a bracket, the output end of the motor is fixedly connected to a square-hole round shaft, the side wall of the square-hole round shaft is fixedly connected to a drive bevel gear, and a connecting assembly is provided on one side of the drive bevel gear;

[0010] A connecting assembly, comprising a driven bevel gear fixed to the upper end of the combustion chamber via a vertical plate and used in conjunction with a driving bevel gear, and a turntable connected to the driven bevel gear on the other side of the vertical plate, with a circular block at the edge of the turntable;

[0011] It also includes a cooperating support at the upper end of the combustion chamber, the cooperating support including a horizontal groove for use with the circular block and a vertical rod supported at the bottom of the horizontal groove, the vertical rod being able to pass through the combustion chamber; a hollow box for use with the stirring shaft is provided on one side of the vertical rod.

[0012] When the motor drives the stirring shaft to rotate, the active bevel gear drives the driven bevel gear to rotate and moves the circular block within the horizontal groove. The vertical rod drives the stirring shaft to reciprocate up and down through the hollow box.

[0013] Furthermore, the hollow box is fitted onto the surface of the stirring shaft.

[0014] Furthermore, the hollow box connects the stirring shaft to the vertical rod via an L-shaped rod.

[0015] Furthermore, a scraper is fixedly connected to the upper end of the stirring rod.

[0016] Furthermore, both the stirring shaft and the stirring rod are hollow rods, and air inlets are provided on opposite sides of the connection between the stirring shaft and the hollow box, and an external air inlet is provided on the outside of the hollow box.

[0017] Furthermore, the upper end of the stirring rod is evenly provided with multiple air outlets, and the hollow box, air inlet, stirring shaft, stirring rod and air outlets are connected.

[0018] Furthermore, the upper end of the combustion chamber is provided with a conical bottom barrel, the upper end of the conical bottom barrel is provided with a feed pipe, and the lower end of the conical bottom barrel is provided with a discharge pipe located inside the combustion chamber.

[0019] Furthermore, the conical bottom barrel is provided with an L-shaped guide rod, one end of which is connected to the transverse groove, and the other end of which is inserted into the conical bottom barrel and located inside the discharge pipe.

[0020] Furthermore, the outer diameter of the end of the L-guide rod located inside the discharge pipe is equal to the inner diameter of the discharge pipe.

[0021] The beneficial technical effects of this utility model are:

[0022] 1. This device uses a stirring rod to agitate the pulverized coal, enabling it to burn completely and improving combustion efficiency.

[0023] 2. This device achieves oxygen input by setting up air inlet and air outlet, and the oxygen is input by rotation, which improves the effect.

[0024] 3. This device is equipped with a scraper that moves along the combustion chamber wall to scrape off pulverized coal, thus avoiding waste of pulverized coal.

[0025] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] Figure 2 This is a schematic diagram of the connection between the turntable and the driven bevel gear in this utility model.

[0028] Figure 3 This is a schematic diagram of the structure of the collaborative support of this utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the stirring assembly of this utility model;

[0030] Figure 5 This is a schematic diagram of the structure of the discharge pipe of this utility model located in the conical bottom barrel.

[0031] The attached figures are labeled as follows:

[0032] 1. Motor; 2. Square-hole round shaft; 3. Driving bevel gear; 4. Driven bevel gear; 5. Vertical plate; 6. Combustion chamber; 7. Exhaust pipe; 8. Waste discharge pipe; 9. L-shaped mounting plate; 10. Conical bottom barrel; 11. Feed pipe; 12. Round block; 13. Turntable; 14. L-shaped guide rod; 15. Horizontal groove; 16. Vertical rod; 17. L-shaped rod; 18. Hollow box; 19. External air inlet; 20. Square shaft; 21. Stirring shaft; 22. Air inlet; 23. Scraper; 24. Stirring rod; 25. Air outlet; 26. Discharge pipe. Detailed Implementation

[0033] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0034] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate for the embodiments of this application described herein.

[0035] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship described in the embodiments and shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] Example 1:

[0037] like Figure 1 , Figure 2 and Figure 4 As shown, this utility model specifically relates to an oxygen-enriched pulverized coal burner, including...

[0038] Combustion chamber 6, the side wall of combustion chamber 6 is provided with exhaust pipe 7, and the bottom of combustion chamber 6 is provided with exhaust pipe 8;

[0039] A stirring assembly is disposed inside the combustion chamber 6, and the stirring assembly includes a stirring shaft 21. One end of the stirring shaft 21 is fixedly connected to a plurality of stirring rods 24, and the other end of the stirring shaft 21 passes through the outside of the combustion chamber 6 and is connected to the drive assembly.

[0040] The drive assembly includes a motor 1 fixed to the upper end of the combustion chamber 6 by a bracket. A square-hole round shaft 2 is fixedly connected to the output end of the motor 1. A drive bevel gear 3 is fixedly connected to the side wall of the square-hole round shaft 2. A connecting assembly is provided on one side of the drive bevel gear 3.

[0041] The upper end of the stirring shaft 21 is provided with a square shaft 20, which is connected to the square hole round shaft 2 so that the motor 1 can drive the stirring shaft 21 to rotate.

[0042] The connecting assembly includes a driven bevel gear 4 fixed to the upper end of the combustion chamber 6 via a vertical plate 5 and used in conjunction with the driving bevel gear 3. A turntable 13 connected to the driven bevel gear 4 is provided on the other side of the vertical plate 5, and a round block 12 is provided at the edge of the turntable 13.

[0043] It also includes a cooperating support at the upper end of the combustion chamber 6. The cooperating support includes a horizontal groove 15 that works with the circular block 12 and a vertical rod 16 that is supported at the bottom of the horizontal groove 15. The vertical rod 16 can pass through the combustion chamber 6. A hollow box 18 that works with the stirring shaft 21 is provided on one side of the vertical rod 16.

[0044] When the motor 1 drives the stirring shaft 21 to rotate, the active bevel gear 3 drives the driven bevel gear 4 to rotate and drives the round block 12 to move in the horizontal groove 15. The vertical rod 16 drives the stirring shaft 21 to move up and down through the hollow box 18.

[0045] The stirring rod 24 rotates and moves up and down repeatedly to stir the pulverized coal, ensuring full contact between the pulverized coal and air, thus enabling complete combustion and improving combustion efficiency.

[0046] The hollow box 18 is fitted onto the surface of the stirring shaft 21.

[0047] The hollow box 18 connects the stirring shaft 21 to the vertical rod 16 via the L-rod 17.

[0048] The upper end of the stirring rod 24 is fixedly connected to a scraper 23. By setting the scraper 23, the scraper 23 moves along the wall of the combustion chamber 6 to scrape off coal powder and avoid coal powder waste.

[0049] Add an appropriate amount of pulverized coal into combustion chamber 6. Turn on motor 1. Motor 1 drives square-hole shaft 2 and driving bevel gear 3 to rotate. Square-hole shaft 2 drives square shaft 20, stirring shaft 21, stirring rod 24, and scraper 23 to rotate. Driving bevel gear 3 drives driven bevel gear 4 and turntable 13 to rotate. Turntable 13 drives round block 12 to move in transverse groove 15. Round block 12 moves back and forth in transverse groove 15. Since round block 12 is located at the edge of turntable 13, when round block 12 moves in transverse groove 15, transverse groove 15 drives vertical rod 16, L-rod 17, and hollow box 18 to move back and forth up and down. Since hollow box 18 is connected to stirring shaft 21, hollow box 18 drives stirring shaft 21, stirring rod 24, and scraper 23 to move back and forth up and down. Stirring shaft 21 drives square shaft 20 to move back and forth up and down along square-hole shaft 2. Scraper 23 moves along the burner cylinder wall to scrape off pulverized coal and avoid pulverized coal waste. The stirring rod 24 stirs the pulverized coal, enabling it to burn completely.

[0050] Furthermore, the combustion of pulverized coal in the combustion chamber is existing technology. Therefore, the specific combustion structure is not disclosed in the figure, and this patent mainly protects how to ensure the complete combustion of pulverized coal.

[0051] Example 2:

[0052] The difference between Example 2 and Example 1 is that:

[0053] like Figure 1 , Figure 3 and Figure 4As shown, both the stirring shaft 21 and the stirring rod 24 are hollow rods, and air inlets 22 are provided on opposite sides of the connection between the stirring shaft 21 and the hollow box 18. An external air inlet 19 is provided on the outside of the hollow box 18, which facilitates oxygen delivery.

[0054] The upper end of the stirring rod 24 is evenly provided with multiple air outlets 25, and the hollow box 18, air inlet 22, stirring shaft 21, stirring rod 24 and air outlets 25 are connected. By setting the air inlet 22 and air outlets 25, oxygen can be input, and the oxygen is input by rotation, which has a better effect.

[0055] Connect one end of the hose to the oxygen source and the other end to the external gas nozzle 19. During combustion, control the oxygen source to supply oxygen. The oxygen passes through the external gas nozzle 19, the hollow box 18, the air inlet 22, the stirring shaft 21, and the stirring rod 24, and is then sprayed out from the air outlet 25 to achieve oxygen input. The rotation of the oxygen input makes the effect better.

[0056] Example 3:

[0057] The difference between Example 3 and Example 1 is that:

[0058] like Figures 1-5 As shown, the upper end of the combustion chamber 6 is provided with a conical bottom barrel 10, the upper end of the conical bottom barrel 10 is provided with a feed pipe 11, and the lower end of the conical bottom barrel 10 is provided with a discharge pipe 26 located in the combustion chamber 6. By setting the conical bottom barrel 10, it is convenient to store pulverized coal.

[0059] The cone-shaped barrel 10 is fixed to the combustion chamber 6 by the L-mount plate 9.

[0060] The conical bottom barrel 10 is equipped with an L-shaped guide rod 14. One end of the L-shaped guide rod 14 is connected to the transverse groove 15, and the other end of the L-shaped guide rod 14 is inserted into the conical bottom barrel 10 and located inside the discharge pipe 26. The L-shaped guide rod 14 moves back and forth. When the L-shaped guide rod 14 is disengaged from the discharge pipe 26, the pulverized coal falls into the combustion chamber 6 through the discharge pipe 26. When the L-shaped guide rod 14 enters the discharge pipe 26, the pulverized coal cannot fall, and the L-shaped guide rod 14 squeezes out the residual pulverized coal inside the discharge pipe 26. This achieves automatic addition of pulverized coal.

[0061] The outer diameter of the end of the L-guide rod 14 located inside the discharge pipe 26 is equal to the inner diameter of the discharge pipe 26.

[0062] Coal powder is added into the cone-bottom barrel 10 through the feed pipe 11. When the transverse trough 15 moves back and forth, it drives the L-guide rod 14 to move back and forth. When the L-guide rod 14 is separated from the discharge pipe 26, the coal powder falls into the combustion chamber 6 through the discharge pipe 26. When the L-guide rod 14 enters the discharge pipe 26, the coal powder cannot fall, and the L-guide rod 14 squeezes out the residual coal powder in the discharge pipe 26.

[0063] The above embodiments are merely specific implementations of this utility model, used to illustrate the technical solutions of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features within the technical scope disclosed in this utility model. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model.

Claims

1. An oxygen-enriched pulverized coal burner, characterized in that, include A combustion chamber, wherein an exhaust pipe is provided on the side wall of the combustion chamber and a waste discharge pipe is provided at the bottom of the combustion chamber; A stirring assembly is disposed in the combustion chamber, and the stirring assembly includes a stirring shaft, one end of which is fixedly connected to a plurality of stirring rods, and the other end of which passes through the combustion chamber and is connected to a drive assembly; The drive assembly includes a motor fixed to the upper end of the combustion chamber by a bracket, the output end of the motor is fixedly connected to a square-hole round shaft, the side wall of the square-hole round shaft is fixedly connected to a drive bevel gear, and a connecting assembly is provided on one side of the drive bevel gear; A connecting assembly, comprising a driven bevel gear fixed to the upper end of the combustion chamber via a vertical plate and used in conjunction with a driving bevel gear, and a turntable connected to the driven bevel gear on the other side of the vertical plate, with a circular block at the edge of the turntable; It also includes a cooperating support at the upper end of the combustion chamber, the cooperating support including a horizontal groove for use with the circular block and a vertical rod supported at the bottom of the horizontal groove, the vertical rod being able to pass through the combustion chamber; a hollow box for use with the stirring shaft is provided on one side of the vertical rod. When the motor drives the stirring shaft to rotate, the active bevel gear drives the driven bevel gear to rotate and moves the circular block within the horizontal groove. The vertical rod drives the stirring shaft to reciprocate up and down through the hollow box.

2. The oxygen-enriched pulverized coal burner according to claim 1, characterized in that, The hollow box is fitted onto the surface of the stirring shaft.

3. The oxygen-enriched pulverized coal burner according to claim 2, characterized in that, The hollow box connects the stirring shaft to the vertical rod via an L-shaped rod.

4. The oxygen-enriched pulverized coal burner according to claim 1, characterized in that, A scraper is fixedly connected to the upper end of the stirring rod.

5. An oxygen-enriched pulverized coal burner according to claim 1, characterized in that, Both the stirring shaft and the stirring rod are hollow rods, and air inlets are provided on opposite sides of the connection between the stirring shaft and the hollow box. An external air inlet is provided on the outside of the hollow box.

6. An oxygen-enriched pulverized coal burner according to claim 5, characterized in that, The upper end of the stirring rod is evenly provided with multiple air outlets, and the hollow box, air inlet, stirring shaft, stirring rod and air outlets are connected.

7. An oxygen-enriched pulverized coal burner according to claim 1, characterized in that, The upper end of the combustion chamber is provided with a conical bottom barrel, the upper end of the conical bottom barrel is provided with a feed pipe, and the lower end of the conical bottom barrel is provided with a discharge pipe located inside the combustion chamber.

8. An oxygen-enriched pulverized coal burner according to claim 7, characterized in that, The conical bottom barrel is equipped with an L-shaped guide rod. One end of the L-shaped guide rod is connected to the transverse groove, and the other end of the L-shaped guide rod is inserted into the conical bottom barrel and located inside the discharge pipe.

9. An oxygen-enriched pulverized coal burner according to claim 8, characterized in that, The outer diameter of the end of the L-guide rod located inside the discharge pipe is equal to the inner diameter of the discharge pipe.

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