A plasma pulverized coal burner

Abstract

The present invention discloses a plasma pulverized coal burner, which relates to the technical field of burners and includes a base. A pushing component is arranged at the upper end of the base to push the pulverized coal to a designated position, and a protective plate is arranged at the edge part of the upper end of the base; for this plasma pulverized coal burner, when the movable rod moves, it drives the arc plate rotatably installed at its end to move, so as to tightly press the arc plate against the inner wall of the screening cylinder, and rotate along with the fixed block, thereby further screening the pulverized coal in the screening cylinder, avoiding the caking of the pulverized coal, and at the same time making it fall onto the collecting plate to ensure uniform particle size distribution, thus ensuring the stability of combustion.

Description

Technical Field

[0001] The present invention relates to burner technology, and more particularly to a plasma pulverized coal burner. Background Art

[0002] The pulverized coal burner is an important part of the cement rotary kiln system, which plays an important role in the stable operation of the rotary kiln, and has a significant impact on reducing fuel consumption, improving the quality of clinker production, and reducing harmful gas emissions. When starting a cold kiln, 40% (thermal equivalent) of high calorific value starting fuel oil or natural gas and stable combustion backup fuel are required to ignite the pulverized coal of the burner, which has disadvantages such as high cost, difficult fuel storage and supply, high temperature corrosion of the heating surface, reduced overall efficiency, and the presence of heavy metals and other highly toxic components in the exhaust gas.

[0003] In the past thirty years, plasma ignition technology has been successively used in pulverized coal burners of thermal power industry boilers. The power consumption ratio of plasma ignition is 1.2 - 1.4% of the thermal power of the pulverized coal burner. Generally, when plasma ignition is stably burning, the NOx emission is reduced by 30 - 50%, and the unburned carbon amount is reduced by 50 - 75%. Currently, the commonly used pulverized coal ignition is a 50 - 250 kVA plasma arc torch, which is based on a DC plasma arc torch with a current of 200 - 500 A and a voltage of 250 - 400 V. The anode life is generally less than 500 hours, and the cathode life is less than 250 hours, resulting in high operating costs.

[0004] When the existing equipment is in use, uneven particle size and distribution of pulverized coal will lead to uneven combustion, thus affecting combustion stability; at the same time, it may cause blockage or unstable flow in the system for transporting pulverized coal, affecting the normal operation of the burner.

[0005] Due to the physical properties of pulverized coal (such as hardness, humidity), which may affect its crushing and distribution effects, resulting in uneven contact between pulverized coal and plasma, it may cause a reduction in combustion efficiency, thus a plasma pulverized coal burner has been developed. Summary of the Invention

[0006] The purpose of the present invention is to provide a plasma pulverized coal burner to solve the above deficiencies in the prior art.

[0007] To achieve the above purpose, the present invention provides the following technical solution: a plasma pulverized coal burner, including a base, a pushing assembly is arranged at the upper end of the base, the pulverized coal is pushed to a specified position through the pushing assembly, and a protective plate is arranged at the edge part of the upper end of the base;

[0008] A pressing assembly, which is assembled at the upper end of the pushing assembly, is used for further screening the pulverized coal;

[0009] Among them, the pressing component includes a vertical column, and a screening cylinder is arranged at the end of the vertical column. A fixing block is arranged on the inner wall of the screening cylinder, and the end of the fixing block penetrates and extends to the outside of the screening cylinder and is connected to the end of the vertical column;

[0010] A support block is arranged at one end of the fixing block away from the vertical column. A plurality of telescopic rods are slidably installed on the outer surface of the support block, and the plurality of telescopic rods are evenly distributed on the outer surface of the support block. At the same time, the end of the telescopic rod penetrates and extends into the support block;

[0011] A fixing column is arranged at one end of the support block away from the fixing block. A ring is slidably installed on the outer surface of the fixing column. A limiting rod corresponding to the telescopic rod is rotatably installed on the outer surface of the ring. A connecting block corresponding to the limiting rod is rotatably installed on the outer surface of the fixing column. A movable rod is rotatably installed at the end of the connecting block, and the end of the limiting rod away from the ring is rotatably connected to the outer surface of the movable rod;

[0012] An arc-shaped plate is rotatably installed at one end of the movable rod away from the connecting block. The inner wall of the arc-shaped plate is connected to the end of the telescopic rod. The outer surface of the arc-shaped plate is attached to the inner wall of the screening cylinder. At the same time, an elastic member is sleeved on the outer surface of the fixing column, and one end of the elastic member is connected to the connecting block and the other end is connected to the end of the ring;

[0013] A collecting plate is arranged at one end of the vertical column, and the collecting plate is located at the lower end of the screening cylinder.

[0014] As a further optimized solution of the present invention, sliding grooves are symmetrically opened on the inner wall of the collecting plate, a pushing block is slidably installed on the inner wall of the sliding groove, and a lead-out hole is opened on the inner wall of the collecting plate.

[0015] As a further optimized solution of the present invention, through holes are opened at the upper end of the outer surface of the screening cylinder.

[0016] As a further optimized solution of the present invention, the pushing component includes a driving member connected to the protection plate. The output end of the driving member penetrates and extends into the protection plate. At the same time, a crankshaft is arranged at the output end of the driving member, and a pair of push rods are rotatably installed on the outer surface of the crankshaft.

[0017] As a further optimized solution of the present invention, a positioning block is arranged at the upper end of the base. Guide grooves are symmetrically opened in the inner cavity of the positioning block. Sliders are slidably installed on the inner walls of the guide grooves. One end of the slider is rotatably connected to the push rod.

[0018] As a further optimized solution of the present invention, a driving rod is arranged at one end of the slider away from the push rod, and an adjusting block is arranged at the end of the driving rod.

[0019] As a further optimized solution of the present invention, a protective rod is rotatably installed on one side of the slider, and one end of the protective rod away from the slider is rotatably connected to symmetrically arranged adjusting blocks.

[0020] As a further optimized solution of the present invention, a connecting rod is arranged at the upper end of the adjusting block, and the upper end of the connecting rod is slidably connected to the lower end of the collecting plate.

[0021] As a further optimized solution of the present invention, a conveying block is arranged at the upper end of the base and on one side of the positioning block. A hole is formed through one end of the conveying block, and at the same time, a feeding hole is formed at the upper end of the conveying block, and the feeding hole is located below the discharging hole.

[0022] As a further optimized solution of the present invention, a movable block is slidably installed on the inner wall of the hole. An adjusting rod is arranged at the end of the movable block, and the end of the adjusting rod is connected to the adjusting block.

[0023] Compared with the prior art, a plasma pulverized coal burner provided by the present invention has the following beneficial effects: When the movable rod moves, it drives the arc-shaped plate rotatably installed at its end to move, thereby pressing the arc-shaped plate tightly against the inner wall of the screening cylinder, and rotating along with the fixed block, so as to further screen the pulverized coal inside the screening cylinder, avoid the caking of the pulverized coal, and at the same time make it fall onto the collecting plate, ensuring that the particle size distribution is uniform, thereby ensuring the stability of combustion.

[0024] When the adjusting block moves, it can drive the connecting rod to move synchronously. A magnetic block is arranged at the upper end of the connecting rod. At the same time, after the connecting rod fits with the collecting plate, the magnetic block on the connecting rod and the magnetic block at the lower end of the pushing block attract each other. Therefore, when the connecting rod moves, it can drive the pushing block to move synchronously, so as to push the pulverized coal, making the pulverized coal slowly enter the pushing assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0026] Figure 1 The first schematic diagram of the overall structure provided by the embodiment of the present invention;

[0027] Figure 2 The second schematic diagram of the overall structure provided by the embodiment of the present invention;

[0028] Figure 3Cross-sectional view of the overall internal structure provided by the embodiment of the present invention;

[0029] Figure 4 Schematic diagram of the pressing component structure provided by the embodiment of the present invention;

[0030] Figure 5 First cross-sectional view of the internal structure of the pressing component provided by the embodiment of the present invention;

[0031] Figure 6 Second cross-sectional view of the internal structure of the pressing component provided by the embodiment of the present invention;

[0032] Figure 7 Schematic diagram of the collecting plate structure provided by the embodiment of the present invention;

[0033] Figure 8 Schematic diagram of the pushing component structure provided by the embodiment of the present invention;

[0034] Figure 9 Cross-sectional view of the internal structure of the pushing component provided by the embodiment of the present invention.

[0035] Explanation of reference numerals:

[0036] 1. Base; 2. Pressing component; 3. Pushing component; 11. Protective plate; 21. Column; 211. Collecting plate; 212. Chute; 213. Pushing block; 214. Export hole; 22. Screening cylinder; 221. Through hole; 23. Fixed block; 24. Support block; 25. Telescopic rod; 26. Fixed column; 27. Ring; 271. Limiting rod; 272. Elastic member; 28. Connecting block; 281. Movable rod; 29. Arc plate; 31. Driving member; 32. Crankshaft; 33. Push rod; 34. Positioning block; 341. Guide groove; 342. Slide block; 343. Driving rod; 344. Protective rod; 35. Adjusting block; 36. Connecting rod; 37. Adjusting rod; 38. Movable block; 39. Conveying block; 391. Feed hole; 392. Hole. Detailed implementation manners

[0037] 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 of 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.

[0038] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. These terms are 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. Therefore, they should not be construed as limiting the present invention. The terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Embodiment: Please refer to Figures 1-9 , a plasma pulverized coal burner, including a base 1. A pushing assembly 3 is arranged at the upper end of the base 1. The pulverized coal is pushed to a specified position through the pushing assembly 3, and a protective plate 11 is arranged at the edge part of the upper end of the base 1.

[0040] In this solution, the pulverized coal is pushed into the burner through the pushing assembly 3. When the burner is in use, an appropriate amount of pulverized coal is stored inside it, so that it burns fully.

[0041] Further, a pressing assembly 2 is assembled at the upper end of the pushing assembly 3 and is used for further screening the pulverized coal. Among them, the pressing assembly 2 includes a column 21. A screening cylinder 22 is arranged at the end of the column 21. Fixed blocks 23 are arranged on the inner wall of the screening cylinder 22, and the ends of the fixed blocks 23 penetrate and extend to the outside of the screening cylinder 22 and are connected to the ends of the column 21.

[0042] In this embodiment, a device with power output such as a motor is arranged in the inner cavity of the column 21 and is connected to an external control device. At the same time, the output end of the motor is connected to the fixed block 23. Thus, when the motor is started, the fixed block 23 is synchronously driven to rotate.

[0043] The control device can select a single-chip microcomputer as the control end. In this embodiment, the single-chip microcomputer is a typical embedded microcontroller (Micro controller Unit), which is composed of an arithmetic unit, a controller, a memory, input and output devices, etc., and is equivalent to a miniature computer. Compared with the general-purpose microprocessor applied in a personal computer, it emphasizes more on self-supply (without external hardware) and cost saving. Its greatest advantage is its small size and can be placed inside the instrument, but its storage capacity is small, the input and output interfaces are simple, and the function consumption is low.

[0044] Further, a support block 24 is provided at one end of the fixing block 23 away from the column 21. A plurality of telescopic rods 25 are slidably mounted on the outer surface of the support block 24, and the plurality of telescopic rods 25 are evenly distributed on the outer surface of the support block 24. At the same time, the end of the telescopic rod 25 penetrates and extends into the interior of the support block 24.

[0045] Specifically, when the fixing block 23 rotates, it synchronously drives the support block 24 to rotate, so that the telescopic rod 25 provided on the support block 24 rotates around the fixing block 23. A slot is provided on the outer surface of the support block 24, and the outer surface of the telescopic rod 25 is slidably connected to the inner wall of the slot. At the same time, a baffle is provided at one end of the telescopic rod 25 in the inner cavity of the support block 24, and the telescopic rod 25 is protected by the baffle, thereby ensuring the overall stability of the telescopic rod 25.

[0046] Further, a fixing column 26 is provided at one end of the support block 24 away from the fixing block 23. A circular ring 27 is slidably mounted on the outer surface of the fixing column 26. A limiting rod 271 corresponding to the telescopic rod 25 is rotatably mounted on the outer surface of the circular ring 27. A connecting block 28 corresponding to the limiting rod 271 is rotatably mounted on the outer surface of the fixing column 26. An end of the connecting block 28 is rotatably mounted with a movable rod 281, and one end of the limiting rod 271 away from the circular ring 27 is rotatably connected to the outer surface of the movable rod 281.

[0047] Specifically, when the circular ring 27 moves, it synchronously drives the limiting rod 271 to move. Since the end of the limiting rod 271 is rotatably connected to the outer surface of the movable rod 281, when the limiting rod 271 moves, it drives the movable rod 281 to rotate around the connecting block 28, and then the end of the movable rod 281 slowly expands outwards.

[0048] Further, an arc-shaped plate 29 is rotatably mounted at one end of the movable rod 281 away from the connecting block 28. The inner wall of the arc-shaped plate 29 is connected to the end of the telescopic rod 25. The outer surface of the arc-shaped plate 29 is attached to the inner wall of the screening cylinder 22. At the same time, an elastic member 272 is sleeved on the outer surface of the fixing column 26, and one end of the elastic member 272 is connected to the connecting block 28 and the other end is connected to the end of the circular ring 27. A collecting plate 211 is provided at one end of the column 21, and the collecting plate 211 is located at the lower end of the screening cylinder 22.

[0049] Specifically, when the movable rod 281 moves, it drives the arc-shaped plate 29 rotatably mounted at its end to move, so that the arc-shaped plate 29 is tightly pressed against the inner wall of the screening cylinder 22 and rotates with the fixing block 23, thereby further screening the pulverized coal in the screening cylinder 22, preventing the pulverized coal from caking, and at the same time making it fall onto the collecting plate 211.

[0050] The elastic member 272 is an elastic component such as a spring, which is used to limit the circular ring 27 so that the circular ring 27 is always in a taut state and presses the arc-shaped plate 29 against the inner wall of the screening cylinder 22.

[0051] Furthermore, sliding grooves 212 are symmetrically formed in the inner wall of the collecting plate 211, a pushing block 213 is slidably mounted on the inner wall of the sliding groove 212, and a lead-out hole 214 is formed in the inner wall of the collecting plate 211. A through hole 221 is formed in the upper end of the outer surface of the screening cylinder 22.

[0052] Specifically, a magnetic block is provided at the lower end of the pushing block 213, and the pulverized coal falling on the collecting plate 211 is pushed to the lead-out hole 214 by the pushing block 213, so that it falls inside the pushing assembly 3, facilitating the pushing of the pulverized coal.

[0053] Furthermore, the pushing assembly 3 includes a driving member 31 connected to the protective plate 11. The output end of the driving member 31 penetrates and extends into the protective plate 11. At the same time, a crankshaft 32 is provided at the output end of the driving member 31, and a pair of push rods 33 are rotatably mounted on the outer surface of the crankshaft 32.

[0054] In this embodiment, the driving member 31 is a device with power output such as a motor and is connected to an external control device. When the driving member 31 is started, the crankshaft 32 provided at its output end is synchronously driven to rotate. When the crankshaft 32 rotates, the two push rods 33 are driven to reciprocate, and the two push rods 33 alternately expand and contract.

[0055] Furthermore, a positioning block 34 is provided at the upper end of the base 1. Guide grooves 341 are symmetrically formed in the inner cavity of the positioning block 34, and a slider 342 is slidably mounted on the inner wall of the guide groove 341. One end of the slider 342 is rotatably connected to the push rod 33.

[0056] Specifically, when the push rod 33 moves, the slider 342 is driven to move on the guide groove 341. The slider 342 is limited by the guide groove 341, so that when the slider 342 moves, it is always in a stable state, avoiding the situation that the slider 342 falls off during movement.

[0057] Furthermore, a driving rod 343 is provided at the end of the slider 342 away from the push rod 33, and an adjusting block 35 is provided at the end of the driving rod 343. A protective rod 344 is rotatably mounted on one side of the slider 342, and the end of the protective rod 344 away from the slider 342 is rotatably connected to the symmetrically arranged adjusting block 35.

[0058] Specifically, when the slider 342 moves, the driving rod 343 is driven to move. At the same time, the protective rod 344 rotatably mounted on the side of the slider 342 is driven to move. The adjusting block 35 is moved by the protective rod 344 and the driving rod 343, so that when the adjusting block 35 moves, the whole remains stable.

[0059] Further, a connecting rod 36 is provided at the upper end of the adjusting block 35, and the upper end of the connecting rod 36 is slidably connected to the lower end of the collecting plate 211.

[0060] Specifically, when the adjusting block 35 moves, the connecting rod 36 can be driven to move synchronously. A magnetic block is provided at the upper end of the connecting rod 36. After the connecting rod 36 is attached to the collecting plate 211, the magnetic block on the connecting rod 36 and the magnetic block at the lower end of the pushing block 213 are attracted to each other. Thus, when the connecting rod 36 moves, the pushing block 213 can be driven to move synchronously, so as to push the pulverized coal.

[0061] Further, a conveying block 39 is provided at the upper end of the base 1 and on one side of the positioning block 34. A hole 392 is formed through one end of the conveying block 39. At the same time, a feed hole 391 is formed at the upper end of the conveying block 39, and the feed hole 391 is located at the lower end of the outlet hole 214.

[0062] Specifically, when the pulverized coal on the collecting plate 211 enters the feed hole 391, it evenly enters the inside of the conveying block 39 and enters the burner along the hole 392.

[0063] Further, a movable block 38 is slidably installed on the inner wall of the hole 392. An adjusting rod 37 is provided at the end of the movable block 38, and the end of the adjusting rod 37 is connected to the adjusting block 35.

[0064] Specifically, the movable block 38 is integrally cylindrical, and an annular groove is formed on the outer surface of the movable block 38. The pulverized coal is collected through the annular groove and pushed into the burner along the hole 392, which is convenient for the use of the burner and ensures the normal operation of the burner.

[0065] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of the claims of the present invention.

Claims

1. A plasma pulverized coal burner, characterized in that, It includes a base (1), at the upper end of the base (1) there is a pushing component (3) for pushing pulverized coal to a specified position, and at the edge part of the upper end of the base (1) there is a protective plate (11); A pressing component (2) is assembled at the upper end of the pushing component (3) for further screening of the pulverized coal; Among them, the pressing component (2) includes a column (21), at the end of the column (21) there is a screening cylinder (22), on the inner wall of the screening cylinder (22) there is a fixing block (23), and the end of the fixing block (23) penetrates and extends to the outside of the screening cylinder (22) and is connected to the end of the column (21); At one end of the fixing block (23) away from the column (21) there is a support block (24), on the outer surface of the support block (24) there are multiple telescopic rods (25) slidably installed, and multiple groups of the telescopic rods (25) are evenly distributed on the outer surface of the support block (24), and at the same time the end of the telescopic rod (25) penetrates and extends into the support block (24); At one end of the support block (24) away from the fixing block (23) there is a fixing column (26), on the outer surface of the fixing column (26) there is a ring (27) slidably installed, on the outer surface of the ring (27) there is a limiting rod (271) rotatably installed corresponding to the telescopic rod (25), on the outer surface of the fixing column (26) there is a connecting block (28) rotatably installed corresponding to the limiting rod (271), at the end of the connecting block (28) there is a movable rod (281) rotatably installed, and at the end of the limiting rod (271) away from the ring (27) it is rotatably connected to the outer surface of the movable rod (281); At the end of the movable rod (281) away from the connecting block (28) there is an arc-shaped plate (29) rotatably installed, the inner wall of the arc-shaped plate (29) is connected to the end of the telescopic rod (25), the outer surface of the arc-shaped plate (29) is in contact with the inner wall of the screening cylinder (22), and at the same time there is an elastic member (272) sleeved on the outer surface of the fixing column (26), and one end of the elastic member (272) is connected to the connecting block (28) and the other end is connected to the end of the ring (27); At one end of the column (21) there is a collecting plate (211), and the collecting plate (211) is located at the lower end of the screening cylinder (22).

2. The plasma pulverized coal burner according to claim 1, characterized in that, On the inner wall of the collecting plate (211) there are symmetrically arranged sliding grooves (212), and on the inner wall of the sliding grooves (212) there is a pushing block (213) slidably installed, and at the same time there is a lead-out hole (214) opened on the inner wall of the collecting plate (211).

3. The plasma pulverized coal burner according to claim 1, wherein At the upper end of the outer surface of the screening cylinder (22) there is a through hole (221).

4. The plasma pulverized coal burner according to claim 2, characterized in that, The pushing component (3) includes a driving member (31) connected to the protective plate (11), the output end of the driving member (31) penetrates and extends into the protective plate (11), and at the same time at the output end of the driving member (31) there is a crankshaft (32), and on the outer surface of the crankshaft (32) there are a pair of push rods (33) rotatably installed.

5. The plasma pulverized coal burner according to claim 4, characterized in that, A positioning block (34) is provided at the upper end of the base (1). Guide grooves (341) are symmetrically formed in the inner cavity of the positioning block (34). A slider (342) is slidably mounted on the inner wall of the guide groove (341). One end of the slider (342) is rotatably connected to the push rod (33).

6. The plasma pulverized coal burner according to claim 5, characterized in that, A drive rod (343) is provided at the end of the slider (342) away from the push rod (33). An adjustment block (35) is provided at the end of the drive rod (343).

7. The plasma pulverized coal burner according to claim 6, characterized in that, A protective rod (344) is rotatably mounted on one side of the slider (342). The end of the protective rod (344) away from the slider (342) is rotatably connected to the symmetrically arranged adjustment blocks (35).

8. A plasma pulverized coal burner according to claim 7, characterized in that, A connecting rod (36) is provided at the upper end of the adjustment block (35). The upper end of the connecting rod (36) is slidably connected to the lower end of the collection plate (211).

9. The plasma pulverized coal burner according to claim 8, characterized in that, A conveying block (39) is provided at the upper end of the base (1) and on one side of the positioning block (34). A hole (392) is formed through one end of the conveying block (39). At the same time, a feed hole (391) is formed at the upper end of the conveying block (39). The feed hole (391) is located at the lower end of the discharge hole (214).

10. The plasma pulverized coal burner according to claim 9, characterized in that, A movable block (38) is slidably mounted on the inner wall of the hole (392). An adjustment rod (37) is provided at the end of the movable block (38). The end of the adjustment rod (37) is connected to the adjustment block (35).

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