Pulverized coal combustion-supporting injection type combustor and combustion-supporting process thereof

Abstract

The invention relates to a pulverized coal combustion-supporting injection type combustor and a combustion-supporting process thereof. The pulverized coal combustion-supporting injection type combustor comprises a base, a primary air pipe and a secondary air pipe, a rotating baffle is rotationally mounted in the secondary air pipe; a boosting structure, a conduction structure and a corner structure are arranged on the base; the conducting structure comprises a plurality of groups of blocking plates arranged on the air inlet pipe; the boosting structure is connected with the conduction structure and the rotating structure through an induction structure; the sensing structure is used for sensing power of the boosting structure; when the power of the boosting structure is increased or decreased, the induction structure can drive the conduction structure to act so as to increase or decrease the conduction area of the air inlet pipe; the rotation angle structure is driven to act so as to increase or decrease the inclination angle of the rotation baffle; through mutual cooperation of the boosting structure, the induction structure, the conduction structure and the corner structure, dynamic balance of pulverized coal air, combustion-supporting gas and rotational flow strength can be achieved, the utilization efficiency of energy is further improved, and combustion can be conducted relatively stably.

Description

Technical Field

[0001] This invention relates to the technical field, specifically to a pulverized coal combustion-assisted injection burner and its combustion-assisted process. Background Technology

[0002] Pulverized coal-assisted combustion jet burners are devices that enhance combustion by injecting pulverized coal through a high-speed airflow. They are widely applicable to various dry-process and wet-process rotary kilns for cement, sintering and pelletizing rotary kilns for iron and steel, lime rotary kilns, various chemical rotary kilns, alumina clinker rotary kilns, and power plant boilers. Due to their high-efficiency combustion and low energy consumption, pulverized coal burners perform exceptionally well in these applications, effectively improving combustion efficiency and thermal utilization.

[0003] A pulverized coal-assisted combustion jet burner mainly includes a primary air duct, a secondary air duct, an inlet pipe, and a combustion chamber. Pulverized coal is carried by the airflow and ejected outwards from the primary air duct at a certain diffusion angle. The combustion-supporting gas, after passing through the secondary air duct, generates a swirling airflow, which mixes with the ejected pulverized coal airflow and propels it forward at high speed in a spiral motion. This results in more complete combustion and also acts as a flow stabilizer, ultimately forming a stable combustion flame.

[0004] In common burners, the pulverized coal air intake and the combustion air intake are matched. When high-power combustion is required, the burner state is adjusted, and the pulverized coal air intake increases accordingly, as does the combustion air intake, to meet the usage requirements. When low-power combustion is required, the burner state is adjusted, and the pulverized coal air intake decreases accordingly, as does the combustion air intake, to prevent excessive combustion air from extinguishing the flame. Burners with adjustable combustion states are better suited for daily production use.

[0005] Because the angle of the baffle plate inside a typical secondary air duct is fixed, an increase or decrease in the amount of combustion-supporting gas entering per unit time will correspondingly increase or decrease the flow velocity of the combustion-supporting gas. This will change the swirling intensity generated by the combustion-supporting gas after passing through the secondary air duct. That is, during high-power combustion, the swirling intensity formed by the combustion-supporting gas after passing through the secondary air duct will increase; conversely, the swirling intensity will decrease. When the swirling intensity is affected by the gas flow velocity, it may be higher than the usage requirements, causing the flame to shrink and the high-temperature zone to concentrate near the burner outlet, which will accelerate the corrosion of the pipe wall; or it may be lower than the usage requirements, resulting in insufficient mixing of pulverized coal and air, and a long and dim flame, which is not conducive to the efficient utilization of energy. Summary of the Invention

[0006] The purpose of this invention is to provide a pulverized coal combustion-assisted injection burner and its combustion-assisted process to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A pulverized coal combustion-assisted injection burner includes a base; a combustion chamber, a pulverized coal pipeline, and an air inlet pipe are installed on the base;

[0009] A primary air duct is installed at the bottom of the combustion chamber; the pulverized coal pipeline is fixedly and sealed to the primary air duct.

[0010] The combustion chamber is equipped with multiple sets of symmetrically arranged secondary air ducts and tertiary air ducts; and the secondary air ducts and tertiary air ducts are arranged sequentially along the coal powder injection direction;

[0011] Multiple sets of rotating baffles are rotatably installed inside the secondary air duct; multiple sets of fixed baffles are installed inside the tertiary air duct.

[0012] The base is equipped with a booster structure, a conduction structure, and a corner structure.

[0013] The booster structure includes a first fixed block and a second fixed block disposed inside the pulverized coal pipeline; a first fan blade is installed on the first fixed block; multiple sets of second fan blades are installed on the second fixed block; and the first fan blade and the second fan blade are both inclined and in opposite directions.

[0014] When the booster structure is activated, it can drive the first fixed block and the second fixed block to rotate, thereby driving the first fan blade and the second fan blade to rotate in opposite directions, so as to mix the coal powder and accelerate the flow speed of the coal powder.

[0015] The conductive structure includes multiple sets of sealing plates disposed on the intake pipe; the sealing plates cooperate with each other;

[0016] The booster structure is connected to the conduction structure and the rotation structure via an induction structure; the induction structure is used to sense the power of the booster structure.

[0017] Furthermore, when the power of the booster structure increases or decreases, the rotational speed of the first and second fan blades will increase or decrease. The sensing structure can drive the conduction structure to move, thereby driving the sealing plate to rotate, so as to increase or decrease the conduction area of ​​the air intake pipe; and drive the corner structure to move, so as to drive the rotating baffle to rotate, thereby increasing or decreasing the tilt angle of the rotating baffle.

[0018] As a further embodiment of the present invention: the booster structure further includes a main rotating shaft rotatably mounted on the base, and the main rotating shaft is connected to the output end of the drive device; the main rotating shaft is connected to the first fixed block; a first bevel gear is mounted on the main rotating shaft; a rotating sleeve is sleeved on the main rotating shaft; the rotating sleeve is connected to the second fixed block; a third bevel gear is mounted on the rotating sleeve; multiple sets of symmetrically arranged guide rods are rotatably mounted on the base; a second bevel gear that meshes with both the first bevel gear and the third bevel gear is mounted on one end of each guide rod.

[0019] As a further embodiment of the present invention: the sensing structure includes a turntable mounted on the guide rod; multiple sets of centrifugal blocks are slidably fitted on the turntable; an inclined telescopic column is mounted on the centrifugal block; a movable sleeve is sleeved on the guide rod; multiple sets of telescopic sleeves that are fixedly installed and inclinedly fitted with the telescopic column are fixedly installed on the movable sleeve; a connecting rod that abuts against the movable sleeve is slidably fitted on the guide rod; a spring is sleeved on the guide rod; the two ends of the spring abut against the connecting rod and the guide rod respectively.

[0020] As a further embodiment of the present invention: the sensing structure further includes multiple sets of first worm gears and linkage shafts rotatably mounted on the base; the first worm gears are provided with helical grooves; the linkage shafts are provided with inclined grooves; a first sleeve and a second sleeve are respectively installed at both ends of the connecting rod; a first protruding post is installed on the first sleeve and slides into the helical groove; a second protruding post is installed on the second sleeve and slides into the inclined groove.

[0021] As a further embodiment of the present invention: the guiding structure further includes a first worm gear rotatably mounted on the intake pipe, and the first worm gear meshes with the first worm; the first worm gear has multiple sets of sliding grooves; the sealing plate is equipped with protruding posts that slide and engage with the sliding grooves.

[0022] As a further embodiment of the present invention: the corner structure includes a second worm gear rotatably mounted on the combustion chamber; the second worm gear is connected to the linkage shaft via a bevel gear set; a second worm wheel meshing with the second worm gear is rotatably mounted on the secondary air duct; a fifth bevel gear is installed inside the second worm wheel; and a fourth bevel gear meshing with the fifth bevel gear is installed at one end of the rotating baffle.

[0023] As a further embodiment of the present invention: the primary air duct is frustoconical in shape, and its diameter gradually decreases along the direction of coal powder flow.

[0024] As a further aspect of the present invention, the inner sides of both the primary air duct and the pulverized coal pipe are coated with ceramic or basalt cast stone to reduce wear and tear.

[0025] As a further aspect of the present invention: both the first fan blade and the second fan blade have asymmetrical blade structures.

[0026] A combustion-supporting process for a pulverized coal combustion-assisted injection burner as described in any of the above claims, comprising the following steps:

[0027] Step 1: Start the drive unit to assist the structure in moving and accelerate the rate at which pulverized coal is injected into the combustion chamber through the primary air duct in the pulverized coal pipeline. The first and second fan blades rotate in opposite directions to shear the fluid, making the gas and solid phases uniform.

[0028] Step 2: The sensing structure senses the operating power of the booster structure in real time and controls the operation of the conduction structure and the cornering structure.

[0029] Step 3: The action of the guiding structure causes the sealing plate to rotate, increasing or decreasing the guiding area of ​​the air inlet pipe, controlling the amount of combustion-supporting gas injected upward from the secondary and tertiary air pipes; matching the amount of pulverized coal injected, thus improving combustion efficiency.

[0030] Step 4: The corner structure moves and rotates the baffle, increasing or decreasing the tilt angle, changing the swirling intensity, optimizing the mixing rate of pulverized coal, air and combustion-supporting gas, stabilizing the flame, and controlling the generation of pollutants.

[0031] Compared with the prior art, the beneficial effects of this invention are as follows: The booster structure drives the first and second fan blades to rotate in opposite directions, enabling the pulverized coal and air to flow rapidly in the same direction. Furthermore, when the two sets of fan blades rotate in opposite directions, their angular momentum cancels each other out (Newton's third law), eliminating the need for an additional balancing device. The two sets of fan blades cut the fluid into micro-particles, achieving molecular-level mixing through laminar shearing and turbulent diffusion. The fan blades also push the material to form axial and radial circulating flows, eliminating dead zones. Therefore, the booster structure also ensures more uniform mixing of pulverized coal and air, thereby improving combustion efficiency. Through the coordinated operation of the booster structure, induction structure, conduction structure, and corner structure, combustion can be maintained in an orderly manner under different combustion conditions, ensuring complete combustion of fuel and avoiding energy waste. Moreover, it can achieve a dynamic balance between pulverized coal and air, combustion-supporting gas, and swirl intensity, further improving energy utilization efficiency and enabling relatively stable combustion. Attached Figure Description

[0032] Figure 1 A schematic diagram of an embodiment of a jet burner for pulverized coal combustion and its combustion-aiding process.

[0033] Figure 2 A schematic diagram of another perspective of an embodiment of a jet burner for pulverized coal combustion and its combustion-aiding process.

[0034] Figure 3 for Figure 2 A schematic diagram of the structure at point A in the middle.

[0035] Figure 4 A schematic diagram of the primary air duct structure in one embodiment of a jet burner for pulverized coal combustion and its combustion-aiding process.

[0036] Figure 5 for Figure 4 A structural schematic diagram from a partial cross-sectional view.

[0037] Figure 6 A schematic diagram of the booster structure in one embodiment of a jet burner for pulverized coal combustion and its combustion-aiding process.

[0038] Figure 7 A schematic diagram of the connecting rod in one embodiment of a jet burner for pulverized coal combustion and its combustion-aiding process.

[0039] Figure 8 A schematic diagram of the secondary air duct in one embodiment of a jet burner for pulverized coal combustion and its combustion-aiding process.

[0040] Figure 9 A schematic diagram of the rotating baffle in one embodiment of a jet burner for pulverized coal combustion and its combustion-aiding process.

[0041] Figure 10 A schematic diagram of the tertiary air duct structure in one embodiment of a jet burner for pulverized coal combustion and its combustion-aiding process.

[0042] In the picture: 1. Base;

[0043] 2. Combustion chamber;

[0044] 3. Pulverized coal pipeline;

[0045] 4. Primary air duct;

[0046] 5. Air intake pipe;

[0047] 6. Secondary air ducts;

[0048] 7. Tertiary air duct; 701. Fixed baffle;

[0049] 8. Main shaft; 801. First bevel gear;

[0050] 9. First fixing block; 901. First fan blade;

[0051] 10. Second bevel gear;

[0052] 11. Rotate the sleeve; 1101. Third bevel gear;

[0053] 12. Second fixing block; 1201. Second fan blade;

[0054] 13. Turntable; 1301. Centrifugal block; 1302. Telescopic column;

[0055] 14. Moving sleeve; 1401. Telescopic sleeve;

[0056] 15. Connecting rod;

[0057] 16. First sleeve; 1601. First protruding post;

[0058] 17. First worm gear; 1701. Spiral groove;

[0059] 18. First worm gear; 1801. Slide groove;

[0060] 19. Sealing plate; 1901. Protruding column;

[0061] 20. Second sleeve; 2001. Second protruding post;

[0062] 21. Spring;

[0063] 22. Guide rod;

[0064] 23. Linkage shaft; 2301. Inclined groove;

[0065] 24. Second worm gear;

[0066] 25. Rotate the baffle; 2501. Fourth bevel gear;

[0067] 26. Second worm gear; 2601. Fifth bevel gear. Detailed Implementation

[0068] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0069] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0070] Please see Figures 1-10In this embodiment of the invention, a pulverized coal combustion-assisted injection burner includes a base 1; a combustion chamber 2, a pulverized coal pipeline 3, and an air inlet pipe 5 are installed on the base 1.

[0071] A primary air duct 4 is installed at the bottom of the combustion chamber 2; the pulverized coal pipe 3 is fixedly and sealed to the primary air duct 4.

[0072] Multiple sets of symmetrically arranged secondary air ducts 6 and tertiary air ducts 7 are installed on the combustion chamber 2; and the secondary air ducts 6 and tertiary air ducts 7 are arranged sequentially along the coal powder injection direction.

[0073] Multiple sets of rotating baffles 25 are rotatably installed inside the secondary air duct 6; multiple sets of fixed baffles 701 are installed inside the tertiary air duct 7.

[0074] The base 1 is provided with a booster structure, a conduction structure and a corner structure;

[0075] The booster structure includes a first fixing block 9 and a second fixing block 12 disposed inside the pulverized coal pipe 3; a first fan blade 901 is installed on the first fixing block 9; multiple sets of second fan blades 1201 are installed on the second fixing block 12; and the first fan blade 901 and the second fan blade 1201 are both inclined and in opposite directions.

[0076] When the booster structure is activated, it can drive the first fixed block 9 and the second fixed block 12 to rotate, thereby driving the first fan blade 901 and the second fan blade 1201 to rotate in opposite directions, so as to mix the coal powder and accelerate the flow speed of the coal powder.

[0077] The conduction structure includes multiple sets of sealing plates 19 disposed on the air intake pipe 5; the sealing plates 19 cooperate with each other;

[0078] The booster structure is connected to the conduction structure and the rotation structure via an induction structure; the induction structure is used to sense the power of the booster structure.

[0079] Furthermore, when the power of the booster structure increases or decreases, the rotational speed of the first fan blade 901 and the second fan blade 1201 will increase or decrease. The sensing structure can drive the conduction structure to move, thereby driving the sealing plate 19 to rotate, so as to increase or decrease the conduction area of ​​the air intake pipe 5; and drive the corner structure to move, so as to drive the rotating baffle 25 to rotate, thereby increasing or decreasing the tilt angle of the rotating baffle 25.

[0080] Taking the embodiment combining all the features described in this application as an example, in use, the pulverized coal pipeline 3 is sealed and connected to the pulverized coal air generator; the pulverized coal air enters through the pulverized coal pipeline 3, passes through the primary air duct 4 and enters the combustion chamber 2, and is ignited by the ignition device;

[0081] The intake pipe 5 is sealed and connected to the combustion air storage tank; and the flow rate of the combustion gas is proportional to the conduction area of ​​the intake pipe 5; the combustion air enters the combustion chamber 2 through the secondary air pipe 6 and the tertiary air pipe 7, and when the combustion air passes through the secondary air pipe 6 and the tertiary air pipe 7, it forms a spiral airflow under the direction-changing action of the rotating baffle 25 and the fixed baffle 701; its function is: the centrifugal effect of the rotating airflow causes an axial pressure gradient, forming a low-pressure recirculation zone, entraining high-temperature flue gas, and maintaining flame stability; the swirling flow induces shear layer instability, increases turbulence intensity, and accelerates the mixing of pulverized coal air and combustion gas; the spiral flow channel extends the airflow path to ensure complete combustion of fuel.

[0082] Secondary air duct 6 is used for combustion support; tertiary air duct 7 is used to increase the length of the tail flame to reduce energy loss.

[0083] The booster structure drives the first fan blade 901 and the second fan blade 1201 to rotate, thereby increasing the coal powder air flow speed and replenishing the coal powder consumed in the combustion chamber 2 in a timely manner. By increasing the flow speed, the speed at which coal powder air diffuses in the combustion chamber 2 can be effectively reduced, thereby stabilizing the flame.

[0084] Since the first blade 901 and the second blade 1201 are tilted in opposite directions, when the first blade 901 and the second blade 1201 rotate in opposite directions, the pulverized coal and air can flow rapidly in the same opposite direction. When the two sets of blades rotate in opposite directions, their angular momentum cancels each other out (Newton's third law), and the system does not require an additional balancing device. The two sets of blades cut the fluid into micro-particles, and achieve molecular-level mixing through laminar shearing and turbulent diffusion. The blades also push the material to form axial and radial circulating flow, eliminating dead zones. Therefore, the booster structure can also make the pulverized coal and air mix more evenly, thereby improving combustion efficiency.

[0085] Depending on production requirements or processes, the power of the booster structure can be adjusted to increase or decrease the pulverized coal air injection efficiency, thereby controlling the flame state within combustion chamber 2.

[0086] When the power of the booster structure decreases, the sensing structure can sense the real-time status of the booster structure. When the power decreases, the rotation speed of the first blade 901 and the second blade 1201 decreases, which reduces the flow speed of the pulverized coal air, that is, the amount of pulverized coal air entering the combustion chamber 2 per unit time decreases, and the combustion state is lower.

[0087] At this time, the sensing structure will drive the conduction structure to rotate the sealing plate 19, and multiple sets of sealing plates 19 will rotate and move closer to each other, thereby reducing the conduction area of ​​the intake pipe 5, thereby reducing the flow of combustion air, avoiding excessive combustion air entering the combustion chamber 2 under low-power combustion conditions, making the combustion state difficult to control, and reducing energy consumption.

[0088] At the same time, the sensing structure will drive the corner structure to move, thereby causing the rotating baffle 25 to rotate, so as to reduce the tilt angle of the rotating baffle 25.

[0089] The tilt angle of the rotating baffle 25 is proportional to the swirl number. By increasing the tilt angle to increase the swirl number, a relatively strong swirling air can still be generated when the amount of combustion-supporting gas is reduced, thereby ensuring that the pulverized coal and air are fully combusted.

[0090] Through the coordinated operation of the booster structure, induction structure, conduction structure, and corner structure, combustion can be maintained in an orderly manner under different combustion conditions, ensuring that the fuel can be fully burned and avoiding energy waste. Furthermore, it can achieve a dynamic balance between pulverized coal air, combustion-supporting gas, and swirl intensity, further improving energy utilization efficiency and enabling combustion to proceed relatively stably.

[0091] In another embodiment of the present invention, the booster structure further includes a main rotating shaft 8 rotatably mounted on the base 1, and the main rotating shaft 8 is connected to the output end of the drive device; the main rotating shaft 8 is connected to the first fixing block 9; a first bevel gear 801 is mounted on the main rotating shaft 8; a rotating sleeve 11 is sleeved on the main rotating shaft 8; the rotating sleeve 11 is connected to the second fixing block 12; a third bevel gear 1101 is mounted on the rotating sleeve 11; a plurality of symmetrically arranged guide rods 22 are rotatably mounted on the base 1; a second bevel gear 10 that meshes with both the first bevel gear 801 and the third bevel gear 1101 is mounted on one end of the guide rod 22.

[0092] Taking the embodiment combining all the features described in this application as an example, when the drive device is activated, it will drive the main rotating shaft 8 to rotate, thereby driving the first fixed block 9 and the first bevel gear 801 to rotate.

[0093] When the first bevel gear 801 rotates, it will drive the second bevel gear 10 to rotate through meshing, and then drive the third bevel gear 1101 to rotate through meshing, thereby driving the rotating sleeve 11 to rotate, which in turn drives the second fixed block 12 to rotate. The rotation directions of the first fixed block 9 and the second fixed block 12 are opposite, so that the first fan blade 901 and the second fan blade 1201 rotate in opposite directions.

[0094] When the second bevel gear 10 rotates, it will drive the guide rod 22 to rotate, thereby sensing the movement of the structure. The rotation speed of the second bevel gear 10 is the same as the rotation speed of the guide rod 22, and is proportional to the rotation speed of the main shaft 8.

[0095] The booster structure drives the first fan blade 901 and the second fan blade 1201 to rotate, thereby increasing the coal powder air flow speed and replenishing the coal powder consumed in the combustion chamber 2 in a timely manner. By increasing the flow speed, the speed at which coal powder air diffuses in the combustion chamber 2 can be effectively reduced, thereby stabilizing the flame.

[0096] Since the first blade 901 and the second blade 1201 are tilted in opposite directions, when the first blade 901 and the second blade 1201 rotate in opposite directions, the pulverized coal and air can flow rapidly in the same opposite direction. When the two sets of blades rotate in opposite directions, their angular momentum cancels each other out (Newton's third law), and the system does not require an additional balancing device. The two sets of blades cut the fluid into micro-particles, and achieve molecular-level mixing through laminar shearing and turbulent diffusion. The blades also push the material to form axial and radial circulating flow, eliminating dead zones. Therefore, the booster structure can also make the pulverized coal and air mix more evenly, thereby improving combustion efficiency.

[0097] In another embodiment of the present invention, the sensing structure includes a turntable 13 mounted on the guide rod 22; a plurality of centrifugal blocks 1301 are slidably fitted on the turntable 13; an inclined telescopic column 1302 is mounted on the centrifugal block 1301; a movable sleeve 14 is sleeved on the guide rod 22; a plurality of telescopic sleeves 1401 are fixedly mounted on the movable sleeve 14 and inclinedly fitted with the telescopic column 1302; a connecting rod 15 is slidably fitted on the guide rod 22 and abuts against the movable sleeve 14; a spring 21 is sleeved on the guide rod 22; the two ends of the spring 21 abut against the connecting rod 15 and the guide rod 22 respectively.

[0098] In another embodiment of the present invention, the sensing structure further includes multiple sets of first worm gears 17 and linkage shafts 23 rotatably mounted on the base 1; the first worm gears 17 are provided with spiral grooves 1701; the linkage shafts 23 are provided with inclined grooves 2301; a first sleeve 16 and a second sleeve 20 are respectively installed at both ends of the connecting rod 15; a first protruding post 1601 that slides and engages with the spiral grooves 1701 is installed on the first sleeve 16; a second protruding post 2001 that slides and engages with the inclined grooves 2301 is installed on the second sleeve 20.

[0099] Taking the embodiment combining all the features described in this application as an example, when in use, the guide rod 22 rotates, which drives the turntable 13 to rotate synchronously, thereby driving multiple sets of centrifugal blocks 1301 to rotate synchronously.

[0100] The rotating centrifugal block 1301 will slide on the turntable 13 under the action of centrifugal force, gradually moving away from the guide rod 22, and the sliding stroke is proportional to the rotation speed of the guide rod 22.

[0101] When the centrifugal block 1301 slides, it will drive the telescopic column 1302 to move synchronously. Under the limiting action of the telescopic sleeve 1401, the telescopic column 1302 will slide outward in the telescopic sleeve 1401, thereby driving the moving sleeve 14 to press the connecting rod 15 and drive the connecting rod 15 to move synchronously to compress the spring 21.

[0102] When the connecting rod 15 moves, it will drive the first sleeve 16 and the second sleeve 20 to move synchronously, thereby causing the first protruding post 1601 and the second protruding post 2001 to slide in the spiral groove 1701 and the inclined groove 2301 respectively.

[0103] When the first protruding post 1601 slides in the spiral groove 1701, it will squeeze the groove wall of the spiral groove 1701, thereby driving the first worm gear 17 to rotate, which in turn drives the conduction structure to move, thereby driving the sealing plate 19 to rotate; the sliding distance of the first protruding post 1601 in the spiral groove 1701 is proportional to the rotation angle of the first worm gear 17.

[0104] When the second protruding post 2001 slides in the inclined groove 2301, it will squeeze the groove wall of the inclined groove 2301, thereby driving the linkage shaft 23 to rotate, which in turn drives the corner structure to move, thereby driving the rotating baffle 25 to rotate; the rotation angle of the linkage shaft 23 is proportional to the sliding distance of the second protruding post 2001 in the inclined groove 2301.

[0105] Therefore, the higher the rotation speed of the main rotating shaft 8, the greater the rotation angle between the linkage rotating shaft 23 and the first worm gear 17, thereby controlling the position of the sealing plate 19 and the tilt angle of the rotating baffle 25.

[0106] Through the coordinated operation of the booster structure, induction structure, conduction structure, and corner structure, combustion can be maintained in an orderly manner under different combustion conditions, ensuring that the fuel can be fully burned and avoiding energy waste. Furthermore, it can achieve a dynamic balance between pulverized coal air, combustion-supporting gas, and swirl intensity, further improving energy utilization efficiency and enabling combustion to proceed relatively stably.

[0107] In another embodiment of the present invention, the conductive structure further includes a first worm gear 18 rotatably mounted on the intake pipe 5, and the first worm gear 18 meshes with the first worm 17; the first worm gear 18 has multiple sets of sliding grooves 1801; the sealing plate 19 is equipped with a protruding post 1901 that slides and engages with the sliding grooves 1801.

[0108] Taking the embodiment combining all the features described in this application as an example, when the first worm 17 rotates, it will drive the first worm wheel 18 to rotate through meshing, thereby driving the slide groove 1801 to rotate, so that the protruding column 1901 will slide in the slide groove 1801, and the sealing plate 19 will rotate through the squeezing action of the slide groove 1801 wall on the protruding column 1901, thereby increasing or decreasing the conduction area of ​​the air intake pipe 5 to control the flow of combustion-supporting gas.

[0109] When the power of the booster structure decreases, it will cause multiple sets of sealing plates 19 to rotate and move closer to each other, thereby reducing the conduction area of ​​the intake pipe 5, thus reducing the flow of combustion air, preventing excessive combustion air from entering the combustion chamber 2 under low-power combustion conditions, making the combustion state difficult to control, reducing energy consumption, and preventing the flame from being blown out.

[0110] When the booster structure power increases, it will cause multiple sets of sealing plates 19 to rotate away from each other, which can increase the conduction area of ​​the air intake pipe 5, thereby increasing the flow of combustion air and avoiding incomplete combustion of pulverized coal.

[0111] Furthermore, the meshing of the first worm 17 and the first worm wheel 18 can reduce the operating load of the sensing structure, thereby ensuring the normal operation of the sensing structure.

[0112] In another embodiment of the present invention, the corner structure includes a second worm gear 24 rotatably mounted on the combustion chamber 2; the second worm gear 24 is connected to the linkage shaft 23 via a bevel gear set; a second worm wheel 26 meshing with the second worm gear 24 is rotatably mounted on the secondary air duct 6; a fifth bevel gear 2601 is installed inside the second worm wheel 26; and a fourth bevel gear 2501 meshing with the fifth bevel gear 2601 is installed at one end of the rotating baffle 25.

[0113] Taking the embodiment combining all the features described in this application as an example, when the linkage shaft 23 rotates, it will drive the second worm 24 to rotate through the bevel gear set, thereby driving the second worm wheel 26 to rotate through the meshing action; and through the meshing action between the second worm 24 and the second worm wheel 26, the workload of the sensing structure can be effectively reduced to ensure that the device can operate normally.

[0114] The rotating second worm gear 26 will drive the fifth bevel gear 2601 to rotate, and through meshing, it will drive the fourth bevel gear 2501 to rotate, thereby driving the rotating baffle 25 to rotate.

[0115] When the booster structure is running at high power, the tilt angle of the rotating baffle 25 is small (the swirling intensity generated at this time meets the usage requirements). After the combustion gas passes through the secondary air duct 6, the spiral airflow generated can entrain high-temperature flue gas, maintain flame stability, and accelerate the mixing of pulverized coal, air and combustion gas.

[0116] When the booster structure is running at low power, the tilt angle of the rotating baffle 25 is larger, thereby enhancing the swirl intensity to maintain combustion.

[0117] In another embodiment of the present invention, the primary air duct 4 is frustoconical in shape, and its diameter gradually decreases along the direction of coal powder flow.

[0118] Taking the embodiment combining all the features described in this application as an example, when in use, after the pulverized coal air passes through the primary air duct 4, the inner wall of the gradually contracting primary air duct 4 increases the flow rate of the pulverized coal air, thereby delaying the diffusion time of the pulverized coal air and stabilizing the flame.

[0119] In another embodiment of the present invention, the inner sides of both the primary air duct 4 and the pulverized coal pipe 3 are coated with ceramic or basalt cast stone to reduce wear and tear.

[0120] Taking the embodiment combining all the features described in this application as an example, when in use, the high hardness of ceramic or basalt cast stone can increase the service life of the primary air duct 4 and the pulverized coal pipeline 3, thereby improving the service life of the device.

[0121] In another embodiment of the present invention, both the first fan blade 901 and the second fan blade 1201 are asymmetrical blade structures.

[0122] Taking the embodiment combining all the features described in this application as an example, when used, more precise flow field and combustion control can be achieved by differentiating the geometric parameters or spatial distribution of the fan blades.

[0123] A combustion-supporting process for a pulverized coal combustion-assisted injection burner as described above includes the following steps:

[0124] Step 1: Start the drive device, boost the structure to move, and accelerate the rate at which the coal powder in the coal powder pipeline (3) is injected into the combustion chamber (2) through the primary air pipe (4). The first fan blade (901) and the second fan blade (1201) rotate in opposite directions to shear the fluid, so that the gas and solid phases are uniform.

[0125] Step 2: The sensing structure senses the operating power of the booster structure in real time and controls the operation of the conduction structure and the cornering structure.

[0126] Step 3: The action of the guiding structure causes the sealing plate (19) to rotate, increasing or decreasing the guiding area of ​​the air inlet pipe (5), and controlling the amount of combustion-supporting gas injected upward from the secondary air pipe (6) and the tertiary air pipe (7); matching the amount of coal powder injected, and improving combustion efficiency;

[0127] Step 4: The corner structure moves and rotates the baffle (25), increasing or decreasing the tilt angle, changing the swirling intensity, optimizing the mixing rate of pulverized coal, air and combustion-supporting gas, stabilizing the flame, and controlling the generation of pollutants.

[0128] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0129] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pulverized coal combustion-assisted injection burner, comprising a base (1); a combustion chamber (2), a pulverized coal pipeline (3), and an air inlet pipe (5) are installed on the base (1); Its features are, A primary air duct (4) is installed at the bottom of the combustion chamber (2); the pulverized coal pipe (3) is fixedly and sealed to the primary air duct (4); Multiple sets of symmetrically arranged secondary air ducts (6) and tertiary air ducts (7) are installed on the combustion chamber (2); and the secondary air ducts (6) and the tertiary air ducts (7) are arranged sequentially along the coal powder injection direction; Multiple sets of rotating baffles (25) are rotatably installed inside the secondary air duct (6); multiple sets of fixed baffles (701) are installed inside the tertiary air duct (7). The base (1) is provided with a booster structure, a conduction structure and a corner structure; The booster structure includes a first fixed block (9) and a second fixed block (12) disposed in the pulverized coal pipe (3); a first fan blade (901) is installed on the first fixed block (9); multiple sets of second fan blades (1201) are installed on the second fixed block (12); and the first fan blade (901) and the second fan blade (1201) are both inclined and in opposite directions. When the booster structure is activated, it can drive the first fixed block (9) and the second fixed block (12) to rotate, thereby driving the first fan blade (901) and the second fan blade (1201) to rotate in opposite directions, so as to mix the coal powder and accelerate the flow speed of the coal powder.

2. The pulverized coal combustion-assisted injection burner according to claim 1, characterized in that, The guiding structure includes multiple sets of sealing plates (19) disposed on the air intake pipe (5); the sealing plates (19) cooperate with each other; The booster structure is connected to the conduction structure and the rotation structure via an induction structure; the induction structure is used to sense the power of the booster structure. Furthermore, when the power of the booster structure increases or decreases, the rotation speed of the first fan blade (901) and the second fan blade (1201) will increase or decrease. The sensing structure can drive the conduction structure to move, thereby driving the sealing plate (19) to rotate, so as to increase or decrease the conduction area of ​​the air intake pipe (5); and drive the corner structure to move, so as to drive the rotating baffle (25) to rotate, thereby increasing or decreasing the tilt angle of the rotating baffle (25).

3. A pulverized coal combustion-assisted injection burner according to claim 2, characterized in that, The booster structure also includes a main shaft (8) rotatably mounted on the base (1), and the main shaft (8) is connected to the output end of the drive device; the main shaft (8) is connected to the first fixed block (9); a first bevel gear (801) is mounted on the main shaft (8); a rotating sleeve (11) is sleeved on the main shaft (8); the rotating sleeve (11) is connected to the second fixed block (12); a third bevel gear (1101) is mounted on the rotating sleeve (11); multiple sets of symmetrically arranged guide rods (22) are rotatably mounted on the base (1); a second bevel gear (10) is mounted on one end of the guide rod (22) and meshes with both the first bevel gear (801) and the third bevel gear (1101).

4. A pulverized coal combustion-assisted injection burner according to claim 3, characterized in that, The sensing structure includes a turntable (13) mounted on the guide rod (22); multiple centrifugal blocks (1301) are slidably fitted on the turntable (13); a telescopic column (1302) is installed on the centrifugal block (1301) at an incline; a movable sleeve (14) is sleeved on the guide rod (22); multiple telescopic sleeves (1401) are fixedly installed on the movable sleeve (14) and are slidably fitted with the telescopic column (1302); a connecting rod (15) is slidably fitted on the guide rod (22) and abuts against the movable sleeve (14); a spring (21) is sleeved on the guide rod (22); the two ends of the spring (21) abut against the connecting rod (15) and the guide rod (22) respectively.

5. A pulverized coal combustion-assisted injection burner according to claim 4, characterized in that, The sensing structure also includes multiple sets of first worm gears (17) and linkage shafts (23) rotatably mounted on the base (1); the first worm gears (17) are provided with spiral grooves (1701); the linkage shafts (23) are provided with inclined grooves (2301); the two ends of the connecting rod (15) are respectively equipped with a first sleeve (16) and a second sleeve (20); the first sleeve (16) is equipped with a first protruding post (1601) that slides into the spiral groove (1701); the second sleeve (20) is equipped with a second protruding post (2001) that slides into the inclined groove (2301).

6. A pulverized coal combustion-assisted injection burner according to claim 5, characterized in that, The guiding structure also includes a first worm gear (18) rotatably mounted on the intake pipe (5), and the first worm gear (18) meshes with the first worm (17); the first worm gear (18) has multiple sets of sliding grooves (1801); the sealing plate (19) is equipped with a protruding post (1901) that slides and engages with the sliding groove (1801).

7. A pulverized coal combustion-assisted injection burner according to claim 5, characterized in that, The rotating structure includes a second worm gear (24) rotatably mounted on the combustion chamber (2); the second worm gear (24) is connected to the linkage shaft (23) via a bevel gear set; a second worm wheel (26) meshing with the second worm gear (24) is rotatably mounted on the secondary air duct (6); a fifth bevel gear (2601) is installed inside the second worm wheel (26); a fourth bevel gear (2501) meshing with the fifth bevel gear (2601) is installed at one end of the rotating baffle (25).

8. A pulverized coal combustion-assisted injection burner according to claim 2, characterized in that, The primary air duct (4) is frustoconical in shape, and its diameter gradually decreases along the direction of coal powder flow. The inner sides of both the primary air duct (4) and the coal powder pipe (3) are coated with ceramic or basalt cast stone to reduce wear and tear.

9. A pulverized coal combustion-assisted injection burner according to claim 1, characterized in that, Both the first blade (901) and the second blade (1201) are asymmetrical blade structures.

10. A combustion-aiding process for a pulverized coal combustion-assisted injection burner as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Start the drive device, boost the structure to move, and accelerate the rate at which the coal powder in the coal powder pipeline (3) is injected into the combustion chamber (2) through the primary air pipe (4). The first fan blade (901) and the second fan blade (1201) rotate in opposite directions to shear the fluid, so that the gas and solid phases are uniform. Step 2: The sensing structure senses the operating power of the booster structure in real time and controls the operation of the conduction structure and the cornering structure. Step 3: The action of the guiding structure causes the sealing plate (19) to rotate, increasing or decreasing the guiding area of ​​the air inlet pipe (5), and controlling the amount of combustion-supporting gas injected upward from the secondary air pipe (6) and the tertiary air pipe (7); matching the amount of coal powder injected, and improving combustion efficiency; Step 4: The corner structure moves and rotates the baffle (25), increasing or decreasing the tilt angle, changing the swirling intensity, optimizing the mixing rate of pulverized coal, air and combustion-supporting gas, stabilizing the flame, and controlling the generation of pollutants.

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