Integrated pulverized coal burner

Abstract

The utility model discloses an integrated pulverized coal burner. A burner head comprises a cooling water jacket, a cooling water partition plate, a fuel gas nozzle, an ignition oxygen nozzle and a pulverized coal nozzle. The burner body comprises a cooling water outer pipe, a cooling water partition pipe, a cooling water inner pipe, a pulverized coal sleeve, an ignition oxygen sleeve, a fuel gas sleeve, an ignition gun mounting pipe and a flame detection pipe; a fuel gas channel is formed between the ignition gun mounting pipe and the fuel gas sleeve, an ignition oxygen channel is formed between the fuel gas sleeve and the ignition oxygen sleeve, a pulverized coal channel is formed between the ignition oxygen sleeve and the pulverized coal sleeve, and a process oxygen channel is formed between the pulverized coal sleeve and the cooling water inner pipe. A cooling water outlet cavity is formed between the cooling water outer pipe and the cooling water partition pipe, and a cooling water inlet cavity is formed between the cooling water inner pipe and the cooling water partition pipe. And the efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of coal chemical combustion equipment, specifically relating to an integrated pulverized coal burner. Background Technology

[0002] In the field of modern coal chemical industry, pulverized coal fluidized bed gasification has become one of the mainstream technologies for coal conversion and utilization due to its advantages such as high efficiency and cleanliness. In this process system, the burner, as a key piece of equipment, plays a decisive role in the efficiency, stability, and safety of the production process through its performance and structural design.

[0003] Traditional pulverized coal burners have significant design and application flaws. They typically separate flame detection, start-up burners, and process burners, resulting in extremely complex and cumbersome production and installation processes. Each individual component requires separate installation and precise calibration, which not only consumes substantial human and material resources but also significantly prolongs the installation cycle and increases costs. Furthermore, the need for multiple positioning and calibrations during component installation makes them highly susceptible to installation errors, leading to equipment malfunctions and severely impacting production. In addition, the multiple independent components occupy a large amount of space, placing excessive demands on the layout and planning of the production site and limiting the effective utilization of production space.

[0004] From a maintenance perspective, the presence of multiple independent burners results in high maintenance costs. When equipment requires maintenance, each burner with a different function must be inspected and repaired separately, undoubtedly lengthening the overall maintenance time, leading to prolonged production downtime and indirect economic losses. Furthermore, due to the differences in the structure and operating principles of different burners, maintenance personnel need to possess multiple professional skills, significantly increasing labor costs. Moreover, replacing parts involves multiple different models of burner components, increasing the difficulty of parts procurement and inventory management, and consequently raising replacement costs. More importantly, the traditional separate burner design does not seamlessly integrate with the complex process packages of pulverized coal fluidized bed combustion, resulting in low coordination efficiency between process packages and failing to fully leverage the overall process advantages.

[0005] In conclusion, in order to solve the many problems existing in the production, installation and actual operation of traditional pulverized coal burners, and to meet the urgent needs of industrial production for efficient, environmentally friendly and safe combustion equipment, it is imperative to develop a new type of burner that can overcome the drawbacks of traditional burners. Summary of the Invention

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a pulverized coal burner that is reasonably designed, space-saving, cost-effective, and integrates flame detection, ignition gun, start-up fuel gas, start-up oxygen, process pulverized coal, and process oxygen into one unit.

[0007] The technical solution adopted to solve the above-mentioned technical problems is: an integrated pulverized coal burner, including a burner head and a burner body. The burner body comprises: an ignition gun installed at the left end of an ignition gun mounting tube, the ignition gun being limited by an ignition gun limiting head; a flame detector tube installed at the center of the ignition gun mounting tube; a third flange installed at the end of the flame detector tube; a fourth flange installed at the end of the ignition gun mounting tube; the third flange and the fourth flange being connected; a flame detector interface connected to the flame detector tube via the third flange; an ignition gun interface connected to the ignition gun mounting tube via the third flange and the fourth flange; a high-temperature resistant wire, one end of which is introduced into the ignition gun mounting tube through the ignition gun interface and connected to the ignition gun, and the other end connected to the ignition wiring plug; and, sequentially, fuel gas sleeves, ignition oxygen sleeves, pulverized coal sleeves, cooling water inner pipes, and cooling... A fuel gas passage is formed between the cooling water outer pipe, the ignition gun mounting pipe, and the fuel gas sleeve. The fuel gas passage is connected to the fuel gas inlet pipe. An ignition oxygen passage is formed between the fuel gas sleeve and the ignition oxygen sleeve. The ignition oxygen passage is connected to the ignition oxygen inlet pipe. A pulverized coal passage is formed between the ignition oxygen sleeve and the pulverized coal sleeve. The pulverized coal passage is connected to the pulverized coal inlet pipe. A process oxygen passage is formed between the pulverized coal sleeve and the cooling water inner pipe. The process oxygen passage is connected to the process oxygen inlet pipe. A cooling water baffle is installed between the cooling water inner pipe and the cooling water outer pipe. A cooling water outlet cavity is formed between the cooling water outer pipe and the cooling water baffle. A cooling water inlet cavity is formed between the cooling water inner pipe and the cooling water baffle. The cooling water inlet cavity is connected to the cooling water inlet pipe. The cooling water outlet cavity is connected to the cooling water outlet pipe.

[0008] The burner head comprises: a fuel gas nozzle at the ignition end of the fuel gas bushing; an ignition oxygen nozzle at the ignition end of the ignition oxygen bushing; the ignition oxygen nozzle and the fuel gas nozzle are connected to form a jacket; oxygen nozzles are machined on the ignition oxygen nozzle; a pulverized coal nozzle at the ignition end of the pulverized coal bushing; and cooling water jackets at the ignition ends of the inner and outer cooling water pipes; a cooling water baffle is installed inside the cooling water jacket; and the cooling water baffle is connected to the ignition end of the cooling water baffle pipe.

[0009] The present invention features a mounting flange at the back-fire end of the cooling water outer pipe. A fourth connecting pipe is located at the end of the mounting flange, communicating with the cooling water cavity. A cooling water inlet pipe and a cooling water outlet pipe are symmetrically arranged on the fourth connecting pipe. The fourth connecting pipe is connected to a third connecting pipe, which in turn is connected to the process oxygen channel. A process oxygen inlet pipe is located on the third connecting pipe, and its end is connected to a first flange. The first flange is fitted onto the back-fire end of the pulverized coal pipe and communicates with the pulverized coal channel. A second flange is located at the end of the first flange, and a second connecting pipe is located at the end of the second flange. The front end of the second connecting pipe is connected to the ignition point. The oxygen jacket forms a pulverized coal channel. A pulverized coal inlet pipe is installed on the second connecting pipe, which is connected to the pulverized coal channel. A sixth flange is installed at the end of the second connecting pipe. The rear end of the second connecting pipe, the sixth flange, and the fuel gas jacket form an ignition oxygen channel. An ignition oxygen inlet pipe is installed on the second connecting pipe, which is connected to the ignition oxygen channel. A fifth flange is installed at the end of the sixth flange. The end of the fifth flange is connected to the fourth flange through the first connecting pipe. A fuel gas channel is formed between the fifth flange, the ignition gun installation pipe, the fuel gas pipe, the first connecting pipe, and the fourth flange. A fuel gas inlet pipe is installed on the fifth flange and is connected to the fuel gas channel.

[0010] The present invention has a communicating vessel between the burner head and the burner body.

[0011] The communicating vessel of this utility model is as follows: a mounting hole is machined in the middle of the communicating vessel body, and the inside of the mounting hole is connected to the outer wall of the ignition oxygen sleeve through a positioning block. The communicating vessel body is radially machined from the inside to the outside with process oxygen communicating holes, cooling water inlet communicating holes, and cooling water outlet communicating holes. There are 4 groups of process oxygen communicating holes evenly distributed within a 360° phase, and the center line of each group of process oxygen communicating holes is a 1 / 4 arc. There are several groups of cooling water inlet communicating holes and cooling water outlet communicating holes evenly distributed within a 360° phase, and each group of cooling water inlet communicating holes or cooling water outlet communicating holes is a circular through hole with its center line parallel to the center line of the communicating vessel body.

[0012] In this invention, 2 to 6 sets of oxygen cyclones are evenly distributed within a 360° phase near the ignition end in the process oxygen channel. The oxygen cyclones are finned structures evenly distributed along the circumference, with a fin thickness of 2 to 5 mm and a number of 4 to 40 fins. Each fin has an angle of 10 to 40° with the axial direction. A pulverized coal cyclone is also provided in the pulverized coal channel, and the pulverized coal cyclone is a spiral strip arranged circumferentially along the outer wall of the ignition oxygen sleeve.

[0013] The inner surface of the cooling water jacket of this invention is formed by a cylindrical surface and an inwardly converging conical surface. The inner surface of the pulverized coal nozzle is cylindrical, and the middle part of the outer surface of the pulverized coal nozzle is cylindrical, while both ends are inwardly converging conical surfaces. The conical surface of the pulverized coal nozzle at the ignition end is parallel to the conical surface of the cooling water jacket 3, forming a process oxygen channel. The outer surface of the ignition oxygen nozzle is cylindrical, the end at the ignition end is vertical, and the inner surface is an outwardly diffusing conical surface. Two concentric rings of oxygen are machined on the conical surface. The centerline of the oxygen nozzle is perpendicular to the conical surface of the ignition oxygen nozzle. The fuel gas nozzle has a cylindrical structure at the fire-facing end, an outwardly diffusing conical structure in the middle, and a cylindrical structure at the back-fire end. The outer side of the ignition gun limiting head is formed by a cylindrical surface and an outwardly diffusing conical surface. The cylindrical surface of the fuel gas nozzle at the fire-facing end has the same length as the cylindrical surface of the outer side of the ignition gun limiting head, and the conical surface of the fuel gas nozzle is parallel to the conical surface of the ignition gun limiting head, forming a fuel gas channel.

[0014] In this invention, the angle α between the conical surface of the ignition oxygen nozzle and the center line of the burner body is 30° to 60°, the angle γ between the conical surface of the cooling water jacket and the center line of the burner body is 20° to 40°, and the angle β between the conical surface of the fuel gas nozzle and the center line of the burner body is 10° to 30°.

[0015] The distance L1 between the end of the ignition gun limiting head and the end face of the ignition oxygen nozzle is 10-20mm, the distance L2 between the end of the ignition oxygen nozzle and the end of the pulverized coal nozzle is 1-5mm, and the distance L3 between the end of the pulverized coal nozzle and the end of the cooling water jacket is 1-6mm.

[0016] The cooling water inner pipe of this invention is provided with a first corrugated pipe at the backfire end, and the ignition oxygen bushing is provided with a second corrugated pipe at the backfire end.

[0017] This utility model integrates multiple key functions, including flame detection, ignition gun, start-up fuel gas, start-up oxygen, process pulverized coal, and process oxygen, into a single device. Through integrated design, the installation process is greatly simplified, requiring only a single installation operation to complete the installation tasks that would otherwise require multiple components. This significantly shortens installation time, reduces installation difficulty, and greatly reduces the possibility of installation errors and malfunctions. Furthermore, the compact layout of the equipment effectively reduces the floor space required, optimizing the use of production space and making the production layout more rational and efficient. In actual production operation, the integrated pulverized coal burner can precisely control the supply and mixing ratio of each medium through process adjustments. During the ignition stage, the ignition gun, start-up fuel gas, and start-up oxygen work together to achieve rapid and stable ignition startup. Simultaneously, the flame detection device monitors the flame status in real time and accurately, providing immediate feedback in case of any abnormalities, providing reliable safety assurance for the ignition process. In the normal production stage, process pulverized coal and process oxygen are precisely mixed according to a preset ratio for complete combustion, significantly improving combustion efficiency, reducing energy consumption, reducing pollutant emissions, and comprehensively enhancing the economic and environmental benefits of the production process. Meanwhile, the integrated design greatly simplifies maintenance work, requiring only a single piece of equipment for overall inspection and maintenance, effectively controlling maintenance time, manpower input, and parts replacement costs. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of one embodiment of the present invention.

[0019] Figure 2 yes Figure 1 Another way to connect the nozzle head.

[0020] Figure 3 yes Figure 1 A schematic diagram of the structure of the middle communicating vessel 2.

[0021] Figure 4 yes Figure 3 The left view.

[0022] In the diagram: 1. High-temperature resistant wire; 2. Communicating vessel; 3. Cooling water jacket; 4. Cooling water baffle; 5. Fuel gas nozzle; 6. Ignition gun; 7. Ignition gun limiting head; 8. Ignition oxygen nozzle; 9. Pulverized coal nozzle; 10. Positioning block; 11. Cooling water outer pipe; 12. Cooling water baffle; 13. Cooling water inner pipe; 14. Pulverized coal sleeve; 15. Ignition oxygen sleeve; 16. Fuel gas sleeve; 17. Ignition gun mounting pipe; 18. Flame detector pipe; 19. Mounting flange; 20. Cooling water inlet pipe; 21. First corrugated pipe; 22. Process oxygen inlet pipe; 23. First flange; 24. Second flange; 25. Coal... 26. Pulverized coal inlet pipe; 27. Second corrugated pipe; 28. Fuel gas inlet pipe; 29. ​​Flame detector interface; 30. Ignition gun interface; 31. Third flange; 32. Fourth flange; 33. First connecting pipe; 34. Fifth flange; 35. Sixth flange; 36. Ignition oxygen inlet pipe; 37. Second connecting pipe; 38. Third connecting pipe; 39. Cooling water outlet pipe; 40. Fourth connecting pipe; 41. Oxygen cyclone; 2-1. Pulverized coal cyclone; 2-2. Communicator body; 2-3. Process oxygen communication hole; 2-4. Cooling water inlet communication hole; 2-6. Cooling water outlet communication hole. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but the present invention is not limited to these embodiments. Example 1

[0024] exist Figures 1-4The present invention relates to an integrated pulverized coal burner, comprising a burner head and a burner body. The burner body comprises an outer cooling water pipe 11, a cooling water baffle 12, an inner cooling water pipe 13, a pulverized coal sleeve 14, an ignition oxygen sleeve 15, a fuel gas sleeve 16, an ignition gun mounting pipe 17, a flame detector pipe 18, a mounting flange 19, a cooling water inlet pipe 20, a first corrugated pipe 21, a process oxygen inlet pipe 22, a first flange 23, a second flange 24, a pulverized coal inlet pipe 25, a second corrugated pipe 26, a fuel gas inlet pipe 27, a flame detector interface 28, an ignition gun interface 29, a third flange 30, and a fourth flange. 31. The first connecting pipe, 32. the fifth flange, 33. the sixth flange, 34. the ignition oxygen inlet pipe, 35. the second connecting pipe, 36. the third connecting pipe, 37. the cooling water outlet pipe, 38. and the fourth connecting pipe are connected to form a structure. An ignition gun 6 is installed at the left end of the ignition gun mounting pipe 17. The ignition gun 6 is limited by the ignition gun limiting head 7. A flame detector pipe 18 is installed at the center of the ignition gun mounting pipe 17. A third flange 30 is installed at the end of the flame detector pipe 18. A fourth flange 31 is installed at the end of the ignition gun mounting pipe 17. The third flange 30 and the fourth flange 31 are connected. The flame detection interface 28 is connected to the flame detector pipe 18 through the third flange 30. The ignition gun interface 29 is connected to the ignition gun mounting tube 17 via the third flange 30 and the fourth flange 31. One end of the high-temperature resistant wire 1 is introduced into the ignition gun mounting tube 17 through the ignition gun interface 29 and connected to the ignition gun 6; the other end is connected to the ignition wiring plug. A fuel gas sleeve 16, an ignition oxygen sleeve 15, a pulverized coal sleeve 14, an inner cooling water pipe 13, and an outer cooling water pipe 11 are sequentially arranged outside the ignition gun mounting tube 17. A fuel gas passage is formed between the ignition gun mounting tube 17 and the fuel gas sleeve 16, and an ignition oxygen passage is formed between the fuel gas sleeve 16 and the ignition oxygen sleeve 15. The ignition oxygen sleeve 15 and... A pulverized coal channel is formed between the pulverized coal sleeves 14, and a process oxygen channel is formed between the pulverized coal sleeves 14 and the cooling water inner pipe 13. A first corrugated pipe 21 is provided at the back-fire end of the cooling water inner pipe 13. The first corrugated pipe 21 is used to release the thermal stress of the pipeline caused by temperature changes. A cooling water baffle 12 is provided between the cooling water inner pipe 13 and the cooling water outer pipe 11. A cooling water outlet cavity is formed between the cooling water outer pipe 11 and the cooling water baffle 12. A cooling water inlet cavity is formed between the cooling water inner pipe 13 and the cooling water baffle 12. The cooling water inlet cavity is connected to the cooling water inlet pipe 20, and the cooling water outlet cavity is connected to the cooling water outlet pipe 38.

[0025] Specifically, the cooling water outer pipe 11 is provided with a mounting flange 19 at the unfired end. The end of the mounting flange 19 is provided with a fourth connecting pipe 39, which is connected to the cooling water cavity. A cooling water inlet pipe 20 and a cooling water outlet pipe 38 are symmetrically arranged on the fourth connecting pipe 39. The fourth connecting pipe 39 is connected to a third connecting pipe 37, which is connected to the process oxygen channel. A process oxygen inlet pipe 22 is provided on the third connecting pipe 37. The end of the third connecting pipe 37 is connected to a first flange 23. The first flange 23 is fitted onto the unfired end of the pulverized coal pipe 14 and is connected to the pulverized coal channel 14. A second flange 24 is provided at the end of the first flange 23. A second connecting pipe 36 is provided at the end of the second flange 24. The front end of the second connecting pipe 36 forms a pulverized coal channel with the ignition oxygen sleeve 15. A second corrugated pipe 26 is provided at the unfired end of the ignition oxygen sleeve 15. The second corrugated pipe 26 is used to release the thermal stress of the pipe caused by temperature changes. A pulverized coal inlet pipe 25 is provided on the second connecting pipe 36, which is connected to the pulverized coal channel. A sixth flange 34 is provided at the end of the second connecting pipe 36. The rear end of the second connecting pipe 36, the sixth flange 34 and the fuel gas sleeve 16 form an ignition oxygen channel. An ignition oxygen inlet pipe 35 is provided on the second connecting pipe 36, which is connected to the ignition oxygen channel. A fifth flange 33 is provided at the end of the sixth flange 34. The end of the fifth flange 33 is connected to the fourth flange 31 through the first connecting pipe 32. A fuel gas channel is formed between the fifth flange 33, the ignition gun installation pipe 17, the fuel gas pipe 16, the first connecting pipe 32 and the fourth flange 31. A fuel gas inlet pipe 27 is provided on the fifth flange 33 and is connected to the fuel gas channel.

[0026] In this embodiment, the burner head is composed of a cooling water jacket 3, a cooling water baffle 4, a fuel gas nozzle 5, an ignition oxygen nozzle 8, and a pulverized coal nozzle 9. The fuel gas nozzle 5 is provided at the ignition end of the fuel gas sleeve 16, and the ignition oxygen nozzle 8 is provided at the ignition end of the ignition oxygen sleeve 15. The ends of the ignition oxygen nozzle 8 and the fuel gas nozzle 5 are connected to form a jacket. The ignition oxygen nozzle 8 is machined with oxygen nozzle holes. The pulverized coal nozzle 9 is provided at the ignition end of the pulverized coal sleeve 14. The cooling water jacket 3 is provided at the ignition end of the inner cooling water pipe 13 and the outer cooling water pipe 11. The cooling water baffle 4 is provided inside the cooling water jacket 3. The cooling water baffle 4 is connected to the ignition end of the cooling water baffle 12. There is a certain distance between the end of the cooling water baffle 4 and the bottom of the cooling water jacket 3 for water to flow through.

[0027] Specifically, in this embodiment, the inner surface of the cooling water jacket 3 is formed by a cylindrical surface and an inwardly converging conical surface. The inner surface of the pulverized coal nozzle 9 is a cylindrical surface, and the middle part of the outer surface of the pulverized coal nozzle 9 is a cylindrical surface, with the two ends being inwardly converging conical surfaces. The conical surface of the pulverized coal nozzle 9 at the fire end is parallel to the conical surface of the cooling water jacket 3 to form a process oxygen channel. Since the process oxygen enters the burner head axially and then sprays out at an inward angle, the pulverized coal channel formed by the ignition oxygen nozzle 8 and the pulverized coal nozzle 9 causes the pulverized coal to be sprayed out axially. This structure allows the high-speed flowing oxygen to shear the axially flowing pulverized coal, so that the process oxygen and pulverized coal are fully mixed. The angle γ between the conical surface of the cooling water jacket 3 and the center line of the burner body is 30°. This angle allows the process oxygen to better shear the pulverized coal and fully mix it without scouring the gasifier wall. The distance L3 between the end of the pulverized coal nozzle 9 and the end of the cooling water jacket 3 is 4mm. This distance allows the pulverized coal to mix with the process oxygen before it is sprayed out of the burner end. The outer surface of the ignition oxygen nozzle 8 is cylindrical, the end facing the flame is vertical, and the inner surface is a conical surface that diffuses outward. Two concentric rings of oxygen nozzles are machined on the conical surface, with the center line of the oxygen nozzle perpendicular to the conical surface. The angle α between the conical surface of the ignition oxygen nozzle 8 and the center line of the burner body is 45°, which allows the ignition oxygen to mix with the fuel gas in a shorter distance, improving the ignition success rate while preventing the burner head from burning out. The distance L2 between the end of the ignition oxygen nozzle 8 and the end of the pulverized coal nozzle 9 is 3mm. This distance can effectively prevent the ignition oxygen nozzle from burning out when the process oxygen and pulverized coal are mixed and burned. The fuel gas nozzle 5 has a cylindrical structure at the fire-facing end, a conical structure in the middle that diffuses outwards, and a cylindrical structure at the back-fire end. The angle β between the conical surface of the fuel gas nozzle 5 and the centerline of the burner body is 18°. The outer side of the ignition gun limiting head 7 is formed by a cylindrical surface and an outwardly diffused conical surface. The cylindrical surface of the fuel gas nozzle 5 at the fire-facing end has the same length as the outer cylindrical surface of the ignition gun limiting head 7, and the conical surface of the fuel gas nozzle 5 and the conical surface of the ignition gun limiting head 7 are parallel, forming a fuel gas channel. The fuel gas enters the burner head axially and then passes through... After being accelerated by the conical surface, the fuel gas is ejected axially. By reducing the fuel gas outlet area, the flow velocity of the fuel gas after ejection is increased. After entering the burner head axially, the oxygen is ejected inward at an angle. The direction of oxygen ejection forms an acute angle with the direction of fuel gas ejection, which can fully mix the fuel gas and oxygen, improve the ignition success rate, and prevent flameout under high load. The distance L1 between the end of the ignition gun limiting head 7 and the end face of the ignition oxygen nozzle 8 is 15mm. A premixing zone of ignition oxygen and fuel gas is formed within this distance between the ignition oxygen nozzle 8 and the ignition gun limiting head 7. Example 2

[0028] In the above embodiment 1, a communicating vessel 2 is provided between the burner head and the burner body. The communicating vessel 2 includes a communicating vessel body 2-2. A mounting hole 2-1 is machined in the middle of the communicating vessel body 2-2. The interior of the mounting hole 2-1 is connected to the outer wall of the ignition oxygen sleeve 15 through a positioning block 10. The positioning block 10 is used to adjust the uniformity of the annular gap of the pulverized coal channel. The communicating vessel body 2-2 is radially machined from the inside to the outside with process oxygen communicating holes 2-3, cooling water inlet communicating holes 2-4, and cooling water outlet communicating holes 2-5. There are 4 sets of process oxygen communicating holes 2-3 evenly distributed within a 360° phase. The center line of each set of process oxygen communicating holes 2-5 is a 1 / 4 arc. There are several sets of cooling water inlet communicating holes 2-4 and cooling water outlet communicating holes 2-5 evenly distributed within a 360° phase. Each set of cooling water inlet communicating holes 2-4 or cooling water outlet communicating holes 2-5 is a circular through hole with its center line parallel to the center line of the communicating vessel body 2-2, ensuring that each channel is uniform. The remaining components and their connection relationships are the same as in Example 1. Example 3

[0029] In the above embodiment 1, 2 to 6 sets of oxygen cyclones 40 are evenly distributed within a 360° phase near the ignition end in the process oxygen channel of this embodiment. The oxygen cyclones 40 are finned structures evenly distributed along the circumference, with a fin thickness of 2 to 5 mm and a number of 4 to 40 fins. Each fin has an angle of 10 to 40° with the axial direction, which allows the oxygen to swirl fully in the channel before being ejected from the burner. A pulverized coal cyclone 41 is provided in the pulverized coal channel. The pulverized coal cyclone 41 is a spiral strip arranged circumferentially along the outer wall of the ignition oxygen sleeve 15. The purpose of the spiral strip is to make the pulverized coal swirl before being ejected, so as to fully mix with the oxygen for combustion. The remaining components and their connection relationships are the same as in embodiment 1. Example 4

[0030] In the above embodiments 1 to 3, the angle α between the conical surface of the ignition oxygen nozzle 8 and the center line of the burner body is 30°, the angle γ between the conical surface of the cooling water jacket 3 and the center line of the burner body is 20°, the angle β between the conical surface of the fuel gas nozzle 5 and the center line of the burner body is 10°, the distance L1 between the end of the ignition gun limiting head 7 and the end face of the ignition oxygen nozzle 8 is 10mm, the distance L2 between the end of the ignition oxygen nozzle 8 and the end of the pulverized coal nozzle 9 is 1mm, the distance L3 between the end of the pulverized coal nozzle 9 and the end of the cooling water jacket 3 is 1mm, and the remaining components and their connection relationships are the same as in embodiment 1. Example 5

[0031] In the above embodiments 1 to 3, the angle α between the conical surface of the ignition oxygen nozzle 8 and the center line of the burner body is 60°, the angle γ between the conical surface of the cooling water jacket 3 and the center line of the burner body is 40°, the angle β between the conical surface of the fuel gas nozzle 5 and the center line of the burner body is 30°, the distance L1 between the end of the ignition gun limiting head 7 and the end face of the ignition oxygen nozzle 8 is 20mm, the distance L2 between the end of the ignition oxygen nozzle 8 and the end of the pulverized coal nozzle 9 is 5mm, the distance L3 between the end of the pulverized coal nozzle 9 and the end of the cooling water jacket 3 is 6mm, and the remaining components and their connection relationships are the same as in embodiment 1.

Claims

1. An integrated pulverized coal burner, comprising a burner head and a burner body, characterized in that... The burner body is as follows: an ignition gun (6) is provided at the left end of the ignition gun mounting tube (17), the ignition gun (6) is limited by the ignition gun limiting head (7), a flame detector tube (18) is provided at the center of the ignition gun mounting tube (17), a third flange (30) is provided at the end of the flame detector tube (18), a fourth flange (31) is provided at the end of the ignition gun mounting tube (17), the third flange (30) and the fourth flange (31) are connected, and the flame detection interface (28) is connected to the flame detector tube (18) through the third flange (30). The ignition gun interface (29) is connected to the ignition gun mounting pipe (17) via the third flange (30) and the fourth flange (31). One end of the high-temperature resistant wire (1) is introduced into the ignition gun mounting pipe (17) through the ignition gun interface (29) and connected to the ignition gun (6). The other end is connected to the ignition wiring plug. The ignition gun mounting pipe (17) is provided with fuel gas sleeve (16), ignition oxygen sleeve (15), pulverized coal sleeve (14), cooling water inner pipe (13), and cooling water outer pipe (11) in sequence. A fuel gas passage is formed between the flare gun mounting pipe (17) and the fuel gas sleeve (16), and the fuel gas passage is connected to the fuel gas inlet pipe (27). An ignition oxygen passage is formed between the fuel gas sleeve (16) and the ignition oxygen sleeve (15), and the ignition oxygen passage is connected to the ignition oxygen inlet pipe (35). A pulverized coal passage is formed between the ignition oxygen sleeve (15) and the pulverized coal sleeve (14), and the pulverized coal passage is connected to the pulverized coal inlet pipe (25). The pulverized coal sleeve (14) and the cooling water inner pipe (13) are connected to each other. A process oxygen channel is formed between them, and the process oxygen channel is connected to the process oxygen inlet pipe (22). A cooling water baffle (12) is provided between the inner cooling water pipe (13) and the outer cooling water pipe (11). A cooling water outlet cavity is formed between the outer cooling water pipe (11) and the cooling water baffle (12). A cooling water inlet cavity is formed between the inner cooling water pipe (13) and the cooling water baffle (12). The cooling water inlet cavity is connected to the cooling water inlet pipe (20). The cooling water outlet cavity is connected to the cooling water outlet pipe (38). The burner head is as follows: a fuel gas nozzle (5) is provided on the fire-facing end of the fuel gas sleeve (16), an ignition oxygen nozzle (8) is provided on the fire-facing end of the ignition oxygen sleeve (15), the ends of the ignition oxygen nozzle (8) and the fuel gas nozzle (5) are connected to form a jacket, an oxygen nozzle hole is machined on the ignition oxygen nozzle (8), a pulverized coal nozzle (9) is provided on the fire-facing end of the pulverized coal sleeve (14), a cooling water jacket (3) is provided on the fire-facing ends of the inner cooling water pipe (13) and the outer cooling water pipe (11), a cooling water baffle (4) is provided inside the cooling water jacket (3), and the cooling water baffle (4) is connected to the fire-facing end of the cooling water baffle pipe (12).

2. The integrated pulverized coal burner according to claim 1, characterized in that: The cooling water outer pipe (11) is provided with a mounting flange (19) at the back-fire end. A fourth connecting pipe (39) is provided at the end of the mounting flange (19). The fourth connecting pipe (39) is connected to the cooling water cavity. A cooling water inlet pipe (20) and a cooling water outlet pipe (38) are symmetrically arranged on the fourth connecting pipe (39). The fourth connecting pipe (39) is connected to the third connecting pipe (37). The third connecting pipe (37) is connected to the process oxygen channel. A process oxygen inlet pipe (22) is provided on the third connecting pipe (37). The end of the third connecting pipe (37) is connected to the first flange (23). The first flange (23) is fitted onto the back-fire end of the pulverized coal sleeve (14) and is connected to the pulverized coal sleeve (14). A second flange (24) is provided at the end of the first flange (23). A second connecting pipe (36) is provided at the end of the second flange (24). The front end of the second connecting pipe (36) is connected to the point The ignition oxygen bushing (15) forms a pulverized coal channel. A pulverized coal inlet pipe (25) is provided on the second connecting pipe (36) in connection with the pulverized coal channel. A sixth flange (34) is provided at the end of the second connecting pipe (36). The rear end of the second connecting pipe (36), the sixth flange (34) and the fuel gas bushing (16) form an ignition oxygen channel. An ignition oxygen inlet pipe (35) is provided on the second connecting pipe (36) in connection with the ignition oxygen channel. A fifth flange (33) is provided at the end of the sixth flange (34). The end of the fifth flange (33) is connected to the fourth flange (31) through the first connecting pipe (32). A fuel gas channel is formed between the fifth flange (33) and the ignition gun mounting pipe (17), the fuel gas bushing (16), the first connecting pipe (32) and the fourth flange (31). A fuel gas inlet pipe (27) is provided on the fifth flange (33) and is connected to the fuel gas channel.

3. The integrated pulverized coal burner according to claim 1, characterized in that: A communicating vessel (2) is provided between the burner head and the burner body.

4. The integrated pulverized coal burner according to claim 3, characterized in that... The communicating vessel (2) is as follows: the communicating vessel body (2-2) has a mounting hole (2-1) in the middle. The mounting hole (2-1) is connected to the outer wall of the ignition oxygen sleeve (15) through the positioning block (10). The communicating vessel body (2-2) is radially processed from the inside to the outside with process oxygen communicating hole (2-3), cooling water inlet communicating hole (2-4), and cooling water outlet communicating hole (2-5). There are 4 groups of process oxygen communicating holes (2-3) evenly distributed in the 360° phase. The center line of each group of process oxygen communicating holes (2-3) is a 1 / 4 arc. There are several groups of cooling water inlet communicating holes (2-4) and cooling water outlet communicating holes (2-5) evenly distributed in the 360° phase. Each group of cooling water inlet communicating holes (2-4) or cooling water outlet communicating holes (2-5) is a circular through hole with its center line parallel to the center line of the communicating vessel body (2-2).

5. The integrated pulverized coal burner according to claim 1, characterized in that: The process oxygen channel is provided with 2 to 6 sets of oxygen cyclones (40) evenly distributed in a 360° phase near the ignition end. The oxygen cyclones (40) are fin structures evenly distributed along the circumference, with a fin thickness of 2 to 5 mm. The number of fins is 4 to 40, and each fin has an angle of 10 to 40° with the axial direction. The pulverized coal channel is provided with pulverized coal cyclones (41), which are spiral strips arranged circumferentially along the outer wall of the ignition oxygen sleeve (15).

6. The integrated pulverized coal burner according to claim 1, characterized in that: The inner surface of the cooling water jacket (3) is formed by a cylindrical surface and an inwardly converging conical surface. The inner surface of the pulverized coal nozzle (9) is a cylindrical surface. The middle part of the outer surface of the pulverized coal nozzle (9) is a cylindrical surface, and the two ends are inwardly converging conical surfaces. The conical surface of the pulverized coal nozzle (9) at the fire end is parallel to the conical surface of the cooling water jacket (3) to form a process oxygen channel. The outer surface of the ignition oxygen nozzle (8) is a cylindrical surface, the fire end is a vertical surface, and the inner surface is an outwardly diffusing conical surface. Two concentric rings of oxygen nozzle holes are machined on the conical surface. The centerline of the oxygen nozzle is perpendicular to the conical surface of the ignition oxygen nozzle (8). The fuel gas nozzle (5) has a cylindrical structure at the fire-facing end, an outwardly diffusing conical structure in the middle, and a cylindrical structure at the back-fire end. The outer side of the ignition gun limiting head (7) is formed by a cylindrical surface and an outwardly diffusing conical surface. The cylindrical surface of the fuel gas nozzle (5) at the fire-facing end has the same length as the cylindrical surface of the outer side of the ignition gun limiting head (7). The conical surface of the fuel gas nozzle (5) is parallel to the conical surface of the ignition gun limiting head (7) to form a fuel gas channel.

7. The integrated pulverized coal burner according to claim 6, characterized in that: The angle α between the conical surface of the ignition oxygen nozzle (8) and the center line of the burner body is 30° to 60°, the angle γ between the conical surface of the cooling water jacket (3) and the center line of the burner body is 20° to 40°, and the angle β between the conical surface of the fuel gas nozzle (5) and the center line of the burner body is 10° to 30°.

8. The integrated pulverized coal burner according to claim 1, characterized in that: The distance L1 between the end of the ignition gun limiting head 7 and the end face of the ignition oxygen nozzle (8) is 10-20mm, the distance L2 between the end of the ignition oxygen nozzle (8) and the end of the pulverized coal nozzle (9) is 1-5mm, and the distance L3 between the end of the pulverized coal nozzle (9) and the end of the cooling water jacket (3) is 1-6mm.

9. The integrated pulverized coal burner according to claim 1, characterized in that: The cooling water inner pipe (13) is provided with a first corrugated pipe (21) at the off-fire end, and the ignition oxygen sleeve (15) is provided with a second corrugated pipe (26) at the off-fire end.

Images