Integrated pulverized coal burner and ignition method thereof

Abstract

The invention 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. Various key functions such as flame detection, an ignition gun, start-up fuel gas, start-up oxygen, process pulverized coal and process oxygen are integrated into single equipment, and the device has the advantages that the cost is saved, and the efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal chemical combustion equipment, and specifically relates to an integrated pulverized coal burner and an ignition method thereof. Background Art

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

[0003] Traditional pulverized coal burners have significant defects in design and application. Flame detection, start-up burners, and process burners are generally set up independently of each other. This separate design makes the production and installation process extremely complicated and cumbersome. Each independent component needs to be installed and fine-tuned separately, which not only consumes a lot of manpower and material resources, but also greatly prolongs the installation cycle and increases the installation cost. Moreover, since each component needs to be positioned and calibrated multiple times during installation, installation errors are very likely to occur, which in turn causes equipment failures and seriously affects the smooth progress of production. In addition, multiple independent components occupy a large amount of space, which places excessive demands on the layout planning of the production site and limits the effective use of production space.

[0004] From the maintenance perspective, multiple independent burners bring high maintenance costs. When the equipment needs maintenance and repair, the burners with different functions must be inspected and repaired separately, which undoubtedly prolongs the overall maintenance time, resulting in an extension of the production stagnation period and indirect economic losses. At the same time, due to the differences in the structures and principles of different burners, maintenance personnel need to have a variety of professional skills, and the manpower input cost increases significantly. In addition, when replacing parts, because many different types of burner components are involved, the difficulty of parts procurement and inventory management increases, and the cost of parts replacement also rises accordingly. More importantly, the separate design of the traditional burner is not smoothly connected with the complex process package of the pulverized coal fluidized bed, and the coordination efficiency between the process packages is low, which cannot give full play to the overall process advantages.

[0005] In summary, in order to solve the many problems existing in the production, installation and actual operation of traditional pulverized coal burners and meet the urgent needs of industrial production for efficient, environmentally friendly and safe combustion equipment, it is urgent 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 the present invention is to overcome the deficiencies of the above-mentioned prior art, provide a pulverized coal burner with reasonable design, space saving and cost saving, which integrates flame detection, ignition gun, start-up fuel gas, start-up oxygen, process pulverized coal and process oxygen, and provides its ignition method.

[0007] The technical solution adopted to solve the above technical problems is: an integrated pulverized coal burner, including a burner head and a burner body, the burner body is: an ignition gun is arranged at the left end of the ignition gun mounting tube, the ignition gun is limited by the ignition gun limit head, a fire detection tube is arranged in the center of the ignition gun mounting tube, a third flange is arranged at the end of the fire detection tube, a fourth flange is arranged at the end of the ignition gun mounting tube, the third flange and the fourth flange are connected, the fire detection interface is connected to the fire detection tube through the third flange, the ignition gun interface is connected to the ignition gun mounting tube through the third flange and the fourth flange, one end of the high temperature resistant wire is introduced into the ignition gun mounting tube through the ignition gun interface to connect with the ignition gun, and the other end is connected to the ignition wiring plug, and the outside of the ignition gun mounting tube is sequentially provided with a fuel gas sleeve, an ignition oxygen sleeve, a coal powder sleeve, a cooling water inner tube, a cooling water inner tube, and a cooling water inner tube. a cooling water outer tube, a fuel gas channel is formed between the ignition gun mounting tube and the fuel gas sleeve, the fuel gas channel is connected to the fuel gas inlet pipeline, an ignition oxygen channel is formed between the fuel gas sleeve and the ignition oxygen sleeve, the ignition oxygen channel is connected to the ignition oxygen inlet pipeline, a pulverized coal channel is formed between the ignition oxygen sleeve and the pulverized coal sleeve, the pulverized coal channel is connected to the pulverized coal inlet pipeline, a process oxygen channel is formed between the pulverized coal sleeve and the cooling water inner tube, the process oxygen channel is connected to the process oxygen inlet pipeline, a cooling water spacer is provided between the cooling water inner tube and the cooling water outer tube, a cooling water outlet cavity is formed between the cooling water outer tube and the cooling water spacer, a cooling water inlet cavity is formed between the cooling water inner tube and the cooling water spacer, the cooling water inlet cavity is connected to the cooling water inlet pipeline, and the cooling water outlet cavity is connected to the cooling water outlet pipeline; The burner head is as follows: a fuel gas nozzle is arranged at the fire end of the fuel gas sleeve, an ignition oxygen nozzle is arranged at the fire end of the ignition oxygen sleeve, the ignition oxygen nozzle and the end of the fuel gas nozzle are connected to form a jacket, an oxygen spray hole is processed on the ignition oxygen nozzle, a coal powder nozzle is arranged at the fire end of the coal powder sleeve, a cooling water jacket is arranged at the fire end of the cooling water inner pipe and the cooling water outer pipe, a cooling water baffle is arranged in the cooling water jacket, and the cooling water baffle is connected to the fire end of the cooling water baffle.

[0008] The back-fire end of the cooling water outer pipe of the present invention is provided with a mounting flange, and the end of the mounting flange is provided with a fourth connecting pipe, the fourth connecting pipe is connected to the cooling water cavity, the fourth connecting pipe is symmetrically provided with a cooling water inlet pipe and a cooling water outlet pipe, the fourth connecting pipe is connected to the third connecting pipe, the third connecting pipe is connected to the process oxygen channel, the third connecting pipe is provided with a process oxygen inlet pipe, the end of the third connecting pipe is connected to the first flange, the first flange is sleeved on the back-fire end of the coal powder pipeline and is connected to the coal powder channel, the end of the first flange is provided with a second flange, the end of the second flange is provided with a second connecting pipe, and the front end of the second connecting pipe is connected to the ignition oxygen The gas casing forms a coal powder channel, a coal powder inlet pipe is arranged on the second connecting pipe and is connected to the coal powder channel, a sixth flange is arranged on the end of the second connecting pipe, an ignition oxygen channel is formed by the rear end of the second connecting pipe, the sixth flange and the fuel gas casing, an ignition oxygen inlet pipe is arranged on the second connecting pipe and is connected to the ignition oxygen channel, a fifth flange is arranged on 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 and the ignition gun installation pipe, the fuel gas pipeline, the first connecting pipe and the fourth flange, and the fuel gas inlet pipeline is arranged on the fifth flange and is connected to the fuel gas channel.

[0009] A communicating vessel is arranged between the burner head and the burner body of the present invention.

[0010] The communicating vessel of the present invention is as follows: a mounting hole is processed in the middle of the communicating vessel body, the inside of the mounting hole is connected to the outer wall of the ignition oxygen sleeve through a positioning block, and the communicating vessel body is processed with a process oxygen connecting hole, a cooling water inlet connecting hole, and a cooling water outlet connecting hole in sequence from the inside to the outside of the communicating vessel body in radial direction, and the process oxygen connecting holes are evenly arranged in 4 groups within a 360° phase, and the center line of each group of process oxygen connecting holes is a 1 / 4 arc, and several groups of cooling water inlet connecting holes and cooling water outlet connecting holes are evenly arranged within a 360° phase, and each group of cooling water inlet connecting holes or cooling water outlet connecting holes is a circular through hole whose center line is parallel to the center line of the communicating vessel body.

[0011] In the process oxygen channel of the present invention, 2 to 6 groups of oxygen cyclones are evenly distributed in a 360° phase near the fire end. The oxygen cyclone is a fin structure evenly distributed along the circumference, and the thickness of the fin is 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. A coal powder cyclone is arranged in the coal powder channel, and the coal powder cyclone is a spiral strip arranged circumferentially along the outer wall of the ignition oxygen casing.

[0012] The inner side of the cooling water jacket of the present invention is formed by a cylindrical surface and an inwardly converging conical surface. The inner side of the coal powder nozzle is a cylindrical surface. The middle part of the outer side of the coal powder nozzle is a cylindrical surface, and the two ends are inwardly converging conical surfaces. The conical surface of the coal powder nozzle toward the fire end is parallel to the conical surface of the cooling water jacket 3 to form a process oxygen channel. The outer side of the ignition oxygen nozzle is a cylindrical surface, the end toward the fire end is a vertical surface, and the inner side is a conical surface that spreads outward. Two circles of oxygen are concentrically processed on the conical surface. The center line of the oxygen nozzle hole is perpendicular to the conical surface of the ignition oxygen nozzle. The fire end of the fuel gas nozzle is a cylindrical structure, the middle part is an outwardly diffused conical structure, and the back-fire end is a cylindrical structure. The outer side of the ignition gun limit head is formed by a cylindrical surface and an outwardly diffused conical surface. The cylindrical surface of the fire end of the fuel gas nozzle is consistent in length with the cylindrical surface of the outer side of the ignition gun limit head, and the conical surface of the fuel gas nozzle is parallel to the conical surface of the ignition gun limit head to form a fuel gas channel.

[0013] The angle α between the conical surface of the ignition oxygen nozzle and the center line of the burner body of the present invention is 30°-60°, the angle γ between the conical surface of the cooling water jacket and the center line of the burner body is 20°-40°, and the angle β between the conical surface of the fuel gas nozzle and the center line of the burner body is 10°-30°.

[0014] The distance L1 between the end of the ignition gun limit head and the end face of the ignition oxygen nozzle is 10-20 mm, the distance L2 between the end of the ignition oxygen nozzle and the end of the coal powder nozzle is 1-5 mm, and the distance L3 between the end of the coal powder nozzle and the end of the cooling water jacket is 1-6 mm.

[0015] The back-fire end of the cooling water inner pipe of the present invention is provided with a first corrugated pipe, and the back-fire end of the ignition oxygen sleeve is provided with a second corrugated pipe.

[0016] The ignition method of the integrated pulverized coal burner of the present invention comprises the following steps: S1. After the ignition gun discharges for 2 seconds, the fuel gas and ignition oxygen are introduced simultaneously; S2, the ignition gun continues to discharge for 5 to 20 seconds, the flame detector detects the flame signal, the ignition gun stops discharging, and the fuel gas and ignition oxygen increase the temperature and pressure of the gasifier; S3. After the start-up conditions are met, pulverized coal and process oxygen are added to start normal production, and the flame in the furnace can be continuously seen by the video fire inspection.

[0017] The present invention integrates multiple key functions such as flame detection, ignition gun, start-up fuel gas, start-up oxygen, process pulverized coal, process oxygen and so on into a single device. Through the integrated design, the installation process is greatly simplified. Only one installation operation is required to complete the installation task of traditional multiple components, which significantly shortens the installation time, reduces the installation difficulty, and greatly reduces the possibility of installation errors and failures. In addition, the compact layout of the equipment effectively reduces the floor space, optimizes the space utilization of the production site, and makes the production layout more reasonable and efficient. In actual production operation, the integrated pulverized coal burner can accurately control the supply and mixing ratio of each medium through process adjustment. In the ignition stage, the ignition gun, start-up fuel gas and start-up oxygen work together to achieve rapid and stable ignition start-up. At the same time, the flame detection device monitors the flame state in real time and accurately, and immediately feedbacks once an abnormality occurs, providing reliable safety guarantee for the ignition process. Entering the normal production stage, the process pulverized coal and process oxygen are accurately mixed according to the preset ratio and fully burned, which significantly improves the combustion efficiency, reduces energy consumption, reduces pollutant emissions, and comprehensively improves the economic and environmental benefits of the production process. At the same time, the integrated design greatly simplifies the maintenance work. Only overall inspection and maintenance of a single device is required, and the maintenance time, manpower input and parts replacement costs can be effectively controlled. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 yes Figure 1 Another connection method for the burner head.

[0020] Figure 3 yes Figure 1 Schematic diagram of the structure of the connecting vessel 2.

[0021] Figure 4 yes Figure 3 Left view of .

[0022] In the figure: 1. high temperature resistant wire; 2. connecting vessel; 3. cooling water jacket; 4. cooling water baffle; 5. fuel gas nozzle; 6. ignition gun; 7. ignition gun limiter; 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 casing; 15. ignition oxygen casing; 16. fuel gas casing; 17. ignition gun mounting pipe; 18. fire detection pipe; 19. mounting flange; 20. cooling water inlet pipe; 21. first bellows; 22. process oxygen inlet pipe; 23. first flange; 24. second flange; 25. pulverized coal Powder inlet pipe; 26. Second bellows; 27. Fuel gas inlet pipe; 28. Fire detection interface; 29. ​​Ignition gun interface; 30. Third flange; 31. Fourth flange; 32. First connecting pipe; 33. Fifth flange; 34. Sixth flange; 35. Ignition oxygen inlet pipe; 36. Second connecting pipe; 37. Third connecting pipe; 38. Cooling water outlet pipe; 39. Fourth connecting pipe; 40. Oxygen cyclone; 41. Coal powder cyclone; 2-1. Mounting hole; 2-2. Connecting vessel body; 2-3. Process oxygen connecting hole; 2-4. Cooling water inlet connecting hole; 2-6. Cooling water outlet connecting hole. DETAILED DESCRIPTION

[0023] The present invention is 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 to 4The integrated pulverized coal burner of the present invention comprises a burner head and a burner body, wherein the burner body comprises a cooling water outer pipe 11, a cooling water spacer 12, a cooling water inner pipe 13, a pulverized coal sleeve 14, an ignition oxygen sleeve 15, a fuel gas sleeve 16, an ignition gun mounting pipe 17, a fire detection pipe 18, a mounting flange 19, a cooling water inlet pipe 20, a first bellows 21, a process oxygen inlet pipe 22, a first flange 23, a second flange 24, a pulverized coal inlet pipe 25, a second bellows 26, a fuel gas inlet pipe 27, a fire detection interface 28, an ignition gun interface 29, a third flange 30, and a fourth flange 31. , a first connecting pipe 32, a fifth flange 33, a sixth flange 34, an ignition oxygen inlet pipe 35, a second connecting pipe 36, a third connecting pipe 37, a cooling water outlet pipe 38, and a fourth connecting pipe 39 are connected to form an ignition gun mounting pipe 17. An ignition gun 6 is arranged 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 fire detection pipe 18 is arranged at the center of the ignition gun mounting pipe 17. A third flange 30 is arranged at the end of the fire detection pipe 18. A fourth flange 31 is arranged at the end of the ignition gun mounting pipe 17. The third flange 30 is connected to the fourth flange 31. The fire detection interface 28 is connected to the fire detection pipe 18 through the third flange 30. The ignition gun interface 29 is connected to the ignition gun mounting tube 17 through 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, and the other end is connected to the ignition wiring plug. The ignition gun mounting tube 17 is provided with a fuel gas sleeve 16, an ignition oxygen sleeve 15, a coal powder sleeve 14, a cooling water inner tube 13, and a cooling water outer tube 11 in sequence. A fuel gas channel is formed between the ignition gun mounting tube 17 and the fuel gas sleeve 16, an ignition oxygen channel is formed between the fuel gas sleeve 16 and the ignition oxygen sleeve 15, and an ignition oxygen sleeve 15 and the coal powder sleeve 14 are connected to the ignition gun mounting tube 17. A coal powder channel is formed between the powder sleeves 14, a process oxygen channel is formed between the coal powder sleeve 14 and the cooling water inner tube 13, a first bellows 21 is provided at the back-fire end of the cooling water inner tube 13, the first bellows 21 is used to release the pipeline thermal stress caused by temperature changes, a cooling water partition 12 is provided between the cooling water inner tube 13 and the cooling water outer tube 11, a cooling water outlet cavity is formed between the cooling water outer tube 11 and the cooling water partition 12, a cooling water inlet cavity is formed between the cooling water inner tube 13 and the cooling water partition 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, a mounting flange 19 is provided at the back-fire end of the cooling water outer pipe 11, and 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, and a cooling water inlet pipe 20 and a cooling water outlet pipe 38 are symmetrically provided on the fourth connecting pipe 39. The fourth connecting pipe 39 is connected to the third connecting pipe 37, and the third connecting pipe 37 is connected to the process oxygen channel. The third connecting pipe 37 is provided with a process oxygen inlet pipe 22, and the end of the third connecting pipe 37 is connected to the first flange 23. The first flange 23 is sleeved on the back-fire end of the pulverized coal pipeline 14 and is connected to the pulverized coal channel 14. A second flange 24 is provided at the end of the first flange 23, and 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, and a second bellows 26 is provided at the back-fire end of the ignition oxygen sleeve 15. The second bellows 26 is used to release the thermal stress of the pipeline 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 casing 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 and the ignition gun installation pipe 17, the fuel gas pipeline 16, the first connecting pipe 32 and the fourth flange 31. The fuel gas inlet pipe 27 is provided on the fifth flange 33 and is connected to the fuel gas channel.

[0026] The burner head of the present embodiment 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 sleeve 16 is provided with a fuel gas nozzle 5 at the fire end, and the ignition oxygen sleeve 15 is provided with an ignition oxygen nozzle 8 at the fire end. The ignition oxygen nozzle 8 and the end of the fuel gas nozzle 5 are connected to form a jacket. The ignition oxygen nozzle 8 is processed with oxygen spray holes. The pulverized coal sleeve 14 is provided with a pulverized coal nozzle 9 at the fire end. The cooling water inner pipe 13 and the cooling water outer pipe 11 are provided with a cooling water jacket 3 at the fire end. A cooling water baffle 4 is provided in the cooling water jacket 3. The cooling water baffle 4 is connected to the fire 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 flow to pass through.

[0027] Specifically, the inner side surface of the cooling water jacket 3 of the present embodiment is formed by a cylindrical surface and an inwardly converging conical surface, the inner side surface of the pulverized coal nozzle 9 is a cylindrical surface, the middle part of the outer side 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 toward the fire end is parallel to the conical surface of the cooling water jacket 3 to form a process oxygen channel, because the process oxygen axially enters the burner head and then tilts inwardly to be sprayed out, and the pulverized coal channel formed by the ignition oxygen nozzle 8 and the pulverized coal nozzle 9 causes the pulverized coal to be sprayed axially, this structure allows the high-speed flowing oxygen to shear the axially flowing pulverized coal, so that the process oxygen and the 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 can make the process oxygen better shear the pulverized coal and fully mix with the pulverized coal without flushing the gasifier furnace wall, the distance L3 between the end of the pulverized coal nozzle 9 and the end of the cooling water jacket 3 is 4 mm, this distance allows the pulverized coal to be mixed with the process oxygen before being sprayed out of the burner end. The outer side surface of the ignition oxygen nozzle 8 is a cylindrical surface, the end facing the fire is a vertical surface, and the inner side is a conical surface that diffuses outward. Two circles of oxygen nozzle holes are concentrically processed on the conical surface, and the center line of the oxygen nozzle is 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°, so that the ignition oxygen is mixed with the fuel gas within a shorter distance, which improves the ignition success rate and is not easy to burn the burner head. The distance L2 between the end of the ignition oxygen nozzle 8 and the end of the coal powder nozzle 9 is 3 mm. This distance can effectively prevent the ignition oxygen nozzle from burning when the process oxygen and coal powder are mixed and burned. The fuel gas nozzle 5 has a cylindrical structure at the fire end, a conical structure that diffuses outwards in the middle, and a cylindrical structure at the back fire end. The angle β between the conical surface of the fuel gas nozzle 5 and the center line of the burner body is 18°. The outer side of the ignition gun limit head 7 is formed by a cylindrical surface and a conical surface that diffuses outwards. The length of the cylindrical surface of the fuel gas nozzle 5 at the fire end is consistent with that of the outer cylindrical surface of the ignition gun limit head 7. The conical surface of the fuel gas nozzle 5 is parallel to the conical surface of the ignition gun limit head 7 to form a fuel gas channel. After the fuel gas enters the burner head axially, it passes through The conical surface is accelerated and then ejected axially. The flow velocity of the fuel gas after ejection is increased by shrinking the fuel gas outlet area. The oxygen enters the burner head axially and then is ejected inwardly. The direction in which the oxygen is ejected forms an acute angle with the direction in which the fuel gas is ejected, so that the fuel gas and oxygen can be fully mixed, thereby improving the ignition success rate and preventing flameout under high load. The distance L1 between the end of the ignition gun limit head 7 and the end face of the ignition oxygen nozzle 8 is 15 mm, and an ignition oxygen and fuel gas premixing zone is formed within the distance between the ignition oxygen nozzle 8 and the ignition gun limit 7.

[0028] The ignition method of the above-mentioned integrated pulverized coal burner consists of the following steps: S1, after the ignition gun 6 discharges for 2S, the fuel gas and ignition oxygen are introduced at the same time; S2, the ignition gun 6 continues to discharge for 5 to 20 seconds, the flame detector detects the flame signal, the ignition gun 6 stops discharging, and the fuel gas and ignition oxygen increase the temperature and pressure of the gasifier; S3. After the start-up conditions are met, pulverized coal and process oxygen are added to start normal production, and the flame in the furnace can be continuously seen by the video fire inspection. Example 2

[0029] In the above-mentioned embodiment 1, a communicating vessel 2 is arranged between the burner head and the burner body of this embodiment, and the communicating vessel 2 includes a communicating vessel body 2-2, and a mounting hole 2-1 is processed in the middle of the communicating vessel body 2-2. The inside 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 annular gap of the coal powder channel to be uniform. The communicating vessel body 2-2 is radially processed with process oxygen connecting holes 2-3, cooling water inlet connecting holes 2-4, and cooling water outlet connecting holes 2-5 in sequence from the inside to the outside. The process oxygen connecting holes 2-3 are evenly arranged in 4 groups within a 360° phase, and the center line of each group of process oxygen connecting holes 2-5 is a 1 / 4 arc. The cooling water inlet connecting holes 2-4 and the cooling water outlet connecting holes 2-5 are evenly arranged in several groups within a 360° phase, and each group of cooling water inlet connecting holes 2-4 or cooling water outlet connecting holes 2-5 is a circular through hole whose center line is parallel to the center line of the communicating vessel body 2-2, so as to ensure the uniformity of each channel. The remaining components and their connection relationships are the same as those in Example 1. Example 3

[0030] In the above-mentioned embodiment 1, 2 to 6 groups of oxygen cyclones 40 are evenly arranged in the process oxygen channel of this embodiment near the fire end within a 360° phase. The oxygen cyclone 40 is a fin structure evenly distributed along the circumference, and the thickness of the fin is 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, which can make the oxygen fully swirl in the channel and then spray out of the burner. A coal powder cyclone 41 is arranged in the coal powder channel. The coal powder cyclone 41 is a spiral strip arranged along the circumference of the outer wall of the ignition oxygen sleeve 15. The purpose of the spiral strip is to make the coal powder swirl and then spray out, and fully mix with oxygen for combustion. The remaining components and the connection relationship of the components are the same as those in embodiment 1. Example 4

[0031] In the above-mentioned embodiments 1 to 3, the angle α between the conical surface of the ignition oxygen nozzle 8 of this embodiment 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 limit head 7 and the end face of the ignition oxygen nozzle 8 is 10 mm, the distance L2 between the end of the ignition oxygen nozzle 8 and the end of the coal powder nozzle 9 is 1 mm, the distance L3 between the end of the coal powder nozzle 9 and the end of the cooling water jacket 3 is 1 mm, and the remaining components and the connection relationship of the components are the same as those in Embodiment 1. Example 5

[0032] In the above-mentioned embodiments 1 to 3, the angle α between the conical surface of the ignition oxygen nozzle 8 of this embodiment 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 limit head 7 and the end face of the ignition oxygen nozzle 8 is 20 mm, the distance L2 between the end of the ignition oxygen nozzle 8 and the end of the coal powder nozzle 9 is 5 mm, the distance L3 between the end of the coal powder nozzle 9 and the end of the cooling water jacket 3 is 6 mm, and the remaining components and the connection relationship of the components are the same as those in Embodiment 1.

Claims

1. An integrated pulverized coal burner, comprising a burner head and a burner body, characterized in that The burner body comprises: an ignition gun (6) is arranged at the left end of an ignition gun mounting tube (17), the ignition gun (6) is limited by an ignition gun limiting head (7), a fire detection tube (18) is arranged at the center of the ignition gun mounting tube (17), a third flange (30) is arranged at the end of the fire detection tube (18), a fourth flange (31) is arranged at the end of the ignition gun mounting tube (17), the third flange (30) and the fourth flange (31) are connected, and a fire detection interface (28) is connected to the fire detection tube (18) through the third flange (30). The ignition gun interface (29) is connected to the ignition gun mounting tube (17) through 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. The ignition gun mounting tube (17) is provided with a fuel gas sleeve (16), an ignition oxygen sleeve (15), a coal powder sleeve (14), a cooling water inner tube (13), and a cooling water outer tube (11) in sequence. A fuel gas channel is formed between the lance mounting tube (17) and the fuel gas sleeve (16), and the fuel gas channel is connected to the fuel gas inlet pipe (27). An ignition oxygen channel is formed between the fuel gas sleeve (16) and the ignition oxygen sleeve (15), and the ignition oxygen channel is connected to the ignition oxygen inlet pipe (22). A pulverized coal channel is formed between the ignition oxygen sleeve (15) and the pulverized coal sleeve (14), and the pulverized coal channel 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 the inner cooling water tube (13) and the outer cooling water tube (11), the process oxygen channel is connected to the process oxygen inlet pipe (22), a cooling water spacer (12) is provided between the inner cooling water tube (13) and the outer cooling water tube (11), a cooling water outlet cavity is formed between the outer cooling water tube (11) and the cooling water spacer (12), a cooling water inlet cavity is formed between the inner cooling water tube (13) and the cooling water spacer (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); The burner head comprises: a fuel gas nozzle (5) is arranged at the fire end of the fuel gas sleeve (16); an ignition oxygen nozzle (8) is arranged at the fire end of the ignition oxygen sleeve (15); the ignition oxygen nozzle (8) and the end of the fuel gas nozzle (5) are connected to form a jacket; an oxygen nozzle hole is processed on the ignition oxygen nozzle (8); a coal powder nozzle (9) is arranged at the fire end of the coal powder sleeve (14); a cooling water jacket (3) is arranged at the fire end of the cooling water inner pipe (13) and the cooling water outer pipe (11); a cooling water baffle (4) is arranged in the cooling water jacket (3); and the cooling water baffle (4) is connected to the fire end of the cooling water baffle (12).

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

3. The integrated pulverized coal burner according to claim 1 is 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 is characterized in that The communicating vessel (2) comprises: a mounting hole (2-1) is processed in the middle of a communicating vessel body (2-2); the inside of the mounting hole (2-1) is connected to the outer wall of an ignition oxygen sleeve (15) via a positioning block (10); a process oxygen connecting hole (2-3), a cooling water inlet connecting hole (2-4), and a cooling water outlet connecting hole (2-5) are processed in sequence from the inside to the outside of the communicating vessel body (2-2); four groups of process oxygen connecting holes (2-3) are evenly distributed within a 360° phase, and the center line of each group of process oxygen connecting holes (2-5) is a quarter arc; a plurality of groups of cooling water inlet connecting holes (2-4) and cooling water outlet connecting holes (2-5) are evenly distributed within a 360° phase, and each group of cooling water inlet connecting holes (2-4) or cooling water outlet connecting holes (2-5) is a circular through hole whose center line is parallel to the center line of the communicating vessel body (2-2).

5. The integrated pulverized coal burner according to claim 1 is characterized in that: Two to six groups of oxygen cyclones (40) are evenly distributed in a 360° phase in the process oxygen channel near the fire end. The oxygen cyclone (40) is a fin structure evenly distributed along the circumference. The thickness of the fin is 2 to 5 mm. The number of fins is 4 to 40. Each fin has an angle of 10 to 40 degrees with the axial direction. A coal powder cyclone (41) is provided in the coal powder channel. The coal powder cyclone (41) is a spiral strip arranged along the circumference of the outer wall of the ignition oxygen sleeve (15).

6. The integrated pulverized coal burner according to claim 1, characterized in that: The inner side of the cooling water jacket (3) is formed by a cylindrical surface and an inwardly converging conical surface, the inner side of the pulverized coal nozzle (9) is a cylindrical surface, the middle of the outer side 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) facing the fire end is parallel to the conical surface of the cooling water jacket (3) to form a process oxygen channel, the outer side of the ignition oxygen nozzle (8) is a cylindrical surface, the end facing the fire end is a vertical surface, and the inner side is an outwardly diffusing conical surface, and two circles of oxygen spray holes are concentrically processed on the conical surface The center line of the oxygen nozzle hole is perpendicular to the conical surface of the ignition oxygen nozzle (8); the fire-facing end of the fuel gas nozzle (5) is a cylindrical structure, the middle part is an outwardly diffused conical structure, and the back-fire end is a cylindrical structure; the outer side of the ignition gun limit head (7) is formed by a cylindrical surface and an outwardly diffused conical surface; the length of the cylindrical surface of the fire-facing end of the fuel gas nozzle (5) is consistent with the outer cylindrical surface of the ignition gun limit head (7); the conical surface of the fuel gas nozzle (5) is parallel to the conical surface of the ignition gun limit 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 limit head 7 and the end face of the ignition oxygen nozzle (8) is 10 to 20 mm, the distance L2 between the end of the ignition oxygen nozzle (8) and the end of the coal powder nozzle (9) is 1 to 5 mm, and the distance L3 between the end of the coal powder nozzle (9) and the end of the cooling water jacket (3) is 1 to 6 mm.

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

10. The ignition method of the integrated pulverized coal burner according to claim 1 is characterized in that It consists of the following steps: S1, after the ignition gun (6) discharges for 2 seconds, the fuel gas and ignition oxygen are introduced simultaneously; S2, the ignition gun (6) continues to discharge for 5 to 20 seconds, the flame detector detects a flame signal, the ignition gun (6) stops discharging, and the fuel gas and ignition oxygen increase the temperature and pressure of the gasifier; S3. After the start-up conditions are met, pulverized coal and process oxygen are added to start normal production, and the flame in the furnace can be continuously seen by the video fire inspection.

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