Combined medium speed coal pulverizer separator

Abstract

The application discloses a combined medium-speed coal mill powder separator and relates to the technical field of coal mill powder separators.The combined medium-speed coal mill powder separator comprises a separator body, maintenance openings are arranged on the two sides of the separator body, first hinged seats are fixedly installed on the outer sides of the separator body and below the maintenance openings, maintenance doors are rotatably installed on the inner sides of the first hinged seats, mounting plates are fixedly installed on one side of the maintenance doors, the mounting plates are matched with the maintenance openings, mounting shafts are arranged on one side of the mounting plates, grinding rollers are arranged on one end of the mounting shafts, maintenance platforms are fixedly installed on the two sides of the separator body and below the first hinged seats, and the combined medium-speed coal mill powder separator has the beneficial effects that when a grinding roller in the separator is damaged and needs to be repaired and replaced, the grinding roller can be repaired alone, the maintenance openings are closed through the closing doors, and the combined medium-speed coal mill powder separator does not need to be stopped and waited during the repairing process, thereby effectively avoiding the situation that the combined medium-speed coal mill powder separator needs to be started only after the repairing is completed, and avoiding the situation that an unexpected situation influences the grinding efficiency.

Description

Technical Field

[0001] This invention relates to the field of pulverized coal separator technology, specifically a combined medium-speed pulverized coal separator. Background Technology

[0002] The static separator in a medium-speed mill is used to separate the dust particles from the material that has been ground in the mill and then transported by high-speed primary air. Through collision and changes in the direction of material movement, it separates large particles that do not meet the requirements and returns them for regrinding, allowing only the fine powder that meets the requirements to pass through. The static separator has a simple structure, reliable and simple sealing, requires no sealing air or additional energy consumption, and has some adjustment capabilities, making it widely used in coal mills in thermal power plants. However, due to the unsatisfactory separation effect of existing static separators, the output powder is relatively coarse, which is detrimental to combustion and energy conservation. With increasing energy conservation and environmental protection requirements and the increasing size of thermal power generating units, the requirements for coal powder fineness are higher, thus limiting the use of static separators.

[0003] According to a pre-separation combined medium-speed coal powder separator with application number 202122152506.2, an additional pre-separation baffle is added, which cooperates with the pre-separation inner cone to perform preliminary separation of coarser coal powder particles, making the coal powder finer. However, the above separator has certain defects. During the pre-separation, larger particles remain in the groove of the V-shaped plate. Relying solely on its own tilt angle, it is not possible to effectively allow the larger particles in the groove to fall back onto the grinding disc for grinding. Therefore, we propose a combined medium-speed coal powder separator.

[0004] Currently, existing medium-speed coal powder separators mainly grind coal into fine powder through the cooperation of grinding rollers and grinding discs. This leads to frequent maintenance and inspection of the grinding rollers in order to meet the requirements of coal powder fineness. In addition, during the grinding process, the coal contains impurities such as stones and metals, which can easily damage the grinding rollers during operation. They need to be repaired or replaced before they can be used. However, when the current separator needs to repair the grinding rollers in case of emergencies, it is necessary to stop the machine for replacement, and the replacement time is long, which affects the grinding efficiency. Therefore, we propose a combined medium-speed coal powder separator. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a combined medium-speed coal pulverizer separator, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a combined medium-speed coal pulverizer separator, comprising a separator body, maintenance ports on both sides of the separator body, a first hinge seat fixedly installed on the outer side of the separator body and below the maintenance ports, a maintenance door rotatably installed on the inner side of the first hinge seat, an mounting plate fixedly installed on one side of the maintenance door, the mounting plate cooperating with the maintenance port, an mounting shaft provided on one side of the mounting plate, a grinding roller provided at one end of the mounting shaft, and maintenance platforms fixedly installed on both sides of the separator body and at the bottom of the first hinge seats. The maintenance platform has a guide groove inside, a guide rod is fixedly installed inside the guide groove, and a guide block is slidably installed on the outside of the guide rod. A through groove is opened inside the maintenance platform below the guide groove. A connecting block is fixedly installed at the bottom of the guide block and is slidably connected to the through groove. First hydraulic rods are fixedly installed on both sides of the separator body below the maintenance platform. The output end of the first hydraulic rod is fixedly connected to the connecting block. A connecting rod is movably installed on the top of the guide block. A slider is movably installed at one end of the connecting rod. A sliding groove is opened inside one side of the maintenance door, and the slider is slidably connected to the sliding groove.

[0007] Preferably, a second hinge seat is fixedly installed on both sides of the separator body and above the maintenance port. A closed door is rotatably installed on the inner side of the second hinge seat. A first rotating shaft is fixedly installed on both sides of the closed door. The first rotating shaft is rotatably connected to the second hinge seat. A gear is fixedly installed at one end of one of the first rotating shafts. A second hydraulic rod is fixedly installed on both sides of the separator body. A rack is fixedly installed at the output end of the second hydraulic rod. The rack meshes with the gear. A sealing plate is fixedly installed on one side of the closed door. The closed door and the sealing plate cooperate with the maintenance port.

[0008] Preferably, a powder return inner cone is provided inside the separator body and above the grinding disc, and a first air duct is provided inside the separator body and outside the powder return inner cone. Several separation baffles are fixedly installed on the inner wall of the separator body and inside the first air duct. A V-shaped plate is fixedly installed at the bottom of each separation baffle, and a separation groove is formed on the inner side of the V-shaped plate. Several second rotating shafts are rotatably installed inside the separation baffles, and pulleys are fixedly installed at both ends of each second rotating shaft. An impeller is fixedly installed on one side of one pulley, and a drive belt is installed on the outer side of the pulley. Two mounting rods are fixedly installed on the outer side of the drive belt, and a scraper is fixedly installed at one end of each mounting rod. The scraper cooperates with the separation groove. Several separation holes are formed inside the powder return inner cone, and the separation groove and scraper cooperate with the separation holes.

[0009] Preferably, a damper is provided at the bottom of the separator body, a grinding disc is provided at the bottom inside the separator body, the grinding roller cooperates with the grinding disc, an air ring is provided inside the separator body and outside the grinding disc, and an air inlet is provided inside the separator body and inside the grinding disc and air ring.

[0010] Preferably, a second air duct is provided at the top of the powder return inner cone, a powder outlet pipe is provided at the top of the separator body and inside the powder return inner cone, and a return port is provided at the bottom of the powder return inner cone, the return port cooperating with the grinding disc.

[0011] Preferably, a feed pipe is provided on one side of the separator body, the feed pipe cooperates with the grinding disc, and a distribution pipe is provided at the bottom of the separator body and on one side of the damper, one end of the distribution pipe extends into the interior of the feed pipe.

[0012] Preferably, the maintenance door is used in conjunction with the maintenance platform.

[0013] Preferably, the guide block is slidably connected to the guide groove, and the guide groove has a hole inside that mates with the guide rod.

[0014] Preferably, the rack is slidably connected to the separator body, and the outer side of the separator body has a groove that mates with the rack.

[0015] Preferably, one side of the separation baffle is fixedly connected to the outer side of the powder return inner cone, and several separation baffles are arranged at equal intervals at an angle.

[0016] This invention provides a combined medium-speed coal pulverizer separator, which has the following advantages:

[0017] 1. In this combined medium-speed coal powder separator, when one of the grinding rollers inside the separator is damaged and needs to be repaired or replaced, it can be repaired separately. The maintenance port can be closed by sealing the door, and there is no need to stop the machine during the maintenance process. This effectively avoids the need to wait for the maintenance to be completed before starting the machine, and avoids the impact of sudden situations on grinding efficiency.

[0018] 2. This combined medium-speed coal powder separator, through the cooperation of a second rotating shaft, impeller blades, pulley, drive belt, mounting rod, scraper, and separation hole, pre-separates large coal powder particles when the coal powder rises by air force. The large coal powder particles fall into the separation tank. The impeller blades are rotated by air force, which drives the second rotating shaft, pulley, and drive belt to rotate together. The mounting rod and scraper on the outside of the drive belt scrape the coal powder in the separation tank into the separation hole, and then it falls into the return powder cone and returns to the grinding zone for re-grinding through the return port, thereby improving the fineness of the coal powder. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a cross-sectional view of the present invention;

[0021] Figure 3 This is a side sectional view of the present invention;

[0022] Figure 4 For the present invention Figure 3 Enlarged view of point A in the image;

[0023] Figure 5 For the present invention Figure 1 Enlarged view of point B in the image;

[0024] Figure 6 For the present invention Figure 2 Enlarged view of point C in the image;

[0025] Figure 7 This is a side view of the separation baffle of the present invention.

[0026] In the diagram: 1. Separator body; 2. Damper; 3. Grinding disc; 4. Air ring; 5. Air inlet; 6. Maintenance port; 7. Maintenance door; 8. Mounting plate; 9. Mounting shaft; 10. Grinding roller; 11. Maintenance platform; 12. Guide groove; 13. Guide rod; 14. Guide block; 15. Through groove; 16. Connecting block; 17. First hydraulic rod; 18. Connecting rod; 19. Sliding block; 20. Second hinge seat; 21. Sealing door; 22. First rotating shaft; 23. Gear; 24. ... 25. Hydraulic rod; 26. Rack; 27. Sealing plate; 28. First hinge seat; 29. ​​Slide groove; 30. Powder return inner cone; 31. First air duct; 32. Second air duct; 33. Powder outlet pipe; 34. Return port; 35. Separation baffle; 36. V-shaped plate; 37. Separation groove; 38. Second rotating shaft; 39. Impeller blade; 40. Pulley; 41. Drive belt; 42. Mounting rod; 43. Scraper; 44. Separation hole; 45. Feed pipe; 46. Air distribution pipe. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Please see Figures 1 to 7This invention provides a technical solution: a combined medium-speed coal powder separator, comprising a separator body 1, an air damper 2 at the bottom of the separator body 1, a grinding disc 3 at the bottom inside the separator body 1, a grinding roller 10 cooperating with the grinding disc 3, an air ring 4 inside the separator body 1 and located outside the grinding disc 3, an air inlet 5 inside the separator body 1 and located inside the grinding disc 3 and the air ring 4, maintenance ports 6 on both sides of the separator body 1, a mounting shaft 9 on one side of a mounting plate 8, and a grinding roller 10 at one end of the mounting shaft 9. The air damper 2, grinding disc 3, air ring 4, air inlet 5, mounting shaft 9, and grinding roller 10 are all existing mechanisms in the prior art. A second air duct 31 is provided at the top of the return powder inner cone 29. A powder outlet pipe 32 is provided on the inner side of the powder return cone 29, and a return port 33 is provided at the bottom of the powder return cone 29. The return port 33 is matched with the grinding disc 3. The function of the second air duct 31 is to allow the rising coal powder to return, so that the fine coal powder is discharged through the powder outlet pipe 32. The large coal powder is separated from the fine coal powder by centrifugation when it flows downward and falls into the powder return cone 29 and then returns to the grinding area through the return port 33 for re-grinding. A feed pipe 44 is provided on one side of the separator body 1. The feed pipe 44 is matched with the grinding disc 3. A distribution pipe 45 is provided at the bottom of the separator body 1 and on one side of the air damper 2. One end of the distribution pipe 45 extends into the interior of the feed pipe 44. The function of the distribution pipe 45 is to blow the fine powder of the raw material added in the feed pipe 44 into the separator body 1.

[0029] A first hinge seat 27 is fixedly installed on the outer side of the separator body 1 and below the maintenance port 6. A maintenance door 7 is rotatably installed on the inner side of the first hinge seat 27. An installation plate 8 is fixedly installed on one side of the maintenance door 7 and cooperates with the maintenance port 6. Maintenance platforms 11 are fixedly installed on both sides of the separator body 1 and at the bottom of the first hinge seat 27. The maintenance door 7 cooperates with the maintenance platform 11. A guide groove 12 is opened inside the maintenance platform 11. A guide rod 13 is fixedly installed inside the guide groove 12. A guide block 14 is slidably installed on the outer side of the guide rod 13 and is slidably connected to the guide groove 12. A hole that cooperates with the guide rod 13 is opened inside the guide groove 12. A through groove 15 is opened inside the maintenance platform 11 and below the guide groove 12. A connecting block 16 is fixedly installed at the bottom of the guide block 14, and the connecting block 16 is slidably connected to the through groove 15. A first hydraulic rod 17 is fixedly installed on both sides of the separator body 1 and below the maintenance platform 11. The output end of the first hydraulic rod 17 is fixedly connected to the connecting block 16. A connecting rod 18 is movably installed on the top of the guide block 14, and a slider 19 is movably installed at one end of the connecting rod 18. A sliding groove 28 is opened inside one side of the maintenance door 7, and the slider 19 is slidably connected to the sliding groove 28. The main function of the guide groove 12, guide rod 13, guide block 14, through groove 15, connecting block 16, first hydraulic rod 17, connecting rod 18, slider 19, and sliding groove 28 is to drive the maintenance door 7 to open, thereby flipping the mounting shaft 9 and grinding roller 10 to the maintenance door. Above the protection platform 11, for easy inspection, replacement, and maintenance by staff, second hinge seats 20 are fixedly installed on both sides of the separator body 1 and above the maintenance port 6. A sealing door 21 is rotatably installed on the inner side of the second hinge seat 20. First rotating shafts 22 are fixedly installed on both sides of the sealing door 21, and are rotatably connected to the second hinge seat 20. A gear 23 is fixedly installed at one end of each first rotating shaft 22. Second hydraulic rods 24 are fixedly installed on both sides of the separator body 1. Both the first hydraulic rod 17 and the second hydraulic rod 24 are controlled by an external controller. A rack 25 is fixedly installed at the output end of the second hydraulic rod 24, and is slidably connected to the separator body 1. An opening is located inside the outer side of the separator body 1. The slot that mates with the rack 25 allows the rack 25 to mesh with the gear 23. A sealing plate 26 is fixedly installed on one side of the closed door 21. The closed door 21 and the sealing plate 26 mate with the maintenance port 6. A ladder for maintenance personnel to climb is provided on the outside of the separator body 1 and on one side of the maintenance platform 11, making it convenient for maintenance personnel to climb the maintenance platform 11 for maintenance and replacement. The main function of the second hinge seat 20, the closed door 21, the first rotating shaft 22, the gear 23, the second hydraulic rod 24, and the rack 25 is that when the maintenance door 7 is opened, the second hydraulic rod 24 drives the rack 25 to move so that it meshes with the gear 23, causing the closed door 21 to flip and close the maintenance port 6, thereby ensuring that the air pressure inside the separator body 1 is stable and does not affect its normal operation.

[0030] Inside the separator body 1 and above the grinding disc 3, a powder return inner cone 29 is provided. Inside the separator body 1 and outside the powder return inner cone 29, a first air duct 30 is provided. Several separation baffles 34 are fixedly installed on the inner wall of the separator body 1 and inside the first air duct 30. One side of each separation baffle 34 is fixedly connected to the outer side of the powder return inner cone 29. The separation baffles 34 are arranged at equal intervals and at an angle. A V-shaped plate 35 is fixedly installed at the bottom of each separation baffle 34. A separation groove 36 is formed on the inner side of the V-shaped plate 35. Several second rotating shafts 37 are rotatably installed inside each separation baffle 34. Pulleys 39 are fixedly installed at both ends of each second rotating shaft 37. An impeller blade 38 is fixedly installed on one side of each pulley 39. A drive belt 40 is installed on the outside, and two mounting rods 41 are fixedly installed on the outside of the drive belt 40. A scraper 42 is fixedly installed at one end of the mounting rod 41. The scraper 42 cooperates with the separation groove 36. Several separation holes 43 are opened inside the return powder inner cone 29. The separation groove 36 and the scraper 42 cooperate with the separation holes 43. The airflow blows onto the impeller blade 38, which can be made to rotate. At the same time, the larger coal powder particles in the airflow are separated from the fine coal powder particles and fall into the separation groove 36. Then, the mounting rods 41 and the scraper 42 are rotated along the path of the drive belt 40 by the rotation of the pulley 39 and the drive belt 40. The scraper 42 scrapes the large coal powder particles in the separation groove 36 back to the return powder inner cone 29 through the separation holes 43 and returns them to the grinding area.

[0031] In summary, in operation, this combined medium-speed coal powder separator allows hot air to enter the separator body 1 through the damper 2 and exit through the air inlet 5. Coal raw materials enter the separator body 1 through the feed pipe 44 and fall onto the grinding disc 3. The grinding rollers 10 and the grinding disc 3 grind the coal lumps. Through centrifugal force, the ground coal lumps are broken down into coal powder of different sizes, which moves outwards from the grinding disc 3. Simultaneously, the coal powder rises with the hot air and passes through the first air duct 30. During this rising process, the separation baffle 34 pre-separates the larger coal particles. Hot air blows the impeller 38 to rotate, which in turn drives the second shaft 37, pulley 39, and drive belt 40 to rotate. The mounting rod 41 on the outside of the drive belt 40 and the scraper 42 move in a cycle, which scrapes the large-particle coal powder in the separation tank 36 through the separation hole 43 into the return powder inner cone 29, and then falls back onto the grinding disc 3 through the return port 33 for further grinding. At this time, there are still some large-particle coal powder in the rising coal powder. When the hot air rises to the top of the return powder inner cone 29, it will flow downward into the second air duct 31 inside the return powder inner cone 29. The grinding roller 10 moves and rotates within the inner cone 29. Larger coal particles fall into the inner cone 29 due to centrifugal force and return to the grinding disc 3 through the return port 33. Finer coal particles are discharged through the outlet pipe 32. When the grinding roller 10 is damaged during grinding and needs replacement, stop the machine first. Then, open the first hydraulic rod 17. The first hydraulic rod 17 pushes the connecting block 16 and guide block 14 to move, which in turn moves the connecting rod 18 to open the maintenance door 7. When the grinding roller 10 is moved to the maintenance platform 11 outside the separator, the second hydraulic rod 24 is then activated, which drives the rack 25 to move. The rack 25 meshes with the gear 23, which drives the first rotating shaft 22 and the closed door 21 to rotate. The maintenance port 6 is then closed by the closed door 21 and the sealing plate 26, and the machine can then be started. The staff can then repair or replace the grinding roller 10. During the repair, one grinding roller 10 inside the separator body 1 will work but will not stop, and will not affect the operation.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A combined medium-speed coal pulverizer separator, comprising a separator body (1), characterized in that: Maintenance ports (6) are provided on both sides of the separator body (1). A first hinge seat (27) is fixedly installed on the outer side of the separator body (1) and below the maintenance port (6). A maintenance door (7) is rotatably installed on the inner side of the first hinge seat (27). An installation plate (8) is fixedly installed on one side of the maintenance door (7). The installation plate (8) cooperates with the maintenance port (6). An installation shaft (9) is provided on one side of the installation plate (8). A grinding roller (10) is provided at one end of the installation shaft (9). Maintenance platforms (11) are fixedly installed on both sides of the separator body (1) and at the bottom of the first hinge seat (27). A guide groove (12) is opened inside the maintenance platform (11). A guide rod (13) is fixedly installed inside the guide groove (12). A guide block (14) is slidably installed on the outer side of the guide rod (13). The maintenance platform (11) has a through groove (15) inside and below the guide groove (12). A connecting block (16) is fixedly installed at the bottom of the guide block (14). The connecting block (16) is slidably connected to the through groove (15). A first hydraulic rod (17) is fixedly installed on both sides of the separator body (1) below the maintenance platform (11). The output end of the first hydraulic rod (17) is fixedly connected to the connecting block (16). A connecting rod (18) is movably installed on the top of the guide block (14). A slider (19) is movably installed at one end of the connecting rod (18). A sliding groove (28) is opened inside one side of the maintenance door (7). The slider (19) is slidably connected to the sliding groove (28). A second hinge seat (20) is fixedly installed on both sides of the separator body (1) and above the maintenance port (6). A closed door (21) is rotatably installed on the inner side of the second hinge seat (20). A first rotating shaft (22) is fixedly installed on both sides of the closed door (21). The first rotating shaft (22) is rotatably connected to the second hinge seat (20). A gear (23) is fixedly installed at one end of the first rotating shaft (22). A second hydraulic rod (24) is fixedly installed on both sides of the separator body (1). A rack (25) is fixedly installed at the output end of the second hydraulic rod (24). The rack (25) meshes with the gear (23). A sealing plate (26) is fixedly installed on one side of the closed door (21). The closed door (21) and the sealing plate (26) cooperate with the maintenance port (6).

2. The combined medium-speed coal pulverizer separator according to claim 1, characterized in that: Inside the separator body (1) and above the grinding disc (3), there is a powder return inner cone (29). Inside the separator body (1) and outside the powder return inner cone (29), there is a first air duct (30). On the inner wall of the separator body (1) and inside the first air duct (30), there are several separation baffles (34). A V-shaped plate (35) is fixedly installed at the bottom of the separation baffle (34). A separation groove (36) is opened on the inner side of the V-shaped plate (35). Several second rotating shafts (37) are rotatably installed inside the separation baffle (34). Pulleys (39) are fixedly installed at both ends of the several second rotating shafts (37). An impeller blade (38) is fixedly installed on one side of one of the pulleys (39). A transmission belt (40) is installed on the outer side of the pulley (39). Two mounting rods (41) are fixedly installed on the outer side of the transmission belt (40). A scraper (42) is fixedly installed at one end of the mounting rod (41). The scraper (42) cooperates with the separation groove (36). Several separation holes (43) are opened inside the powder return cone (29). The separation groove (36) and the scraper (42) cooperate with the separation holes (43).

3. A combined medium-speed coal pulverizer separator according to claim 1, characterized in that: The bottom of the separator body (1) is provided with a damper (2), the bottom inside the separator body (1) is provided with a grinding disc (3), the grinding roller (10) cooperates with the grinding disc (3), the inside of the separator body (1) and the outside of the grinding disc (3) is provided with an air ring (4), and the inside of the separator body (1) and the inside of the grinding disc (3) and the air ring (4) is provided with an air inlet (5).

4. A combined medium-speed coal pulverizer separator according to claim 2, characterized in that: The top of the powder return inner cone (29) is provided with a second air duct (31), the top of the separator body (1) and the inner side of the powder return inner cone (29) are provided with a powder outlet pipe (32), the bottom of the powder return inner cone (29) is provided with a return port (33), and the return port (33) is matched with the grinding disc (3).

5. A combined medium-speed coal pulverizer separator according to claim 3, characterized in that: A feed pipe (44) is provided on one side of the separator body (1), and the feed pipe (44) cooperates with the grinding disc (3). A distribution pipe (45) is provided at the bottom of the separator body (1) and on one side of the damper (2), and one end of the distribution pipe (45) extends into the interior of the feed pipe (44).

6. A combined medium-speed coal pulverizer according to claim 1, characterized in that: The maintenance door (7) works in conjunction with the maintenance platform (11).

7. A combined medium-speed coal pulverizer according to claim 1, characterized in that: The guide block (14) is slidably connected to the guide groove (12), and the guide groove (12) has a hole inside that cooperates with the guide rod (13).

8. A combined medium-speed coal pulverizer according to claim 1, characterized in that: The rack (25) is slidably connected to the separator body (1), and the inside of the outer side of the separator body (1) is provided with a groove that cooperates with the rack (25).

9. A combined medium-speed coal pulverizer separator according to claim 2, characterized in that: One side of the separation baffle (34) is fixedly connected to the outer side of the powder return inner cone (29), and several separation baffles (34) are arranged at an inclined and equal interval.

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