Vertical pulverized coal corner tube boiler
By using the dust removal mechanism and heat exchange structure of the exhaust device in the coal powder corner tube boiler, the problem of smoke accumulation is solved, efficient smoke filtration and air preheating are achieved, and energy utilization efficiency is improved.
Patent Information
- Application Number
- CN202420295569.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-18
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-02-18
AI Technical Summary
In a coal powder corner tube boiler, the smoke and dust in the high-temperature flue gas will adhere to the inner walls of the high-temperature air preheater and the low-temperature air preheater, causing smoke and dust to accumulate, affecting the air preheating effect and causing environmental pollution.
A vertical coal powder corner tube boiler is designed, using a dust removal mechanism in the exhaust device, including a filter plate, a rotating ring, a scraper and a deflector, to filter and clean the smoke and dust in high-temperature flue gas and pass through the isolation. Structures such as plates, heat exchange pipes, magnetic blocks, baffles and troughs extend the time the air is in the heat exchange area and ensure the air preheating effect.
It effectively filters smoke and dust in high-temperature flue gas to prevent it from entering the air preheating area, extends the time the air is in the heat exchange area, improves the air preheating efficiency, reduces smoke accumulation, protects equipment and improves energy utilization efficiency.
Smart Images
Figure CN222164773U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of boilers, in particular to a vertical pulverized coal corner tube boiler. Background Art
[0002] The downcomer of the corner tube boiler is arranged at the corner, which not only serves as a water circulation channel but also a part of the boiler support frame, so this boiler is called a corner tube boiler.
[0003] When the pulverized coal corner tube boiler is in use, due to the combustion of pulverized coal, some high-temperature flue gas will be generated, and these high-temperature flue gases will also contain a large amount of smoke dust. If these high-temperature flue gases are directly discharged, on the one hand, the waste heat of the high-temperature flue gas will be wasted, which will cause a waste of resources to a certain extent, and on the other hand, it will cause environmental pollution;
[0004] For example, the "vertical pulverized coal corner tube boiler" with the authorization announcement number "CN 203203006 U" passes the flue gas into the high-temperature air preheater, economizer and low-temperature air preheater in sequence, and then is discharged into the external flue gas purification system. In the flue gas purification system, the solid particles in the flue gas are removed, and the high-temperature air preheater and the low-temperature air preheater can use the waste heat of the flue gas to preheat the air, thereby achieving the purpose of recycling and energy saving.
[0005] However, in actual use, when the high-temperature flue gas enters the high-temperature air preheater and the low-temperature air preheater to use the waste heat to preheat the air, the high-temperature flue gas contains smoke and dust that may adhere to the inner walls of the high-temperature air preheater and the low-temperature air preheater. After long-term use, the smoke and dust accumulate, affecting the effect of the high-temperature flue gas on preheating the air. Summary of the invention
[0006] The purpose of the utility model is to provide a vertical pulverized coal corner tube boiler, which can filter the high-temperature flue gas entering the heat exchange area to solve the problems raised in the above background technology.
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vertical pulverized coal corner tube boiler, comprising a boiler body and an exhaust gas device, the exhaust gas device is located on the right side of the boiler body, an exhaust pipe is inserted between the exhaust gas device and the boiler body, a burner is installed on the left side of the boiler body, a heat exchange box is fixedly connected to the inside of the exhaust gas device, an intake pipe is inserted at the bottom end of the heat exchange box, the bottom end of the intake pipe passes through the exhaust gas device, a gas pipe is inserted at the top end of the heat exchange box, the end of the gas pipe away from the heat exchange box is inserted with the burner, and a dust removal mechanism is arranged inside the exhaust gas device.
[0008] Preferably, the dust removal mechanism includes a filter plate fixedly connected to the inner wall of the exhaust device, and the dust removal mechanism also includes a rotating ring rotatably connected to the outside of the intake pipe, a small rod is fixedly connected to the top of the rotating ring, a mounting ring is fixedly connected to the top of the small rod, and a scraper is fixedly connected to the outer edge of the mounting ring.
[0009] Preferably, a blade is fixedly connected to the outer side of the rotating ring, and the top surface of the scraper is in contact with the bottom surface of the filter plate.
[0010] Preferably, a guide frame is fixedly connected to the inner wall of the bottom end of the tail gas device, the inner side of the guide frame is inclined, a slag discharge groove is opened at the bottom end of the tail gas device, and a rubber plug is provided at the slag discharge groove of the tail gas device.
[0011] Preferably, a circular ring is rotatably connected to the inner wall of the air intake duct, a mounting frame is fixedly connected to the inner side of the circular ring, a fan blade is fixedly connected to the top of the mounting frame, and the centers of the circular ring and the rotating ring are on the same cross section.
[0012] Preferably, the outer side of the circular ring and the inner side of the rotating ring are both fixedly connected with magnetic blocks.
[0013] Preferably, a partition is fixedly connected to the interior of the exhaust device, and the inner side of the partition is fixed to the heat exchange box. A heat exchange tube is inserted into the left top of the partition, and the end of the heat exchange tube away from the partition penetrates into the interior of the heat exchange box.
[0014] Preferably, the area where the heat exchange tube passes into the interior of the heat exchange box is composed of several horizontal tubes and several vertical tubes, baffles are fixedly connected between the several horizontal tubes, and empty grooves are opened on the top of the baffles, the outer sides of the several vertical tubes are fixedly connected to the inner wall of the heat exchange box, and through grooves are opened on both sides of the horizontal tubes.
[0015] Compared with the prior art, the beneficial effects of the utility model are:
[0016] 1. The dust removal mechanism can filter the dust in the high-temperature flue gas, and the scraper can clean the filter holes of the filter plate to avoid clogging of the filter holes and affecting the filtration of the flue gas, and prevent the dust in the high-temperature flue gas from entering the air preheating area, thereby avoiding affecting the preheating of the air entering from the outside;
[0017] 2. Through the coordination of structures such as partitions, heat exchange tubes, magnetic blocks, baffles, empty slots and through slots, the time for the flue gas and the air entering from the intake duct to pass through the heat exchange area can be extended, ensuring a good preheating effect on the incoming air. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 This is the overall structural view of the utility model;
[0020] Figure 2 It is a schematic diagram of a half-section structure of the exhaust device of the utility model;
[0021] Figure 3 It is a partial half-section structural schematic diagram of the air intake duct of the utility model;
[0022] Figure 4 It is a schematic diagram of the half-section structure of the heat exchange tube of the utility model.
[0023] Description of reference numerals:
[0024] 1. Boiler body; 2. Tail gas device; 3. Exhaust pipe; 4. Burner; 5. Gas pipe; 6. Dust removal mechanism; 7. Heat exchange box; 8. Intake pipe; 9. Guide frame; 10. Slag trough; 11. Rubber plug; 12. Ring; 13. Mounting frame; 14. Fan blade; 15. Partition; 16. Heat exchange tube; 17. Magnetic block; 18. Baffle; 19. Empty slot; 20. Through slot; 61. Filter plate; 62. Rotating ring; 63. Blade; 64. Small rod; 65. Mounting ring; 66. Scraper; 161. Horizontal pipe; 162. Vertical pipe. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] See also Figure 1 to Figure 2The utility model provides a technical solution: a vertical pulverized coal corner tube boiler, comprising a boiler body 1 and a tail gas device 2, the tail gas device 2 is located on the right side of the boiler body 1, an exhaust pipe 3 is plugged between the tail gas device 2 and the boiler body 1, a burner 4 is installed on the left side of the boiler body 1, a heat exchange box 7 is fixedly connected to the inside of the tail gas device 2, an air intake pipe 8 is plugged into the bottom end of the heat exchange box 7, the bottom end of the air intake pipe 8 passes through the side wall of the tail gas device 2, a gas pipe 5 is plugged into the top end of the heat exchange box 7, and the end of the gas pipe 5 away from the heat exchange box 7 is plugged into the burner 4, and a dust removal mechanism 6 is arranged inside the tail gas device 2.
[0027] By adopting the above technical scheme, the boiler body 1 is a pulverized coal angle tube boiler, and its technology is very mature. When in use, the pulverized coal is input into the burner 4, and the preheated air also enters the burner 4 and mixes with the powdered fuel and enters the furnace of the boiler body 1 for violent suspended combustion to heat the water in the boiler, and two-level tertiary wind can be arranged in the furnace to ensure that there is sufficient oxygen in the furnace to react and burn with the fuel. The high-temperature flue gas after combustion enters the exhaust gas device 2, and the heat exchange box 7 in the exhaust gas device 2 preheats the air entering from the intake pipe 8, and the preheated air enters the burner 4 from the gas pipe 5. In this way, the waste heat of the flue gas can be used to preheat the air, thereby achieving the purpose of recycling and energy saving, and the dust removal mechanism 6 can be used to pre-filter the smoke in the high-temperature flue gas to prevent the smoke from entering the area of the heat exchange box 7, thereby preventing the smoke from adhering to the area where the air is preheated, and avoiding the efficiency of air preheating from being affected.
[0028] The dust removal mechanism 6 includes a filter plate 61 fixedly connected to the inner wall of the exhaust device 2, and the filter plate 61 is provided with a plurality of filter holes. The dust removal mechanism 6 also includes a rotating ring 62 rotatably connected to the outside of the intake pipe 8, and a small rod 64 is fixedly connected to the top of the rotating ring 62, and a mounting ring 65 is fixedly connected to the top of the small rod 64. The mounting ring 65 is also rotatably connected to the outside of the intake pipe 8. A scraper 66 is fixedly connected to the outer edge of the mounting ring 65, and a blade 63 is fixedly connected to the outside of the rotating ring 62. The top surface of the scraper 66 fits the bottom surface of the filter plate 61.
[0029] By adopting the above technical solution, when smoke in the exhaust pipe 3 enters the exhaust device 2, it will be filtered by the filter plate 61 to prevent the smoke in the high-temperature smoke from entering the area where the air is preheated, and the installation position of the blade 63 is close to the exhaust pipe 3. When the smoke enters the exhaust device 2, the blade 63 will be blown, so that the blade 63 can rotate with the rotating ring 62, so that the small rod 64 can also rotate, so that the installation ring 65 can rotate with the scraper 66. Since the top surface of the scraper 66 is in contact with the bottom surface of the filter plate 61, the scraper 66 can scrape and clean the dust adhered to the bottom surface of the filter plate 61 when it rotates, so as to prevent the filter holes of the filter plate 61 from being blocked and affecting the filtering of the smoke.
[0030] A guide frame 9 is fixedly connected to the inner wall of the bottom end of the tail gas device 2. The inner side of the guide frame 9 is inclined. A slag discharge groove 10 is opened at the bottom end of the tail gas device 2. A rubber plug 11 is provided at the slag discharge groove 10 of the tail gas device 2.
[0031] By adopting the above technical solution, the inclined design of the guide frame 9 makes it easy for the dust scraped off the filter plate 61 by the scraper 66 to be smoothly concentrated along the incline to the area of the slag discharge trough 10. When in use, the rubber plug 11 is inserted into the slag discharge trough 10 to block the slag discharge trough 10, so that the slag discharge trough 10 is in a sealed state. When the device is not in use, the rubber plug 11 is pulled out by hand to clean the smoke and dust.
[0032] Specifically, Figures 2 to 4 As shown, the inner wall of the air intake duct 8 is rotatably connected with a ring 12, the inner side of the ring 12 is fixedly connected with a mounting bracket 13, the top of the mounting bracket 13 is fixedly connected with a fan blade 14, the centers of the ring 12 and the rotating ring 62 are on the same cross-section, the outer side of the ring 12 and the inner side of the rotating ring 62 are fixedly connected with a magnetic block 17, the magnetic block 17 can be a ferrite magnet, which can operate at a high temperature of 250 degrees Celsius.
[0033] By adopting the above technical solution, the magnetic block 17 on the outer side of the circular ring 12 and the magnetic block 17 on the inner side of the rotating ring 62 are attracted to each other. When the smoke enters the exhaust device 2 and blows the blades 63 to rotate the rotating ring 62, the circular ring 12 will rotate with it under the action of the magnetic force of the magnetic block 17, so that the mounting frame 13 can rotate with the fan blade 14 fixed on its top. When the fan blade 14 rotates, the air in the intake duct 8 can flow from bottom to top, so that the outside air can be sucked into the area of the heat exchange box 7 through the intake duct 8. This can save a certain amount of energy consumed for transporting air, and in actual use, other air transmission equipment can be added to the intake duct 8 to make up for the insufficient amount of air delivered by the rotation of the fan blade 14.
[0034] A partition 15 is fixedly connected to the interior of the exhaust device 2, and the inner side of the partition 15 is fixed to the heat exchange box 7. A heat exchange tube 16 is inserted into the top left side of the partition 15. The material of the heat exchange tube 16 can be copper, which has the characteristic of good thermal conductivity, so that the air preheating effect is good. The end of the heat exchange tube 16 away from the partition 15 penetrates into the interior of the heat exchange box 7. The area where the heat exchange tube 16 penetrates into the interior of the heat exchange box 7 is composed of a plurality of transverse tubes 161 and a plurality of vertical tubes 162. Baffles 18 are fixedly connected between the plurality of transverse tubes 161. An empty groove 19 is opened on the top of the baffle 18. The outer sides of the plurality of vertical tubes 162 are fixedly connected to the inner wall of the heat exchange box 7. Through grooves 20 are opened on both sides of the transverse tube 161, and the through grooves 20 are opened on the transverse tube 161 in an up-and-down staggered manner.
[0035] By adopting the above technical scheme, the outside air enters the heat exchange box 7 through the rotation of the fan blades 14, and the high-temperature flue gas filtered by the filter plate 61 is blocked by the partition 15, and enters the area inside the heat exchange box 7 through the heat exchange tube 16, thereby exchanging heat with the air entering the heat exchange box 7. Since there are several horizontal tubes 161 and several vertical tubes 162 in the internal area of the heat exchange box 7, the distance that the high-temperature flue gas passes through the internal area of the heat exchange box 7 can be longer, thereby extending the heat exchange time, so that the preheating effect of the air entering from the intake duct 8 is good, and after the air entering from the intake duct 8 enters the heat exchange box 7, it will be blocked by the horizontal tube 161 and can only pass through the through groove 20. Since the through grooves 20 are staggered and under the action of the baffle 18 and the empty groove 19, the time required for the air to pass through the heat exchange box 7 can be increased, the time for heat exchange with the high-temperature air can be increased, and the air preheating effect can be further improved.
[0036] Working principle: When in use, coal powder is input into the burner 4, and the preheated air also enters the burner 4 and mixes with the powdered fuel and enters the furnace of the boiler body 1 for violent suspended combustion to heat the water in the boiler. The flue gas after combustion enters the exhaust device 2 from the exhaust pipe 3. The flue gas entering the exhaust device 2 can be filtered through the filter plate 61, and when the flue gas enters the exhaust device 2, the blade 63 will be blown, so that the blade 63 can rotate with the rotating ring 62, so that the small rod 64 can rotate with the mounting ring 65, so that the scraper 66 can rotate to scrape the dust adhered to the bottom surface of the filter plate 61 to avoid clogging of the filter holes of the filter plate 61.
[0037] The filtered high-temperature flue gas is blocked by the partition 15 and enters the area inside the heat exchange box 7 through the heat exchange tube 16, thereby exchanging heat with the air entering the heat exchange box 7. Since the area inside the heat exchange box 7 has several horizontal tubes 161 and several vertical tubes 162, the top horizontal tube 161 penetrates the outer wall of the heat exchange box 7 and the exhaust device 2, which can make the high-temperature flue gas pass through the inner area of the heat exchange box 7. The distance passed by the inner area of the heat exchange box 7 can be longer, which can increase the time for flue gas heat exchange. When the blade 63 rotates with the rotating ring 62, under the action of the magnetic force of the magnetic block 17, the mounting frame 13 rotates with the fan blade 14 fixed at its top, so that the air flows from bottom to top, thereby sucking the outside air into the heat exchange box 7. Due to the obstruction of the horizontal tube 161, the air can only pass through the through groove 20 and the empty groove 19 at the top of the baffle 18, which can extend the time required for the air to pass through the heat exchange box 7, so that the air preheating effect is good.
[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A vertical pulverized coal corner tube boiler, comprising a boiler body (1) and an exhaust device (2), wherein the exhaust device (2) is located on the right side of the boiler body (1), and is characterized in that: An exhaust pipe (3) is inserted between the tail gas device (2) and the boiler body (1); A burner (4) is installed on the left side of the boiler body (1); a heat exchange box (7) is fixedly connected to the interior of the exhaust device (2); an air intake pipe (8) is plugged into the bottom end of the heat exchange box (7); the bottom end of the air intake pipe (8) passes through the side wall of the exhaust device (2); a gas pipe (5) is plugged into the top end of the heat exchange box (7); the end of the gas pipe (5) away from the heat exchange box (7) is plugged into the burner (4); and a dust removal mechanism (6) is provided inside the exhaust device (2).
2. A vertical pulverized coal corner tube boiler according to claim 1, characterized in that: The dust removal mechanism (6) comprises a filter plate (61) fixedly connected to the inner wall of the exhaust device (2), and the dust removal mechanism (6) also comprises a rotating ring (62) rotatably connected to the outer side of the intake pipe (8), a small rod (64) is fixedly connected to the top of the rotating ring (62), a mounting ring (65) is fixedly connected to the top of the small rod (64), and a scraper (66) is fixedly connected to the outer edge of the mounting ring (65).
3. A vertical pulverized coal corner tube boiler according to claim 2, characterized in that: The outer side of the rotating ring (62) is fixedly connected with a blade (63), and the top surface of the scraper (66) is in contact with the bottom surface of the filter plate (61).
4. A vertical pulverized coal corner tube boiler according to claim 1, characterized in that: A guide frame (9) is fixedly connected to the inner wall of the bottom end of the tail gas device (2), the inner side of the guide frame (9) is inclined, a slag discharge groove (10) is provided at the bottom end of the tail gas device (2), and a rubber plug (11) is provided at the slag discharge groove (10) of the tail gas device (2).
5. A vertical pulverized coal corner tube boiler according to claim 2, characterized in that: A circular ring (12) is rotatably connected to the inner wall of the air intake duct (8), a mounting frame (13) is fixedly connected to the inner side of the circular ring (12), a fan blade (14) is fixedly connected to the top of the mounting frame (13), and the centers of the circular ring (12) and the rotating ring (62) are located on the same cross section.
6. A vertical pulverized coal corner tube boiler according to claim 5, characterized in that: The outer side of the circular ring (12) and the inner side of the rotating ring (62) are both fixedly connected with magnetic blocks (17).
7. A vertical pulverized coal corner tube boiler according to claim 1, characterized in that: A partition (15) is fixedly connected to the interior of the exhaust device (2), and the inner side of the partition (15) is fixed to the heat exchange box (7). A heat exchange tube (16) is inserted into the top left side of the partition (15), and the end of the heat exchange tube (16) away from the partition (15) penetrates into the interior of the heat exchange box (7).
8. A vertical pulverized coal corner tube boiler according to claim 7, characterized in that: The area where the heat exchange tube (16) penetrates into the interior of the heat exchange box (7) is composed of a plurality of transverse tubes (161) and a plurality of vertical tubes (162); a baffle (18) is fixedly connected between the plurality of transverse tubes (161); a hollow groove (19) is provided on the top of the baffle (18); the outer sides of the plurality of vertical tubes (162) are fixedly connected to the inner wall of the heat exchange box (7); and through grooves (20) are provided on both sides of the transverse tube (161).