Dust fall device of coal bunker feed port and coal bunker system
By designing a dust cover and buffer chamber at the coal bunker inlet and combining them with dry fog nozzles to treat coal dust, the problem of coal dust backflow during coal bunker feeding was solved, achieving an effective dust reduction effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUODIAN CHENGDU JINTANG POWER GENERATION CO LTD
- Filing Date
- 2025-05-09
- Publication Date
- 2026-04-21
AI Technical Summary
In existing technologies, the design of the coal bunker inlet causes coal dust backflow, resulting in environmental pollution and personnel health problems, and the dust collector's air extraction method is ineffective.
Design a dust suppression device for the coal bunker inlet, including a dust cover, a buffer chamber and a dry mist nozzle. The buffer baffle buffers the coal speed, and the dry mist nozzle sprays water mist to form dust agglomerates, reducing coal dust backflow.
It effectively reduces coal dust backflow during coal bunker feeding, protecting the on-site environment and the health of workers.
Smart Images
Figure CN224147250U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coal transportation technology, and in particular to a dust suppression device for a coal bunker inlet and a coal bunker system. Background Technology
[0002] In China, the feed inlets of coal bunkers are all open designs. When coal is fed, it impacts the bunker and generates coal dust. The backflow of coal dust can easily cause environmental pollution and affect the health of personnel. Currently, dust collectors are commonly used to extract air from the coal bunker. However, a single coal bunker usually has no fewer than four feed inlets. When using dust collectors to extract air from the coal bunker, the space is not enclosed enough to create an effective negative pressure. The required dust collector fan power is also relatively large. The dust collector is often only effective at the closer coal drop inlets, and cannot be effective at the farther coal drop inlets, making it difficult to deal with the problem of coal dust backflow during coal bunker feeding. Utility Model Content
[0003] The purpose of this utility model is to address the problem that the current method of using a dust collector to extract air from the coal bunker is difficult to effectively handle the backflow of coal dust during coal bunker feeding, and to provide a dust suppression device for the coal bunker feed inlet and a coal bunker system.
[0004] In a first aspect, this utility model provides a dust suppression device for the coal bunker inlet, comprising:
[0005] A dust cover has an internal cavity, a first inlet on the left side of the dust cover communicating with the cavity, a first outlet at the bottom of the dust cover communicating with the cavity, a dust curtain at the first inlet, and several dry fog nozzles at the top of the cavity.
[0006] A buffer chamber, the top of which is connected to the bottom of the dust cover, and the first outlet is connected to the interior of the buffer chamber;
[0007] A buffer partition is located below the first outlet. Both ends of the buffer partition are connected to a rotating shaft. The rotating shaft is rotatably mounted on the side wall of the buffer chamber, and one end of the rotating shaft extends to the outside of the buffer chamber and is connected to a counterweight device.
[0008] The buffer plate and the counterweight device maintain torque balance with the rotating shaft as the center.
[0009] Preferably, the counterweight device includes a connecting rod and a counterweight block, the connecting rod is fixedly connected to the end of the rotating shaft, and the counterweight block is detachably mounted on the connecting rod.
[0010] Preferably, the end of the connecting rod away from the rotating shaft is provided with an external thread, the counterweight is provided with a threaded hole in the middle, and the counterweight is threadedly connected to the connecting rod.
[0011] Preferably, the dry fog nozzles are spaced apart along the length of the dust cover.
[0012] Preferably, at least two of the dry fog nozzles are oriented toward the first outlet.
[0013] Preferably, the top surface of the buffer partition is provided with a rubber layer.
[0014] Preferably, the dust cover is also provided with an observation window on the top.
[0015] Preferably, the buffer chamber has a downwardly inclined baffle, which is located between the first outlet and the buffer partition, and the baffle is connected to the inner wall of the buffer chamber on the side away from the first inlet.
[0016] Preferably, the angle between the baffle and the inner wall of the buffer chamber is 30° to 45°.
[0017] In a second aspect, the present invention provides a coal bunker system, including a coal bunker, an inlet disposed on the top of the coal bunker, and a dust suppression device as described in this application, wherein the buffer chamber is detachably connected to the top of the inlet and is in communication with the inlet.
[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0019] 1. In use, the dust suppression device described in this application first installs a buffer bin at the coal bunker's inlet, then installs a dust cover on the buffer bin. The conveyor belt of the coal conveyor is located at the first inlet of the dust cover. The coal enters the dust cover through the dust curtain and then enters the buffer bin through the first outlet. When the coal enters the buffer bin, it impacts the buffer baffle, disrupting the balance between the buffer baffle and the counterweight device. The buffer baffle rotates downwards, causing the coal to fall into the coal bunker. The buffer baffle buffers the speed of the coal entering the coal bunker, thereby reducing the impact of the coal on the coal bunker. This reduces the height of coal dust backflow. When the coal dust backflows into the dust cover, it is blocked when it impacts the dust curtain. The dry mist nozzle sprays water mist during operation, and the coal dust particles and water mist particles come into full contact to form dust clumps, which settle under gravity. This reduces the amount of coal dust overflowing from the first inlet of the dust cover. The dust suppression device in this embodiment confines the coal dust backflowing from the feed inlet to the inside of the dust cover and buffer chamber, and then uses water mist dust removal to suppress the dust, which greatly reduces the backflow of coal dust when feeding into the coal bunker and effectively protects the on-site environment and the health of the workers.
[0020] 2. The coal bunker system described in this application reduces the backflow of coal dust during coal bunker feeding by installing a dust suppression device at the coal bunker inlet, thereby protecting the on-site environment and the health of the workers. Attached Figure Description
[0021] Figure 1 This is a side view of the dust suppression device of this application.
[0022] Figure 2 yes Figure 1 Sectional view at point AA.
[0023] Figure 3 yes Figure 2 A magnified view of section B.
[0024] Figure 4 This is a top view of the dust cover.
[0025] Figure 5 yes Figure 1 The front view.
[0026] Figure 6 yes Figure 1 Rear view.
[0027] Figure 7 This is a side view of a preferred method of dust suppression device.
[0028] Figure 8 yes Figure 7 The front view.
[0029] Figure 9 This is a schematic diagram of the coal bunker system.
[0030] Marked in the image:
[0031] 1-Dust cover, 11-Containing cavity, 12-First inlet, 13-First outlet, 14-Observation window, 2-Dust curtain, 3-Dry fog nozzle, 4-Buffer chamber, 5-Rotating shaft, 6-Buffer partition, 7-Counterweight, 8-Connecting rod, 9-Baffle, 10-Coal bunker, 20-Feed inlet. Detailed Implementation
[0032] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.
[0033] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.
[0034] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.
[0035] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.
[0036] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.
[0037] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.
[0038] Example 1
[0039] like Figures 1-6 As shown, this embodiment discloses a dust suppression device for a coal bunker inlet, including a dust cover 1, a dust curtain 2, a dry mist nozzle 3, a buffer chamber 4, a rotating shaft 5, and a buffer partition 6. The dust cover 1 has an internal accommodating cavity 11, a first inlet 12 communicating with the accommodating cavity 11 on the left side of the dust cover 1, and a first outlet 13 communicating with the accommodating cavity 11 at the bottom of the dust cover 1. A dust curtain 2 is provided at the first inlet 12, and several dry mist nozzles 3 are provided at the top of the accommodating cavity 11.
[0040] The buffer chamber 4 is connected to the bottom of the dust cover 1, and the first outlet 13 is connected to the inside of the buffer chamber 4.
[0041] The buffer baffle 6 is located below the first outlet 13. Both ends of the buffer baffle 6 are connected to the rotating shaft 5. The rotating shaft 5 is rotatably mounted on the side wall of the buffer chamber 4, and one end of the rotating shaft 5 extends to the outside of the buffer chamber 4 and is connected to a counterweight device.
[0042] The buffer plate 6 and the counterweight device maintain torque balance with the rotating shaft 5 as the center.
[0043] In this embodiment, the dust suppression device has a dust cover 1 and a buffer chamber 4 arranged vertically, with the dust cover 1 located above the buffer chamber 4. The top of the buffer chamber 4 is connected to the bottom of the dust cover 1. The dust cover 1 has a receiving cavity 11 inside, a first inlet 12 on the left side of the dust cover 1 communicating with the receiving cavity 11, and a first outlet 13 at the bottom of the dust cover 1 communicating with the receiving cavity 11. A dust curtain 2 is provided at the first inlet 12. Several dry mist nozzles 3 are provided at the top of the receiving cavity 11. The first outlet 13 is connected to the buffer chamber 4. In use, the buffer chamber 4 is first installed on the feed inlet 20 of the coal bunker 10, and then the dust cover 1 is installed on the buffer chamber 4. The conveyor belt of the coal conveyor is located at the first inlet 12 of the dust cover 1. The coal enters the interior of the dust cover 1 through the dust curtain 2 and then enters the buffer chamber 4 through the first outlet 13. At 4 o'clock, the coal impacts the buffer baffle 6, disrupting the balance between the buffer baffle 6 and the counterweight device. The buffer baffle 6 rotates downwards, causing the coal to fall into the coal bunker 10. The buffer baffle 6 buffers the speed of the coal entering the coal bunker 10, reducing the impact of the coal on the coal bunker 10 and thus reducing the height of the coal dust backflow. When the coal dust backflows into the dust cover 1, it is blocked when it impacts the dust curtain 2. The dry mist nozzle 1 sprays water mist during operation, and the coal dust particles and water mist particles come into full contact to form dust clumps, which settle under gravity, thereby reducing the amount of coal dust overflowing from the first inlet 12 of the dust cover 1. The dust suppression device in this embodiment confines the coal dust backflowing from the feed inlet 20 within the dust cover 1 and the buffer chamber 4, and then uses water mist dust removal to suppress the dust, greatly reducing the coal dust backflow when the coal bunker 10 is fed, effectively protecting the on-site environment and the health of the workers.
[0044] In this application, when no coal is being fed into the coal bunker 10, the buffer baffle 6 and the counterweight device maintain torque balance around the rotating shaft 5, and the buffer baffle 6 is in a horizontal or nearly horizontal state at this time.
[0045] When coal is being conveyed into the coal bunker 10, the coal impacts the buffer baffle 6, disrupting the balance between the buffer baffle 6 and the counterweight device. The buffer baffle 6 rotates downwards, causing the coal to fall into the coal bunker 10. The buffer baffle 6 buffers the speed of the coal entering the coal bunker 10, thereby reducing the impact of the coal on the coal bunker 10 and lowering the height of the coal dust backflow. After the coal conveying is completed, the buffer baffle 6 returns to a horizontal or near-horizontal state under the action of the counterweight device to block the coal dust backflow and reduce the overflow of the coal dust backflow.
[0046] In this application, the fact that the buffer plate 6 and the counterweight device maintain torque balance around the rotating shaft 5 means that the buffer plate 6 and the counterweight device are in a state of torque balance around the rotating shaft 5.
[0047] Specifically, torque is the product of force and lever arm. For the buffer plate 6, it is affected by its own weight, and with the pivot 5 as the fulcrum, it will generate a torque that causes it to rotate around the pivot 5. Similarly, the counterweight device will also generate a torque due to its own weight, with the pivot 5 as the fulcrum. When the buffer plate 6 and the counterweight device maintain torque balance with the pivot 5 as the center, it means that the two torques are equal in magnitude and opposite in direction, so that the whole formed by the buffer plate 6 and the counterweight device will not rotate around the pivot 5, and the buffer plate 6 and the counterweight device are in a relatively stable state.
[0048] In this application, as Figure 1 , Figure 2 As shown, the two rotating shafts 5 are located on the same axis, and the rotating shafts 5 are located in the area near the first inlet 12 at the end of the buffer baffle 6. The rotating shafts 5 divide the buffer baffle 6 into two areas, left and right. The left area is smaller than the right area. After the coal passes through the dust cover 1, it impacts the right area of the buffer baffle 6, causing the buffer baffle 6 to rotate downwards, thus facilitating the coal to pass through the buffer baffle 6 into the coal bunker 10.
[0049] In an optional embodiment, a rubber layer is bonded to the top surface of the buffer partition 6 to buffer the impact when the coal comes into contact with the buffer partition 6.
[0050] In this application, the buffer baffle 6 is used to divide the buffer chamber 4 into upper and lower parts. When there is no coal impacting the buffer baffle 6, the buffer baffle 6 is in a horizontal or nearly horizontal state. At this time, the buffer baffle 6 divides the buffer chamber 4 into upper and lower parts, thereby blocking the coal dust in the lower part of the buffer chamber 4.
[0051] When coal impacts the buffer baffle 6, the buffer baffle 6 flips downward, allowing the coal to pass through the buffer chamber 4 and enter the feed inlet 20.
[0052] In optional implementations, such as Figure 2 , Figure 3 As shown, two rotating shafts 5 connect the two ends of the buffer baffle 6, so that the buffer baffle 6 and the rotating shafts 5 are connected as one unit. Then, the rotating shafts 5 are rotatably installed on the side wall of the buffer chamber 4. When the buffer baffle 6 is impacted by coal, the buffer baffle 6 rotates through the rotating shafts 5.
[0053] Specifically, the rotating shaft 5 is a round steel rod, and the buffer plate 6 is a steel plate, which are connected by welding.
[0054] Furthermore, a bearing is installed on the side wall of the buffer chamber 4, and the end of the rotating shaft 5 passes through the bearing and extends outside the side wall of the buffer chamber 4. The rotating shaft 5 rotates through the cooperation of the bearing and the rotating shaft 5.
[0055] In one or more implementations, such as Figure 2 As shown, the counterweight device includes a connecting rod 8 and a counterweight block 7. The connecting rod 8 is fixedly connected to the end of the rotating shaft 5, and the counterweight block 7 is detachably installed on the connecting rod 8.
[0056] Specifically, one end of the connecting rod 8 is fixedly connected to the end of the rotating shaft 5. The connecting rod 8 and the rotating shaft 5 can be made of steel rods and are connected by welding.
[0057] The other end of the connecting rod 8 is detachably fitted with a counterweight 7 for easy replacement of the counterweight 7.
[0058] In this embodiment, each end of the rotating shaft 5 is connected to a set of counterweights.
[0059] In an optional embodiment, the end of the connecting rod 8 away from the rotating shaft 5 is provided with a thread, and the counterweight 7 is provided with a threaded hole in the middle, and the counterweight 7 is threadedly connected to the connecting rod 8.
[0060] The counterweight 7 and the connecting rod 8 are connected by threads, which makes it easy to install, remove and replace the counterweight 7.
[0061] Furthermore, it also facilitates adjusting the balance of the buffer plate 6 by replacing the counterweights 7 with different weights, so as to ensure that the counterweight device and the buffer plate 6 can maintain torque balance with the rotating shaft 5 as the center.
[0062] In one or more implementations, such as Figures 4-6 As shown, the dry fog nozzles 3 are spaced apart along the length of the dust cover 1. By setting multiple dry fog nozzles 3 on the top of the dust cover 1, the dust suppression effect is further increased.
[0063] In optional implementations, such as Figure 1As shown, at least two dry fog nozzles 3 are oriented toward the first outlet 13.
[0064] At least two dry fog nozzles 3 are used to quickly treat the coal dust that flows back to the first outlet 13.
[0065] In one or more implementations, such as Figure 1 As shown, the dust cover 1 also has an observation window 14 on its top.
[0066] In one or more embodiments, a first flange plate is provided at the bottom of the dust cover;
[0067] The top of the buffer chamber 4 is equipped with a second flange plate, and the first flange plate is bolted to the second flange plate.
[0068] The dust cover and the buffer chamber are detachably connected by bolts to the first flange plate and the second flange plate.
[0069] Furthermore, a third flange plate is provided at the bottom of the buffer chamber 4, which is used for bolt connection with the feed inlet.
[0070] The buffer chamber 4 is detachably connected to the feed inlet 20 in the manner described above.
[0071] Example 2
[0072] Based on Example 1, such as Figure 7 , Figure 8 As shown, the buffer chamber 4 is provided with a downwardly inclined baffle 9. The baffle 9 is located between the first outlet 13 and the buffer partition 6, and the baffle 9 is connected to the inner wall of the buffer chamber 4 on the side away from the first inlet 12.
[0073] The baffle 9 is connected to the inner wall of the buffer chamber 4 on the side away from the first inlet 12. When the coal comes out of the first inlet 12, some of the splashed coal hits the baffle 9 to reduce the impact of the coal on the buffer partition 6.
[0074] Furthermore, when some coal dust flows back to the baffle 9, because the baffle 9 is set to be inclined downward, the baffle 9 changes the airflow direction of the coal dust, causing the coal dust to move obliquely downward. During the oblique downward movement, some of the coal dust falls downward under the action of gravity, effectively reducing the backflow of coal dust.
[0075] In an optional embodiment, the angle between the baffle 9 and the inner wall of the buffer chamber 4 is 30° to 45°, so that the baffle 9 has a better dust reduction effect.
[0076] In an optional embodiment, a rubber layer is bonded to the top surface of the baffle 9 to buffer the impact force when the coal comes into contact with the baffle 9.
[0077] Among them, the baffle 9 is made of steel plate, and the buffer chamber 4 is a shell made of steel plate or iron plate. The baffle 9 is welded to the inner wall of the buffer chamber 4.
[0078] Example 3
[0079] like Figure 9 As shown, based on Embodiment 1 or Embodiment 2, this embodiment also discloses a coal bunker system, including a coal bunker 10, a feed inlet 20 disposed on the top of the coal bunker 10, and a dust suppression device as described in Embodiment 1 or Embodiment 2. A buffer chamber 4 is detachably connected to the top of the feed inlet 20, and the buffer chamber 4 is connected to the feed inlet 20.
[0080] By installing a dust suppression device at the feed inlet 20 of the coal bunker 10, the backflow of coal dust during coal bunker feeding is reduced, thereby protecting the on-site environment and the health of the workers.
[0081] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A dust faller for a coal bunker inlet, characterized in that, include: A dust cover (1) has an internal cavity (11), a first inlet (12) on the left side of the dust cover (1) communicating with the cavity (11), a first outlet (13) at the bottom of the dust cover (1) communicating with the cavity (11), a dust curtain (2) at the first inlet (12), and a plurality of dry fog nozzles (3) at the top of the cavity (11). A buffer chamber (4) is provided, the top of which is connected to the bottom of the dust cover (1), and the first outlet (13) is connected to the interior of the buffer chamber (4). A buffer partition (6) is located below the first outlet (13). Both ends of the buffer partition (6) are connected to a rotating shaft (5). The rotating shaft (5) is rotatably mounted on the side wall of the buffer chamber (4), and one end of the rotating shaft (5) extends to the outside of the buffer chamber (4) and is connected to a counterweight device. The buffer plate (6) and the counterweight device maintain torque balance with the rotating shaft (5) as the center.
2. A dust suppression device for a coal bin inlet as claimed in claim 1, wherein, The counterweight device includes a connecting rod (8) and a counterweight block (7). The connecting rod (8) is fixedly connected to the end of the rotating shaft (5), and the counterweight block (7) is detachably installed on the connecting rod (8).
3. A dust suppression device for a coal bin inlet as defined in claim 2, wherein, The connecting rod (8) has an external thread at one end away from the rotating shaft (5), and the counterweight (7) has a threaded hole in the middle. The counterweight (7) is threadedly connected to the connecting rod (8).
4. A dust suppression device for a coal bin inlet as defined in claim 1, wherein, The dry fog nozzles (3) are spaced apart along the length of the dust cover (1).
5. A dust suppression device for a coal bin inlet as defined in claim 4, wherein, At least two of the dry fog nozzles (3) are directed toward the first outlet (13).
6. A dust suppression device for a coal bin inlet as defined in claim 1, wherein, The top surface of the buffer partition (6) is provided with a rubber layer.
7. A dust suppression device for a coal bin inlet as defined in claim 1, wherein, The dust cover (1) is also provided with an observation window (14) on the top.
8. A dust suppression device for a coal bin inlet according to any one of claims 1 to 7, wherein, The buffer chamber (4) has a downwardly inclined baffle (9) located between the first outlet (13) and the buffer partition (6), and the baffle (9) is connected to the inner wall of the buffer chamber (4) on the side away from the first inlet (12).
9. A dust suppression device for a coal bin inlet as defined in claim 8, wherein, The angle between the baffle (9) and the inner wall of the buffer chamber (4) is 30° to 45°.
10. A coal bunker system characterized by, Includes a coal bunker (10), a feed inlet (20) disposed on the top of the coal bunker (10), and a dust suppression device as described in any one of claims 1-9, wherein the buffer chamber (4) is detachably connected to the top of the feed inlet (20), and the buffer chamber (4) is in communication with the feed inlet (20).