Coal mill hot air pipe dust collection device

Abstract

This utility model discloses a dust collection device for a coal mill hot air duct, including a top cover and a dust filter. The top cover is cylindrical, with one end open and the other end closed. An exhaust pipe is located at the closed end of the top cover, and the exhaust pipe and the top cover are concentrically arranged. The interior of the exhaust pipe communicates with the interior of the top cover and with the outside. Several through holes are provided at the closed end of the top cover, all located on the outer side of the exhaust pipe and arranged circumferentially. A vortex tube is provided on one side of the top cover, and a connecting pipe is provided at the end of the vortex tube, communicating with the interior of the top cover. The dust filter includes a conical filter screen and several threaded sleeves. The bottom end of the conical filter screen is open, and an annular plate is provided at the bottom edge of the conical filter screen to remove fly ash from the grate cooler, reduce coal depletion, and improve the calorific value of the coal.

Description

Technical Field

[0001] This utility model relates to the field of coal mill technology, specifically to a dust collection device for hot air ducts in coal mills. Background Technology

[0002] In industrial sectors such as cement production, hot air ducts in coal mills play a crucial role. Coal mill systems require a stable heat source to dry pulverized coal, ensuring smooth production. Hot air ducts are typically connected to equipment such as grate coolers, introducing high-temperature hot air into the coal mill.

[0003] With the continuous development of industrial technology, the performance requirements for coal mill hot air ducts are becoming increasingly stringent. In traditional processes, hot air ducts are responsible for transmitting high-temperature gas to provide the necessary heat for drying pulverized coal. However, due to factors such as the design and operating conditions of the hot air ducts, some problems often arise during actual use.

[0004] Existing coal mill hot air ducts are prone to carrying fly ash from the grate cooler during operation. This fly ash, once inside the ducts, enters the coal mill system along with the hot air, leading to severe coal depletion. Increased impurities in the coal result in greater deviations in its calorific value, consequently affecting the subsequent combustion process and product quality, causing numerous adverse effects on industrial production. Utility Model Content

[0005] Based on the aforementioned problems in the existing technology, the purpose of this utility model embodiment is to provide a coal mill hot air duct dust collection device to remove fly ash from the grate cooler, reduce coal depletion, and reduce the deviation in coal calorific value.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a dust collection device for hot air pipes of a coal mill, including a top cover and a dust filter device;

[0007] The top cover is cylindrical, with one end open and the other end closed. The closed end of the top cover is provided with an exhaust pipe, which is concentrically arranged with the top cover. The interior of the exhaust pipe is connected to the interior of the top cover and is also connected to the outside. The closed end of the top cover has several through holes, which are all located on the outside of the exhaust pipe and are arranged along the circumference of the exhaust pipe. A vortex tube is provided on one side of the top cover, and a connecting pipe is provided at the end of the vortex tube. The interior of the vortex tube is connected to the interior of the top cover.

[0008] The dust filtration device includes a conical filter screen and several threaded sleeves. The bottom end of the conical filter screen is open, and an annular plate is provided at the bottom edge of the conical filter screen. Several threaded rods are provided on the end face of the annular plate away from the conical filter screen, and the threaded rods are arranged circumferentially along the annular plate.

[0009] The conical filter screen is disposed inside the top cover with the threaded rod passing through the through hole one, and the thread is sleeved outside the closed end of the top cover and threadedly engaged with the threaded rod.

[0010] Furthermore, the outer wall of the threaded sleeve is provided with several vertical grooves.

[0011] Furthermore, the top cover is provided with a number of reinforcing ribs at the closed end, and the reinforcing ribs are equidistantly arranged along the circumference of the top cover.

[0012] Furthermore, it includes a conical cylinder, both ends of which are open, and an annular boss is provided at the bottom edge of the conical cylinder. Several through holes are provided on the annular boss, and the several through holes are equidistantly arranged along the circumference of the annular boss. Bolts and nuts are provided in the through holes.

[0013] The top cover opening is provided with an annular protrusion II, and the annular protrusion II is provided with a plurality of through holes III, which are equidistantly arranged along the circumference of the annular protrusion II.

[0014] The conical cylinder is fitted with the top cover in such a way that the first annular boss fits into the second annular boss, and the third through hole and the second through hole correspond to each other, through which the bolt passes and engages with the nut threadedly.

[0015] Furthermore, an annular groove is provided on the surface where the first annular boss and the second annular boss fit together, and a sealing ring is provided on the second annular boss at a position corresponding to the annular groove, the sealing ring being embedded in the annular groove.

[0016] Furthermore, the end of the conical cylinder away from the annular boss is provided with a connecting pipe.

[0017] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0018] 1. The dust collection device is installed by connecting the exhaust pipe and the coal mill hot air pipe. Before supplying hot air, the hot air passes through the dust collection device for dust removal and then enters the coal mill hot air pipe. During this process, the hot air enters the top cover from the connecting pipe and rotates against the inner wall of the top cover. Due to gravity and the influence of the conical cylinder, it moves in a spiral downward motion. After finally touching the bottom, it rises and is discharged into the coal mill hot air pipe from the exhaust pipe. During the spiral downward process of the hot air, the dust contained in it falls into the bottom of the conical cylinder, causing the fly ash from the grate cooler carried in the hot air to fall off, making the hot air pure. When it enters the coal mill, it reduces the phenomenon of coal depletion and reduces the deviation of coal calorific value.

[0019] 2. The added conical filter screen can effectively prevent the residual fly ash from the grate cooler when the hot air reaches the bottom and rises. It intercepts the residual fly ash at the conical filter screen, further purifying the purity of the hot air. When the conical filter screen is severely clogged, the conical cylinder can be removed, and then the threaded sleeve can be removed, making it easy to remove the conical filter screen for cleaning and maintenance. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] In the picture:

[0022] Figure 1 This is a three-dimensional schematic diagram of the coal mill hot air duct dust collection device in this utility model;

[0023] Figure 2 This is an exploded schematic diagram of the coal mill hot air duct dust collection device in this utility model;

[0024] Figure 3 yes Figure 1 A three-dimensional schematic diagram of the top cover;

[0025] Figure 4 yes Figure 1 A bottom view of the top cover;

[0026] Figure 5 yes Figure 2 An explosion diagram of the dust filtration device in the image;

[0027] Figure 6 yes Figure 1 A three-dimensional schematic diagram of the conical cylinder in the diagram;

[0028] In the picture:

[0029] 1. Top cover;

[0030] 10. Through hole one; 11. Annular boss two; 12. Exhaust pipe; 13. Reinforcing rib; 14. Vortex tube;

[0031] 110. Through hole three; 111. Sealing ring;

[0032] 141. Take over the first unit;

[0033] 2. Dust filtration device;

[0034] 21. Conical filter screen; 22. Threaded sleeve;

[0035] 211. Annular plate; 212. Threaded rod;

[0036] 220. Vertical groove;

[0037] 3. Conical cylinder;

[0038] 31. Annular boss one; 32. Bolt; 33. Nut; 34. Connecting pipe two;

[0039] 3101, Through hole two; 3102, Annular groove. Detailed Implementation

[0040] The present invention will now be described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0041] Please see Figure 1-6 The present invention provides a technical solution: a dust collection device for hot air ducts of a coal mill, comprising a top cover 1, a dust filter 2, and a conical cylinder 3.

[0042] The top cover 1 is cylindrical, with one end of the top cover 1 being an open end and the other end being a closed end.

[0043] An annular boss 2 11 is provided at the edge of the opening end of the top cover 1. Several through holes 3 110 are provided on the annular boss 2 11. The several through holes 3 110 are equidistantly arranged along the circumference of the annular boss 2 11.

[0044] The top cover 1 is provided with an exhaust pipe 12 at its closed end. The exhaust pipe 12 and the top cover 1 are arranged concentrically. The interior of the exhaust pipe 12 is connected to the interior of the top cover 1 and is also connected to the outside. The top cover 1 is provided with several through holes 10 at its closed end. All the through holes 10 are located on the outside of the exhaust pipe 12 and are arranged along the circumference of the exhaust pipe 12.

[0045] The top cover 1 has several reinforcing ribs 13 on its closed end, and the reinforcing ribs 13 are equidistantly arranged along the circumference of the top cover 1.

[0046] A vortex tube 14 is provided on one side of the top cover 1, and a connecting pipe 141 is provided at the end of the vortex tube 14. The interior of the vortex tube 14 is connected to the interior of the top cover 1.

[0047] The dust filtration device 2 includes a conical filter screen 21 and several threaded sleeves 22.

[0048] The bottom end of the conical filter screen 21 is open, and the bottom edge of the conical filter screen 21 is provided with an annular plate 211. Several threaded rods 212 are provided on the end face of the annular plate 211 away from the conical filter screen 21. The threaded rods 212 are arranged circumferentially along the annular plate 211. The conical filter screen 21 is provided in the top cover 1 by the threaded rods 212 passing through the through hole 10. The threaded sleeve 22 is provided outside the closed end of the top cover 1 and is threadedly engaged with the threaded rods 212. Several vertical grooves 220 are provided on the outer wall of the threaded sleeve 22.

[0049] Both ends of the conical cylinder 3 are open, and an annular boss 31 is provided at the bottom edge of the conical cylinder 3. Several through holes 3101 are provided on the annular boss 31. The several through holes 3101 are equidistantly arranged along the circumference of the annular boss 31. Bolts 32 and nuts 33 are provided in the through holes 3101. The conical cylinder 3 is fitted with the top cover 1 in such a way that the annular boss 31 fits against the annular boss 31. The through holes 310 and 3101 correspond to each other. The bolts 32 pass through them and are threadedly engaged with the nuts 33. The end of the conical cylinder 3 away from the annular boss 31 is provided with a connecting pipe 34.

[0050] An annular groove 3102 is provided on the surface where the annular boss 11 and the annular boss 21 fit together. A sealing ring 111 is provided at the position corresponding to the annular boss 211 and the annular groove 3102, and the sealing ring 111 is embedded in the annular groove 3102.

[0051] The dust collection device is installed by connecting the exhaust pipe 12 and the coal mill hot air pipe. Before supplying hot air, the hot air passes through the dust collection device for dust removal and then enters the coal mill hot air pipe. During this process, the hot air enters the top cover 1 from the connecting pipe 141 and rotates against the inner wall of the top cover 1. Due to gravity and the influence of the conical cylinder 3, it moves in a spiral downward motion. After finally touching the bottom, it rises and is discharged into the coal mill hot air pipe from the exhaust pipe 12. During the spiral downward process of the hot air, the dust contained in it falls into the bottom of the conical cylinder 3, causing the fly ash from the grate cooler carried in the hot air to fall off, making the hot air pure. When it enters the coal mill, it reduces the phenomenon of coal depletion and reduces the deviation of coal calorific value.

[0052] The added conical filter 21 can effectively prevent the residual fly ash from the grate cooler when the hot air reaches the bottom and rises. It intercepts the residual fly ash at the conical filter 21, further purifying the purity of the hot air. When the conical filter 21 is severely clogged, the conical cylinder 3 can be removed, and then the threaded sleeve 22 can be removed, making it easy to remove the conical filter 21 for cleaning and maintenance.

[0053] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A dust collection device for hot air ducts in a coal mill, characterized in that: Includes a top cover and a dust filter; The top cover is cylindrical, with one end open and the other end closed. The closed end of the top cover is provided with an exhaust pipe, which is concentrically arranged with the top cover. The interior of the exhaust pipe is connected to the interior of the top cover and is also connected to the outside. The closed end of the top cover has several through holes, which are all located on the outside of the exhaust pipe and are arranged along the circumference of the exhaust pipe. A vortex tube is provided on one side of the top cover, and a connecting pipe is provided at the end of the vortex tube. The interior of the vortex tube is connected to the interior of the top cover. The dust filtration device includes a conical filter screen and several threaded sleeves. The bottom end of the conical filter screen is open, and an annular plate is provided at the bottom edge of the conical filter screen. Several threaded rods are provided on the end face of the annular plate away from the conical filter screen, and the threaded rods are arranged circumferentially along the annular plate. The conical filter screen is disposed inside the top cover with the threaded rod passing through the through hole one, and the thread is sleeved outside the closed end of the top cover and threadedly engaged with the threaded rod.

2. The dust collection device for hot air ducts of a coal mill according to claim 1, characterized in that: The outer wall of the threaded sleeve is provided with several vertical grooves.

3. The dust collection device for hot air ducts of a coal mill according to claim 1, characterized in that: The top cover is provided with a number of reinforcing ribs at the closed end, and the reinforcing ribs are equidistantly arranged along the circumference of the top cover.

4. The dust collection device for hot air ducts of a coal mill according to claim 1, characterized in that: The device includes a conical cylinder, both ends of which are open, and an annular boss is provided at the bottom edge of the conical cylinder. Several through holes are provided on the annular boss, and the several through holes are equidistantly arranged along the circumference of the annular boss. Bolts and nuts are provided in the through holes. The top cover opening is provided with an annular protrusion II, and the annular protrusion II is provided with a plurality of through holes III, which are equidistantly arranged along the circumference of the annular protrusion II. The conical cylinder is fitted with the top cover in such a way that the first annular boss fits into the second annular boss, and the third through hole and the second through hole correspond to each other, through which the bolt passes and engages with the nut threadedly.

5. A coal mill hot air duct dust collection device according to claim 4, characterized in that: The annular boss one and the annular boss two have annular grooves on their mating surfaces. A sealing ring is provided on the annular boss two at a position corresponding to the annular groove, and the sealing ring is embedded in the annular groove.

6. A coal mill hot air duct dust collection device according to claim 4, characterized in that: The conical cylinder is provided with a connecting pipe two at the end away from the annular boss one.

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