Intermediate frequency furnace smoke treatment device

Abstract

The utility model provides a smoke treatment device for an intermediate frequency furnace, and relates to the technical field of electrolytic aluminum prebaked anode production. The intermediate frequency furnace smoke dust treatment device comprises a furnace body, a smoke dust collecting structure, a dust removing structure and a telescopic pipe. The smoke dust collecting structure is fixed relative to the furnace body and is arranged at a furnace mouth of the furnace body; one end of the telescopic pipe is rotationally connected and communicated with the dust removal structure, and the other end of the telescopic pipe is rotationally connected and communicated with the smoke dust collecting structure; wherein the rotating axis of the telescopic pipe relative to the smoke dust collecting structure, the rotating axis of the telescopic pipe relative to the dust removing structure and the overturning axis of the furnace body are parallel to one another. The flue dust treatment device for the intermediate frequency furnace can always effectively collect flue dust at the furnace mouth at the three stages of feeding, smelting and molten iron discharging of the crown block suction cup, and the flue dust collection rate is high.

Description

Technical Field

[0001] This utility model relates to the field of electrolytic aluminum prebaked anode production technology, and more specifically, to a medium-frequency furnace dust treatment device. Background Technology

[0002] In the prebaked anode assembly process of modern aluminum electrolysis plants, the smelting of pig iron in medium-frequency furnaces generates a large amount of smoke and dust, mainly composed of small particles such as iron oxide, silicon oxide, and manganese oxide, as well as unburned CO and SO2 gases. Direct emission of this smoke and dust would severely pollute the working environment, endangering the health of employees. Furthermore, once the smoke and dust rises to the overhead crane position, it can obstruct the operator's view, posing a significant safety hazard. Therefore, it is necessary to collect and treat the smoke and dust from the medium-frequency furnaces.

[0003] Currently, the dust collection rate of flue gas treatment systems for intermediate frequency furnaces is low, typically only ensuring the collection of about 75% of the dust. This is because dust generation in intermediate frequency furnaces occurs in three stages: overhead crane suction cup charging, smelting, and tapping molten iron. The flow direction of the dust is not entirely consistent across these three stages. Specifically, during the stage where molten iron is poured from the furnace nozzle, the furnace body gradually rotates, causing the furnace opening's orientation to constantly change, thus altering the dust flow direction. Existing dust treatment systems struggle to adapt to these changes, resulting in a low dust collection rate. Utility Model Content

[0004] The present invention aims to improve the capture rate of flue gas from medium-frequency furnaces.

[0005] To address the aforementioned problems, this utility model provides a medium-frequency furnace dust treatment device, comprising a furnace body, a dust collection structure, a dust removal structure, and a telescopic pipe; the dust collection structure is fixed relative to the furnace body and is disposed at the furnace opening of the furnace body; one end of the telescopic pipe is rotatably connected and communicates with the dust removal structure, and the other end of the telescopic pipe is rotatably connected and communicates with the dust collection structure; wherein, the axis of rotation of the telescopic pipe relative to the dust collection structure, the axis of rotation of the telescopic pipe relative to the dust removal structure, and the axis of rotation of the furnace body are parallel.

[0006] Furthermore, the dust removal structure includes a dust collection pipe and a dust collection box; one end of the dust collection pipe is connected to the dust collection box, and the other end of the dust collection pipe is rotatably connected to and connected to the end of the telescopic pipe away from the dust collection structure.

[0007] Furthermore, it also includes a tilting platform, on which the furnace body and the dust collection structure are respectively disposed, and the furnace body and the dust collection structure are used to tilt as the tilting platform tilts.

[0008] Furthermore, it also includes a support structure, through which the flue is fixed to the wall.

[0009] Furthermore, the dust collection structure includes an annular tube surrounding the furnace opening, and the inner wall of the annular tube is provided with collection holes.

[0010] Furthermore, multiple collection holes are provided, and the multiple collection holes are distributed along the circumferential and / or axial direction of the annular tube on the inner sidewall of the annular tube.

[0011] Furthermore, the dust collection structure also includes a transition tube assembly; one end of the transition tube assembly is connected to the outer wall of the annular tube, and the other end of the transition tube assembly is rotatably connected to and communicates with the end of the telescopic tube away from the dust collection structure.

[0012] Furthermore, the axis of the furnace body's rotation is located on one side of the furnace body, and the transition pipe assembly is located on the side of the annular pipe away from the rotation axis of the furnace body.

[0013] Furthermore, the transition pipe assembly includes a first transition pipe and a second transition pipe connected to each other; the first transition pipe communicates with the annular pipe, and the extension direction of the first transition pipe is parallel to the radial direction of the annular pipe; the second transition pipe includes a bent pipe portion and a straight pipe portion connected to each other, the end of the bent pipe portion away from the straight pipe portion is connected to the first transition pipe, and the end of the straight pipe portion away from the bent pipe portion is connected to the telescopic pipe.

[0014] Furthermore, in the direction in which the first transition tube gradually moves away from the annular tube, the diameter of the first transition tube decreases; and / or, the bending shape of the bent section is a quarter-circle arc.

[0015] The present invention provides a medium-frequency furnace dust treatment device, which, compared with the prior art, has, but is not limited to, the following technical effects:

[0016] In this medium-frequency furnace dust treatment device, the dust collection structure is relatively fixed at the furnace opening, allowing it to rotate with the furnace body, ensuring its relative position to the furnace opening remains constant. Thus, even during the process of pouring molten iron from the furnace, the dust collection structure, fixed to the furnace body, effectively collects dust at the furnace opening, achieving a high dust collection rate. In addition to the dust collection structure, the device also includes a telescopic pipe and a dust removal structure connected in sequence to the dust collection structure. The dust collected by the dust collection structure enters the dust removal structure through the telescopic pipe, where it is purified before being discharged, ultimately preventing environmental pollution, protecting the health of workers, and ensuring unobstructed visibility, thus guaranteeing the normal operation of the prebaked anode assembly process. In this medium-frequency furnace dust treatment device, one end of the telescopic pipe is rotatably connected to and communicates with the dust removal structure, and the other end of the telescopic pipe is rotatably connected to and communicates with the dust collection structure. Thus, when the furnace body carrying the dust collection device flips over, with the axis of rotation of the telescopic pipe relative to the dust collection structure, the axis of rotation of the telescopic pipe relative to the dust removal structure, and the axis of rotation of the furnace body all parallel, the telescopic pipe will passively change its angle relative to the dust collection structure and the dust removal structure. At the same time, the telescopic pipe will also passively lengthen or shorten to adapt to the flipping of the furnace body, thereby ensuring the normal operation of the medium-frequency furnace dust treatment device. Attached Figure Description

[0017] Figure 1 This is a top view of the medium-frequency furnace dust treatment device according to an embodiment of the present utility model, wherein the arrow indicates the direction of dust flow;

[0018] Figure 2 This is a front view structural schematic diagram of the medium-frequency furnace dust treatment device according to an embodiment of this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Furnace body; 11. Furnace opening; 12. Furnace nozzle; 2. Smoke and dust collection structure; 21. Annular pipe; 22. Transition pipe assembly; 221. First transition pipe; 222. Second transition pipe; 2221. Straight pipe section; 3. Dust removal structure; 31. Smoke and dust pipe; 4. Support structure; 41. First support rod; 42. Second support rod; 5. Telescopic pipe; 61. First tubular rotary joint; 62. Second tubular rotary joint; 7. Wall; 8. Tilting platform. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, in the attached diagram, the Z-axis represents the vertical direction, that is, the up-down direction, with the positive Z-axis indicating up and the negative Z-axis indicating down; the X-axis represents the longitudinal direction, that is, the front-back direction, with the positive X-axis indicating front and the negative X-axis indicating back; the Y-axis represents the transverse direction, that is, the left-right direction, with the positive Y-axis indicating left and the negative Y-axis indicating right. It should also be noted that the aforementioned representations of the Z-axis, X-axis, and Y-axis are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] See Figure 1-2 An embodiment of the present invention provides a medium-frequency furnace dust treatment device, comprising a furnace body 1, a dust collection structure 2, a dust removal structure 3, and a telescopic pipe 5; the dust collection structure 2 is fixed relative to the furnace body 1 and is disposed at the furnace opening 11 of the furnace body 1; one end of the telescopic pipe 5 is rotatably connected to and communicates with the dust removal structure 3, and the other end of the telescopic pipe 5 is rotatably connected to and communicates with the dust collection structure 2; wherein, the axis of rotation of the telescopic pipe 5 relative to the dust collection structure 2, the axis of rotation of the telescopic pipe 5 relative to the dust removal structure 3, and the axis of rotation of the furnace body 1 are parallel.

[0025] It should be noted that, in this embodiment, one end of the telescopic tube 5 is rotatably connected to the dust removal structure 3 about an axis, and the axis of rotation of the telescopic tube 5 relative to the dust removal structure 3 refers to this axis; similarly, the other end of the telescopic tube 5 is rotatably connected to the smoke and dust collection structure 2 about an axis, and the axis of rotation of the telescopic tube 5 relative to the smoke and dust collection structure 2 refers to this axis; the axis around which the furnace body 1 rotates refers to the axis around which it rotates.

[0026] In the medium-frequency furnace dust treatment device of this embodiment, the dust collection structure 2 is relatively fixed at the furnace opening 11 of the furnace body 1, so that the dust collection structure 2 can rotate with the furnace body 1, ensuring that the relative position of the dust collection structure 2 and the furnace opening 11 remains unchanged. In this way, even when the furnace body 1 is rotated to pour out molten iron (molten iron is poured out from the furnace nozzle 12 on one side of the furnace body 1), the dust collection structure 2, which is relatively fixed with the furnace body 1, can always effectively collect the dust at the furnace opening 11, and the overall dust collection rate is high.

[0027] In addition to the dust collection structure 2 for capturing dust, the medium-frequency furnace dust treatment device also includes a telescopic pipe 5 and a dust removal structure 3 connected in sequence with the dust collection structure 2. The dust captured by the dust collection structure 2 can enter the dust removal structure 3 through the telescopic pipe 5, and be discharged after being removed and purified by the dust removal structure 3. This ultimately prevents environmental pollution, ensures the health of workers, and does not affect the workers' vision, thus ensuring the normal operation of the prebaked anode assembly production process.

[0028] In this medium-frequency furnace dust treatment device, one end of the telescopic pipe 5 is rotatably connected to and communicates with the dust removal structure 3, and the other end of the telescopic pipe 5 is rotatably connected to and communicates with the dust collection structure 2. Thus, when the furnace body 1 carrying the dust collection device flips over, with the axis of rotation of the telescopic pipe 5 relative to the dust collection structure 2, the axis of rotation of the telescopic pipe 5 relative to the dust removal structure 3, and the axis of flipping of the furnace body 1 parallel, the telescopic pipe 5 will passively change its angle relative to the dust collection structure 2 and the dust removal structure 3. At the same time, the telescopic pipe 5 will also passively lengthen or shorten to adapt to the flipping of the furnace body 1, and ultimately ensure the normal operation of the medium-frequency furnace dust treatment device.

[0029] See Figure 1-2 Optionally, the medium-frequency furnace dust treatment device further includes a tilting platform 8, wherein the furnace body 1 and the dust collection structure 2 are respectively disposed on the tilting platform 8, and the furnace body 1 and the dust collection structure 2 are used to tilt along with the tilting platform 8.

[0030] In this embodiment, the dust removal structure 3 is a fixed structure, which can be fixed to the wall 7. Its position and angle remain unchanged. The fixed dust removal structure 3 can be used to treat the smoke and dust from multiple medium-frequency furnaces or / and the flue gas from other process links in the plant. The furnace body 1 can be installed on the tilting platform 8. The tilting platform 8 serves several purposes: first, it can rotate the furnace body 1 along with the furnace body 1 during the tilting process; second, it facilitates the arrangement and connection of the hydraulic cylinders, allowing the tilting platform 8 to rotate the furnace body 1 under the drive of the hydraulic cylinders; third, it can serve as an intermediate component for the relative fixation of the furnace body 1 and the dust collection structure 2, i.e., the dust collection structure 2 and the furnace body 1 are respectively fixed to the tilting platform 8 to achieve relative fixation between the dust collection structure 2 and the furnace body 1, and the furnace body 1 and the dust collection structure 2 can rotate along with the tilting platform 8; fourth, it can serve as a work platform for workers. Specifically, in the initial state when the tilting platform 8 is not tilted, workers can stand on the tilting platform 8 to perform operations such as slag removal on the iron blocks inside the furnace body 1, and workers can also stand on the tilting platform 8 to observe the smelting of the iron blocks inside the furnace body 1; of course, to facilitate these operations, the furnace opening 11 at the top of the furnace body 1 can be flush with or nearly flush with the upper side of the tilting platform 8.

[0031] like Figure 2 As shown, when the tilting platform 8 tilts together with the furnace body 1 and the dust collection structure 2, the telescopic pipe 5 will passively change its angle and length to adapt to the tilting of the tilting platform 8, provided that the axis of rotation of the telescopic pipe 5 relative to the dust collection structure 2 (parallel to the X-axis), the axis of rotation relative to the dust removal structure 3, and the axis of tilting of the furnace body 1 are parallel. While ensuring that the medium-frequency furnace dust treatment device can effectively collect dust from the furnace body 1 at different angles, the movement of this medium-frequency furnace dust treatment device is a passive movement, requiring no additional electric or pneumatic drive device, which is both energy-saving and convenient, and also reduces maintenance costs.

[0032] See Figure 1-2 Optionally, the dust removal structure 3 includes a dust pipe 31 and a dust collection box; one end of the dust pipe 31 is connected to the dust collection box, and the other end of the dust pipe 31 is rotatably connected to and connected to the end of the telescopic pipe 5 away from the dust collection structure 2.

[0033] In this embodiment, the dust removal structure 3 includes a dust collection box (not shown in the figure) for direct dust removal and a flue pipe 31 leading to the dust collection box. The diameter of the flue pipe 31 is adapted to the dust collection box so that after the flue pipe 31 with this diameter sends the flue gas to the dust collection box, the dust collection box can remove dust efficiently and effectively. The dust collection box can be set outside the factory building. Firstly, this reduces the space occupied inside the factory building. Secondly, after the dust collection box purifies the gas containing flue gas, the purified gas can be directly discharged into the outside atmosphere, which is efficient and convenient.

[0034] In this embodiment, the telescopic tube 5 is specifically rotatably connected and communicated with the dust removal structure 3 by rotating it with the dust pipe 31 located in the factory. Through this cooperation between the tubes, it is easier to achieve relative rotation and communication between the two.

[0035] One end of the telescopic pipe 5 can be rotatably connected to and communicate with the smoke pipe 31 via the first tubular rotary joint 61, which is simple and reliable. It is understood that the first tubular rotary joint 61 can be a conventional pipe connection device, which allows the two pipes (corresponding to the telescopic pipe 61 and the smoke pipe 31 in this embodiment) to rotate relative to each other, and always ensures the sealing of the fluid flow between the two pipes; since the technology of "allowing the two pipes to rotate relative to each other and communicate via the tubular rotary joint" can be existing technology, it will not be described in detail here.

[0036] It is understandable that when the medium-frequency furnace dust treatment device collects dust, it can do so through negative pressure. That is, a negative pressure device (not shown in the figure) is provided inside or outside the dust removal structure 3. The negative pressure device creates a vacuum or near-vacuum negative pressure environment inside the dust removal structure 3, and then absorbs the dust at the furnace opening 11 through negative pressure.

[0037] In this embodiment, the dust collection structure 2 is located on the upper side of the flipping platform 8. One end (top) of the telescopic pipe 5 is connected to the dust pipe 31, and the other end (bottom) of the telescopic pipe 5 is connected to the dust collection structure 2. That is to say, these pipes are all arranged above ground. Compared with burying them underground, this arrangement in this embodiment makes it easier to clean the pipes and shorten the overall length of the pipes. In other words, by arranging the pipes above ground, the dust at the furnace opening 11 only needs a short pipe journey to enter the dust removal structure 3. Ensuring a small negative pressure environment inside the dust removal structure 3 allows the dust collection structure 2 to absorb the dust.

[0038] See Figure 2 The end of the flue pipe 31 furthest from the flue dust collection structure 2 is always higher than the tilting platform 8, the furnace body 1, and the flue dust collection structure 2. As the furnace body 1 tilts, its height also changes accordingly. When the furnace body 1 tilts to its highest position, the flue pipe 31 is still higher than the highest part of the furnace body 1 and the flue dust collection structure 2, which ensures that the telescopic pipe 5 will not interfere with the tilting furnace body 1 or the tilting platform 8.

[0039] See Figure 1-2 Optionally, the medium-frequency furnace dust treatment device also includes a support structure 4, and the dust pipe 31 is used to be fixed to the wall 7 through the support structure 4.

[0040] In this embodiment, the dust pipe 31 can be fixed to the wall 7 via the support structure 4, thus fixing the dust pipe 31 at a high altitude. This not only avoids affecting the movement or operation of ground personnel and equipment, but also ensures that the end of the telescopic pipe 5 connected to the dust pipe 31 is always higher than the tilting platform 8, the furnace body 1, and the dust collection structure 2. The support structure 4 may include multiple support rods, which are distributed sequentially along the extension direction of the dust pipe 31. One end of each support rod is connected to the dust pipe 31, and the other end is connected to the wall 7 to ensure the stability of the dust pipe 31 after fixing. More specifically, for example, two of the multiple support rods may be a first support rod 41 and a second support rod 42. The first support rod 41 is arranged horizontally, and the second support rod 42 can be arranged at an angle. By supporting the dust pipe 31 with support rods of different inclination directions, the structural strength and stability of the dust pipe 31 can be further improved.

[0041] See Figure 1-2 Optionally, the smoke and dust collection structure 2 includes an annular pipe 21, which surrounds the furnace opening 11, and the inner wall of the annular pipe 21 is provided with collection holes.

[0042] The inner wall of the annular tube 21 refers to the wall of the annular tube near the inner side of the annulus. Similarly, the outer wall of the annular tube 21 refers to the wall of the annular tube near the outer side of the annulus.

[0043] In this embodiment, the structure for directly capturing smoke and dust in the smoke and dust collection structure 2 is an annular pipe 21. This annular pipe 21 can be fixed on the tilting platform 8, and it surrounds the furnace opening 11 of the furnace body 1, rather than covering it. Thus, when pig iron needs to be added to the furnace body 1, it can be moved downwards via the overhead crane suction cup to a position close to the annular pipe 21, and then the adsorbed pig iron can be placed into the furnace body 1. The annular pipe 21 will not interfere with the overhead crane suction cup feeding process.

[0044] It should be noted that, in order to avoid the instantaneous generation of a large amount of high-concentration smoke and dust inside the furnace body 1 during the overhead crane suction cup feeding process, the electromagnetic suction cup of the overhead crane can be equipped with a power-off magnetic preservation function. The feeding method into the furnace body 1 can be changed from the original single feeding to continuous multiple feedings. This avoids the instantaneous generation of a large amount of high-concentration smoke and dust during feeding, and ultimately achieves a small and even amount of smoke and dust during overhead crane suction cup feeding, which can be promptly captured by the annular pipe 21. Specifically, when the overhead crane suction cup feeds continuously multiple times, since the overhead crane suction cup stops near the annular pipe 21, the small amount and even amount of smoke and dust generated inside the furnace body 1 can only flow upward from the position between the overhead crane suction cup and the annular pipe 21. However, under the negative pressure inside the dust removal structure 3, the upward-flowing smoke and dust will be absorbed by the collection holes on the inner wall of the annular pipe 21.

[0045] Optionally, a plurality of collection holes are provided, and the plurality of collection holes are distributed along the circumferential and / or axial direction of the annular tube 21 on the inner sidewall of the annular tube 21.

[0046] In this embodiment, the inner wall of the annular tube 21 is provided with multiple collection holes. These collection holes are arranged in an array along the circumference and / or axial direction of the annular tube 21 on its inner sidewall, ensuring that the annular tube 21 has excellent dust collection capability and that dust leakage is almost nonexistent. The annular tube 21 of this invention effectively collects dust around the furnace opening 11 and throughout the three stages of furnace body 1—feeding via the overhead crane suction cup, smelting, and tapping—with a dust collection rate greater than 98%.

[0047] See Figure 1-2 Optionally, the dust collection structure 2 further includes a transition tube assembly 22; one end of the transition tube assembly 22 is connected to the outer wall of the annular tube 21, and the other end of the transition tube assembly 22 is rotatably connected to and connected to the end of the telescopic tube 5 away from the dust collection structure 2.

[0048] In this embodiment, the annular pipe 21 is generally annular, which makes it inconvenient to rotate and connect with the bottom end of the telescopic pipe 5. Based on this consideration, the dust collection structure 2 also includes a transition pipe group 22, so that the bottom end of the telescopic pipe 5 can be rotated and connected with the end of the transition pipe group 22 away from the annular pipe 21. On this basis, the dust collected by the annular pipe 21 enters the telescopic pipe 5 through the transition pipe group 22, and then enters the dust collection box through the dust pipe 31.

[0049] In addition, the transition pipe assembly 22, like the annular pipe 21, can be fixed on the tilting platform 8. The presence of the transition pipe assembly 22 can also prevent the telescopic pipe 5 from being directly connected to the annular pipe 21. Instead, it is connected to the end of the transition pipe assembly 22 away from the annular pipe 21. The end of the transition pipe assembly 22 away from the annular pipe 21 can extend beyond the tilting platform 8 or to the edge of the tilting platform 8. In this way, after the telescopic pipe 5 is connected to the transition pipe assembly 22, the telescopic pipe 5 will not occupy the space on the upper side of the tilting platform 8, thereby ensuring that the workers will not be affected by the telescopic pipe 5 when performing slag removal operations on the tilting platform 8.

[0050] See Figure 1-2 Optionally, the axis of the furnace body 1's rotation is located on one side of the furnace body 1, and the transition pipe assembly 22 is located on the side of the annular pipe 21 away from the axis of the furnace body 1's rotation.

[0051] In this embodiment, as Figure 1-2 As shown, the axis of rotation of the furnace body 1 is located on the left side of the furnace body 1, which is also equivalent to the left side of the annular pipe 21. The transition pipe group 22 is set on the rotation platform 8 on the right side of the annular pipe 21. In this case, the travel distance of the smoke and dust in the pipeline can be reduced when the furnace body 1 rotates. Specifically, when the furnace body 1 rotates around its left rotation axis, the right edge of the furnace opening 11 is at the highest position of the furnace body 1. At this time, the smoke and dust in the furnace body 1 will basically flow upward from the right edge of the furnace opening. The smoke and dust flowing out here enters the annular pipe 21 through the adjacent collection hole, and only needs a very short travel distance to enter the transition pipe group 22. Ultimately, the travel distance of the smoke and dust in the pipeline can be reduced to a certain extent, and the smoke and dust treatment efficiency is higher.

[0052] See Figure 1 Optionally, the transition pipe assembly 22 includes a first transition pipe 221 and a second transition pipe 222 connected to each other; the first transition pipe 221 communicates with the annular pipe 21, and the extension direction of the first transition pipe 221 is parallel to the radial direction of the annular pipe 21; the second transition pipe 222 includes a bent pipe portion and a straight pipe portion 2221 connected to each other, the end of the bent pipe portion away from the straight pipe portion 2221 is connected to the first transition pipe 221, and the end of the straight pipe portion 2221 away from the bent pipe portion is connected to the telescopic pipe 5.

[0053] In this embodiment, the transition tube group 22 specifically includes a first transition tube 221 and a second transition tube 222. The first transition tube 221 extends radially along the annular tube 21, thereby allowing the second transition tube 222 connected to the first transition tube 221 to be far away from the annular tube 21. For example, the presence of the first transition tube 221 allows the second transition tube 222 to be located at the edge of the flipping platform 8, thereby ensuring that the telescopic tube 5 connected to the second transition tube 222 will hardly occupy the space on the upper side of the flipping platform 8.

[0054] Since the transition pipe group 22 is located on the side of the annular pipe 21 away from the turning axis of the furnace body 1, that is, the transition pipe group 22 is located on the right side of the annular pipe 21 in the figure, when the first transition pipe 221 gradually extends towards the right edge of the turning platform 8, the extension direction of the first transition pipe 221 can be the radial direction of the annular pipe 21, so that it can extend to the right edge of the turning platform 8 (or close to the right edge) with a shorter length, thereby shortening the dust travel inside the pipe.

[0055] Furthermore, in this embodiment, the second transition pipe 222 is a curved pipe, comprising a curved section and a straight section 2221. The straight section 2221 can be arranged approximately perpendicular to the telescopic pipe 5, facilitating easy rotational connection and communication between the straight section 2221 and the telescopic pipe 5 using the second tubular rotary joint 62, resulting in a simple and reliable structure. The curved section can transitionally connect the straight section 2221 to the first transition pipe 221, ensuring that the smoke entering the annular pipe 21 can sequentially pass through the first transition pipe 221, the curved section of the second transition pipe 222, and the straight section 2221 before entering the telescopic pipe 5. It is understood that without the curved second transition pipe 222, it would be difficult to rotatably connect and communicate between the bottom end of the telescopic pipe 5 and the first transition pipe 221 using a tubular rotary joint.

[0056] As mentioned earlier, the end (bottom end) of the telescopic pipe 5 furthest from the flue pipe 31 is rotatably connected and communicates with the straight pipe portion 2221 of the second transition pipe 222 via the second tubular rotary joint 62. It is understood that, like the aforementioned first tubular rotary joint 61, the second tubular rotary joint 62 is also a conventional pipe connection device. It allows the two pipes (corresponding to the telescopic pipe 61 and the straight pipe portion 2221 of the second transition pipe 222 in this embodiment) to rotate relative to each other, while always ensuring a tight seal during fluid flow between the two pipes.

[0057] In addition, although the telescopic pipe 5 has its own telescopic function, it also has its own sealing function; for example, the telescopic pipe 5 may include a first pipe and a second pipe that can move relative to each other along its axial direction, and a sealing ring is provided between the first pipe and the second pipe. The sealing ring can be fixed at the pipe wall of the first pipe or the second pipe to ensure that the telescopic pipe 5 always has a sealing function when it telescopically extends and retracts, and the fluid will not leak from between the first pipe and the second pipe.

[0058] See Figure 1 Optionally, the diameter of the first transition tube 221 decreases in the direction in which the first transition tube 221 gradually moves away from the annular tube 21; and / or, the bending shape of the bent portion of the second transition tube 222 is a quarter-circle arc.

[0059] In this embodiment, the diameters of the second transition pipe 222, the telescopic pipe 5, and the flue gas pipe 31 are the same or substantially the same to ensure that the flue gas at the corresponding flow rate of these pipes can be efficiently and effectively purified after entering the dust collection box. The diameter of the first transition pipe 221 decreases gradually away from the annular pipe 21, that is, the diameter of the first transition pipe 221 increases gradually away from the second transition pipe 222. The first transition pipe 221 is similar to a trumpet or cone shape, which facilitates the guidance of the flue gas in the annular pipe 21 to the second transition pipe 222. The bending shape of the bent section of the second transition pipe 222 can be a quarter-circle arc, so that the straight pipe section 2221 is perpendicular to the first transition pipe 221. When the extension direction of the first transition pipe 221 is parallel to the Y-axis direction, the axis of the straight pipe section 2221 connected by the quarter-circle arc bend is parallel to the X-axis direction, which ensures that the straight pipe section 2221 parallel to the X-axis direction can be perpendicular to the telescopic pipe 5, so as to be rotatably connected and connected through the second tubular rotary joint 62.

[0060] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" and "second" may explicitly or implicitly include at least one of those features.

[0061] Although the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A medium-frequency furnace dust treatment device, characterized in that, The furnace includes a furnace body (1), a dust collection structure (2), a dust removal structure (3), and a telescopic pipe (5); the dust collection structure (2) is fixed relative to the furnace opening (11) of the furnace body (1); one end of the telescopic pipe (5) is rotatably connected to and communicates with the dust removal structure (3), and the other end of the telescopic pipe (5) is rotatably connected to and communicates with the dust collection structure (2); wherein, the axis of rotation of the telescopic pipe (5) relative to the dust collection structure (2), the axis of rotation of the telescopic pipe (5) relative to the dust removal structure (3), and the axis of rotation of the furnace body (1) are parallel.

2. The medium-frequency furnace dust treatment device according to claim 1, characterized in that, The dust removal structure (3) includes a dust pipe (31) and a dust collection box; one end of the dust pipe (31) is connected to the dust collection box, and the other end of the dust pipe (31) is rotatably connected to and connected to the end of the telescopic pipe (5) away from the dust collection structure (2).

3. The medium-frequency furnace dust treatment device according to claim 1, characterized in that, It also includes a flipping platform (8), the furnace body (1) and the dust collection structure (2) are respectively disposed on the flipping platform (8), and the furnace body (1) and the dust collection structure (2) are used to flip with the flipping platform (8).

4. The medium-frequency furnace dust treatment device according to claim 2, characterized in that, It also includes a support structure (4), through which the dust pipe (31) is fixed to the wall (7).

5. The medium-frequency furnace dust treatment device according to any one of claims 1-4, characterized in that, The dust collection structure (2) includes an annular tube (21) that surrounds the furnace opening (11), and the inner wall of the annular tube (21) is provided with collection holes.

6. The medium-frequency furnace dust treatment device according to claim 5, characterized in that, The collection holes are provided in multiple ways, and the multiple collection holes are distributed along the circumference and / or axial direction of the annular tube (21) on the inner sidewall of the annular tube (21).

7. The medium-frequency furnace dust treatment device according to claim 5, characterized in that, The dust collection structure (2) also includes a transition tube assembly (22); one end of the transition tube assembly (22) is connected to the outer wall of the annular tube (21), and the other end of the transition tube assembly (22) is rotatably connected to and connected to the end of the telescopic tube (5) away from the dust collection structure (2).

8. The medium-frequency furnace dust treatment device according to claim 7, characterized in that, The axis of the furnace body (1) is located on one side of the furnace body (1), and the transition pipe assembly (22) is located on the side of the annular pipe (21) away from the axis of the furnace body (1).

9. The medium-frequency furnace dust treatment device according to claim 8, characterized in that, The transition pipe assembly (22) includes a first transition pipe (221) and a second transition pipe (222) connected to each other; the first transition pipe (221) is connected to the annular pipe (21), and the extension direction of the first transition pipe (221) is parallel to the radial direction of the annular pipe (21); the second transition pipe (222) includes a bent pipe portion and a straight pipe portion (2221) connected to each other, the end of the bent pipe portion away from the straight pipe portion (2221) is connected to the first transition pipe (221), and the end of the straight pipe portion (2221) away from the bent pipe portion is connected to the telescopic pipe (5).

10. The medium-frequency furnace dust treatment device according to claim 9, characterized in that, In the direction in which the first transition tube (221) gradually moves away from the annular tube (21), the diameter of the first transition tube (221) decreases; and / or, the bending shape of the bent section is a quarter-circle arc.

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