An apparatus for fly ash melting

Abstract

The application relates to the field of fly ash treatment equipment, in particular to a device for fly ash melting, which comprises a furnace body arranged on the ground and a feeding pipe arranged on the furnace body, a mounting shaft is rotationally connected to the upper surface of the furnace body, one end of the mounting shaft extends into the furnace body, a dispersion sieve cylinder is fixedly connected to the end of the mounting shaft extending into the furnace body, a plurality of dispersion holes are arranged on the circumferential surface of the dispersion sieve cylinder, the feeding pipe is arranged on the mounting shaft and rotationally connected to the mounting shaft, the feeding pipe is in communication with the mounting shaft and the dispersion sieve cylinder, and a driving assembly for driving the mounting shaft to rotate is arranged on the furnace body. The application has the effect that the fly ash in the furnace body can be fully melted.

Description

Technical Field

[0001] This application relates to the technical field of fly ash treatment equipment, and in particular to an apparatus for fly ash melting. Background Technology

[0002] Waste incineration produces fly ash, which contains a large amount of harmful substances. Direct emission of fly ash into the air or soil will pollute the air and soil. The fly ash needs to be melted to produce slag, which can be recycled.

[0003] Current methods for treating fly ash typically employ a melting furnace. The furnace is equipped with a feed pipe and an exhaust pipe connected to a dust removal device. This dust removal device further removes dust from the generated fumes, ensuring that the gas released into the atmosphere is pollution-free. During the melting process, oxygen is introduced into the furnace to raise the temperature to 1300–1500°C. The fly ash is then fed into the furnace through a conveying assembly, where it is melted, ultimately producing slag.

[0004] In the aforementioned related technologies, when fly ash enters the melting furnace from the feed pipe, it will fall directly towards the bottom of the melting furnace under the action of gravity when it comes out from the discharge pipe. It stays in the middle of the melting furnace for a short time. At the same time, clumps of fly ash will fall together during the falling process, so that some of the clumps of fly ash cannot be fully melted, resulting in a certain amount of fly ash remaining in the slag. Summary of the Invention

[0005] In order to ensure that the fly ash entering the furnace can be fully melted, this application provides an apparatus for fly ash melting.

[0006] The device for fly ash melting provided in this application adopts the following technical solution:

[0007] An apparatus for melting fly ash includes a furnace body installed on the ground and a feed pipe installed on the furnace body. An installation shaft is rotatably connected to the upper surface of the furnace body. One end of the installation shaft extends into the furnace body, and a dispersing screen cylinder is installed at the end of the installation shaft extending into the furnace body. The dispersing screen cylinder has multiple dispersing holes on its circumferential surface. The feed pipe passes through the installation shaft and is rotatably connected to the installation shaft. The feed pipe communicates with the dispersing screen cylinder through the installation shaft. A drive assembly for driving the installation shaft to rotate is installed on the furnace body.

[0008] By adopting the above technical solution, when melting fly ash, the fly ash first enters the dispersing screen cylinder from the feed pipe. At the same time, the drive component drives the mounting shaft to rotate, and the rotation of the mounting shaft drives the dispersing screen cylinder to rotate, causing the dispersing screen cylinder to generate centrifugal force. Under the action of centrifugal force, the fly ash entering the dispersing screen cylinder moves towards the inner wall of the dispersing screen cylinder and enters the furnace body through multiple dispersing holes for melting. This reduces the occurrence of fly ash clumping in the furnace body and makes the fly ash melt more fully in the furnace body.

[0009] Optionally, the drive assembly includes a drive motor fixed on the furnace body, a drive gear mounted on the output shaft of the drive motor, and a driven gear fixed on the mounting shaft, wherein the drive gear and the driven gear mesh.

[0010] By adopting the above technical solution, when the dispersing screen cylinder is rotated, the drive motor works and drives the drive gear to rotate. Since the drive gear and the driven gear mesh, the driven gear and the mounting shaft can be driven to rotate, thereby driving the dispersing screen cylinder to rotate. This achieves the purpose of conveniently driving the dispersing screen cylinder to rotate, making it more convenient to use.

[0011] Optionally, a sinusoidal groove is formed on the inner wall of the furnace body, with the groove extending around the entire inner wall. A movable rod is fixedly installed on the dispersing screen cylinder, passing through an mounting shaft and sliding along the length of the shaft. A telescopic rod is fixedly connected to the dispersing screen cylinder, with one end of the telescopic rod away from the dispersing screen cylinder engaged in the sinusoidal groove. When the telescopic rod is at the highest point of the sinusoidal groove, the dispersing screen cylinder is at its highest position; when the telescopic rod is at the lowest point of the sinusoidal groove, the dispersing screen cylinder is at its lowest position.

[0012] By adopting the above technical solution, when the drive component drives the mounting shaft to rotate, the telescopic rod is slidably connected to the mounting shaft, and the telescopic rod on the dispersing screen cylinder is engaged in the sinusoidal groove. Under the action of the sinusoidal groove, the dispersing screen cylinder can rotate while also reciprocating along the axial direction of the mounting shaft, thereby improving the fluidity of fly ash entering the dispersing screen cylinder, reducing fly ash agglomeration, and making it easier for fly ash to enter the furnace body from the dispersing hole.

[0013] Optionally, the end of the telescopic rod away from the dispersing screen cylinder is rotatably connected to a universal ball, and the surface of the universal ball abuts against the sinusoidal groove.

[0014] By adopting the above technical solution, the friction of the telescopic rod in the sinusoidal groove is reduced under the action of the omnidirectional ball, thereby making the telescopic rod move more smoothly.

[0015] Optionally, a cone is provided at the bottom of the dispersing screen cylinder, and the size of the bottom surface of the cone is the same as the size of the bottom surface of the dispersing screen cylinder.

[0016] By adopting the above technical solution, when fly ash enters the dispersing screen cylinder from the feed pipe, the fly ash cannot enter the bottom surface of the dispersing screen cylinder because a cone is set at the bottom of the dispersing screen cylinder. Therefore, when the dispersing screen cylinder rotates, it is more convenient for fly ash to enter the furnace body from the dispersing hole.

[0017] Optionally, the furnace body is equipped with a flue pipe, and a filter assembly for secondary filtration of the flue gas is installed on the flue pipe; the filter assembly includes a filter box installed on the flue pipe and a filter barrel disposed inside the filter box, the surface of the filter barrel abutting against the inner wall of the filter box.

[0018] By adopting the above technical solution, when the fly ash is melted, smoke is generated, which contains a certain amount of fly ash. Then, it enters the filter box and the fly ash in the smoke is filtered through the filter barrel, thereby further reducing the fly ash content in the smoke.

[0019] Optionally, the filter bucket is rotatably connected to the filter housing, and a scraper is fixedly installed on the filter housing, with the side of the scraper away from the filter housing abutting against the surface of the filter bucket.

[0020] By adopting the above technical solution, when filtering the smoke, the fly ash in the smoke will be adsorbed onto the filter barrel. Then the filter barrel rotates, and the fly ash adsorbed on the filter barrel is cleaned by the scraper. On the other hand, due to the rotation of the filter barrel, the area that the filter barrel can filter can be increased, thereby improving the filtration effect of the filter screen.

[0021] Optionally, a connecting pipe is provided at the bottom of the filter box. The connecting pipe includes a vertical part and an inclined part. One end of the vertical part is fixed to the bottom of the filter box, and the other end is integrally connected to the inclined part. The end of the inclined part away from the vertical part is connected to the furnace body.

[0022] By adopting the above technical solution, the fly ash cleaned by the scraper falls to the bottom of the filter box and enters the inclined part through the vertical part. Since the inclined part is connected to the furnace body, the fly ash can directly enter the furnace body under the action of gravity, thereby further melting the fly ash in the flue and reducing the fly ash content in the flue.

[0023] Optionally, a sealing assembly is provided inside the inclined portion. The sealing assembly includes a rotating shaft that rotates on the inclined portion and a plurality of sealing plates disposed on the rotating shaft. A sealing plate is slidably connected to each sealing plate. A push spring is provided on the sealing plate. The end of the push spring away from the sealing plate is fixed to the sealing plate. The push spring is used to push the sealing plate against the inner wall of the inclined portion.

[0024] By adopting the above technical solution, the fly ash scraped by the scraper enters the inclined section through the vertical section, and then falls onto the sealing plate under the action of the sealing plate. Then the rotating shaft rotates, which allows the fly ash to enter the furnace body. At the same time, because the pushing spring pushes the sealing plate against the inner wall of the vertical section, the amount of smoke entering the inclined section from the furnace body can be reduced when transporting fly ash.

[0025] Optionally, the furnace body is provided with two spiral tubes, each with multiple air outlet holes on its surface, and the two spiral tubes are used to introduce oxygen and natural gas respectively.

[0026] By adopting the above technical solution, when oxygen and natural gas are introduced into the two spiral tubes respectively, the oxygen and natural gas can be distributed more evenly in the furnace body under the action of the spiral tubes. At the same time, the oxygen and natural gas are mixed more evenly, resulting in a more uniform temperature distribution during combustion in the furnace body. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0028] Figure 2 This is a partial cross-sectional view of the furnace body according to an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of a sine groove according to an embodiment of this application.

[0030] Figure 4 This is a partial cross-sectional view of the filter box according to an embodiment of this application.

[0031] Figure 5 This is a schematic diagram showing the connection between the sealing component and the inclined portion in an embodiment of this application.

[0032] Figure 6 This is a cross-sectional schematic diagram of the sealing plate according to an embodiment of this application.

[0033] Reference numerals: 1. Furnace body; 11. Feed pipe; 12. Exhaust pipe; 13. Spiral tube; 14. Cone; 15. Mounting ring; 2. Filter assembly; 21. Filter box; 22. Filter barrel; 3. Dispersion screen cylinder; 31. Dispersion hole; 32. Mounting shaft; 33. Moving rod; 34. Sine groove; 35. Universal ball; 36. Telescopic rod; 4. Drive assembly; 41. Driving gear; 42. Driven gear; 43. Drive motor; 5. Scraper; 51. Control motor; 6. Connecting pipe; 61. Vertical part; 62. Inclined part; 7. Sealing assembly; 71. Rotating shaft; 72. Sealing plate; 8. Sealing plate; 9. Push spring; 10. Rotating motor. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0035] This application discloses an apparatus for melting fly ash. (See also...) Figure 1 An apparatus for melting fly ash includes a furnace body 1 and a feed pipe 11 installed on the furnace body 1. The furnace body 1 is installed on the ground. In this embodiment, the furnace body 1 is configured as an anode furnace as the melting furnace. Fly ash is introduced into the furnace body 1 through the feed pipe 11 and then melted. The melted fly ash generates slag that falls to the bottom of the furnace body 1. The slag is then cooled to become a usable material. Simultaneously, a flue pipe 12 is installed on the furnace body 1, and a filter assembly 2 is installed on the flue pipe 12. The flue gas generated during melting enters the filter assembly 2 through the flue pipe 12 for secondary filtration of the fly ash in the flue gas, thereby reducing the fly ash content in the flue gas.

[0036] Reference Figure 1 and Figure 2 Two spiral tubes 13 are installed inside the furnace body 1. The two spiral tubes 13 are arranged parallel to each other along the height direction of the furnace body 1 and are fixed to the inner wall of the furnace body 1. One end of each spiral tube 13 extends out of the furnace body 1, which facilitates the introduction of natural gas and oxygen into the two spiral tubes 13 respectively. Multiple air outlets are opened on each spiral tube 13 to facilitate the entry of natural gas and oxygen into the furnace body 1 through the air outlets. After the natural gas and oxygen enter the furnace body 1, they are ignited in the furnace body 1 by an ignition device, which increases the temperature inside the furnace body 1 to 1300-1500℃. The spiral tubes 13 make the distribution of natural gas and oxygen in the furnace body 1 more uniform, which is conducive to combustion.

[0037] Reference Figure 1 and Figure 2 A dispersing screen cylinder 3 is installed inside the furnace body 1. The axis of the dispersing screen cylinder 3 is vertically arranged. Multiple dispersing holes 31 are opened on the side wall of the dispersing screen cylinder 3. An installation shaft 32 is installed on the upper surface of the dispersing screen cylinder 3. One end of the installation shaft 32 passes through the top wall of the furnace body 1 and is rotatably connected to the furnace body 1. A drive assembly 4 is installed on the furnace body 1. The drive assembly 4 is used to drive the installation shaft 32 to rotate and drive the dispersing screen cylinder 3 to rotate, so that the dispersing screen cylinder 3 generates a certain centrifugal force. The feed pipe 11 passes through the installation shaft 32 and is rotatably connected to the dispersing screen cylinder 3, and communicates with the inside of the dispersing screen cylinder 3. The feed pipe 11 rotates on the installation shaft 32 and can also slide along the axial direction of the installation shaft 32.

[0038] Reference Figure 1 and Figure 2After the fly ash enters the dispersing screen cylinder 3 through the feed pipe 11, the centrifugal force generated by the drive component 4 driving the dispersing screen cylinder 3 to rotate can throw the fly ash in the dispersing screen cylinder 3 out of the furnace body 1 through the dispersing hole 31, thereby reducing the occurrence of fly ash agglomeration during melting, and thus allowing the fly ash entering the furnace body 1 to melt more fully.

[0039] Reference Figure 1 and Figure 2 A cone 14 is installed at the bottom of the dispersing screen cylinder 3. The bottom surface of the cone 14 is welded to the bottom surface of the dispersing screen cylinder 3, and the bottom surface of the cone 14 and the bottom surface of the dispersing screen cylinder 3 are the same size. This prevents fly ash from falling directly to the bottom surface of the dispersing screen cylinder 3, thus facilitating the fly ash in the dispersing screen cylinder 3 to be thrown out into the furnace body 1 through the dispersing hole 31.

[0040] Reference Figure 1 and Figure 2 A movable rod 33 is welded to the upper surface of the dispersing screen cylinder 3. The movable rod 33 is sleeved on the feed pipe 11 and slides along the axial direction of the mounting shaft 32. In this embodiment, the movable rod 33 passes through the mounting shaft 32 and the horizontal cross section of the movable rod 33 is set to be rectangular, so that the movable rod 33 can only slide on the mounting shaft 32.

[0041] Reference Figure 2 and Figure 3 An installation ring 15 is welded inside the furnace body 1. The installation ring 15 and the dispersing screen cylinder 3 are coaxially arranged, and a sinusoidal groove 34 is formed on the inner wall of the installation ring 15. The sinusoidal groove 34 is arranged around the inner wall of the installation ring 15, making the sinusoidal groove 34 a ring structure. A universal ball 35 is engaged inside the sinusoidal groove 34, so that the surface of the universal ball 35 abuts against the inner wall of the sinusoidal groove 34. A telescopic rod 36 is rotatably connected to the universal ball 35. The end of the telescopic rod 36 away from the universal ball 35 is welded to the dispersing screen cylinder 3. When the dispersing screen cylinder 3 rotates, under the action of the sinusoidal groove 34, the dispersing screen cylinder 3 can move along the trajectory of the sinusoidal groove 34. Since the sinusoidal groove 34 has multiple highest points and multiple lowest points, the dispersing screen cylinder 3 can move along the trajectory of the sinusoidal groove 34. When the universal ball 35 moves to the highest point of the sinusoidal groove 34, the dispersing screen cylinder 3 is at its highest position; when the universal ball 35 is at the lowest point of the sinusoidal groove 34, the dispersing screen cylinder 3 is at its lowest position. Under the action of multiple highest and lowest points of the sinusoidal groove 34, the dispersing screen cylinder 3 can rotate while simultaneously achieving up-and-down reciprocating motion, thereby accelerating the flow of fly ash within the dispersing screen cylinder 3 and reducing fly ash adhesion to the inner wall of the dispersing screen cylinder 3. In this embodiment, the feed pipe 11 can rotate on the moving rod 33 while also sliding along the length of the moving rod 33. Therefore, when the dispersing screen cylinder 3 reciprocates up and down, it drives the moving rod 33 and the feed pipe 11 to also reciprocate up and down. Since the universal ball 35 is rotatably connected to the telescopic rod 36, the friction between the universal ball 35 and the sinusoidal groove 34 can be reduced when the dispersing screen cylinder 3 rotates.

[0042] Reference Figure 1 and Figure 2 The drive assembly 4 includes a drive gear 41, a driven gear 42, and a drive motor 43. The drive motor 43 is fixed to the upper surface of the furnace body 1 by a support frame. The drive gear 41 is fixed on the output shaft of the drive motor 43. The driven gear 42 and the mounting shaft 32 are coaxially fixed and meshed. The drive gear 41 and the driven gear 42 are meshed together. The rotation of the drive motor 43 drives the drive gear 41 to rotate. Since the drive gear 41 and the driven gear 42 are meshed together, the driven gear 42 and the mounting shaft 32 can rotate, thereby driving the dispersing screen cylinder 3 to rotate.

[0043] Reference Figure 2 and Figure 4 The filter assembly 2 includes a filter housing 21 and a filter barrel 22. The filter housing 21 is installed on the exhaust pipe 12, and the exhaust pipe 12 and the filter housing 21 are connected. The filter barrel 22 is vertically oriented and is rotatably connected to the inner wall of the filter housing 21. Figure 4 (The arrow at point A points in the middle indicates the direction of rotation of the filter barrel 22). The surface of the filter barrel 22 abuts against the inner wall of the filter box 21. The smoke enters the filter box 21 from the exhaust pipe 12. Some of the unmelted fly ash will be adsorbed on the filter barrel 22, which will then further filter the smoke, thereby reducing the fly ash content in the smoke.

[0044] Reference Figure 2 and Figure 4 A scraper 5 is provided on the side of the filter barrel 22 near the furnace body 1. One side of the scraper 5 is welded to the inner wall of the filter box 21, and the other side abuts against the surface of the filter barrel 22. When the filter barrel 22 rotates, the scraper 5 can clean the fly ash adsorbed on the surface of the filter barrel 22, thereby reducing the fly ash on the surface of the filter barrel 22 and improving the filtration effect of the filter barrel 22. In order to facilitate the rotation of the filter barrel 22, a control motor 51 is provided on the filter box 21. The output shaft of the control motor 51 passes through the filter box 21 and is fixed to the top wall of the filter barrel 22.

[0045] Reference Figure 2 and Figure 5 A connecting pipe 6 is provided at the bottom of the filter box 21. The connecting pipe 6 includes a vertical part 61 and an inclined part 62. One end of the vertical part 61 is welded to the bottom of the filter box 21 and communicates with the inside of the filter box 21. The other end is integrally formed with the inclined part 62. The end of the inclined part 62 away from the vertical part 61 is installed on the furnace body 1 and communicates with the inside of the furnace body 1. Figure 4 The fly ash scraped off by scraper 5 enters the vertical part 61, and then enters the furnace body 1 through the inclined part 62 under the action of gravity, where the fly ash is further melted, thereby achieving the purpose of reducing the fly ash content in the flue gas during use.

[0046] Reference Figure 2 , Figure 4 and Figure 5 A sealing assembly 7 is provided inside the inclined section 62. The sealing assembly 7 is used to seal the inclined section 62 to reduce the amount of smoke in the furnace body 1 entering the filter box 21 from the inclined section 62. The sealing assembly 7 includes a rotating shaft 71 and multiple sealing plates 72. The axis of the rotating shaft 71 is horizontally arranged, and the rotation of the rotating shaft 71 is connected to the inclined section 62. Figure 5 The arrow at point B points in the diagram, indicating the rotation direction of the rotating shaft 71; the arrow at point C points in the diagram, indicating the flow direction of fly ash within the inclined section 62. Multiple sealing plates 72 are evenly spaced along the circumference of the rotating shaft 71. In this embodiment, four sealing plates 72 are provided. Each sealing plate 72 is slidably connected to a sealing plate 8, which slides perpendicular to the axis of the rotating shaft 71. (Combined with...) Figure 6 A push spring 9 is provided on the sealing plate 8. One end of the push spring 9 is welded to the sealing plate 8, and the other end is welded to the sealing plate 72. Under the action of the push spring 9, the end of the sealing plate 8 away from the sealing plate 72 is pushed to abut against the inner wall of the inclined part 62. In this embodiment, the side of the sealing plate 8 away from the bottom sealing plate is set as an arc surface to facilitate abutment against the inner wall of the inclined part 62. In order to facilitate the rotation of the rotating shaft 71, a rotating motor 10 is installed on the outer wall of the inclined part 62. The output shaft of the rotating motor 10 is fixedly connected to the rotating shaft 71.

[0047] Reference Figure 2 and Figure 5 After being cleaned by the cleaning plate, the fly ash enters the vertical section 61 and then, under gravity, enters the inclined section 62. Due to the sealing assembly 7, the fly ash remains on the surface of the sealing plate 8. Then, the rotating shaft 71 rotates, causing the sealing plate 72 and the sealing plate 8 to rotate, simultaneously driving the fly ash through the inclined section 62 into the furnace body 1. Because the sealing plate 8 slides on the sealing plate 72, and the push spring 9 can push the sealing plate 8 against the inner wall of the inclined section 62, the effect of reducing the amount of flue gas entering the vertical section 61 from the inclined section 62 when the rotating shaft 71 rotates is reduced.

[0048] The implementation principle of the device for fly ash melting in this application embodiment is as follows: When melting fly ash, oxygen and natural gas are first introduced into the furnace body 1, and then ignited by an igniter to increase the temperature inside the furnace body 1. Fly ash is introduced into the dispersing screen cylinder 3 through the feed pipe 11. The drive component 4 drives the dispersing screen cylinder 3 to rotate. Since the universal ball 35 rotating on the telescopic rod 36 is rotatably connected in the sine groove 34, the dispersing screen cylinder 3 can reciprocate up and down under the action of the sine groove 34. The centrifugal force generated by the rotation of the dispersing screen cylinder 3 can easily throw the fly ash out of the dispersing screen cylinder 3, thereby reducing the occurrence of fly ash clumping during melting, and thus making the fly ash in the furnace body 1 melt more fully.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An apparatus for melting fly ash, comprising a furnace body (1) disposed on the ground and a feed pipe (11) disposed on the furnace body (1), characterized in that: The upper surface of the furnace body (1) is rotatably connected to an installation shaft (32). One end of the installation shaft (32) extends into the furnace body (1). A dispersing screen cylinder (3) is provided at the end of the installation shaft (32) that extends into the furnace body (1). Multiple dispersing holes (31) are provided on the circumferential surface of the dispersing screen cylinder (3). The feed pipe (11) passes through the installation shaft (32) and is rotatably connected to the installation shaft (32). The feed pipe (11) passes through the installation shaft (32) and communicates with the dispersing screen cylinder (3). A drive assembly (4) for driving the installation shaft (32) to rotate is provided on the furnace body (1).

2. The apparatus for fly ash melting according to claim 1, characterized in that: The drive assembly (4) includes a drive motor (43) fixed on the furnace body (1), a drive gear (41) mounted on the output shaft of the drive motor (43) and a driven gear (42) fixed on the mounting shaft (32), wherein the drive gear (41) and the driven gear (42) mesh.

3. The apparatus for fly ash melting according to claim 1, characterized in that: The inner wall of the furnace body (1) is provided with a sinusoidal groove (34), which is formed around the inner wall of the furnace body (1). A moving rod (33) is fixedly installed on the dispersing screen cylinder (3). The moving rod (33) passes through the mounting shaft (32) and slides along the length of the mounting shaft (32). A telescopic rod (36) is fixedly connected to the dispersing screen cylinder (3). The end of the telescopic rod (36) away from the dispersing screen cylinder (3) is engaged in the sinusoidal groove (34). When the telescopic rod (36) is at the highest point of the sinusoidal groove (34), the dispersing screen cylinder (3) is at its highest position. When the telescopic rod (36) is at the lowest point of the sinusoidal groove (34), the dispersing screen cylinder (3) is at its lowest position.

4. The apparatus for fly ash melting according to claim 3, characterized in that: The end of the telescopic rod (36) away from the dispersing screen cylinder (3) is rotatably connected to a universal ball (35), and the surface of the universal ball (35) abuts against the sinusoidal groove (34).

5. The apparatus for fly ash melting according to claim 1, characterized in that: The bottom of the dispersing sieve cylinder (3) is provided with a cone (14), the bottom surface of which is the same size as the bottom surface of the dispersing sieve cylinder (3).

6. The apparatus for fly ash melting according to claim 1, characterized in that: The furnace body (1) is equipped with a flue pipe (12), and the flue pipe (12) is equipped with a filter assembly (2) for secondary filtration of the flue gas. The filter assembly (2) includes a filter box (21) installed on the flue pipe (12) and a filter barrel (22) set inside the filter box (21). The surface of the filter barrel (22) abuts against the inner wall of the filter box (21).

7. The apparatus for fly ash melting according to claim 6, characterized in that: The filter bucket (22) is rotatably connected to the filter box (21). A scraper (5) is fixedly installed on the inner wall of the filter box (21). The side of the scraper (5) away from the filter box (21) abuts against the surface of the filter bucket (22).

8. The apparatus for fly ash melting according to claim 7, characterized in that: The bottom of the filter box (21) is provided with a connecting pipe (6), which includes a vertical part (61) and an inclined part (62). One end of the vertical part (61) is fixed to the bottom of the filter box (21), and the other end is integrally connected with the inclined part (62). The end of the inclined part (62) away from the vertical part (61) is connected to the furnace body (1).

9. The apparatus for fly ash melting according to claim 8, characterized in that: A sealing assembly (7) is provided inside the inclined portion (62). The sealing assembly (7) includes a rotating shaft (71) rotating on the inclined portion (62) and a plurality of sealing plates (72) disposed on the rotating shaft (71). Each sealing plate (72) is slidably connected to a sealing plate (8). A push spring (9) is provided on the sealing plate (8). One end of the push spring (9) away from the sealing plate (8) is fixed on the sealing plate (72). The push spring (9) is used to push the sealing plate (8) against the inner wall of the inclined portion (62).

10. The apparatus for fly ash melting according to claim 1, characterized in that: The furnace body (1) is equipped with two spiral tubes (13), and the surfaces of the two spiral tubes (13) are provided with multiple air outlets. The two spiral tubes (13) are used to introduce oxygen and natural gas respectively.

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