A fly ash filtration and separation treatment device and method for hazardous waste incineration

Abstract

The present application belongs to the technical field of fly ash filtering and separating equipment, and particularly relates to a fly ash filtering and separating treatment device and method in hazardous waste incineration. The device comprises a bag-type dust collector and an intermediate pipe body, wherein the intermediate pipe body is a hollow circular truncated cone structure; a large-diameter end of the intermediate pipe body is fixedly communicated with an air inlet, and a small-diameter end of the intermediate pipe body is fixedly provided with a connecting ring, and an inner diameter end of the connecting ring is fixedly communicated with an air inlet pipe; the device can automatically clean the fly ash accumulated at the end of the pipe without stopping the machine through the cooperation of a rotating pipe and a self-cleaning mechanism, and meanwhile, the filtering effect is not affected; the device can further improve the filtering effect of the fly ash while cleaning the fly ash completely without residues through the cooperation of the intermediate pipe body and the self-cleaning mechanism.

Description

Technical Field

[0001] This invention belongs to the technical field of fly ash filtration and separation equipment, specifically relating to a fly ash filtration and separation treatment device and method in hazardous waste incineration. Background Technology

[0002] Fly ash from hazardous waste incineration refers to the solid waste that, during the incineration process, releases harmful substances from the waste in the form of fine particles carried out of the furnace along with the flue gas after undergoing a high-temperature reaction. Fly ash typically contains toxic and harmful components such as heavy metals and dioxins, which, if not properly handled, can cause serious harm to the environment and human health. Therefore, fly ash needs to be separated and collected to prevent secondary pollution from these harmful substances, and its environmental impact must be minimized through appropriate disposal or treatment.

[0003] Chinese patent application number 202010341496.4 discloses a waste incineration fly ash filtration device based on partial membrane separation. This patent utilizes high-temperature flue gas to cause ammonium chloride powder inside the gasbag to decompose into hydrogen chloride gas and ammonia gas, which then expand continuously. This expansion pushes an arc-shaped movable plate upwards, squeezing hot melt adhesive liquid out of the slow-release bladder. The hot melt adhesive liquid, under the action of microfibers on the outer end of the rubber spikes, covers the outer end of the rubber spikes. The rubber spikes and hot melt adhesive liquid mimic the barbs on an animal's tongue and the mucus on its surface, adsorbing particulate matter in the flue gas. After returning to normal temperature, the reaction of hydrogen chloride gas and ammonia gas generates ammonium chloride solid, causing the gasbag to contract rapidly. Under the action of the pressure difference, particulate matter between the exhaust pipe and the upper filter membrane is absorbed into the slow-release bladder and adsorbed by the adsorption layer and its surface hot melt adhesive, thereby improving the filtration effect of the flue gas.

[0004] Filtration using filter bags is a common practice, and baghouse dust collectors are a prevalent type. However, due to the typically long inlet pipe, airflow loss occurs during the external fan's airflow process, resulting in weaker airflow near the inlet and easy dust accumulation at the pipe ends. External tapping and vibration for cleaning are often insufficient, and manual cleaning after shutting down the machine poses a high-risk health hazard to personnel due to the hazardous substances in the fly ash. Furthermore, conventional cleaning requires increased airflow, which is energy-intensive and reduces the effective settling of fly ash within the baghouse, while also increasing the impact on the filter bags and increasing the risk of damage, potentially leading to hazardous substance leakage. Therefore, finding a way to clean dust thoroughly without affecting filtration is a crucial area of ​​research. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a fly ash filtration and separation treatment device and method for hazardous waste incineration. Through the cooperation of a rotating tube and a self-cleaning mechanism, this invention not only automatically cleans the fly ash accumulated at the pipe ends without stopping the machine, but also does not affect the filtration effect. Furthermore, through the cooperation of the intermediate pipe and the self-cleaning mechanism, this invention not only ensures that fly ash is thoroughly cleaned without residue, but also further improves the filtration effect of the fly ash.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A fly ash filtration and separation treatment device for hazardous waste incineration includes a bag filter and an intermediate tube. The intermediate tube has a hollow frustum structure. The large-diameter end of the intermediate tube is fixedly connected to the air inlet, and the small-diameter end of the intermediate tube is fixedly provided with a connecting ring. The inner diameter end of the connecting ring is fixedly connected to the air inlet pipe. The bag filter is fixedly installed inside a sealing plate, and multiple ventilation holes are opened through the sealing plate. The ventilation holes are fixedly connected to the filter bag; the air inlet is opposite to the side wall of the filter bag. The inner wall of the intermediate tube is equipped with a rotating tube, and multiple sets of self-cleaning mechanisms are installed on the rotating tube. The self-cleaning mechanisms and the intermediate tube together form an air guide surface.

[0007] Furthermore, multiple curved scraper blades are uniformly fixedly connected to the inner diameter end of the connecting ring in the circumferential direction, and the central axis of the multiple curved scraper blades is coaxially arranged with the intermediate tube body; the plane of one end face of the curved scraper blade in the circumferential direction coincides with the central axis, and the other end face is the first inclined surface.

[0008] Furthermore, the rotating tube includes multiple arc blocks, and the circumferential end faces of adjacent arc blocks are fixedly connected by connecting blocks; the two arc surfaces of the arc blocks are respectively in contact with the inner wall of the middle tube and the curved scraper blade; multiple sliding holes are evenly penetrated on the connecting block, and the sliding holes are slidably connected to the self-cleaning mechanism.

[0009] Furthermore, the self-cleaning mechanism includes a curved guide plate, on which multiple sliding rods are fixedly connected, and the sliding rods are slidably connected to sliding holes; a limiting block is fixedly provided at the end of the sliding rod, and a return spring is sleeved on the sliding rod, with both ends of the return spring fixedly connected to the limiting block and the connecting block, respectively; the plane of one circumferential end face of the curved guide plate coincides with the central axis of the intermediate tube, and the other end face is a second inclined surface; the second inclined surface is limited and abutted by the first inclined surface.

[0010] Furthermore, when the self-cleaning mechanism is in the cleaning state, the rotating tube rotates; during the rotation, under the limit of the first inclined surface, the return spring is first compressed and then reset in a cycle. At this time, the curved guide plate first enters between two adjacent arc blocks and then resets in a cycle.

[0011] Furthermore, a connecting pipe is fixedly connected to one end of the rotating pipe near the large-diameter end of the middle pipe body. The connecting pipe extends into the interior of the air inlet and has a bevel gear ring fixedly provided at its end. A drive motor is fixedly installed inside the bag filter, and a bevel gear is fixedly provided at the output end of the drive motor. The bevel gear meshes with the bevel gear ring.

[0012] Furthermore, the sealing plate has a through hole, and the drive motor is fixedly installed on the top of the sealing plate and its output end extends into the bottom of the sealing plate through the through hole.

[0013] Furthermore, an air outlet pipe is fixedly connected to the air outlet of the bag filter, and the air outlet is located above the sealing plate.

[0014] Furthermore, the top of the bag filter is fixedly equipped with a detachable top cover; the bottom of the bag filter is fixedly connected to the ash discharge pipe through a frustum-shaped guide tube.

[0015] A method for treating fly ash from hazardous waste incineration using the aforementioned fly ash filtration and separation device includes the following steps: S1. During normal filtration and separation, the second inclined surface is limited and abutted by the first inclined surface. Multiple curved scraper blades and curved guide plates form a guide structure with an ever-increasing opening, which effectively guides the fly ash at the end of the pipe while reducing the wind force; it prevents fly ash from accumulating at the end, improves the gravity settling effect of fly ash, and effectively protects the filter bag. S2. Periodically control the rotation of the rotating tube. Under the limit of the first inclined surface, the return spring is first compressed and then reset in a cycle. At this time, the curved guide plate first enters between two adjacent arc blocks and then resets in a cycle. During this process, the curved scraper blade and the curved guide plate first move in a cross-fitting motion. The curved scraper blade first scrapes off the fly ash accumulated on the surface of the curved guide plate. Then, under the reset of the return spring, the curved guide plate is instantaneously reset and impacts the first inclined surface through the second inclined surface, shaking off the fly ash accumulated on the surface of the curved guide plate. This cycle repeats and the fly ash accumulated on the inner wall of the pipe end is automatically cleaned by its own wind power. At the same time, during this process, the arc blocks, curved scraper blade, and curved guide plate always maintain a closed guiding space, so there will be no fly ash residue. Moreover, it will not affect the filtration process.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) This invention, through the cooperation of the rotating tube and the self-cleaning mechanism, can not only automatically clean the fly ash accumulated at the end of the pipe without stopping the machine, but also does not affect the filtration effect. Specifically, since the length of the general air inlet pipe is relatively long, wind power loss will occur during the air guiding process of the external fan. The wind power of the pipe near the air inlet is weaker, so the end of the pipe is prone to dust accumulation. At this time, the rotating tube is periodically controlled by the external power equipment. Under the limit of the first inclined surface, the return spring is first compressed and then reset in a cycle. At this time, the curved guide plate first enters between two adjacent arc blocks and then resets in a cycle. In this process, the curved scraper blade and the curved guide plate first cross and fit together. The curved scraper blade first scrapes off the fly ash accumulated on the surface of the curved guide plate. Then, under the reset of the return spring, the curved guide plate is instantaneously reset and hits the first inclined surface through the second inclined surface, shaking off the fly ash accumulated on the surface of the curved guide plate. This cycle can also form a vibration effect, utilizing The frustum-shaped guide structure inside the intermediate tube automatically draws accumulated fly ash into the bag filter via its own airflow, achieving automatic cleaning of fly ash accumulated on the inner wall of the pipe end. Conventional cleaning requires increased airflow, which is energy-intensive and reduces the gravity settling effect of fly ash within the bag filter, while also increasing the impact on the filter bags and the risk of damage. This invention's self-cleaning mechanism not only cleans automatically without stopping the machine, but also retracts and repositions the curved guide plate during automatic cleaning. Under the constraint of the first inclined surface, the diameter of the guide structure formed by the curved scraper blade and the curved guide plate only changes slightly, without affecting the airflow inside the intermediate tube or increasing the airflow at the port. This avoids changes in airflow caused by cleaning, which could ultimately affect the gravity settling effect of fly ash and reduce the risk of filter bag damage, thus maintaining the overall filtration effect.

[0017] (2) The present invention, through the cooperation of the intermediate tube and the self-cleaning mechanism, can clean the fly ash thoroughly without leaving any residue, and can further improve the filtration effect of fly ash. Specifically, during normal filtration, multiple curved scraper blades and curved guide plates will form a guide structure with an ever-increasing opening. Since the airflow of the inlet pipe is fixed, the diameter of the opening will continuously increase when passing through the frustum-shaped guide space, thereby effectively guiding the fly ash at the end of the pipe and reducing the airflow. This will prevent fly ash from accumulating at the end and improve the gravity settling effect of fly ash, and effectively protect the filter bag, thus further improving the filtration effect of fly ash. At the same time, during the cleaning process, the movement of the arc block, curved scraper blades and curved guide plates will always maintain the closed guide space, so that the fly ash will eventually flow into the bag filter without any fly ash remaining in the corner, thus cleaning the fly ash thoroughly without leaving any residue. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the overall structure of a fly ash filtration and separation treatment device for hazardous waste incineration according to the present invention. Figure 2 This is a schematic diagram of the dispersion structure of a fly ash filtration and separation treatment device for hazardous waste incineration according to the present invention; Figure 3 This is a partial dispersion structure schematic diagram of a fly ash filtration and separation treatment device for hazardous waste incineration according to the present invention. Figure 4 This is a schematic diagram of the internal structure of the rotating tube and self-cleaning mechanism of a fly ash filtration and separation treatment device for hazardous waste incineration according to the present invention. Figure 5 This is a schematic diagram of the intermediate tube structure of a fly ash filtration and separation treatment device for hazardous waste incineration according to the present invention; Figure 6 This is a schematic diagram of the rotating tube structure of a fly ash filtration and separation treatment device for hazardous waste incineration according to the present invention; Figure 7 This is a schematic diagram of the self-cleaning mechanism of a fly ash filtration and separation treatment device for hazardous waste incineration according to the present invention. Figure 8 This is a partial cross-sectional schematic diagram of a fly ash filtration and separation treatment device for hazardous waste incineration according to the present invention.

[0019] The attached figures are labeled as follows: Baghouse dust collector-100, frustum-shaped guide tube-110, ash discharge tube-120, air inlet-130 and air outlet-130, detachable top cover-150, air inlet pipe-200, air outlet pipe-300, intermediate tube body-400, connecting ring-401, curved scraper blade-410, first inclined surface-411, sealing plate-500, vent hole-510, through hole-520, filter bag-530, drive motor-600, bevel gear-610, connecting pipe-700, bevel tooth ring-710, rotating tube-800, arc block-810, connecting block-820, sliding hole-821, self-cleaning mechanism-900, curved guide plate-910, second inclined surface-911, sliding rod-920, limit block-930, return spring-940. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] Although the steps in this invention are arranged by reference numerals, this is not intended to limit the order of the steps. Unless the order of the steps is explicitly stated or the execution of a step requires other steps as a basis, the relative order of the steps can be adjusted. It is understood that the term "and / or" as used herein refers to and covers any and all possible combinations of one or more of the associated listed items.

[0022] Example like Figures 1-8 As shown, a fly ash filtration and separation treatment device for hazardous waste incineration includes a bag filter 100 and an intermediate tube 400. The intermediate tube 400 has a hollow frustum structure. The large-diameter end of the intermediate tube 400 is fixedly connected to the air inlet 130, and the small-diameter end of the intermediate tube 400 is fixedly provided with a connecting ring 401. The inner diameter end of the connecting ring 401 is fixedly connected to the air inlet pipe 200. The bag filter 100 has a sealing plate 500 fixedly installed inside, and the sealing plate 500 has multiple ventilation holes 510 through it. The ventilation holes 510 are fixedly connected to the filter bag 530. The air inlet 130 is opposite to the side wall of the filter bag 530. A rotating pipe 800 is installed on the inner wall of the intermediate pipe body 400. Multiple sets of self-cleaning mechanisms 900 are installed on the rotating pipe 800. The self-cleaning mechanisms 900 and the intermediate pipe body 400 together form an air guide surface.

[0023] This invention, through the cooperation of the rotating tube 800 and the self-cleaning mechanism 900, can not only automatically clean the fly ash accumulated at the end of the pipe without stopping the machine, but also does not affect the filtration effect; a detailed description will follow.

[0024] Furthermore, the inner diameter end of the connecting ring 401 is uniformly and circumferentially fixedly connected with a plurality of curved scraper blades 410, and the central axis of the plurality of curved scraper blades 410 is coaxially arranged with the intermediate tube body 400; the plane of one circumferential end face of the curved scraper blade 410 coincides with the central axis, and the other end face is the first inclined surface 411.

[0025] It is worth noting that the scraper blade is made of smooth metal material; any conventional material can be selected, and will not be described in detail here.

[0026] Furthermore, the rotating tube 800 includes multiple arc blocks 810, and the circumferential end faces of adjacent arc blocks 810 are fixedly connected by connecting blocks 820; the two arc surfaces of the arc blocks 810 are respectively in contact with the inner wall of the intermediate tube body 400 and the curved scraper blade 410; multiple sliding holes 821 are evenly penetrated on the connecting block 820, and the sliding holes 821 are slidably connected to the self-cleaning mechanism 900.

[0027] Furthermore, the self-cleaning mechanism 900 includes a curved guide plate 910, on which a plurality of sliding rods 920 are fixedly connected, and the sliding rods 920 are slidably connected to the sliding holes 821; a limiting block 930 is fixedly provided at the end of the sliding rod 920, and a return spring 940 is sleeved on the sliding rod 920, with both ends of the return spring 940 being fixedly connected to the limiting block 930 and the connecting block 820, respectively; the plane of one circumferential end face of the curved guide plate 910 coincides with the central axis of the intermediate tube 400, and the other end face is a second inclined surface 911; the second inclined surface 911 is limited and abutted by the first inclined surface 411.

[0028] Because the intake pipe 200 is generally quite long, airflow loss occurs during the airflow process guided by the external fan, resulting in weaker airflow near the intake port 130. Therefore, dust easily accumulates at the pipe ends. To address this, the rotating pipe 800 is periodically controlled by an external power device. Under the limitation of the first inclined surface 411, the return spring 940 is first compressed and then reset in a cycle. At this time, the curved guide plate 910 first enters between two adjacent arc blocks 810 and then resets in a cycle. During this process, the curved scraper blade 410 and the curved guide plate 910 first move in a cross-attached motion. The curved scraper blade 410 first scrapes away the fly ash accumulated on the surface of the curved guide plate 910. Then, under the reset of the return spring 940, the curved guide plate 910 momentarily resets and impacts the first inclined surface 411 through the second inclined surface 911, shaking off the fly ash accumulated on the surface of the curved guide plate 910. This cycle also creates a vibration effect, utilizing the frustum-shaped guide structure inside the intermediate pipe 400 and its own... The accumulated fly ash will automatically flow into the bag filter 100 through the middle pipe 400, achieving automatic cleaning of the fly ash accumulated on the inner wall of the pipe end. At the same time, conventional cleaning requires increased airflow, which not only consumes more energy, but also reduces the gravity settling effect of fly ash inside the bag filter 100 and causes greater impact on the filter bag 530, increasing the risk of damage to the filter bag 530. However, the self-cleaning mechanism 900 of this invention can automatically clean without stopping the machine. During automatic cleaning, the curved guide plate 910 retracts and then returns to its original position. Under the limitation of the first inclined surface 411, the diameter of the guide structure formed by the curved scraper blade 410 and the curved guide plate 910 will only change slightly, without affecting the airflow inside the middle pipe 400 or increasing the airflow at the port. This avoids the change in airflow caused by cleaning, which ultimately affects the gravity settling effect of fly ash and reduces the risk of damage to the filter bag 530, thus ensuring that the overall filtration effect is not affected.

[0029] Furthermore, when the self-cleaning mechanism 900 is in the cleaning state, the rotating tube 800 rotates; during the rotation, under the limit of the first inclined surface 411, the return spring 940 is first compressed and then reset in a cycle. At this time, the curved guide plate 910 first enters between two adjacent arc blocks 810 and then resets in a cycle.

[0030] This invention, through the cooperation of the intermediate tube 400 and the self-cleaning mechanism 900, not only cleans fly ash thoroughly without residue, but also further improves the fly ash filtration effect. Specifically, during normal filtration, multiple curved scraper blades 410 and curved guide plates 910 form a guiding structure with an ever-increasing opening. Since the airflow of the inlet pipe 200 is fixed, the diameter of the opening continuously increases as it passes through the frustum-shaped guiding space, effectively guiding the fly ash at the end of the pipe while reducing the airflow. This prevents fly ash from accumulating at the end and improves the gravity settling effect of the fly ash, effectively protecting the filter bag 530, thus further improving the fly ash filtration effect. At the same time, during the cleaning process, the movement of the arc block 810, curved scraper blades 410, and curved guide plates 910 always maintains a closed guiding space, so that the fly ash is ultimately all guided into the bag filter 100, without any fly ash remaining in the corners, ensuring that the fly ash is cleaned thoroughly without residue.

[0031] Furthermore, a connecting pipe 700 is fixedly connected to one end of the rotating pipe 800 near the large-diameter end of the intermediate pipe body 400. The connecting pipe 700 extends into the interior of the air inlet 130 and has a bevel gear ring 710 fixedly provided at its end. A drive motor 600 is fixedly installed inside the bag filter 100, and a bevel gear 610 is fixedly provided at the output end of the drive motor 600. The bevel gear 610 meshes with the bevel gear ring 710.

[0032] The present invention drives the rotating tube 800 to rotate by controlling the drive motor 600 and utilizing the meshing of the bevel gear 610 and the bevel gear ring 710. The drive motor 600 is powered by an external power source, which is a conventional setting and will not be described in detail here.

[0033] Furthermore, the sealing plate 500 has a through hole 520, and the drive motor 600 is fixedly installed on the top of the sealing plate 500 and its output end extends into the bottom of the sealing plate 500 through the through hole 520.

[0034] This structural design effectively protects the drive motor 600 from fly ash and facilitates maintenance.

[0035] Furthermore, an air outlet 140 located in the bag filter 100 is fixedly connected to an air outlet pipe 300, and the air outlet 140 is located above the sealing plate 500.

[0036] It is worth noting that both the air inlet pipe 200 and the air outlet pipe 300 of this invention are connected to external equipment, such as a secondary flue gas treatment device or an incinerator. Since these are not the focus of this invention, they will not be described in detail here.

[0037] Furthermore, the top of the bag filter 100 is fixedly provided with a detachable top cover 150; the bottom of the bag filter 100 is fixedly connected to an ash discharge pipe 120 through a frustum-shaped guide pipe 110. The ash discharge pipe 120 is externally connected to a fly ash storage device for collection.

[0038] A method for treating fly ash from hazardous waste incineration using the aforementioned fly ash filtration and separation device includes the following steps: S1. During normal filtration and separation, the second inclined surface 911 is limited and abutted by the first inclined surface 411. Multiple curved scraper blades 410 and curved guide plates 910 form a guide structure with an ever-increasing opening, thereby effectively guiding the fly ash at the end of the pipe while reducing the wind force; preventing fly ash from accumulating at the end while improving the gravity settling effect of fly ash, and effectively protecting the filter bag 530. S2. Periodically control the rotation of the rotating tube 800. Under the limit of the first inclined surface 411, the return spring 940 is first compressed and then reset in a cycle. At this time, the curved guide plate 910 first enters between two adjacent arc blocks 810 and then resets in a cycle. During this process, the curved scraper blade 410 and the curved guide plate 910 first move in a cross-fitting motion. The curved scraper blade 410 first scrapes off the fly ash accumulated on the surface of the curved guide plate 910. Then, under the reset of the return spring 940, the curved guide plate 910 is instantaneously reset and impacts the first inclined surface 411 through the second inclined surface 911, shaking off the fly ash accumulated on the surface of the curved guide plate 910. This cycle is repeated, and the fly ash accumulated on the inner wall of the pipe end is automatically cleaned by its own wind power. At the same time, during this process, the arc block 810, the curved scraper blade 410, and the curved guide plate 910 always maintain a closed guiding space, so there will be no fly ash residue. Moreover, it will not affect the filtration process.

[0039] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A fly ash filtration and separation treatment device for hazardous waste incineration, characterized in that, It includes a bag filter (100) and an intermediate tube (400), wherein the intermediate tube (400) is a hollow frustum structure; the large-diameter end of the intermediate tube (400) is fixedly connected to the air inlet (130), and the small-diameter end of the intermediate tube (400) is fixedly provided with a connecting ring (401), wherein the inner diameter end of the connecting ring (401) is fixedly connected to the air inlet pipe (200); The bag filter (100) has a sealing plate (500) fixedly installed inside. The sealing plate (500) has multiple ventilation holes (510) through it. The ventilation holes (510) are fixedly connected to the filter bag (530). The air inlet (130) is opposite to the side wall of the filter bag (530). The inner wall of the intermediate tube (400) is equipped with a rotating tube (800), and multiple sets of self-cleaning mechanisms (900) are installed on the rotating tube (800). The self-cleaning mechanisms (900) and the intermediate tube (400) together form an air guide surface.

2. The fly ash filtration and separation treatment device for hazardous waste incineration according to claim 1, characterized in that, The inner diameter end of the connecting ring (401) is uniformly and circumferentially fixedly connected with multiple curved scraper blades (410), and the central axis of the multiple curved scraper blades (410) is coaxially arranged with the intermediate tube body (400); the plane of one end face of the curved scraper blade (410) coincides with the central axis, and the other end face is the first inclined surface (411).

3. The fly ash filtration and separation treatment device for hazardous waste incineration according to claim 2, characterized in that, The rotating tube (800) includes multiple arc blocks (810), and the circumferential end faces of adjacent arc blocks (810) are fixedly connected by connecting blocks (820); the two arc surfaces of the arc blocks (810) are respectively in contact with the inner wall of the intermediate tube body (400) and the curved scraper blade (410); multiple sliding holes (821) are uniformly penetrating the connecting block (820), and the sliding holes (821) are slidably connected to the self-cleaning mechanism (900).

4. The fly ash filtration and separation treatment device for hazardous waste incineration according to claim 3, characterized in that, The self-cleaning mechanism (900) includes a curved guide plate (910), on which a plurality of sliding rods (920) are fixedly connected. The sliding rods (920) are slidably connected to the sliding holes (821). A limiting block (930) is fixedly provided at the end of the sliding rod (920), and a return spring (940) is sleeved on the sliding rod (920). The two ends of the return spring (940) are fixedly connected to the limiting block (930) and the connecting block (820) respectively. The plane of one circumferential end face of the curved guide plate (910) coincides with the central axis of the intermediate tube (400), and the other end face is a second inclined surface (911). The second inclined surface (911) is limited and abutted by the first inclined surface (411).

5. The fly ash filtration and separation treatment device for hazardous waste incineration according to claim 4, characterized in that, When the self-cleaning mechanism (900) is in the cleaning state, the rotating tube (800) rotates; during the rotation, under the limit of the first inclined surface (411), the return spring (940) is first compressed and then reset in a cycle. At this time, the curved guide plate (910) first enters between two adjacent arc blocks (810) and then resets in a cycle.

6. The fly ash filtration and separation treatment device for hazardous waste incineration according to claim 5, characterized in that, A connecting pipe (700) is fixedly connected to one end of a rotating pipe (800) near the large-diameter end of the intermediate pipe body (400). The connecting pipe (700) extends into the interior of the air inlet (130) and is fixedly provided with a bevel gear ring (710) at its end. A drive motor (600) is fixedly installed inside the bag filter (100). A bevel gear (610) is fixedly provided at the output end of the drive motor (600). The bevel gear (610) meshes with the bevel gear ring (710).

7. The fly ash filtration and separation treatment device for hazardous waste incineration according to claim 6, characterized in that, The sealing plate (500) has a through hole (520), and the drive motor (600) is fixedly installed on the top of the sealing plate (500) and its output end extends into the bottom of the sealing plate (500) through the through hole (520).

8. The fly ash filtration and separation treatment device for hazardous waste incineration according to claim 1, characterized in that, An air outlet (140) of the bag filter (100) is fixedly connected to an air outlet pipe (300), and the air outlet (140) is located above the sealing plate (500).

9. The fly ash filtration and separation treatment device for hazardous waste incineration according to claim 1, characterized in that, The top of the bag filter (100) is fixedly provided with a detachable top cover (150); the bottom of the bag filter (100) is fixedly connected to the ash discharge pipe (120) through a frustum-shaped guide pipe (110).

10. A method for treating fly ash from hazardous waste incineration using the fly ash filtration and separation treatment device according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1. During normal filtration and separation, the second inclined surface (911) is limited and abutted by the first inclined surface (411), and multiple curved scraper blades (410) and curved guide plates (910) form a guide structure with an ever-increasing opening, thereby effectively guiding the fly ash at the end of the pipe while reducing the wind force. It can prevent fly ash from accumulating at the end while improving the gravity settling effect of fly ash and effectively protect the filter bag (530); S2. Periodically control the rotation of the rotating tube (800). Under the limit of the first inclined surface (411), the return spring (940) is first compressed and then reset in a cycle. At this time, the curved guide plate (910) first enters between two adjacent arc blocks (810) and then resets in a cycle. During this process, the curved scraper blade (410) and the curved guide plate (910) first move in a cross-fitting motion. The curved scraper blade (410) first scrapes off the fly ash accumulated on the surface of the curved guide plate (910), and then the return spring (940) is reset in a cycle. Under the reset of 40), the curved guide plate (910) is instantaneously reset and impacts the first inclined surface (411) through the second inclined surface (911), shaking off the fly ash accumulated on the surface of the curved guide plate (910); this cycle is repeated and the fly ash accumulated on the inner wall of the pipe end is automatically cleaned by its own wind power; at the same time, during this process, the arc block (810), the curved scraper blade (410), and the curved guide plate (910) always maintain a closed guiding space, so there will be no fly ash residue; and it will not affect the filtration process.

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