Thermal insulation structure applied to over-temperature transformation of inlet flue of carbon black tail gas boiler

Abstract

The invention discloses a thermal insulation structure applied to carbon black tail gas boiler inlet flue overtemperature transformation, which comprises a plurality of groups of smoke inlet assemblies and a plurality of groups of thermal insulation assemblies, the smoke inlet assemblies and the thermal insulation assemblies are arranged in a staggered manner, each group of smoke inlet assembly comprises a smoke inlet pipe and two smoke exhaust pipes, the smoke inlet assemblies are used for conveying boiler tail gas into the thermal insulation assemblies, and the smoke exhaust pipes are used for discharging the boiler tail gas. The two smoke exhaust pipes communicate with the interior of the smoke inlet pipe and are symmetrically distributed along the center line of the smoke inlet pipe. Solid particles in flue gas can be intercepted in the annular groove, a heat preservation layer is arranged on the periphery of the heat preservation pipe, meanwhile, the separation mechanism continuously rotates, the solid particles near the filter holes can be scraped off, the situation that the solid particles near the filter holes are accumulated to block the filter holes can be avoided, and therefore the heat preservation effect can be improved without disassembly and cleaning; the boiler tail gas treatment efficiency is effectively ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of boiler flue gas insulation, and particularly to a thermal insulation structure applied to the over-temperature transformation of the inlet flue of a carbon black tail gas boiler. Background Art

[0002] In the process of carbon black production, as an important heat energy recovery device, the temperature control of the inlet flue of the tail gas boiler is directly related to the heat energy utilization efficiency. Under the current technical background, in order to efficiently utilize the waste heat resources of the flue gas in the exhaust pipe, the thermal insulation measures for the flue gas during transmission are particularly important.

[0003] Meanwhile, during the transportation of boiler flue gas, it is often necessary to purify the flue gas. For example, it is necessary to remove the flue gas particulate matter in the flue gas. Since the flue gas particulate matter itself also has a certain amount of heat, heat loss will occur during filtration, thereby reducing the waste heat utilization efficiency. For this reason, Chinese Patent Publication No. "CN117803942A" proposes a thermal insulation structure and method for the exhaust flue of a coke dry quenching waste heat boiler. In this patent document, the thermal insulation auxiliary component and the auxiliary structure are used in cooperation to filter the solid particles in the flue gas, and the solid particles staying during filtration form a temporary thermal insulation layer for thermal insulation. Although this thermal insulation layer formed by solid particulate matter can reduce heat loss, it will gradually block the filter holes as the flue gas continues to be transported. Therefore, it needs to be disassembled and cleaned every once in a while, which greatly affects the treatment efficiency of boiler tail gas. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to propose a thermal insulation structure applied to the over-temperature transformation of the inlet flue of a carbon black tail gas boiler.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions: A thermal insulation structure applied to the over-temperature transformation of the inlet flue of a carbon black tail gas boiler includes multiple groups of flue gas inlet components and multiple groups of thermal insulation components, and the flue gas inlet components and the thermal insulation components are arranged alternately. Each group of the flue gas inlet components includes a flue gas inlet pipe and two exhaust pipes, and the flue gas inlet components are used to transport the boiler tail gas into the thermal insulation components; The thermal insulation components include a thermal insulation pipe and a separation mechanism. The thermal insulation components are used to maintain the temperature of the boiler tail gas. An annular groove is formed in the thermal insulation pipe, and a plurality of filter holes communicating with the inside of the annular groove are formed on the inner wall of the thermal insulation pipe. The separation mechanism is composed of a plurality of separation plates, a plurality of radial connecting rods, and a plurality of axial connecting rods, and the separation mechanism is used to clean the flue gas particulate matter on the inner wall of the annular groove; The separation mechanism is rotated by a driving mechanism.

[0006] Preferably, two radially adjacent separation plates are fixedly connected by a radial connecting rod, and two axially adjacent separation plates are fixedly connected by an axial connecting rod, the separation plates are slidably arranged on the inner wall of the annular groove, and the smoke outlet end of the smoke exhaust pipe is arranged in the annular groove.

[0007] Preferably, a conical hole is opened on the separation plate, wherein the side of the conical hole with a smaller aperture is arranged toward the filter hole, and the side of the conical hole with a larger aperture is arranged away from the filter hole.

[0008] Preferably, the pushing mechanism comprises a plurality of blades and a pneumatic mechanism, each of the blades is fixedly connected to the side wall of an adjacent separation plate, and the pneumatic mechanism is used to blow airflow toward the blades; The pneumatic mechanism includes an air tank, an air plug, a first spring and an exhaust pipe. The air plug is sealingly and slidably arranged in the air tank. The air plug is connected to the inner wall of the air tank through the first spring. The air inlet end of the exhaust pipe is communicated with the air tank, the air outlet end of the exhaust pipe is communicated with the inside of the annular groove, and the air outlet end of the exhaust pipe is opposite to the blade. A pressure relief valve is installed in the exhaust pipe.

[0009] Preferably, the insulation pipe is equipped with an air delivery mechanism for delivering air to the air storage tank, and the air delivery mechanism includes an air pump cylinder, an air pump plate and a second spring. The upper end of the air pump cylinder is also connected to a one-way air inlet pipe and a one-way air outlet pipe, and the one-way air outlet pipe is connected to the air storage tank. The air pump plate is sealingly and slidably connected in the air pump cylinder, and the air pump plate is connected to the bottom of the air pump cylinder through a second spring.

[0010] Preferably, pulse valves are installed in both smoke exhaust pipes, a push rod is fixedly connected to the lower end of the pump plate, a wind shield is fixedly connected to the lower end of the push rod, and the wind shield is arranged on one side of the smoke outlet end of the smoke exhaust pipe.

[0011] Preferably, a guide ring groove is opened on the inner wall of the insulation tube, and a plurality of rollers are rolled in the guide ring groove. A support rod is rotatably connected to the side wall of the roller, and one end of the support rod away from the roller is fixedly connected to the side wall of the adjacent radial connecting rod.

[0012] Preferably, a discharge channel is welded on the side wall of the insulation pipe, the discharge channel is communicated with the annular groove, a collection trough is slidably provided on the outer wall of the discharge channel, and the collection trough is fixedly connected to the discharge channel by a locking bolt, and a scraper is welded and fixed on the side wall of the radial connecting rod.

[0013] Preferably, the pore size of the filter holes on the inner wall of each group of thermal insulation pipes increases gradually from left to right.

[0014] Preferably, the two smoke exhaust pipes are both connected to the interior of the smoke inlet pipe, and the two smoke exhaust pipes are symmetrically distributed along the center line of the smoke inlet pipe.

[0015] The present invention has the following beneficial effects: 1. By providing an annular groove with filter holes and a separation mechanism, when the boiler tail gas is input into the heat preservation pipe through the smoke inlet pipe, it will enter the annular groove. In this way, the solid particles in the flue gas can be intercepted in the annular groove and a heat preservation layer can be formed around the heat preservation pipe. At the same time, the separation mechanism rotates continuously, which can scrape off the solid particles near the filter holes and avoid the accumulation of solid particles near the filter holes causing the blockage of the filter holes. In this way, there is no need to disassemble and clean, and the heat preservation effect can be improved, effectively ensuring the treatment efficiency of the boiler tail gas; 2. By providing a separation plate with tapered holes, when the separation mechanism rotates, it can drive the separation plate to slide along the inner wall of the annular groove. Some solid particles will enter the tapered holes and be thrown towards the outer inner wall of the annular groove under the action of centrifugal force as the separation plate rotates. In this way, the solid particles can be more widely and evenly distributed in the annular groove, thereby improving the heat preservation range and heat preservation effect of the heat preservation pipe. At the same time, it can also further reduce the solid particles near the filter holes and ensure the air permeability of the filter holes; 3. By providing a pneumatic mechanism, the kinetic energy during the transportation of the flue gas can be used to drive the rotation of the separation mechanism. At the same time, an air transportation mechanism is adopted to continuously transport air to the gas storage tank, and only when the air pressure in the gas storage tank reaches the set value of the pressure relief valve in the exhaust pipe will the air flow be ejected. In this way, it can not only ensure that the ejected air flow has enough power to make the separation mechanism rotate, but also achieve the effect of cleaning the solid particles near the filter holes every once in a while; 4. By providing a scraper, a discharge channel and an aggregate tank, when the separation mechanism rotates, it can drive the scraper to rotate synchronously. In this way, the solid particles in the annular groove can be scraped flat, so that the solid particles are evenly spread and distributed around the outer inner wall of the annular groove, improving its heat preservation performance. At the same time, when the solid particle layer formed in the annular groove exceeds a certain thickness, it can be scraped off by the scraper and fall into the aggregate tank through the discharge channel. In this way, the device can automatically clean the excess solid particles. Description of the Drawings

[0016] Figure 1 is a schematic external side structure diagram of a heat preservation structure applied to the over-temperature transformation of the inlet flue of a carbon black tail gas boiler proposed by the present invention; Figure 2 is a schematic front structure diagram of a heat preservation structure applied to the over-temperature transformation of the inlet flue of a carbon black tail gas boiler proposed by the present invention; Figure 3 is a schematic internal sectional structure diagram of the heat preservation component and the smoke inlet component in the present invention; Figure 4 is a schematic structure diagram of the separation mechanism in the invention; Figure 5 is Figure 3 an enlarged schematic diagram of the structure at A in Figure 6 isFigure 3 Schematic enlarged view of the structure at position B in Figure 7 Internal structure schematic diagram of the gas transmission mechanism in the present invention; Figure 8 Internal structure schematic diagram of the pneumatic mechanism in the present invention; Figure 9 Cross-sectional schematic diagram of the connection between the heat preservation pipe, the discharge channel and the aggregate tank in the present invention.

[0017] In the figure: 1 smoke inlet pipe, 2 heat preservation pipe, 3 gas storage tank, 4 air pumping cylinder, 5 one-way air inlet pipe, 6 one-way air outlet pipe, 7 exhaust pipe, 8 aggregate tank, 9 discharge channel, 10 locking bolt, 11 filter hole, 12 axial connecting rod, 13 separation plate, 14 tapered hole, 15 first spring, 16 wind baffle, 17 push rod, 18 blade, 19 support rod, 20 guide ring groove, 21 roller, 22 scraper, 23 radial connecting rod, 25 annular groove, 26 air pumping plate, 27 second spring, 28 smoke exhaust pipe, 29 air plug. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Embodiment 1:

[0019] Refer to Figures 1-4 , a heat preservation structure applied to the over-temperature transformation of the inlet flue of a carbon black tail gas boiler, including multiple groups of smoke inlet components and multiple groups of heat preservation components, and the smoke inlet components and the heat preservation components are arranged alternately. Each group of smoke inlet components includes a smoke inlet pipe 1 and two smoke exhaust pipes 28. The smoke inlet components are used to transport the boiler tail gas into the heat preservation components. Both of the two smoke exhaust pipes 28 are internally communicated with the smoke inlet pipe 1, and the two smoke exhaust pipes 28 are symmetrically distributed along the center line of the smoke inlet pipe 1; The heat preservation components include a heat preservation pipe 2 and a separation mechanism. The heat preservation components are used to maintain the temperature of the boiler tail gas. An annular groove 25 is opened in the heat preservation pipe 2, and a plurality of filter holes 11 internally communicated with the annular groove 25 are opened on the inner wall of the heat preservation pipe 2. The separation mechanism is composed of a plurality of separation plates 13, a plurality of radial connecting rods 23, and a plurality of axial connecting rods 12. The separation mechanism is used to clean the flue gas particles on the inner wall of the annular groove 25. Among them, two radially adjacent separation plates 13 are fixedly connected by a radial connecting rod 23, and two axially adjacent separation plates 13 are fixedly connected by an axial connecting rod 12. The separation plates 13 are slidably arranged on the inner wall of the annular groove 25, and the smoke outlet ends of the smoke exhaust pipes 28 are arranged in the annular groove 25. The separation mechanism is rotated by a pushing mechanism.

[0020] Refer to Figure 3, in this embodiment, after the boiler tail gas is input from the right-side smoke inlet pipe 1, since the left end of the smoke inlet pipe 1 is closed, the tail gas can only enter the annular groove 25 in the heat preservation pipe 2 along the upper and lower smoke exhaust pipes 28. Subsequently, after the solid particulate matter is filtered out through each filter hole 11, the tail gas will enter the heat preservation pipe 2 and flow into the left-side smoke inlet pipe 1, and then enter the annular groove 25 in the next heat preservation pipe 2. In this way, the solid particulate matter in the flue gas can be intercepted in the annular groove 25, and a heat preservation layer can be formed around the heat preservation pipe 2 by the solid particulate matter with waste heat, which can reduce the heat loss of the flue gas during the transportation process.

[0021] In addition, when the pushing mechanism pushes the separating mechanism to rotate, the separating plate 13 arranged in the annular groove 25 will continuously rotate around the central axis of the heat preservation pipe 2. At this time, the separating plate 13 can continuously scrape off the solid particulate matter near the filter holes 11, which can prevent the accumulation of solid particulate matter near the filter holes 11 and cause blockage of the filter holes 11. In this way, there is no need to disassemble and clean, and the heat preservation effect can be improved, effectively ensuring the treatment efficiency of the boiler tail gas. Embodiment Two:

[0022] Refer to Figure 5 , compared with Embodiment One, a tapered hole 14 is provided on the separating plate 13 in this embodiment. The smaller-diameter side of the tapered hole 14 faces the filter hole 11, and the larger-diameter side of the tapered hole 14 is away from the filter hole 11. Specifically, there is a certain gap between the side of the separating plate 13 close to the filter hole 11 and the inner wall of the annular groove 25. In this way, when a certain amount of solid particulate matter accumulates near the filter hole 11 in the annular groove 25, it can be scraped off by the separating plate 13. At the same time, due to the existence of this gap, some solid particulate matter can also enter the tapered hole 14 inside the separating plate 13.

[0023] In this embodiment, when the separating plate 13 moves along the inner wall of the annular groove 25, after some solid particulate matter enters the tapered hole 14, as the separating plate 13 rotates around the central axis of the heat preservation pipe 2, under the action of centrifugal force, the solid particulate matter can be thrown towards the outer inner wall of the annular groove 25 (that is, the inner wall on the side away from the filter hole 11), as Figure 5 shown. Since the upper side diameter of the tapered hole 14 is larger, the thrown solid particulate matter can be scattered over a wider range on the outer inner wall of the annular groove 25, and at the same time, it can also make the solid particulate matter more evenly distributed on the outer inner wall of the annular groove 25, thereby improving the heat preservation range and heat preservation effect of the heat preservation pipe 2, and at the same time, it can further reduce the solid particulate matter near the filter holes 11 and ensure the air permeability of the filter holes 11. Embodiment Three:

[0024] The aperture of the filter holes 11 on the inner wall of each group of heat preservation pipes 2 gradually increases from left to right.

[0025] In this embodiment, refer to Figure 1, the filter hole 11 of the right insulation tube 2 has a larger aperture, and the filter hole 11 of the left insulation tube 2 has a smaller aperture. When the smoke is filtered by the filter hole 11 in the right insulation tube 2, larger solid particles will be trapped in the annular groove 25 in the right insulation tube 2, while smaller solid particles can enter the annular groove 25 in the left insulation tube 2 and be trapped in the annular groove 25 by the filter hole 11 in the left insulation tube 2 again. Then, smaller solid particles will pass through the filter hole 11 and enter the annular groove 25 in the next insulation tube 2... Such a design not only ensures that the annular groove 25 in each insulation pipe 2 is provided with solid particles with residual heat, so that an insulation layer can be formed in the annular groove 25 in each insulation pipe 2 and insulation can be performed, but also the solid particles can be evenly distributed in the entire transmission route, and the flue gas can be continuously and effectively insulated. The solid particles in the annular groove 25 in each insulation pipe 2 will not be too much to cause blockage, nor too little to cause poor insulation effect. Embodiment 4:

[0026] Reference Figures 3-8 In this embodiment, the pushing mechanism has the following features: Reference Figure 4 The pushing mechanism includes a plurality of blades 18 and a pneumatic mechanism, each blade 18 is fixedly connected to the side wall of an adjacent separation plate 13, and the pneumatic mechanism is used to blow airflow toward the blade 18; Reference Figure 3 and Figure 8 The pneumatic mechanism includes an air storage tank 3, an air plug 29, a first spring 15 and an exhaust pipe 7. The air plug 29 is sealingly and slidably arranged in the air storage tank 3. The air plug 29 is connected to the inner wall of the air storage tank 3 through the first spring 15. Specifically, one end of the first spring 15 is fixedly connected to the air plug 29, and the other end of the first spring 15 is fixedly connected to the inner wall of the air storage tank 3.

[0027] The air inlet end of the exhaust pipe 7 is communicated with the air storage tank 3 , the air outlet end of the exhaust pipe 7 is communicated with the inside of the annular groove 25 , and the air outlet end of the exhaust pipe 7 faces the blade 18 . A pressure relief valve is installed in the exhaust pipe 7 .

[0028] Reference Figure 7 A gas delivery mechanism for delivering gas to the gas storage tank 3 is installed on the insulation pipe 2, and the gas delivery mechanism includes a pump cylinder 4, a pump plate 26 and a second spring 27. The upper end of the pump cylinder 4 is also connected with a one-way air inlet pipe 5 and a one-way air outlet pipe 6. The one-way air inlet pipe 5 limits the one-way air from flowing into the pump cylinder 4, while the one-way air outlet pipe 6 limits the one-way air from flowing out of the pump cylinder 4. A one-way valve in the corresponding direction can be installed in the pipeline to realize the one-way flow limiting function.

[0029] Moreover, the one-way air outlet pipe 6 communicates with the gas storage tank 3. The air pumping plate 26 is hermetically and slidably connected inside the air pumping cylinder 4, and the air pumping plate 26 is connected to the inner bottom of the air pumping cylinder 4 through the second spring 27. Specifically, one end of the second spring 27 is fixedly connected to the air pumping plate 26, and the other end of the second spring 27 is fixedly connected to the inner bottom of the air pumping cylinder 4.

[0030] Pulse valves are installed in both of the two exhaust pipes 28. The lower end of the air pumping plate 26 is fixedly connected to a push rod 17, and the lower end of the push rod 17 is fixedly connected to a wind shield 16, and the wind shield 16 is arranged on one side of the smoke outlet end of the exhaust pipe 28.

[0031] According to Embodiment 1, when the boiler tail gas is input from the left inlet pipe 1, the pulse valves in the two exhaust pipes 28 are intermittently opened and closed in a pulse form. Then, whenever the pulse valve in a certain exhaust pipe 28 is opened, the boiler tail gas is ejected from this exhaust pipe 28 and blows towards the wind shield 16 to force the wind shield 16 to move. Refer to Figure 7 , when the wind shield 16 moves, it can drive the air pumping plate 26 to move through the push rod 17. When the pulse valve is closed, the exhaust pipe 28 stops exhausting smoke, and the second spring 27 can pull the air pumping plate 26, the push rod 17 and the wind shield 16 back to their original positions. Therefore, as the pulse valve is continuously opened and closed, the wind shield 16, the push rod 17 and the air pumping plate 26 will move reciprocally.

[0032] Along Figure 7 the direction shown, when the air pumping plate 26 moves downward, air can be actively sucked into the air pumping cylinder 4 through the one-way air inlet pipe 5. When the air pumping plate 26 moves upward, the air can be input into the gas storage tank 3 through the one-way air outlet pipe 6 for storage.

[0033] Refer to Figure 8 , as the air pumping plate 26 moves reciprocally continuously, the gas storage tank 3 can be continuously inflated, and the air pressure in the gas storage tank 3 will continuously increase and the air plug 29 will move leftward. When the air pressure in the gas storage tank 3 rises to the set value of the pressure relief valve in the exhaust pipe 7, the pressure relief valve opens, and the high-pressure air in the gas storage tank 3 is discharged at a relatively high flow rate. Refer to Figure 1 、 Figure 2 and Figure 5 , the high-pressure air blows towards the blades 18 through the exhaust pipe 7. In this way, the entire separation mechanism can be driven to rotate by the airflow blowing the blades 18.

[0034] In this way, it can not only ensure that the ejected airflow has sufficient power to rotate the separation mechanism, but also achieve the effect of cleaning the solid particles near the filter holes 11 every once in a while. Embodiment 5:

[0035] Compared with Embodiments 1 to 4, a thermal insulation structure applied to the over-temperature transformation of the inlet flue of a carbon black tail gas boiler in this embodiment further has the following characteristics: Refer to Figure 6, a guiding ring groove 20 is formed on the inner wall of the heat preservation pipe 2, and a plurality of rollers 21 are rotatably arranged in the guiding ring groove 20. A supporting rod 19 is rotatably connected to the side wall of the roller 21, and one end of the supporting rod 19 far away from the roller 21 is fixedly connected to the side wall of the adjacent radial connecting rod 23.

[0036] Refer to Figure 2 and Figure 9 , a discharge channel 9 is welded on the side wall of the heat preservation pipe 2. The discharge channel 9 is communicated with the annular groove 25. An aggregate chute 8 is slidably arranged on the outer wall of the discharge channel 9. It should be noted that the outer wall of the discharge channel 9 is closely attached to the inner wall of the aggregate chute 8, and there is good airtightness between the two.

[0037] And the aggregate chute 8 is fixedly connected to the discharge channel 9 through a locking bolt 10. A scraper 22 is welded and fixed on the side wall of the radial connecting rod 23. By setting the locking bolt 10, the discharge channel 9 and the aggregate chute 8 can be detachably connected. When the device has been used for a quite long time and there are a large number of solid particles in the aggregate chute 8, the aggregate chute 8 can be removed for treatment.

[0038] By setting the guiding ring groove 20, the rollers 21 and the supporting rod 19, when the separating mechanism rotates around the central line of the heat preservation pipe 2, the rollers 21 can move along the guiding ring groove 20, which can make the rotation of the separating mechanism more stable and also appropriately reduce its rotation resistance.

[0039] Furthermore, when the separating mechanism rotates, it will drive the scraper 22 to rotate synchronously. In this way, the solid particles on the outer inner wall of the annular groove 25 can be scraped flat, so that the solid particles are evenly spread around the outer inner wall of the annular groove 25, improving its heat preservation performance. At the same time, when the solid particle layer formed in the annular groove 25 exceeds a certain thickness, the solid particles can be scraped off by the scraper 22 and fall into the aggregate chute 8 through the discharge channel 9. In this way, the device can automatically clean the redundant solid particles.

[0040] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A thermal insulation structure for overheating transformation of the inlet flue of a carbon black tail gas boiler, comprising a plurality of smoke inlet components and a plurality of thermal insulation components, wherein the smoke inlet components and the thermal insulation components are arranged alternately, characterized in that: Each group of the smoke inlet components comprises a smoke inlet pipe (1) and two smoke exhaust pipes (28), and the smoke inlet components are used to transport boiler exhaust gas to the heat preservation component; The heat preservation component comprises a heat preservation pipe (2) and a separation mechanism, the heat preservation component is used to maintain the temperature of boiler exhaust gas, the heat preservation pipe (2) is provided with an annular groove (25), the inner wall of the heat preservation pipe (2) is provided with a plurality of filter holes (11) communicating with the inner wall of the annular groove (25), the separation mechanism is composed of a plurality of separation plates (13), a plurality of radial connecting rods (23), and a plurality of axial connecting rods (12), and the separation mechanism is used to clean flue gas particles on the inner wall of the annular groove (25); The separation mechanism is driven to rotate by the driving mechanism.

2. The thermal insulation structure for over-temperature transformation of the inlet flue of a carbon black tail gas boiler according to claim 1 is characterized in that: Two radially adjacent separation plates (13) are fixedly connected via a radial connecting rod (23), while two axially adjacent separation plates (13) are fixedly connected via an axial connecting rod (12); the separation plates (13) are slidably arranged on the inner wall of the annular groove (25), and the smoke outlet end of the smoke exhaust pipe (28) is arranged in the annular groove (25).

3. The thermal insulation structure for over-temperature transformation of the inlet flue of a carbon black tail gas boiler according to claim 1 is characterized in that: The separation plate (13) is provided with a conical hole (14), wherein the side of the conical hole (14) with a smaller hole diameter is arranged toward the filter hole (11), and the side of the conical hole (14) with a larger hole diameter is arranged away from the filter hole (11).

4. The thermal insulation structure for over-temperature transformation of the inlet flue of a carbon black tail gas boiler according to claim 1 is characterized in that: The pushing mechanism comprises a plurality of blades (18) and a pneumatic mechanism, each of the blades (18) being fixedly connected to a side wall of an adjacent separation plate (13), and the pneumatic mechanism being used to blow airflow toward the blades (18); The pneumatic mechanism comprises an air storage tank (3), an air plug (29), a first spring (15) and an exhaust pipe (7); the air plug (29) is sealingly and slidably arranged in the air storage tank (3); the air plug (29) is connected to the inner wall of the air storage tank (3) via the first spring (15); an air inlet end of the exhaust pipe (7) is in communication with the air storage tank (3); an air outlet end of the exhaust pipe (7) is in communication with the inside of the annular groove (25); the air outlet end of the exhaust pipe (7) faces the blade (18); and a pressure relief valve is installed in the exhaust pipe (7).

5. The thermal insulation structure for over-temperature transformation of the inlet flue of a carbon black tail gas boiler according to claim 4 is characterized in that: The heat preservation pipe (2) is provided with a gas delivery mechanism for delivering gas to the gas storage tank (3), the gas delivery mechanism comprising a pump cylinder (4), a pump plate (26) and a second spring (27); the upper end of the pump cylinder (4) is also connected with a one-way air inlet pipe (5) and a one-way air outlet pipe (6), and the one-way air outlet pipe (6) is connected to the gas storage tank (3); the pump plate (26) is sealingly slidably connected in the pump cylinder (4), and the pump plate (26) is connected to the bottom of the pump cylinder (4) via the second spring (27).

6. The thermal insulation structure for over-temperature transformation of the inlet flue of a carbon black tail gas boiler according to claim 5 is characterized in that: A pulse valve is installed in each of the two smoke exhaust pipes (28); a push rod (17) is fixedly connected to the lower end of the pump plate (26); a wind shield (16) is fixedly connected to the lower end of the push rod (17); and the wind shield (16) is arranged on one side of the smoke outlet end of the smoke exhaust pipe (28).

7. The thermal insulation structure for over-temperature transformation of the inlet flue of a carbon black tail gas boiler according to claim 2 is characterized in that: A guide ring groove (20) is provided on the inner wall of the thermal insulation pipe (2), a plurality of rollers (21) are rotatably arranged in the guide ring groove (20), a support rod (19) is rotatably connected to the side wall of the roller (21), and one end of the support rod (19) away from the roller (21) is fixedly connected to the side wall of an adjacent radial connecting rod (23).

8. The thermal insulation structure for over-temperature transformation of the inlet flue of a carbon black tail gas boiler according to claim 2 is characterized in that: A discharge channel (9) is welded on the side wall of the insulation pipe (2), the discharge channel (9) is communicated with the annular groove (25), a collection groove (8) is slidably provided on the outer wall of the discharge channel (9), and the collection groove (8) is fixedly connected to the discharge channel (9) by a locking bolt (10), and a scraper (22) is welded and fixed on the side wall of the radial connecting rod (23).

9. The thermal insulation structure for over-temperature transformation of the inlet flue of a carbon black tail gas boiler according to claim 1 is characterized in that: The pore sizes of the filter holes (11) on the inner wall of each group of thermal insulation pipes (2) gradually increase from left to right.

10. The thermal insulation structure for over-temperature transformation of the inlet flue of a carbon black tail gas boiler according to claim 1, characterized in that: The two smoke exhaust pipes (28) are both connected to the interior of the smoke inlet pipe (1), and the two smoke exhaust pipes (28) are symmetrically distributed along the center line of the smoke inlet pipe (1).

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