Efficient sleeve type internal heating drum cracking furnace kiln

Abstract

The utility model provides an efficient casing pipe type internal heating drum cracking furnace kiln which comprises a heat energy device, a sealed material conveying device, a furnace cylinder system and a roller system, the furnace cylinder system comprises an outer kiln pipe, an inner kiln pipe is fixedly connected in the outer kiln pipe, and the front end of the inner kiln pipe is fixedly connected with the sealed material conveying device. The rear end of the inner kiln pipe is further fixedly connected with a spiral sealing deslagging mechanism, a cracking gas leading-out pipe is inserted into the rear end of the spiral sealing deslagging mechanism, and the rolling belt of the outer kiln pipe is in rolling connection with the rolling wheel system. The rotational flow plate is designed on the outer wall of the inner kiln pipe, high-temperature hot air rotates and flows around the inner kiln pipe, the outer surface of the inner kiln pipe is subjected to uniform thermal radiation, the heat collecting pieces are uniformly arranged on the outer wall of the inner kiln pipe, the heat collecting area of the inner kiln pipe is increased, the standing time of the hot air in the hot air channel is prolonged, and the heat collecting effect is improved. The heat collecting efficiency of the inner kiln pipe is improved by 30%-40%, and the heat energy utilization rate and the thermal cracking gasification efficiency are improved.

Description

Technical Field

[0001] This utility model belongs to the field of pyrolysis furnace technology, specifically relating to a high-efficiency sleeve-type internal heating drum pyrolysis furnace. Background Technology

[0002] Pyrolysis gasification is an emerging technology in recent years and a popular research topic for scholars both domestically and internationally. Efficient operation of pyrolysis furnaces is a goal pursued in industrial engineering. However, the current thermal energy utilization rate of pyrolysis furnaces has remained within traditional ranges, and the heat extraction capacity of traditional pyrolysis furnaces needs improvement. To address this issue, this paper proposes a high-efficiency, sleeve-type internally heated drum pyrolysis furnace to improve thermal energy utilization by addressing the shortcomings of traditional structures. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a high-efficiency sleeve-type internally heated drum pyrolysis furnace that addresses the shortcomings of the prior art. This pyrolysis furnace reduces the rate of heat loss through jacketed internal heating, and the inner kiln tube is equipped with swirl plates and heat collection plates, which increases the efficiency of heat utilization and can be widely applied.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a high-efficiency sleeve-type internally heated drum pyrolysis furnace, characterized in that it includes a thermal energy device, a sealed material conveying device, a furnace cylinder system, and a roller system. The furnace cylinder system includes an outer kiln tube, and an inner kiln tube is fixedly connected to the outer kiln tube by at least three sets of hanging mechanisms. A hot air channel is formed between the inner and outer kiln tubes. Both ends of the inner kiln tube extend outside the outer kiln tube. The sealed material conveying device is fixedly connected to the front end of the inner kiln tube, and a spiral sealing slag discharge mechanism is fixedly connected to the rear end of the inner kiln tube. The furnace system is equipped with a pyrolysis gas outlet pipe. A hot air inlet hood is provided at the front end of the furnace system. The thermal energy device is installed on the hot air inlet hood and is the heat supply device of this device, providing high-temperature hot air of 800℃-1200℃ to the furnace system. A flue gas outlet hood is provided at the rear end of the furnace system. A flue gas outlet is provided at the top of the flue gas outlet hood. At least two rollers are fixedly fitted on the outer kiln tube. The rollers are tactilely connected to a roller system. The roller system includes rollers that correspond one-to-one with the rollers. The roller system drives the furnace system composed of the inner kiln tube and the outer kiln tube to rotate.

[0005] The high-temperature hot air generated by the thermal energy device is sent into the hot air channel of the concentric sleeve space through the hot air inlet hood to heat the inner kiln tube for thermal pyrolysis. After the heat exchange is completed, the tail smoke enters the exhaust hood and is discharged from the flue gas outlet set above the exhaust hood, and is transported to the flue gas treatment system.

[0006] The raw material rotates and tumbles in the inner kiln tube, exchanges heat with the inner kiln tube and rises in temperature, and gradually cracks and decomposes and moves to the rear end of the inner kiln tube. The distilled cracked gas is discharged through the cracked gas outlet pipe and sent to the condensation and classification system.

[0007] A swirl plate is fixedly installed on the inner kiln tube. The interlayer space between the outer kiln tube and the inner kiln tube is a hot air channel. The swirl plate is located in the hot air channel and is in close contact with the hot air inlet hood. Heat collecting plates are evenly arranged on the portion of the inner kiln tube located inside the outer kiln tube.

[0008] Under the action of the swirl plate, high-temperature hot air rotates and flows around the inner kiln tube in the hot air channel, so that the outer surface of the inner kiln tube is subjected to uniform thermal radiation. The heat-collecting plate increases the heat-collecting area of ​​the inner kiln tube and prolongs the residence time of the hot air in the hot air channel, which improves the heat collection efficiency of the inner kiln tube by 30%-40%. This allows the raw materials in the inner kiln tube to obtain at least 30% more thermal energy than traditional pyrolysis furnaces, thereby improving the thermal energy utilization rate and thermal pyrolysis gasification efficiency.

[0009] Preferably, the hot air inlet hood is fixedly connected to the inner kiln pipe via a second dynamic seal, the hot air inlet hood is fixedly connected to the outer kiln pipe via a third dynamic seal, the smoke outlet hood is fixedly connected to the outer kiln pipe via a fourth dynamic seal, and the smoke outlet hood is fixedly connected to the inner kiln pipe via a fifth dynamic seal, so that the hot air inlet hood, the hot air passage, and the smoke outlet hood form a sealed space that is interconnected.

[0010] Preferably, the sealed conveying device is fixedly connected to the inner kiln tube via a first dynamic seal. The sealed conveying device includes a auger shaft, and auger blades are fixedly installed on both ends of the auger shaft. The distance between the two sections of the auger blades is at least four times the diameter of the auger blades. The space between the two sections of the auger blades is a material sealing cavity. After the raw material enters the material sealing cavity, there is a lack of auger blades to move the material, resulting in congestion and accumulation. This isolates the inner kiln tube from the external environment through the sealed conveying device, thus achieving a sealing function and realizing the sealed conveying of the material to be pyrolyzed.

[0011] Preferably, the spiral sealing slag discharge mechanism has at least 5 spiral channels inside, a slag inlet is provided at the tail end of the spiral sealing slag discharge mechanism, a slag outlet is provided on the outer wall of the rear end of the inner kiln tube, and a slag conveying port is provided in the middle and lower part of the flue gas hood to facilitate slag discharge.

[0012] The remaining solid slag from pyrolysis enters the slag inlet of the spiral sealing slag discharge mechanism. It rotates synchronously with the furnace cylinder system in the spiral channel and moves along the spiral guide ring to the slag outlet, forming a spiral stacking and sealing structure. It is then discharged from the slag outlet and falls into the slag conveying port, exiting the furnace system and completing the pyrolysis and gasification process.

[0013] Preferably, the heat-collecting plates are arranged in a staggered array, with a row spacing of no more than 10cm and a column spacing of 20cm. The heat-collecting plates are fan-shaped and made of thin plates.

[0014] Preferably, the central axes of the outer kiln tube and the inner kiln tube are on the same straight line, and the inner wall of the outer kiln tube is provided with a refractory insulation layer, which can lock in the hot air energy passing through the hot air channel and prevent it from radiating outwards.

[0015] This utility model has the following advantages compared with the prior art:

[0016] This invention suspends the inner kiln tube inside the outer kiln tube using a hanging device. A swirl plate is designed on the outer wall of the inner kiln tube, causing high-temperature hot air to circulate and flow around it, resulting in uniform thermal radiation to the outer surface of the inner kiln tube. Heat-collecting fins are evenly distributed on the outer wall of the inner kiln tube, increasing its heat-collecting area and extending the residence time of the hot air in the hot air channel. This improves the heat collection efficiency of the inner kiln tube by 30%-40%, allowing the raw materials in the inner kiln tube to obtain at least 30% more thermal energy than in traditional pyrolysis furnaces, thus enhancing thermal energy utilization and pyrolysis gasification efficiency. The invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 yes Figure 1 Schematic diagram of the AA direction.

[0019] Figure 3 yes Figure 1 Diagram of the BB direction.

[0020] Figure 4 yes Figure 1 Diagram of the CC direction.

[0021] Figure 5 yes Figure 1 Schematic diagram of the DD direction.

[0022] Figure 6 yes Figure 1 A magnified view of point S in the middle.

[0023] Explanation of reference numerals in the attached figures:

[0024] Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0027] like Figures 1-6 As shown, this utility model provides a high-efficiency sleeve-type internally heated drum pyrolysis furnace, including a thermal energy device 1, a sealed material conveying device 3, a furnace cylinder system, and a roller system 24. The furnace cylinder system includes an outer kiln tube 14, and an inner kiln tube 13 is fixedly connected to the outer kiln tube 14 by at least three sets of hanging mechanisms 15. A hot air channel 25 is formed between the inner kiln tube 13 and the outer kiln tube 14. Both ends of the inner kiln tube 13 extend outside the outer kiln tube 14. The front end of the inner kiln tube 13 is fixedly connected to the sealed material conveying device 3, and the rear end of the inner kiln tube 13 is fixedly connected to a spiral sealing slag discharge mechanism 16. A pyrolysis gas outlet pipe 2 is inserted into the rear end of the spiral sealing slag discharge mechanism 16. 0. A hot air inlet hood 7 is provided at the front end of the furnace system. The thermal energy device 1 is installed on the hot air inlet hood 7. The thermal energy device 1 is the heat supply device of this device, providing high-temperature hot air of 800℃-1200℃ to the furnace system. A flue gas hood 22 is provided at the rear end of the furnace system. A flue gas outlet 19 is provided at the top of the flue gas hood 22. At least two rollers 11 are fixedly fitted on the outer kiln tube 14. The rollers 11 are tactilely connected to the roller system 24. The roller system 24 includes rollers that correspond one-to-one with the rollers 11. The roller system 24 drives the furnace system composed of the inner kiln tube 13 and the outer kiln tube 14 to rotate.

[0028] The high-temperature hot air generated by the thermal energy device 1 is sent into the hot air channel 25 of the concentric sleeve space through the hot air inlet hood 7 to heat the inner kiln tube 13 under thermal decomposition conditions. After the heat exchange is completed, the tail smoke enters the exhaust hood 22 and is discharged from the flue gas outlet 19 set above the exhaust hood 22 and transported to the flue gas treatment system.

[0029] The raw material rotates and tumbles in the inner kiln tube 13, exchanges heat with the inner kiln tube 13 and rises in temperature, and gradually cracks and decomposes and moves to the rear end of the inner kiln tube 13. The distilled cracked gas is discharged through the cracked gas outlet pipe 20 and sent to the condensation and classification system.

[0030] A swirl plate 8 is fixedly installed on the inner kiln tube 13. The interlayer space between the outer kiln tube 14 and the inner kiln tube 13 is a hot air channel 25. The swirl plate 8 is located in the hot air channel 25 and is in close contact with the hot air inlet hood 7. Heat collection plates 10 are evenly arranged on the part of the inner kiln tube 13 located inside the outer kiln tube 14.

[0031] Under the action of the swirl plate 8, the high-temperature hot air rotates and flows around the inner kiln tube 13 within the hot air channel 25, causing the outer surface of the inner kiln tube 13 to receive uniform thermal radiation. The heat-collecting plate 10 increases the heat-collecting area of ​​the inner kiln tube 13 and prolongs the residence time of the hot air in the hot air channel 25, thereby increasing the heat collection efficiency of the inner kiln tube 13 by 30%-40%. This allows the raw materials in the inner kiln tube 13 to obtain at least 30% more thermal energy than those in traditional pyrolysis furnaces, improving thermal energy utilization and thermal pyrolysis gasification efficiency.

[0032] In this embodiment, the hot air inlet hood 7 is fixedly connected to the inner kiln pipe 13 by the second dynamic seal 6, the hot air inlet hood 7 is fixedly connected to the outer kiln pipe 14 by the third dynamic seal 9, the smoke outlet hood 22 is fixedly connected to the outer kiln pipe 14 by the fourth dynamic seal 17, and the smoke outlet hood 22 is fixedly connected to the inner kiln pipe 13 by the fifth dynamic seal 18, so that the hot air inlet hood 7, the hot air channel 25 and the smoke outlet hood 22 form a sealed space that is interconnected.

[0033] In this embodiment, the sealed conveying device 3 is fixedly connected to the inner kiln tube 13 through the first dynamic seal 5. The sealed conveying device 3 includes a auger shaft 4, and auger blades are fixedly installed on both ends of the auger shaft 4. The distance between the two sections of the auger blades is at least 4 times the diameter of the auger blades. The space between the two sections of the auger blades is the material sealing cavity 2. After the raw material enters the material sealing cavity 2, there is a lack of auger blades to push the material, which forms a blockage and accumulation, and isolates the inner kiln tube 13 from the outside world through the sealed conveying device 3, thus playing a sealing role and realizing the sealed conveying of the material to be pyrolyzed.

[0034] In this embodiment, the spiral sealing slag discharge mechanism 16 is provided with at least 5 spiral channels, the tail end of the spiral sealing slag discharge mechanism 16 is provided with a slag inlet 26, the outer wall of the rear end of the inner kiln tube 13 is provided with a slag outlet 23, and the middle and lower part of the flue gas hood 22 is provided with a slag discharge conveying port 21 to facilitate slag discharge.

[0035] The remaining solid slag from pyrolysis enters the slag inlet 26 of the spiral sealing slag discharge mechanism 16, rotates synchronously with the furnace drum system in the spiral channel, moves along the spiral guide disc to the slag outlet 23, forming a spiral stacking sealing structure, and is discharged from the slag outlet 23, falling into the slag discharge conveyor 21, and discharged from the furnace system, completing the pyrolysis gasification process.

[0036] In this embodiment, the heat-collecting plates 10 are arranged in a staggered array, with a row spacing of no more than 10cm and a column spacing of 20cm. The heat-collecting plates 10 are fan-shaped and made of thin plates.

[0037] In this embodiment, the central axes of the outer kiln tube 14 and the inner kiln tube 13 are on the same straight line. The inner wall of the outer kiln tube 14 is provided with a refractory insulation layer 12, which can lock in the hot air energy passing through the hot air channel 25 and prevent it from radiating outwards.

[0038] In use, the raw material to be pyrolyzed is fed into the inner kiln tube 13 through the sealed conveying device 3. After the raw material enters the material sealing chamber 2, there is a lack of shear blades to push the material, which causes congestion and accumulation. This isolates the inner kiln tube 13 from the outside world through the sealed conveying device 3, thus realizing the sealed conveying of the material to be pyrolyzed.

[0039] The high-temperature hot air generated by the thermal energy device 1 is sent into the hot air channel 25 through the hot air inlet hood 7 to heat the kiln tube 13 under pyrolysis conditions. After heat exchange, the tail smoke enters the exhaust hood 22 and is discharged from the flue gas outlet 19 set above the exhaust hood 22, and is transported to the flue gas treatment system.

[0040] Under the action of the swirl plate 8, the high-temperature hot air rotates and flows around the inner kiln tube 13 in the hot air channel 25, so that the surface of the inner kiln tube 13 is subjected to uniform thermal radiation.

[0041] The roller system 24 drives the furnace cylinder system consisting of the inner kiln tube 13 and the outer kiln tube 14 to rotate. The raw material rotates and tumbles in the inner kiln tube 13, exchanges heat with the inner kiln tube 13 and rises in temperature, and gradually cracks and decomposes and moves to the rear end of the inner kiln tube 13. The distilled cracked gas is discharged through the cracked gas outlet pipe 20 set on the end face of the inner kiln tube 13 and sent to the condensation and classification system for classified collection of products.

[0042] The remaining solid slag from pyrolysis enters the slag inlet 26 of the spiral-sealed slag discharge mechanism 16. It rotates synchronously with the furnace cylinder system in the spiral channel, moving along the spiral guide ring to the slag outlet 23, forming a spiral stacking and sealing structure. The slag is then discharged from the inner kiln tube 13, falling into the slag conveying port 21, and exiting the furnace system, completing the pyrolysis and gasification process. The above description is merely a preferred embodiment of this utility model and does not constitute any limitation on the utility model. Any simple modifications, alterations, or equivalent changes made to the above embodiments based on the technical essence of the utility model shall still fall within the protection scope of the technical solution of this utility model.

Claims

1. A high-efficiency sleeve-type internally heated drum pyrolysis furnace, characterized in that, The system includes a thermal energy device (1), a sealed material conveying device (3), a furnace drum system, and a roller system (24). The furnace drum system includes an outer kiln tube (14). An inner kiln tube (13) is fixedly connected to the outer kiln tube (14) through multiple sets of hanging mechanisms (15). Both ends of the inner kiln tube (13) extend outside the outer kiln tube (14). The front end of the inner kiln tube (13) is fixedly connected to the sealed material conveying device (3), and the rear end of the inner kiln tube (13) is also fixedly connected to a spiral sealing slag discharge mechanism (16). The spiral sealing slag discharge mechanism (16) is fitted with a cracked gas outlet pipe (20) at its rear end. The furnace system is equipped with a hot air inlet hood (7) at its front end. The thermal energy device (1) is installed on the hot air inlet hood (7). The furnace system is equipped with a flue gas hood (22) at its rear end. The flue gas hood (22) is equipped with a flue gas outlet (19) at its top end. The outer kiln pipe (14) is fitted with a roller belt (11) which is connected to the roller system (24) in a rolling connection. A swirl plate (8) is fixedly installed on the inner kiln tube (13). The interlayer space between the outer kiln tube (14) and the inner kiln tube (13) is a hot air channel (25). The swirl plate (8) is located in the hot air channel (25). The swirl plate (8) is closely attached to the hot air inlet hood (7). Heat collection plates (10) are evenly arranged on the part of the inner kiln tube (13) located inside the outer kiln tube (14).

2. The high-efficiency sleeve-type internally heated drum pyrolysis furnace kiln according to claim 1, characterized in that, The hot air inlet hood (7) is fixedly connected to the inner kiln pipe (13) through the second dynamic seal (6), the hot air inlet hood (7) is fixedly connected to the outer kiln pipe (14) through the third dynamic seal (9), the smoke outlet hood (22) is fixedly connected to the outer kiln pipe (14) through the fourth dynamic seal (17), and the smoke outlet hood (22) is fixedly connected to the inner kiln pipe (13) through the fifth dynamic seal (18).

3. The high-efficiency sleeve-type internally heated drum pyrolysis furnace kiln according to claim 1, characterized in that, The sealed conveying device (3) is fixedly connected to the inner kiln tube (13) through the first dynamic seal (5). The sealed conveying device (3) includes a auger shaft (4). Auger blades are fixedly installed on both ends of the auger shaft (4). The distance between the two auger blades is at least 4 times the diameter of the auger blades.

4. The high-efficiency sleeve-type internally heated drum pyrolysis furnace kiln according to claim 1, characterized in that, The spiral sealing slag discharge mechanism (16) is provided with at least 5 spiral channels. The tail end of the spiral sealing slag discharge mechanism (16) is provided with a slag inlet (26). The outer wall of the rear end of the inner kiln tube (13) is provided with a slag outlet (23). The middle and lower part of the flue gas hood (22) is provided with a slag conveying port (21).

5. The high-efficiency sleeve-type internally heated drum pyrolysis furnace kiln according to claim 1, characterized in that, The heat-collecting plates (10) are arranged in a staggered array, with a row spacing of no more than 10cm and a column spacing of 20cm. The heat-collecting plates (10) are fan-shaped and made of thin plates.

6. The high-efficiency sleeve-type internally heated drum pyrolysis furnace kiln according to claim 1, characterized in that, The central axis of the outer kiln tube (14) is on the same straight line as the central axis of the inner kiln tube (13), and the inner wall of the outer kiln tube (14) is provided with a refractory insulation layer (12).

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