Vertical reverse-flame heating cracking furnace device having spiral cooling fins

Abstract

The present application relates to the field of solid waste treatment and relates to a vertical reverse-flame heating cracking furnace device having spiral cooling fins. The device mainly comprises a hopper, a first feed valve, a buffer chamber, a second feed valve, a gas outlet, a cylinder body, main reverse-flame flues, spiral cooling fins, a manhole, steel wire discharge ports, filter screens, carbon black discharge ports, first discharge valves, carbon black storage tanks, second discharge valves, discharge pipes, water seal tanks, a rotary mechanism, an external flue, a converging flue, a support frame, motors, speed reducers, a support seat, a straight cylinder section, a base, a curved pusher, a lower collection box, a burner, a heat transfer pipe, a main flue, and an upper collection box. In the device of the present application, a reverse-flame device greatly increases the heat transfer area, thereby improving heat radiation efficiency, and a spiral feeding structure is beneficial to slowing down the falling speed of waste tires and prolongs the retention time, thereby effectively preventing rapid falling and bottom accumulation of tires, further improving cracking efficiency. The device of the present application is suitable for cracking of waste tires.

Description

A vertical pyrolysis furnace device with spiral heat sink

[0001] This application claims priority to Chinese Patent Application No. 202411203094.2, filed on August 29, 2024, entitled "A Vertical Refrigerant Heating Pyrolysis Furnace Device with Spiral Heat Dissipation Fins", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to a vertical reheating pyrolysis furnace device with spiral heat sink, belonging to the field of solid waste treatment technology. Background Technology

[0003] The pyrolysis technology of waste tires originated in the 1980s. Kaminsky et al. are considered pioneers in the research of waste tire pyrolysis technology. Their team proved the feasibility of using pyrolysis technology to process waste tires and obtain pyrolysis products with high added value. Since then, a large number of scholars have conducted extensive research on waste tire pyrolysis technology, mainly focusing on the modification and upgrading of pyrolysis products. High-value-added pyrolysis products are obtained through co-pyrolysis, catalytic pyrolysis, and other methods.

[0004] The main products of waste tire pyrolysis include pyrolytic carbon black, pyrolytic oil, and pyrolysis gas. Pyrolytic carbon black can be recycled for tire manufacturing, and pyrolysis oil can be used to prepare fuel oil and chemical products. Both have high recycling value. The main components of pyrolysis gas are high-calorific-value small-molecule gases such as hydrogen and methane, which are often used as fuel for energy supply.

[0005] Chinese utility model patent application number 2023225002034, entitled "A Vertical Rotary Pyrolysis Reactor Applicable to Waste Tires," discloses a vertical rotary pyrolysis reactor suitable for waste tires. In this reactor, heating is achieved through central rotary heating, with flue gas from the inner cylinder exiting from the top. However, this technical solution suffers from the following problems: the high-temperature flue gas has a short residence time, resulting in significant heat loss. Therefore, the effective utilization of heat still needs further improvement.

[0006] Chinese utility model patent application number 2023225002034, entitled "A Vertical Rotary Pyrolysis Reactor Applicable to Waste Tires", discloses a vertical rotary pyrolysis reactor applicable to waste tires, including a discharge valve, an ash storage tank, a wire outlet, a cylinder, a feed inlet, a feeding mechanism, a flue gas outlet, a gas outlet, a rotating component, a distribution plate, a burner, an ash outlet, a rotary structure, and a support. The feeding mechanism is connected to the cylinder through the feed inlet, which is located at the top of the cylinder. The inner cylinder is located inside the cylinder, the flue gas outlet is located at the top of the inner cylinder, and the burner is located inside the inner cylinder. The rotating component is connected to the cylinder through a packing ring. The rotary structure is located on the bottom support of the inner cylinder, and the bottom of the inner cylinder is connected to the support. The distribution plate is connected to the inner cylinder, and the cylinder is provided with a wire outlet and an ash outlet. However, the vertical rotary pyrolysis reactor for waste tires still has the following problems: The vertical rotary pyrolysis furnace adopts a cross-shaped heat transfer tube structure, which has a small heat transfer surface area and the thermal radiation efficiency needs to be further improved. This method cannot meet the contact area requirements between high-temperature flue gas and tires for tire pyrolysis, and the contact area needs to be further increased to improve the tire pyrolysis efficiency. At the same time, when waste tires are fed, the large gaps in the heat transfer tubes make it easy for tires to accumulate at the bottom.

[0007] Therefore, providing a vertical reheating pyrolysis furnace device with spiral heat sinks to further increase the heat transfer area, improve the heat radiation efficiency, slow down the falling speed of waste tires, extend the residence time, effectively prevent the tires from falling rapidly and accumulating at the bottom, and further improve the pyrolysis efficiency has become an urgent technical problem to be solved in this field. Summary of the Invention

[0008] The purpose of this application is to provide a vertical tempering heating pyrolysis furnace device with spiral heat sink. The tempering device greatly increases the heat transfer area and improves the thermal radiation efficiency. At the same time, the rotating tempering flue can greatly increase the effective contact area with the tire. The spiral heat sink increases the specific surface area for heat transfer, and the spiral material feeding structure helps to slow down the falling speed of waste tires and prolong the residence time, effectively preventing the tires from falling rapidly and accumulating at the bottom, further improving the pyrolysis efficiency. It is suitable for pyrolysis furnaces for waste tires.

[0009] The above-mentioned objective of this application is achieved through the following technical solution:

[0010] A vertical tempering heating pyrolysis furnace device with spiral heat dissipation fins is characterized by mainly including: a hopper, a first feed valve, a buffer chamber, a second feed valve, a gas outlet, a cylinder, a main tempering flue, spiral heat dissipation fins, a manhole, a wire discharge port, a filter screen, a carbon black discharge port, a first discharge valve, a carbon black storage tank, a second discharge valve, a feed pipe, a water seal trough, a rotary mechanism, an external flue, a collecting flue, a support, a motor, a reducer, a support, a straight section, a base, a curved feeder, a lower header, a burner, a heat transfer tube, a main flue, and an upper header;

[0011] The hopper is connected to the first feed valve, the first feed valve is connected to the buffer chamber, the buffer chamber is connected to the second feed valve, the second feed valve is connected to the top of the cylinder, and the air outlet is located on one side of the top of the cylinder.

[0012] The wire discharge port is connected to the cylinder body and is located on one side of the discharge port. The carbon black discharge port is located at the bottom of the discharge port. The filter screen is located at the carbon black discharge port. The carbon black discharge port is connected to the first discharge valve, which is connected to the carbon black storage tank. The carbon black storage tank is connected to the second discharge valve. The wire discharge port is connected to the feed pipe, which is connected to the water seal trough.

[0013] The rotary mechanism is connected to the lower end of the straight section, and the upper end of the straight section is connected to the main flue. The burner is located at the bottom of the main flue. The lower end of the main flashover flue is connected to the lower header, and the upper end of the main flashover flue is connected to the upper header. Six sets of spiral heat dissipation fins are evenly distributed on the main flue. The lower end of the main flue is connected to the lower header, and the upper end of the main flue is connected to the upper header. The lower header is connected to the upper end of the collecting flue. The collecting flue extends to the outside through the middle gap of the support, and the lower end of the collecting flue is connected to the external connecting flue.

[0014] Optionally, the main backfire flue can be two, four, six, or eight, and can be evenly distributed along the central circle.

[0015] Optionally, the number of spiral heat sinks is 8, 10, or 12.

[0016] Optionally, the spiral heat sink is arranged along the circumference of the main flue, and viewed from above, it resembles an orange segment pattern. The spiral heat sink is welded perpendicular to the center line of the main flue, with an inclination angle of 35°-55°. The inclination angle of each group of spiral heat sinks is the same.

[0017] Optionally, a downward-sloping flange is provided at the end furthest from the main flue. The angle of the flange downward slope is 30-60°, and the flange length is 2-5mm.

[0018] Optionally, the upper surface of the spiral heat sink is provided with several rows of arc-shaped protrusions, each row of arc-shaped protrusions is staggered and evenly distributed along the upper surface of the spiral heat sink.

[0019] Optionally, the height of the arc-shaped protrusion 8-2 is 5-10mm;

[0020] The spacing between each row of arc-shaped protrusions and the spacing between adjacent arc-shaped protrusions in a row are 10-50mm.

[0021] Optionally, several downward-sloping oil recovery plates are provided below the spiral heat sink, and the oil recovery plates are evenly distributed along the length of the spiral heat sink.

[0022] Optionally, the oil recovery plate is tilted downwards at an angle of 35 to 55°;

[0023] The length of the oil spill recovery plate 8-3 is 100-150mm.

[0024] Optionally, a vertical rotating shaft is provided inside the buffer chamber and near the side wall of the buffer chamber, and a cutting blade is provided on the rotating shaft.

[0025] Optionally, the number of rotating shafts in the buffer chamber is 2, 4 or 6.

[0026] Optionally, the cutting blades are helical blades evenly arranged on the rotating shaft; or

[0027] The cutting blade includes a helical blade and at least two rotating cutter discs. The helical blades are evenly arranged above 1 / 2 the height of the rotating shaft, and the rotating cutter discs are arranged below 1 / 2 the height of the rotating shaft and evenly distributed along the axial direction of the rotating shaft. The rotating cutter discs are circular and have several arc-shaped helical blades evenly arranged circumferentially.

[0028] Optionally, the arc of the rotary cutter is 20-80°;

[0029] The number of curved rotary cutters 3-41 is 4-8.

[0030] Optionally, the rotary mechanism includes a driving wheel, a driven wheel, a rotary upper cover, and a rotary lower cover, wherein a reducer is connected to the driving wheel, the driven wheel is connected to the main tempering flue through a straight section, and the rotary upper cover is connected to the lower end of the straight section; the reducer drives the driving wheel to rotate, the driving wheel drives the driven wheel to rotate through gears, and the driven wheel drives the main tempering flue to rotate.

[0031] Optionally, the upper header is located at the upper end of the main flue, and the main return flue is radially distributed along the upper end of the main flue.

[0032] Optionally, the lower header is located at the lower end of the main flue and radially converges into the main return flue along the lower end of the main flue.

[0033] Optionally, the connection between the collecting flue and the external flue is a packing seal structure.

[0034] Optionally, the cylinder body is made of carbon steel lined with castable refractory, the main tempering flue is made of 310S, the upper and lower headers are made of 310S, the straight section is made of 310S, the external connecting flue is made of 310S, and the supports and bases are made of carbon steel.

[0035] Optionally, the burner is a low-NOx burner.

[0036] Optionally, the wire outlet is 1000mm*800mm to 1500mm*800mm.

[0037] Optionally, the feed tube is made of 310S or 316 stainless steel and is a round tube.

[0038] Optionally, the curved feeder adopts a curved structure, and the curved surface is designed according to the bottom area of ​​the pyrolysis chamber, which matches the slope of the bottom casting material, with an inclination angle of 5°-15°.

[0039] Optionally, the bending direction of the curved feeder is opposite to the rotation direction of the rotary mechanism.

[0040] Optionally, the filter screen is made of stainless steel wear-resistant wire mesh with a mesh size of 5mm-10mm.

[0041] Optionally, the first discharge valve is made of 304 stainless steel and is equipped with a water jacket and is hydraulically driven.

[0042] Optionally, the second discharge valve is made of 304 stainless steel and is equipped with a water jacket and is hydraulically driven.

[0043] Due to the application of the above-mentioned solution, this application has the following advantages and effects compared with the prior art:

[0044] 1. The vertical reheating pyrolysis furnace device with spiral heat sink of this application greatly increases the heat transfer area and improves the thermal radiation efficiency. At the same time, the rotating reheating flue can greatly increase the effective contact area with the tire. The spiral heat sink increases the specific surface area for heat transfer, and the spiral material feeding structure helps to slow down the falling speed of waste tires, prolong the residence time, effectively prevent the tires from falling rapidly and accumulating at the bottom, and further improve the pyrolysis efficiency. The carbon black and steel wire separation device is simple and reasonable, and can easily separate the carbon black and steel wire in the vertical pyrolysis furnace, thereby realizing the continuous operation of the vertical rotary pyrolysis furnace, which is suitable for the pyrolysis of waste tires.

[0045] The present application will be further described below with reference to the accompanying drawings and specific embodiments, but this does not imply any limitation on the scope of protection of the present application. Attached Figure Description

[0046] Figure 1 is a cross-sectional structural schematic diagram of the vertical reheating pyrolysis furnace device with spiral heat sink of Embodiment 1 of this application.

[0047] Figure 2 is an enlarged schematic diagram of the structure of the re-fire flue in the vertical re-fire heating pyrolysis furnace device with spiral heat sink in Embodiment 1 of this application.

[0048] Figure 3 is a schematic diagram of the spiral heat sink in the vertical reheating pyrolysis furnace device with spiral heat sink according to Embodiment 1 of this application.

[0049] Figure 4 is a top view of the curved material feeding structure in the vertical reheating pyrolysis furnace device with spiral heat sink of Embodiment 1 of this application.

[0050] Figure 5 is a cross-sectional schematic diagram of the rotary mechanism in the vertical reheating pyrolysis furnace device with spiral heat sink of Embodiment 1 of this application.

[0051] Figure 6 is a schematic diagram of the gear structure of the rotary mechanism in the vertical reheating pyrolysis furnace device with spiral heat sink in Embodiment 1 of this application.

[0052] Figure 7 is a side view of the spiral heat sink in the vertical reheating pyrolysis furnace device with spiral heat sink according to Embodiment 1 of this application.

[0053] Figure 8 is a cross-sectional view of the buffer chamber in the vertical reheating pyrolysis furnace device with spiral heat sink of Embodiment 1 of this application.

[0054] Figure 9 is another cross-sectional view of the buffer chamber in the vertical reheating pyrolysis furnace device with spiral heat sink of Embodiment 1 of this application.

[0055] Figure 10 is a top view of the rotating cutter head in the vertical reheating pyrolysis furnace device with spiral heat sink of Embodiment 1 of this application.

[0056] Explanation of key figure labels:

[0057] 1. Hopper; 2. First feed valve;

[0058] 3. Buffer chamber; 3-1. Rotary shaft; 3-2. Rotary motor; 3-3. Spiral blade; 3-4. Rotary cutter head; 3-4.1. Arc-shaped rotary cutter;

[0059] 4. Second feed valve; 5. Air outlet; 6. Cylinder body;

[0060] 7 Main tempering flue; 7-1 First main tempering flue; 7-2 Second main tempering flue; 7-3 Third main tempering flue; 7-4 Fourth main tempering flue; 7-5 Fifth main tempering flue; 7-6 Sixth main tempering flue;

[0061] 8. Spiral heat sink; 8-1. Folded edge; 8-2. Arc-shaped protrusion; 8-3. Oil and grease recovery plate;

[0062] 9. Manhole; 10. Wire discharge port; 11. Filter screen; 12. Carbon black discharge port; 13. First discharge valve; 14. Carbon black storage tank; 15. Second discharge valve; 16. Feed pipe; 17. Water seal tank;

[0063] 18. Rotary mechanism; 18-1 Rotary upper cover; 18-2 Driven wheel; 18-3 Driving wheel; 18-4 Rotary lower cover;

[0064] 19 External flue; 20 Collecting flue; 21 Support; 22 Motor; 23 Reducer; 24 Support; 25 Straight section; 26 Base; 27 Curved feeder; 28 Lower header; 29 Burner; 30 Heat transfer tube; 31 Main flue; 32 Upper header. Detailed Implementation

[0065] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application 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 application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0066] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0067] In this application, the terms "upper", "lower", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional assembly relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0068] In addition, the term "and / or" in this application means that it includes three parallel options. For example, "A and / or B" includes option A, option B, or an option that satisfies both A and B.

[0069] Example 1

[0070] Figure 1 is a cross-sectional structural schematic diagram of the vertical reheating and pyrolysis furnace device with spiral heat sink in Embodiment 1 of this application; Figure 2 is an enlarged structural schematic diagram of the reheating flue in the vertical reheating and pyrolysis furnace device with spiral heat sink in Embodiment 1 of this application; Figure 3 is a structural schematic diagram of the spiral heat sink in the vertical reheating and pyrolysis furnace device with spiral heat sink in Embodiment 1 of this application; Figure 4 is a top view structural schematic diagram of the curved material feeding mechanism in the vertical reheating and pyrolysis furnace device with spiral heat sink in Embodiment 1 of this application; Figure 5 is a cross-section of the rotary mechanism in the vertical reheating and pyrolysis furnace device with spiral heat sink in Embodiment 1 of this application. Schematic diagrams; Figure 6 is a schematic diagram of the gear structure of the rotary mechanism in the vertical tempering heating pyrolysis furnace device with spiral heat sink in Embodiment 1 of this application; Figure 7 is a side view of the spiral heat sink in the vertical tempering heating pyrolysis furnace device with spiral heat sink in Embodiment 1 of this application; Figure 8 is a cross-sectional view of the buffer chamber in the vertical tempering heating pyrolysis furnace device with spiral heat sink in Embodiment 1 of this application; Figure 9 is another cross-sectional view of the buffer chamber in the vertical tempering heating pyrolysis furnace device with spiral heat sink in Embodiment 1 of this application; Figure 10 is a top view of the rotating cutter head in the vertical tempering heating pyrolysis furnace device with spiral heat sink in Embodiment 1 of this application.

[0071] Among them, 1 is the hopper, 2 is the first feed valve, 3 is the buffer chamber, 4 is the second feed valve, 5 is the air outlet, 6 is the cylinder, 7 is the main tempering flue, 7-1 is the first main tempering flue, 7-2 is the second main tempering flue, 7-3 is the third main tempering flue, 7-4 is the fourth main tempering flue, 7-5 is the fifth main tempering flue, 7-6 is the sixth main tempering flue, 8 is the spiral heat sink, 8-1 is the folded edge, 8-2 is the arc-shaped protrusion, 8-3 is the oil recovery plate, 9 is the manhole, 10 is the wire discharge port, 11 is the filter screen, and 12 is the carbon black discharge port. 13 is the first discharge valve, 14 is the carbon black storage tank, 15 is the second discharge valve, 16 is the discharge pipe, 17 is the water seal trough, 18 is the rotary mechanism, 18-1 is the rotary upper cover, 18-2 is the driven wheel, 18-3 is the driving wheel, 18-4 is the rotary lower cover, 19 is the external flue, 20 is the collecting flue, 21 is the support, 22 is the motor, 23 is the reducer, 24 is the support, 25 is the straight section, 26 is the base, 27 is the curved feeder, 28 is the lower header, 29 is the burner, 30 is the heat transfer tube, 31 is the main flue, and 32 is the upper header.

[0072] The vertical tempering heating pyrolysis furnace device with spiral heat sink in Embodiment 1 of this application mainly includes a hopper 1, a first feed valve 2, a buffer chamber 3, a second feed valve 4, an air outlet 5, a cylinder 6, a main tempering flue 7, a first main tempering flue 7-1, a second main tempering flue 7-2, a third main tempering flue 7-3, a fourth main tempering flue 7-4, a fifth main tempering flue 7-5, a sixth main tempering flue 7-6, spiral heat sink 8, a folded edge 8-1, an arc-shaped protrusion 8-2, an oil recovery plate 8-3, a manhole 9, and a wire discharge port 10. 11. Filter screen; 12. Carbon black outlet; 13. First discharge valve; 14. Carbon black storage tank; 15. Second discharge valve; 16. Feed pipe; 17. Water seal trough; 18. Rotary rotating mechanism; 18-1. Rotary upper cover; 18-2. Driven wheel; 18-3. Rotary lower cover; 18-4. External flue; 19. Collecting flue; 20. Support; 21. Motor; 22. Reducer; 23. Support; 24. Straight section; 25. Base; 26. Curved feeder; 27. Lower header; 28. Burner; 29. ​​Heat transfer tube; 30. Main flue; 31. Upper header; 32.

[0073] The hopper 1 is connected to the first feed valve 2, the first feed valve 2 is connected to the buffer chamber 3, the buffer chamber 3 is connected to the second feed valve 4, the second feed valve 4 is connected to the top of the cylinder 6, and the air outlet 5 is located on one side of the top of the cylinder 6.

[0074] The wire discharge port 10 is connected to the cylinder 6 and is located on one side of the discharge port. The carbon black discharge port 12 is located at the bottom of the discharge port. The filter screen 11 is located at the carbon black discharge port 12. The carbon black discharge port 12 is connected to the first discharge valve 13. The first discharge valve 13 is connected to the carbon black storage tank 14. The carbon black storage tank 14 is connected to the second discharge valve 15. The wire discharge port 10 is connected to the feed pipe 16 and the feed pipe 16 is connected to the water seal trough 17.

[0075] The rotary mechanism 18 includes a rotary upper cover 18-1, a driven wheel 18-2, a driving wheel 18-3, and a rotary lower cover 18-4. A reducer 23 is connected to the driving wheel 18-3, which drives the driving wheel 18-3 to rotate. The driving wheel 18-3 drives the driven wheel 18-2 to rotate via gears, and the driven wheel 18-2 drives the main flashover flue 7 to rotate. The rotary upper cover 18-1, driven wheel 18-2, and rotary lower cover 18-4 are connected sequentially. The rotary upper cover 18-1 is connected to the lower end of the straight section 25, and the upper end of the straight section 25 is connected to the main flue 31. The device 29 is located at the bottom of the main flue 31. The lower end of the main tempering flue 7 is connected to the lower header 28, and the upper end of the main tempering flue 7 is connected to the upper header 32. Six sets of spiral heat dissipation fins 8 are evenly distributed on the main flue 31. The lower end of the main flue 31 (lower end 31-1) is connected to the lower header 28, and the upper end of the main flue 31 (upper end 31-2) is connected to the upper header 32. The lower header 28 is connected to the upper end of the collecting flue 20. The collecting flue 20 extends to the outside through the middle gap of the support 24. The lower end of the collecting flue 20 is connected to the external connecting flue 19.

[0076] The main tempering flue 7 includes the first main tempering flue 7-1, the second main tempering flue 7-2, the third main tempering flue 7-3, the fourth main tempering flue 7-4, the fifth main tempering flue 7-5, and the sixth main tempering flue 7-6;

[0077] The main flashover flue 7 can be two, four, six, or eight, and is evenly distributed along the central circle; in this embodiment 1, it is six.

[0078] The main flue 31 includes the lower end 31-1 and the upper end 31-2.

[0079] The main flue 31 is welded to the straight section 25, the straight section 25 is welded to the rotating upper cover 18-1 in the rotating mechanism 18, the rotating upper cover 18-1 is bolted to the driven wheel 18-2, the driven wheel 18-2 is bolted to the rotating lower cover 18-4, and the rotating lower cover 18-4 is welded to the support 24.

[0080] The upper header 32 is located at the upper end of the main flue 31, and the main return flue 7 is radially distributed along the upper end of the main flue;

[0081] The lower header 28 is located at the lower end of the main flue 31 and radially connects to the main return flue 7 along the lower end of the main flue;

[0082] The connection between the collecting flue 20 and the external flue 19 is a packing seal structure;

[0083] The cylinder 6 is made of carbon steel lined with castable refractory, the main tempering flue 7 is made of 310S, the upper header 32 and lower header 28 are made of 310S, the straight section 25 is made of 310S, the external flue 19 is made of 310S, and the support 24 and base 26 are made of carbon steel.

[0084] The number of spiral heat sinks 8 is set to 6-12, preferably 8-12. The spiral heat sinks 8 are evenly arranged from top to bottom on the main flue 31 with an adjacent spacing of 700mm.

[0085] Spiral heat sinks 8 are arranged from top to bottom along the circumference of the main flue 31. One end of the spiral heat sink 8 is welded to the main flue 31. When viewed from above, it is in the shape of orange segments. The spiral heat sink 8 is welded perpendicular to the center line of the main flue 31, with an inclination angle of 35°-55°. The inclination angle of each group of spiral heat sinks 8 is the same.

[0086] The aforementioned configuration, when the main flue 31 rotates, can drive the spiral heat sink 8 to rotate together. By setting its tilt angle, it can achieve the peeling of waste tires layer by layer, ensuring that they have been fully pyrolyzed by the time they reach the bottom, thereby improving the pyrolysis efficiency.

[0087] In one implementation, the end of the spiral heat sink 8 furthest from the main flue is provided with a downwardly inclined flange 8-1. The flange 8-1 is inclined downward at an angle of 30-60° and has a length of 2-5mm. This arrangement helps to support the spiral heat sink 8, extending its service life. In addition, since the flange 8-1 is downwardly inclined, it facilitates the downward fall of waste tires falling on the spiral heat sink 8, further improving the pyrolysis processing efficiency and avoiding pyrolysis dead zones. This enhances the ease of use of the device and allows for large-scale continuous operation.

[0088] Referring to Figure 7, in one embodiment, the upper surface of the spiral heat sink 8 is provided with several rows of arc-shaped protrusions 8-2, each row of arc-shaped protrusions 8-2 is staggered and evenly distributed along the upper surface of the spiral heat sink 8.

[0089] The arc-shaped protrusion 8-2 serves two purposes: first, it increases the contact area between the spiral heat sink 8 and the waste tire, thereby improving the heat uniformity of the waste tire; second, it increases the resistance between the waste tire and the spiral heat sink 8, increasing the residence time of the waste tire on the spiral heat sink 8, thus achieving layer-by-layer peeling of the waste tire. Both of these effects can further improve the pyrolysis efficiency of the waste tire, enabling the waste tire to be completely pyrolyzed during its fall.

[0090] In one implementation, the height of the arc-shaped protrusion 8-2 is 5-10mm. This height ensures optimal pyrolysis effect. If the height is too low, the above two functions cannot be effectively performed; if the height is too high, it will hinder the falling of waste tires, increase the processing time of waste tires, and thus reduce the processing efficiency of the device.

[0091] In one implementation, the spacing between each row of arc-shaped protrusions 8-2 and the spacing between adjacent arc-shaped protrusions 8-2 in a row are 10-50mm. This distance can be set according to the area of ​​the spiral heat sink 8 itself and the actual usage requirements.

[0092] Referring to Figure 7, in one embodiment, several downwardly inclined oil recovery plates 8-3 are arranged below the spiral heat sink 8, and the oil recovery plates 8-3 are evenly distributed along the length of the spiral heat sink 8. The oil recovery plates 8-3 can shield the high-temperature gas generated during pyrolysis. Firstly, the high-temperature gas can promote the pyrolysis of the tire, further improving the pyrolysis efficiency. Secondly, it can trap impurities and droplet-shaped oil carried in the high-temperature gas, preventing impurities and droplet-shaped oil from clogging the gas outlet and improving the safety of the heating pyrolysis furnace device.

[0093] As one implementation method, the oil recovery plate 8-3 is tilted downward at an angle of 35 to 55°. This angle is not only conducive to the above-mentioned function of efficiently intercepting impurities and droplet-shaped oil stains, but also allows the intercepted material to be thrown to the bottom of the pyrolysis furnace device as the spiral heat sink 8 rotates, so that it can flow out from the discharge port and improve the self-cleaning ability of the device.

[0094] There can be 4-10 oil sludge recovery plates 8-3 under each spiral heat sink 8, preferably 6-8. If too many oil sludge recovery plates 8-3 are set, the manufacturing cost of the device will increase, and it will be difficult to trap impurities and oil sludge. If too few are set, the above-mentioned functions cannot be effectively performed.

[0095] In one implementation, the length of the oil recovery plate 8-3 is 100-150mm.

[0096] The main flue 31 is welded to the straight section 25, the straight section 25 is welded to the rotating upper cover 18-1, the rotating upper cover 18-1 is bolted to the driven wheel 18-2, the driven wheel 18-2 is bolted to the rotating lower cover 1-4, and the rotating lower cover 18-4 is welded to the support 24. The spiral heat sink 8, the main flue 31, the straight section 25, the rotating upper cover 18-1, and the driven wheel 18-2 form a rotating shaft, which is supported by the rotating lower cover 18-4 and the support 24. It runs stably and moves in a uniform circular motion under the drive of the gear. The rotation speed is 4r / h, 6r / h, 8r / h, and 10r / h.

[0097] The reducer 23 drives the drive wheel 18-3 to rotate, and the drive wheel 18-3 drives the driven wheel 18-2 to rotate through the gear. The driven wheel 18-2 drives the main flue 31 to rotate.

[0098] Burner 29 is a low-NOx burner;

[0099] The carbon black discharge port 12 and the steel wire discharge port 10 are symmetrically arranged on both sides of the pyrolysis furnace;

[0100] The wire discharge port 10 can be 1000mm*800mm--1500mm*800mm;

[0101] The feed tube 16 is made of 310S or 316 stainless steel and can be a round tube.

[0102] The curved feeder 27 adopts a curved structure. The curved surface is designed according to the bottom area of ​​the pyrolysis chamber and matches the slope of the bottom casting material. The tilt angle is 5°-15°.

[0103] The bending direction of the curved feeder 27 is opposite to the rotation direction of the rotary mechanism 18;

[0104] Filter screen 11 is made of stainless steel wear-resistant wire mesh with a mesh size of 5mm-10mm;

[0105] The first discharge valve 13 is made of 304 stainless steel and is equipped with a water jacket and is hydraulically driven.

[0106] The second discharge valve 15 is made of 304 stainless steel and is equipped with a water jacket and is hydraulically driven.

[0107] The operation procedure of the vertical tempering heating pyrolysis furnace device with spiral heat sink of this application is as follows:

[0108] Waste tires or rubber are transported to silo 1, the first feed valve 2 is opened, and the waste tires or rubber enter the buffer silo 3. The first feed valve 2 is closed, and then the second feed valve 4 is opened. The waste tires or rubber enter the cylinder 6 and come into contact with the main tempering flue 7. Under the heat radiation of the high temperature flue gas, they peel off layer by layer. The gas produced by the cracking is discharged from the gas outlet 5 and enters the next cooling process.

[0109] As the vertical reheating pyrolysis furnace rotates, the stripped material accumulates at the bottom of the cylinder 6. When it rotates to the side of the curved feeder 27, the material accumulates and is blocked by the curved feeder 27, and is sequentially fed into the wire discharge ports 10 on both sides. Because the bending direction of the curved feeder 27 is opposite to the rotation direction of the rotary mechanism 18, it is easy to gather the broken carbon black and wire. When the broken carbon black is pushed to the bottom and outer periphery, it is filtered by the filter screen 11 and enters the carbon black storage tank 14 for cooling. The clumps of wire are squeezed to the wire discharge ports 10 on both sides and fall into the water seal tank 17 through the feed pipe 16.

[0110] Debug the rotary mechanism 18, adjust the flow rate of cracked gas or natural gas, and let the cracked gas or natural gas enter the burner 29 for ignition to generate high-temperature flue gas. The high-temperature flue gas flows along the main flue 31, upper header 32, main tempering flue 7, lower header 28, and enters the collecting flue 20. Then it enters the subsequent flue gas treatment equipment through the external flue 19.

[0111] Six sets of spiral heat sinks 8 are welded to the main flue 31, the main flue 31 is welded to the straight section 25, the straight section 25 is welded to the rotating upper cover 18-1, the rotating upper cover 18-1 is bolted to the driven wheel 18-2, the driven wheel 18-2 is bolted to the rotating lower cover 18-4, and the rotating lower cover 18-4 is welded to the support 24. In this way, the six sets of spiral heat sinks, the main flue, the straight section, the rotating upper cover, and the driven wheel form a rotating shaft, which runs stably on the rotating lower cover and the support. Driven by gears, it moves in a uniform circular motion. The rotation speed can be 4r / h, 6r / h, 8r / h, or 10r / h, and can be adjusted accordingly according to the different tire pyrolysis rates.

[0112] In the above process, waste tires enter the buffer chamber 3 through the hopper, and then enter the cylinder for heating treatment. The buffer chamber 3 serves two purposes: first, to preheat the waste tires, ensuring their readiness for subsequent pyrolysis; and second, to control the feeding speed, ensuring it matches the pyrolysis efficiency and improving the automation capability of the device. The feeding speed is controlled by the opening and closing times of the second feeding valve.

[0113] In one embodiment, a vertical rotating shaft 3-1 is provided inside the buffer chamber 3 near the side wall of the buffer chamber, and a cutting blade is provided on the rotating shaft 3-1.

[0114] The position of the rotating shaft 3-1 is close to the side wall of the buffer chamber 3, so it will not obstruct the falling of the waste tires. This setting allows the cutting blade on the rotating shaft 3-1 inside the buffer chamber 3 to cut the surface of the waste tires when they enter the buffer chamber 3, so that multiple cuts are formed on the surface of the waste tires, increasing the specific surface area of ​​the waste tires. This allows them to be heated more fully when they are pyrolyzed in the cylinder 6. In conjunction with the spiral heat sink, it improves the heating and pyrolysis efficiency of the waste tires.

[0115] Specifically, the number of rotating shafts 3-1 and the number and spacing of cutting blades on the rotating shafts 3-1 can be set according to the size of the tires to be processed, with the goal of achieving the best matching effect with the pyrolysis processing speed in the cylinder 6.

[0116] Those skilled in the art will understand that the cutting blades described above only create more cuts on the surface of the waste tires, and do not break the waste tires or damage their integrity. The waste tires that enter the cylinder 6 for pyrolysis are still whole tires.

[0117] In one implementation, the number of rotating shafts 3-1 within the buffer chamber 3 can be 2, 4, or 6, and the rotating shafts 3-1 are evenly arranged along the circumference of the buffer chamber 3. Figure 8 illustrates this using two rotating shafts 3-1 as an example. When the waste tire enters the buffer chamber 3, it is positioned between the two rotating shafts 3-1. The rotary motor 3-2 drives the rotating shafts 3-1 to rotate, allowing the cutting blades on the rotating shafts 3-1 to contact the tire and cut it, creating multiple cuts on the tire surface. During the cutting process, because the tire is a single unit and the buffer chamber 3 is positioned above the cylinder 6, the waste tire is preheated within the buffer chamber 3, making it relatively soft. This allows the cutting blades to effectively cut the waste tire. Furthermore, the cutting force exerted by the cutting blades on the waste tire during the cutting process causes slippage between the waste tire and the cutting blades, allowing the cutting blades to cut new areas. Thus, even with only two rotating shafts 3-1, the entire waste tire can be cut.

[0118] The aforementioned rotating shaft 3-1 is evenly arranged along the circumference of the buffer chamber 3, which can not only achieve uniform cutting of waste tires, but also place the waste tires in the center of the buffer chamber 3 through the cutting process, thereby ensuring that they enter the cylinder 6 at the same position, improving the convenience and consistency of the device in processing waste tire pyrolysis.

[0119] As one implementation, referring to Figure 8, the cutting blade is a spiral blade 3-3 evenly arranged on the rotating shaft 3-1. This arrangement enables the spiral uniform cutting of waste tires.

[0120] As another embodiment, referring to FIG9, the cutting blade includes a spiral blade 3-3 and at least two rotating cutter discs 3-4. The spiral blades 3-3 are evenly arranged above 1 / 2 height of the rotating shaft 3-1, and the rotating cutter discs 3-4 are arranged below 1 / 2 height of the rotating shaft 3-1 and are evenly distributed along the axial direction of the rotating shaft 3-1. The rotating cutter discs 3-4 are circular and have a plurality of arc-shaped spiral blades 3-41 evenly arranged circumferentially.

[0121] In this configuration, the rotating blade can perform rotary cutting on waste tires, and the arc-shaped rotary blade 3-41 on the rotating cutter head 3-4 can perform transverse cutting on waste tires. Therefore, the cuts formed on the surface of waste tires include transverse and other directions, which can further increase the specific surface area of ​​waste tires, thereby further improving the pyrolysis efficiency of the device.

[0122] Specifically, the arc of the curved rotary cutter 3-41 can be set as needed, and can be 20-80°.

[0123] Specifically, the number of arc-shaped rotary cutters 3-41 can be 4-8, preferably 6.

[0124] Referring to Figure 10, which is a top view of the rotating cutter head 3-4 on the rotating shaft 3-1, it can achieve transverse cutting of waste tires by rotating the rotating shaft 3-1 to obtain transverse cuts.

[0125] Specifically, the materials of the spiral blade 3-3 and the rotating cutter head 3-4 can be set according to requirements, and can be alloy or stainless steel, which can improve their corrosion resistance and durability.

[0126] The rotating shaft 3-1 installed inside the buffer chamber 3 can be removed periodically for maintenance to ensure that the cutting blade can efficiently cut waste tires.

[0127] The vertical reheating pyrolysis furnace device with spiral heat sink of this application directly places waste tires into the device for processing and pyrolysis, omitting the original tire crushing system and other components, resulting in high overall processing efficiency and saving processing steps.

[0128] Specific beneficial effects include: the main flue, main tempering flue, and spiral heat sink increase the heat transfer surface area by 220% compared to the tempering flue, greatly improving thermal radiation efficiency; simultaneously, the rotating main tempering flue and spiral heat sink significantly increase the effective contact area with the tires, and the spiral material feeding structure helps to slow down the falling speed of waste tires, ensuring thorough pyrolysis from top to bottom, with the tire surface fully pyrolyzed and partially broken and peeled off by the tempering flue and spiral heat sink; the spiral heat sink extends the tire residence time, effectively preventing rapid falling and bottom accumulation of tires, greatly improving pyrolysis efficiency; the carbon black and steel wire separation device is simple and reasonable, easily separating carbon black and steel wire from the vertical pyrolysis furnace, thus enabling continuous operation of the vertical rotary pyrolysis furnace, suitable for the pyrolysis of waste tires.

[0129] The above embodiments are only for illustrating the technical concept and features of this application, and are intended to enable those skilled in the art to understand the content of this application and implement it accordingly. They should not be construed as limiting the scope of protection of this application. All equivalent changes or modifications made in accordance with the spirit and essence of this application should be included within the scope of protection of this application.

Claims

1. A vertical reheating and pyrolysis furnace device with spiral heat sinks, wherein, include: Hopper, first feed valve, buffer bin, second feed valve, air outlet, cylinder, main tempering flue, spiral heat sink, manhole, wire discharge port, filter screen, carbon black discharge port, first discharge valve, carbon black storage tank, second discharge valve, feed pipe, water seal trough, rotary mechanism, external flue, collecting flue, support, motor, reducer, support, straight section, base, curved feeder, lower header, burner, heat transfer tube, main flue, upper header; The hopper is connected to the first feed valve, the first feed valve is connected to the buffer chamber, the buffer chamber is connected to the second feed valve, the second feed valve is connected to the top of the cylinder, and the air outlet is located on one side of the top of the cylinder. The wire discharge port is connected to the cylinder body and is located on one side of the discharge port. The carbon black discharge port is located at the bottom of the discharge port. The filter screen is located at the carbon black discharge port. The carbon black discharge port is connected to the first discharge valve, which is connected to the carbon black storage tank. The carbon black storage tank is connected to the second discharge valve. The wire discharge port is connected to the feed pipe, which is connected to the water seal trough. The rotary mechanism is connected to the lower end of the straight section, and the upper end of the straight section is connected to the main flue. The burner is located at the bottom of the main flue. The lower end of the main flashover flue is connected to the lower header, and the upper end of the main flashover flue is connected to the upper header. Six sets of spiral heat dissipation fins are evenly distributed on the main flue. The lower end of the main flue is connected to the lower header, and the upper end of the main flue is connected to the upper header. The lower header is connected to the upper end of the collecting flue. The collecting flue extends to the outside through the middle gap of the support, and the lower end of the collecting flue is connected to the external connecting flue.

2. The vertical reheating and pyrolysis furnace apparatus with spiral heat sinks according to claim 1, wherein, The main backfire flue consists of two, four, six, or eight flues, which are evenly distributed along the central circle.

3. The vertical reheating and pyrolysis furnace apparatus with spiral heat sinks according to claim 1, wherein, The number of spiral heat sinks is 8, 10, or 12.

4. The vertical reheating and pyrolysis furnace apparatus with spiral heat sinks according to claim 3, wherein, The spiral heat sinks are evenly arranged from top to bottom along the circumference of the main flue. The spiral heat sink is welded perpendicular to the center line of the main flue. The tilt angle of the spiral heat sink is 35°-55°, and the tilt angle of each group of spiral heat sinks is the same.

5. The vertical reheating and pyrolysis furnace apparatus with spiral heat sinks according to claim 4, wherein, The spiral heat sink has a downward-sloping folded edge at the end away from the main flue, with the folded edge tilting downward at an angle of 30-60° and a length of 2-5mm.

6. The vertical reheating and pyrolysis furnace apparatus with spiral heat sinks according to claim 1, wherein, The upper surface of the spiral heat sink has several rows of arc-shaped protrusions, which are arranged in an alternating pattern and are evenly distributed along the upper surface of the spiral heat sink.

7. The vertical reheating and pyrolysis furnace apparatus with spiral heat sinks according to claim 6, wherein, The height of the arc-shaped protrusion 8-2 is 5-10mm; The spacing between each row of arc-shaped protrusions and the spacing between adjacent arc-shaped protrusions in a row are 10-50mm.

8. The vertical reheating and pyrolysis furnace apparatus with spiral heat sinks according to claim 1, wherein, Several downward-sloping oil recovery plates are installed below the spiral heat sink, and the oil recovery plates are evenly distributed along the length of the spiral heat sink.

9. The vertical reheating and pyrolysis furnace apparatus with spiral heat sinks according to claim 1, wherein, The downward tilt angle of the oil spill recovery plate is 35° to 55°. The length of the oil spill recovery plate 8-3 is 100-150mm.

10. The vertical reheating and pyrolysis furnace apparatus with spiral heat sinks according to claim 1, wherein, A vertical rotating shaft is provided inside the buffer chamber and near the side wall of the buffer chamber, and a cutting blade is provided on the rotating shaft.

11. The vertical reheating and pyrolysis furnace apparatus with spiral heat sinks according to claim 10, wherein, The number of rotating shafts in the buffer chamber is 2, 4, or 6.

12. The vertical reheating and pyrolysis furnace apparatus with spiral heat sinks according to claim 10, wherein, The cutting blades are helical blades evenly arranged on the rotating shaft; or The cutting blade includes a helical blade and at least two rotating cutter discs. The helical blades are evenly arranged above 1 / 2 the height of the rotating shaft, and the rotating cutter discs are arranged below 1 / 2 the height of the rotating shaft and evenly distributed along the axial direction of the rotating shaft. The rotating cutter discs are circular and have several arc-shaped helical blades evenly arranged circumferentially.

13. The vertical reheating and pyrolysis furnace apparatus with spiral heat sinks according to claim 12, wherein, The arc of the curved rotary cutter is 20-80°; The number of curved rotary cutters 3-41 is 4-8.

14. The vertical reheating and pyrolysis furnace apparatus with spiral heat sinks according to claim 1, wherein, The rotary mechanism includes a driving wheel, a driven wheel, a rotary upper cover, and a rotary lower cover. The reducer is connected to the drive wheel, the driven wheel is connected to the main tempering flue through the straight section, and the rotary cover is connected to the lower end of the straight section. The reducer drives the drive wheel to rotate, which in turn drives the driven wheel to rotate via gears, and the driven wheel drives the main return flue to rotate.

15. The vertical reheating and pyrolysis furnace apparatus with spiral heat sinks according to claim 14, wherein, The upper header is located at the upper end of the main flue, and the main return flue is radially distributed along the upper end of the main flue; The lower header is located at the lower end of the main flue and radially converges into the main return flue along the lower end of the main flue.

16. The vertical reheating and pyrolysis furnace apparatus with spiral heat sinks according to claim 15, wherein, The connection between the collecting flue and the external flue is a packing seal structure.

17. The vertical reheating and pyrolysis furnace apparatus with spiral heat sinks according to claim 16, wherein, The cylinder body is made of carbon steel lined with castable refractory. The main tempering flue is made of 310S steel, the upper and lower headers are made of 310S steel, the straight section is made of 310S steel, the external connecting flue is made of 310S steel, and the supports and base are made of carbon steel.

18. The vertical reheating and pyrolysis furnace apparatus with spiral heat sinks according to claim 17, wherein, The burner is a low-NOx type burner.

19. The vertical reheating and pyrolysis furnace apparatus with spiral heat sinks according to claim 18, wherein, The wire outlet is 1000mm*800mm--1500mm*800mm; The feeding pipe is made of 310S or 316 stainless steel and is a round tube. The curved feeder adopts a curved structure, and the curved surface is designed according to the bottom area of ​​the pyrolysis chamber, which matches the slope of the bottom casting material, with an inclination angle of 5°-15°. The bending direction of the curved feeder is opposite to the rotation direction of the rotary mechanism; The filter screen is made of stainless steel wear-resistant wire mesh with a mesh size of 5mm-10mm. The first discharge valve is made of 304 stainless steel and is equipped with a water jacket and is hydraulically driven. The second discharge valve is made of 304 stainless steel and is equipped with a water jacket and is hydraulically driven.

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