Vertical type backfire heating cracking furnace device with spiral cooling fins

Abstract

The utility model relates to a vertical backfire heating cracking furnace device with spiral radiating fins, and belongs to the field of solid waste treatment. Mainly comprises a hopper, a first feed valve, a surge bin, a second feed valve, a gas outlet, a barrel, a main tempering flue, a spiral cooling fin, a manhole, a steel 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 discharge pipe, a water seal tank, a rotary rotating mechanism, an external flue, a collection flue, a bracket, a motor, a speed reducer, a support and a straight barrel section, the device comprises a base, a curved kick-out device, a lower header, a combustor, a heat transfer pipe, a main flue and an upper header. According to the device and the tempering device disclosed by the utility model, the heat transfer area is greatly increased, the heat radiation efficiency is improved, the spiral blanking structure is beneficial to reducing the falling speed of the waste tires and prolonging the residence time, the tires are effectively prevented from quickly falling and being stacked at the bottom, the cracking efficiency is further improved, and the device is suitable for cracking of the waste tires.

Description

Technical Field

[0001] The utility model relates to a vertical fire-returning heating pyrolysis furnace device with spiral fins, belonging to the technical field of solid waste treatment. Background Art

[0002] The waste tire pyrolysis technology began in the 1980s. Kaminsky et al. are considered to be the pioneers in the research of waste tire pyrolysis technology. Their team proved the feasibility of using pyrolysis technology to treat waste tires to obtain pyrolysis products with high added value. Since then, a large number of scholars have carried out extensive research on waste tire pyrolysis technology, and the main research directions are concentrated on the modification and upgrading of pyrolysis products. Through co-pyrolysis, catalytic pyrolysis and other methods, pyrolysis products with high added value are obtained.

[0003] The pyrolysis products of waste tires mainly include pyrolytic carbon black, pyrolytic oil and pyrolytic gas. Among them, pyrolytic carbon black can be recycled for tire manufacturing, and pyrolytic oil can be used to prepare fuel oil and chemical products, both of which have high recycling value; the main components of pyrolytic gas are high-calorific value small molecule gases such as hydrogen and methane, which are often used as fuel for energy supply.

[0004] The Chinese utility model patent with the application number 2023225002034 and the name of "a vertical rotating pyrolysis reaction device suitable for waste tires" discloses a vertical rotating pyrolysis reaction device suitable for waste tires. Among them, the heating method adopts intermediate rotary heating, and the flue gas in the inner cylinder is discharged from the upper end. However, this technical solution has the following problems: the residence time of high-temperature flue gas is short and the heat loss is large. Therefore, the effective utilization of heat still needs to be further improved.

[0005] The Chinese utility model patent with the application number 2023225002034 and the title of "A vertical rotating pyrolysis reaction device for waste tires" discloses a vertical rotating pyrolysis reaction device for waste tires, which includes a discharge valve, a dust storage tank, a steel wire outlet, a cylinder body, a feed inlet, a feeding mechanism, a flue gas outlet, an air outlet, a rotating component, a distribution plate, a burner, an ash outlet, a rotary rotating structure and a support; the feeding mechanism is connected to the cylinder body through the feed inlet, the feed inlet is arranged at the top of the cylinder body, an inner cylinder is arranged inside the cylinder body, the flue gas outlet is arranged at the top of the inner cylinder, the burner is arranged inside the inner cylinder, the rotating component is connected to the cylinder body through a packing ring, the rotary rotating structure is arranged on the support at the bottom of the inner cylinder, the bottom of the inner cylinder is connected to the support, the distribution plate is connected to the inner cylinder, and the cylinder body is provided with a steel wire outlet and an ash outlet. However, the vertical rotating pyrolysis reaction device for waste tires still has the following problems: the vertical rotating pyrolysis furnace adopts a cross-shaped heat transfer tube structure, the heat transfer surface area is relatively small, and the heat radiation efficiency needs to be further improved. In this way, for tire pyrolysis, it cannot meet the requirement of the contact area between high-temperature flue gas and tires, and it is necessary to further increase the contact area to improve the pyrolysis efficiency of tires; at the same time, when waste tires are fed, due to the large gaps in the heat transfer tubes, the tires are likely to accumulate at the bottom.

[0006] Therefore, providing a vertical backfire heating pyrolysis furnace device with spiral fins 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 rapid falling and bottom accumulation of tires, and further improve the pyrolysis efficiency has become an urgent technical problem to be solved in this technical field. Summary of the Invention

[0007] The purpose of the present utility model is to provide a vertical backfire heating pyrolysis furnace device with spiral fins. The backfire device greatly increases the heat transfer area and improves the heat radiation efficiency. At the same time, the rotating backfire flue greatly increases the effective contact area with the tires; the spiral fins increase the specific surface area of heat transfer, and the spiral feeding structure is conducive to slowing down the falling speed of waste tires, extending the residence time, effectively preventing the rapid falling and bottom accumulation of tires, further improving the pyrolysis efficiency, and being applicable to pyrolysis furnaces for waste tires.

[0008] The above object of the present utility model is achieved through the following technical solutions:

[0009] A vertical return-fire heating and cracking furnace device with spiral fins, characterized in that it mainly includes a hopper, a first feed valve, a buffer bin, a second feed valve, an air outlet, a cylinder body, a main tempering flue, spiral 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 tank, a rotary rotating mechanism, an external connection flue, a collecting flue, a support, a motor, a reducer, a support seat, a straight cylinder section, a base, a curved material pusher, a lower header, a burner, a heat transfer pipe, a main flue, an upper header;

[0010] The hopper is connected to the first feed valve, the first feed valve is connected to the buffer bin, the buffer bin is connected to the second feed valve, the second feed valve is connected to the top of the cylinder body, and the air outlet is arranged on one side of the top of the cylinder body;

[0011] The wire discharge port is connected to the cylinder body, the wire discharge port is arranged on one side of the discharge port, the carbon black discharge port is arranged at the bottom of the discharge port, the filter screen is arranged at the carbon black discharge port, the carbon black discharge port is connected to the first discharge valve, the first discharge valve is connected to the carbon black storage tank, and the carbon black storage tank is connected to the second discharge valve; the wire discharge port is connected to the feed pipe, and the feed pipe is connected to the water seal tank;

[0012] The rotary rotating mechanism is connected to the lower end of the straight cylinder section, the upper end of the straight cylinder section is connected to the main flue, the burner is arranged at the bottom of the main flue, the lower end of the main tempering flue is connected to the lower header, the upper end of the main tempering flue is connected to the upper header, six groups of spiral fins are evenly distributed on the main flue, the lower end of the main flue is connected to the lower header, 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 seat, and the lower end of the collecting flue is connected to the external connection flue.

[0013] Preferably, the number of the main tempering flues is two, four, six or eight, and they are evenly distributed along the central circle.

[0014] Preferably, the number of the spiral fins is 8, 10 or 12.

[0015] Preferably, the spiral fins are arranged along the circumference of the main tempering flue, and the top view is an orange petal pattern. The spiral fins are welded perpendicular to the center line of the main tempering flue, and the inclination angle is 35°-55°. The inclination angles of each group of spiral fins are the same. There are flanges around the spiral fins, and the width of the flange is 2-5mm.

[0016] Preferably, the rotary rotating mechanism includes a driving wheel, a driven wheel, a rotary upper cover and a rotary lower cover. Among them, the reducer is connected to the driving wheel, the driven wheel is connected to the main tempering flue through the straight cylinder section, and the rotary upper cover is connected to the lower end of the straight cylinder 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.

[0017] Preferably, the upper header is arranged at the upper end of the main flue, and the main tempering flue is radially distributed along the upper end of the main flue.

[0018] Preferably, the lower header is arranged at the lower end of the main flue, and the main tempering flue is radially aggregated along the lower end of the main flue.

[0019] Preferably, the connection between the collecting flue and the external connecting flue is a packing seal structure.

[0020] Preferably, the cylinder body is made of carbon steel lined with castable, the material of the main tempering flue is 310S, the materials of the upper header and the lower header are 310S, the material of the straight cylinder section is 310S, the material of the external connecting flue is 310S, and the supports and bases are made of carbon steel.

[0021] Preferably, the burner adopts a low-nitrogen burner.

[0022] Preferably, the wire discharge port is 1000mm * 800mm - 1500mm * 800mm.

[0023] Preferably, the feeding pipe is made of 310S or 316 and is a round pipe with a diameter of φ800mm - φ1200mm.

[0024] Preferably, the curved stock pusher adopts a curved structure, the curved surface is designed according to the bottom area of the cracking chamber, coincides with the slope of the castable at the bottom, and the inclination angle is 5° - 15°.

[0025] Preferably, the bending direction of the curved stock pusher is opposite to the rotation direction of the rotary mechanism.

[0026] Preferably, the filter screen adopts a stainless steel wear-resistant wire mesh, and the mesh holes are 5mm - 10mm.

[0027] Preferably, the first discharge valve is made of 304 material, is provided with a water jacket, and is hydraulically pushed.

[0028] Preferably, the second discharge valve is made of 304 material, is provided with a water jacket, and is hydraulically pushed.

[0029] Beneficial effects:

[0030] The vertical fire-return heating pyrolysis furnace device with spiral heat sinks of the present utility model greatly increases the heat transfer area through the fire-return device, enhances the heat radiation efficiency. At the same time, the rotating fire-return flue greatly increases the effective contact area with the tires; the spiral heat sinks increase the specific surface area of heat transfer, and the spiral feeding structure is conducive to slowing down the falling speed of waste tires, prolonging the residence time, effectively preventing the rapid falling of tires and bottom accumulation, and further improving the pyrolysis efficiency; the carbon black and steel wire separation device is simple and reasonable, and is easy to effectively separate the carbon black and steel wire of the vertical pyrolysis furnace, thereby realizing the continuous operation of the vertical rotary pyrolysis furnace, and is applicable to the pyrolysis of waste tires.

[0031] The following further illustrates the present utility model through the drawings and specific embodiments, but it does not mean limiting the protection scope of the present utility model. Brief Description of the Drawings

[0032] Figure 1 It is a schematic cross-sectional structure diagram of the vertical fire-return heating pyrolysis furnace device with spiral heat sinks in Embodiment 1 of the present utility model.

[0033] Figure 2 It is an enlarged schematic structure diagram of the fire-return flue in the vertical fire-return heating pyrolysis furnace device with spiral heat sinks in Embodiment 1 of the present utility model.

[0034] Figure 3 It is a schematic structure diagram of the spiral heat sinks in the vertical fire-return heating pyrolysis furnace device with spiral heat sinks in Embodiment 1 of the present utility model.

[0035] Figure 4 It is a schematic top view structure diagram of the curved feeding in the vertical fire-return heating pyrolysis furnace device with spiral heat sinks in Embodiment 1 of the present utility model.

[0036] Figure 5 It is a schematic cross-sectional structure diagram of the rotary drive mechanism in the vertical fire-return heating pyrolysis furnace device with spiral heat sinks in Embodiment 1 of the present utility model.

[0037] Figure 6 It is a schematic gear structure diagram of the rotary drive mechanism in the vertical fire-return heating pyrolysis furnace device with spiral heat sinks in Embodiment 1 of the present utility model.

[0038] Main reference numerals description:

[0039] 1 Hopper 2 First feed valve

[0040] 3 Buffer bin 4 Second feed valve

[0041] 5 Gas outlet 6 Cylinder

[0042] 7 Main fire-return flue 7-1 First main fire-return flue

[0043] 7-2 Second Main Tempering Flue 7-3 Third Main Tempering Flue

[0044] 7-4 Fourth Main Tempering Flue 7-5 Fifth Main Tempering Flue

[0045] 7-6 Sixth Main Tempering Flue 8 Spiral Radiator Fins

[0046] 8-1 First Spiral Radiator Fin 8-2 Second Spiral Radiator Fin

[0047] 8-3 Third Spiral Radiator Fin 8-4 Fourth Spiral Radiator Fin

[0048] 8-5 Fifth Spiral Radiator Fin 8-6 Sixth Spiral Radiator Fin

[0049] 9 Manhole 10 Steel Wire Discharge Outlet

[0050] 11 Filter Screen 12 Carbon Black Discharge Outlet

[0051] 13 First Discharge Valve 14 Carbon Black Storage Tank

[0052] 15 Second Discharge Valve 16 Discharge Pipe

[0053] 17 Water Seal Tank 18 Rotary Rotating Mechanism

[0054] 18-1 Rotary Upper Cover 18-2 Driven Wheel

[0055] 18-3 Driving Wheel 18-4 Rotary Lower Cover

[0056] 19 External Connecting Flue 20 Collecting Flue

[0057] 21 Bracket 22 Motor

[0058] 23 Reducer 24 Support

[0059] 25 Straight Cylinder Section 26 Base

[0060] 27 Curved Material Pusher 28 Lower Header

[0061] 29 Burner 30 Heat Transfer Pipe

[0062] 31 Main Flue 32 Upper Header Specific Embodiment

[0063] Unless otherwise specified, in the embodiments of the present utility model, the used components are all conventional components that can be purchased in the market in this technical field. The connections between the components are all conventional connections, and the unit is a weight unit.

[0064] Embodiment 1

[0065] As Figure 1As shown, it is a schematic cross-sectional structure diagram of the vertical fire-return heating cracking furnace device with spiral fins in Embodiment 1 of the present utility model; as Figure 2 It is a schematic enlarged structure diagram of the fire-return flue in the vertical fire-return heating cracking furnace device with spiral fins in Embodiment 1 of the present utility model; as Figure 3 It is a schematic structure diagram of the spiral fins in the vertical fire-return heating cracking furnace device with spiral fins in Embodiment 1 of the present utility model; as Figure 4 It is a schematic top view structure diagram of the curved material pusher in the vertical fire-return heating cracking furnace device with spiral fins in Embodiment 1 of the present utility model; as Figure 5 It is a schematic cross-sectional structure diagram of the rotary drive mechanism in the vertical fire-return heating cracking furnace device with spiral fins in Embodiment 1 of the present utility model; as Figure 6 It is a schematic gear structure diagram of the rotary drive mechanism in the vertical fire-return heating cracking furnace device with spiral fins in Embodiment 1 of the present utility model; wherein, 1 is the hopper, 2 is the first feed valve, 3 is the buffer bin, 4 is the second feed valve, 5 is the gas outlet, 6 is the cylinder body, 7 is the main fire-return flue, 7-1 is the first main fire-return flue, 7-2 is the second main fire-return flue, 7-3 is the third main fire-return flue, 7-4 is the fourth main fire-return flue, 7-5 is the fifth main fire-return flue, 7-6 is the sixth main fire-return flue, 8 is the spiral fin, 8-1 is the first spiral fin, 8-2 is the second spiral fin, 8-3 is the third spiral fin, 8-4 is the fourth spiral fin, 8-5 is the fifth spiral fin, 8-6 is the sixth spiral fin, 9 is the manhole, 10 is the wire discharge port, 11 is the filter screen, 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 blanking pipe, 17 is the water seal tank, 18 is the rotary drive 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 connection flue, 20 is the collecting flue, 21 is the support, 22 is the motor, 23 is the reducer, 24 is the support seat, 25 is the straight cylinder section, 26 is the base, 27 is the curved material pusher, 28 is the lower header, 29 is the burner, 30 is the heat transfer tube, 31 is the main flue, 32 is the upper header;

[0066] The vertical fire-return heating cracking furnace device with spiral fins in Embodiment 1 of the present utility model mainly includes a hopper 1, a first feed valve 2, a buffer bin 3, a second feed valve 4, an air outlet 5, a cylinder body 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 fins 8, a first spiral fin 8-1, a second spiral fin 8-2, a third spiral fin 8-3, a fourth spiral fin 8-4, a fifth spiral fin 8-5, a sixth spiral fin 8-6, a manhole 9, a wire discharge port 10, a filter screen 11, a carbon black discharge port 12, a first discharge valve 13, a carbon black storage tank 14, a second discharge valve 15, a blanking pipe 16, a water seal tank 17, a rotary driving mechanism 18, a rotary upper cover 18-1, a driven wheel 18-2, a driving wheel 18-3, a rotary lower cover 18-4, an external connection flue 19, a collecting flue 20, a support 21, a motor 22, a speed reducer 23, a support 24, a straight cylinder section 25, a base 26, a curved material pusher 27, a lower header 28, a burner 29, a heat transfer pipe 30, a main flue 31, and an upper header 32;

[0067] The hopper 1 is connected to the first feed valve 2, the first feed valve 2 is connected to the buffer bin 3, the buffer bin 3 is connected to the second feed valve 4, the second feed valve 4 is connected to the top of the cylinder body 6, and the air outlet 5 is arranged on one side of the top of the cylinder body 6;

[0068] The wire discharge port 10 is connected to the cylinder body 6, the wire discharge port 10 is arranged on one side of the discharge port, the carbon black discharge port 12 is arranged at the bottom of the discharge port, the filter screen 11 is arranged 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, and the carbon black storage tank 14 is connected to the second discharge valve 15; the wire discharge port 10 is connected to the blanking pipe 16, and the blanking pipe 16 is connected to the water seal tank 17;

[0069] The rotary drive 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. Among them, the speed reducer 23 is connected to the driving wheel 18-3, and the speed reducer 23 drives the driving wheel 18-3 to rotate. The driving wheel 18-3 drives the driven wheel 18-2 to rotate through gears, and the driven wheel 18-2 drives the main tempering flue 7 to rotate. The rotary upper cover 18-1, the driven wheel 18-2, and the rotary lower cover 18-4 are connected in sequence. The rotary upper cover 18-1 is connected to the lower end of the straight section 25. The upper end of the straight section 25 is connected to the main flue 31. The burner 29 is arranged 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 groups of spiral fins 8 (the first spiral fin 8-1, the second spiral fin 8-2, the third spiral fin 8-3, the fourth spiral fin 8-4, the fifth spiral fin 8-5, and the sixth spiral fin 8-6) are evenly distributed on the main flue 31. The lower end (the lower end 31-1 of the main flue) of the main flue 31 is connected to the lower header 28, and the upper end (the upper end 31-2 of the main flue) of the main flue 31 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 connection flue 19;

[0070] The main tempering flue 7 includes 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, and a sixth main tempering flue 7-6;

[0071] The main tempering flue 7 can be two, four, six, or eight, and is evenly distributed along the center circle. In this embodiment 1, there are six;

[0072] The main flue 31 includes a lower end 31-1 of the main flue and an upper end 31-2 of the main flue;

[0073] The main flue 31 is welded to the straight section 25. The straight section 25 is welded to the rotary upper cover 18-1 in the rotary drive mechanism 18. The rotary upper cover 18-1 is bolted to the driven wheel 18-2. The driven wheel 18-2 is bolted to the rotary lower cover 18-4. The rotary lower cover 18-4 is welded to the support 24;

[0074] The upper header 32 is arranged at the upper end of the main flue 31, and the main tempering flue 7 is radially distributed along the upper end of the main flue;

[0075] The lower header 28 is arranged at the lower end of the main flue 31, and the main tempering flue 7 is radially collected along the lower end of the main flue;

[0076] The connection between the collecting flue 20 and the external connection flue 19 is a packing seal structure;

[0077] The cylinder body 6 is made of carbon steel lined with castable material. The main tempering flue 7 is made of 310S material. The upper header 32 and the lower header 28 are made of 310S material. The straight section 25 is made of 310S material. The external connection flue 19 is made of 310S material. The supports 24 and the base 26 are made of carbon steel material;

[0078] The spiral fins 8 include the first spiral fin 8-1, the second spiral fin 8-2, the third spiral fin 8-3, the fourth spiral fin 8-4, the fifth spiral fin 8-5, and the sixth spiral fin 8-6. They are arranged vertically on the main flue 31 from top to bottom with a spacing of 700 mm;

[0079] The spiral fins 8 are arranged along the circumference of the main tempering flue 7. When viewed from above, they are in the shape of orange petals. The spiral fins 8 are welded perpendicular to the center line of the main tempering flue 7 with an inclination angle of 35° - 55°. The inclination angle of each group of spiral fins 8 is the same. There are flanges around the spiral fins 8 with a flange width of 2 - 5 mm. The number of spiral fins 8 arranged in a circular pattern in each group can be 8, 10, or 12;

[0080] The other end of the spiral fin 8 is 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 rotary upper cover 18-1. The rotary upper cover 18-1 is bolted to the driven wheel 18-2. The driven wheel 18-2 is bolted to the rotary lower cover 18-4. The rotary lower cover 18-4 is welded to the support 24. The spiral fin 8, the main flue 31, the straight section 25, the rotary upper cover 18-1, and the driven wheel 18-2 form a rotating shaft body, which is supported on the rotary lower cover 18-4 and the support 24 and runs stably. Driven by the gear, it makes a uniform circular motion at a rotation speed of 4 r / h, 6 r / h, 8 r / h, 10 r / h;

[0081] The reducer 23 drives the driving wheel 18-3 to rotate. The driving 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;

[0082] The burner 29 adopts a low-nitrogen burner;

[0083] The carbon black discharge port 12 and the wire discharge port 10 are symmetrically arranged on both sides of the cracking furnace;

[0084] The wire discharge port 10 can be 1000 mm * 800 mm - 1500 mm * 800 mm;

[0085] The feeding pipe 16 is made of 310S or 316 and can be a round pipe with a diameter of φ800 mm - φ1200 mm;

[0086] The curved material pusher 27 adopts a curved structure. The curved surface is designed according to the bottom area of the cracking chamber and coincides with the slope of the castable material at the bottom with an inclination angle of 5° - 15°;

[0087] The bending direction of the curved stock pusher 27 is opposite to the rotation direction of the rotary mechanism 18;

[0088] The filter screen 11 is made of stainless steel wear-resistant wire mesh with mesh holes of 5 mm - 10 mm;

[0089] The first discharge valve 13 is made of 304 material, is provided with a water jacket, and is hydraulically pushed;

[0090] The second discharge valve 15 is made of 304 material, is provided with a water jacket, and is hydraulically pushed.

[0091] The operation process of the vertical fire-return heating cracking furnace device with spiral fins of the present utility model is as follows:

[0092] The waste tires or rubber are conveyed to the silo 1, the first feed valve 2 is opened, and they enter the buffer bin 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 body 6, contact with the main fire-return flue 7, and are gradually peeled off under the thermal radiation of the high-temperature flue gas. The gas produced by cracking is discharged from the gas outlet 5 and enters the next cooling process;

[0093] The peeled materials, along with the rotation of the vertical fire-return heating cracking furnace, accumulate at the bottom of the cylinder body 6. When they turn to one side of the curved stock pusher 27, with the accumulation of materials and the obstruction of the curved stock pusher 27, they are sequentially dialed into the wire discharge ports 10 on both sides. Because the bending direction of the curved stock pusher 27 is opposite to the rotation direction of the rotary mechanism 18, it is convenient to gather the crushed carbon black and steel wires. When the crushed carbon black is dialed towards the outer periphery of the bottom, it is filtered by the filter screen 11 and then enters the carbon black storage tank 14 for cooling. The agglomerated steel wires are squeezed to the wire discharge ports 10 on both sides and fall into the water seal tank 17 through the feed pipe 16;

[0094] The rotary mechanism 18 is debugged, the flow rate of the cracking gas or natural gas is adjusted, the cracking gas or natural gas enters the burner 29, and is ignited to generate high-temperature flue gas. The high-temperature flue gas enters the subsequent flue gas treatment equipment through the main flue 31, the upper header 32, the main fire-return flue 7, the lower header 28, and enters the collecting flue 20, and then through the external connection flue 19;

[0095] Six groups of spiral radiating fins 8 are welded to the main flue 31, the main flue 31 is welded to the straight cylinder section 25, the straight cylinder section 25 is welded to the rotary upper cover 18-1, the rotary upper cover 18-1 is bolted to the driven wheel 18-2, the driven wheel 18-2 is bolted to the rotary lower cover 18-4, and the rotary lower cover 18-4 is welded to the support 24. In this way, the six groups of spiral radiating fins, the main flue, the straight cylinder section, the rotary upper cover, and the driven wheel form a rotating shaft body, which operates stably on the rotary lower cover and the support, and makes a uniform circular motion driven by the gear. The rotation rate can be 4 r / h, 6 r / h, 8 r / h, 10 r / h, and corresponding adjustments are made according to the different amounts of tire cracking.

[0096] The beneficial effects of the vertical fire-returning heating cracking furnace device with spiral radiating fins of the present invention are as follows: The setting of the main flue, the main fire-returning flue, and the spiral radiating fins increases the heat transfer surface area, which is 220% more than that of the fire-returning flue, greatly improving the heat radiation efficiency. At the same time, the rotating main fire-returning flue and spiral radiating fins greatly increase the effective contact area with the tires. The spiral feeding structure is conducive to slowing down the falling speed of waste tires. From top to bottom, the tires are fully cracked, the surface of the tires is fully cracked, and part of them is broken and peeled off by the fire-returning flue and the spiral radiating fins. The spiral radiating fins extend the residence time of the tires, effectively preventing the rapid falling of the tires and the accumulation at the bottom, and greatly improving the cracking efficiency. The carbon black and steel wire separation device is simple and reasonable, and is easy to effectively separate the carbon black and steel wire of the vertical cracking furnace, thereby realizing the continuous operation of the vertical rotary cracking furnace, which is suitable for the cracking of waste tires.

[0097] The above is only the preferred specific implementation manner 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 or equivalent substitution or change, should be covered by the protection scope of the present invention.

Claims

1. A vertical fire-return heating pyrolysis furnace device with spiral fins, characterized in that: It mainly includes a hopper, a first feed valve, a buffer bin, a second feed valve, an air outlet, a cylinder body, a main tempering flue, spiral 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 blanking pipe, a water seal tank, a rotary rotating mechanism, an external connection flue, a collecting flue, a support, a motor, a speed reducer, a support seat, a straight cylinder section, a base, a curved batcher, a lower header, a burner, a heat transfer pipe, a main flue, an upper header; The hopper is connected to the first feed valve, the first feed valve is connected to the buffer bin, the buffer bin is connected to the second feed valve, the second feed valve is connected to the top of the cylinder body, and the air outlet is arranged on one side of the top of the cylinder body; The wire discharge port is connected to the cylinder body, the wire discharge port is arranged on one side of the discharge port, the carbon black discharge port is arranged at the bottom of the discharge port, the filter screen is arranged at the carbon black discharge port, the carbon black discharge port is connected to the first discharge valve, the first discharge valve is connected to the carbon black storage tank, and the carbon black storage tank is connected to the second discharge valve; The wire discharge port is connected to the blanking pipe, and the blanking pipe is connected to the water seal tank; The rotary rotating mechanism is connected to the lower end of the straight cylinder section, the upper end of the straight cylinder section is connected to the main flue, the burner is arranged at the bottom of the main flue, the lower end of the main tempering flue is connected to the lower header, the upper end of the main tempering flue is connected to the upper header, six groups of spiral fins are evenly distributed on the main flue, the lower end of the main flue is connected to the lower header, 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 seat, and the lower end of the collecting flue is connected to the external connection flue.

2. The vertical return fire heating and cracking furnace device with spiral heat sinks according to claim 1, characterized in that: The number of the main tempering flues is two, four, six or eight, and they are evenly distributed along the central circle.

3. The vertical backfire heating pyrolysis furnace device with spiral fins according to claim 2, characterized in that: The number of the spiral fins is 8, 10 or 12.

4. The vertical backfire heating cracking furnace device with spiral heat sinks according to claim 3, characterized in that: The spiral fins are arranged along the circumference of the main tempering flue, and the top view is an orange petal pattern. The spiral fins are welded perpendicular to the center line of the main tempering flue, and the inclination angle is 35°-55°. The inclination angles of each group of spiral fins are the same. There are flanges around the spiral fins, and the flange is 2-5mm.

5. The vertical return-fire heating cracking furnace device with spiral heat sinks according to claim 4, characterized in that: The rotary rotating mechanism includes a driving wheel, a driven wheel, a rotary upper cover and a rotary lower cover. Among them, the speed reducer is connected to the driving wheel, the driven wheel is connected to the main tempering flue through the straight cylinder section, and the rotary upper cover is connected to the lower end of the straight cylinder section; The speed reducer drives the driving wheel to rotate, the driving wheel drives the driven wheel to rotate through the gear, and the driven wheel drives the main tempering flue to rotate.

6. The vertical backfire heating pyrolysis furnace device with spiral fins according to claim 5, characterized in that: The upper header is arranged at the upper end of the main flue, and the main tempering flues are radially distributed along the upper end of the main flue; The lower header is arranged at the lower end of the main flue, and the main tempering flues are radially summarized along the lower end of the main flue.

7. The vertical return fire heating cracking furnace device with spiral heat sinks according to claim 6, characterized in that: The connection between the collecting flue and the external connection flue is a packing seal structure.

8. The vertical backfire heating pyrolysis furnace device with spiral fins according to claim 7, characterized in that: The cylinder body is made of carbon steel lined with castable, the material of the main tempering flue is 310S, the materials of the upper header and the lower header are 310S, the material of the straight cylinder section is 310S, the material of the external connection flue is 310S, and the support seat and the base are made of carbon steel.

9. The vertical return fire heating and cracking furnace device with spiral fins according to claim 8, characterized in that: The burner adopts a low-nitrogen burner.

10. The vertical backfire heating cracking furnace device with spiral heat sinks according to claim 9, characterized in that: The wire outlet is 1000mm*800mm - 1500mm*800mm; the feeding pipe is made of 310S or 316, and is a round pipe with a diameter of φ800mm - φ1200mm; the curved material pusher adopts a curved structure, and the curved surface is designed according to the bottom area of the cracking chamber, and is consistent with the slope of the castable at the bottom, with an inclination angle of 5° - 15°; the bending direction of the curved material pusher is reverse to the rotation direction of the rotary mechanism; the filter screen adopts a stainless steel wear-resistant wire mesh, and the mesh holes are 5mm - 10mm; the first discharge valve is made of 304 material, and is provided with a water jacket and is hydraulically pushed; the second discharge valve is made of 304 material, and is provided with a water jacket and is hydraulically pushed.

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