Solid waste pyrolysis device using waste heat circulation heating

Abstract

This invention relates to the field of pyrolysis equipment technology and discloses a solid waste pyrolysis device that utilizes waste heat recycling, solving the problem that existing solid waste pyrolysis devices cannot recycle waste heat. The device includes a pyrolysis furnace, a pulverized material feeding channel at the top of the furnace, a pulverized material preheating and conveying mechanism at the top of the feeding channel, a pulverizing chamber at one end of the top of the pulverizing chamber, a feeding conveyor belt and a gas collecting hood at the top of the pulverizing chamber, a gas collecting chamber at one end of the bottom of the pulverizing material preheating and conveying mechanism, a gas guide pipe at the bottom of the gas collecting chamber, a heat insulation shell at the bottom of the gas guide pipe, a tubular heat exchanger inside the heat insulation shell, an exhaust pipe at one end of the bottom of the tubular heat exchanger, and a flue gas processor at the other end of the exhaust pipe. This solid waste pyrolysis device can utilize waste heat to preheat the raw materials and intake air, allowing the raw materials and intake air to enter the pyrolysis furnace at high temperatures, thus realizing the recycling of waste heat.

Description

Technical Field

[0001] This invention belongs to the technical field of pyrolysis devices, specifically a solid waste pyrolysis device that utilizes waste heat recycling for heating. Background Technology

[0002] In recent years, pyrolysis technology for solid waste treatment has attracted increasing attention. Pyrolysis technology has advantages such as wide adaptability of raw materials, short treatment cycle, high conversion rate, and the ability to curb the generation of toxic and harmful substances such as dioxins. It can also produce specific products while treating waste in a harmless manner, making it a highly efficient method for treating organic solid waste.

[0003] Solid waste pyrolysis devices generate a large amount of heat during operation. If this heat is not recycled, it will result in a significant waste of thermal energy. Existing solid waste pyrolysis devices limit the use of waste heat to external applications, such as heating hot water, but cannot reuse it for preheating raw materials and intake air within the solid waste pyrolysis device. This results in a waste of heat and increases pyrolysis energy consumption. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a solid waste pyrolysis device that utilizes waste heat recycling, which effectively solves the problem that existing solid waste pyrolysis devices cannot recycle waste heat.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a solid waste pyrolysis device utilizing waste heat circulation heating, comprising a pyrolysis furnace, a crushed material feeding channel fixedly installed at the top of the pyrolysis furnace, a crushed material preheating and conveying mechanism fixedly installed at the top of the crushed material feeding channel, a crushing chamber fixedly installed at one end of the top of the crushed material preheating and conveying mechanism, a crushing driver fixedly installed on the front of the crushing chamber, a crushing roller assembly movably installed inside the crushing chamber and fixedly connected to the output shaft of the crushing driver, a feeding conveyor belt and a gas collecting hood installed at the top of the crushing chamber, a gas collecting chamber fixedly installed at one end of the bottom of the crushed material preheating and conveying mechanism, a gas guide pipe fixedly installed at the bottom of the gas collecting chamber, a heat insulation shell fixedly installed at the bottom of the gas guide pipe, a tubular heat exchanger fixedly installed inside the heat insulation shell, an exhaust pipe fixedly installed at one end of the bottom of the tubular heat exchanger, a flue gas processor fixedly installed at the other end of the exhaust pipe, and a return gas pipe connecting the flue gas processor and the gas collecting hood.

[0006] Preferably, a partition plate is fixedly installed in the middle of the material feeding channel. The vertical cross-section of the partition plate is a right-angled triangle structure. The two sides of the partition plate and the material feeding channel respectively form a raw material feeding chamber and a flue gas discharge chamber. A material discharge and exhaust port communicating with the raw material feeding chamber and the flue gas discharge chamber is opened in the middle of the top of the pyrolysis furnace. The raw material feeding chamber, the flue gas discharge chamber, the crushing chamber and the gas collection chamber are all connected to the material preheating and transmission mechanism.

[0007] Preferably, one side of the raw material feeding chamber has an arc-shaped structure, and a uniform speed feeding roller is movably arranged inside the raw material feeding chamber. A feeding channel is formed between the uniform speed feeding roller and the partition plate. A feeding motor that is fixedly connected to the uniform speed feeding roller is fixedly arranged at one end of the crushed material feeding channel. A guide fan is fixedly arranged inside the flue gas discharge chamber.

[0008] Preferably, the material preheating and conveying mechanism comprises a heat-insulating sleeve, a heat-conducting metal shell, a first material conveyor belt, a second material conveyor belt, a first material preheating component, and a second material preheating component. The heat-insulating sleeve is fixedly connected to the outer surface of the heat-conducting metal shell. The interior of the heat-conducting metal shell is provided with a feeding chamber that matches the first and second material conveyor belts. The first and second material conveyor belts are respectively connected to the top and bottom of the feeding chamber. The ends of the first and second material conveyor belts near the crushing chamber are staggered. The first material preheating component is located at the top of the first material conveyor belt and is fixedly connected to the heat-conducting metal shell. The second material preheating component is located at the top of the second material conveyor belt and is fixedly connected to the heat-conducting metal shell.

[0009] Preferably, a preheating air inlet chamber communicating with the flue gas discharge chamber is opened on one side of the interior of the thermally conductive metal shell, a preheating exhaust chamber is opened on the other side of the interior of the thermally conductive metal shell, a plurality of preheating internal through holes I communicating with the preheating air inlet chamber and the preheating exhaust chamber are opened at the top of the interior of the thermally conductive metal shell, and a plurality of preheating internal through holes II communicating with the preheating air inlet chamber and the preheating exhaust chamber are opened at the bottom of the interior of the thermally conductive metal shell.

[0010] Preferably, both the raw material preheating component one and the raw material preheating component two are composed of a heat-conducting plate and several heat-conducting fins. The heat-conducting plate is fixedly connected to the heat-conducting metal shell, and the heat-conducting fins are fixedly connected to the bottom end of the heat-conducting plate. Several preheating internal through holes three are opened inside the heat-conducting plate and communicate with the preheating air inlet chamber and the preheating exhaust chamber.

[0011] Preferably, the tubular heat exchanger comprises a heat exchanger shell, a hot air inlet, a hot air outlet, a cold water inlet, a hot water outlet, several heat exchange tubes, several heat exchange plates, an air inlet pipe, several air preheating pipes, and an air outlet pipe. The interior of the heat exchanger shell forms a hot air distribution chamber, a hot air confluence chamber, and a heat exchange chamber. The heat exchange tubes pass through and connect the hot air distribution chamber, the hot air confluence chamber, and the heat exchange chamber. The two ends of the heat exchange tubes are respectively connected to the hot air distribution chamber and the hot air confluence chamber. The heat exchange plates are sleeved on the heat exchange tubes. The cold water inlet and the hot water outlet are both connected to the heat exchange chamber. The air preheating pipes are inserted through the heat exchange plates. The air inlet pipes and the air outlet pipes are respectively connected to the two ends of the air preheating pipes and are inserted through the heat exchanger shell.

[0012] Preferably, the hot gas distribution cavity, the hot gas confluence cavity, and the heat exchange cavity are relatively sealed structures, with the hot gas inlet and the hot gas outlet located diagonally opposite each other on the outer surface of the heat exchanger shell, and the cold water inlet and the hot water outlet located diagonally opposite each other on the outer surface of the heat exchanger shell.

[0013] Preferably, an air intake fan is fixedly installed at the top of the air intake pipe, located at the top of the heat exchanger shell, and the exhaust pipe is connected between the hot gas outlet and the flue gas processor. An air intake duct is fixedly installed at the bottom of one side of the pyrolysis furnace, passing through the exhaust pipe. An air intake fan is fixedly installed at one end of the air intake duct. The air outlet pipe is fixedly connected to the air intake duct through the air intake duct.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] (1) In operation, by setting up a pulverized material preheating and transmission mechanism consisting of a heat insulation sleeve, a heat-conducting metal shell, a raw material conveyor belt one, a raw material conveyor belt two, a raw material preheating component one and a raw material preheating component two, it is possible to quickly preheat the pulverized pyrolysis raw material, so that the raw material enters the interior of the pyrolysis furnace at a high temperature, thereby reducing the pyrolysis time of the raw material, realizing the utilization of waste heat, and achieving the purpose of saving energy.

[0016] (2) By setting up a tubular heat exchanger consisting of a heat exchanger shell, hot air inlet, hot air outlet, cold water inlet, hot water outlet, several heat exchange tubes, several heat exchange plates, air inlet pipe, several air preheating pipes and air outlet pipe, the waste heat can be reused to heat domestic hot water and preheat the inlet air, so that the air enters the interior of the pyrolysis furnace at a high temperature, further realizing the energy-saving effect. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0018] In the attached diagram:

[0019] Figure 1 This is a schematic diagram of the solid waste pyrolysis device that utilizes waste heat recycling for heating according to the present invention;

[0020] Figure 2 This is a partial side cross-sectional view of the solid waste pyrolysis device that utilizes waste heat recycling for heating according to the present invention;

[0021] Figure 3 This is a front sectional view of the preheating and conveying mechanism for crushed materials according to the present invention;

[0022] Figure 4 This is a side sectional view of the preheating and conveying mechanism for crushed materials according to the present invention;

[0023] Figure 5 This is a partial structural diagram of the preheating and conveying mechanism for crushed materials according to the present invention;

[0024] Figure 6 This is a partial structural diagram of the raw material preheating component of the present invention;

[0025] Figure 7 This is a cross-sectional view of the tubular heat exchanger of the present invention;

[0026] In the diagram: 1. Pyrolysis furnace; 2. Crushed material feeding channel; 3. Crushed material preheating and transmission mechanism; 4. Crushing chamber; 5. Crushing driver; 6. Crushing roller assembly; 7. Feed conveyor belt; 8. Gas collection hood; 9. Gas collection chamber; 10. Gas guide pipe; 11. Insulation shell; 12. Tubular heat exchanger; 13. Exhaust pipe; 14. Flue gas processor; 15. Return gas pipe; 16. Partition plate; 17. Raw material feeding chamber; 18. Flue gas discharge chamber; 19. Feeding exhaust port; 20. Uniform speed feeding roller; 21. Feeding trough; 22. Feeding motor; 23. Guide fan; 24. Insulation sleeve; 25. Thermally conductive metal shell; 26. Raw material conveyor belt one; 27. Raw material conveyor belt two; 28. Raw material preheating and transmission mechanism. 29. Heat exchanger assembly 1; 30. Raw material preheating assembly 2; 31. Feeding chamber; 32. Preheating air inlet chamber; 33. Preheating exhaust chamber; 34. Preheating internal through hole 1; 35. Preheating internal through hole 2; 36. Heat-conducting plate; 37. Heat-conducting fins; 38. Preheating internal through hole 3; 39. Heat exchanger shell; 40. Hot air inlet; 41. Hot air outlet; 42. Cold water inlet; 43. Hot water outlet; 44. Heat exchange tube; 45. Heat exchange plate; 46. Air inlet pipe; 47. Air preheating pipe; 48. Air outlet pipe; 49. Hot air distribution chamber; 50. Hot air confluence chamber; 51. Heat inlet fan 1; 52. Air inlet duct 1; 53. Heat inlet fan 2; 54. Air inlet duct 2. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] Example 1, by Figure 1 and Figure 2 The present invention discloses a solid waste pyrolysis device utilizing waste heat circulation heating, comprising a pyrolysis furnace 1, a crushed material feeding channel 2 fixedly installed at the top of the pyrolysis furnace 1, a crushed material preheating and conveying mechanism 3 fixedly installed at the top of the crushed material feeding channel 2, a crushing chamber 4 fixedly installed at one end of the top of the crushed material preheating and conveying mechanism 3, a crushing driver 5 fixedly installed on the front of the crushing chamber 4, a crushing roller group 6 movably installed inside the crushing chamber 4 and fixedly connected to the output shaft of the crushing driver 5, a feeding conveyor belt 7 and a gas collecting hood 8 installed at the top of the crushing chamber 4, a gas collecting chamber 9 fixedly installed at one end of the bottom of the crushed material preheating and conveying mechanism 3, a gas guide pipe 10 fixedly installed at the bottom of the gas collecting chamber 9, a heat insulation shell 11 fixedly installed at the bottom of the gas guide pipe 10, a tubular heat exchanger 12 fixedly installed inside the heat insulation shell 11, an exhaust pipe 13 fixedly installed at one end of the bottom of the tubular heat exchanger 12, a flue gas processor 14 fixedly installed at the other end of the exhaust pipe 13, and a flue gas processor 14 connected to the gas collecting hood 8 via a return gas pipe 15.

[0029] Raw materials enter the crushing chamber 4 through the feeding conveyor belt 7. The crushing driver 5 drives the crushing roller group 6 to work, thereby crushing the pyrolysis raw materials. The crushed raw materials enter the crushed material preheating and transmission mechanism 3 to preheat the raw materials, so that the raw materials enter the pyrolysis furnace 1 at a high temperature. The flue gas after the raw materials are preheated enters the tubular heat exchanger 12 to preheat the intake air and heat the domestic water, thereby realizing the effective utilization of waste heat and reducing the energy consumption of the pyrolysis device.

[0030] Example 2, by Figure 1 and Figure 2As shown, a partition plate 16 is fixedly installed in the middle of the material feeding channel 2. The vertical cross section of the partition plate 16 is a right-angled triangle structure. The two sides of the partition plate 16 and the material feeding channel 2 respectively form a raw material feeding chamber 17 and a flue gas discharge chamber 18. A material discharge vent 19 is opened in the middle of the top of the pyrolysis furnace 1, which is connected to the raw material feeding chamber 17 and the flue gas discharge chamber 18. The raw material feeding chamber 17, the flue gas discharge chamber 18, the crushing chamber 4 and the gas collection chamber 9 are all connected to the material preheating and transmission mechanism 3. One side of the raw material feeding chamber 17 has an arc-shaped structure. A uniform speed feeding roller 20 is movably installed inside the raw material feeding chamber 17. A feeding channel 21 is formed between the uniform speed feeding roller 20 and the partition plate 16. A feeding motor 22 is fixedly installed at one end of the material feeding channel 2 and is fixedly connected to the uniform speed feeding roller 20. A guide fan 23 is fixedly installed inside the flue gas discharge chamber 18.

[0031] The raw material enters the pyrolysis furnace 1 through the raw material feeding chamber 17. At the same time, the hot gas inside the pyrolysis furnace 1 enters the crushed material preheating and conveying mechanism 3 through the flue gas discharge chamber 18. The uniform feeding roller 20 can achieve uniform feeding and accumulate the raw material, preventing a large amount of hot gas from being discharged from the raw material feeding chamber 17. The guide fan 23 guides the hot gas, so that most of the hot gas is discharged through the flue gas discharge chamber 18. The feeding and exhaust can be carried out simultaneously without affecting each other.

[0032] Example 3, by Figures 1 to 6The material preheating and conveying mechanism 3 is composed of a heat insulation sleeve 24, a heat-conducting metal shell 25, a first material conveyor belt 26, a second material conveyor belt 27, a first material preheating component 28, and a second material preheating component 29. The heat insulation sleeve 24 is fixedly connected to the outer surface of the heat-conducting metal shell 25. The heat-conducting metal shell 25 has a feeding chamber 30 that matches the first material conveyor belt 26 and the second material conveyor belt 27. The first material conveyor belt 26 and the second material conveyor belt 27 are respectively connected to the top and bottom of the feeding chamber 30. The ends of the first material conveyor belt 26 and the second material conveyor belt 27 near the crushing chamber 4 are staggered. The first material preheating component 28 is located on top of the first material conveyor belt 26 and is fixedly connected to the heat-conducting metal shell 25. The second material preheating component 29 is located on top of the second material conveyor belt 27 and is fixedly connected to the heat-conducting metal shell 25. Next, a preheating air inlet chamber 31 communicating with the flue gas discharge chamber 18 is opened on one side of the interior of the heat-conducting metal shell 25, and a preheating exhaust chamber 32 is opened on the other side of the interior of the heat-conducting metal shell 25. Several preheating internal through holes 33 communicating with the preheating air inlet chamber 31 and the preheating exhaust chamber 32 are opened at the top of the interior of the heat-conducting metal shell 25, and several preheating internal through holes 34 communicating with the preheating air inlet chamber 31 and the preheating exhaust chamber 32 are opened at the bottom of the interior of the heat-conducting metal shell 25. The raw material preheating component 28 and the raw material preheating component 29 are both composed of a heat-conducting plate 35 and several heat-conducting fins 36. The heat-conducting plate 35 is fixedly connected to the heat-conducting metal shell 25, and the heat-conducting fins 36 are fixedly connected to the bottom of the heat-conducting plate 35. Several preheating internal through holes 37 communicating with the preheating air inlet chamber 31 and the preheating exhaust chamber 32 are opened inside the heat-conducting plate 35.

[0033] Hot air enters the preheating air inlet chamber 31, where it is split and enters the preheating inner through-hole 1 33, preheating inner through-hole 2 34, and preheating inner through-hole 37 respectively. The hot air in the preheating inner through-hole 1 33 and preheating inner through-hole 2 34 heats the heat-conducting metal shell 25, while the preheating inner through-hole 37 heats the heat-conducting plate 35 and heat-conducting fins 36. At this time, the entire interior of the heat-conducting metal shell 25 is in a high-temperature state. The raw material is simultaneously conveyed by the raw material conveyor belt 1 26 and raw material conveyor belt 2 27, keeping the raw material in a high-temperature environment, thereby heating the raw material. At the same time, the hot air is prevented from contacting the raw material, thus avoiding any impact on the raw material and preventing the loss of hot air.

[0034] Example 4, by Figures 1 to 7As shown, the tubular heat exchanger 12 consists of a heat exchanger shell 38, a hot air inlet 39, a hot air outlet 40, a cold water inlet 41, a hot water outlet 42, several heat exchange tubes 43, several heat exchange plates 44, an air inlet pipe 45, several air preheating pipes 46, and an air outlet pipe 47. The interior of the heat exchanger shell 38 forms a hot air distribution chamber 48, a hot air confluence chamber 49, and a heat exchange chamber 50. The heat exchange tubes 43 pass through and connect to the hot air distribution chamber 48, the hot air confluence chamber 49, and the heat exchange chamber 50, with both ends of the heat exchange tubes 43 connected to the hot air distribution chamber 48 and the hot air confluence chamber 49, respectively. The heat exchange plates 44 are fitted onto the heat exchange tubes 43. The cold water inlet 41 and the hot water outlet 42 are both connected to the heat exchange chamber 50. The air preheating pipes 46 are inserted through the heat exchange plates 44. The air inlet pipe 45 and the air outlet pipe 47 are respectively connected to the air preheating pipes 46 and 47. The two ends of the heat pipe 46 are inserted into the heat exchanger shell 38. The hot gas distribution chamber 48, the hot gas junction chamber 49 and the heat exchange chamber 50 are relatively sealed structures. The hot gas inlet 39 and the hot gas outlet 40 are located diagonally opposite each other on the outer surface of the heat exchanger shell 38. The cold water inlet 41 and the hot water outlet 42 are located diagonally opposite each other on the outer surface of the heat exchanger shell 38. An air intake fan 51 is fixedly installed at the top of the air intake pipe 45, located at the top of the heat exchanger shell 38. The exhaust pipe 13 is connected between the hot gas outlet 40 and the flue gas processor 14. An air intake duct 52 is fixedly installed at the bottom of one side of the pyrolysis furnace 1, which is inserted into the exhaust pipe 13. An air intake fan 53 is fixedly installed at one end of the air intake duct 52. The air outlet pipe 47 is fixedly connected to the air intake duct 52 through the air intake duct 54.

[0035] Hot air exits from the preheating and transmission mechanism 3 and enters the gas collecting chamber 9 and the gas guide pipe 10. It then flows along the gas guide pipe 10 into the tubular heat exchanger 12. The hot air enters the hot air distribution chamber 48 from the hot air inlet 39, where it is distributed. The hot air then enters multiple heat exchange tubes 43 and flows along the heat exchange tubes 43 into the hot air confluence chamber 49. Finally, it exits from the hot air outlet 40. As the hot air passes through the heat exchange tubes 43, it exchanges heat with the heat exchange plates 44. Cold water enters the heat exchange chamber 50 from the cold water inlet 41 and fills the chamber, thus heating the domestic water. Air enters through the air inlet pipe 45 and is then distributed... The air does not enter the interior of multiple air preheating pipes 46. The air inside the air preheating pipes 46 is preheated through heat exchange fins 44. Finally, the air is discharged from the air outlet pipe 47 into the interior of the second air inlet duct 54. At the same time, the air supplied by the second air inlet fan 53 enters the interior of the first air inlet duct 52. The second air inlet duct 54 is connected to the first air inlet duct 52. In actual use, the first air inlet duct 52 and the second air inlet duct 54 can be opened at the same time, or one of them can be opened alone. The heated air enters the interior of the pyrolysis furnace 1, which further realizes the function of saving energy consumption. Finally, the flue gas is discharged into the interior of the flue gas processor 14.

[0036] In operation, by setting up a preheating and conveying mechanism for the crushed material, consisting of a heat-insulating jacket, a heat-conducting metal shell, a first raw material conveyor belt, a second raw material conveyor belt, a first raw material preheating component, and a second raw material preheating component, the crushed pyrolysis raw material can be rapidly preheated, allowing the raw material to enter the pyrolysis furnace at a high temperature. This reduces the pyrolysis time, realizes waste heat utilization, and achieves energy conservation. By setting up a tubular heat exchanger consisting of a heat exchanger shell, a hot air inlet, a hot air outlet, a cold water inlet, a hot water outlet, several heat exchange tubes, several heat exchange plates, an air inlet pipe, several air preheating pipes, and an air outlet pipe, the waste heat can be reused to heat domestic hot water and preheat the incoming air, allowing the air to enter the pyrolysis furnace at a high temperature, further achieving energy-saving effects.

Claims

1. A solid waste pyrolysis device utilizing waste heat recycling, comprising a pyrolysis furnace (1), characterized in that: The top of the pyrolysis furnace (1) is fixedly provided with a crushed material feeding channel (2), and the top of the crushed material feeding channel (2) is fixedly provided with a crushed material preheating and transmission mechanism (3). One end of the top of the crushed material preheating and transmission mechanism (3) is fixedly provided with a crushing chamber (4). The front of the crushing chamber (4) is fixedly provided with a crushing driver (5). The crushing chamber (4) is movably provided with a crushing roller group (6) fixedly connected to the output shaft of the crushing driver (5). The top of the crushing chamber (4) is provided with a feeding conveyor belt (7) and a gas collecting hood (8). A gas collection chamber (9) is fixedly installed at one end of the bottom of the heat transfer mechanism (3). A gas guide pipe (10) is fixedly installed at the bottom of the gas collection chamber (9). A heat insulation shell (11) is fixedly installed at the bottom of the gas guide pipe (10). A tubular heat exchanger (12) is fixedly installed inside the heat insulation shell (11). An exhaust pipe (13) is fixedly installed at one end of the bottom of the tubular heat exchanger (12). A flue gas processor (14) is fixedly installed at the other end of the exhaust pipe (13). The flue gas processor (14) is connected to the gas collection hood (8) through a return gas pipe (15). A partition plate (16) is fixedly installed in the middle of the crushed material feeding channel (2). The vertical section of the partition plate (16) is a right-angled triangle structure. The two sides of the partition plate (16) and the crushed material feeding channel (2) respectively form a raw material feeding chamber (17) and a flue gas discharge chamber (18). A material discharge vent (19) is opened in the middle of the top of the pyrolysis furnace (1) and communicates with the raw material feeding chamber (17) and the flue gas discharge chamber (18). The raw material feeding chamber (17), the flue gas discharge chamber (18), the crushing chamber (4) and the gas collection chamber (9) are all connected to the crushed material preheating and transmission mechanism (3). One side of the raw material feeding chamber (17) has an arc-shaped structure. A uniform speed feeding roller (20) is movably installed inside the raw material feeding chamber (17). A feeding channel (21) is formed between the uniform speed feeding roller (20) and the partition plate (16). A feeding motor (22) is fixedly installed at one end of the crushed material feeding channel (2) and is fixedly connected to the uniform speed feeding roller (20). A guide fan (23) is fixedly installed inside the flue gas discharge chamber (18). The preheating and conveying mechanism (3) for crushed materials consists of a heat insulation sleeve (24), a heat-conducting metal shell (25), a first raw material conveyor belt (26), a second raw material conveyor belt (27), a first raw material preheating component (28), and a second raw material preheating component (29). The heat insulation sleeve (24) is fixedly connected to the outer surface of the heat-conducting metal shell (25). The interior of the heat-conducting metal shell (25) is provided with a feeding chamber (30) that matches the first raw material conveyor belt (26) and the second raw material conveyor belt (27). The first (26) and the second (27) of the raw material conveyor belt are respectively connected to the top and bottom of the feeding chamber (30). The first (26) and the second (27) of the raw material conveyor belt are staggered at the end near the crushing chamber (4). The first (28) of the raw material preheating component is located on the top of the first (26) of the raw material conveyor belt and is fixedly connected to the heat-conducting metal shell (25). The second (29) of the raw material preheating component is located on the top of the second (27) of the raw material conveyor belt and is fixedly connected to the heat-conducting metal shell (25). A preheating air inlet chamber (31) communicating with the flue gas discharge chamber (18) is provided on one side of the interior of the thermally conductive metal shell (25), and a preheating exhaust chamber (32) is provided on the other side of the interior of the thermally conductive metal shell (25). Several preheating internal through holes I (33) communicating with the preheating air inlet chamber (31) and the preheating exhaust chamber (32) are provided at the top of the interior of the thermally conductive metal shell (25), and several preheating internal through holes II (34) communicating with the preheating air inlet chamber (31) and the preheating exhaust chamber (32) are provided at the bottom of the interior of the thermally conductive metal shell (25). Both the raw material preheating assembly one (28) and the raw material preheating assembly two (29) are composed of a heat-conducting plate (35) and several heat-conducting fins (36). The heat-conducting plate (35) is fixedly connected to the heat-conducting metal shell (25), and the heat-conducting fins (36) are fixedly connected to the bottom end of the heat-conducting plate (35). Several preheating internal through holes three (37) are opened inside the heat-conducting plate (35) and communicate with the preheating air inlet chamber (31) and the preheating exhaust chamber (32).

2. The solid waste pyrolysis device utilizing waste heat recycling for heating according to claim 1, characterized in that: The tubular heat exchanger (12) consists of a heat exchanger shell (38), a hot air inlet (39), a hot air outlet (40), a cold water inlet (41), a hot water outlet (42), several heat exchange tubes (43), several heat exchange plates (44), an air inlet pipe (45), several air preheating pipes (46), and an air outlet pipe (47). The interior of the heat exchanger shell (38) forms a hot air distribution chamber (48), a hot air confluence chamber (49), and a heat exchange chamber (50). The heat exchange tubes (43) are connected through the hot air distribution chamber (49). 8) Hot gas junction cavity (49) and heat exchange cavity (50), the two ends of heat exchange tube (43) are connected to hot gas distribution cavity (48) and hot gas junction cavity (49) respectively, heat exchange plate (44) is sleeved on heat exchange tube (43), cold water inlet (41) and hot water outlet (42) are connected to heat exchange cavity (50), air preheating tube (46) is inserted through heat exchange plate (44), air inlet pipe (45) and air outlet pipe (47) are connected to the two ends of air preheating tube (46) respectively and inserted through heat exchanger shell (38).

3. A solid waste pyrolysis device utilizing waste heat recycling for heating according to claim 2, characterized in that: The hot gas diversion chamber (48), hot gas confluence chamber (49) and heat exchange chamber (50) are relatively sealed structures. The hot gas inlet (39) and hot gas outlet (40) are located diagonally opposite each other on the outer surface of the heat exchanger shell (38), and the cold water inlet (41) and hot water outlet (42) are located diagonally opposite each other on the outer surface of the heat exchanger shell (38).

4. A solid waste pyrolysis device utilizing waste heat recycling for heating according to claim 2, characterized in that: The top end of the air intake pipe (45) is fixedly provided with an intake fan (51) located at the top of the heat exchanger shell (38). The exhaust pipe (13) is connected between the hot gas outlet (40) and the flue gas processor (14). The bottom end of one side of the pyrolysis furnace (1) is fixedly provided with an air intake duct (52) inserted through the exhaust pipe (13). One end of the air intake duct (52) is fixedly provided with an intake fan (53). The air outlet pipe (47) and the air intake duct (52) are fixedly connected through the air intake duct (54).

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