Hazardous waste rotary incineration treatment system and treatment method thereof

Abstract

The invention discloses a hazardous waste rotary incineration treatment system and a treatment method thereof, and relates to the technical field of hazardous waste treatment.The system comprises a hopper and a mixer, a pair of coarse material augers are arranged in a mixing box in the mixer, a settling box is arranged at the bottom of the mixer, a pair of fine material augers are arranged in the settling box, and a partition plate is located between the mixing box and the settling box; the mixing box is provided with a coarse material outlet and a fine material backflow port, the settling box is provided with a fine material outlet and is communicated with the fine material backflow port through a fine material backflow pipe, and the mixing box is further provided with a tackifying device. By means of the system, in the mixing, crushing and conveying processes of waste, fine materials are mixed with coarse materials again after being mixed and crushed for multiple times, the fine materials are tackified through a mixture of combustion liquid and mucus, the combination stability of the fine materials and the coarse materials is improved, and the stability and safety in the subsequent conveying process are ensured.

Description

Technical Field

[0001] The present application relates to the field of waste incineration treatment, and in particular to a hazardous waste rotary incineration treatment system and a treatment method thereof. Background Art

[0002] Rotary incineration is a high-temperature thermal treatment technology for waste, which is widely used in the harmless treatment of hazardous waste. This technology effectively reduces the emission of toxic and harmful substances and achieves safe disposal of waste by oxidizing, pyrolyzing and destroying waste at high temperatures of 800-1200°C. Rotary incineration can not only efficiently treat various types of waste, but also reduce environmental pollution, which meets the requirements of modern environmental protection. In addition, this technology has a wide range of applications and is suitable for the treatment of various hazardous wastes such as medical waste and industrial waste, and has important social and economic value.

[0003] In practical applications, in order to ensure the complete incineration of waste, it is usually necessary to pre-treat it. A common pre-treatment method is to first transport waste from different sources to a mixer, use the mixer to mix and crush various wastes, and then transport them to a high-temperature silo. Subsequently, the waste enters the rotary kiln through a feeder for incineration. In this process, the end of the rotary kiln is connected to a dust collection device, a desulfurization device, and a smoke exhaust device to ensure the harmless treatment of exhaust gas. The mixer is one of the key equipment in this process, responsible for evenly mixing various wastes to ensure the effect of subsequent incineration.

[0004] However, the existing mixer design has some shortcomings. Specifically, the mixer is usually equipped with a pair of spiral conveying dragons, which cooperate with each other to complete the mixing, crushing and transportation of waste. However, during the crushing process, materials of different particle sizes will be produced, among which fine materials are easily deposited at the bottom of the mixer and cannot be transported with the coarse materials in time. This not only leads to the accumulation of fine materials, but also may cause fine materials to fall at some exposed transfer nodes, affecting the overall processing efficiency and environmental safety. Therefore, how to effectively solve the problem of conveying fine materials is a key technical problem that needs to be solved urgently. Summary of the invention

[0005] In order to improve the stability and timeliness of the fine material transportation process, the present application provides a hazardous waste rotary incineration treatment system and a treatment method thereof.

[0006] In the first aspect, the present application provides a hazardous waste rotary incineration treatment system adopting the following technical solutions: A hazardous waste rotary incineration treatment system includes a hopper and a mixer, the hopper is located above the mixer and is connected to the mixer, the mixer includes a mixing box, a pair of coarse material dragons are arranged inside the mixing box, a connected sedimentation box is arranged at the bottom of the mixing box, a pair of fine material dragons are arranged in the sedimentation box, a partition is arranged between the sedimentation box and the mixing box, the partition is located on the side close to the tail end of the conveying direction, the mixing box is provided with a coarse material outlet and a fine material reflux port, the fine material reflux port is arranged at the top of the mixing box, the sedimentation box is provided with a fine material outlet, the fine material outlet is connected to the fine material reflux port through a fine material reflux pipe, and a viscosity increasing device for increasing the viscosity of the fine material is provided at the fine material reflux port of the mixing box.

[0007] By adopting the above technical scheme, the fine material dragon can re-mix, crush and convey the fine material settled below to further reduce the particle size. Finally, the refined fine material enters the mixing box from the top along the fine material reflux pipe to be mixed with the coarse material again. Before mixing, the surface of the fine material is treated by a viscosity increasing device to make the fine material that finally falls have viscosity, so that it can bond with the coarse material, so that the stability of the fine material can be improved during the subsequent transportation process.

[0008] Preferably, the partition includes a fixed plate and a movable plate, the fixed plate is fixedly connected to the mixing box, the movable plate is slidably connected to the fixed plate, and the fixed plate is connected to an adjustment drive assembly for driving the movable plate to extend and retract to adjust the size of the connection area between the mixing box and the sedimentation box.

[0009] By adopting the above technical solution, the sliding connection between the movable plate and the fixed plate and the setting of the adjustable drive assembly, the partition can flexibly adjust the size of the connecting area between the mixing box and the sedimentation box according to actual needs. This not only helps to optimize the separation and remixing process of fine materials, but also effectively avoids the problem of excessive accumulation or poor transportation of fine materials, thereby improving the stability and efficiency of the entire system. Specifically, the telescopic adjustment function of the movable plate can be adaptively adjusted according to the characteristics of different types of waste, ensuring that the fine materials can smoothly enter the sedimentation box for secondary treatment, while reducing the retention time of fine materials in the mixing box, thereby improving the transportation stability of fine materials.

[0010] Preferably, the adjustment drive assembly includes an adjustment sleeve, an adjustment rod and an adjustment drive member, the adjustment sleeve is connected to the movable plate, the adjustment rod is rotatably connected to the fixed plate, the adjustment rod is threadedly connected to the adjustment sleeve, and the adjustment drive member is connected to the mixing box and is used to drive the adjustment rod to rotate.

[0011] By adopting the above technical solution, the adjustment drive assembly can accurately control the extension and retraction of the movable plate, thereby flexibly adjusting the size of the connection area between the mixing box and the sedimentation box, effectively preventing excessive accumulation or loss of fine materials during the mixing process, and improving the transportation stability of fine materials and the overall operation efficiency of the system. Specifically, the adjustment sleeve is connected to the movable plate, the adjustment rod is rotatably connected to the fixed plate and the adjustment sleeve is connected by threads, so that the adjustment drive can drive the movable plate to slide along the fixed plate by driving the adjustment rod to rotate, thereby realizing accurate adjustment of the size of the connection area.

[0012] Preferably, the movable plate is provided with a support shaft, the inner side wall of the mixing box is provided with a support groove, and the support shaft is slidably connected to the support groove.

[0013] By adopting the above technical solution, the support shaft on the movable plate is slidably connected to the support groove on the inner wall of the mixing box, making the movable plate more stable during the adjustment process, avoiding the problem of unstable mixing caused by the shaking of the movable plate, and improving the operating reliability of the entire system.

[0014] Preferably, the viscosity increasing device comprises a liquid storage barrel, which is connected to a mixing box, and is connected to a nozzle which extends into the mixing box, and an outlet of the nozzle faces below a fine material return port to spray liquid on the falling fine material.

[0015] By adopting the above technical solution, the viscosity increasing device can effectively increase the viscosity of fine materials. Specifically, the liquid storage tank is connected to the mixing box, and the nozzle extends into the mixing box and is aimed at the bottom of the fine material return port to ensure that the fine material can be evenly sprayed with liquid when it falls. This design not only improves the viscosity of the fine material, making it easier to mix with the coarse material, but also enhances the stability of the fine material in the subsequent transportation process, avoids the problem of fine material falling during transportation, and improves the processing efficiency and reliability of the entire system.

[0016] Preferably, a mixture of fuel liquid and mucus is stored in the liquid storage barrel.

[0017] By adopting the above technical solution, a mixture of fuel liquid and mucus is stored in the liquid storage barrel, and the surface of the fine material can be sprayed during the reflux process to increase the viscosity and flammability of the fine material. This not only helps the fine material to be better mixed with the coarse material, reduces the flying and loss of the fine material during the transportation process, but also improves the combustion efficiency of the fine material and ensures the thoroughness and safety of the incineration treatment.

[0018] Preferably, a stirring shaft is rotatably arranged in the liquid storage barrel, a stirring rod is connected to the stirring shaft, and the liquid storage barrel is provided with a stirring driving member for driving the stirring shaft to rotate.

[0019] By adopting the above technical solution, the stirring shaft and stirring rod in the liquid storage barrel can rotate under the drive of the stirring drive component, effectively preventing the stratification of the fuel-liquid and viscous mixture when it is stationary, ensuring that the mixture is evenly distributed, thereby ensuring the stability and reliability of the fine material thickening effect.

[0020] Preferably, the nozzle is rotatably connected to the mixing box, the nozzle is connected to the liquid storage barrel via a hose, and the mixing box is provided with a swing component for driving the nozzle to swing.

[0021] By adopting the above technical solution, the nozzle is rotatably connected to the mixing box and connected to the liquid storage barrel through a hose. A swing assembly for driving the nozzle to swing is provided in the mixing box, which can enable the nozzle to swing and spray liquid below the fine material return port, thereby ensuring that the surface of the fine material is evenly coated with the thickener, further improving the bonding effect of the fine material and the coarse material, and enhancing the stability of the fine material in the subsequent transportation process.

[0022] Preferably, the swing assembly includes a swing gear, a swing gear rod and a swing driving member, the swing gear is connected to the nozzle, the swing gear rod is connected to the driving shaft of the swing driving member, the swing gear rod is meshed with the swing gear, and the swing driving member is connected to the mixing box and is used to drive the swing gear rod to reciprocate.

[0023] By adopting the above technical solution, the setting of the swing assembly enables the nozzle to swing, thereby expanding the spray range and ensuring that the fine material can be evenly sprayed with the mixture of fuel, liquid and mucus when entering the mixing box. This not only improves the viscosity-increasing effect of the fine material, but also enhances the adhesion between the fine material and the coarse material, further improving the stability and reliability of the fine material in the subsequent transportation process.

[0024] In the second aspect, the present application provides a method for rotary incineration of hazardous waste, which adopts the following technical solution: A method for rotary incineration treatment of hazardous waste, during which waste is mixed, crushed and transported in a mixing box, coarse material is mixed, crushed and transported along the mixing box, and fine material settled at the bottom of the mixing box is mixed and crushed again in a sedimentation box and finally transported to the top of the mixing box to be mixed with the coarse material again. During the remixing process, a mixture of fuel liquid and mucus is used to increase the viscosity of the fine material surface so that the remixed fine material can adhere to the surface of the coarse material, thereby having higher stability during the subsequent transportation process.

[0025] By adopting the above technical solution, the particle size of the fine material can be effectively reduced after the fine material is mixed and crushed again in the sedimentation box, ensuring that the fine material can smoothly return to the mixing box to mix with the coarse material. At the same time, during the reflux of the fine material, the mixture of fuel liquid and mucus is sprayed on the surface of the fine material through the viscosity increasing device, which enhances the viscosity of the fine material and enables it to better adhere to the surface of the coarse material during mixing, thereby improving the stability and uniformity of the fine material in the subsequent transportation process, avoiding the problem of fine material falling off or scattering during transportation, and improving the processing efficiency and reliability of the entire system.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The fine material is mixed, crushed and transported again in the sedimentation box by the fine material dragon, and finally re-enters the mixing box through the fine material reflux pipe to mix with the coarse material, which improves the transportation stability and uniformity of the fine material and avoids the accumulation and falling of the fine material during the transportation process.

[0027] 2. The viscosity increasing device sprays liquid on the falling fine material through a nozzle, making the surface of the fine material sticky and better bonded with the coarse material, thereby significantly improving the stability of the fine material during the subsequent transportation process and reducing the loss of fine material at the transfer node.

[0028] 3. The design of the partition allows the size of the connecting area between the mixing box and the sedimentation box to be adjusted, and the separation and recovery efficiency of fine materials can be adjusted according to actual needs, which improves the flexibility and adaptability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application; Figure 2 This is a structural schematic diagram for illustrating the connection relationship between the mixing box and the sedimentation box in the embodiment of the present application; Figure 3 This is a structural schematic diagram for illustrating the connection relationship between the fine material return pipe and the fine material return port in the embodiment of the present application; Figure 4 This is a structural schematic diagram for illustrating the connection relationship between the fixed plate and the movable plate in the embodiment of the present application; Figure 5 It is a structural schematic diagram used to illustrate the connection relationship between the swing assembly and the nozzle in the embodiment of the present application.

[0030] In the figure: 1. Hopper; 2. Mixer; 21. Mixing box; 210. Coarse material outlet; 22. Settling box; 220. Fine material outlet; 221. Fine material return pipe; 222. Fine material return port; 23. Coarse material dragon; 24. Fine material dragon; 25. Partition; 251. Fixed plate; 252. Movable plate; 261. Adjustment sleeve; 262. Adjustment rod; 263. Adjustment drive member; 27. Support shaft; 270. Support groove; 3. High temperature silo; 31. Feeder; 32. Rotary kiln; 4. viscosity increasing device; 41. liquid storage tank; 42. nozzle; 43. hose; 5. stirring shaft; 51. stirring rod; 52. stirring drive member; 6. Swing assembly; 61. Swing gear; 62. Swing gear rod; 63. Swing drive member. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. The described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can fully combine the embodiments of the present invention to obtain other embodiments without creative work, and these embodiments are also within the scope of protection of the present invention. The inventor of the present application found that the interior of the mixer in the related art is usually provided with a pair of spiral conveying dragons, and the two spiral conveying dragons cooperate with each other to achieve the mixing, crushing and transportation of waste. However, coarse materials and fine materials will be produced at the same time during the crushing process, and the fine materials are often deposited inside the mixer and cannot be transported backward with the coarse materials in time, or in the process of backward transportation, they often fall at a certain node of the turnover exposed to the air. For this reason, the present application mainly adopts the following technical solution of setting fine material dragons and viscosity-increasing devices to achieve the effect of improving the stability of fine material transportation. The present application is further described in detail below. Example

[0032] Reference Figure 1 The hazardous waste rotary incineration treatment system provided in the embodiment of the present application includes three hoppers 1 and a mixer 2. The three hoppers 1 are located above the mixer 2 and connected to the mixer 2. The mixer 2 is used to mix and crush various wastes and transport them to the subsequent high-temperature silo 3. Subsequently, the waste enters the rotary kiln 32 through the feeder 31 for incineration treatment. In this process, the end of the rotary kiln 32 is also connected to a dust collection device, a desulfurization device, a smoke exhaust device, etc. to ensure the harmless treatment of the exhaust gas.

[0033] Reference Figure 2The mixer 2 includes a square mixing box 21, the bottom of the inner chamber of the mixing box 21 is recessed downward to extend to form a sedimentation box 22, and the sedimentation box 22 is connected to the mixing box 21. A pair of coarse material dragons 23 are rotatably arranged inside the mixing box 21, and a pair of fine material dragons 24 are rotatably arranged inside the sedimentation box 22. The coarse material dragons 23 and the fine material dragons 24 are respectively driven to rotate, thereby mixing, crushing and conveying the coarse and fine materials respectively. Specifically, the coarse material dragon 23 includes a spiral dragon blade, which is made of stainless steel and has good wear resistance and corrosion resistance. The dragon blade is connected to the motor through a transmission shaft, and the motor can use a variable frequency motor to adjust the speed according to actual needs. The fine material dragon 24 also includes a spiral dragon blade, which is also made of stainless steel and is also connected to the motor through a transmission shaft. The dragon blade diameter of the fine material dragon 24 is smaller than that of the coarse material dragon 23 to adapt to the characteristics of the fine material. The dragon blades of the fine material dragon 24 can be made of different materials, such as stainless steel and carbon steel, to adapt to fine materials of different properties. A partition 25 is also provided between the sedimentation box 22 and the mixing box 21, and the partition 25 is located on one side close to the tail end of the conveying direction.

[0034] Reference Figure 3 and Figure 4 The mixing box 21 is provided with a coarse material outlet 210 and a fine material return port 222, the fine material return port 222 is provided at the top of the mixing box 21, the settling box 22 is provided with a fine material outlet 220, the fine material outlet 220 is connected to the fine material return port 222 through a fine material return pipe 221, and the mixing box 21 is provided with a viscosity increasing device 4 for increasing the viscosity of the fine material at the fine material return port 222. The system solves the problem of fine material deposition inside the mixer 2 by providing the fine material dragon 24 and the viscosity increasing device 4, improves the transportation stability of the fine material, and thus improves the processing efficiency of the entire system.

[0035] Reference Figure 2 and Figure 4The partition 25 includes a fixed plate 251 and a movable plate 252. The fixed plate 251 is fixedly connected to the mixing box 21. The movable plate 252 is slidably connected to the fixed plate 251. The fixed plate 251 is connected to an adjustment drive assembly for driving the movable plate 252 to extend and retract to adjust the size of the communicating area between the mixing box 21 and the sedimentation box 22, thereby achieving more precise zoning control. The adjustment drive assembly includes an adjustment sleeve 261, an adjustment rod 262 and an adjustment drive member 263. The adjustment sleeve 261 is connected to the movable plate 252. The adjustment rod 262 is rotatably connected to the fixed plate 251. The adjustment rod 262 is threadedly connected to the adjustment sleeve 261. The adjustment drive member 263 is connected to the mixing box 21 and is used to drive the adjustment rod 262 to rotate. The adjustment drive member 263 can be a hydraulic cylinder or a pneumatic cylinder to achieve rapid adjustment. The movable plate 252 is provided with a support shaft 27 , and the inner wall of the mixing box 21 is provided with a support groove 270 , and the support shaft 27 is slidably connected with the support groove 270 to ensure the smooth movement of the movable plate 252 .

[0036] Reference Figure 5 The viscosity increasing device 4 includes a liquid storage barrel 41, which is connected to the mixing box 21. The liquid storage barrel 41 is connected to a nozzle 42 and the nozzle 42 extends into the mixing box 21. The outlet of the nozzle 42 faces the bottom of the fine material return port 222 to spray the falling fine material. A mixture of fuel liquid and mucus is stored in the liquid storage barrel 41. The fuel liquid can be diesel or other flammable liquids, and the mucus can be polyacrylamide solution. Other additives such as defoamers and rust inhibitors can also be added to the liquid storage barrel 41 to further improve the performance of the mixture. A stirring shaft 5 is rotatably arranged in the liquid storage barrel 41, and the stirring shaft 5 is connected to a stirring rod 51. The liquid storage barrel 41 is provided with a stirring drive 52 for driving the stirring shaft 5 to rotate. The stirring drive 52 can be a motor to ensure the uniformity of the mixture. The nozzle 42 is rotatably connected to the mixing box 21, and the nozzle 42 is connected to the liquid storage barrel 41 through a hose 43. The mixing box 21 is provided with a swing component 6 for driving the nozzle 42 to swing.

[0037] Reference Figure 5 The swing assembly 6 includes a swing gear 61, a swing gear rod 62 and a swing driving member 63. The swing gear 61 is connected to the nozzle 42, the swing gear rod 62 is connected to the driving shaft of the swing driving member 63, the swing gear rod 62 is meshed with the swing gear 61, and the swing driving member 63 is connected to the mixing box 21 and is used to drive the swing gear rod 62 to reciprocate. The swing driving member 63 can use a stepping motor to achieve precise control or continuous swinging.

[0038] A filter screen may also be provided in the fine material return pipe 221 to filter out larger impurities and prevent clogging. An ultrasonic vibrator may also be provided in the mixing box 21 to assist in the mixing and crushing of waste. The ultrasonic vibrator may be provided at the bottom or side of the mixing box 21 to achieve omnidirectional vibration. An electromagnetic vibrator may be provided in the sedimentation box 22 to assist in the transportation of fine materials. A temperature sensor and a pressure sensor may also be provided in the mixing box 21 to monitor the temperature and pressure in the mixing box 21 in real time to ensure the normal operation of the system. A heating device may also be provided in the liquid storage barrel 41 to prevent the mixture from solidifying under low temperature conditions.

[0039] The implementation principle of this embodiment is as follows: by setting the fine material dragon 24 and the viscosity increasing device 4, the fine material is mixed again in the sedimentation box 22, crushed and transported to the top of the mixing box 21, and then the surface of the fine material is treated with viscosity increasing by the viscosity increasing device 4 to make it have a certain viscosity. In this way, the fine material can be mixed with the coarse material more stably in the subsequent transportation process, avoiding the deposition and falling of the fine material, and improving the processing efficiency and safety of the system. At the same time, by adjusting the drive assembly, the size of the connecting area between the mixing box 21 and the sedimentation box 22 can be flexibly adjusted to meet the needs under different working conditions, thereby enhancing the flexibility and applicability of the system. By setting multiple groups of fine material dragons 24 and multiple nozzles 42, the fluidity and uniformity of the fine material in the sedimentation box 22 are significantly improved, further reducing the deposition of fine material. The design of multiple groups of fine material dragons 24 can also improve the processing capacity of the system and adapt to larger-scale processing needs. By setting multiple partitions 25 and independently adjustable adjustment units, more sophisticated zoning control can be achieved, further improving the flexibility and adaptability of the system. By setting a temperature sensor and a pressure sensor, the state in the mixing box 21 can be monitored in real time to ensure the stable operation of the system. By setting a stirrer, more efficient mixing can be achieved to ensure uniform mixing of materials. The setting of a filter can effectively prevent the fine material return pipe 221 from being blocked, ensuring the stable operation of the system. By setting an ultrasonic vibrator and an electromagnetic vibrator, the mixing and crushing of materials can be effectively assisted, and the processing efficiency of the system can be improved. These improvement measures work together to further improve the performance and reliability of the system.

[0040] The hazardous waste rotary incineration treatment method provided in the embodiment of the present application comprises the following steps: S1, during the process of mixing, crushing and conveying the waste in the mixing box 21, the coarse material is mixed, crushed and conveyed along the mixing box 21, and the fine material settled at the bottom of the mixing box 21 is mixed again, crushed in the sedimentation box 22 and finally conveyed to the top of the mixing box 21 to be mixed with the coarse material again. During the re-mixing process, the mixture of fuel liquid and mucus is used to increase the viscosity of the fine material surface, so that the re-mixed fine material can adhere to the surface of the coarse material, thereby having higher stability in the subsequent conveying process.

[0041] S2, the fine material is mixed and crushed again by the fine material dragon 24. The dragon blades of the fine material dragon 24 can be made of stainless steel or carbon steel to adapt to fine materials of different properties. After being transported by the fine material dragon 24, the fine material is transported to the top of the mixing box 21 again through the fine material return pipe 221.

[0042] S3, a viscosity increasing device 4 is arranged at the fine material return port 222, and the viscosity increasing device 4 includes a liquid storage barrel 41, and a mixture of a fuel liquid and a mucus is stored in the liquid storage barrel 41. The fuel liquid can be diesel or other flammable liquids, and the mucus can be a polyacrylamide solution. A stirring shaft 5 and a stirring rod 51 are arranged in the liquid storage barrel 41, and the stirring shaft 5 is driven by a stirring driving member 52 to ensure the uniformity of the mixture. The nozzle 42 extends into the mixing box 21, and the outlet of the nozzle 42 faces the bottom of the fine material return port 222, and sprays the falling fine material to make it have a certain viscosity.

[0043] The implementation principle of this embodiment is as follows: by providing the fine material dragon 24 and the viscosity increasing device 4, the fine material is mixed again in the sedimentation box 22, crushed and transported to the top of the mixing box 21, and then the surface of the fine material is subjected to viscosity increasing treatment by the viscosity increasing device 4 to make it have a certain viscosity. In this way, the fine material can be mixed with the coarse material more stably in the subsequent transportation process, avoiding the deposition and falling of the fine material, and improving the processing efficiency and safety of the system.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A hazardous waste rotary incineration treatment system, comprising a hopper (1) and a mixer (2), wherein the hopper (1) is located above the mixer (2) and connected to the mixer (2), and the mixer (2) comprises a mixing box (21), characterized in that: A pair of coarse material dragons (23) are arranged inside the mixing box (21), a connected settling box (22) is arranged at the bottom of the mixing box (21), a pair of fine material dragons (24) are arranged in the settling box (22), a partition (25) is arranged between the settling box (22) and the mixing box (21), and the partition (25) is located on the side close to the tail end of the conveying direction, the mixing box (21) is provided with a coarse material outlet (210) and a fine material return port (222), the fine material return port (222) is arranged at the top of the mixing box (21), the settling box (22) is provided with a fine material outlet (220), and the fine material outlet (220) is connected to the fine material return port (222) through a fine material return pipe (221), and a viscosity increasing device (4) for increasing the viscosity of the fine material is arranged at the fine material return port (222) of the mixing box (21).

2. A hazardous waste rotary incineration treatment system according to claim 1, characterized in that: The partition (25) comprises a fixed plate (251) and a movable plate (252), wherein the fixed plate (251) is fixedly connected to the mixing box (21), and the movable plate (252) is slidably connected to the fixed plate (251), and the fixed plate (251) is connected to an adjustment drive component for driving the movable plate (252) to extend and retract so as to adjust the size of the connection area between the mixing box (21) and the sedimentation box (22).

3. A hazardous waste rotary incineration treatment system according to claim 2, characterized in that: The adjusting drive assembly comprises an adjusting sleeve (261), an adjusting rod (262) and an adjusting drive member (263); the adjusting sleeve (261) is connected to the movable plate (252); the adjusting rod (262) is rotatably connected to the fixed plate (251); the adjusting rod (262) is threadedly connected to the adjusting sleeve (261); and the adjusting drive member (263) is connected to the mixing box (21) and is used to drive the adjusting rod (262) to rotate.

4. A hazardous waste rotary incineration treatment system according to claim 2, characterized in that: The movable plate (252) is provided with a support shaft (27), the inner side wall of the mixing box (21) is provided with a support groove (270), and the support shaft (27) is slidably connected to the support groove (270).

5. The hazardous waste rotary incineration treatment system according to claim 1 is characterized by: The viscosity increasing device (4) comprises a liquid storage barrel (41), the liquid storage barrel (41) is connected to the mixing box (21), the liquid storage barrel (41) is connected to a nozzle (42) and the nozzle (42) extends into the interior of the mixing box (21), and the outlet of the nozzle (42) is directed toward the bottom of the fine material return port (222) to spray liquid on the falling fine material.

6. A hazardous waste rotary incineration treatment system according to claim 5, characterized in that: The liquid storage barrel (41) stores a mixture of fuel liquid and viscous liquid.

7. A hazardous waste rotary incineration treatment system according to claim 6, characterized in that: A stirring shaft (5) is rotatably arranged in the liquid storage barrel (41), the stirring shaft (5) is connected to a stirring rod (51), and the liquid storage barrel (41) is provided with a stirring driving member (52) for driving the stirring shaft (5) to rotate.

8. A hazardous waste rotary incineration treatment system according to claim 5, characterized in that: The nozzle (42) is rotatably connected to the mixing box (21), the nozzle (42) is connected to the liquid storage barrel (41) via a hose (43), and the mixing box (21) is provided with a swing component (6) for driving the nozzle (42) to swing.

9. A hazardous waste rotary incineration treatment system according to claim 8, characterized in that: The swing assembly (6) comprises a swing gear (61), a swing gear rod (62) and a swing driving member (63); the swing gear (61) is connected to the nozzle (42); the swing gear rod (62) is connected to a driving shaft of the swing driving member (63); the swing gear rod (62) is meshed with the swing gear (61); and the swing driving member (63) is connected to the mixing box (21) and is used to drive the swing gear rod (62) to reciprocate.

10. A method for treating hazardous waste by rotary incineration, characterized in that: During the process of mixing, crushing and conveying the waste in the mixing box (21), the coarse material is mixed, crushed and conveyed along the mixing box (21), and the fine material settled at the bottom of the mixing box (21) is mixed and crushed again in the sedimentation box (22) and finally conveyed to the top of the mixing box (21) to be mixed with the coarse material again. During the remixing process, the mixture of fuel and mucus is used to increase the viscosity of the surface of the fine material so that the remixed fine material can adhere to the surface of the coarse material, thereby having higher stability in the subsequent conveying process.

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