A thermal desorption device for soil contaminated with organic matter

Abstract

This invention discloses a thermal desorption device for organic-contaminated soil, belonging to the field of soil remediation technology. Its key technical features include: a main body that, through a pretreatment mechanism, raises the soil temperature, facilitates uniform heat transfer during thermal desorption, and breaks up falling soil to improve pollutant removal efficiency; a continuous turning thermal desorption mechanism enables continuous turning of the soil, increasing the overall thermal efficiency of the process and promoting the diffusion of volatile pollutants from the soil interior to the exterior, thus enhancing removal effectiveness; and a cooling discharge mechanism cools the output soil, reducing the damage to the bonding between soil particles caused by high temperatures, aiding in soil structure restoration and preservation, and providing favorable conditions for subsequent soil reuse. The device boasts advantages such as good pretreatment, effective thermal desorption, and convenient cooling.

Description

Technical Field

[0001] This invention relates to the field of soil remediation, specifically to a thermal desorption device for organic-contaminated soil. Background Technology

[0002] With rapid industrialization and urbanization, the problem of organic soil pollution has become increasingly prominent, posing a serious threat to human health and the ecological environment. These organic pollutants are typically characterized by high toxicity, recalcitrant degradation, and bioaccumulation. To effectively address this issue, thermal desorption technology, as a highly efficient and environmentally friendly soil remediation technique, has gradually gained widespread attention and application.

[0003] Thermal desorption equipment for organic-contaminated soil is a specialized technology for treating soil containing organic pollutants. It uses heating to convert organic pollutants in the soil from a solid or liquid state into a gaseous state. The gas is then collected by a specialized desorption system and further processed to purify the soil. Currently, conventional soil thermal desorption treatments often involve direct heating or introducing hot gas. However, direct heating or the introduction of hot gas cannot achieve good contact with the soil and requires insufficient pretreatment, resulting in poor desorption efficiency and failing to meet practical application requirements.

[0004] Therefore, there is a need to provide a thermal desorption device for soil contaminated with organic matter, which aims to solve the above problems. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a thermal desorption device for soil contaminated with organic matter, which aims to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A thermal desorption device for organic polluted soil includes a device body, a feed pipe for feeding material onto the device body, support feet for support at the bottom of the device body, a feed hopper for guiding material within the device body, and a conveying box connected to the bottom of the device body via a first feed pipe. The device also includes:

[0008] A pretreatment mechanism, installed inside the equipment body, is used to perform mixing, heating, crushing, and pretreatment on the incoming soil. The pretreatment mechanism includes a hollow rotating tube for heating and rotation control, a mixing rod and a scraper for mixing. The hollow rotating tube is provided with several air outlets for discharging hot air. The scraper is fixedly connected to the hollow rotating tube through the mixing rod, and the hollow rotating tube is connected to a hot air blower through a first connecting pipe. The hot air blower is fixedly installed on the equipment body.

[0009] The continuous turning and thermal desorption mechanism is installed inside the equipment body and located on one side of the guide hopper. It is used to continuously turn and thermally desorb the soil. The continuous turning and thermal desorption mechanism is driven by the pretreatment mechanism. The continuous turning and thermal desorption mechanism includes a first auger blade for continuous material conveying and a chain for driving the turning box to continuously turn the material. The turning box is installed on the chain, and the chain drive is connected to the inside of the equipment body.

[0010] A cooling discharge mechanism is installed inside the conveying box to cool and discharge the treated soil. The cooling discharge mechanism includes a water storage tank for circulating water cooling treatment, which is installed on one side of the conveying box.

[0011] As a further embodiment of the present invention, the pretreatment mechanism further includes a first motor for driving the hollow rotating tube to rotate. The hollow rotating tube is rotatably connected to the output shaft of the first motor through a bevel gear pair. The first motor is fixedly installed on the equipment body, and the hollow rotating tube is rotatably connected to a first connecting pipe. The first connecting pipe is connected to an air outlet pipe through a second connecting pipe, and the air outlet pipe extends into the interior of the equipment body.

[0012] As a further embodiment of the present invention, the pretreatment mechanism further includes a crushing blade for crushing treatment. The crushing blade is rotatably connected to a first mounting base and a second mounting base via a stirring shaft. A second bevel gear is fixedly connected to the stirring shaft. A first bevel gear is meshed with the second bevel gear. The first bevel gear is fixedly connected to one end of the hollow rotating tube.

[0013] As a further embodiment of the present invention, the continuous material turning and thermal desorption mechanism further includes a first sprocket and a second sprocket for driving the material turning box to rotate continuously. The first sprocket and the second sprocket are both rotatably connected to the inside of the second mounting base, and the first sprocket is fixedly connected to one end of the stirring shaft. The chain drive is connected to the first sprocket and the second sprocket, and the air outlet is located at the second mounting base and faces the material turning box.

[0014] As a further embodiment of the present invention, the continuous material turning and thermal desorption mechanism further includes a guide groove for driving the material turning box to rotate and guide it. The material turning box is slidably connected to the guide groove by a slider. The material turning box is provided with a receiving groove for holding material and a guiding arc edge.

[0015] As a further embodiment of the present invention, the continuous material turning and thermal desorption mechanism further includes a first material conveying shaft for driving the first auger blade to rotate and convey material. The first material conveying shaft is rotatably installed inside the inclined support seat. A second material guide pipe for discharging material is provided on the inclined support seat. A third bevel gear is fixedly connected to one end of the first material conveying shaft. The third bevel gear is meshed with the second bevel gear. The outer side of the inclined support seat is inclined.

[0016] As a further embodiment of the present invention, the cooling discharge mechanism further includes a second conveying shaft and a second auger blade for discharge and conveying. The second auger blade is rotatably mounted inside the conveying box via the second conveying shaft. The second conveying shaft is rotatably connected to the output shaft of a second motor via a synchronous belt. The second motor is fixedly mounted on the outside of the conveying box. An electric valve for guiding control is provided on the first guide pipe.

[0017] As a further embodiment of the present invention, the conveying box is fixedly installed at the bottom of the equipment body by a mounting column. The water storage tank is equipped with a pump body for continuous conveying and a cooling plate for cooling. The water storage tank is connected to the interior of the second conveying shaft through a first circulating water pipe and a second circulating water pipe. The second conveying shaft is rotatably connected to the first circulating water pipe and the second circulating water pipe. The conveying box is provided with a discharge pipe for discharging materials.

[0018] As a further embodiment of the present invention, the device body is provided with an exhaust fan for ventilation, the exhaust fan is connected to the interior of the device body through a first exhaust pipe, the exhaust fan is also provided with a second exhaust pipe for exhausting air, and the second exhaust pipe is provided with a purification head for purification treatment.

[0019] In summary, the embodiments of the present invention have the following beneficial effects compared with the prior art:

[0020] This invention, through its pretreatment mechanism, can raise the soil temperature, accelerating the volatilization or desorption of volatile pollutants in the soil. This is highly beneficial for subsequent thermal desorption treatment. Simultaneously, it can also achieve the mixing treatment of the soil entering the soil, which helps to ensure uniform heat transfer during the thermal desorption process, improves treatment efficiency, and enables the crushing treatment of the falling soil. This facilitates the easier migration of pollutants from the soil interior to the surface during the heating process, thereby improving the pollutant removal efficiency.

[0021] The continuously turning thermal desorption mechanism can be synchronously driven by the pretreatment mechanism, enabling continuous turning thermal desorption treatment of the soil. This ensures that soil particles are evenly distributed within the heating area, avoiding local overheating or underheating, thereby improving the thermal efficiency of the entire thermal desorption process. It also facilitates the diffusion of volatile pollutants from the soil interior to the exterior, accelerating their volatilization rate and improving the removal effect. Furthermore, it promotes the continuous operation of the thermal desorption process and increases the soil thermal desorption retention time, promoting effective heat transfer. This helps pollutants inside the soil to volatilize or decompose more fully, improving the thoroughness of thermal desorption.

[0022] The cooling and discharging mechanism is designed to cool and lower the temperature of the output soil. Timely cooling and lowering can reduce the damage of high temperature to the binding force between soil particles, help restore and maintain the soil structure, provide favorable conditions for subsequent soil reuse, and reduce the volatilization rate of pollutants, thus reducing their potential threat to the environment.

[0023] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of an embodiment of the invention.

[0025] Figure 2 This is a rear view structural diagram of an embodiment of the invention.

[0026] Figure 3 This is a bottom view of the structure of an embodiment of the invention.

[0027] Figure 4 This is a top view of an embodiment of the invention.

[0028] Figure 5 for Figure 4 A magnified structural diagram of A in the middle.

[0029] Figure 6 This is a schematic diagram of the connection structure of the internal guide hopper in an embodiment of the invention.

[0030] Figure 7 This is a bottom view of the internal guide hopper connection in an embodiment of the invention.

[0031] Figure 8 This is a schematic diagram of the internal structure of an embodiment of the invention.

[0032] Figure 9 This is a side view of the internal connections in an embodiment of the invention.

[0033] Figure 10This is a schematic diagram of the connection structure inside the first mounting base in an embodiment of the invention.

[0034] Figure 11 This is a schematic diagram of the connection structure inside the inclined support in the embodiment of the invention.

[0035] Figure 12 This is a schematic diagram of the connection structure of the flipping box in an embodiment of the invention.

[0036] Figure 13 This is a schematic diagram of the connection structure inside the second mounting base in an embodiment of the invention.

[0037] Figure 14 This is a schematic diagram of the connection structure of the material conveying box in an embodiment of the invention.

[0038] Figure 15 This is a schematic diagram of the internal connection structure of the material conveying box in an embodiment of the invention.

[0039] Reference numerals in the attached drawings: 1. Equipment body; 2. Feed pipe; 3. Hollow rotary tube; 4. Bevel gear pair; 5. First motor; 6. First connecting pipe; 7. Hot air blower; 8. Second connecting pipe; 9. Air outlet pipe; 10. Air outlet; 11. Stirring rod; 12. Scraper; 13. First mounting base; 14. Inclined support base; 15. First bevel gear; 16. Second bevel gear; 17. Third bevel gear; 18. First conveying shaft; 19. First auger blade; 20. First guide pipe; 21. Electric valve; 22. Stirring shaft; 23. Crushing blade; 24. Guide hopper; 25. Tilting box; 26. Chain; 27. Second mounting base; 28. Guide chute; 29. ​​First sprocket; 30. Second sprocket; 31. Receiving groove; 32. Guide arc edge; 33. Conveying box; 34. Mounting column; 35. Water tank; 36. First circulating water pipe; 37. Second circulating water pipe; 38. Second motor; 39. Synchronous belt; 40. Second conveying shaft; 41. Second auger blade; 42. First exhaust pipe; 43. Exhaust fan; 44. Second exhaust pipe; 45. Purification head; 46. Support foot; 47. Discharge pipe; 48. Second guide pipe. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0041] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0042] Example 1

[0043] See Figures 1 to 11A thermal desorption device for organic polluted soil includes a device body 1, a feed pipe 2 for feeding material onto the device body 1, support feet 46 for support at the bottom of the device body 1, a guide hopper 24 for guiding material inside the device body 1, and a conveying box 33 connected to the bottom of the device body 1 via a first guide pipe 20. The device also includes:

[0044] The pretreatment mechanism, installed inside the equipment body 1, is used to perform mixing, heating, crushing and pretreatment on the incoming soil. The pretreatment mechanism includes a hollow rotating tube 3 for heating and rotation control, a mixing rod 11 and a scraper 12 for mixing. The hollow rotating tube 3 is provided with several air outlets 10 for discharging hot air. The scraper 12 is fixedly connected to the hollow rotating tube 3 through the mixing rod 11, and the hollow rotating tube 3 is connected to a hot air blower 7 through a first connecting pipe 6. The hot air blower 7 is fixedly installed on the equipment body 1.

[0045] Furthermore, the pretreatment mechanism also includes a first motor 5 for driving the hollow rotating tube 3 to rotate. The hollow rotating tube 3 is rotatably connected to the output shaft of the first motor 5 through a bevel gear pair 4. The first motor 5 is fixedly installed on the equipment body 1, and the hollow rotating tube 3 is rotatably connected to the first connecting pipe 6. The first connecting pipe 6 is connected to an air outlet pipe 9 through a second connecting pipe 8. The air outlet pipe 9 extends into the interior of the equipment body 1.

[0046] Furthermore, the pretreatment mechanism also includes a crushing blade 23 for crushing. The crushing blade 23 is rotatably connected to the first mounting base 13 and the second mounting base 27 via a stirring shaft 22. A second bevel gear 16 is fixedly connected to the stirring shaft 22. A first bevel gear 15 is meshed on the second bevel gear 16. The first bevel gear 15 is fixedly connected to one end of the hollow rotating tube 3.

[0047] Preferably, when performing thermal desorption treatment on soil contaminated with organic matter, the soil to be treated is placed into the interior of the equipment body 1 through the feed pipe 2. The hot air generated by the hot air blower 7 is injected into the interior of the hollow rotating tube 3 through the first connecting pipe 6 and sprayed out from the air outlet 10 on the hollow rotating tube 3, thereby achieving preheating treatment of the soil. The preheating treatment can raise the soil temperature, causing volatile pollutants in the soil (such as volatile heavy metals, organic pollutants, etc.) to volatilize or decompose more quickly. This is very beneficial for the subsequent thermal desorption treatment and can significantly reduce the pollutant content.

[0048] In addition, the output shaft of the first motor 5 drives the hollow rotary tube 3 to rotate under the connection of the bevel gear pair 4. The hollow rotary tube 3 drives the stirring rod 11 and the scraper 12 to rotate, thereby realizing the stirring treatment of the soil. The stirring process can ensure that the pollutants, water, organic matter and other components in the soil are evenly mixed, providing a consistent basis for subsequent treatment steps. This helps to ensure the uniform transfer of heat during the thermal desorption process and improves the treatment efficiency.

[0049] As the soil continues to fall, the hollow rotary tube 3 drives the crushing blades 23 on the stirring shaft 22 to rotate continuously due to the meshing connection between the first bevel gear 15 and the second bevel gear 16, thereby crushing the falling soil. The crushing process can refine large pieces of soil into smaller particles, thereby increasing the surface area of ​​the soil particles. This is beneficial for pollutants to migrate more easily from the soil interior to the surface during the heating process, improving the pollutant removal efficiency. The crushed soil particles are more easily penetrated by heat, reducing the heat conduction resistance inside the soil.

[0050] Example 2

[0051] like Figures 1 to 13 As shown, this embodiment, based on embodiment 1, further includes a continuous turning and thermal desorption mechanism, which is installed inside the equipment body 1 and located on one side of the guide hopper 24. It is used to continuously turn and thermally desorb the soil. The continuous turning and thermal desorption mechanism is driven by the pretreatment mechanism. The continuous turning and thermal desorption mechanism includes a first auger blade 19 for continuous material conveying and a chain 26 for driving the turning box 25 to continuously turn the material. The turning box 25 is installed on the chain 26, and the chain 26 is connected to the inside of the equipment body 1.

[0052] Furthermore, the continuous material turning and thermal desorption mechanism also includes a first sprocket 29 and a second sprocket 30 for driving the material turning box 25 to continuously turn and rotate. The first sprocket 29 and the second sprocket 30 are both rotatably connected to the inside of the second mounting base 27, and the first sprocket 29 is fixedly connected to one end of the stirring shaft 22. The chain 26 is drivenly connected to the first sprocket 29 and the second sprocket 30. The air outlet pipe 9 is provided at the second mounting base 27 and faces the material turning box 25.

[0053] Furthermore, the continuous material turning and hot desorption mechanism also includes a guide groove 28 for driving the turning box 25 to rotate and guide it. The turning box 25 is slidably connected to the guide groove 28 by a slider. The turning box 25 is provided with a receiving groove 31 for holding material and a guiding arc edge 32.

[0054] Furthermore, the continuous material turning and thermal desorption mechanism also includes a first material conveying shaft 18 for driving the first auger blade 19 to rotate and convey material. The first material conveying shaft 18 is rotatably mounted inside the inclined support 14. A second material guide pipe 48 for discharging material is provided on the inclined support 14. A third bevel gear 17 is fixedly connected to one end of the first material conveying shaft 18. The third bevel gear 17 is meshed with the second bevel gear 16. The outer side of the inclined support 14 is inclined.

[0055] Furthermore, the equipment body 1 is equipped with an exhaust fan 43 for ventilation. The exhaust fan 43 is connected to the interior of the equipment body 1 through a first exhaust pipe 42. The exhaust fan 43 is also equipped with a second exhaust pipe 44 for exhausting air. The second exhaust pipe 44 is equipped with a purification head 45 for purification treatment.

[0056] Preferably, in this embodiment, the high-temperature hot air generated at the hot air blower 7 can be conducted from the second connecting pipe 8 to the air outlet pipe 9 and ejected, thereby realizing the thermal de-heating of the soil after crushing. Furthermore, the first connecting pipe 6 and the second connecting pipe 8 are both equipped with corresponding control valves, thereby realizing the opening and closing control of preheating and hot air in the equipment body 1. Thus, by controlling the opening and closing of the first connecting pipe 6 and the second connecting pipe 8 and the power setting of the hot air blower 7, the temperature can be regulated and controlled.

[0057] Furthermore, during the continuous crushing process driven by the mixing shaft 22 and the crushing blades 23, the first sprocket 29 is also driven to rotate. Thus, under the rotation of the second sprocket 30 and the transmission action of the chain 26, the chain 26 drives the turning box 25 to rotate continuously. Since the turning box 25 is mounted on the chain 26 and is slidably connected to the guide groove 28 via a slider, when the turning box 25 rotates to the position below the second mounting base 27, the guide arc edge 32 on the turning box 25 gradually tilts upwards, thus continuously scooping up the soil below. When the turning box 25 rotates to the position above the second mounting base 27, the guide arc edge 32 on the turning box 25 flips downwards, causing the soil contained in the receiving trough 31 to be turned downwards. The material is continuously turned over, and the back of the turning box 25 can provide corresponding buffering and retention, which significantly improves the heating efficiency of the soil, thereby significantly improving the efficiency of thermal desorption. This continuous turning method can ensure that soil particles are evenly distributed in the heating area, avoiding local overheating or underheating, thus improving the thermal efficiency of the entire thermal desorption process. At the same time, turning over also helps to evenly transfer heat in the soil, allowing pollutants to be more thoroughly desorbed from the soil. It can also increase the porosity and air circulation between soil particles, which is conducive to the diffusion of volatile pollutants from the soil interior to the exterior, thereby accelerating their volatilization rate, improving the removal effect, maintaining the loose state of the soil, which is conducive to the continuous thermal desorption process, thereby reducing the cost of the entire soil remediation project.

[0058] In addition, as the stirring shaft 22 rotates, the first auger blade 19 on the first conveying shaft 18 is driven to rotate in the meshing connection between the second bevel gear 16 and the third bevel gear 17, thereby realizing continuous conveying and output of soil. When the soil in the inclined support 14 is discharged from the second guide pipe 48, it falls gradually down the inclined surface of the second guide pipe 48, increasing the soil retention time and further improving the soil's heating efficiency. In addition, during the continuous fall of the soil on the inclined surface, its surface is constantly renewed and in contact with the heat source, promoting the effective transfer of heat. This helps the pollutants inside the soil to volatilize or decompose more fully, improving the thoroughness of thermal desorption. At the same time, through the inclined surface fall method, the soil particles undergo a certain degree of natural reorganization during the flow, which helps to partially restore the soil structure and creates better conditions for subsequent soil reuse.

[0059] Correspondingly, the exhaust fan 43 can extract polluted gas overflowing from the soil through the first exhaust pipe 42 and discharge it through the second exhaust pipe 44. The purification head 45 can purify the gas discharged from the second exhaust pipe 44, so that the gas can be safely discharged, achieving harmless treatment of the gas and protection of the environment.

[0060] Example 3

[0061] like Figures 1 to 15 As shown, this embodiment, based on the above embodiment, also includes a cooling discharge mechanism, which is installed in the conveying box 33 for cooling and discharging the treated soil. The cooling discharge mechanism includes a water storage tank 35 for circulating water cooling treatment, which is installed on one side of the conveying box 33.

[0062] Furthermore, the cooling discharge mechanism also includes a second conveying shaft 40 and a second auger blade 41 for discharge and conveying. The second auger blade 41 is rotatably mounted inside the conveying box 33 via the second conveying shaft 40. The output shaft of the second motor 38 is rotatably connected to the second conveying shaft 40 via a synchronous belt 39. The second motor 38 is fixedly mounted on the outside of the conveying box 33. An electric valve 21 for guiding control is provided on the first guide pipe 20.

[0063] Furthermore, the material conveying box 33 is fixedly installed at the bottom of the equipment body 1 by the mounting column 34. The water storage tank 35 is equipped with a pump body for continuous conveying and a cooling plate for cooling. The water storage tank 35 is connected to the interior of the second material conveying shaft 40 through the first circulating water pipe 36 and the second circulating water pipe 37. The second material conveying shaft 40 is rotatably connected to the first circulating water pipe 36 and the second circulating water pipe 37. The material conveying box 33 is provided with a discharge pipe 47 for discharging material.

[0064] Preferably, in this embodiment, the electric valve 21 on the first feed pipe 20 can control the discharge of soil. The soil that has undergone thermal desorption treatment can enter the interior of the conveying box 33 through the first feed pipe 20. The output shaft of the second motor 38 drives the second auger blade 41 on the second conveying shaft 40 to rotate under the synchronous drive of the synchronous belt 39, thereby realizing the soil conveying and processing. During the soil output process, the pump in the water tank 35 can circulate cooling water to the interior of the second conveying shaft 40 under the action of the first circulating water pipe 36 and the second circulating water pipe 37, thereby realizing the output soil Soil cooling treatment, through timely cooling, can reduce the damage of high temperature to the binding force between soil particles, which helps to restore and maintain the soil structure and provides favorable conditions for subsequent soil reuse. In addition, cooling can reduce the volatilization rate of pollutants and reduce their potential threat to the environment. Furthermore, soil microorganisms are crucial to the health and stability of the soil ecosystem. High temperature treatment will kill or inhibit the activity of microorganisms in the soil. After cooling, the soil temperature gradually returns to the range suitable for microbial growth, which helps the microbial community to recover and rebuild rapidly and promotes the restoration of soil ecological functions.

[0065] It should be noted that both the second conveyor shaft 40 and the output shaft of the second motor 38 are equipped with pulleys that are synchronously connected to the synchronous belt 39.

[0066] It should be noted that the components in this application are all general standard parts or parts known to those skilled in the art, which effectively solve the technical problems raised in the background art.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A thermal desorption device for organic polluted soil, comprising a device body (1), a feed pipe (2) for feeding is provided on the device body (1), and support feet (46) for support are provided at the bottom of the device body (1), characterized in that, The equipment body (1) is provided with a guide hopper (24) for material guiding, and the bottom of the equipment body (1) is connected to a conveying box (33) through a first guide pipe (20). It also includes: The pretreatment mechanism, installed inside the equipment body (1), is used to perform mixing, heating, crushing, and pretreatment on the incoming soil. The pretreatment mechanism includes a hollow rotating tube (3) for heating and rotation control, a mixing rod (11) and a scraper (12) for mixing. The hollow rotating tube (3) is provided with several air outlets (10) for discharging hot air. The scraper (12) is fixedly connected to the hollow rotating tube (3) through the mixing rod (11), and the hollow rotating tube (3) is connected to a hot air blower (7) through a first connecting pipe (6). The hot air blower (7) is fixedly installed on the equipment body (1). The pretreatment mechanism also includes a crushing blade (23) for crushing. The crushing blade (23) is rotatably connected to the first mounting base (13) and the second mounting base (27) via a stirring shaft (22). A second bevel gear (16) is fixedly connected to the stirring shaft (22). A first bevel gear (15) is meshed on the second bevel gear (16). The first bevel gear (15) is fixedly connected to one end of the hollow rotating tube (3). A continuous turning and thermal desorption mechanism is installed inside the equipment body (1) and located on one side of the guide hopper (24). It is used for continuous turning and thermal desorption treatment of soil. The continuous turning and thermal desorption mechanism is driven by the pretreatment mechanism. The continuous turning and thermal desorption mechanism includes a first auger blade (19) for continuous material conveying and a chain (26) for driving the turning box (25) to continuously turn the material. The turning box (25) is installed on the chain (26), and the chain (26) is connected to the inside of the equipment body (1). The continuous turning and thermal desorption mechanism also includes a first sprocket (29) and a second sprocket (30) for driving the turning box (25) to continuously turn and rotate. The first sprocket (29) and the second sprocket (30) are both rotatably connected to the inside of the second mounting base (27). The first sprocket (29) is fixedly connected to one end of the stirring shaft (22). The chain (26) is connected to the first sprocket (29) and the second sprocket. On (30), the vent pipe (9) is located at the second mounting base (27) and faces the material turning box (25). The continuous material turning thermal desorption mechanism also includes a guide groove (28) for driving the material turning box (25) to rotate and guide it. The material turning box (25) is slidably connected to the guide groove (28) by a slider. The material turning box (25) is provided with a receiving groove (31) for holding material and a guiding arc edge (32). The continuous material turning thermal desorption mechanism also includes a guide groove (38) for driving the material turning box (25) to rotate and guide it. The first auger blade (19) rotates the first conveying shaft (18) for material feeding. The first conveying shaft (18) is rotatably installed inside the inclined support seat (14). The inclined support seat (14) is provided with a second guide pipe (48) for material discharge. One end of the first conveying shaft (18) is fixedly connected to a third bevel gear (17). The third bevel gear (17) is meshed with the second bevel gear (16). The outer side of the inclined support seat (14) is inclined. A cooling discharge mechanism is installed inside the conveying box (33) for cooling and discharging the treated soil. The cooling discharge mechanism includes a water storage tank (35) for circulating water cooling treatment, which is installed on one side of the conveying box (33).

2. The thermal desorption equipment for organic polluted soil according to claim 1, characterized in that, The pretreatment mechanism also includes a first motor (5) for driving the hollow rotating tube (3) to rotate. The hollow rotating tube (3) is rotatably connected to the output shaft of the first motor (5) through a bevel gear pair (4). The first motor (5) is fixedly installed on the equipment body (1), and the hollow rotating tube (3) is rotatably connected to the first connecting pipe (6). The first connecting pipe (6) is connected to an air outlet pipe (9) through a second connecting pipe (8). The air outlet pipe (9) extends into the interior of the equipment body (1).

3. The thermal desorption equipment for organic-contaminated soil according to claim 1, characterized in that, The cooling discharge mechanism also includes a second conveying shaft (40) and a second auger blade (41) for discharge and conveying. The second auger blade (41) is rotatably mounted inside the conveying box (33) via the second conveying shaft (40). The second conveying shaft (40) is rotatably connected to the output shaft of the second motor (38) via a synchronous belt (39). The second motor (38) is fixedly mounted on the outside of the conveying box (33). An electric valve (21) for guiding control is provided on the first guide pipe (20).

4. The thermal desorption equipment for organic polluted soil according to claim 3, characterized in that, The material conveying box (33) is fixedly installed at the bottom of the equipment body (1) by the mounting column (34). The water storage tank (35) is equipped with a pump body for continuous conveying and a cooling plate for cooling. The water storage tank (35) is connected to the inside of the second material conveying shaft (40) through the first circulating water pipe (36) and the second circulating water pipe (37). The second material conveying shaft (40) is rotatably connected to the first circulating water pipe (36) and the second circulating water pipe (37). The material conveying box (33) is provided with a discharge pipe (47) for discharging material.

5. The thermal desorption equipment for organic-contaminated soil according to claim 1, characterized in that, The device body (1) is provided with an exhaust fan (43) for ventilation. The exhaust fan (43) is connected to the interior of the device body (1) through a first exhaust pipe (42). The exhaust fan (43) is also provided with a second exhaust pipe (44) for exhausting air. The second exhaust pipe (44) is provided with a purification head (45) for purification treatment.

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