Thermal desorption equipment for soil polluted by organic matters

Abstract

The invention discloses thermal desorption equipment for organic matter contaminated soil, and belongs to the technical field of soil remediation treatment, and the thermal desorption equipment is technically characterized by comprising an equipment body, the soil temperature can be increased through an arranged pretreatment mechanism, meanwhile, uniform transfer of heat in the thermal desorption process is facilitated, and falling soil can be crushed; by arranging the continuous material turning and thermal desorption mechanism, continuous material turning and thermal desorption treatment on the soil can be correspondingly achieved, the thermal efficiency of the whole thermal desorption process is improved, volatile pollutants can be diffused from the interior of the soil to the exterior of the soil, and the removal effect is improved; the cooling and temperature reduction treatment on output soil is realized through the arranged cooling and discharging mechanism, and the damage of high temperature to binding force among soil particles can be reduced through timely cooling and temperature reduction, so that the recovery and maintenance of a soil structure are facilitated, and favorable conditions are provided for subsequent soil reutilization; the device has the advantages of good pretreatment and thermal desorption effects and convenience in cooling treatment.

Description

Technical Field

[0001] The invention relates to the field of soil remediation and treatment, and in particular to a thermal desorption device for soil contaminated by organic matter. Background Art

[0002] With the rapid development of industrialization and urbanization, the problem of soil contamination by organic matter has become increasingly prominent, posing a serious threat to human health and the ecological environment. These organic pollutants are usually highly toxic, difficult to degrade, and bioaccumulative. In order to effectively address this problem, thermal desorption technology, as an efficient and environmentally friendly soil remediation technology, has gradually received widespread attention and application.

[0003] Thermal desorption equipment for organic contaminated soil is a technical equipment specially used to treat soil containing organic pollutants. It converts organic pollutants in the soil from solid or liquid to gas by heating, and then collects the gas through a special desorption system and performs subsequent treatment to achieve the purpose of purifying the soil. At present, conventional soil thermal desorption treatment is mostly carried out by direct heating or passing hot air to the soil, but direct heating or passing hot air cannot have good contact with the soil, and lacks corresponding pretreatment measures. The thermal desorption effect is poor and cannot meet the needs of actual use.

[0004] Therefore, it is necessary to provide a thermal desorption device for organic matter contaminated soil to solve the above problems. Summary of the invention

[0005] In view of the shortcomings of the prior art, an embodiment of the present invention aims to provide a thermal desorption device for organic contaminated soil, aiming to solve the technical problems raised in the background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A thermal desorption device for organic polluted soil comprises a device body, a feeding pipe for feeding is arranged on the device body, a supporting foot for supporting is arranged at the bottom of the device body, a material guide hopper for material guide treatment is arranged in the device body, the bottom of the device body is connected to a material delivery box through a first material guide pipe, and further comprises:

[0008] A pretreatment mechanism is installed in the equipment body and is used for stirring, heating and crushing the incoming soil for pretreatment. The pretreatment mechanism includes a hollow rotating tube for heating and rotation control and a stirring rod and a scraper for stirring. The hollow rotating tube is provided with a plurality of air outlets for discharging hot air. The scraper is fixedly connected to the hollow rotating tube through the stirring 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 material turning and thermal desorption mechanism is installed in the equipment body and located on one side of the guide hopper, and is used for continuously turning and thermally desorbing the soil, and the continuous material turning and thermal desorption mechanism is driven by the pretreatment mechanism, and the continuous material turning and thermal desorption mechanism includes a first auger blade for continuous material feeding and a chain for driving a turning box to continuously turn the material, and the turning box is installed on the chain, and the chain is connected to the inside of the equipment body;

[0010] The cooling and discharging mechanism is installed in the feed box and is used for cooling and discharging the treated soil. The cooling and discharging mechanism comprises a water storage tank for circulating water cooling treatment, and the water storage tank is installed on one side of the feed box.

[0011] As a further solution of the present invention, the pretreatment mechanism also 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 mounted on the equipment body, and the hollow rotating tube is rotatably connected to the first connecting tube, the first connecting tube is connected to the exhaust pipe through the second connecting pipe, and the exhaust pipe extends into the interior of the equipment body.

[0012] As a further solution of the present invention, the pretreatment mechanism also includes a crushing blade for crushing processing, the crushing blade is rotatably connected to the first mounting seat and the second mounting seat through a stirring shaft, the stirring shaft is fixedly connected to a second bevel gear, the second bevel gear is meshed with a first bevel gear, and the first bevel gear is fixedly connected to one end of the hollow rotating tube.

[0013] As a further solution of the present invention, the continuous material turning and thermal desorption mechanism also includes a first sprocket and a second sprocket for driving the material turning box to continuously turn and rotate, the first sprocket and the second sprocket are both rotatably connected to the inside of the second mounting seat, 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 pipe is arranged at the second mounting seat and facing the material turning box.

[0014] As a further solution of the present invention, the continuous material turning and thermal desorption mechanism also includes a guide slide groove for driving the material turning box to perform rotational guidance, the material turning box is slidably connected to the guide slide groove through a slider, and the material turning box is provided with a receiving groove and a material guiding arc edge for holding the material.

[0015] As a further solution of the present invention, the continuous material turning and thermal desorption mechanism also includes a first feed shaft for driving the first auger blade to rotate and feed material. The first feed shaft is rotatably installed inside the oblique support seat. A second material guide pipe for discharging material is arranged on the oblique support seat. One end of the first feed shaft is fixedly connected to a third bevel gear. The third bevel gear is meshingly connected to the second bevel gear. The outer side of the oblique support seat is inclined.

[0016] As a further solution of the present invention, the cooling discharge mechanism also includes a second feed shaft and a second auger blade for discharge and transportation, the second auger blade is rotatably installed inside the feed box through the second feed shaft, the second feed shaft is rotatably connected to the output shaft of the second motor through a synchronous belt, the second motor is fixedly installed on the outside of the feed box, and the first guide pipe is provided with an electric valve for material guide control.

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

[0018] As a further solution of the present invention, an exhaust fan for exhausting air is provided on the device body, and 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, compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0020] The present invention can increase the soil temperature by setting up a pretreatment mechanism, so that the volatile pollutants in the soil can be volatilized or decomposed faster, which is very beneficial for the subsequent thermal desorption treatment. At the same time, the stirring treatment of the incoming soil can be realized accordingly, which helps to evenly transfer heat during the thermal desorption process and improve the treatment efficiency. It can also realize the crushing treatment of the falling soil, which is conducive to the pollutants to migrate more easily from the inside of the soil to the surface during the heating process, thereby improving the removal efficiency of the pollutants.

[0021] The continuous turning thermal desorption mechanism can be synchronously driven by the pretreatment mechanism, and can realize the continuous turning thermal desorption treatment of the soil accordingly, which can ensure that the soil particles are evenly distributed in the heating area, avoid local overheating or underheating, thereby improving the thermal efficiency of the entire thermal desorption process, and is beneficial to the diffusion of volatile pollutants from the inside of the soil to the outside, thereby accelerating their volatilization rate, improving the removal effect, and being beneficial to the continuation of the thermal desorption process. In addition, it correspondingly increases the retention time of soil thermal desorption and promotes the effective transfer of heat, which helps the pollutants inside the soil to volatilize or decompose more fully, and improves the thoroughness of thermal desorption.

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

[0023] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0026] Figure 3 It is a bottom view structural schematic diagram of an embodiment of the invention.

[0027] Figure 4 It is a schematic diagram of the top structure of an embodiment of the invention.

[0028] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of A.

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

[0030] Figure 7 It is a schematic diagram of the upward structure of the internal guide hopper connection of an embodiment of the invention.

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

[0032] Fig. 9 It is a side view schematic diagram of the internal connection of an embodiment of the invention.

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

[0034] Fig.11 It is a schematic diagram of the connection structure inside the oblique support seat in an embodiment of the invention.

[0035] Fig.12 It is a schematic diagram of the connection structure of the material turning box in the embodiment of the invention.

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

[0037] Fig.14 It is a schematic diagram of the connection structure of the feed box in an embodiment of the invention.

[0038] Fig.15 It is a schematic diagram of the connection structure inside the feed box in an embodiment of the invention.

[0039] Figure numerals: 1, equipment body; 2, feed pipe; 3, hollow rotating pipe; 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 hole; 11, stirring rod; 12, scraper; 13, first mounting seat; 14, oblique support seat; 15, first bevel gear; 16, second bevel gear; 17, third bevel gear; 18, first feed shaft; 19, first auger blade; 20, first guide pipe; 21, electric valve; 22, stirring shaft; 23, crushing blade; 24, guide hopper; 25. Material turning box; 26. Chain; 27. Second mounting seat; 28. Guide slide; 29. ​​First sprocket; 30. Second sprocket; 31. Receiving groove; 32. Material guiding arc edge; 33. Material feeding box; 34. Mounting column; 35. Water storage tank; 36. First circulating water pipe; 37. Second circulating water pipe; 38. Second motor; 39. Timing belt; 40. Second material feeding 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 material guiding pipe. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0042] Example 1

[0043] See also Figures 1 to 11A thermal desorption device for organic polluted soil includes a device body 1, a feed pipe 2 for feeding is arranged on the device body 1, a support foot 46 for supporting is arranged at the bottom of the device body 1, a guide hopper 24 for guiding material processing is arranged inside the device body 1, and the bottom of the device body 1 is connected to a feed box 33 through a first guide pipe 20, and also includes:

[0044] The pretreatment mechanism is installed in the equipment body 1 and is used for stirring, heating and crushing the incoming soil for pretreatment. The pretreatment mechanism includes a hollow rotating tube 3 for heating and rotation control and a stirring rod 11 and a scraper 12 for stirring treatment. The hollow rotating tube 3 is provided with a plurality of air outlets 10 for discharging hot air. The scraper 12 is fixedly connected to the hollow rotating tube 3 through the stirring rod 11, and the hollow rotating tube 3 is connected to a hot air blower 7 through a first connecting tube 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 mounted on the equipment body 1, and the hollow rotating tube 3 is rotatably connected to the first connecting tube 6. The first connecting tube 6 is connected to the exhaust pipe 9 through the second connecting tube 8. The exhaust pipe 9 extends into the interior of the equipment body 1.

[0046] Furthermore, the pretreatment mechanism also includes a crushing blade 23 for crushing processing, which is rotatably connected to the first mounting seat 13 and the second mounting seat 27 through the stirring shaft 22. The stirring shaft 22 is fixedly connected to the second bevel gear 16, and the second bevel gear 16 is meshingly connected to the first bevel gear 15. 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, and the high-temperature 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 is ejected from the air outlet 10 on the hollow rotating tube 3, thereby realizing heating pretreatment of the incoming soil. The heating pretreatment can increase the soil temperature and accelerate the volatilization or decomposition of volatile pollutants in the soil (such as volatile heavy metals, organic pollutants, etc.), which is very beneficial for 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 rotating tube 3 to rotate under the connection relationship of the bevel gear pair 4, so that the hollow rotating tube 3 drives the stirring rod 11 and the scraper 12 to rotate, thereby achieving stirring treatment of the soil entering. The stirring process can ensure that the pollutants, moisture, organic matter and other components in the soil are evenly mixed, providing a consistent basis for subsequent treatment steps, which helps to evenly transfer heat during thermal desorption and improve treatment efficiency.

[0049] As the soil continues to fall, the hollow rotating tube 3 drives the crushing blade 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 break up large pieces of soil into smaller particles, thereby increasing the surface area of ​​the soil particles, which is conducive to the easier migration of pollutants from the inside of the soil to the surface during the heating process, thereby improving the removal efficiency of pollutants. 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, based on Example 1, this embodiment further includes a continuous turning and thermal desorption mechanism, which is installed in the equipment body 1 and located on one side of the guide hopper 24, and is used for continuously turning and thermally desorbing the soil, and 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 feeding and a chain 26 for driving a turning box 25 for continuous turning. The turning box 25 is installed on the chain 26, and the chain 26 is transmission-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 seat 27, and the first sprocket 29 is fixedly connected to one end of the stirring shaft 22, the chain 26 is transmission-connected to the first sprocket 29 and the second sprocket 30, and the air outlet pipe 9 is arranged at the second mounting seat 27 and is arranged toward the material turning box 25.

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

[0054] Furthermore, the continuous material turning and thermal desorption mechanism also includes a first feed shaft 18 for driving the first auger blade 19 to rotate and feed material. The first feed shaft 18 is rotatably installed inside the oblique support seat 14. A second material guide pipe 48 for discharging material is arranged on the oblique support seat 14. One end of the first feed shaft 18 is fixedly connected to a third bevel gear 17. The third bevel gear 17 is meshingly connected to the second bevel gear 16. The outer side of the oblique support seat 14 is inclined.

[0055] Furthermore, an exhaust fan 43 for exhausting air is provided on the device body 1, and 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, and the second exhaust pipe 44 is provided 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 transmitted from the second connecting pipe 8 to the outlet pipe 9 for ejection, thereby realizing the thermal decomposition and additional heat treatment of the soil after the crushing process, and the first connecting pipe 6 and the second connecting pipe 8 are provided with corresponding control valves, so as to realize the preheating and the opening and closing control of the hot air in the equipment body 1, so that the temperature can be adjusted 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.

[0057] In addition, the stirring shaft 22 drives the crushing blade 23 to rotate continuously during the crushing process, and the first sprocket 29 is correspondingly driven to rotate, so that under the rotation of the second sprocket 30 and the transmission action of the chain 26, the chain 26 can be driven to drive the tipping box 25 to rotate continuously. Since the tipping box 25 is installed on the chain 26 and the tipping box 25 is slidably connected to the guide slide groove 28 through a slider, when the tipping box 25 rotates to the position below the second mounting seat 27, the guide arc edge 32 on the tipping box 25 gradually tilts upward, so that the soil below can be continuously shoveled, and when the tipping box 25 rotates to the upper position of the second mounting seat 27, the guide arc edge 32 on the tipping box 25 flips downward, so that the soil contained in the receiving groove 31 is flipped down. The material is turned over and the back of the material turning box 25 can be used for corresponding buffering and retention, which significantly improves the heating efficiency of the soil, thereby significantly improving the efficiency of thermal desorption. This method of constantly turning the material can ensure that the soil particles are evenly distributed in the heating area, avoiding local overheating or underheating, thereby improving the thermal efficiency of the entire thermal desorption process. At the same time, turning the material also helps to evenly transfer heat in the soil, so that pollutants can be more thoroughly desorbed from the soil. At the same time, it can also increase the porosity and air circulation between soil particles, which is beneficial to the diffusion of volatile pollutants from the inside of the soil to the outside, thereby accelerating its volatilization rate, improving the removal effect, keeping the soil loose, and facilitating the continuous thermal desorption process, thereby reducing the cost of the entire soil remediation project.

[0058] In addition, while the stirring shaft 22 rotates, the first auger blade 19 on the first feed shaft 18 is driven to rotate accordingly under the meshing connection between the second bevel gear 16 and the third bevel gear 17, thereby realizing continuous transportation and output of the soil. When the soil in the oblique support seat 14 is discharged from the second guide pipe 48, it falls into the inclined surface of the second guide pipe 48 and gradually falls, which increases the retention time of the soil, thereby further improving the heating efficiency of the soil. In addition, during the continuous falling of the soil on the inclined surface, its surface continuously renews the contact with the heat source, which promotes the effective transfer of heat, which helps to more fully volatilize or decompose the pollutants inside the soil, and improves the thoroughness of thermal desorption. At the same time, by falling on the inclined surface, the soil particles undergo a certain degree of natural reorganization during the flow, which helps to partially restore the soil structure and create better conditions for subsequent soil reuse.

[0059] Correspondingly, the exhaust fan 43 can extract the polluted gas overflowing from the soil through the first exhaust pipe 42 and discharge it from 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 discharged safely, achieving harmless treatment of the gas and environmental protection.

[0060] Example 3

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

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

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

[0064] Preferably, in this embodiment, the electric valve 21 on the first material guide pipe 20 can be used to control the discharge of the soil material guide accordingly, and the soil after the thermal desorption treatment can enter the interior of the material delivery box 33 through the first material guide pipe 20. The output shaft of the second motor 38 drives the second auger blade 41 on the second material delivery shaft 40 to rotate under the synchronous driving action of the synchronous belt 39, thereby realizing the soil transportation treatment. In the process of soil output, the pump body in the water storage tank 35 can circulate the cooling water in the interior of the second material delivery shaft 40 under the action of the first circulating water pipe 36 and the second circulating water pipe 37, thereby realizing the output of the soil. Soil cooling treatment, through timely cooling, can reduce the damage of high temperature to the binding force between soil particles, help to restore and maintain soil structure, provide favorable conditions for subsequent soil reuse, and through cooling, can reduce the volatilization rate of pollutants and reduce their potential threat to the environment. In addition, microorganisms in the soil 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 a range suitable for microbial growth, which helps the rapid recovery and reconstruction of microbial communities and promotes the recovery of soil ecological functions.

[0065] It should be particularly noted that the second feed shaft 40 and the output shaft of the second motor 38 are both provided with pulleys which are synchronously connected with the synchronous belt 39 .

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

[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 in the protection scope of the present invention.

Claims

1. A thermal desorption device for organic contaminated soil, comprising a device body (1), a feeding pipe (2) for feeding is arranged on the device body (1), and a supporting foot (46) for supporting is arranged at the bottom of the device body (1), characterized in that: The equipment body (1) is provided with a material guide hopper (24) for material guide processing, and the bottom of the equipment body (1) is connected to a material delivery box (33) through a first material guide pipe (20), and further comprises: A pretreatment mechanism is installed in the equipment body (1) and is used for stirring, heating and crushing the incoming soil for pretreatment. The pretreatment mechanism comprises a hollow rotating tube (3) for heating and rotating control and a stirring rod (11) and a scraper (12) for stirring treatment. The hollow rotating tube (3) is provided with a plurality of air outlets (10) for discharging hot air. The scraper (12) is fixedly connected to the hollow rotating tube (3) through the stirring rod (11). The hollow rotating tube (3) is connected to a hot air blower (7) through a first connecting tube (6). The hot air blower (7) is fixedly installed on the equipment body (1); A continuous material turning and thermal desorption mechanism is installed in the equipment body (1) and located on one side of the material guide hopper (24), and is used for continuously turning and thermally desorbing the soil, and the continuous material turning and thermal desorption mechanism is driven by the pretreatment mechanism, and the continuous material turning and thermal desorption mechanism comprises a first auger blade (19) for continuous material feeding and a chain (26) for driving a turning box (25) for continuous material turning, and the turning box (25) is installed on the chain (26), and the chain (26) is transmission-connected to the inside of the equipment body (1); The cooling and discharging mechanism is installed in the feed box (33) and is used for cooling and discharging the treated soil. The cooling and discharging mechanism comprises a water storage tank (35) for circulating water cooling treatment. The water storage tank (35) is installed on one side of the feed box (33).

2. The thermal desorption device for organic contaminated 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 mounted on the equipment body (1), and the hollow rotating tube (3) is rotatably connected to the first connecting tube (6), the first connecting tube (6) is connected to an air outlet pipe (9) through a second connecting tube (8), and the air outlet pipe (9) extends into the interior of the equipment body (1).

3. The thermal desorption device for organic contaminated soil according to claim 2, characterized in that: The pretreatment mechanism also includes a crushing blade (23) for crushing treatment, wherein the crushing blade (23) is rotatably connected to the first mounting seat (13) and the second mounting seat (27) via a stirring shaft (22), the stirring shaft (22) is fixedly connected to a second bevel gear (16), the second bevel gear (16) is meshingly connected to a first bevel gear (15), and the first bevel gear (15) is fixedly connected to one end of the hollow rotating tube (3).

4. The thermal desorption device for organic contaminated soil according to claim 2, characterized in that: 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 seat (27), and the first sprocket (29) is fixedly connected to one end of the stirring shaft (22), the chain (26) is transmission-connected to the first sprocket (29) and the second sprocket (30), and the air outlet pipe (9) is arranged at the second mounting seat (27) and is arranged toward the material turning box (25).

5. The thermal desorption device for organic contaminated soil according to claim 4, characterized in that: The continuous material turning and thermal desorption mechanism also includes a guide slide groove (28) for driving the material turning box (25) to perform rotational guidance, the material turning box (25) is slidably connected to the guide slide groove (28) via a slider, and the material turning box (25) is provided with a receiving groove (31) for holding materials and a material guiding arc edge (32).

6. The thermal desorption device for organic contaminated soil according to claim 5, characterized in that: The continuous material turning and thermal desorption mechanism also includes a first material feeding shaft (18) for driving the first auger blade (19) to rotate and feed the material. The first material feeding shaft (18) is rotatably mounted inside the oblique support seat (14). A second material guide pipe (48) for discharging the material is arranged on the oblique support seat (14). One end of the first material feeding shaft (18) is fixedly connected to a third bevel gear (17). The third bevel gear (17) is meshingly connected to the second bevel gear (16). The outer side of the oblique support seat (14) is inclined.

7. The thermal desorption device for organic contaminated soil according to claim 1, characterized in that: The cooling discharge mechanism also includes a second feed shaft (40) and a second auger blade (41) for discharge and transportation. The second auger blade (41) is rotatably mounted inside the feed box (33) via the second feed shaft (40). The second feed 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 feed box (33). The first guide pipe (20) is provided with an electric valve (21) for material guide control.

8. The thermal desorption device for organic contaminated soil according to claim 7, characterized in that: The feed box (33) is fixedly mounted on the bottom of the equipment body (1) via a mounting column (34); a pump body for continuous delivery and a refrigeration plate for refrigeration are installed in the water storage tank (35); the water storage tank (35) is connected to the interior of the second feed shaft (40) via a first circulating water pipe (36) and a second circulating water pipe (37); and the second feed shaft (40) is rotatably connected to the first circulating water pipe (36) and the second circulating water pipe (37); and a discharge pipe (47) for discharging materials is provided on the feed box (33).

9. The thermal desorption device for organic contaminated soil according to claim 1, characterized in that: The device body (1) is provided with an exhaust fan (43) for exhausting air. 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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