A thermal desorption equipment for saline-alkali soil remediation

Abstract

The application is suitable for the technical field of soil remediation, and provides a thermal desorption equipment for saline-alkali soil remediation, which comprises a treatment barrel and further comprises a separation module, the separation module comprises a hollow main shaft installed in the interior of the treatment barrel, the top of the hollow main shaft penetrates through the top wall of the treatment barrel, a driving unit for driving the hollow main shaft to rotate is installed on the top of the treatment barrel, a plurality of stirring pipes are annularly installed in the region of the interior of the treatment barrel where the hollow main shaft is located, the stirring pipes are in communication with the interior of the hollow main shaft, a plurality of arc-shaped separation plates are annularly arranged around the hollow main shaft, the arc-shaped separation plates are sleeved on the stirring pipes and can move along the radial direction of the hollow main shaft, and a control unit for driving each arc-shaped separation plate to synchronously linearly move along the radial direction of the hollow main shaft is further arranged on the stirring pipe. The state of the device is flexible and adjustable, the soil to be treated can be fully stirred and mixed, the working efficiency is high, and the use effect is good.

Description

Technical Field

[0001] This invention belongs to the field of soil remediation technology, and in particular relates to a thermal desorption device for the remediation of saline-alkali soil. Background Technology

[0002] Thermal desorption equipment for soil remediation is a non-combustion device that separates organic pollutants by heating the soil. The core principle of thermal desorption equipment is to heat the soil to above the boiling point of the pollutants (usually 150-550℃) through direct or indirect heat exchange, causing the pollutants to vaporize and volatilize. The gas is then collected and treated by a gas collection system, followed by condensation and filtration.

[0003] Soil thermal desorption has two methods: direct heating and indirect heating. For existing thermal desorption equipment, most devices only have one heating method and cannot flexibly switch between the two heating methods. This limits the applicability of thermal desorption equipment and is not conducive to treating different saline-alkali soils. Summary of the Invention

[0004] The purpose of this invention is to provide a thermal desorption device for the remediation of saline-alkali soil, aiming to solve the problems mentioned in the background art.

[0005] This invention is implemented as follows: a thermal desorption device for saline-alkali soil remediation includes a treatment tank mounted on a mounting frame, with a soil inlet and a heat medium inlet at the top of the treatment tank; it also includes:

[0006] The separation module includes a hollow main shaft installed inside a processing tank. The top of the hollow main shaft penetrates the top wall of the processing tank, and a drive unit for driving the hollow main shaft to rotate is installed on the top of the processing tank. Several stirring tubes are arranged in a ring around the area of ​​the hollow main shaft inside the processing tank, and the stirring tubes are connected to the interior of the hollow main shaft. Several arc-shaped partition plates are also arranged in a ring around the hollow main shaft. The arc-shaped partition plates are sleeved on the stirring tubes and can move radially along the hollow main shaft. A control unit is also provided on the stirring tube for driving each arc-shaped partition plate to move linearly and synchronously along the radial direction of the hollow main shaft.

[0007] When the distance between each of the arc-shaped partition plates and the axis of the hollow main shaft is the smallest, the side walls of two adjacent arc-shaped partition plates abut against each other, and each arc-shaped partition plate cooperates to form a tubular channel, and the stirring tube is provided with several first drug discharge holes in the area outside the tube.

[0008] In a further technical solution, the area where the heat medium addition port communicates with the inside of the treatment tank is located inside the tubular channel, while the area where the soil addition port communicates with the inside of the treatment tank is located outside the tubular channel.

[0009] In a further technical solution, the drive unit includes a drive motor installed on the top of the processing tank, the output end of the drive motor is connected to a drive shaft, a drive gear is sleeved on the drive shaft, and a transmission gear that meshes with the drive gear is installed on the top of the hollow main shaft.

[0010] A further technical solution includes a sliding sleeve slidably mounted on the hollow main shaft along its axial direction, and an adjusting rod hinged to the inner wall of each arc-shaped partition plate (the side of the arc-shaped partition plate closest to the hollow main shaft is defined as the inner side). The end of the adjusting rod away from the arc-shaped partition plate is hinged to the sliding sleeve. The top of the processing tank is also provided with a telescopic unit for driving the sliding sleeve to move linearly along the axial direction of the hollow main shaft.

[0011] In a further technical solution, the telescopic unit includes a telescopic component installed on the top of the processing tank, and a connecting seat is installed on the telescopic end of the telescopic component, and the connecting seat is sleeved on the connecting card platform drive motor provided on the top of the sliding sleeve.

[0012] In a further technical solution, the telescopic component is a hydraulic telescopic rod.

[0013] In a further technical solution, a second row of medicine holes is provided in the area inside the tubular channel of the stirring tube, and a sealing sleeve is also provided on the inner side wall of the arc-shaped partition plate. The sealing sleeve is sleeved on the stirring tube, and a mating hole is provided on the sealing sleeve.

[0014] When the distance between the arc-shaped partition plate and the axis of the hollow main shaft is at its minimum, the mating hole will be misaligned with the second row of medicine holes, and the sealing sleeve will block the second row of medicine holes.

[0015] This invention provides a thermal desorption device for saline-alkali soil remediation, which allows for flexible switching of heating states according to usage requirements. Specifically, when indirect heating is selected, the control unit drives each arc-shaped partition plate to move along the stirring tube towards the hollow main shaft, ultimately causing the sidewalls of two adjacent arc-shaped partition plates to abut against each other, forming a tubular channel. At this time, the interior of the treatment tank is divided into two chambers for indirect heating. The heating medium is supplied from the heating medium inlet to the tubular channel, and the soil to be treated is supplied through the soil inlet to the area between the tubular channel and the sidewall of the treatment tank. The tubular channel separates the medium from the soil. Simultaneously, the reagent is added to the hollow main shaft, which transports the reagent to the stirring tube and finally discharges it into the soil through the first row of reagent holes, thus enabling thermal desorption treatment. During this process, the drive unit drives the hollow main shaft to rotate synchronously, which in turn drives the stirring tube and the arc-shaped partition plates to rotate synchronously. The mixing tubes allow for thorough mixing and agitation of the soil, resulting in more complete and uniform heating. When direct heating is desired, the control unit moves the arc-shaped partitions away from the hollow main shaft, transforming the interior of the treatment tank into a single, complete chamber for direct heating. During this process, the arc-shaped partitions also act as agitators, mixing the soil and accelerating thermal desorption. The device is flexible and adjustable, effectively mixing the soil and offering high efficiency and excellent performance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a thermal desorption device for saline-alkali soil remediation provided in an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of a thermal desorption device for saline-alkali soil remediation provided in an embodiment of the present invention from another perspective;

[0018] Figure 3 This is a schematic diagram of the structure of a partition module in a thermal desorption device for saline-alkali land soil remediation provided in an embodiment of the present invention;

[0019] Figure 4 This is a partial structural diagram of a separation module in a thermal desorption device for saline-alkali land soil remediation provided in an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the hollow main shaft in a thermal desorption device for saline-alkali land soil remediation provided in an embodiment of the present invention;

[0021] Figure 6This is a schematic diagram of the arc-shaped partition plate in a thermal desorption device for saline-alkali land soil remediation provided in an embodiment of the present invention;

[0022] Figure 7 for Figure 2 Enlarged view of point A in the image.

[0023] In the attached diagram: 1. Treatment tank; 11. Mounting frame; 12. Soil inlet; 13. Heat medium inlet; 2. Separating module; 21. Hollow main shaft; 22. Stirring pipe; 221. First row of medicine hole; 222. Second row of medicine hole; 23. Arc-shaped separator plate; 24. Sliding sleeve; 25. Connecting clamp; 26. Drive motor; 261. Adjusting rod; 26. Sealing sleeve; 261. Fitting hole; 3. Telescopic unit; 31. Telescopic component; 32. Connecting seat; 4. Drive unit; 41. Drive motor; 42. Drive shaft; 43. Drive gear; 44. Transmission gear. Detailed Implementation

[0024] 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.

[0025] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0026] like Figures 1-5 As shown, a thermal desorption device for saline-alkali soil remediation according to an embodiment of the present invention includes a treatment tank 1, which is mounted on a mounting frame 11. The top of the treatment tank 1 is provided with a soil inlet 12 and a heat medium inlet 13; it also includes:

[0027] The separation module 2 includes a hollow main shaft 21 installed inside the processing tank 1. The top of the hollow main shaft 21 penetrates the top wall of the processing tank 1, and a drive unit 4 for driving the hollow main shaft 21 to rotate is installed on the top of the processing tank 1. Several stirring tubes 22 are arranged in a ring around the area of ​​the hollow main shaft 21 inside the processing tank 1, and the stirring tubes 22 are connected to the interior of the hollow main shaft 21. Several arc-shaped partition plates 23 are also arranged in a ring around the hollow main shaft 21. The arc-shaped partition plates 23 are sleeved on the stirring tubes 22 and can move radially along the hollow main shaft 21. A control unit is also provided on the stirring tubes 22 for driving each arc-shaped partition plate 23 to move linearly along the radial direction of the hollow main shaft 21 synchronously.

[0028] When the distance between the arc-shaped partition plate 23 and the axis of the hollow main shaft 21 is the smallest, the side walls of two adjacent arc-shaped partition plates 23 abut against each other, and the arc-shaped partition plates 23 cooperate to form a tubular channel, and the stirring tube 22 is provided with a number of first drug discharge holes 221 in the area outside the tube.

[0029] In this embodiment of the invention, the area where the heat medium inlet 13 communicates with the interior of the treatment tank 1 is located inside the tubular channel, while the area where the soil inlet 12 communicates with the interior of the treatment tank 1 is located outside the tubular channel. During use, the heating state can be flexibly switched according to usage requirements. Specifically, when indirect heating is selected, the control unit simply moves each arc-shaped partition plate 23 along the stirring tube 22 towards the side closer to the hollow main shaft 21, ultimately causing the sidewalls of two adjacent arc-shaped partition plates 23 to abut against each other, forming a tubular channel. At this time, the interior of the treatment tank 1 is divided into two chambers, which can be used for indirect heating. The heating medium is delivered from the heat medium inlet 13 into the tubular channel, and the soil to be treated is delivered through the soil inlet 12 into the area between the tubular channel and the sidewall of the treatment tank 1. The tubular channel separates the medium from the soil. Simultaneously, the agent is added to the hollow main shaft 21, which transports the agent to the mixing tube 22, and finally discharges it into the soil through the first row of discharge holes 221, thus enabling thermal desorption treatment. During this process, the drive unit 4 drives the hollow main shaft 21 to rotate synchronously, which in turn drives the mixing tube 22 and the arc-shaped partition plate 23 to rotate synchronously. The mixing tube 22 mixes and stirs the soil, resulting in more thorough and uniform heating.

[0030] When direct heating is selected, the control unit simply moves each arc-shaped partition plate 23 away from the hollow main shaft 21, transforming the interior of the treatment tank 1 into a complete chamber suitable for direct heating. During this process, the arc-shaped partition plates 23 also function as mixing components, stirring and mixing the soil to accelerate the thermal desorption process.

[0031] like Figure 2 and Figure 7 As shown, in a preferred embodiment of the present invention, the drive unit 4 includes a drive motor 41 mounted on the top of the processing tank 1. The output end of the drive motor 41 is connected to a drive shaft 42. A drive gear 43 is sleeved on the drive shaft 42, and a transmission gear 44 that meshes with the drive gear 43 is mounted on the top of the hollow main shaft 21.

[0032] In this embodiment of the invention, when in use, simply start the drive motor 41. The drive motor 41 can drive the drive shaft 42 to rotate, and the drive shaft 42 can drive the drive gear 43 to rotate. Through the cooperation of the drive gear 43 and the transmission gear 44, the hollow main shaft 21 can be driven to rotate.

[0033] like Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, in a preferred embodiment of the present invention, the control unit includes a sliding sleeve 24 slidably mounted on the hollow main shaft 21 along the axial direction of the hollow main shaft 21, and an adjusting rod 25 hinged to the inner wall of each arc-shaped partition plate 23 (the side of the arc-shaped partition plate 23 closest to the hollow main shaft 21 is defined as the inner side). The end of the adjusting rod 25 away from the arc-shaped partition plate 23 is hinged to the sliding sleeve 24. The top of the processing tank 1 is also provided with a telescopic unit 3 for driving the sliding sleeve 24 to move linearly along the axial direction of the hollow main shaft 21.

[0034] In this embodiment of the invention, the sliding sleeve 24 can rotate synchronously with the hollow main shaft 21. In use, the driving unit 4 drives the sliding sleeve 24 to slide along the axial direction of the hollow main shaft 21. The sliding sleeve 24 drives each adjusting rod 25 to move synchronously, and the adjusting rods 25 push the arc-shaped partition plates 23 to slide along the corresponding stirring tubes 22 (i.e., the radial direction of the hollow main shaft 21). When the distance between each arc-shaped partition plate 23 and the axis of the hollow main shaft 21 is at its minimum, the sidewalls of two adjacent arc-shaped partition plates 23 abut against each other, and each arc-shaped partition plate 23 cooperates to form a tubular channel. At this time, the interior of the processing tank 1 is divided into two chambers, which can be used for indirect heating. When the adjusting rods 25 push each arc-shaped partition plate 23 to move away from the hollow main shaft 21, the interior of the processing tank 1 becomes a complete chamber, which can then be used for direct heating.

[0035] like Figure 2 and Figure 7 As shown, in a preferred embodiment of the present invention, the telescopic unit 3 includes a telescopic member 31 installed on the top of the processing barrel 1. The telescopic end of the telescopic member 31 is equipped with a connecting seat 32, and the connecting seat 32 is sleeved on the connecting plate 2 drive motor 41 provided on the top of the sliding sleeve 24.

[0036] In this embodiment of the invention, the telescopic member 31 is a hydraulic telescopic rod. In use, simply control the telescopic member 31 to extend or retract. The telescopic member 31 can drive the connecting seat 32 to move synchronously. Through the cooperation between the connecting seat 32 and the connecting plate 2 drive motor 41, the sliding sleeve 24 can be driven to move linearly along the axial direction of the hollow main shaft 21 synchronously.

[0037] like Figures 3-6 As shown, in a preferred embodiment of the present invention, the stirring tube 22 has a second row of medicine holes 222 in the region inside the tubular channel. A sealing sleeve 26 is also provided on the inner wall of the arc-shaped partition plate 23. The sealing sleeve 26 is fitted onto the stirring tube 22 and has a mating hole 261. When the distance between the arc-shaped partition plate 23 and the axis of the hollow main shaft 21 is at its minimum, the mating hole 261 will be misaligned with the second row of medicine holes 222, and the sealing sleeve 26 will block the second row of medicine holes 222. In this state, for indirect heating, the medicine can only be discharged into the processing tank 1 through the first row of medicine holes 221. As the arc-shaped partition plate 23 moves away from the hollow main shaft 21, the sealing sleeve 26 will move synchronously, causing the mating hole 261 to coincide with the second row of medicine holes 222. At this time, direct heating is used, and the medicine can enter the processing tank 1 simultaneously through the first row of medicine holes 221 and the second row of medicine holes 222, so that the medicine can be added to the processing tank 1 more evenly.

[0038] Working Principle: During use, the heating state can be flexibly switched according to usage requirements. Specifically, when indirect heating is selected, simply control the telescopic component 31 to retract. The telescopic component 31 drives the connecting seat 32 to move synchronously. Through the cooperation of the connecting seat 32 and the connecting plate 2 drive motor 41, the sliding sleeve 24 can be driven to move linearly along the axial direction of the hollow main shaft 21. The sliding sleeve 24 can drive each adjusting rod 25 to move synchronously. Through the adjusting rod 25, the arc-shaped partition plate 23 can be pushed along the stirring tube 22 towards the side closer to the hollow main shaft 21, ultimately causing the side walls of two adjacent arc-shaped partition plates 23 to abut against each other, forming a tubular channel. At this time, the interior of the treatment tank 1 is divided into two chambers, which can be used for indirect heating. The heating medium is delivered into the tubular channel from the heat medium inlet 13, and the soil to be treated is delivered into the area between the tubular channel and the side wall of the treatment tank 1 through the soil inlet 12. The tubular channel separates the medium from the soil. Simultaneously, the agent is added to the hollow main shaft 21, which transports the agent to the mixing tube 22, and finally discharges it into the soil through the first row of discharge holes 221, thus enabling thermal desorption treatment. During this process, the drive motor 41 drives the drive shaft 42 to rotate, which in turn drives the drive gear 43. The engagement of the drive gear 43 and the transmission gear 44 drives the hollow main shaft 21 to rotate, which in turn drives the mixing tube 22 and the arc-shaped partition plate 23 to rotate synchronously. The mixing tube 22 mixes and stirs the soil, resulting in more thorough and uniform heating.

[0039] When direct heating is selected, the control unit simply moves each arc-shaped partition plate 23 away from the hollow main shaft 21, transforming the interior of the treatment tank 1 into a complete chamber suitable for direct heating. During this process, the arc-shaped partition plates 23 also function as mixing components, stirring and mixing the soil to accelerate the thermal desorption process.

[0040] 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 saline-alkali soil remediation, characterized in that, The system includes a treatment tank mounted on a mounting frame, the top of which is provided with a soil inlet and a heat medium inlet; it also includes: The separation module includes a hollow main shaft installed inside a processing tank. The top of the hollow main shaft penetrates the top wall of the processing tank, and a drive unit for driving the hollow main shaft to rotate is installed on the top of the processing tank. Several stirring tubes are arranged in a ring around the area of ​​the hollow main shaft inside the processing tank, and the stirring tubes are connected to the interior of the hollow main shaft. Several arc-shaped partition plates are also arranged in a ring around the hollow main shaft. The arc-shaped partition plates are sleeved on the stirring tubes and can move radially along the hollow main shaft. A control unit is also provided on the stirring tube for driving each arc-shaped partition plate to move linearly and synchronously along the radial direction of the hollow main shaft. When the distance between each of the arc-shaped partition plates and the axis of the hollow main shaft is the smallest, the side walls of two adjacent arc-shaped partition plates abut against each other, and each arc-shaped partition plate cooperates to form a tubular channel. The stirring tube is provided with several first row of medicine holes in the area outside the tube. The interior of the processing tank is divided into two chambers for indirect heating. The control unit includes a sliding sleeve that is slidably mounted on the hollow main shaft along the axial direction of the hollow main shaft, and an adjusting rod that is hinged to the inner side wall of each arc-shaped partition plate. The end of the adjusting rod away from the arc-shaped partition plate is hinged to the sliding sleeve. The top of the processing barrel is also provided with a telescopic unit for driving the sliding sleeve to move linearly along the axial direction of the hollow main shaft. The stirring tube is provided with a second row of medicine holes in the area inside the tubular channel. A sealing sleeve is also provided on the inner wall of the arc-shaped partition plate. The sealing sleeve is sleeved on the stirring tube and has a mating hole. When the distance between the arc-shaped partition plate and the axis of the hollow main shaft is at its minimum, the mating hole will be misaligned with the second row of medicine holes, and the sealing sleeve will block the second row of medicine holes. The area where the heat medium inlet connects to the inside of the treatment tank is located inside the tubular channel, while the area where the soil inlet connects to the inside of the treatment tank is located outside the tubular channel. When direct heating is performed, the control unit drives each arc-shaped partition plate to move away from the hollow main shaft, and the inside of the processing barrel becomes a complete chamber for direct heating.

2. The thermal desorption equipment for saline-alkali soil remediation according to claim 1, characterized in that, The drive unit includes a drive motor mounted on the top of the processing tank. The output end of the drive motor is connected to a drive shaft. A drive gear is sleeved on the drive shaft, and a transmission gear that meshes with the drive gear is mounted on the top of the hollow main shaft.

3. The thermal desorption equipment for saline-alkali soil remediation according to claim 1, characterized in that, The telescopic unit includes a telescopic component installed on the top of the processing tank. The telescopic end of the telescopic component is equipped with a connecting seat, and the connecting seat is sleeved on the connecting card platform drive motor provided on the top of the sliding sleeve.

4. The thermal desorption equipment for saline-alkali soil remediation according to claim 3, characterized in that, The telescopic component is a hydraulic telescopic rod.

Images