Thermal desorption equipment for saline-alkali soil remediation

Abstract

The invention is applicable to the technical field of soil remediation, and provides 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 mounted in the treatment barrel, and the top of the hollow main shaft penetrates through the top wall of the treatment barrel; a driving unit used for driving the hollow main shaft to rotate is installed at the top of the treatment barrel, a plurality of stirring pipes are annularly installed in the area, located in the treatment barrel, of the hollow main shaft, the stirring pipes communicate with the interior of the hollow main shaft, and a plurality of arc-shaped partition plates are further annularly arranged on the periphery of the hollow main shaft; the arc-shaped partition plates are arranged on the stirring pipe in a sleeving mode and can move in the radial direction of the hollow main shaft, and the stirring pipe is further provided with a control unit used for driving the arc-shaped partition plates to linearly move in the radial direction of the hollow main shaft synchronously. The state of the device is flexible and adjustable, soil to be treated can be fully stirred and mixed, the working efficiency is high, and the using effect is good.

Description

Technical Field

[0001] The present invention belongs to the technical field of soil remediation, and particularly relates to a thermal desorption device for saline-alkali soil remediation. Background Art

[0003] The thermal desorption device for soil remediation is a non-combustion device that volatilizes and separates organic pollutants by heating the soil. The core principle of the thermal desorption device is to heat the soil above the boiling point of the pollutants (usually 150 - 550 °C) through direct or indirect heat exchange, so that the pollutants are vaporized and volatilized, and then are condensed, filtered, etc. through a gas collection system.

[0004] There are two ways of direct heating and indirect heating for soil thermal desorption. For existing thermal desorption devices, most of them only have one heating method and cannot flexibly switch between the two heating methods, which limits the application range of the thermal desorption device and is not conducive to treating different saline-alkali soils. Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to provide a thermal desorption device for saline-alkali soil remediation, aiming to solve the problems proposed in the above background art.

[0006] The embodiments of the present invention are implemented as follows. A thermal desorption device for saline-alkali soil remediation includes a treatment barrel, the treatment barrel is installed on a mounting frame, and a soil addition port and a heat medium addition port are provided at the top of the treatment barrel; further includes: A separation module, the separation module includes a hollow main shaft installed inside the treatment barrel, the top of the hollow main shaft penetrates through the top wall of the treatment barrel, and a driving unit for driving the hollow main shaft to rotate is installed at the top of the treatment barrel. A plurality of stirring pipes are annularly installed in the area of the hollow main shaft inside the treatment barrel, and the stirring pipes are communicated with the inside of the hollow main shaft. A plurality of arc-shaped separation plates are also annularly arranged around the hollow main shaft. The arc-shaped separation plates are sleeved on the stirring pipes and can move radially along the hollow main shaft. A control unit for driving each arc-shaped separation plate to linearly move synchronously along the radial direction of the hollow main shaft is also provided on the stirring pipes; When the distance between each arc-shaped separation plate and the axis of the hollow main shaft is the smallest, the side walls of two adjacent arc-shaped separation plates are in contact with each other, and each arc-shaped separation plate cooperates with each other to form a tubular channel, and a plurality of first medicine holes are opened in the area of the stirring pipe located outside the tubular channel.

[0007] Further technical solution, the area where the heat medium addition port is communicated with the inside of the treatment barrel is located inside the tubular channel, and the area where the soil addition port is communicated with the inside of the treatment barrel is located outside the tubular channel.

[0008] Further technical solution: The driving unit includes a driving motor installed at the top of the processing barrel. The output end of the driving motor is connected to a driving shaft. A driving gear is sleeved on the driving shaft, and a transmission gear meshing with the driving gear is installed at the top of the hollow main shaft.

[0009] Further technical solution: The control unit includes a sliding sleeve slidably installed on the hollow main shaft along the axial direction of the hollow main shaft, and an adjusting link hinged to the inner side wall of each arc-shaped partition plate (defining the side close to the hollow main shaft as the inner side). The end of the adjusting link away from the arc-shaped partition plate is hinged to the sliding sleeve. A telescopic unit for driving the sliding sleeve to linearly move along the axial direction of the hollow main shaft is further provided at the top of the processing barrel.

[0010] Further technical solution: The telescopic unit includes a telescopic member installed at the top of the processing barrel. The telescopic end of the telescopic member is installed with a connecting seat, and the connecting seat is sleeved on the connecting chuck driving motor arranged at the top of the sliding sleeve.

[0011] Further technical solution: The telescopic member is a hydraulic telescopic rod.

[0012] Further technical solution: Second medicine discharging holes are formed in the area of the stirring pipe located inside the tubular channel. A blocking sleeve is further arranged on the inner side wall of the arc-shaped partition plate. The blocking sleeve is sleeved on the stirring pipe, and a matching hole is formed in the blocking sleeve; When the distance between the arc-shaped partition plate and the axis of the hollow main shaft is the smallest, the matching hole will be misaligned with the second medicine discharging holes, and the blocking sleeve will block the second medicine discharging holes.

[0013] A thermal desorption device for saline-alkali soil remediation provided by an embodiment of the present invention can flexibly switch the heating state according to usage requirements when in use. Specifically, when indirect heating is to be selected, only the control unit needs to drive each arc-shaped partition plate to move along the stirring tube towards the side close to the hollow main shaft, and finally the side walls of two adjacent arc-shaped partition plates are in contact with each other. Each arc-shaped partition plate cooperates with each other to form a tubular channel. At this time, the inside of the treatment barrel is divided into two chambers, which can be used for indirect heating. The heating medium is transported into the tubular channel from the heat medium addition port, and the soil to be treated is transported into the area between the tubular channel and the side wall of the treatment barrel through the soil addition port. The medium and the soil are separated by the tubular channel. At the same time, the medicament is added into the hollow main shaft, and the medicament can be transported to the stirring tube through the hollow main shaft and finally discharged into the soil through the first row of medicine holes, and then the thermal desorption treatment can be carried out. During this process, the driving unit can drive the hollow main shaft to rotate synchronously, and the hollow main shaft can drive the stirring tube and the arc-shaped partition plates to rotate synchronously. The soil can be mixed and stirred through the stirring tube, so that the heating is more sufficient and uniform. When direct heating is to be selected, only the control unit needs to drive each arc-shaped partition plate to move away from the hollow main shaft, and then the inside of the treatment barrel will become a complete chamber, which can be used for direct heating at this time. During this process, the arc-shaped partition plates can also be used as stirring components to stir and mix the soil, accelerating the thermal desorption process. The state of the device is flexibly adjustable, and the soil to be treated can be fully stirred and mixed, with high working efficiency and good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of a thermal desorption device for saline-alkali soil remediation provided by an embodiment of the present invention; Figure 2 is a schematic structural diagram of another perspective of a thermal desorption device for saline-alkali soil remediation provided by an embodiment of the present invention; Figure 3 is a schematic structural diagram of a separation module in a thermal desorption device for saline-alkali soil remediation provided by an embodiment of the present invention; Figure 4 is a partial schematic structural diagram of a separation module in a thermal desorption device for saline-alkali soil remediation provided by an embodiment of the present invention; Figure 5 is a schematic structural diagram of a hollow main shaft in a thermal desorption device for saline-alkali soil remediation provided by an embodiment of the present invention; Figure 6 is a schematic structural diagram of an arc-shaped partition plate in a thermal desorption device for saline-alkali soil remediation provided by an embodiment of the present invention; Figure 7 is Figure 2 an enlarged view of part A in

[0015] In the attached drawings: treatment barrel 1; mounting frame 11; soil addition port 12; heat medium addition port 13; separation module 2; hollow main shaft 21; stirring pipe 22; first row of medicine holes 221; second row of medicine holes 222; arc-shaped separation plate 23; sliding sleeve 24; connecting clamping table 2; driving motor 41; adjusting connecting rod 25; plugging sleeve 26; matching hole 261; telescopic unit 3; telescopic member 31; connecting seat 32; driving unit 4; driving motor 41; driving shaft 42; driving gear 43; transmission gear 44. Specific implementation mode

[0016] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0017] The specific implementation of the present invention will be described in detail below in combination with specific embodiments.

[0018] As Figures 1 - 5 shown, a thermal desorption device for saline-alkali soil remediation provided by an embodiment of the present invention includes a treatment barrel 1, the treatment barrel 1 is installed on a mounting frame 11, and a soil addition port 12 and a heat medium addition port 13 are provided at the top of the treatment barrel 1; further includes: A separation module 2, the separation module 2 includes a hollow main shaft 21 installed inside the treatment barrel 1, the top of the hollow main shaft 21 penetrates through the top wall of the treatment barrel 1, and a driving unit 4 for driving the hollow main shaft 21 to rotate is installed at the top of the treatment barrel 1. A plurality of stirring pipes 22 are annularly installed in the area of the hollow main shaft 21 inside the treatment barrel 1, and the stirring pipes 22 are communicated with the inside of the hollow main shaft 21. A plurality of arc-shaped separation plates 23 are also annularly arranged around the hollow main shaft 21. The arc-shaped separation plates 23 are sleeved on the stirring pipes 22 and can move along the radial direction of the hollow main shaft 21. A control unit for driving each arc-shaped separation plate 23 to linearly move synchronously along the radial direction of the hollow main shaft 21 is also provided on the stirring pipes 22; When the distance between each arc-shaped separation plate 23 and the axis of the hollow main shaft 21 is the smallest, the side walls of two adjacent arc-shaped separation plates 23 are in contact with each other, and each arc-shaped separation plate 23 cooperates with each other to form a tubular channel, and a plurality of first row of medicine holes 221 are provided in the area of the stirring pipe 22 located outside the tubular channel.

[0019] In an embodiment of the present invention, the area where the heat medium addition port 13 communicates with the inside of the treatment barrel 1 is located inside the tubular channel, and the area where the soil addition port 12 communicates with the inside of the treatment barrel 1 is located outside the tubular channel. During use, the heating state can be flexibly switched according to the usage requirements. Specifically, when indirect heating is to be selected, only the control unit needs to drive each arc-shaped partition plate 23 to move along the stirring tube 22 towards the side close to the hollow main shaft 21, and finally the side walls of two adjacent arc-shaped partition plates 23 are in contact with each other, and each arc-shaped partition plate 23 cooperates with each other to form a tubular channel. At this time, the inside of the treatment barrel 1 is divided into two chambers, which can be used for indirect heating. The heating medium is transported into the tubular channel from the heat medium addition port 13, and the soil to be treated is transported into the area between the tubular channel and the side wall of the treatment barrel 1 through the soil addition port 12. The medium and the soil are separated by the tubular channel. At the same time, the medicament is added into the hollow main shaft 21, and the medicament can be transported to the stirring tube 22 through the hollow main shaft 21 and finally discharged into the soil through the first row of medicine holes 221, and then the thermal desorption treatment can be carried out. During this process, the driving unit 4 can drive the hollow main shaft 21 to rotate synchronously, and the hollow main shaft 21 can drive the stirring tube 22 and the arc-shaped partition plates 23 to rotate synchronously. The soil can be mixed and stirred through the stirring tube 22, so that the heating is more sufficient and uniform.

[0020] When direct heating is to be selected, only the control unit needs to drive each arc-shaped partition plate 23 to move away from the hollow main shaft 21, and then the inside of the treatment barrel 1 will become a complete chamber, which can be used for direct heating at this time. During this process, the arc-shaped partition plate 23 can also be used as a stirring component to stir and mix the soil, accelerating the process of thermal desorption.

[0021] As Figure 2 and Figure 7 shown, as a preferred embodiment of the present invention, the driving unit 4 includes a driving motor 41 installed on the top of the treatment barrel 1, the output end of the driving motor 41 is connected with a driving shaft 42, a driving gear 43 is sleeved on the driving shaft 42, and a transmission gear 44 meshing with the driving gear 43 is installed on the top of the hollow main shaft 21.

[0022] In an embodiment of the present invention, during use, only the driving motor 41 needs to be started, the driving motor 41 can drive the driving shaft 42 to rotate, the driving shaft 42 can drive the driving gear 43 to rotate, and through the cooperation of the driving gear 43 and the transmission gear 44, the hollow main shaft 21 can be driven to rotate.

[0023] As Figure 2 , Figure 3 , Figure 4 and Figure 7As shown, as 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 link 25 hinged to the inner side wall of each arc-shaped partition plate 23 (defining the side of the arc-shaped partition plate 23 close to the hollow main shaft 21 as the inner side). The end of the adjusting link 25 away from the arc-shaped partition plate 23 is hinged to the sliding sleeve 24. A telescopic unit 3 for driving the sliding sleeve 24 to linearly move along the axial direction of the hollow main shaft 21 is further provided at the top of the treatment barrel 1.

[0024] In the embodiment of the present invention, the sliding sleeve 24 can rotate synchronously with the hollow main shaft 21. During use, the driving unit 4 can drive the sliding sleeve 24 to slide along the axial direction of the hollow main shaft 21. The sliding sleeve 24 can drive each adjusting link 25 to move synchronously. The arc-shaped partition plate 23 can be pushed to slide along the corresponding stirring tube 22 (i.e., the radial direction of the hollow main shaft 21) through the adjusting link 25. When the distance between each 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 are in contact with each other, and each arc-shaped partition plate 23 cooperates with each other to form a tubular channel. At this time, the inside of the treatment barrel 1 is divided into two chambers, which can be used for indirect heating. When the adjusting link 25 pushes each arc-shaped partition plate 23 to move to the side away from the hollow main shaft 21, the inside of the treatment barrel 1 will become a complete chamber, and at this time, it can be used for direct heating.

[0025] As Figure 2 and Figure 7 As shown, as a preferred embodiment of the present invention, the telescopic unit 3 includes a telescopic member 31 installed at the top of the treatment barrel 1. A connecting seat 32 is installed at the telescopic end of the telescopic member 31, and the connecting seat 32 is sleeved on the connecting chuck 2 driving motor 41 provided at the top of the sliding sleeve 24.

[0026] In the embodiment of the present invention, the telescopic member 31 is a hydraulic telescopic rod. During use, only need to control the telescopic member 31 to expand and contract. The telescopic member 31 can drive the connecting seat 32 to move synchronously. Through the cooperation of the connecting seat 32 and the connecting chuck 2 driving motor 41, the sliding sleeve 24 can be driven to linearly move along the axial direction of the hollow main shaft 21 synchronously.

[0027] As Figures 3 - 6As shown, as a preferred embodiment of the present invention, the area of the stirring tube 22 located inside the tubular channel is provided with second medicine discharging holes 222. A plugging sleeve 26 is further arranged on the inner side wall of the arc-shaped partition plate 23. The plugging sleeve 26 is sleeved on the stirring tube 22, and a matching hole 261 is opened on the plugging sleeve 26. When the distance between the arc-shaped partition plate 23 and the axis of the hollow main shaft 21 is the smallest, the matching hole 261 will be misaligned with the second medicine discharging holes 222, and the plugging sleeve 26 will plug the second medicine discharging holes 222. In this state, for indirect heating, the medicine can only be discharged into the treatment barrel 1 through the first medicine discharging holes 221. As the arc-shaped partition plate 23 moves away from the hollow main shaft 21, the plugging sleeve 26 will move synchronously therewith, so that the matching hole 261 coincides with the second medicine discharging holes 222. At this time, for direct heating, the medicine can enter the treatment barrel 1 through the first medicine discharging holes 221 and the second medicine discharging holes 222 at the same time, making the medicine added to the treatment barrel 1 more evenly.

[0028] Working principle: During use, the heating state can be flexibly switched according to the use requirements. Specifically, when indirect heating is to be selected, only need to control the telescopic member 31 to contract. The telescopic member 31 can drive the connecting seat 32 to move synchronously. Through the cooperation of the connecting seat 32 and the connecting clamping platform 2 to drive the motor 41, the sliding sleeve 24 can be driven to linearly move along the axial direction of the hollow main shaft 21 synchronously. The sliding sleeve 24 can drive each adjusting connecting rod 25 to move synchronously. Through the adjusting connecting rod 25, the arc-shaped partition plate 23 can be pushed to move along the stirring tube 22 towards the side close to the hollow main shaft 21, and finally the side walls of two adjacent arc-shaped partition plates 23 are in contact with each other. Each arc-shaped partition plate 23 cooperates with each other to form a tubular channel. At this time, the inside of the treatment barrel 1 is divided into two chambers, which can be used for indirect heating. The heating medium is conveyed into the tubular channel from the heat medium adding port 13, and the soil to be treated is conveyed into the area between the tubular channel and the side wall of the treatment barrel 1 through the soil adding port 12. The medium and the soil are separated by the tubular channel. At the same time, the medicine is added into the hollow main shaft 21. The medicine can be conveyed to the stirring tube 22 through the hollow main shaft 21 and finally discharged into the soil through the first medicine discharging holes 221, and then the thermal desorption treatment can be carried out. During this process, the driving motor 41 can drive the driving shaft 42 to rotate, the driving shaft 42 can drive the driving gear 43 to rotate. Through the cooperation of the driving gear 43 and the transmission gear 44, the hollow main shaft 21 can be driven to rotate. The hollow main shaft 21 can drive the stirring tube 22 and the arc-shaped partition plate 23 to rotate synchronously. The soil can be mixed and stirred through the stirring tube 22, so that the heating is more sufficient and uniform.

[0029] When direct heating is to be selected, after the control unit drives each arc-shaped partition plate 23 to move away from the hollow main shaft 21, the inside of the treatment barrel 1 will become a complete chamber, and at this time, it can be used for direct heating. During this process, the arc-shaped partition plate 23 can also be used as a stirring component to stir and mix the soil, accelerating the process of thermal desorption.

[0030] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A thermal desorption device for saline-alkali soil remediation, characterized in that, It includes a processing barrel, which is installed on a mounting frame. A soil addition port and a heat medium addition port are provided at the top of the processing barrel; it further includes: A separation module, which includes a hollow main shaft installed inside the processing barrel. The top of the hollow main shaft penetrates the top wall of the processing barrel, and a driving unit for driving the hollow main shaft to rotate is installed at the top of the processing barrel. A number of stirring pipes are annularly installed in the area of the hollow main shaft inside the processing barrel, and the stirring pipes are communicated with the inside of the hollow main shaft. A number of arc-shaped partition plates are also annularly arranged around the hollow main shaft. The arc-shaped partition plates are sleeved on the stirring pipes and can move radially along the hollow main shaft. A control unit for driving each arc-shaped partition plate to linearly move synchronously along the radial direction of the hollow main shaft is also provided on the stirring pipes; When the distance between each arc-shaped partition plate and the axis of the hollow main shaft is the smallest, the side walls of two adjacent arc-shaped partition plates are in contact with each other. Each arc-shaped partition plate cooperates to form a tubular channel, and a number of first medicine discharge holes are provided in the area of the stirring pipe located outside the tubular channel.

2. The thermal desorption device for saline-alkali soil remediation according to claim 1, characterized in that The area where the heat medium addition port is communicated with the inside of the processing barrel is located inside the tubular channel, and the area where the soil addition port is communicated with the inside of the processing barrel is located outside the tubular channel.

3. The thermal desorption device for saline-alkali soil remediation according to claim 1, characterized in that, The driving unit includes a driving motor installed at the top of the processing barrel. The output end of the driving motor is connected with a driving shaft. A driving gear is sleeved on the driving shaft, and a transmission gear meshing with the driving gear is installed at the top of the hollow main shaft.

4. The thermal desorption device for saline-alkali soil remediation according to claim 1, wherein The control unit includes a sliding sleeve slidably installed on the hollow main shaft along the axial direction of the hollow main shaft, and an adjusting connecting rod hinged to the inner side wall of each arc-shaped partition plate. The end of the adjusting connecting rod away from the arc-shaped partition plate is hinged to the sliding sleeve. A telescopic unit for driving the sliding sleeve to linearly move along the axial direction of the hollow main shaft is also provided at the top of the processing barrel.

5. The thermal desorption device for saline-alkali soil remediation according to claim 4, characterized in that The telescopic unit includes a telescopic member installed at the top of the processing barrel. The telescopic end of the telescopic member is installed with a connecting seat, and the connecting seat is sleeved on the connecting chuck driving motor arranged at the top of the sliding sleeve.

6. The thermal desorption device for saline-alkali soil remediation according to claim 5, wherein The telescopic member is a hydraulic telescopic rod.

7. The thermal desorption device for saline-alkali soil remediation according to claim 1, wherein A number of second medicine discharge holes are provided in the area of the stirring pipe located inside the tubular channel. 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 pipe, and a matching hole is provided on the sealing sleeve; When the distance between the arc-shaped partition plate and the axis of the hollow main shaft is the smallest, the matching hole will be misaligned with the second medicine discharge hole, and the sealing sleeve will block the second medicine discharge hole.

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