Thermal desorption purification device for polluted soil

Abstract

The utility model discloses a polluted soil thermal desorption purification device, which relates to the technical field of polluted soil treatment and comprises a thermal treatment box and a crushing box, the crushing box is mounted at the top of the thermal treatment box, and a screening mechanism is mounted in the thermal treatment box. Small soil blocks fall on the screen, the double-shaft motor drives the crank to drive the screen to shake in a circular motion mode, screening of the soil blocks is achieved, the elastic steel sheet below the screen provides stable support for the screen and buffers and resets in the shaking process, it is ensured that the screening process is continuous and efficient, and the process refines contaminated soil into small soil blocks suitable for thermal desorption and also improves the soil quality. The treatment efficiency is improved, the uniform and thorough purification effect is also ensured, the whole operation process is rapid and efficient, and the soil treatment flow is favorably optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of contaminated soil treatment, in particular to a contaminated soil thermal desorption and purification device. Background Art

[0002] With the public's gradual understanding of the environmental and health hazards of organic pollutants, there is an urgent need for economical and effective methods to treat these toxic substances. The main remediation technologies for soil contaminated by organic pollutants include bioremediation, chemical remediation, physical remediation, etc.

[0003] For example, the publicly disclosed CN220861597U discloses a soil pollution treatment device including a cylinder body. A cylinder is arranged inside the cylinder body. The sliding end of the cylinder is rotatably connected to a turntable. A driver for driving the turntable is arranged on the outer wall of the sliding rod of the cylinder. A plurality of pressing wheels and heating plates are arranged on the outer wall of the turntable. A screening plate is arranged at the bottom of the cylinder body below the turntable. A discharge door is arranged on the outer wall of the cylinder body at the top of the screening plate.

[0004] However, in the prior art, when directly treating contaminated soil, if there are large soil blocks piled up in the soil, the pollutants inside these soil blocks are usually more difficult to be completely removed or degraded. This will not only prolong the treatment process time, thereby reducing the overall treatment efficiency, but also due to the large size of the soil blocks, the distribution of pollutants inside them is uneven, resulting in differences in the pollutant removal effects of different parts during the treatment process. This uneven treatment effect will make the soil quality uneven and it is difficult to achieve the expected soil treatment and remediation effects. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problem in the prior art that the sizes of soil blocks are inconsistent, resulting in uneven soil quality after treatment, and to propose a contaminated soil thermal desorption and purification device.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: A contaminated soil thermal desorption and purification device includes a heat treatment box and a crushing box. The crushing box is installed on the top of the heat treatment box. A screening mechanism is installed inside the heat treatment box.

[0007] The screening mechanism includes a guide plate. Elastic steel sheets are fixedly connected to both sides of the guide plate. A sieve mesh is installed above the guide plate. The side wall of the sieve mesh is fixedly connected to the top of the elastic steel sheet. A double-shaft motor is installed on the top of the guide plate. Cranks are fixedly connected to both output ends of the double-shaft motor. One end of the crank is rotatably connected to a push rod. One end of the push rod is rotatably connected to a connecting rod. One end of the connecting rod is fixedly connected to the side wall of the sieve mesh.

[0008] Preferably, fixed rods are fixedly connected to both sides of the guide plate. The fixed rods are fixedly connected to the inner wall of the heat treatment box.

[0009] Preferably, a crushing frame is installed between the material guiding plate and the sieve, and a second reduction motor is installed on the side wall of the crushing frame.

[0010] Preferably, a conveyor belt is installed at the bottom end of the inner cavity of the heat treatment box, and one end of the conveyor belt extends out of the heat treatment box.

[0011] Preferably, side blades are fixedly connected to both sides of the inner cavity of the crushing box, and two crushing knives are installed between the side blades.

[0012] Preferably, a driven gear is rotatably connected to one side of the crushing box, and a driving gear is meshed and connected to one side of the driven gear.

[0013] Preferably, the driven gear and the driving gear are meshed and connected, a first reduction motor is installed on one side of the crushing box, and the output end of the first reduction motor is fixedly connected to one of the crushing knives.

[0014] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0015] 1. In the present utility model, the contaminated soil is poured into the crushing box and undergoes crushing treatment. The small soil blocks fall on the sieve, and the double-shaft motor drives the crank to drive the sieve to shake in a circular motion to realize the screening of the soil blocks. The elastic steel sheets below the sieve provide stable support for the sieve and buffer and reset during shaking, ensuring the continuous and efficient screening process. This process not only refines the contaminated soil into small soil blocks suitable for thermal desorption, improves the treatment efficiency, but also ensures the uniformity and thoroughness of the purification effect. The whole operation process is fast and efficient, which helps to optimize the soil treatment process.

[0016] 2. In the present utility model, a first reduction motor drives one of the crushing knives to rotate, its driving gear drives the driven gear and the other crushing knife to rotate, forming a double-knife crushing mechanism. The side blades assist in accelerating the crushing process. When the soil accumulates on the material guiding plate, the second reduction motor drives the crushing roller in the crushing frame to rotate for secondary crushing. The surface of the roller is covered with teeth or blades to roll and crush the soil and refine the soil particle size, improving the crushing effect. This double-crushing mechanism ensures that the soil is fully crushed before entering the subsequent treatment, laying a solid foundation for soil remediation. The whole process is efficient and effective, improving the efficiency and quality of soil treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of a contaminated soil thermal desorption and purification device proposed by the present utility model;

[0018] Figure 2 is a cross-sectional structural schematic diagram of a contaminated soil thermal desorption and purification device proposed by the present utility model;

[0019] Figure 3 This is a three-dimensional structural schematic diagram of a screening mechanism in a thermal desorption purification device for contaminated soil proposed by the present utility model;

[0020] Figure 4 This is a sectional three-dimensional structural schematic diagram of a thermal desorption purification device for contaminated soil proposed by the present utility model.

[0021] Legend: 1. Heat treatment box; 2. Crushing box; 21. Side blade; 22. Crushing knife; 23. Driven gear; 24. Driving gear; 25. First reduction motor; 3. Conveyor belt; 4. Screening mechanism; 41. Guide plate; 411. Fixed rod; 42. Biaxial motor; 43. Screen; 44. Elastic steel sheet; 45. Crank; 46. Push rod; 47. Connecting rod; 48. Crushing frame; 49. Second reduction motor. Detailed implementation manners

[0022] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the following further describes the present utility model with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0023] In the following description, many specific details are set forth to fully understand the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0024] Embodiment 1: As Figure 1 - Figure 3 shown, the present utility model provides a thermal desorption purification device for contaminated soil, including a heat treatment box 1 and a crushing box 2. The crushing box 2 is installed on the top of the heat treatment box 1, and a screening mechanism 4 is installed inside the heat treatment box 1;

[0025] The screening mechanism 4 includes a guide plate 41. Elastic steel sheets 44 are fixedly connected to both sides of the guide plate 41, and a screen 43 is installed above the guide plate 41. The side wall of the screen 43 is fixedly connected to the top of the elastic steel sheet 44. A biaxial motor 42 is installed on the top of the guide plate 41. Cranks 45 are fixedly connected to both output ends of the biaxial motor 42. One end of the crank 45 is rotatably connected to a push rod 46. One end of the push rod 46 is rotatably connected to a connecting rod 47. One end of the connecting rod 47 is fixedly connected to the side wall of the screen 43.

[0026] The following specifically describes the specific settings and functions of this embodiment. First, when the contaminated soil is poured into the crushing box 2. As the crushing process progresses, these small soil blocks will fall above the screen 43. Only the soil blocks that meet specific sizes can pass through the screen 43, while the larger soil blocks will be intercepted above.

[0027] The shaking of the sieve mesh 43 is achieved by a crank 45 driven by a biaxial motor 42. When the biaxial motor 42 is started, the crank 45 begins to perform circular motion centered on the motor output shaft. During this motion process, the crank 45 drives the sieve mesh 43 to shake through a push rod 46 and a connecting rod 47. This kind of shaking not only helps with the screening of soil clods but also can prevent the sieve mesh 43 from being blocked, ensuring the continuity and efficiency of the screening process.

[0028] Below the sieve mesh 43, elastic steel sheets 44 are also provided. These elastic steel sheets 44 not only have a certain elasticity but also can provide stable support for the sieve mesh 43. During the shaking process of the sieve mesh 43, the elastic steel sheets 44 play a role in buffering and resetting, ensuring that the sieve mesh 43 can maintain a stable motion trajectory and reducing the noise and wear generated due to vibration.

[0029] Through this series of crushing and screening processes, the contaminated soil is quickly and evenly refined into small soil clods suitable for thermal desorption purification. This not only improves the treatment efficiency but also ensures that the effect of thermal desorption purification is more uniform and thorough.

[0030] Embodiment Two: As Figure 3 and Figure 4 shown, fixed rods 411 are fixedly connected to both sides of the material guiding plate 41, and the fixed rods 411 are fixedly connected to the inner wall of the heat treatment box 1. A crushing frame 48 is installed between the material guiding plate 41 and the sieve mesh 43, and a second reduction motor 49 is installed on the side wall of the crushing frame 48. At the bottom end of the inner cavity of the heat treatment box 1, a conveyor belt 3 is installed, and one end of the conveyor belt 3 extends out of the heat treatment box 1. On both sides of the inner cavity of the crushing box 2, side blades 21 are fixedly connected, and two crushing knives 22 are installed between the side blades 21. One side of the crushing box 2 is rotatably connected to a driven gear 23, and one side of the driven gear 23 is meshed with a driving gear 24. The driven gear 23 and the driving gear 24 are meshed, and a first reduction motor 25 is installed on one side of the crushing box 2, and the output end of the first reduction motor 25 is fixedly connected to one of the crushing knives 22.

[0031] The overall effect achieved by this entire embodiment is that, first, when contaminated soil needs to be processed, the soil is fed into the crushing box 2. When the first reduction motor 25 starts to operate, it drives one of the crushing knives 22 to rotate through a power transmission mechanism. This rotating crushing knife 22 not only rotates itself, but the driving gear 24 at one end of it also rotates accordingly.

[0032] The rotation of the driving gear 24 is not isolated because it meshes with the driven gear 23 on another crushing knife 22. Therefore, when the driving gear 24 rotates, the driven gear 23 will also start to rotate under its drive. In this way, both of the two crushing knives 22 start to rotate.

[0033] As the two crushing blades 22 rotate, they work in cooperation with the side blades 21 to crush the soil. The design of the side blades 21 is such that when the soil is impacted by the rotating crushing blades 22, the process of soil fragmentation is accelerated.

[0034] When the soil accumulates on the surface of the material guiding plate 41, the second reduction motor 49 starts to operate, driving the crushing roller inside the crushing frame 48 to rotate.

[0035] This crushing roller is designed similar to a large drum, with its surface covered with protruding teeth or blades. When the crushing roller rotates driven by the second reduction motor 49, it continuously rolls and crushes the soil accumulated on the material guiding plate 41. This secondary crushing method can further refine the granularity of the soil and improve the crushing effect of the soil.

[0036] Through such a double crushing mechanism, we can ensure that the contaminated soil has been fully crushed and refined before entering the subsequent treatment process, thus laying a good foundation for the subsequent soil remediation work.

[0037] The usage method and working principle of this device: Pour the contaminated soil into the crushing box 2. After the first reduction motor 25 is started, it drives one of the crushing blades 22 to rotate, and then the driving gear 24 at one end of the crushing blade 22 rotates. Since the driven gear 23 meshes with the driving gear 24, the driven gear 23 will also rotate under the drive of the driving gear 24, thus ensuring that the two crushing blades 22 rotate simultaneously. With the assistance of the side blades 21, the two rotating crushing blades 22 can effectively crush the soil blocks.

[0038] The crushed small soil blocks then fall above the screen 43. Then, the biaxial motor 42 is started to drive the crank 45 to perform a circular motion. The motion of the crank 45 drives the push rod 46 to move, and the push rod 46 drives the screen 43 to shake through the connecting rod 47. This shaking enables the soil blocks on the screen 43 to be screened. During the screening process, the elastic steel sheet 44 enables the screen 43 to reset and remain stable due to its elasticity.

[0039] At the same time, when the soil accumulates on the surface of the material guiding plate 41, the second reduction motor 49 will start, driving the crushing roller inside the crushing frame 48 to rotate. The rotation of the crushing roller further rolls the soil to improve the overall crushing effect.

[0040] After crushing the large contaminated soil into small soil blocks, the thermal desorption purification work can be carried out quickly. This not only improves the treatment efficiency but also ensures the uniformity of the treatment.

[0041] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present utility model, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A thermal desorption purification device for contaminated soil, comprising a heat treatment box (1) and a crushing box (2), wherein the crushing box (2) is installed on the top of the heat treatment box (1), and is characterized in that: A screening mechanism (4) is installed inside the heat treatment box (1); The screening mechanism (4) includes a material guiding plate (41). Elastic steel sheets (44) are fixedly connected to both sides of the material guiding plate (41). A screen mesh (43) is installed above the material guiding plate (41). The side wall of the screen mesh (43) is fixedly connected to the top of the elastic steel sheet (44). A double-shaft motor (42) is installed on the top of the material guiding plate (41). Cranks (45) are fixedly connected to the output ends on both sides of the double-shaft motor (42). One end of each crank (45) is rotatably connected to a push rod (46). One end of the push rod (46) is rotatably connected to a connecting rod (47). One end of the connecting rod (47) is fixedly connected to the side wall of the screen mesh (43).

2. The thermal desorption purification device for contaminated soil according to claim 1, wherein: Fixed rods (411) are fixedly connected to both sides of the material guiding plate (41). The fixed rods (411) are fixedly connected to the inner wall of the heat treatment box (1).

3. The thermal desorption and purification device for contaminated soil according to claim 2, characterized in that: A crushing frame (48) is installed between the material guiding plate (41) and the screen mesh (43). A second reduction motor (49) is installed on the side wall of the crushing frame (48).

4. The thermal desorption and purification device for contaminated soil according to claim 3, wherein: A conveyor belt (3) is installed at the bottom end of the inner cavity of the heat treatment box (1). One end of the conveyor belt (3) extends out of the heat treatment box (1).

5. A contaminated soil thermal desorption purification device according to claim 1, characterized in that: Side blades (21) are fixedly connected to both sides of the inner cavity of the crushing box (2). Two crushing blades (22) are installed between the side blades (21).

6. The thermal desorption and purification device for contaminated soil according to claim 1, wherein: A driven gear (23) is rotatably connected to one side of the crushing box (2). The driven gear (23) is meshed with a driving gear (24) on one side.

7. A contaminated soil thermal desorption purification device according to claim 6, characterized in that: The driven gear (23) and the driving gear (24) are meshed. A first reduction motor (25) is installed on one side of the crushing box (2). The output end of the first reduction motor (25) is fixedly connected to one of the crushing blades (22).

Images