A soil remediation process and apparatus based on pure mechanical energy

Abstract

The application relates to the technical field of soil remediation, and discloses a soil remediation process and equipment based on pure mechanical energy and a soil remediation equipment based on pure mechanical energy, which comprises a remediation bin, a driving shaft is rotationally connected between the inner walls of the two ends of the remediation bin through a mounting seat, a protective shell is fixedly arranged on the outer wall of the driving shaft, and a plurality of groups of material stirring teeth are fixedly arranged on the outer wall of the protective shell at equal intervals; through the rotation of the material stirring teeth, the steel balls are stirred to collide with the soil in the remediation bin, high pressure and high temperature are generated in an instant, strong impact energy and heat energy are formed, the chemical bonds of the organic pollutants in the soil are broken, the soil pollutants are subjected to pure mechanical treatment, the secondary pollution problem caused by chemical agent treatment is effectively avoided, the harmless degradation of the pollutants is realized, and the environmental protection effect is improved; and the decomposition of the organic pollutants is catalyzed by the metal oxides generated on the surface of the steel balls due to friction, so that the degradation efficiency is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of soil remediation technology, specifically to a soil remediation process and equipment based on pure mechanical energy. Background Technology

[0002] Existing soil organic pollution remediation technologies mainly include chemical remediation, bioremediation, and thermal desorption, which have the following limitations: chemical remediation requires the addition of large amounts of chemical agents, resulting in high costs and a tendency to cause soil acidification and alkalization, as well as secondary chemical pollution; bioremediation relies on microbial metabolism, has stringent environmental requirements, and a long degradation cycle; thermal desorption requires an external heat source, consumes a lot of energy, may generate secondary pollutants such as dioxins at high temperatures, and suffers severe loss of organic matter in the soil, leading to a decline in soil fertility after remediation. Therefore, to address the shortcomings of the above-mentioned remediation technologies, a soil remediation process and equipment based on pure mechanical energy is proposed. Summary of the Invention

[0003] This invention provides a soil remediation device based on pure mechanical energy. Through the violent collision of steel balls with the soil, high pressure and high temperature are generated instantaneously, forming powerful impact energy and heat energy. This causes the chemical bonds of organic pollutants in the soil to break, achieving purely mechanical treatment of soil pollutants, realizing the harmless degradation of soil pollutants, improving environmental protection effects, and reducing treatment costs. Furthermore, the metal oxides generated on the surface of the steel balls due to friction catalyze the decomposition of organic pollutants, effectively improving degradation efficiency. This solves the problems mentioned in the background technology, such as high energy consumption, long cycle, and easy secondary pollution in soil remediation.

[0004] This invention provides the following technical solution: A soil remediation process based on pure mechanical energy, comprising the following steps: Step 1: Dry, sieve, and crush the soil to be repaired; Step 2: Use high temperature and high pressure to break the chemical bonds of organic pollutants in the soil; Step 3: Regulate the temperature inside the soil remediation equipment cavity by water cooling.

[0005] Step one specifically includes: The soil was subjected to a multi-stage drying process, including water control, natural drying, and low-temperature drying, to ensure that the soil moisture content was less than 10%. The soil to be repaired is passed through a vibrating screen with a 5mm aperture to remove stones, tree roots and other debris; A twin-shaft shredder is used to break large soil pieces down to ≤20mm in size; Lightweight impurities are separated by an air separator, reducing the soil impurity content to less than 1%. Step two specifically includes: The pretreated soil and steel balls were added into the cavity of the repair equipment at a mass ratio of 1:2 to 1:5. Start the repair equipment and process for 30-90 minutes to cause a violent collision between the soil and the steel balls; The high temperature and pressure generated during the collision cause the chemical bonds of organic pollutants in the soil to break.

[0006] A soil remediation device based on pure mechanical energy includes a remediation chamber. A drive shaft is rotatably connected between the inner walls of both ends of the remediation chamber via a mounting base. A protective shell is fixedly fitted onto the outer wall of the drive shaft. Multiple sets of material-feeding teeth are fixed at equal intervals on the outer wall of the protective shell. A spiral material guide groove is provided on the inner wall of the remediation chamber, and the remediation chamber is filled with steel balls. The device also includes: two sets of sealing chambers, each fixed to the outer wall of both ends of the remediation chamber. Both ends of the drive shaft pass through the two sets of sealing chambers, and a sealing element is provided inside the sealing chamber to fit against the outer wall of the drive shaft; a discharge section, located inside the remediation chamber, for discharging the remediated soil particles; and a water-cooling component, installed on the outer wall of the remediation chamber, for controlling the remediation temperature inside the chamber to prevent soil sintering.

[0007] As a preferred embodiment of the present invention, a guide hopper is fixedly connected to the inner end of the repair chamber, the drive shaft passes through the center of the repair chamber and is fixedly connected to a ramp guide plate, one end of the protective shell is attached to the lower end of the ramp guide plate, the other end of the protective shell is attached to the mounting seat side wall of the inner wall of the repair chamber, the output end of the guide hopper is connected to the inner cavity of the repair chamber, and a feed pipe is fixedly connected to the side wall of the repair chamber, the feed pipe is located directly above the guide hopper and is connected to its inner cavity.

[0008] As a preferred embodiment of the present invention, the discharge section includes a baffle plate, which is fixed to the inner wall of the repair chamber, and the baffle plate and the inner cavity end of the repair chamber form a discharge chamber. The baffle plate is sealed to the outer wall of the protective shell. A limiting guide ring is fixedly connected to the outer wall of the repair chamber. An adjusting groove is provided on the side wall of the repair chamber. An adjusting plate is attached to the side of the baffle plate near the discharge chamber. Connecting ears are fixedly connected to both sides of the adjusting plate. The connecting ears pass through the adjusting groove and are fixed in the empty groove of the limiting guide ring by bolts. Discharge grooves are provided on both sides of the baffle plate. Screening grooves are provided on both sides of the adjusting plate. When the adjusting plate rotates along the empty groove of the limiting guide ring, the screening groove and the discharge groove are connected, and the inner diameter of the connected area is smaller than the outer diameter of the steel ball.

[0009] As a preferred embodiment of the present invention, an exhaust pipe and a soil discharge pipe are fixedly connected to the outer wall of the repair chamber, both of which are connected to the inner cavity of the discharge chamber. The exhaust pipe is located at the top of the discharge chamber, while the soil discharge pipe is located at the bottom of the discharge chamber. A scraper is fixedly connected to the outer wall of the protective shell located inside the discharge chamber, and the end of the scraper is in contact with the inner wall of the discharge chamber.

[0010] As a preferred embodiment of the present invention, a rotating seat is installed on the side wall of the sealing chamber away from the repair chamber. The two ends of the drive shaft are respectively inserted into the rotating seats on both sides and rotate around their center. A drive motor is fixedly connected to the outer wall of the rotating seat on the side closer to the discharge chamber. The output end of the drive motor is fixedly connected to the end of the drive shaft.

[0011] As a preferred embodiment of the present invention, the sealing element includes a positioning ring, which is fixedly connected to the outer wall of the end of the repair chamber. A sealing ring is fixedly connected to the side wall of the positioning ring, and multiple layers of sealing gaskets are fixedly connected to the inner wall of the positioning ring. The sealing gaskets are sleeved on the outer wall of the drive shaft, and the central axes of the repair chamber, drive shaft, protective shell, sealing chamber and positioning ring coincide.

[0012] As a preferred embodiment of the present invention, the water-cooling assembly includes two sets of cooling chambers, both sets of cooling chambers are sleeved on the outer wall of the repair chamber, and the ends of the two sets of cooling chambers are fixedly connected by bolts. Water guide pipes are fixedly connected to the top and bottom of the inner cavity of the cooling chamber, and the water guide pipes are connected to the inner cavity of the cooling chamber. In addition, water injection pipes and drainage pipes that penetrate to the outside of the repair chamber are fixed and connected to the two water guide pipes in each set of cooling chambers.

[0013] Compared with existing technologies, the present invention provides a soil remediation process and equipment based on pure mechanical energy, which has the following beneficial effects: 1. This soil remediation equipment based on pure mechanical energy uses rotating teeth to cause steel balls to collide violently with the soil within the remediation chamber. This instantaneous high pressure and high temperature generate powerful impact and heat energy, breaking the chemical bonds of organic pollutants in the soil. This achieves purely mechanical treatment of soil pollutants, effectively avoiding secondary pollution problems caused by chemical treatments. It realizes the harmless degradation of soil pollutants, improves environmental protection, simplifies the process, and reduces treatment costs. Furthermore, the metal oxides generated on the surface of the steel balls due to friction catalyze the decomposition of organic pollutants, effectively improving degradation efficiency.

[0014] 2. This soil remediation equipment based on pure mechanical energy uses the high temperature generated by the collision of steel balls and soil particles to evaporate the water produced during the decomposition of organic matter. Combined with the high pressure generated inside the remediation chamber, the water vapor carries the soil particles scattered in the remediation chamber into the discharge chamber, where gas-solid separation is finally achieved, and the treated soil is discharged automatically, effectively improving the efficiency of soil remediation.

[0015] 3. This soil remediation equipment based on pure mechanical energy uses water injection pipes and water guide pipes to fill two sets of cooling chambers with cooling water to cool the remediation chambers. It also uses drainage pipes to discharge the water that has absorbed heat and heated up, thereby effectively controlling the temperature inside the remediation chambers and preventing the soil from sintering due to excessive temperature, thus improving the quality of soil remediation. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0017] Figure 1 This is a flowchart of the soil remediation process of the present invention; Figure 2 This is a three-dimensional schematic diagram of the soil remediation device of the present invention; Figure 3 This is a three-dimensional half-sectional schematic diagram of the soil remediation device of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram of region A in the middle; Figure 5 For the present invention Figure 3 A magnified schematic diagram of the central part of the structure; Figure 6 This is a schematic diagram of the internal structure of the discharge hopper of the present invention; Figure 7 This is a partial cross-sectional schematic diagram of the soil remediation device of the present invention; Figure 8 This is a schematic diagram of the baffle plate structure of the present invention; Figure 9 This is a schematic diagram of the adjustment plate structure of the present invention.

[0018] In the diagram: 1. Repair chamber; 2. Drive shaft; 21. Protective shell; 211. Scraper; 22. Feeding tooth; 23. Inclined guide plate; 3. Spiral guide trough; 31. Steel ball; 4. Sealing chamber; 41. Positioning ring; 42. Sealing ring; 43. Sealing gasket; 5. Guide chamber; 51. Feed pipe; 6. Baffle plate; 61. Discharge chamber; 62. Limiting guide ring; 621. Adjusting chute; 63. Adjusting plate; 631. Connecting ear; 64. Discharge trough; 65. Screening trough; 7. Exhaust pipe; 71. Soil discharge pipe; 8. Cooling chamber; 81. Water guide pipe; 811. Water injection pipe; 82. Drainage pipe; 9. Rotary seat; 91. Drive motor. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: Reference Figure 1 A soil remediation process based on pure mechanical energy, comprising the following steps: Step 1: Dry, sieve, and crush the soil to be repaired; Step 2: Use high temperature and high pressure to break the chemical bonds of organic pollutants in the soil; Step 3: Regulate the temperature inside the soil remediation equipment cavity by water cooling.

[0021] Step one specifically includes: The soil was subjected to a multi-stage drying process, including water control, natural drying, and low-temperature drying, to ensure that the soil moisture content was less than 10%. The soil to be repaired is passed through a vibrating screen with a 5mm aperture to remove stones, tree roots and other debris; A twin-shaft shredder is used to break large soil pieces down to ≤20mm in size; Lightweight impurities are separated by an air separator, reducing the soil impurity content to less than 1%. Step two specifically includes: The pretreated soil and steel balls were added into the cavity of the remediation equipment at a mass ratio of 1:3. The repair equipment was activated and processed for 60 minutes, causing a violent collision between the soil and the steel balls. The high temperature and pressure generated during the collision cause the chemical bonds of organic pollutants in the soil to break. Step 3 specifically includes: controlling the average temperature inside the repair equipment chamber to ≤200℃ by using jacket cooling water (inlet water temperature 20℃, outlet water temperature ≤90℃) to avoid soil sintering.

[0022] In addition, after the remediation treatment is completed, the treated soil is sampled and tested. If the residual pollutants exceed the standard (e.g., PAHs > 0.1 mg / kg), the soil is returned to the remediation equipment cavity for secondary treatment. If the soil treatment meets the standard, it is sprayed and stabilized before being transported to the backfill area for backfilling.

[0023] Example 2: Reference Figures 1-9 To achieve the soil remediation process described in Example 1, a soil remediation device based on pure mechanical energy is proposed, comprising a remediation chamber 1. The remediation chamber 1 adopts a double-layer jacket structure. The inner layer is made of highly wear-resistant tungsten carbide alloy with a thickness of 12-20mm, preferably 16mm, and the outer layer is a water-cooled stainless steel shell. The remediation chamber 1 is coated with a hard alloy coating with a thickness of 0.5-2mm, preferably 1mm. A drive shaft 2 is rotatably connected between the inner walls of the two ends of the remediation chamber 1 via a mounting base. A protective shell 21 is fixedly sleeved on the outer wall of the drive shaft 2. Multiple sets of feeding teeth 22 are fixed at equal intervals on the outer wall of the protective shell 21. A spiral guide groove 3 is provided on the inner wall of the remediation chamber 1. The spiral guide groove 3 has a pitch of 50-100mm and a depth of 10-15mm, preferably 80mm, and a depth of 12mm. The remediation chamber 1 is filled with steel balls 31 with a diameter of 5mm. Made of 15mm alloy steel (hardness HRC≥60), the steel ball 31 is preferably 10mm in diameter, and its linear velocity within the remediation chamber 1 is 100-300m / s, preferably 200m / s. The steel ball 31 moves along the spiral trajectory of the spiral guide trough 3, extending the collision path, increasing the collision probability and reaction time, thereby improving the soil remediation effect. The remediation chamber also includes: a sealing chamber 4, of which two sets are fixed to the outer walls at both ends of the remediation chamber 1. The two ends of the drive shaft 2 pass through the two sets of sealing chambers 4, and each sealing chamber 4 contains a seal that fits against the outer wall of the drive shaft 2; a discharge section, located within the remediation chamber 1, used to discharge the remediated soil particles; and a water-cooling component, installed on the outer wall of the remediation chamber 1, used to control the remediation temperature within the chamber and prevent soil sintering.

[0024] This equipment is placed horizontally, meaning that the repair chamber 1 is horizontal relative to the ground.

[0025] Reference Figure 2 , Figure 3A rotating seat 9 is installed on the side wall of the sealed chamber 4 away from the remediation chamber 1. The two ends of the drive shaft 2 are respectively inserted into the rotating seats 9 on both sides and rotate around their center. A drive motor 91 is fixedly connected to the outer wall of the rotating seat 9 near the discharge chamber 61. The output end of the drive motor 91 is fixedly connected to the end of the drive shaft 2. The drive motor 91 is a permanent magnet synchronous motor with a power of 110-500kW and a speed of 200-600rpm. Here, the drive motor 91 is preferably 300kW and 400rpm to ensure that the linear velocity of the steel ball 31 in the remediation chamber 1 reaches the design requirements, so that the steel ball 31 collides violently with the soil particles and generates an extremely high pressure of ≥100MPa and a high temperature of ≥500℃ at the moment of collision, forming a strong impact energy and heat energy, providing sufficient energy for the breakage of chemical bonds of organic pollutants in the soil. The inner end of the repair chamber 1 is fixedly connected to the guide chamber 5. The drive shaft 2 passes through the center of the repair chamber 1 and is fixedly connected to the inclined guide plate 23. The inclined guide plate 23 can better guide the soil into the repair chamber of the repair chamber 1. One end of the protective shell 21 is attached to the lower end of the inclined guide plate 23, and the other end of the protective shell 21 is attached to the side wall of the mounting seat of the inner wall of the repair chamber 1. The output end of the guide chamber 5 is connected to the inner cavity of the repair chamber 1. The feed pipe 51 is fixedly connected to the side wall of the repair chamber 1. The feed pipe 51 is located directly above the guide chamber 5 and is connected to its inner cavity.

[0026] With the above-described structure, pretreated soil and steel balls 31 are fed into the remediation chamber 1 through the feed pipe 51 at a mass ratio of 1:3. Then, the feed pipe 51 is closed and the drive motor 91 is turned on, causing the drive shaft 2 and the protective shell 21 to rotate rapidly with the feeding teeth 22 inside the remediation chamber 1. This causes the soil and steel balls 31 to move rapidly within the chamber. At this time, the steel balls 31 collide violently with the soil particles, generating high pressure and high temperature instantaneously, forming strong impact energy and heat energy. In the high-temperature and high-pressure micro-reaction zone generated by the collision, the bond energy of organic molecules decreases and the intermolecular distance decreases, causing chemical bonds such as CC, CH, and C-Cl to break. The broken free radicals further undergo chain reactions, accelerating the decomposition of pollutants and ultimately realizing the conversion of organic pollutants into carbon dioxide, water, or carbonization products. This achieves purely mechanical treatment of soil pollutants, effectively avoiding secondary pollution problems caused by chemical treatment, simplifying the process, and reducing treatment costs. Furthermore, the continuous collisions refine the soil particles to <50μm, significantly increasing the specific surface area and promoting the desorption of pollutants from the soil particle surface. Simultaneously, the nanoscale metal oxides, such as iron(III) oxide, generated on the surface of steel ball 31 due to friction can catalyze the decomposition of organic pollutants, further enhancing degradation efficiency.

[0027] Reference Figure 3 , Figure 4 , Figure 6, Figure 8 and Figure 9 The discharge section includes a baffle plate 6, which is fixed to the inner wall of the repair chamber 1. The baffle plate 6 and the inner cavity end of the repair chamber 1 form a discharge chamber 61. The baffle plate 6 is sealed to the outer wall of the protective shell 21. A limit guide ring 62 is fixedly connected to the outer wall of the repair chamber 1. An adjustment groove 621 is provided on the side wall of the repair chamber 1. An adjustment plate 63 is attached to the side of the baffle plate 6 near the discharge chamber 61. Connecting ears 631 are fixedly connected to both sides of the adjustment plate 63. The connecting ears 631 pass through the adjustment groove 621 and are fixed in the slot of the limit guide ring 62 by bolts. Discharge grooves 64 are provided on both sides of the baffle plate 6. Screening grooves 65 are provided on both sides of plate 63; when the adjusting plate 63 rotates along the empty groove of the limiting guide ring 62, the screening groove 65 is connected to the discharge groove 64, and the inner diameter of the connected area is smaller than the outer diameter of the steel ball 31; an exhaust pipe 7 and a soil discharge pipe 71 are fixedly connected to the outer wall of the repair chamber 1, and both the exhaust pipe 7 and the soil discharge pipe 71 are connected to the inner cavity of the discharge chamber 61, with the exhaust pipe 7 located at the top of the discharge chamber 61 and the soil discharge pipe 71 located at the bottom of the discharge chamber 61; in addition, a three-stage cyclone separator is installed in series at the output end of the exhaust pipe 7, with the inner diameters of the cyclone separator pipes being 500mm, 300mm and 150mm respectively.

[0028] It should be noted that by adjusting the connecting cavity between the screening trough 65 and the discharge trough 64, it can be adapted to soil discharge with different particle size requirements, and the inner diameter of the connecting cavity is smaller than the outer diameter of the steel ball 31, which can achieve effective separation of soil and steel ball 31.

[0029] With the above-mentioned structure, the high temperature generated by the collision of steel balls 31 with soil particles will evaporate the water produced during the decomposition of organic matter. Combined with the high pressure generated in the remediation chamber 1, the water vapor will pass through the connecting cavity of the screening tank 65 and the discharge tank 64 into the discharge chamber 61, and will also bring the soil particles scattered in the remediation chamber 1 into the discharge chamber 61. At this time, the water vapor will pass through the exhaust pipe 7 and the three-stage cyclone separator and be discharged, while the soil particles will be trapped in the discharge chamber 61 and finally discharged into the discharge chamber 61 through the soil discharge pipe 71, thus realizing the discharge of the treated soil and effectively improving the soil remediation efficiency.

[0030] Reference Figure 3 , Figure 4 and Figure 6A scraper 211 is fixedly connected to the outer wall of the protective shell 21 inside the discharge hopper 61. The end of the scraper 211 is in contact with the inner wall of the discharge hopper 61. By using the scraper 211, the soil particles trapped in the discharge hopper 61 can be scraped to the input end of the soil discharge pipe 71 so that the treated soil can be discharged. At the same time, it ensures the cleanliness of the inner wall of the discharge hopper 61 and avoids the soil particles remaining from affecting the data of the next soil remediation, thus ensuring the accuracy of soil remediation.

[0031] Reference Figure 3 , Figure 5 The sealing element includes a positioning ring 41, which is fixedly connected to the outer wall of the end of the remediation chamber 1. A sealing ring 42 is fixedly connected to the side wall of the positioning ring 41, and multiple layers of sealing gaskets 43 are fixedly connected to the inner wall of the positioning ring 41. The sealing gaskets 43 are sleeved on the outer wall of the drive shaft 2, and the central axes of the remediation chamber 1, drive shaft 2, protective shell 21, sealing chamber 4, and positioning ring 41 are coincident. As such, the sealing effect inside the remediation chamber 1 is ensured, preventing the leakage of soil particles and the high pressure and high temperature generated inside the remediation chamber 1, thus ensuring the soil remediation effect.

[0032] Reference Figure 2 , Figure 3 and Figure 7 The water-cooling assembly includes two sets of cooling chambers 8, both sets of cooling chambers 8 are fitted on the outer wall of the repair chamber 1, and the ends of the two sets of cooling chambers 8 are fixedly connected by bolts. The top and bottom of the inner cavity of the cooling chamber 8 are respectively fixedly connected to water guide pipes 81, which are connected to the inner cavity of the cooling chamber 8. In addition, the two water guide pipes 81 in each set of cooling chambers 8 are respectively fixed and connected to a water injection pipe 811 and a drain pipe 82 that penetrate to the outside of the repair chamber 1.

[0033] With the above structure, during the soil treatment process, cooling water is injected into the two sets of cooling chambers 8 through the water injection pipe 811 and the water guide pipe 81 to cool down the remediation chamber 1. The water that has absorbed heat and heated up is discharged through the drain pipe 82. This effectively controls the temperature inside the remediation chamber 1 and prevents the soil from sintering due to excessive temperature, thereby improving the quality of soil remediation.

[0034] Reference Figures 1-9In this invention, during use, pretreated soil and steel balls 31 are added to the remediation chamber 1 at a mass ratio of 1:3. Then, the feed pipe 51 is closed, and the drive motor 91 is turned on, causing the drive shaft 2 and protective shell 21 to rotate rapidly within the remediation chamber 1, along with the feeding teeth 22. This causes the soil and steel balls 31 to move rapidly within the chamber. At this time, the steel balls 31 collide violently with the soil particles, generating high pressure and high temperature instantaneously, creating powerful impact energy and heat. Within the high-temperature, high-pressure micro-reaction zone generated by the collision, the bond energy of organic molecules decreases, and the intermolecular distance shrinks, causing the breakage of chemical bonds such as CC, CH, and C-Cl. The broken free radicals further undergo chain reactions, accelerating the decomposition of pollutants and ultimately achieving the conversion of organic pollutants into carbon dioxide, water, or carbonized products. This effectively treats soil pollutants, avoiding secondary pollution problems caused by chemical treatment, simplifying the process, and reducing treatment costs. Furthermore, the continuous collisions refine the soil particles to <50μm, significantly increasing the specific surface area and promoting the desorption of pollutants from the soil particle surface. Meanwhile, the nanoscale metal oxides, such as iron(III) oxide, generated on the surface of steel ball 31 due to friction can catalyze the decomposition of organic pollutants, further improving the degradation efficiency.

[0035] The high temperature generated by the collision of steel ball 31 with soil particles evaporates the moisture produced during the decomposition of organic matter. Combined with the high pressure generated in the remediation chamber 1, the water vapor passes through the connecting cavity of the screening tank 65 and the discharge tank 64 into the discharge chamber 61, and carries the soil particles scattered in the remediation chamber 1 into the discharge chamber 61. At this time, the water vapor is discharged through the exhaust pipe 7 and the three-stage cyclone separator, while the soil particles are trapped in the discharge chamber 61 and finally discharged into the discharge chamber 61 through the soil discharge pipe 71. This achieves the discharge of the treated soil. Then, the treated soil is sampled and tested. If the pollutant residue exceeds the standard (e.g., PAHs > 0.1 mg / kg), it is returned to the remediation equipment cavity for secondary treatment. If the soil treatment meets the standard, it is sprayed for stabilization treatment and finally transported to the backfill area for backfilling.

[0036] Components not described in detail in this article are existing technologies.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A soil remediation device based on pure mechanical energy, characterized in that, Based on the following soil remediation process: Step 1: Dry, sieve, and crush the soil to be repaired; Step 2: Use high temperature and high pressure to break the chemical bonds of organic pollutants in the soil; Step 3: Regulate the temperature inside the soil remediation equipment cavity using water cooling; The soil remediation equipment includes a remediation chamber (1), a drive shaft (2) is rotatably connected between the inner walls of the two ends of the remediation chamber (1) via a mounting base, a protective shell (21) is fixedly fitted on the outer wall of the drive shaft (2), multiple sets of feeding teeth (22) are fixed at equal intervals on the outer wall of the protective shell (21), a spiral guide groove (3) is provided on the inner wall of the remediation chamber (1), and the remediation chamber (1) is filled with steel balls (31), and also includes: The sealing chamber (4) is provided in two sets and is fixed on the outer walls of both ends of the repair chamber (1). The two ends of the drive shaft (2) pass through the two sets of sealing chambers (4) respectively, and the sealing chamber (4) is provided with a sealing element that fits against the outer wall of the drive shaft (2). The discharge section is located inside the repair chamber (1) and is used to discharge the repaired soil particles. A water-cooling assembly is installed on the outer wall of the repair chamber (1). The water-cooling assembly is used to control the repair temperature inside the repair chamber (1) to prevent soil sintering. The discharge section includes a baffle plate (6), which is fixed to the inner wall of the repair chamber (1). The baffle plate (6) and the inner cavity end of the repair chamber (1) form a discharge chamber (61). The baffle plate (6) is sealed to the outer wall of the protective shell (21). A limit guide ring (62) is fixedly connected to the outer wall of the repair chamber (1). An adjustment groove (621) is provided on the side wall of the repair chamber (1). An adjustment plate (63) is attached to the side of the baffle plate (6) near the discharge chamber (61). Connecting ears are fixedly connected to both sides of the adjustment plate (63). 631), the connecting ear (631) passes through the adjusting slide (621) and is fixed in the empty groove of the limiting guide ring (62) by bolts. The baffle plate (6) has discharge grooves (64) on both sides. The adjusting plate (63) has screening grooves (65) on both sides. When the adjusting plate (63) rotates along the empty groove of the limiting guide ring (62), the screening groove (65) and the discharge groove (64) are connected. The inner diameter of the connecting area is smaller than the outer diameter of the steel ball (31). By adjusting the connecting cavity of the screening groove (65) and the discharge groove (64), it is suitable for soil discharge with different particle size requirements. An exhaust pipe (7) and a soil discharge pipe (71) are fixedly connected to the outer wall of the repair chamber (1). The exhaust pipe (7) and the soil discharge pipe (71) are both connected to the inner cavity of the discharge chamber (61). The exhaust pipe (7) is located at the top of the discharge chamber (61), while the soil discharge pipe (71) is located at the bottom of the discharge chamber (61). A scraper (211) is fixedly connected to the outer wall of the protective shell (21) inside the discharge chamber (61). The end of the scraper (211) is in contact with the inner wall of the discharge chamber (61). A three-stage cyclone separator is connected in series at the output end of the exhaust pipe (7). A rotating seat (9) is installed on the side wall of the sealed chamber (4) away from the repair chamber (1). The two ends of the drive shaft (2) are respectively inserted into the rotating seats (9) on both sides and rotate around its center. A drive motor (91) is fixedly connected to the outer wall of the rotating seat (9) on the side close to the discharge chamber (61). The output end of the drive motor (91) is fixedly connected to the end of the drive shaft (2). The steel ball (31) collides violently with the soil in the remediation chamber, generating high pressure and high temperature in an instant, forming powerful impact energy and heat energy, which causes the chemical bonds of organic pollutants in the soil to break, thus achieving pure mechanical treatment of soil pollutants. The high temperature generated by the collision of steel balls (31) with soil particles evaporates the water produced during the decomposition of organic matter. Combined with the high pressure generated in the repair chamber (1), water vapor is used to carry the soil particles scattered in the repair chamber (1) into the discharge chamber (61), and finally gas-solid separation is achieved in the discharge chamber (61).

2. The soil remediation equipment based on pure mechanical energy according to claim 1, characterized in that, The inner end of the repair chamber (1) is fixedly connected to a guide chamber (5). The drive shaft (2) passes through the center of the repair chamber (1) and is fixedly connected to a ramp guide plate (23). One end of the protective shell (21) is attached to the lower end of the ramp guide plate (23). The other end of the protective shell (21) is attached to the mounting seat side wall of the inner wall of the repair chamber (1). The output end of the guide chamber (5) is connected to the inner cavity of the repair chamber (1). A feed pipe (51) is fixedly connected to the side wall of the repair chamber (1). The feed pipe (51) is located directly above the guide chamber (5) and is connected to its inner cavity.

3. The soil remediation equipment based on pure mechanical energy according to claim 1, characterized in that, The sealing element includes a positioning ring (41), which is fixedly connected to the outer wall of the end of the repair chamber (1). A sealing ring (42) is fixedly connected to the side wall of the positioning ring (41). A multi-layer sealing gasket (43) is fixedly connected to the inner wall of the positioning ring (41). The sealing gasket (43) is sleeved on the outer wall of the drive shaft (2). The central axes of the repair chamber (1), drive shaft (2), protective shell (21), sealing chamber (4) and positioning ring (41) coincide.

4. The soil remediation equipment based on pure mechanical energy according to claim 1, characterized in that, The water-cooling assembly includes two sets of cooling chambers (8). Both sets of cooling chambers (8) are fitted onto the outer wall of the repair chamber (1). The ends of the two sets of cooling chambers (8) are fixedly connected by bolts. Water pipes (81) are fixedly connected to the top and bottom of the inner cavity of the cooling chamber (8). The water pipes (81) are connected to the inner cavity of the cooling chamber (8). A water injection pipe (811) and a drain pipe (82) that penetrate to the outside of the repair chamber (1) are fixed and connected to the two water pipes (81) in each set of cooling chambers (8).

5. The soil remediation equipment based on pure mechanical energy according to claim 1, characterized in that, Step one of the soil remediation process is as follows: The soil was subjected to a multi-stage drying process, including water control, natural drying, and low-temperature drying, to ensure that the soil moisture content was less than 10%. The soil to be repaired is passed through a vibrating screen with 5mm mesh to remove stones and tree roots; A twin-shaft shredder is used to break large soil pieces down to ≤20mm in size; Lightweight impurities are separated by an air separator, reducing the soil impurity content to less than 1%.

6. The soil remediation equipment based on pure mechanical energy according to claim 1, characterized in that, Step two of the soil remediation process is as follows: The pretreated soil and steel balls (31) were put into the cavity of the repair equipment at a mass ratio of 1:2-1:5; Start the repair equipment and process for 30-90 minutes to allow the soil to collide violently with the steel ball (31); The high temperature and pressure generated during the collision cause the chemical bonds of organic pollutants in the soil to break.

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