Integrated apparatus for ultrasound-enhanced soil remediation

Abstract

An integrated apparatus for ultrasound-enhanced soil remediation, comprising a reaction tank (1) and a controller (2). A cover (3) is fixedly connected to the top surface of the reaction tank, a stirring assembly (4) is provided at the center of the cover, three mounting openings (6) are uniformly and vertically formed on the cover, an ultrasonic transducer (7) is fixedly connected to the top surface of the cover at the position corresponding to each mounting opening, an ultrasonic probe (8) is fixedly connected to the bottom of the ultrasonic transducer, the ultrasonic probe passes through the mounting opening and is located inside the reaction tank, two heating rods (5) are vertically fitted through the cover, and lower portions of the heating rods are located inside the reaction tank. The ultrasonic transducer generates ultrasonic vibration by means of the ultrasonic probes. The stirring assembly provides mechanical stirring and mixing. Ultrasonic vibration and mechanical stirring are integrated within the reaction tank. Synergistic action of ultrasound and stirring can improve macroscopic physical mixing uniformity between a remediation agent and soil and can also enhance microscopic interfacial contact between the remediation agent and contaminants, thereby improving the mixing effect, improving the utilization efficiency of the remediation agent and the remediation efficiency, and reducing costs.

Description

An integrated device for ultrasonic-enhanced soil remediation

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411896137.X, filed on December 20, 2024, entitled "An Integrated Device for Ultrasonic Enhanced Soil Remediation", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of soil remediation equipment technology, specifically an integrated device for ultrasonic-enhanced soil remediation. Background Technology

[0004] In recent years, with the rapid pace of urbanization and industrialization in my country, soil pollution has become increasingly serious, and frequent pollution incidents have attracted widespread attention. Soil pollution not only affects agricultural production and damages the ecological environment, but may also pose a threat to human health through the food chain. Common soil pollutants include heavy metals and organic pollutants, which are difficult to degrade in soil and can lead to serious ecological and health problems if accumulated over a long period. Traditional soil remediation technologies mainly include physical remediation, chemical remediation, and bioremediation. Physical remediation methods, such as thermal desorption, can directly remove pollutants, but they are energy-intensive, economically inefficient, and may damage soil structure and ecological balance. Chemical remediation methods, such as chemical oxidation and chemical reduction, can decompose organic pollutants, but may produce secondary pollution, the remediation effect is prone to rebound, and their effectiveness against inorganic pollutants such as heavy metals is limited. Bioremediation utilizes microorganisms to degrade pollutants and is an environmentally friendly method. Physical remediation often employs a mixing process, blending remediation agents with the soil. For example, Chinese utility model patent CN213556488U discloses a soil remediation mixing device, which includes a mixing tank. A central shaft is rotatably mounted inside the mixing tank. A forward drive motor for driving the central shaft is mounted on the upper surface of the mixing tank. At least three bushings are rotatably mounted on the central shaft. A mesh hopper is fixed to the outer circumference of each bushing. Reverse stirring blades are mounted on both sides of the lower surface of the mesh hopper. Reverse drive devices for driving the mesh hopper's rotation are mounted on both sides of the mixing tank. Forward stirring blades are mounted on both sides of the central shaft inside the mesh hopper. This utility model incorporates forward stirring blades and a reverse-rotating mesh hopper. However, this type of soil remediation device has the following drawbacks:

[0005] This type of mixing device only uses mechanical stirring for mixing, resulting in poor mixing effect between the agent and the soil, low contact efficiency between the agent and pollutants, poor mixing effect, and low agent utilization rate.

[0006] Therefore, we propose an integrated device for ultrasonic-enhanced soil remediation to address the aforementioned problems. Summary of the Invention

[0007] The purpose of this application is to provide an integrated device for ultrasonic-enhanced soil remediation to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this application provides the following technical solution: an integrated device for ultrasonic-enhanced soil remediation, comprising a reaction tank and a controller. A cover is fixed to the top surface of the reaction tank, and a stirring assembly is provided at the center of the cover. Three mounting ports are evenly and vertically opened on the cover. An ultrasonic transducer is fixed to the top surface of the cover corresponding to each mounting port. An ultrasonic probe is fixed to the bottom of the ultrasonic transducer. The ultrasonic probe passes through the mounting port and is located inside the reaction tank. Two heating rods are vertically sleeved on the cover, and the lower part of the heating rods is located inside the reaction tank.

[0009] Optionally, a protective cover is provided on the outside of the reaction vessel, and thermal insulation material is fixed between the inner wall of the protective cover and the outer wall of the reaction vessel.

[0010] Optionally, multiple temperature sensors are uniformly fixed to the inner wall of the reaction vessel, and a reagent injection port is fixed to the cover, which is connected to the inside of the reaction vessel.

[0011] Optionally, a discharge port is provided on one side of the bottom of the reaction tank, and a feed port is provided on the other side of the bottom of the reaction tank. The discharge port is fixedly connected to and connected to one end of a discharge pipe, and the other end of the discharge pipe is located outside the protective cover. A first valve is fixedly connected to the discharge pipe, and the discharge pipe passes through the protective cover and insulation material. The feed port is fixedly connected to and connected to one end of a feed pipe, and the other end of the feed pipe is located outside the protective cover and fixedly connected to a pump. A second valve is fixedly connected to the feed pipe, and the feed pipe passes through the protective cover and insulation material.

[0012] Optionally, the stirring assembly includes a fixture fixed to the center of the top surface of the cover, the fixture being rotatably connected to the top of a stirring rod, the stirring rod being located at the center of the inside of the reaction vessel, multiple stirring blades being uniformly fixed to the periphery of the stirring rod, a stirring motor being fixed to the top surface of the fixture, the shaft end of the stirring motor being fixed to the top of the stirring rod, and the controller being electrically connected to the stirring motor, an ultrasonic transducer, and a heating rod.

[0013] Optionally, the bottom of the reaction vessel is fixedly connected to and connected to a cleaning port, the cleaning port passes through the protective cover and insulation material, and a third valve is fixedly connected to the cleaning port.

[0014] Compared with the prior art, the beneficial effects of this application are:

[0015] The ultrasonic transducer of this application generates ultrasonic vibration through an ultrasonic probe, and the stirring assembly provides mechanical stirring and mixing. The ultrasonic vibration and mechanical stirring are integrated into the reaction vessel. The synergistic effect of ultrasound and stirring can improve the macroscopic physical mixing of the agent and the soil, as well as the microscopic interface contact between the agent and the pollutants, thereby improving the mixing effect. At the same time, it can improve the utilization rate of the agent and the remediation efficiency, and reduce the cost. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the main structure in the first, second and third embodiments of this application;

[0017] Figure 2 is a schematic diagram of the main body cross-section structure in the first, second and third embodiments of this application;

[0018] Figure 3 is an enlarged structural diagram of the structure at point A in Figure 2 of this application.

[0019] In the diagram: 1. Reaction vessel; 2. Controller; 3. Cover; 4. Stirring assembly; 5. Heating rod; 6. Mounting port; 7. Ultrasonic transducer; 8. Ultrasonic probe; 9. Temperature sensor; 10. Reagent injection port; 11. Discharge port; 12. Discharge pipe; 13. First valve; 14. Feed inlet; 15. Feed pipe; 16. Second valve; 17. Pump; 18. Cleaning port; 19. Third valve; 20. Protective cover; 21. Insulation material; 41. Fixing device; 42. Stirring rod; 43. Stirring blades; 44. Stirring motor. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Example 1:

[0022] Please refer to Figures 1-3. This application provides a technical solution: an integrated device for ultrasonic-enhanced soil remediation, including a reaction tank 1 and a controller 2. A cover 3 is fixed to the top surface of the reaction tank 1. A stirring assembly 4 is located at the center of the cover 3. Three mounting ports 6 are evenly and vertically opened on the cover 3. An ultrasonic transducer 7 is fixed to each mounting port 6 on the top surface of the cover 3. An ultrasonic probe 8 is fixed to the bottom of the ultrasonic transducer 7. The ultrasonic probe 8 passes through the mounting port 6 and is located inside the reaction tank 1. Two heating rods 5 are vertically sleeved on the cover 3. The lower part of the heating rods 5 is located inside the reaction tank 1. The ultrasonic transducer 7 generates ultrasonic vibration through the ultrasonic probe 8. The stirring component 4 provides mechanical stirring and mixing, integrating ultrasonic vibration and mechanical stirring within the reaction tank 1. The equipment has a small footprint and is easy to operate. At the same time, the synergistic effect of ultrasound and stirring can improve both the macroscopic physical mixing of the agent and the soil and the microscopic interface contact between the agent and the pollutants, thereby improving the agent utilization rate and remediation efficiency, and reducing costs. The ultrasonic probe 8 is installed through the installation port 6. Different ultrasonic probes 8 can be set according to different pollutant categories, or dual-frequency or multi-frequency ultrasonic waves can be used to counteract standing waves, reduce energy weakening areas, promote uniform energy distribution, improve remediation efficiency, reduce energy consumption, and save costs.

[0023] Example 2:

[0024] Please refer to Figures 1-3, which are the second embodiment of this application. This embodiment is based on the previous embodiment. A protective cover 20 is provided on the outside of the reaction vessel 1. Thermal insulation material 21 is fixed between the inner wall of the protective cover 20 and the outer wall of the reaction vessel 1 to reduce energy loss such as heat caused by external environmental factors and indirectly reduce energy consumption.

[0025] Multiple temperature sensors 9 are uniformly fixed to the inner wall of the reaction tank 1, and a reagent injection port 10 is fixed to the cover 3. The reagent injection port 10 is connected to the inside of the reaction tank 1. The temperature sensors 9 can detect the internal temperature of the reaction tank 1, and the controller 2 can adjust the heating rod 5 in a timely manner. The optimal temperature is preset according to the nature of the pollutants and the cavitation effect to achieve dynamic adjustment, which can enhance the remediation efficiency and promote the removal of recalcitrant pollutants.

[0026] A discharge port 11 is opened on one side of the bottom of the reaction tank 1, and a feed port 14 is opened on the other side of the bottom of the reaction tank 1. The discharge port 11 is fixedly connected to one end of the discharge pipe 12, and the other end of the discharge pipe 12 is located outside the protective cover 20. A first valve 13 is fixedly connected to the discharge pipe 12. The discharge pipe 12 passes through the protective cover 20 and the insulation material 21. The feed port 14 is fixedly connected to one end of the feed pipe 15, and the other end of the feed pipe 15 is located outside the protective cover 20 and fixedly connected to the pump 17. A second valve 16 is fixedly connected to the feed pipe 15. The feed pipe 15 passes through the protective cover 20 and the insulation material 21. The material is fed by pump 17. By accurately calculating the processing time (i.e., the residence time of the material), the continuous operation of the device can be realized, saving manpower input and realizing the automation and efficiency of the soil remediation process.

[0027] The stirring assembly 4 includes a fixture 41 fixed to the center of the top surface of the cover 3. The fixture 41 is rotatably connected to the top of the stirring rod 42. The stirring rod 42 is located at the center of the inside of the reaction tank 1. Multiple stirring blades 43 are evenly fixed to the periphery of the stirring rod 42. The top surface of the fixture 41 is fixed to the stirring motor 44. The shaft end of the stirring motor 44 is fixed to the top of the stirring rod 42. The controller 2 is electrically connected to the stirring motor 44, the ultrasonic transducer 7, and the heating rod 5.

[0028] The bottom of the reaction vessel 1 is fixedly connected to and connected to the cleaning port 18. The cleaning port 18 passes through the protective cover 20 and the insulation material 21. A third valve 19 is fixedly connected to the cleaning port 18. The cleaning port 18 can realize the self-cleaning of the reaction vessel 1 and extend the service life of the reaction vessel 1.

[0029] Example 3:

[0030] Please refer to Figures 1-3, which show the third embodiment of this application. This embodiment is based on the above two embodiments. When this application is used, the soil-water mixture can be pumped into the tank through the inlet 14. After processing, it is discharged from the outlet 11. The residence time of the material is precisely controlled. The agent is added to the reaction tank 1 through the agent injection port 10. It is mixed by ultrasonic vibration and mechanical stirring by the stirring component 4. During the mixing process, the temperature sensor 9 can detect the internal temperature of the reaction tank 1, and the controller 2 can adjust the heating rod 5 in a timely manner. The optimal temperature is preset according to the properties of the pollutants and the cavitation effect to complete the soil remediation reaction. The ultrasonic transducer 7 of this application generates ultrasonic vibration through the ultrasonic probe 8, and the stirring component 4 provides mechanical stirring and mixing. The ultrasonic vibration and mechanical stirring are integrated in the reaction tank 1. The ultrasound and stirring work together to improve the macroscopic physical mixing of the agent and the soil, and also to improve the microscopic interface contact between the agent and the pollutants, thereby improving the mixing effect, increasing the agent utilization rate and remediation efficiency, and reducing costs.

[0031] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated device for ultrasonic-enhanced soil remediation, comprising a reaction vessel (1) and a controller (2), Its features are: The top surface of the reaction vessel (1) is fixed with a cover (3). A stirring assembly (4) is provided at the center of the cover (3). Three mounting ports (6) are evenly and vertically opened on the cover (3). An ultrasonic transducer (7) is fixed on the top surface of the cover (3) corresponding to each mounting port (6). An ultrasonic probe (8) is fixed at the bottom of the ultrasonic transducer (7). The ultrasonic probe (8) passes through the mounting port (6) and is located inside the reaction vessel (1). Two heating rods (5) are vertically sleeved on the cover (3). The lower part of the heating rods (5) is located inside the reaction vessel (1).

2. The integrated device for ultrasonic-enhanced soil remediation according to claim 1, characterized in that: The reaction vessel (1) is provided with a protective cover (20), and the inner wall of the protective cover (20) is fixedly connected to the outer wall of the reaction vessel (1) with thermal insulation material (21).

3. The integrated device for ultrasonic-enhanced soil remediation according to claim 1, characterized in that: Multiple temperature sensors (9) are uniformly fixed to the inner wall of the reaction vessel (1), and a drug injection port (10) is fixed to the cover (3), which is connected to the inside of the reaction vessel (1).

4. The integrated device for ultrasonic-enhanced soil remediation according to claim 2, characterized in that: The reaction vessel (1) has a discharge port (11) on one side of its bottom and a feed port (14) on the other side of its bottom. The discharge port (11) is fixed to and connected to one end of the discharge pipe (12). The other end of the discharge pipe (12) is located outside the protective cover (20). A first valve (13) is fixed to the discharge pipe (12). The discharge pipe (12) passes through the protective cover (20) and the insulation material (21). The feed port (14) is fixed to and connected to one end of the feed pipe (15). The other end of the feed pipe (15) is located outside the protective cover (20) and fixed to a pump (17). A second valve (16) is fixed to the feed pipe (15). The feed pipe (15) passes through the protective cover (20) and the insulation material (21).

5. The integrated device for ultrasonic-enhanced soil remediation according to claim 1, characterized in that: The stirring assembly (4) includes a fixture (41) fixed to the center of the top surface of the cover (3). The fixture (41) is rotatably connected to the top of the stirring rod (42). The stirring rod (42) is located at the center of the inside of the reaction tank (1). Multiple stirring blades (43) are evenly fixed to the periphery of the stirring rod (42). The top surface of the fixture (41) is fixed to the stirring motor (44). The shaft end of the stirring motor (44) is fixed to the top of the stirring rod (42). The controller (2) is electrically connected to the stirring motor (44), the ultrasonic transducer (7), and the heating rod (5).

6. The integrated device for ultrasonic-enhanced soil remediation according to claim 2, characterized in that: The bottom end of the reaction vessel (1) is fixedly connected to and connected to a cleaning port (18). The cleaning port (18) passes through the protective cover (20) and the insulation material (21). A third valve (19) is fixedly connected to the cleaning port (18).

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