Integrated device for rapid extraction and purification of soil semi-volatile organic compounds

Abstract

The utility model discloses a fast extraction purification integrated device of soil semi-volatility organic matter, including work table, the top of work table is provided with the extraction jar, the top of extraction jar is provided with the jar cover, the top of jar cover is provided with the feeding cap, the lower extreme of jar cover is provided with the discharge valve subassembly, the below of work table is provided with the collecting hopper, the inside of collecting hopper is provided with filter paper, the end face of filter paper is arc and is arranged, the top of work table is provided with the exhaust fan and the purification box, the exhaust fan is communicated and is arranged with purification box, the top of exhaust fan is provided with first connecting pipe, the inside of purification box is provided with activated carbon catalytic filler, the top of purification box is provided with the exhaust pipe, be provided with first solenoid valve on the exhaust pipe, the device will adsorption purification structure directly embed extraction device, synchronously adsorb interfering substance in the extraction process, save the independent purification step, improve semi-volatility organic matter processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of extraction and purification technology, specifically an integrated device for the rapid extraction and purification of semi-volatile organic compounds in soil. Background Technology

[0002] Semi-volatile organic compounds (SVCs) are a large class of organic compounds that are less volatile than volatile organic compounds (VOCs). They are more likely to migrate and transform in media such as water, soil, air, and organisms, and can persist in water and soil for a long time. Through bioaccumulation, they can harm human health. Their environmental fate is usually soil and sediment. The common characteristics of these organic compounds are that they are fat-soluble and easily soluble in organic solvents, but some are also slightly soluble in water due to their high polarity. Generally, organic compounds such as organochlorine pesticides, organophosphorus pesticides, other herbicides, polycyclic aromatic hydrocarbons (PAHs), phthalates, polychlorinated biphenyls (PCBs), anilines, phenols, and nitrobenzenes can all be classified into this category. Concentrating and extracting SVCs from soil and judging the soil quality based on the amount extracted can help with subsequent soil maintenance work.

[0003] Chinese Patent Publication No. CN219675628U, authorized on September 12, 2023, discloses a device for concentrating and extracting semi-volatile organic compounds (SMOs) in soil, relating to the technical field of soil testing equipment. The device includes a base plate, on which a mixing tank is mounted with a cover, motor, mixing shaft, mixing blades, and an inner chamber. A heating device is installed on the outer wall of the inner chamber. A discharge pipe is installed at the bottom of the mixing tank. A discharge baffle, pull plate, and return spring are installed on the left and right sides of the bottom wall of the mixing tank via mounting plates. A collection cylinder is also installed on the top right side of the base plate. A condenser pipe is also installed on the mixing tank and the inner chamber, with the discharge end of the condenser pipe located directly above the collection cylinder. This invention, through the action of the mixing shaft, mixing blades, and heating device, allows the soil to fully contact with heat, ensuring the volatilization efficiency of the SMOs. The condenser pipe condenses and liquefies the volatilized high-temperature SMOs, facilitating subsequent collection and extraction.

[0004] Existing methods for treating semi-volatile organic compounds (SVCs) require a solvent extraction step. Although pressurized solvent extraction or microwave-assisted extraction exist, subsequent independent purification steps are still necessary. These methods are time-consuming, involve cumbersome manual operation, reduce the efficiency of SVC treatment, and fail to meet usage requirements. Utility Model Content

[0005] The purpose of this invention is to provide an integrated device for the rapid extraction and purification of semi-volatile organic compounds in soil, in order to solve the problems mentioned in the background art that the existing semi-volatile organic compound treatment requires a solvent extraction step. Although there is pressurized solvent extraction or microwave assistance, a subsequent independent purification step is required, which is time-consuming, cumbersome to operate manually, reduces the treatment efficiency of semi-volatile organic compounds, and cannot meet the needs of use.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an integrated device for the rapid extraction and purification of semi-volatile organic compounds in soil, comprising a workbench, an extraction tank fixedly connected to the workbench above the workbench, a tank cover above the extraction tank, a feeding cap threadedly connected to the tank cover, a discharge valve assembly integrally connected to the tank cover at the lower end of the tank cover, a collection hopper below the workbench and positioned below the discharge valve assembly, and filter paper arranged inside the collection hopper. The filter paper is integrated with the collection hopper, and the end face of the filter paper is arc-shaped. An exhaust fan and a purification box are installed above the workbench, and the exhaust fan and purification box are connected to the workbench by screws. The exhaust fan is connected to the purification box. A first connecting pipe is installed above the exhaust fan, and the two ends of the first connecting pipe are connected to the tank cover and the exhaust fan, respectively. Activated carbon catalytic packing is installed inside the purification box, and the activated carbon catalytic packing is fixedly connected to the purification box. An exhaust pipe is installed above the purification box, and one end of the exhaust pipe is integrated with the purification box. A first solenoid valve is installed on the exhaust pipe.

[0007] Preferably, an organic matter detection probe is provided on one side of the purification box, and the organic matter detection probe is integrated with the purification box. The organic matter detection probe is positioned above the activated carbon catalytic packing.

[0008] Preferably, a filter screen is provided at the lower end of the can lid, and the filter screen is fixedly connected to the can lid. The filter screen is located below the first connecting pipe. A second connecting pipe is provided between the first connecting pipe and the exhaust pipe, and both ends of the second connecting pipe are connected to the first connecting pipe and the exhaust pipe as a whole. A second solenoid valve is provided on the second connecting pipe.

[0009] Preferably, a servo motor is provided above the extraction tank, and the servo motor is connected to the extraction tank by screws. A stirring paddle is provided inside the extraction tank, and the stirring paddle is connected to the output end of the servo motor. The stirring paddle is rotatably connected to the extraction tank. A scraper is provided outside the stirring paddle, and the scraper is fixedly connected to the stirring paddle. The scraper is in contact with the inner wall of the extraction tank.

[0010] Preferably, a temperature sensor is provided on one side of the extraction tank, and the temperature sensor is integrated with the extraction tank. The extraction tank includes an inner liner, an outer shell, and electric heating strips. The inner liner is located inside the outer shell and is fixedly connected to the outer shell. The electric heating strips are located outside the inner liner. There are six electric heating strips, and the inner liner is connected to the electric heating strips by screws. The six electric heating strips are equidistantly arranged outside the inner liner.

[0011] Preferably, a first connecting frame is provided below the workbench, and two first connecting frames are provided, and the first connecting frames are connected to the workbench by screws. A second connecting frame is provided on both sides of the collection hopper, and two second connecting frames are provided, and the second connecting frames are connected to the collection hopper by screws. The second connecting frames are slidably connected to the first connecting frames.

[0012] Preferably, the inside of the collecting hopper is provided with a grid, and the grid is fixedly connected to the collecting hopper, and the grid is positioned above the filter paper.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model device comprises an exhaust fan, a purification chamber, a first connecting pipe, an exhaust pipe, a first solenoid valve, a second connecting pipe, a second solenoid valve, an organic matter detection probe, and activated carbon catalytic packing. The exhaust fan generates suction, which draws volatile organic compounds from the extraction tank and sends them into the purification chamber through the first connecting pipe. The activated carbon catalytic packing in the purification chamber purifies the extracted volatile organic compounds. The first solenoid valve is opened to discharge the purified air through the exhaust pipe. The organic matter detection probe detects the treated air to determine whether it meets emission standards. If purification is incomplete, the second solenoid valve is opened to allow air to flow back into the first connecting pipe through the second connecting pipe for further purification, thus improving the purification effect. During the extraction process, interfering substances are adsorbed simultaneously, eliminating the need for a separate purification step and improving the treatment efficiency of semi-volatile organic compounds.

[0015] This utility model device incorporates a servo motor, a stirring paddle, a scraper, an electric heating strip, and a temperature sensor. The servo motor drives the stirring paddle to rotate, which in turn stirs the mixed soil, allowing the soil and extractant to react quickly. The scraper, along with the rotating stirring paddle, scrapes off the soil adhering to the inner tank. The electric heating strip is activated to heat the inner tank, increasing the extraction temperature. The temperature sensor measures the extraction temperature, allowing for easy control of the electric heating strip to adjust the extraction temperature. A suitable temperature is beneficial for extraction. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the present invention;

[0018] Figure 3 For the present utility model Figure 2 A magnified view of a portion of area A;

[0019] Figure 4 This is a perspective view of the collection bucket of this utility model;

[0020] Figure 5 This is a structural diagram of the extraction tank of this utility model.

[0021] In the diagram: 1. Workbench; 2. Support leg; 3. Extraction tank; 4. Tank lid; 5. Servo motor; 6. Feeding cap; 7. Collection hopper; 8. Exhaust fan; 9. Purification box; 10. First connecting pipe; 11. Exhaust pipe; 12. First solenoid valve; 13. Second connecting pipe; 14. Second solenoid valve; 15. Organic matter detection probe; 16. Activated carbon catalytic packing; 17. Filter screen; 18. Stirring paddle; 19. Scraper; 20. Discharge valve assembly; 21. Grating; 22. Filter paper; 23. First connecting frame; 24. Second connecting frame; 25. Inner liner; 26. Outer shell; 27. Electric heating strip; 28. Temperature sensor. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-5 This utility model provides an embodiment of a rapid extraction and purification integrated device for semi-volatile organic compounds in soil, comprising a workbench 1, an extraction tank 3 fixedly connected to the workbench 1 above the workbench 1, a tank cover 4 above the extraction tank 3, a feeding cap 6 threadedly connected to the tank cover 4, a discharge valve assembly 20 integrally connected to the tank cover 4 at the lower end of the tank cover 4, a collection hopper 7 below the workbench 1, the collection hopper 7 being positioned below the discharge valve assembly 20, and a filter paper 22 disposed inside the collection hopper 7. 7 are connected as one unit. The end face of the filter paper 22 is arc-shaped. An exhaust fan 8 and a purification box 9 are set above the workbench 1. The exhaust fan 8 and the purification box 9 are connected to the workbench 1 by screws. The exhaust fan 8 and the purification box 9 are connected. A first connecting pipe 10 is set above the exhaust fan 8. The two ends of the first connecting pipe 10 are connected to the can cover 4 and the exhaust fan 8, respectively. Activated carbon catalytic packing 16 is set inside the purification box 9. Activated carbon catalytic packing 16 is fixedly connected to the purification box 9. An exhaust pipe 11 is set above the purification box 9. One end of the exhaust pipe 11 is connected to the purification box 9 as one unit. A first solenoid valve 12 is set on the exhaust pipe 11.

[0024] In use: Open the feeding cap 6 and add soil and extractant to the extraction tank 3 to mix and react. After extraction, open the discharge valve assembly 20 to discharge the mixture into the collection hopper 7. Filter the extracted mixture with the filter paper 22 in the collection hopper 7 to obtain the extract. During the extraction process, turn on the exhaust fan 8 to generate suction. Under the action of suction, the volatile organic compounds in the extraction tank 3 are extracted and sent into the purification box 9 through the first connecting pipe 10. The extracted volatile organic compounds are purified by the activated carbon catalytic packing 16 in the purification box 9. Open the first solenoid valve 12 to discharge the purified air through the exhaust pipe 11.

[0025] Please see Figure 1 and Figure 2 An organic matter detection probe 15 is installed on one side of the purification chamber 9 and is integrated with the purification chamber 9. The organic matter detection probe 15 is positioned above the activated carbon catalytic packing 16. A filter screen 17 is installed at the lower end of the canister cover 4 and is fixedly connected to the canister cover 4. The filter screen 17 is positioned below the first connecting pipe 10. A second connecting pipe 13 is installed between the first connecting pipe 10 and the exhaust pipe 11, and both ends of the second connecting pipe 13 are integrated with the first connecting pipe 10 and the exhaust pipe 11, respectively. A second solenoid valve 14 is installed on the second connecting pipe 13. The organic matter detection probe 15 detects the treated air and determines whether the treated air meets the emission standards. If the purification is incomplete, the second solenoid valve 14 is opened to allow the air to flow into the first connecting pipe 10 through the second connecting pipe 13, thus purifying the incompletely purified air again and improving the purification effect.

[0026] Please see Figure 1 , Figure 2 and Figure 5A servo motor 5 is installed above the extraction tank 3 and is connected to the extraction tank 3 by screws. An agitator 18 is installed inside the extraction tank 3 and is connected to the output end of the servo motor 5. The agitator 18 is rotatably connected to the extraction tank 3. A scraper 19 is installed below the agitator 18 and is fixedly connected to the agitator 18. The scraper 19 is in contact with the inner wall of the extraction tank 3. A temperature sensor 28 is installed on one side of the extraction tank 3 and is integrated with the extraction tank 3. The extraction tank 3 includes an inner liner 25, an outer shell 26, and an electric heating strip 27. The inner liner 25 is located inside the outer shell 26, and the inner liner 25 is integrated with the outer shell 26. 26. Fixed connection. Electric heating strips 27 are set on the outside of the inner liner 25. There are six electric heating strips 27, and the inner liner 25 is connected to the electric heating strips 27 by screws. The six electric heating strips 27 are equidistantly set on the outside of the inner liner 25. The servo motor 5 is turned on to drive the stirring paddle 18 to rotate. The rotating stirring paddle 18 stirs the mixed soil, so that the soil and extractant are quickly mixed and reacted. The scraper 19 scrapes off the soil attached to the inner liner 25 as the stirring paddle 18 rotates. The electric heating strips 27 are turned on to heat the inner liner 25 and increase the extraction temperature. The temperature sensor 28 measures the extraction temperature, which makes it easy to control the electric heating strips 27 to adjust the extraction temperature. The appropriate temperature is conducive to extraction.

[0027] Please see Figure 2 , Figure 3 and Figure 4 A first connecting frame 23 is provided below the workbench 1. There are two first connecting frames 23, and they are connected to the workbench 1 by screws. A second connecting frame 24 is provided on both sides of the collection hopper 7. There are two second connecting frames 24, and they are connected to the collection hopper 7 by screws. The second connecting frame 24 is slidably connected to the first connecting frame 23. A grid 21 is provided inside the collection hopper 7, and the grid 21 is fixedly connected to the collection hopper 7. The grid 21 is located above the filter paper 22. The second connecting frame 24 is slidably connected to the first connecting frame 23. The collection hopper 7 is used to collect the extract. The grid 21 supports the falling extract mixture to prevent the extract mixture from falling directly onto the filter paper 22 and causing damage to the filter paper 22.

[0028] Working principle: The soil and extractant are added to the extraction tank 3 by opening the feeding cap 6 and mixing. The servo motor 5 is turned on to rotate the stirring paddle 18, which agitates the mixed soil. The electric heating strip 27 is turned on to heat the inner tank 25, increasing the extraction temperature and allowing the soil and extractant to mix and react rapidly. After extraction, the discharge valve assembly 20 is opened to discharge the mixture into the collection hopper 7. The mixture is filtered by the filter paper 22 in the collection hopper 7 to obtain the extract. During the extraction process, the exhaust fan 8 is turned on to generate suction, which lifts the soil out of the tank. Volatile organic compounds are extracted from tank 3 and sent into purification chamber 9 through the first connecting pipe 10. The extracted volatile organic compounds are purified by the activated carbon catalytic packing 16 in purification chamber 9. The first solenoid valve 12 is opened to discharge the purified air through the exhaust pipe 11. The organic matter detection probe 15 detects the treated air to determine whether the treated air meets the emission standards. If the purification is incomplete, the second solenoid valve 14 is opened to allow the air to flow into the first connecting pipe 10 through the second connecting pipe 13 for further purification of the incompletely purified air, thereby improving the purification effect.

[0029] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated device for rapid extraction and purification of semi-volatile organic compounds in soil, comprising a workbench (1), characterized in that: An extraction tank (3) is provided above the workbench (1), and the extraction tank (3) is fixedly connected to the workbench (1). A tank cover (4) is provided above the extraction tank (3), and a feeding cap (6) is provided above the tank cover (4). The feeding cap (6) is threadedly connected to the tank cover (4). A discharge valve assembly (20) is provided at the lower end of the tank cover (4), and the discharge valve assembly (20) is connected to the tank cover (4) as a whole. A collection hopper (7) is provided below the workbench (1), and the collection hopper (7) is located below the discharge valve assembly (20). Filter paper (22) is provided inside the collection hopper (7), and the filter paper (22) is connected to the collection hopper (7) as a whole. The end face of the filter paper (22) is arc-shaped. An exhaust fan (8) and a purification box (9) are provided above the workbench (1), and the exhaust fan (8) and the purification box (9) are connected to the workbench (1) by screws. The exhaust fan (8) and the purification box (9) are connected in a continuous manner. A first connecting pipe (10) is provided above the exhaust fan (8), and the two ends of the first connecting pipe (10) are respectively connected to the can cover (4) and the exhaust fan (8). Activated carbon catalytic packing (16) is provided inside the purification box (9), and the activated carbon catalytic packing (16) is fixedly connected to the purification box (9). An exhaust pipe (11) is provided above the purification box (9), and one end of the exhaust pipe (11) is connected to the purification box (9) as a whole. A first solenoid valve (12) is provided on the exhaust pipe (11).

2. The integrated device for rapid extraction and purification of semi-volatile organic compounds in soil according to claim 1, characterized in that: An organic matter detection probe (15) is provided on one side of the purification box (9), and the organic matter detection probe (15) is connected to the purification box (9) as a whole. The organic matter detection probe (15) is located above the activated carbon catalytic packing (16).

3. The integrated device for rapid extraction and purification of semi-volatile organic compounds in soil according to claim 1, characterized in that: A filter screen (17) is provided at the lower end of the can lid (4), and the filter screen (17) is fixedly connected to the can lid (4). The filter screen (17) is located below the first connecting pipe (10). A second connecting pipe (13) is provided between the first connecting pipe (10) and the exhaust pipe (11). The two ends of the second connecting pipe (13) are connected to the first connecting pipe (10) and the exhaust pipe (11) respectively. A second solenoid valve (14) is provided on the second connecting pipe (13).

4. The integrated device for rapid extraction and purification of semi-volatile organic compounds in soil according to claim 1, characterized in that: A servo motor (5) is provided above the extraction tank (3), and the servo motor (5) is connected to the extraction tank (3) by screws. A stirring paddle (18) is provided inside the extraction tank (3), and the stirring paddle (18) is connected to the output end of the servo motor (5). The stirring paddle (18) is rotatably connected to the extraction tank (3). A scraper (19) is provided on the outside below the stirring paddle (18), and the scraper (19) is fixedly connected to the stirring paddle (18). The scraper (19) is in contact with the inner wall of the extraction tank (3).

5. The integrated device for rapid extraction and purification of semi-volatile organic compounds in soil according to claim 1, characterized in that: A temperature sensor (28) is provided on one side of the extraction tank (3), and the temperature sensor (28) is connected to the extraction tank (3) as a whole. The extraction tank (3) includes an inner liner (25), an outer shell (26) and an electric heating strip (27). The inner liner (25) is located inside the outer shell (26), and the inner liner (25) is fixedly connected to the outer shell (26). The electric heating strip (27) is located outside the inner liner (25). There are six electric heating strips (27), and the inner liner (25) and the electric heating strips (27) are connected by screws. The six electric heating strips (27) are equidistantly arranged outside the inner liner (25).

6. The integrated device for rapid extraction and purification of semi-volatile organic compounds in soil according to claim 1, characterized in that: A first connecting frame (23) is provided below the workbench (1). There are two first connecting frames (23), and the first connecting frame (23) is connected to the workbench (1) by screws. A second connecting frame (24) is provided on both sides of the collection hopper (7). There are two second connecting frames (24), and the second connecting frame (24) is connected to the collection hopper (7) by screws. The second connecting frame (24) and the first connecting frame (23) are slidably connected.

7. The integrated device for rapid extraction and purification of semi-volatile organic compounds in soil according to claim 1, characterized in that: The inside of the collection hopper (7) is provided with a grid (21), and the grid (21) is fixedly connected to the collection hopper (7). The grid (21) is located above the filter paper (22).

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