Chemical oxidation-microorganism-heat strengthening synergistic remediation equipment for organic contaminated soil

Abstract

The utility model belongs to the technical field of soil remediation, and particularly relates to organic contaminated soil chemical oxidation-microorganism-heat strengthening synergistic remediation equipment which comprises a first remediation workshop, a chemical agent supply device, a microbial agent supply device, a stirring and uniform mixing device and a high-temperature air supply device. A stirring and uniform mixing device, a high-temperature air nozzle and a medicament nozzle are arranged in the first repairing workshop, the high-temperature air supply device is communicated with the high-temperature air nozzle, and the chemical agent supply device and the microbial agent supply device are both communicated with the medicament nozzle. According to the utility model, high-temperature air is introduced into the first remediation workshop to promote chemical agents and microbial agents to decompose refractory organic pollutants into volatile organic pollutants and transfer the organic pollutants from the polluted soil to the air; high-temperature air, microorganisms and chemical oxidation cooperate to repair easily-degradable and medium-low-concentration degradation-resistant organic contaminated soil, the repair efficiency can be improved, and the repair period can be shortened.

Description

Technical Field

[0001] The utility model belongs to the technical field of soil remediation, and in particular relates to a chemical oxidation-microorganism-heat enhancement synergistic remediation equipment for organic polluted soil. Background Art

[0002] Organic pollutants are common pollutants in my country's soil, posing a great threat to the ecological environment and residents' health. Current organic contaminated soil remediation technologies include chemical oxidation, microorganisms, and thermal desorption. Thermal desorption technology is often used to remediate high-concentration, difficult-to-degrade organic pollutants. By consuming natural gas to create a high-temperature environment, high-concentration, difficult-to-degrade organic pollutants are thoroughly decomposed. However, the existing thermal desorption technology has a low heat utilization rate, and a large amount of heat is carried away by high-temperature flue gas and directly discharged into the atmosphere, resulting in a huge waste of heat. For easily degradable and medium- and low-concentration difficult-to-degrade organic pollutants, chemical oxidation and microorganisms are often used for coordinated remediation, but the remediation speed is slow and often cannot meet the construction period requirements of the contaminated site. Utility Model Content

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the utility model is to provide an organic contaminated soil chemical oxidation-microorganism-thermal enhancement synergistic remediation equipment which is economical and efficient, easy to operate, rational in structure, highly adaptable and can be applied on an engineering scale.

[0004] To achieve the above-mentioned purpose, the technical solution of the utility model is a chemical oxidation-microorganism-thermal enhancement synergistic remediation equipment for organic contaminated soil, including a first remediation workshop, a chemical agent supply device, a microbial agent supply device, a stirring and mixing device and a high-temperature air supply device; a high-temperature air nozzle and an agent nozzle are arranged on the top of the first remediation workshop, the high-temperature air supply device is connected to the high-temperature air nozzle, and the chemical agent supply device and the microbial agent supply device are both connected to the agent nozzle; a stirring and mixing device is also arranged in the first remediation workshop.

[0005] Furthermore, the stirring and mixing device includes a movable pulley, a motor and a mixer. A top beam is provided on the top of the first repair workshop, the movable pulley is slidably installed on the top beam, the motor is installed on the movable pulley through a bracket, and the output shaft of the motor is connected to the mixer.

[0006] Furthermore, the chemical agent supply device includes a first agent tank for providing chemical agents, the first agent tank is connected to the agent nozzle through a first agent pump, and a first metering valve is arranged on the pipeline between the first agent tank and the first agent pump.

[0007] Furthermore, the microbial agent supply device includes a second agent tank for providing the microbial agent, the second agent tank is connected to the agent nozzle through a second agent pump, and a second metering valve is arranged on the pipeline between the second agent tank and the second agent pump.

[0008] Furthermore, the high-temperature air supply device includes an air heating chamber, which is provided with an air inlet and an air outlet. The air inlet is connected to the atmosphere through a second vacuum pump, and the air outlet is connected to the high-temperature air nozzle through a pipeline.

[0009] Furthermore, the air heating chamber is arranged in a high-temperature smoke chamber, a high-temperature smoke inlet is arranged at one end of the high-temperature smoke chamber, and a high-temperature smoke outlet is arranged at the other end. The high-temperature smoke inlet is connected to the high-temperature smoke exhaust chimney of the thermal desorption system through a first vacuum pump, and the high-temperature smoke outlet is connected to the exhaust gas treatment unit.

[0010] Furthermore, the equipment also includes a second repair workshop, and the first repair workshop is arranged in the second repair workshop.

[0011] Furthermore, the first repair workshop and the second repair workshop are connected to the exhaust gas treatment unit through a negative pressure extraction device.

[0012] Furthermore, the negative pressure extraction device includes a third vacuum pump and a fourth vacuum pump, the top of the first repair workshop is connected to the air inlet of the exhaust gas treatment device through the third vacuum pump, and the top of the second repair workshop is connected to the air inlet of the exhaust gas treatment device through the fourth vacuum pump.

[0013] Furthermore, a first sealing door is arranged at the bottom of the first repair workshop, a second sealing door is arranged at a position corresponding to the first sealing door in the second repair workshop, and a third sealing door is arranged on the outer side of the second sealing door.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] (1) The utility model sprays chemical agents and microbial agents into easily degradable and medium-low concentration difficult-to-degrade organic polluted soils through chemical agent supply devices and microbial agent supply devices, and stirs them evenly through a stirring and mixing device. The organic polluted soils are heated by introducing high-temperature air into the first remediation workshop, thereby promoting chemical agents and microbial agents to decompose difficult-to-degrade organic pollutants into easily volatile organic pollutants and transfer organic pollutants from the contaminated soil to the air. The easily degradable and medium-low concentration difficult-to-degrade organic polluted soils are synergistically repaired through high-temperature air, microorganisms, and chemical oxidation, which can improve the remediation efficiency and shorten the remediation period.

[0016] (2) The utility model can reduce the possibility of pollutants leaking into the environment and improve the safety and reliability of the entire repair system by setting up a second repair workshop outside the first repair workshop. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of the organic contaminated soil chemical oxidation-microorganism-thermal enhancement synergistic remediation equipment provided by the embodiment of the utility model;

[0019] In the figure: 1, high-temperature flue gas exhaust pipe; 2, first vacuum pump; 3, first stop valve; 4, second vacuum pump; 5, first flow meter; 6, high-temperature flue gas warehouse; 7, high-temperature flue gas inlet; 8, first multi-parameter monitor; 9, high-temperature flue gas outlet; 10, air heating warehouse; 11, air inlet; 12, second multi-parameter monitor; 13, first repair workshop; 14, second repair workshop; 15, high-temperature air vertical pipe; 16, high-temperature air horizontal pipe; 17, high-temperature air nozzle; 18, agent nozzle; 19, third multi-parameter monitor; 20, fourth multi-parameter monitor; 21, shift Movable pulley; 22. Motor; 23. Agitator; 24. First sealing door; 25. Second sealing door; 26. Third sealing door; 27. Third vacuum pump; 28. Second flow meter; 29. ​​Fourth vacuum pump; 30. Third flow meter; 31. Exhaust gas treatment device; 32. Second stop valve; 33. Fifth vacuum pump; 34. Exhaust gas exhaust pipe; 35. First chemical pump; 36. First metering valve; 37. First chemical tank; 38. Second chemical pump; 39. Second metering valve; 40. Second chemical tank; 41. Third chemical pump; 42. Third metering valve; 43. Third chemical tank. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0023] like Figure 1 As shown, this embodiment provides an organic contaminated soil chemical oxidation-microorganism-thermal enhancement synergistic remediation equipment, including a first remediation workshop 13, a chemical agent supply device, a microbial agent supply device, a stirring and mixing device and a high-temperature air supply device; a high-temperature air nozzle 17 and an agent nozzle 18 are arranged on the top of the first remediation workshop 13, the high-temperature air supply device is connected to the high-temperature air nozzle 17, and the chemical agent supply device and the microbial agent supply device are both connected to the agent nozzle 18; a stirring and mixing device is also arranged in the first remediation workshop 13. In this embodiment, chemical agents and microbial agents are sprayed into easily degradable and medium-low concentration difficult-to-degrade organic contaminated soils through chemical agent supply devices and microbial agent supply devices, and are evenly stirred through a stirring and mixing device. High-temperature air is introduced into the first remediation workshop 13 to heat the organic contaminated soil, thereby promoting the chemical agents and microbial agents to decompose the difficult-to-degrade organic pollutants into easily volatile organic pollutants and transfer the organic pollutants from the contaminated soil to the air. The easily degradable and medium-low concentration difficult-to-degrade organic contaminated soils are synergistically repaired through high-temperature air, microorganisms, and chemical oxidation, which can improve the remediation efficiency and shorten the remediation period.

[0024] The above embodiment is optimized, the stirring and mixing device includes a mobile pulley 21, a motor 22 and a mixer 23, a top beam is provided on the top of the first repair workshop 13, the mobile pulley 21 is slidably mounted on the top beam, the motor 22 is mounted on the mobile pulley 21 through a bracket, and the output shaft of the motor 22 is connected to the mixer 23. Specifically, the top beam can be made of I-beam, and the two mobile pulleys 21 are respectively slidably mounted on the lower flange plates on both sides of the web of the I-beam, and the rotating shafts of the two mobile pulleys 21 are rotatably connected to the bracket, and the mobile pulley 21 moves along the I-beam, thereby driving the motor 22 and the mixer 23 to move along the top beam, stirring the organic contaminated soil in the first repair workshop 13, and promoting the continuous transfer of organic pollutants from the soil to the air. In this embodiment, according to the size of the first repair workshop 13, multiple stirring and mixing devices can be arranged at intervals in the first repair workshop 13.

[0025] Furthermore, the chemical agent supply device includes a first agent tank 37 for providing chemical agents, the first agent tank 37 is connected to the agent nozzle 18 through a first agent pump 35, and a first metering valve 36 is arranged on the pipeline between the first agent tank 37 and the first agent pump 35. Specifically, the drug outlet of the first agent tank 37 is connected to the drug inlet of the first agent pump 35 through a pipeline, and a first metering valve 36 is arranged on the pipeline between the first agent tank 37 and the first agent pump 35.

[0026] Furthermore, the microbial agent supply device includes a second agent tank 40 for providing the microbial agent, the second agent tank 40 is connected to the agent nozzle 18 through a second agent pump 38, and a second metering valve 39 is arranged on the pipeline between the second agent tank 40 and the second agent pump 38. Specifically, the drug outlet of the second agent tank 40 is connected to the drug inlet of the second agent pump 38 through a pipeline, and a second metering valve 39 is arranged on the pipeline between the second agent tank 40 and the second agent pump 38.

[0027] Furthermore, the equipment also includes a nutrient solution supply device, which includes a third medicine tank 43 for providing nutrient solution, and the third medicine tank 43 is connected to the medicine nozzle 18 through a third medicine pump 41. Specifically, the medicine outlet of the third medicine tank 43 is connected to the medicine inlet of the third medicine pump 41 through a pipeline, a third metering valve 42 is arranged on the pipeline between the third medicine tank 43 and the third medicine pump 41, and the medicine outlets of the first medicine pump 35, the second medicine pump 38, and the third medicine pump 41 are connected to the medicine nozzle 18 through a pipeline.

[0028] In one embodiment, the high-temperature air supply device includes an air heating chamber 10, the air heating chamber 10 is provided with an air inlet 11 and an air outlet, the air inlet 11 is connected to the atmosphere through a second air pump 4, and the air outlet is connected to the high-temperature air nozzle 17 through a pipeline. The air heating chamber 10 is a stainless steel sealed chamber body.

[0029] Further, a high-temperature air supply pipeline is provided in the first repair workshop 13, and the high-temperature air supply pipeline includes a high-temperature air vertical pipe 15 and a high-temperature air horizontal pipe 16. The high-temperature air vertical pipe 15 is provided on the inner side of the first repair workshop 13, and the bottom end of the high-temperature air vertical pipe 15 is connected to the air outlet, and the top end of the high-temperature air vertical pipe 15 is connected to the high-temperature air horizontal pipe 16; the lower surface of the high-temperature air horizontal pipe 16 is provided with a high-temperature air nozzle 17. The high-temperature air vertical pipe 15 and the high-temperature air horizontal pipe 16 are both hollow stainless steel pipes. In one embodiment, both ends of the air heating warehouse 10 are connected to the high-temperature air vertical pipe 15, and the two ends of the high-temperature air horizontal pipe 16 are respectively connected to the high-temperature air vertical pipe 15 on both sides. In this embodiment, according to the size of the first repair workshop 13, a plurality of high-temperature air horizontal pipes 16 can be arranged at intervals in the first repair workshop 13, and both ends of each high-temperature air horizontal pipe 16 are connected to the air heating warehouse 10 through the high-temperature air vertical pipe 15.

[0030] Furthermore, the air heating bin 10 is arranged in the high-temperature flue gas bin 6, one end of the high-temperature flue gas bin 6 is provided with a high-temperature flue gas inlet 7, and the other end is provided with a high-temperature flue gas outlet 9, the high-temperature flue gas inlet 7 is connected to the high-temperature flue gas exhaust pipe 1 of the thermal desorption system through the first vacuum pump 2, and the high-temperature flue gas outlet 9 is connected to the exhaust gas treatment unit. Among them, the high-temperature flue gas bin 6 is a stainless steel sealed bin body. In this embodiment, the high-temperature flue gas of the thermal desorption system is used as a heat source, and heat is exchanged between the high-temperature flue gas and the air in the air heating bin 10 to increase the temperature of the air entering the first repair workshop 13, accelerate the volatilization and decomposition of organic pollutants, and improve the repair effect. At the same time, the heat in the high-temperature flue gas generated during the thermal desorption process can also be recovered and reused to reduce the impact on the environment.

[0031] Furthermore, the air inlet of the first vacuum pump 2 is connected to the high-temperature flue gas exhaust chimney 1 through a pipe, and the air outlet of the first vacuum pump 2 is connected to the high-temperature flue gas inlet 7 through a pipe. The first stop valve 3 is connected to the pipe between the first vacuum pump 2 and the high-temperature flue gas inlet 7.

[0032] like Figure 1As shown, a first multi-parameter monitor 8 is provided in the high-temperature smoke bin 6, and the first multi-parameter monitor 8 is used to monitor the temperature and pressure in the high-temperature smoke bin 6 in real time; a second multi-parameter monitor 12 is provided in the air heating bin 10, and the second multi-parameter monitor 12 is used to monitor the temperature and pressure in the air heating bin 10 in real time.

[0033] Furthermore, the equipment also includes a second repair workshop 14, and the first repair workshop 13 is arranged in the second repair workshop 14. In this embodiment, by arranging the second repair workshop 14 outside the first repair workshop 13, the possibility of pollutants leaking into the environment can be reduced, and the safety and reliability of the entire repair system can be improved.

[0034] In this embodiment, the first repair workshop 13 and the second repair workshop 14 are both sealed steel structure greenhouses to ensure that the polluted gas in the first repair workshop 13 does not leak out, reducing the impact on the surrounding environment; the first repair workshop 13 and the second repair workshop 14 are both arranged above the high-temperature smoke bin 6, and the first repair workshop 13 is arranged in the second repair workshop 14.

[0035] Optimizing the above embodiment, the first repair workshop 13 and the second repair workshop 14 are connected to the tail gas treatment unit through a negative pressure extraction device. In this embodiment, the negative pressure extraction device is used to ensure that the first repair workshop 13 and the second repair workshop 14 always maintain a negative pressure environment during the repair process to prevent organic pollutants from diffusing into the outside air.

[0036] Specifically, the negative pressure extraction device includes a third air pump 27 and a fourth air pump 29, the air inlet of the third air pump 27 is connected to the top of the first repair workshop 13, the air outlet of the third air pump 27 is connected to the air inlet of the exhaust gas treatment unit, the air inlet of the fourth air pump 29 is connected to the top of the second repair workshop 14, and the air outlet of the fourth air pump 29 is connected to the air inlet of the exhaust gas treatment unit. Furthermore, a second flow meter 28 is provided between the air outlet of the third air pump 27 and the air inlet of the exhaust gas treatment unit, and a third flow meter 30 is provided between the air outlet of the fourth air pump 29 and the air inlet of the exhaust gas treatment unit.

[0037] Furthermore, a first sealing door 24 is provided at the bottom of the first repair workshop 13, a second sealing door 25 is provided at a position corresponding to the first sealing door 24 on the second repair workshop 14, and a third sealing door 26 is provided on the outer side of the second sealing door 25 to enhance the sealing performance of the repair workshop and prevent organic pollutant gas from escaping into the air.

[0038] In this embodiment, a third multi-parameter monitor 19 is provided in the first repair workshop 13, and the third multi-parameter monitor 19 is arranged on the top of the first repair workshop 13, and is used for real-time monitoring of the pollutant concentration, pressure and temperature in the first repair workshop 13; a fourth multi-parameter monitor 20 is provided in the second repair workshop 14, and the fourth multi-parameter monitor 20 is arranged on the top of the second repair workshop 14, and is used for real-time monitoring of the pollutant concentration, pressure and temperature in the second repair workshop 14.

[0039] Further, the exhaust gas treatment unit includes an exhaust gas treatment device 31 and an exhaust gas exhaust pipe 34, the high-temperature flue gas outlet 9 of the high-temperature flue gas supply device, the first repair workshop 13 and the second repair workshop 14 are all connected to the air inlet of the exhaust gas treatment device 31, and the air outlet of the exhaust gas treatment device 31 is connected to the exhaust gas exhaust pipe 34 through the fifth air pump 33. Specifically, the high-temperature flue gas outlet 9, the air outlet of the second flow meter 28, and the third flow meter 30 are respectively connected to the air inlet of the exhaust gas treatment device 31 through pipelines, the air outlet of the exhaust gas treatment device 31 is connected to the air inlet of the fifth air pump 33 through a pipeline, the air outlet of the fifth air pump 33 is connected to the exhaust gas exhaust pipe 34 through a pipeline, and a second stop valve 32 is provided between the pipeline between the exhaust gas treatment device 31 and the fifth air pump 33.

[0040] The organic contaminated soil chemical oxidation-microorganism-thermal enhancement synergistic remediation equipment of this embodiment also includes a control device, which includes a pipeline collector and a central control computer. One end of the pipeline collector is connected to the first vacuum pump 2, the first stop valve 3, the second vacuum pump 4, the first flowmeter 5, the first multi-parameter monitor 8, the second multi-parameter monitor 12, the third multi-parameter monitor 19, the fourth multi-parameter monitor 20, the motor 22, the mixer 23, the first sealing door 24, the second sealing door 25, the third sealing door 26, the third vacuum pump 27, the second flowmeter 28, the fourth vacuum pump 29, the third flowmeter 30, the exhaust gas treatment device 31, the second stop valve 32, the fifth vacuum pump 33, the first chemical pump 35, the first metering valve 36, the first chemical tank 37, the second chemical pump 38, the second metering valve 39, the second chemical tank 40, the third chemical pump 41, the third metering valve 42, and the third chemical tank 43 through a pipeline, and the other end of the pipeline collector is connected to the central control computer through a pipeline.

[0041] The organic contaminated soil chemical oxidation-microorganism-thermal enhancement synergistic remediation equipment of this embodiment is used to remediate the organic contaminated soil. The remediation process includes a contaminated soil pretreatment process, a contaminated soil filling process, a remediation parameter setting and regulation process, a high-temperature flue gas and high-temperature air supply process, a reagent supply process, a stirring and mixing remediation process, a negative pressure extraction process, an exhaust gas treatment process, and a soil acceptance and transportation process after remediation.

[0042] Contaminated soil pretreatment process: the organic contaminated soil to be repaired is excavated, crushed, and sieved to remove impurities such as stones and plastics in the contaminated soil and set aside.

[0043] Contaminated soil filling process: open the third sealed door 26, the second sealed door 25, and the first sealed door 24 respectively, use a forklift to transport the pre-treated organic contaminated soil to the first remediation workshop 13, use an excavator to build a pile of contaminated soil, and then close the first sealed door 24, the second sealed door 25, and the third sealed door 26.

[0044] Restoration parameter setting and control process: First, based on the types of organic pollutants in the soil, pollutant concentrations, and restoration target values, determine the process parameters required for the high-temperature flue gas and high-temperature air supply process, the agent supply process, the negative pressure extraction process, the exhaust gas treatment process, the stirring and mixing restoration process, etc., then power on the pipeline collector and the central control computer, input the determined process parameters of each restoration process into the pipeline collector and the central control computer, and then complete the restoration process according to the following process. During the restoration process, the pipeline collector and the central control computer accurately monitor each restoration process and accurately and precisely control each restoration parameter.

[0045] High-temperature flue gas and high-temperature air supply process: the first vacuum pump 2, the first stop valve 3, the second vacuum pump 4, and the first flow meter 5 are powered on and started respectively, the first vacuum pump 2 extracts the high-temperature flue gas in the high-temperature flue gas exhaust pipe 1, and the high-temperature gas enters the high-temperature flue gas bin 6 for temporary storage through the first stop valve 3 and the high-temperature flue gas inlet 7. The second vacuum pump 4 extracts normal-temperature air from the atmosphere, and the normal-temperature air enters the air heating bin 10 through the first flow meter 5. The high-temperature flue gas in the high-temperature flue gas bin 6 heats the normal-temperature air in the air heating bin 10 through heat exchange, and the first multi-parameter monitor 8 and the second multi-parameter monitor 12 monitor the temperature and pressure of the high-temperature flue gas bin 6 and the air heating bin 10 respectively.

[0046] High-temperature heating process: The high-temperature air in the air heating chamber 10 enters the high-temperature air vertical pipe 15 and the high-temperature air horizontal pipe 16 in turn, and is sprayed into the surface of the contaminated soil in the first remediation workshop 13 through the high-temperature air nozzle 17. The high-temperature air heats the contaminated soil in the first remediation workshop 13, promotes chemical agents and microbial agents to decompose difficult-to-degrade organic pollutants into easily volatile organic pollutants, and transfers organic pollutants from the contaminated soil to the air.

[0047] Agent supply process: the first agent pump 35, the first metering valve 36, the first agent tank 37, the second agent pump 38, the second metering valve 39, the second agent tank 40, the third agent pump 41, the third metering valve 42, and the third agent tank 43 are respectively powered on and started, the first agent pump 35 extracts the chemical agent from the first agent tank 37, the first metering valve 36 measures the extracted volume of the chemical agent at all times, the second agent pump 38 extracts the microbial agent from the second agent tank 40, the second metering valve 39 measures the extracted volume of the microbial agent at all times, the third agent pump 41 extracts the nutrient solution from the third agent tank 43, the third metering valve 42 measures the extracted volume of the nutrient solution at all times, and the extracted chemical agent, microbial agent, and nutrient solution are evenly sprayed on the surface of the contaminated soil sprayed into the first remediation workshop 13 through the agent nozzle 18;

[0048] Even mixing repair process: the mobile pulley 21, the motor 22, and the mixer 23 are powered on and started. The mobile pulley 21 drives the motor 22 and the mixer 23 to move continuously on the top beam of the first repair workshop 13. The rotation of the motor 22 drives the mixer 23 to rotate, and the chemical agents, microbial agents, nutrient solution and contaminated soil are evenly mixed. Under the reinforcement of high-temperature air, the chemical agents, microbial agents, nutrient solution and pollutants in the contaminated soil undergo, decompose, oxidize and activate reactions, and the difficult-to-degrade organic pollutants are decomposed into easily volatile organic pollutants. The organic pollutants are continuously transferred from the soil to the air.

[0049] Negative pressure extraction process: the third multi-parameter monitor 19, the fourth multi-parameter monitor 20, the third vacuum pump 27, the second flowmeter 28, the fourth vacuum pump 29, and the third flowmeter 30 are powered on and started. The third vacuum pump 27 continuously extracts the air in the first repair workshop 13, and the second flowmeter 28 measures the volume of air extracted by the third vacuum pump 27 at all times. The fourth vacuum pump 29 continuously extracts the air in the second repair workshop 14, and the third flowmeter 30 measures the volume of air extracted by the fourth vacuum pump 29 at all times. The third multi-parameter monitor 19 measures the concentration, pressure, and temperature of pollutants in the first repair workshop 13 at all times, and the fourth multi-parameter monitor 20 measures the concentration, pressure, and temperature of pollutants in the second repair workshop 14 at all times. During the repair process, the first repair workshop 13 and the second repair workshop 14 always maintain a negative pressure environment, and the air pressure in the first repair workshop 13 is lower than the air pressure in the second repair workshop 14, which effectively prevents organic pollutants from diffusing into the outside air.

[0050] Exhaust gas treatment process: the exhaust gas treatment device 31, the second stop valve 32, and the fifth vacuum pump 33 are powered on and started, the high-temperature flue gas from the high-temperature flue gas bin 6 is discharged into the exhaust gas treatment device 31 through the high-temperature flue gas outlet 9 through the pipeline, the third vacuum pump 27 and the fourth vacuum pump 29 respectively discharge the polluted air from the first repair workshop 13 and the second repair workshop 14 into the exhaust gas treatment device 31, the exhaust gas treatment device 31 treats the exhaust gas to meet the standards through multiple methods such as multi-stage dust removal, high-temperature decomposition, and catalytic oxidation, and the fifth vacuum pump 33 discharges the exhaust gas that meets the standards into the exhaust exhaust chimney 34 through the second stop valve 32.

[0051] Acceptance and transportation process of soil after restoration: First, open the third sealed door 26, the second sealed door 25, and the first sealed door 24, take representative soil samples for testing, and if the contaminated soil restoration meets the standards, the contaminated soil that meets the standards will be transported for use. If the contaminated soil restoration does not meet the standards, close the first sealed door 24, the second sealed door 25, and the third sealed door 26, and repeat the above restoration process until the contaminated soil restoration meets the standards.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An organic contaminated soil chemical oxidation-microorganism-thermal enhancement synergistic remediation equipment, characterized by: It includes a first repair workshop, a chemical agent supply device, a microbial agent supply device, a stirring and mixing device and a high-temperature air supply device; a high-temperature air nozzle and an agent nozzle are arranged on the top of the first repair workshop, the high-temperature air supply device is connected to the high-temperature air nozzle, and the chemical agent supply device and the microbial agent supply device are both connected to the agent nozzle; a stirring and mixing device is also arranged in the first repair workshop.

2. The organic contaminated soil chemical oxidation-microorganism-thermal enhancement synergistic remediation equipment according to claim 1, characterized in that: The stirring and mixing device includes a movable pulley, a motor and a stirrer. A top beam is provided on the top of the first repair workshop, the movable pulley is slidably installed on the top beam, the motor is installed on the movable pulley through a bracket, and the output shaft of the motor is connected to the stirrer.

3. The organic contaminated soil chemical oxidation-microorganism-thermal enhancement synergistic remediation equipment according to claim 1, characterized in that: The chemical agent supply device includes a first agent tank for providing chemical agents, the first agent tank is connected to the agent nozzle through a first agent pump, and a first metering valve is arranged on the pipeline between the first agent tank and the first agent pump.

4. The organic contaminated soil chemical oxidation-microorganism-thermal enhancement synergistic remediation equipment according to claim 1, characterized in that: The microbial agent supply device comprises a second agent tank for providing the microbial agent, the second agent tank is connected to the agent nozzle via a second agent pump, and a second metering valve is arranged on the pipeline between the second agent tank and the second agent pump.

5. The organic contaminated soil chemical oxidation-microorganism-thermal enhancement synergistic remediation equipment according to claim 1, characterized in that: The high-temperature air supply device comprises an air heating chamber, which is provided with an air inlet and an air outlet. The air inlet is connected to the atmosphere through a second vacuum pump, and the air outlet is connected to the high-temperature air nozzle through a pipeline.

6. The organic contaminated soil chemical oxidation-microorganism-thermal enhancement synergistic remediation equipment according to claim 5, characterized in that: The air heating chamber is arranged in the high-temperature smoke chamber, one end of the high-temperature smoke chamber is provided with a high-temperature smoke inlet, and the other end is provided with a high-temperature smoke outlet. The high-temperature smoke inlet is connected to the high-temperature smoke exhaust pipe of the thermal desorption system through a first vacuum pump, and the high-temperature smoke outlet is connected to the exhaust gas treatment unit.

7. The organic contaminated soil chemical oxidation-microorganism-thermal enhancement synergistic remediation equipment according to claim 1, characterized in that: It also includes a second repair workshop, and the first repair workshop is arranged in the second repair workshop.

8. The organic contaminated soil chemical oxidation-microorganism-thermal enhancement synergistic remediation equipment according to claim 7, characterized in that: The first repair workshop and the second repair workshop are connected to the tail gas treatment unit through a negative pressure extraction device.

9. The organic contaminated soil chemical oxidation-microorganism-thermal enhancement synergistic remediation equipment according to claim 8, characterized in that: The negative pressure extraction device includes a third vacuum pump and a fourth vacuum pump. The top of the first repair workshop is connected to the air inlet of the exhaust gas treatment unit through the third vacuum pump, and the top of the second repair workshop is connected to the air inlet of the exhaust gas treatment unit through the fourth vacuum pump.

10. The organic contaminated soil chemical oxidation-microorganism-thermal enhancement synergistic remediation equipment according to claim 7, characterized in that: A first sealing door is arranged at the bottom of the first repair workshop, a second sealing door is arranged at a position corresponding to the first sealing door in the second repair workshop, and a third sealing door is arranged on the outer side of the second sealing door.

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