A synergistic elution system and method for pesticide-contaminated sites

Abstract

The application discloses a pesticide-polluted site synergistic elution system and an elution method, which comprise a containing support structure and a vapor elution mechanism arranged in the containing support structure; the containing support structure comprises a soil containing shell with an opening facing upwards; the vapor elution mechanism comprises a vapor elution support containing shell fixed to the bottom of the soil containing shell, the top of the vapor elution support containing shell is provided with a plurality of fixed fitting holes in communication with the inside of the vapor elution support containing shell, and a vertical aeration output pipe is fixedly arranged in the fixed fitting hole; an aeration conveying pipe is fixedly arranged in the aeration output pipe, and the lower end of the aeration output pipe is provided with a butterfly-shaped airtight valve; soil is powdered, classified according to the particle size of soil particles, and subjected to elution and purification in the soil containing shell by using a mixed gas of high-temperature air and elution liquid vapor, so that organic pesticide residues in the polluted soil can be effectively separated and removed.

Description

Technical Field

[0001] This invention relates to the field of contaminated soil remediation technology, specifically to an enhanced elution system and elution method for pesticide-contaminated sites. Background Technology

[0002] Organochlorine pesticides are structurally stable, highly toxic, and difficult to decompose in soil, with natural degradation times ranging from several years to decades. Compared to general chemical-contaminated sites, they are characterized by long persistence, significant pollution hazards, and high risks to human health and the environment. Preliminary estimates suggest that my country's soil remediation and wastewater treatment market could reach trillions of yuan in the coming years. Many foreign companies are seeking markets in my country. However, importing foreign technologies and equipment is costly and prohibitive. Due to the different national conditions for contaminated site remediation in my country (such as significant differences in the types and intensities of pollutants compared to foreign countries), the practical feasibility of applying existing foreign technologies in my country needs to be verified through engineering practice. Therefore, accelerating the research and development of remediation technologies and equipment with independent intellectual property rights in my country is extremely urgent to meet the needs of my country's site remediation market and improve the level of soil remediation and wastewater treatment technology in my country.

[0003] Among related technologies, soil remediation mainly employs physical, chemical, and biological remediation methods, using in-situ or ex-situ remediation to treat contaminated soil. However, these methods involve large-scale engineering projects and have many shortcomings, such as high energy consumption, high costs, and limitations in treating many pollutants. Summary of the Invention

[0004] The purpose of this invention is to provide an enhanced elution system and elution method for pesticide-contaminated sites, which can effectively decompose and separate pesticide residues in the soil.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A pesticide contaminated site enhancement elution system includes a housing support structure and a steam elution mechanism disposed within the housing support structure.

[0007] The supporting structure includes an upward-facing soil containment shell;

[0008] The steam washing mechanism includes a steam washing support housing fixed to the bottom of the soil housing, and the top of the steam washing support housing has multiple fixing holes that communicate with its interior. Vertically extending aeration output pipes are fixed in the fixing holes.

[0009] An aeration delivery pipe is fixedly installed inside the aeration output pipe, and a butterfly-shaped sealing valve is located at the lower end of the aeration output pipe.

[0010] The top of the aeration output pipe is provided with an exhaust dispersion mechanism, which includes an exhaust dispersion support shell fixed on the top of the aeration output pipe, the exhaust dispersion support shell is a conical shell with a pointed top, and the side of the exhaust dispersion support shell has a plurality of internal and external through dispersion exhaust through holes;

[0011] Airtight constraint ring is fixedly arranged on the outside of the exhaust dispersion support shell at the dispersion exhaust through hole, the outer side of the airtight constraint ring is a conical surface structure, and the outer side of the airtight constraint ring is in contact with airtight conical shell.

[0012] An airflow guide constraint ring is fixedly arranged on the periphery of the airtight constraint ring, and the inner side of the airflow guide constraint ring is an arc surface structure.

[0013] An airtight conical shell control cylinder is fixedly arranged on the inner side of the exhaust dispersion support shell, the airtight conical shell control cylinder is coaxial with the dispersion exhaust through hole, one end of the airtight conical shell control cylinder close to the dispersion exhaust through hole is an open end, an airtight conical shell control column is slidably arranged in the airtight conical shell control cylinder, and the airtight conical shell control column is fixedly connected with the airtight conical shell through a fixed connecting rod.

[0014] A stretch return spring is fixedly connected between the other end of the airtight conical shell control column and the inner end of the airtight conical shell control cylinder.

[0015] Preferably, the top of the soil containing shell is fixedly provided with an annular anti-overflow surrounding shell, and the anti-overflow surrounding shell has a horn structure with a large upper part and a small lower part.

[0016] Description: The anti-overflow surrounding shell can effectively prevent soil particles in the soil containing shell from splashing outside the soil containing shell.

[0017] Preferably, the bottom of the soil containing shell is provided with a buffer support structure, the buffer support structure includes a buffer support base, a plurality of buffer support telescopic rods are connected between the top of the buffer support base and the bottom of the soil containing shell, the buffer support telescopic rods are hydraulic telescopic rods, the outer rod end of the buffer support telescopic rod is connected to the top of the buffer support base in the form of a spherical hinge, and the inner rod end of the buffer support telescopic rod is connected to the bottom of the soil containing shell in the form of a spherical hinge.

[0018] Description: The buffer support telescopic rod is an electromagnetic suspension support rod, which can provide good and stable support for the entire soil containing shell, and is convenient for adjusting the support strength of the buffer support telescopic rod and the overall resonance frequency, thereby avoiding unnecessary resonance of the entire device and affecting the working efficiency.

[0019] Preferably, the aeration output pipe is provided with a steam mixing mechanism, the steam mixing mechanism includes a steam mixing output pipe fixed in the aeration output pipe and having a ring shape, and the upper side of the steam mixing output pipe has a plurality of steam nozzles in communication with the inside thereof.

[0020] Description: The steam elution solution is introduced into the steam mixing output pipe, and the steam elution solution is sprayed from the steam nozzles into the aeration output pipe. The steam elution solution mixes with the hot air in the aeration output pipe and is discharged from the dispersed exhaust holes.

[0021] Preferably, the steam elution support containing shell is provided with a cleaning circulation recovery mechanism. The cleaning circulation recovery mechanism includes a cleaning circulation support sliding rail fixed on the inner side wall of the steam elution support containing shell. The cleaning circulation support sliding rail is arranged horizontally. A cleaning circulation support sliding block is slidingly fitted on the cleaning circulation support sliding rail. The cleaning circulation support sliding block is driven by a servo motor to move along the cleaning circulation support sliding rail.

[0022] A cleaning scraper is fixed on the cleaning circulation support sliding block. Negative pressure instantaneous suction pipes are fixed at both ends of the cleaning circulation support sliding rail in the steam elution support containing shell. The side wall of the negative pressure instantaneous suction pipe has a plurality of through holes.

[0023] Description: A small amount of soil inevitably enters the aeration output pipe through the gap, falls into the bottom of the steam elution support containing shell, and is pushed to the negative pressure instantaneous suction pipe by the cleaning scraper. Under the action of negative pressure, the soil is sucked into the negative pressure instantaneous suction pipe and discharged.

[0024] Preferably, the top of the soil containing shell is provided with a movable stirring mechanism. The movable stirring mechanism includes two parallel stirring mechanism support sliding rails fixed on the top of the soil containing shell. Stirring mechanism support sliding blocks are slidingly fitted on the stirring mechanism support sliding rails. The stirring mechanism support sliding blocks are driven by a servo motor to move along the stirring mechanism support sliding rails.

[0025] A longitudinal support plate is fixed between the two stirring mechanism support sliding blocks. The extension direction of the longitudinal support plate is perpendicular to the extension direction of the stirring mechanism support sliding rails.

[0026] A longitudinal support sliding rail is fixed on the lower side of the longitudinal support plate. A longitudinal support sliding block is slidingly fitted on the longitudinal support sliding rail. The longitudinal support sliding block is driven by a servo motor to move along the longitudinal support sliding rail. A stirring mechanism containing shell is fixed on the lower end of the longitudinal support sliding block. The bottom of the stirring mechanism containing shell has a stirring shaft fitting hole communicating with the inside of the stirring mechanism containing shell. A vertical stirring shaft is rotationally fitted in the stirring shaft fitting hole. A plurality of vertical stirring rods are fixedly connected to the lower end of the stirring shaft. An electric motor for driving the stirring shaft to rotate is fixedly arranged in the stirring mechanism containing shell.

[0027] Description: The electric motor drives the stirring shaft to rotate. The stirring shaft drives the plurality of stirring rods to rotate. The plurality of stirring rods stir the soil in the soil containing shell.

[0028] Preferably, the soil containing shell is provided with an equalizing partition structure, which comprises an equalizing partition plate arranged in the soil containing shell and horizontally arranged, and a cylindrical and hollow partition plate support cylinder fixed to the inner side wall of the soil containing shell, the side surface of the partition plate support cylinder is provided with a lifting and vibrating matching groove extending vertically and penetrating in and out, and a lifting and vibrating support pipe penetrating vertically is slidably matched in the partition plate support cylinder and fixedly connected with the equalizing partition plate through a fixed connecting plate;

[0029] A lifting and vibrating support plate is fixedly arranged in the lifting and vibrating support pipe, and a vibrating drive rod is arranged on the upper and lower sides of the lifting and vibrating support plate, the vibrating drive rod is an electromagnetic vibrating drive rod, the outer rod end of the vibrating drive rod is connected with the inner end of the partition plate support cylinder in the form of a spherical hinge, and the inner rod end of the vibrating drive rod is connected with the lifting and vibrating support plate in the form of a spherical hinge.

[0030] The equalizing partition plate is provided with a plurality of vertical through holes.

[0031] It is specified that the equalizing partition structure utilizes the reciprocating vibration of the equalizing partition plate in the vertical direction to play a role of vibrating and crushing the soil in the soil containing shell, and serves as a buffer to avoid the soil in the soil containing shell from splashing.

[0032] Preferably, a sound wave auxiliary vibration mechanism is arranged below the soil containing shell, the sound wave auxiliary vibration mechanism comprises a plurality of sound wave generators fixed to the bottom of the soil containing shell, the sound wave generators are directional sound wave generators, and the emission directions of the sound wave generators are upward.

[0033] It is specified that the sound wave generators are utilized to impact the soil in the soil containing shell, so that the soil is more uniformly dispersed in the soil containing shell, and the situation of local concentration or clumping of the soil is avoided.

[0034] Preferably, the method for washing and eluting the pesticide contaminated soil by using the pesticide contaminated site synergistic washing and elution system comprises the following steps:

[0035] S1, the pesticide contaminated soil is dug out, and the pesticide contaminated soil is dried to make the water content of the pesticide contaminated soil less than 3%;

[0036] S2, the pesticide contaminated soil is classified according to particle size, which is divided into: sand particles 0.5-1.0mm in one size grade; silt particles 0.25-0.50mm, 0.10-0.25mm, 0.05-0.10mm and 0.01-0.05mm in four size grades; clay particles 0.003-0.05mm and 0.001-0.003mm in two size grades; and colloidal particles <0.001mm;

[0037] S3, the single particle size range of pesticide contaminated soil into the soil containing shell, into the aeration delivery pipe 150℃-300℃ hot air, hot air in the aeration delivery pipe into the aeration output pipe inside and from the aeration output pipe top spout, hot air from bottom to top through the pesticide contaminated soil, the pesticide in the pesticide contaminated soil pyrolysis;

[0038] At the same time, hot air from bottom to top through the pesticide contaminated soil to the soil plays a certain stirring effect;

[0039] The hot air pyrolysis treatment of pesticide contaminated soil 60-150 min.

[0040] S4, into the vapor mixing output pipe eluent vapor, eluent vapor from each vapor nozzle spout into the aeration output pipe inside;

[0041] Eluent vapor and hot air into the aeration output pipe mixed from each dispersed exhaust hole exhaust;

[0042] At this time, the butterfly shaped closed valve is in the closed state, the aeration output pipe internal pressure increases, so that the closed cone shell along the axis of the closed cone shell control cylinder moves, and moves away from the closed constraint ring, the closed cone shell inside and the closed constraint ring outside form a gap;

[0043] Hot air and eluent vapor mixture gas from the gap between the closed cone shell inside and the closed constraint ring outside;

[0044] Air flow guide constraint ring inside plays a guiding effect, so that the mixed gas flows along the axis of the air flow guide constraint ring;

[0045] S5, the motor driven stirring shaft rotation, stirring shaft driven by a plurality of stirring rod rotation, using a plurality of stirring rod for soil in the soil containing shell stirring;

[0046] Stirring mechanism support sliding block is driven by servo motor along the stirring mechanism support sliding rail moves, stirring mechanism support sliding block driven longitudinal support plate moves together;

[0047] And the longitudinal support sliding block is driven by servo motor along the longitudinal support sliding rail moves, the longitudinal support sliding block driven stirring mechanism containing shell together with a plurality of stirring rod moves, convenient for the soil in the soil containing shell fully stirring;

[0048] S6, vibration drive rod driven lifting vibration support plate reciprocating vibration in the vertical direction, lifting vibration support plate driven lifting vibration support tube reciprocating vibration in the vertical direction in the partition plate support cylinder, lifting vibration support tube driven balance partition plate reciprocating vibration in the vertical direction;

[0049] The balanced partition plate reciprocates in the vertical direction to vibrate and break the soil in the soil containing shell, and acts as a buffer to prevent the soil in the soil containing shell from splashing;

[0050] S7, the soil in the soil containing shell is impacted by the sound wave generator, so that the soil is more uniformly dispersed in the soil containing shell, and local concentration or clumping of the soil is avoided;

[0051] S8, a small amount of soil inevitably enters the aeration output pipe through the gap, and the soil entering the aeration output pipe is accumulated at the bottom of the aeration output pipe because the butterfly-shaped sealing valve is in a normally closed state;

[0052] The butterfly-shaped sealing valve is opened periodically, so that the soil accumulated at the bottom of the aeration output pipe falls into the bottom of the steam elution support containing shell;

[0053] The cleaning circulating support slider is driven by the servo motor to move along the cleaning circulating support slide rail, the cleaning circulating support slider drives the cleaning scraper to move together, the soil falling into the bottom of the steam elution support containing shell is pushed to the negative pressure instantaneous suction pipe by the cleaning scraper, and the soil is sucked into the negative pressure instantaneous suction pipe under the action of negative pressure and discharged;

[0054] S9, the pesticide-contaminated soil is treated by pyrolysis with hot air for 60-150 min.

[0055] The pesticide residue detection is performed on the pesticide-contaminated soil treated by the above method, and the detection result is almost zero.

[0056] Compared with the prior art, the beneficial effects of the present application are:

[0057] 1. The structure of the present application is reasonable and convenient to operate, the soil is powdered, classified according to the particle size of the soil, and the contaminated soil is eluted and purified by the mixed gas of hot air and eluent vapor in the soil containing shell, which can effectively separate and remove the organic pesticide residues in the contaminated soil;

[0058] 2. The exhaust dispersing mechanism is provided, which can blow the hot air to the contaminated soil more dispersedly, so that the contaminated soil is heated more uniformly, and the contaminated soil and the eluent vapor are also contacted more uniformly and sufficiently, which is beneficial to more effectively remove the organic pesticide residues in the contaminated soil;

[0059] 3. The balanced partition plate reciprocates in the vertical direction to vibrate and break the soil in the soil containing shell, and acts as a buffer to prevent the soil in the soil containing shell from splashing. BRIEF DESCRIPTION OF DRAWINGS

[0060] Figure 1 is the front view of the present application;

[0061] Figure 2 yes Figure 1 The left view;

[0062] Figure 3 This is a schematic diagram of the aeration output pipe in this invention;

[0063] Figure 4 This is a schematic diagram of the exhaust dispersion mechanism in this invention;

[0064] Figure 5 This is a schematic diagram of the cleaning and recycling mechanism in this invention;

[0065] Figure 6 This is a schematic diagram of the structure of the movable stirring mechanism in this invention;

[0066] Figure 7 This is a schematic diagram of the balanced partition structure in this invention.

[0067] In the diagram, 10-accommodation support structure, 11-soil containment shell, 12-overflow protection shell, 17-buffer support structure, 171-buffer support base, 172-buffer support telescopic rod, 20-steam elution mechanism, 21-steam elution support containment shell, 211-fixed mating hole, 22-aeration output pipe, 221-aeration delivery pipe, 222-butterfly-shaped sealing valve, 23-exhaust dispersion mechanism, 231-exhaust dispersion support shell, 232-dispersion exhaust through hole, 233-sealed constraint ring, 234-sealed cone shell, 235-airflow guide constraint ring, 236-sealed cone shell control cylinder, 237-sealed cone shell control column, 238-tension return spring, 24-steam mixing mechanism, 241-steam mixing output pipe, 24 2-Steam nozzle, 25-Cleaning and recycling mechanism, 251-Cleaning and recycling support slide rail, 252-Cleaning and recycling support slider, 253-Cleaning scraper, 254-Negative pressure instantaneous suction pipe, 31-Moving stirring mechanism, 311-Stirring mechanism support slide rail, 312-Stirring mechanism support slider, 313-Longitudinal support plate, 314-Longitudinal support slide rail, 315-Longitudinal support slider, 316-Stirring mechanism housing, 317-Stirring shaft mating hole, 318-Stirring shaft, 319-Stirring rod, 32-Balanced partition structure, 321-Balanced partition plate, 322-Partition plate support cylinder, 323-Lifting and vibrating mating groove, 324-Lifting and vibrating support pipe, 325-Lifting and vibrating support plate, 326-Vibration drive rod. Detailed Implementation

[0068] The following is combined Figures 1-7 The present invention will be described in detail below. For ease of description, the orientations mentioned below are defined as follows: The directions of up, down, left, right, front, and back mentioned below are consistent with the directions of up, down, left, right, front, and back in the projection relationship of the respective main view or structural schematic diagram.

[0069] Embodiment 1:

[0070] A pesticide contaminated site synergistic elution system, as shown in the figure, comprises a containing support structure 10, a vapor elution mechanism 20 arranged in the containing support structure 10; Figure 1

[0071] The containing support structure 10 comprises a soil containing shell 11 with an opening facing upward;

[0072] The top of the soil containing shell 11 is fixedly provided with an annular anti-overflow surrounding shell 12, which is a horn structure with a large upper part and a small lower part.

[0073] The bottom of the soil containing shell 11 is provided with a buffer support structure 17, which comprises a buffer support base 171, and a plurality of buffer support telescopic rods 172 are connected between the top of the buffer support base 171 and the bottom of the soil containing shell 11, the buffer support telescopic rods 172 are hydraulic telescopic rods, the outer rod end of the buffer support telescopic rod 172 is connected to the top of the buffer support base 171 in the form of a spherical hinge, and the inner rod end of the buffer support telescopic rod 172 is connected to the bottom of the soil containing shell 11 in the form of a spherical hinge.

[0074] The vapor elution mechanism 20 comprises a vapor elution support containing shell 21 fixed to the inner bottom of the soil containing shell 11, and the top of the vapor elution support containing shell 21 has a plurality of fixed fitting holes 211 connected to the inside thereof, and a vertical aeration output pipe 22 is fixedly arranged in the fixed fitting hole 211;

[0075] The aeration output pipe 22 is fixedly provided with an aeration delivery pipe 221, and the lower end of the aeration output pipe 22 has a butterfly-shaped airtight valve 222;

[0076] The top of the aeration output pipe 22 is provided with an exhaust gas dispersion mechanism 23, which comprises an exhaust gas dispersion support shell 231 fixed to the top of the aeration output pipe 22, and the exhaust gas dispersion support shell 231 is a conical shell body with a pointed end facing upward, and the side of the exhaust gas dispersion support shell 231 has a plurality of dispersion exhaust through holes 232;

[0077] The outer side of the exhaust gas dispersion support shell 231 is fixedly provided with airtight restraint rings 233 at the dispersion exhaust through holes 232, and the outer side surface of the airtight restraint rings 233 is a conical surface structure, and the outer side of the airtight restraint rings 233 is in contact with airtight conical shells 234;

[0078] The outer periphery of the airtight restraint rings 233 is fixedly provided with airflow guide restraint rings 235, and the inner side of the airflow guide restraint rings 235 is an arc surface structure;

[0079] ​The inside of the exhaust dispersion support shell 231 is fixedly provided with a sealed conical shell control cylinder 236 coaxial with the dispersion exhaust through hole 232, and the end of the sealed conical shell control cylinder 236 close to the dispersion exhaust through hole 232 is an open end. A sealed conical shell control column 237 is slidably arranged in the sealed conical shell control cylinder 236, and the sealed conical shell control column 237 is fixedly connected with the sealed conical shell 234 through a fixed connecting rod.

[0080] The other end of the sealed conical shell control column 237 is fixedly connected with the inner end of the sealed conical shell control cylinder 236, and a stretch return spring 238 is arranged therebetween.

[0081] The vapor mixing mechanism 24 is arranged in the aeration output pipe 22, and the vapor mixing mechanism 24 includes a vapor mixing output pipe 241 fixed in the aeration output pipe 22 and annular. The vapor mixing output pipe 241 has a plurality of vapor nozzles 242 on the upper side and connected with the inside.

[0082] The vapor elution support containing shell 21 is provided with a cleaning circulation recovery mechanism 25, which includes a cleaning circulation support sliding rail 251 fixed on the inner side wall of the vapor elution support containing shell 21. The cleaning circulation support sliding rail 251 is arranged horizontally, and a cleaning circulation support sliding block 252 is slidably arranged on the cleaning circulation support sliding rail 251. The cleaning circulation support sliding block 252 is driven by a servo motor to move along the cleaning circulation support sliding rail 251.

[0083] The cleaning circulation support sliding block 252 is fixedly provided with a cleaning scraper 253, and the vapor elution support containing shell 21 is fixedly provided with a negative pressure instantaneous suction pipe 254 at both ends of the cleaning circulation support sliding rail 251. The side wall of the negative pressure instantaneous suction pipe 254 has a plurality of through holes.

[0084] The top of the soil containing shell 11 is provided with a movable stirring mechanism 31, which includes two stirring mechanism support sliding rails 311 fixed in parallel on the top of the soil containing shell 11. The stirring mechanism support sliding rails 311 are slidably provided with stirring mechanism support sliding blocks 312, and the stirring mechanism support sliding blocks 312 are driven by a servo motor to move along the stirring mechanism support sliding rails 311.

[0085] The two stirring mechanism support sliding blocks 312 are fixedly provided with a longitudinal support plate 313, and the extension direction of the longitudinal support plate 313 is perpendicular to the extension direction of the stirring mechanism support sliding rails 311.

[0086] The lower side of the longitudinal support plate 313 is fixed with a longitudinal support slide rail 314, and the longitudinal support slide rail 314 is slidably connected with a longitudinal support slide block 315. The longitudinal support slide block 315 is driven by a servo motor to move along the longitudinal support slide rail 314. The lower end of the longitudinal support slide block 315 is fixed with a stirring mechanism containing shell 316. The bottom of the stirring mechanism containing shell 316 has a stirring shaft matching hole 317 communicated with the inside. A vertical stirring shaft 318 is rotatably arranged in the stirring shaft matching hole 317. A plurality of vertical stirring rods 319 are fixedly connected to the lower end of the stirring shaft 318. An electric motor is fixedly arranged in the stirring mechanism containing shell 316 to drive the stirring shaft 318 to rotate.

[0087] The soil containing shell 11 is provided with an equalizing and separating structure 32. The equalizing and separating structure 32 includes an equalizing and separating plate 321 arranged in the soil containing shell 11 and horizontally arranged. The inner side wall of the soil containing shell 11 is fixedly provided with a cylindrical and hollow separating plate support cylinder 322. The side of the separating plate support cylinder 322 has an inner and outer through and vertically extending lifting and vibrating matching groove 323. A vertically through lifting and vibrating support pipe 324 is slidably arranged in the separating plate support cylinder 322. The lifting and vibrating support pipe 324 is fixedly connected with the equalizing and separating plate 321 through a fixed connecting plate.

[0088] The lifting and vibrating support pipe 324 is fixedly provided with a lifting and vibrating support plate 325. The lifting and vibrating support plate 325 is provided with a vibrating drive rod 326 on the upper and lower sides. The vibrating drive rod 326 is an electromagnetic vibrating drive rod. The outer rod end of the vibrating drive rod 326 is connected with the inner end of the separating plate support cylinder 322 in the form of a spherical hinge. The inner rod end of the vibrating drive rod 326 is connected with the lifting and vibrating support plate 325 in the form of a spherical hinge.

[0089] The equalizing and separating plate 321 is provided with a plurality of vertically through holes.

[0090] The soil containing shell 11 is provided with a sound wave auxiliary vibration mechanism 50. The sound wave auxiliary vibration mechanism 50 includes a plurality of sound wave generators 51 fixed on the bottom of the soil containing shell 11. The sound wave generator 51 is a directional sound wave generator. The emission direction of the sound wave generator 51 is upward.

[0091] Embodiment 2:

[0092] The method for washing and eluting pesticide contaminated soil by using the pesticide contaminated site synergistic elution system as described in embodiment 1 comprises the following steps:

[0093] S1, the pesticide contaminated soil is dug out, and the pesticide contaminated soil is dried to make the water content of the pesticide contaminated soil less than 3%;

[0094] S2, the pesticide contaminated soil is classified according to particle size, which is divided into: sand particles 0.5-1.0mm a diameter level; silt particles 0.25-0.50mm, 0.10-0.25mm, 0.05-0.10mm, 0.01-0.05mm four diameter levels; clay particles 0.003-0.05mm, 0.001-0.003mm two diameter levels; colloidal particles <0.001mm;

[0095] S3, the pesticide contaminated soil in a single particle size range is put into the soil containing shell 11, hot air at 300 DEG C is introduced into the aeration delivery pipe 221, the hot air in the aeration delivery pipe 221 enters the inside of the aeration output pipe 22 and is sprayed from the top of the aeration output pipe 22, the hot air passes through the pesticide contaminated soil from bottom to top, and the pesticide in the pesticide contaminated soil is pyrolyzed;

[0096] Meanwhile, the hot air passing through the pesticide contaminated soil from bottom to top plays a certain stirring effect on the soil;

[0097] The pesticide contaminated soil is pyrolyzed by the hot air for 60 minutes.

[0098] S4, the eluent vapor is introduced into the vapor mixing output pipe 241, and the eluent vapor is sprayed from each vapor nozzle 242 into the inside of the aeration output pipe 22;

[0099] The eluent vapor mixes with the hot air in the inside of the aeration output pipe 22 and is discharged from each dispersed air exhaust hole 232;

[0100] At this time, the butterfly-shaped sealing valve 222 is in a closed state, and after the air pressure in the inside of the aeration output pipe 22 increases, the sealing cone shell 234 moves along the axis of the sealing cone shell control cylinder 236 and moves away from the sealing constraint ring 233, and the gap between the inner side of the sealing cone shell 234 and the outer side of the sealing constraint ring 233 is formed;

[0101] The mixed gas of the hot air and the eluent vapor is discharged from the gap between the inner side of the sealing cone shell 234 and the outer side of the sealing constraint ring 233;

[0102] The inner side of the airflow guide constraint ring 235 plays a flow guiding role, so that the mixed gas flows along the axis of the airflow guide constraint ring 235;

[0103] S5, the motor is used to drive the stirring shaft 318 to rotate, the stirring shaft 318 drives the plurality of stirring rods 319 to rotate, and the plurality of stirring rods 319 are used to stir the soil in the soil containing shell 11;

[0104] The stirring mechanism support sliding block 312 is driven by the servo motor to move along the stirring mechanism support sliding rail 311, and the stirring mechanism support sliding block 312 drives the longitudinal support plate 313 to move together;

[0105] And the longitudinal support slider 315 is driven by a servo motor to move along the longitudinal support slide rail 314, the longitudinal support slider 315 drives the stirring mechanism containing shell 316 to move together with the plurality of stirring rods 319, which facilitates the full stirring of the soil in the soil containing shell 11;

[0106] S6, the vibration driving rod 326 drives the lifting vibration support plate 325 to reciprocate vertically, the lifting vibration support plate 325 drives the lifting vibration support pipe 324 to reciprocate vertically in the partition plate support cylinder 322, and the lifting vibration support pipe 324 drives the balanced partition plate 321 to reciprocate vertically;

[0107] The balanced partition plate 321 reciprocates vertically, which plays a role in vibrating and crushing the soil in the soil containing shell 11, and also serves as a buffer to prevent the soil in the soil containing shell 11 from splashing;

[0108] S7, use the sound wave generator 51 to impact the soil in the soil containing shell 11, so that the soil is more evenly dispersed in the soil containing shell 11, avoiding the situation of local concentration or clumping of the soil;

[0109] S8, it is inevitable that a small amount of soil enters the inside of the aeration output pipe 22 through the gap, and the soil entering the inside of the aeration output pipe 22 will accumulate at the bottom of the aeration output pipe 22 because the butterfly-shaped sealing valve 222 is in a normally closed state;

[0110] Periodically open the butterfly-shaped sealing valve 222 to make the soil accumulated at the bottom of the aeration output pipe 22 fall into the bottom of the steam elution support containing shell 21;

[0111] The cleaning circulating support slider 252 is driven by a servo motor to move along the cleaning circulating support slide rail 251, and the cleaning circulating support slider 252 drives the cleaning scraper 253 to move together, which pushes the soil falling into the bottom of the steam elution support containing shell 21 to the negative pressure instantaneous suction pipe 254, and under the action of negative pressure, the soil is sucked into the negative pressure instantaneous suction pipe 254 and discharged;

[0112] S9, use hot air to pyrolyze the pesticide-contaminated soil for 60 minutes.

[0113] The pesticide residue detection of the pesticide-contaminated soil treated by the above method shows that the detection value is almost zero.

[0114] Example 3:

[0115] The difference between example 2 and example 3 is that in step S3, a single particle size range of pesticide-contaminated soil is put into the soil containing shell 11, and 150℃ hot air is introduced into the aeration conveying pipe 221;

[0116] The pyrolysis treatment of the pesticide-contaminated soil by hot air can be completed in 150 minutes.

[0117] Example 4

[0118] Different from example 2, in step S3, the pesticide-contaminated soil with a single particle size range is put into the soil containing shell 11, and hot air at 230 DEG C is introduced into the aeration delivery pipe 221;

[0119] The pyrolysis treatment of the pesticide-contaminated soil by hot air can be completed in 120 minutes.

[0120] In the practical application process of the present application, the waste gas recovery pipe is arranged above the soil containing shell 11, the generated waste gas is drawn away through the waste gas recovery pipe under the action of negative pressure, and the waste gas is subjected to harmless purification treatment.

Claims

1. A system for enhanced elution of a pesticide-contaminated site, comprising: Including containing support structure (10), vapor elution mechanism (20) arranged in the containing support structure (10); The containing support structure (10) comprises a soil containing shell (11) with an upward opening; The vapor elution mechanism (20) comprises a vapor elution support containing shell (21) fixed at the bottom of the soil containing shell (11), and the top of the vapor elution support containing shell (21) has a plurality of fixed fitting holes (211) in communication with the inside thereof, and a vertical aeration output pipe (22) is fixedly arranged in the fixed fitting hole (211); The aeration output pipe (22) is fixedly provided with an aeration delivery pipe (221), and the lower end of the aeration output pipe (22) is provided with a butterfly-shaped airtight valve (222); The aeration output pipe (22) is provided with an exhaust gas dispersion mechanism (23) at the top, the exhaust gas dispersion mechanism (23) comprises an exhaust gas dispersion support shell (231) fixed at the top of the aeration output pipe (22), the exhaust gas dispersion support shell (231) is a conical shell with a pointed end upward, and the side of the exhaust gas dispersion support shell (231) has a plurality of dispersion exhaust through holes (232) penetrating in and out; The exhaust gas dispersion support shell (231) is fixedly provided with airtight restraint ring (233) at the dispersion exhaust through hole (232) on the outer side, the outer side of the airtight restraint ring (233) is a conical surface structure, and the outer side of the airtight restraint ring (233) is in contact with the airtight conical shell (234); The airtight restraint ring (233) is fixedly provided with an airflow guide restraint ring (235) on the periphery, and the inner side of the airflow guide restraint ring (235) is an arc surface structure; The exhaust gas dispersion support shell (231) is fixedly provided with an airtight conical shell control cylinder (236) on the inner side, the airtight conical shell control cylinder (236) is coaxial with the dispersion exhaust through hole (232), one end of the airtight conical shell control cylinder (236) close to the dispersion exhaust through hole (232) is an open end, and the airtight conical shell control cylinder (236) is slidably connected with an airtight conical shell control column (237), and the airtight conical shell control column (237) is fixedly connected with the airtight conical shell (234) through a fixed connecting rod; The other end of the airtight conical shell control column (237) and the inner end of the airtight conical shell control cylinder (236) are fixedly connected with a stretching reset spring (238); The aeration output pipe (22) is provided with a vapor mixing mechanism (24), and the vapor mixing mechanism (24) comprises a vapor mixing output pipe (241) fixed in the aeration output pipe (22) and being annular, and the upper side of the vapor mixing output pipe (241) has a plurality of vapor nozzles (242) in communication with the inside thereof.

2. A system for enhanced washing and removal of pesticide contamination from a site according to claim 1, wherein: The top of the soil containing shell (11) is fixedly provided with an annular anti-overflow surrounding shell (12), and the anti-overflow surrounding shell (12) is a horn structure with a large upper side and a small lower side.

3. The enhanced wash system of a pesticide contaminated site according to claim 1, wherein: The bottom of the soil containing shell (11) is provided with a buffer support structure (17), the buffer support structure (17) comprises a buffer support base (171), the top of the buffer support base (171) and the bottom of the soil containing shell (11) are connected by a plurality of buffer support telescopic rods (172), the buffer support telescopic rod (172) is a hydraulic telescopic rod, the outer rod end of the buffer support telescopic rod (172) is connected with the top of the buffer support base (171) in the form of a spherical hinge, and the inner rod end of the buffer support telescopic rod (172) is connected with the bottom of the soil containing shell (11) in the form of a spherical hinge.

4. The enhanced wash system of a pesticide contaminated site according to claim 1, wherein: The vapor elution support containing shell (21) is provided with a cleaning circulating recovery mechanism (25) inside, the cleaning circulating recovery mechanism (25) comprises a cleaning circulating support sliding rail (251) fixed on the inner side wall of the vapor elution support containing shell (21), the cleaning circulating support sliding rail (251) is arranged horizontally, and a cleaning circulating support sliding block (252) is slidably arranged on the cleaning circulating support sliding rail (251) and driven by a servo motor to move along the cleaning circulating support sliding rail (251); The cleaning circulating support sliding block (252) is fixedly provided with a cleaning scraper (253), and the vapor elution support containing shell (21) is fixedly provided with a negative pressure instantaneous suction pipe (254) at both ends of the cleaning circulating support sliding rail (251) inside, and the side wall of the negative pressure instantaneous suction pipe (254) has a plurality of through holes penetrating in and out.

5. The enhanced wash system of a pesticide contaminated site according to claim 1, wherein: The top of the soil containing shell (11) is provided with a movable stirring mechanism (31), the movable stirring mechanism (31) comprises two parallel stirring mechanism support sliding rails (311) fixed on the top of the soil containing shell (11), a stirring mechanism support sliding block (312) is slidably arranged on the stirring mechanism support sliding rail (311) and driven by a servo motor to move along the stirring mechanism support sliding rail (311); Two stirring mechanism support sliding blocks (312) are fixedly provided with a longitudinal support plate (313) in common, and the extension direction of the longitudinal support plate (313) is perpendicular to the extension direction of the stirring mechanism support sliding rail (311); The lower side of the longitudinal support plate (313) is fixedly provided with a longitudinal support sliding rail (314), the longitudinal support sliding rail (314) is slidably provided with a longitudinal support sliding block (315), the longitudinal support sliding block (315) is driven by a servo motor to move along the longitudinal support sliding rail (314), the lower end of the longitudinal support sliding block (315) is fixedly provided with a stirring mechanism containing shell (316), the bottom of the stirring mechanism containing shell (316) has a stirring rotating shaft matching hole (317) communicated with the inside thereof, a vertically extending stirring rotating shaft (318) is rotatably provided in the stirring rotating shaft matching hole (317), a plurality of vertically extending stirring rods (319) are fixedly connected to the lower end of the stirring rotating shaft (318), and a motor for driving the stirring rotating shaft (318) to rotate is fixedly arranged in the stirring mechanism containing shell (316).

6. The enhanced wash system of a pesticide contaminated site according to claim 1, wherein: The soil containing shell (11) is provided with an equalizing and separating structure (32), the equalizing and separating structure (32) comprises an equalizing and separating plate (321) arranged in the soil containing shell (11) and horizontally arranged, a cylindrical and hollow separating plate supporting cylinder (322) is fixedly arranged on the inner side wall of the soil containing shell (11), the side surface of the separating plate supporting cylinder (322) has an inner and outer through and vertically extending lifting and vibrating matching groove (323), a vertically through lifting and vibrating supporting pipe (324) is slidably arranged in the separating plate supporting cylinder (322), and the lifting and vibrating supporting pipe (324) is fixedly connected with the equalizing and separating plate (321) through a fixed connecting plate; The lifting and vibrating supporting pipe (324) is fixedly provided with a lifting and vibrating supporting plate (325), the lifting and vibrating supporting plate (325) is provided with a vibrating driving rod (326) on the upper side and the lower side, the vibrating driving rod (326) is an electromagnetic vibrating driving rod, the outer rod end of the vibrating driving rod (326) is connected with the inner end of the separating plate supporting cylinder (322) in the form of a spherical hinge, and the inner rod end of the vibrating driving rod (326) is connected with the lifting and vibrating supporting plate (325) in the form of a spherical hinge; The equalizing and separating plate (321) is provided with a plurality of vertically through through holes.

7. The enhanced wash system of a pesticide contaminated site according to claim 1, wherein: The soil containing shell (11) is provided with a sound wave auxiliary vibration mechanism (50) below, the sound wave auxiliary vibration mechanism (50) comprises a plurality of sound wave generators (51) fixed on the bottom of the soil containing shell (11), the sound wave generators (51) are directional sound wave generators, and the emission direction of the sound wave generators (51) is upward.

8. The method for elution of pesticide contaminated soil by the pesticide contaminated site synergistic elution system according to any one of claims 1-7, characterized in that, The method comprises the following steps: S1, the pesticide contaminated soil is dug out, and the pesticide contaminated soil is dried, so that the water content of the pesticide contaminated soil is less than 3%; S2, the pesticide-contaminated soil is classified according to particle size, and is divided into: sand particles 0.5~1.0mm a diameter level; silt particles 0.25~0.50mm, 0.10~0.25mm, 0.05~0.10mm, 0.01~0.05mm four diameter levels; clay particles 0.003~0.05mm, 0.001~0.003mm two diameter levels; colloidal particles <0.001mm; S3, the pesticide-contaminated soil in a single particle size range is put into the soil containing shell (11), hot air at 150℃~300℃ is introduced into the aeration delivery pipe (221), the hot air in the aeration delivery pipe (221) enters the inside of the aeration output pipe (22) and is sprayed from the top of the aeration output pipe (22), the hot air passes through the pesticide-contaminated soil from bottom to top, and the pesticide-contaminated soil is pyrolyzed; Meanwhile, the hot air passing through the pesticide-contaminated soil from bottom to top plays a certain stirring effect on the soil; The pyrolysis treatment of the pesticide-contaminated soil by the hot air is 60~150min.

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