JP2022140189A - Integrated system for organochlorine pesticide-contaminated soil remediation and exhaust gas treatment - Google Patents

Abstract

To provide an integrated system that can decompose pesticide residues in the soil and can, at the same time, treat the decomposed exhaust gas.SOLUTION: A systems has a support structure 10 for a material transport belt 211 at the bottom of an internal cavity. Over the material transport belt 211, provided are, in order along the material transport direction, a material distribution pipe 22, a pavement baffle 24, an agent spray plate 31, a partition plate 121, a UV catalyzer 34, a catalyst condenser 32, an exhaust gas treatment mechanism 50 for treating exhaust gas, and an exhaust gas filter. The system can treat pesticide residues and the decomposed exhaust gas at the same time.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to the technical field of contaminated soil remediation, and more particularly to an integrated device for remediation of organochlorine pesticide-contaminated soil and exhaust gas treatment.

Large amounts of pesticides are used in agricultural production, and because they accumulate in soil media and are difficult to biodegrade, they exist for a long time and become a continuous source of pollution. With the current soil remediation technology, it is not possible to combine the two functions of decomposing residual pesticides and simultaneously treating the decomposed exhaust gas. there is

To achieve the above objects, the present invention provides an integrated apparatus for remediation of organochlorine pesticide-contaminated soil and exhaust gas treatment, which effectively decomposes residual pesticides in the soil, and at the same time generates exhaust gas. The gas is collected and processed, and the specific technical solutions are as follows:
An integrated apparatus for remediation of organochlorine pesticide-contaminated soil and exhaust gas treatment designed according to the present invention includes a support structure composed of a support bottom plate and a sealing shell provided thereon, wherein the support A material conveying belt is provided at the bottom of the inner cavity of the structure, and above the material conveying belt, along the material conveying direction, a material distribution pipe, a paving baffle, a chemical spray plate with nozzles, a partition plate, an ultraviolet catalyzer, and a catalyst. A collector and an exhaust gas recovery mechanism are provided.
A discharge baffle is provided at the transport end of the material transport belt in close contact with the transport surface, and the discharge baffle communicates with the outside through a discharge port provided on the sealing shell.
The feeding end of the material distribution pipe passes through the sealing shell to communicate with the outside, and the discharge end of the material distribution pipe is provided with a distribution hopper with a distribution vibrator. A distribution vibrator causes contaminated soil to more evenly fall from the distribution hopper onto the material transport belt.
The pavement baffle is connected to a sliding support rod provided on the inner wall of the sealing shell through an elevating slide block, and is vertically movable along the sliding support rod. By adjusting the height of the paving baffle, the thickness of contaminated soil placed on the material transport belt can be adjusted.
Inside the catalyst collector, from top to bottom, a light guide fiber passing through the top of the catalyst collector, an optical fiber bundle plate, a light guide tube and a light outlet with a collector mirror are provided.
One end of the light guide fiber remote from the catalyst collector is connected to a light collection mechanism provided on the outer wall of the top of the sealing shell.
The exhaust gas recovery mechanism includes a recovery shell, an air inlet is opened at the bottom of the recovery shell, an exhaust fan is provided inside, and an exhaust hole is opened at the top, and the exhaust hole is connected through an exhaust communication pipe. It is connected to an exhaust gas treatment mechanism provided on the top outer wall of the sealing shell.
As one aspect of the present invention, an ultraviolet ray outlet with an ultraviolet ray generator, a group of light guide lenses, and an ultraviolet ray collecting mirror are provided in order from top to bottom inside the ultraviolet catalyzer. The catalytic concentrator is
Sunlight is used to focus a beam of higher energy density to irradiate the contaminated soil, and pesticide residues are catalytically destroyed under conditions of high temperature and ultraviolet light.

In one aspect of the present invention, the light collection mechanism includes a light collection tube base provided on the top outer wall of the sealing shell, and a light collection tube rotatably connected to the light collection tube base, The top of the tube is connected to the condensing lens through a condensing support ring, the internal cavity of the condensing tube is provided with a condensing tube connected to the light guide fiber, the top of the condensing tube is connected to the condensing lens. match the focal point.
As one aspect of the present invention, the exhaust gas treatment mechanism includes an exhaust gas filtering shell, one end of the internal cavity of the exhaust gas filtering shell is connected to the exhaust communication pipe, and the other end is sequentially connected along the air flow direction. A plurality of layers of filter plates perpendicular to the airflow circulation direction and a plurality of exhaust pipes parallel to the airflow circulation direction and penetrating the exhaust gas filtering shell are provided.

In one aspect of the present invention, the internal cavity of the exhaust gas filtering shell is provided with a cleaning slide rail and a ball screw parallel to each other in a direction parallel to the filter plate, the ball screw being slidable with the cleaning slide rail. A cleaning slide block is provided connected to the cleaning slide block, on which a filter plate cleaner with a cleaning brush is connected. To prevent clogging of a filter plate by timely cleaning dust accumulated on the filter plate with a filter plate cleaner.

In one aspect of the invention, the integrated device further includes an exhaust gas filter having an outer cylinder and an inner cylinder arranged coaxially.
The side wall of the outer cylinder is provided with an exhaust port, a water outlet and a water supply pipe in order from top to bottom; communicates with the exhaust pipe, the other end communicates with the bottom end of the side wall of the inner cylinder, and a rotating support ring is provided on the top of the inner cavity of the vent shell.
The inner cavity of the inner cylinder is provided with a submerged water supply pipe with a water outlet slot extending axially through the top of the outer cylinder and circumferentially spaced in the side wall of the inner cylinder with water passage holes and A vent pipe with a vent hole is provided, an inner cylinder support ring is provided on the outer edge of the bottom of the inner cylinder and is in close contact with the rotation support ring, and the central axis of the bottom of the inner cylinder is sequentially connected to the first driven gear and the first gear. is connected to the first motor through the main drive gear of the The first motor rotates the inner cylinder to agitate the exhaust gas and the exhaust gas treatment liquid, increase the contact area, and accelerate the reaction process.
The notch angle between the water passage hole and the side wall of the inner cylinder, the notch angle between the vent pipe and the side wall of the inner cylinder, and the notch angle between the water supply pipe and the side wall of the outer cylinder are all of the same size and in the same direction. The force generated by the entry of the fluid into the water supply pipe rotates the inner cylinder to perform agitation, and at the same time, the operating force of the first motor is shared to achieve energy saving.

As one aspect of the present invention, the preparation material of the material conveying belt is CrMoV or WCrMoNb high temperature resistant metal, and the surface of the material conveying belt is plated with a TiO coating layer to prevent damage to the material conveying belt at high temperature. , promoting the photocatalytic reaction.
As an aspect of the present invention, the transport speed range of said material transport belt is 40-80 m/h.
The working speed of the material conveying belt is kept within a reasonable range, so as not only to ensure the treatment effect, but also to avoid wasting energy.

As an aspect of the present invention, the UV light generated by the UV generator is 260-380
It has a wavelength range of nm. Ultraviolet catalysis provides the best treatment efficiency in a reasonable wavelength range.

Compared with existing soil remediation devices, the present invention has the following beneficial effects.
The present invention not only uses an ultraviolet ray catalyst to catalytically decompose pesticide residues in contaminated soil, but also uses focused sunlight from a catalyst collector to irradiate the contaminated soil to promote the catalytic decomposition, and It treats exhaust gas generated by decomposition into gas that meets emission standards, and has high application value.

1 is a front view of the present invention; FIG. 2 is a top view of FIG. 1; FIG. 1 is a front view of an exhaust gas filter of the present invention; FIG. 4 is a top view of FIG. 3; FIG. FIG. 2 is a partial view of part A in FIG. 1;

[Description of symbols]
10 Support Mechanism 11 Support Bottom Plate 12 Sealing Shell 121 Partition Plate 122 Discharge Port 13 Sliding Support Rod 131 Elevating Slide Block 14 Discharge Baffle 21 Material Transport Belt 22 Material Distribution Pipe 23 Distribution Hopper 231 Distribution Vibrator 24 Pavement Baffle 31 Chemical Spray Plate 311 Nozzle 32 Catalyst collector 321 Light outlet 322 Optical fiber bundle plate 323 Light guide tube 324 Condensing mirror 33 Condensing mechanism 331 Condensing tube 332 Condensing support ring 333 Condensing lens 334 Condensing tube 335 Light guiding fiber 336 Condensing Tube base 34 UV catalyst 341 UV outlet 342 UV collector mirror 343 UV generator 344 Light guide lens group 40 Exhaust gas recovery mechanism 41 Exhaust gas recovery shell 411 Air inlet 42 Exhaust fan 43 Exhaust hole 44 Exhaust communication pipe 50 Exhaust gas treatment Mechanism 501 Exhaust gas collection pipe 51 Exhaust gas filter shell 511 Filter plate 512 Exhaust pipe 513 Cleaning slide rail 514 Cleaning slide block 52 Filter plate cleaner 521 Cleaning brush 53 Lifting motor 531 Ball screw 60 Exhaust gas filter 61 Outer cylinder 62 Ventilation shell 621 Rotation Support ring 63 Inner cylinder 631 Inner cylinder support ring 632 Water passage hole 633 Ventilation pipe 6331 Ventilation hole 634 First driven gear 635 First motor 636 First main driving gear 64 Water supply pipe 65 Submerged water supply pipe 651 Drain slot 66 Water Exit 67 exhaust port

To further describe the methods and effects achieved by the present invention, the technical solutions of the present invention are clearly and completely described below in conjunction with the accompanying drawings.

Example 1
Example 1 is intended to describe the specific structure of the device of the present invention, and its content is as follows.
1 and 2, the integrated device for remediation of organochlorine pesticide-contaminated soil and exhaust gas treatment designed according to the present invention comprises a supporting bottom plate 11 and a sealing shell 1 provided thereon.
2, a material transport belt 211 is provided at the bottom of the inner cavity of said support structure 10, and material is sequentially placed above said material transport belt 211 along the material transport direction. Distribution pipe 22, paving baffle 24, chemical spray plate 31 with nozzle 311, partition plate 121, ultraviolet catalyst 34, catalyst collector 32 and exhaust gas recovery mechanism 4
0 is provided.
A discharge baffle 14 is provided at the transport end of the material transport belt 211 to be in close contact with the transport surface, and the discharge baffle 14 passes through a discharge port 122 provided on the sealing shell 12 to communicate with the outside.
The feeding end of the material distribution pipe 22 passes through the sealing shell 12 to communicate with the outside, and the material distribution pipe 22
A distribution hopper 23 with a distribution vibrator 231 is provided at the discharge end of the. With a distribution vibrator,
Contaminated soil from the distribution hopper falls more evenly onto the material transport belt.
The pavement baffle 24 is connected to a sliding support rod 13 provided on the inner wall of the sealing shell 12 via an elevating slide block 131 and is vertically movable along the sliding support rod 13 . By adjusting the height of the paving baffle, the thickness of contaminated soil placed on the material transport belt can be adjusted.
Inside the catalyst collector 32, from top to bottom, a light guide fiber 335 penetrating the top of the catalyst collector 32, an optical fiber bundle plate 322, a light guide cylinder 323, and a light extraction port 321 with a collector mirror 324 are arranged in order. is provided.
One end of the light guide fiber 335 remote from the catalyst collector 32 is connected to a light collecting mechanism 33 provided on the outer wall of the top of the sealing shell 12 .
The exhaust gas recovery mechanism 40 includes a recovery shell 41, an air inlet 411 is opened at the bottom of the recovery shell 41, an exhaust fan 42 is provided inside, and an exhaust hole 43 is opened at the top,
The exhaust hole 43 is connected through an exhaust communication pipe 44 to an exhaust gas processing mechanism 50 provided on the top outer wall of the sealing shell 12 .
Specifically, inside the ultraviolet catalyzer 34, an ultraviolet generator 343, a light guide lens group 344, and an ultraviolet outlet 343 with an ultraviolet collector mirror 342 are provided in this order from top to bottom. Catalytic concentrators use sunlight to focus a beam of higher energy density to irradiate contaminated soil, and pesticide residues are catalytically destroyed under conditions of high temperature and ultraviolet light.
Specifically, the light collecting mechanism 33 is provided on the outer wall of the top portion of the sealing shell 12 .
36, and a light collecting tube 331 rotatably connected to the light collecting tube base 336, the top of the light collecting tube 331 is connected to a light collecting lens 333 through a light collecting support ring 332, and the light collecting tube The inner cavity of 331 is provided with a collecting tube 334 connected to a light guiding fiber 335 , the top of said collecting tube 334 coincides with the focus of the collecting lens 333 .
Specifically, the exhaust gas treatment mechanism 50 includes an exhaust gas filter shell 51, one end of the internal cavity of the exhaust gas filter shell 51 is connected to the exhaust communication pipe 44, and the other end is along the airflow flow direction, A plurality of layers of filter plates 511 that are perpendicular to the airflow circulation direction and a plurality of exhaust pipes 512 that are parallel to the airflow circulation direction and pass through the exhaust gas filtering shell 51 are provided in sequence.
Specifically, a cleaning slide rail 513 and a ball screw 531 parallel to each other are installed in the inner cavity of the exhaust gas filtering shell 51 in a direction parallel to the filter plate 511 , and the cleaning slide rail 513 and the ball screw 531 are installed on the ball screw 531 . A slidably connected cleaning slide block 514 is provided on which the filter plate cleaner 52 with a cleaning brush 521 is connected. A filter plate cleaner 52 cleans the dust collected on the filter plate 511 in a timely manner to prevent clogging of the filter plate 511.例文帳に追加
Specifically, the integrated device further includes an exhaust gas filter 60 having an outer cylinder 61 and an inner cylinder 63 coaxially arranged.
The side wall of the outer cylinder 61 is provided with an exhaust port 67, a water outlet 66 and a water supply pipe 64 in this order from top to bottom. One end of the outer cavity of the shell 62 communicates with the exhaust pipe 512 , the other end communicates with the bottom end of the side wall of the inner cylinder 63 , and a rotating support ring 621 is provided on the top of the inner cavity of the ventilation shell 62 .
A submerged water supply pipe 65 with a water outlet slot 651 is provided in the inner cavity of the inner cylinder 63 along the axis through the top of the outer cylinder 61 and spaced circumferentially along the side wall of the inner cylinder 63 . A vent pipe 633 with a water passage hole 632 and a vent hole 6331 is provided at the bottom of the inner cylinder 63 , and an inner cylinder support ring 631 is provided on the outer edge of the bottom of the inner cylinder 63 to closely contact the rotation support ring 621 . The central shaft is connected to a first motor 635 through a first driven gear 634 and a first main driving gear 636 in turn. The first motor rotates the inner cylinder to agitate the exhaust gas and the exhaust gas treatment liquid, increase the contact area, and accelerate the reaction process.
The notch angle between the water flow hole 632 and the side wall of the inner cylinder 63, the notch angle between the vent pipe 633 and the side wall of the inner cylinder 63, and the notch angle between the water supply pipe 64 and the side wall of the outer cylinder 61 are all of the same size and in the same direction. is.
The force generated by the entry of the fluid into the water supply pipe 64 rotates the inner cylinder 63 for agitation, and at the same time, the operating force of the first motor 635 is shared to achieve energy saving.

Example 2
Example 2 is the same as Example 1 except for the following:
The preparation material of said material conveying belt 211 is 12CrMoV high temperature resistant metal, and the conveying speed range is 40m/h.
The UV light generated by the UV generator 343 has a wavelength of 260 nm.

Example 3
Example 3 is the same as Example 1 except for the following:
The preparation material of said material conveying belt 211 is W18CrMoNb high temperature resistant metal, and the conveying speed range is 80m/h.
The UV light generated by the UV generator 343 has a wavelength of 380 nm.

APPLICATION EXAMPLE This application example is explained based on the contents described in Example 1, and aims to clarify the specific working process of the present invention.
In the actual application process of the present invention, the contaminated soil is first dried and pulverized. As shown in FIG. 1, pretreated contaminated soil is introduced from the material distribution pipe 22, the contaminated soil in the material distribution pipe 22 falls into the distribution hopper 23, and the contaminated soil in the distribution hopper 23 is uniformly dispersed as material. transport belt 2
11, a material transport belt 211 transports contaminated soil from left to right, paving baffle 2
4 flattens the contaminated soil on the material transport belt 211 to make the thickness uniform, sprays the chemical from the nozzle 311 on the chemical spray plate 31, and the chemical is uniformly sprayed on the contaminated soil on the material transport belt 211, The ultraviolet rays of the ultraviolet catalyst 34 are emitted from the ultraviolet outlet 341 to irradiate the contaminated soil, and the ultraviolet rays catalytically decompose residual pesticides in the contaminated soil.
Sunlight irradiates the condensing lens 333 , the condensing lens 333 condenses the sunlight into the condensing tube 334 , and the condensed sunlight passes through the optical fiber bundle plate 32 through the light guide fiber 335 .
2, and then transmitted to the collecting mirror 324 via the light guide tube 323, and then to the collecting mirror 32
Due to the light condensing action of 4, the polluted soil is irradiated with the light emitted from the light outlet 321 to further remove residual pesticides in the polluted soil.
The material transport belt 211 transports the contaminated soil, which is finally discharged from the discharge port 122 and collected, and the part of the soil remaining on the material transport belt 211 is scraped off by the upper edge of the discharge baffle 14. be taken.
Exhaust gas and dust generated when treating pesticide residues in contaminated soil are removed by the exhaust fan 42
After the exhaust gas enters the exhaust gas recovery shell 41 through the air inlet 411, the exhaust gas is discharged from the exhaust hole 43, and the exhaust gas discharged from the exhaust hole 43 passes through the exhaust communicating pipe 44 to enter the exhaust gas collection pipe 501, and the exhaust gas in the exhaust gas collection pipe 501 enters the exhaust gas filter shell 51, and the filtration adsorption action of the filter plate 511 removes dust and particles in the exhaust gas. The exhaust gas that has been filtered by the filter plate 511 is discharged from the exhaust pipe 512 and then further treated by the exhaust gas filter 60 .
As shown in FIG. 3, the exhaust gas discharged from the exhaust pipe 512 enters the ventilation shell 62, the exhaust gas in the ventilation shell 62 enters the inner cylinder 63, and the exhaust gas in the inner cylinder 63 flows into the ventilation pipe. 6
33 through a vent 6331.
The exhaust gas treatment liquid is introduced into the water supply pipe 64, the exhaust gas treatment liquid is also introduced into the subsidence water supply pipe 65,
The exhaust gas treatment liquid in the subsidence water supply pipe 65 is discharged from the water discharge slot 651, and the exhaust gas treatment liquid discharged from the water discharge slot 651 passes through the water passage hole 632, as shown in FIG. When the exhaust gas treatment liquid is discharged from 632, an action force is applied to the inner cylinder 63, causing the inner cylinder 63 to rotate.
The exhaust gas discharged from the vent hole 6331 and the exhaust gas treatment liquid introduced into the water supply pipe 64 and subsidence water supply pipe 65 sufficiently contact and react, and the treated exhaust gas is discharged from the exhaust port 67 and used. The spent exhaust gas treatment liquid is discharged from the water outlet 66 and is centrally treated for reuse.

EXPERIMENTAL EXAMPLE This experimental example is described on the basis of the apparatus described in Example 1 above and the method described in the Application Example above, and is intended to clarify the expression of the invention in practical application.
In this experimental example, the experimental site is chosen as the experimental field of Nanjing Agricultural University, choosing a clean plot without crops, choosing a loamy soil with a medium sand-to-clay ratio, good permeability and good cultivability. Take soil from a tillage layer 0-20 cm deep, air dry, pass through a 2 mm sieve, mix well and set aside. The main physical and chemical properties of this experimental soil are shown in Table 1.
Table 1 Main physical and chemical properties of experimental soil

本実験例では、純度９９．８％のトリアジメフォン（ＴＤＦ）をターゲット汚染物として
選択し、使用したＴＤＦはＡｌａｄｄｉｎ ＰｈａｒｍａｃｅｕｔｉｃａｌＣｏｍｐａｎ
ｙから購入した。
本実験例では、アナターゼ型二酸化チタンベースの複合材料≧９８％のナノＴｉＯ_２を触
媒として選択し、使用するナノＴｉＯ_２はＳｈｅｎｚｈｅｎ Ｃｈｅｎｇｙｉｎ Ｈｉｇ
ｈ-ｔｅｃｈ Ｃｏ．,Ｌｔｄから購入した。このナノＴｉＯ_２を原料として２００μｍｏ
ｌ／ＬのＴｉＯ_２標準原液を調製した。
本実験例では、実験要件に従い、土壌中の塩素系有機農薬の除去効果に関するさまざまな
処理方法の次の組を比較する。実験土壌と分散ＴＤＦを完全に混合し、汚染土壌中のＴＤ
Ｆ濃度を２００μｇ／Ｌにし、混合土壌を１ｋｇの組に分け、汚染土壌として保管する。
ブランク組：２５℃で、１ｋｇの汚染土壌を何にもせずに実施例１に記載の装置に入った
。

In this example, 99.8% pure triadimefone (TDF) was selected as the target contaminant, and the TDF used was from Aladdin Pharmaceutical Company
purchased from y.
In this experimental example, an anatase titanium dioxide-based composite ≧98% nano- _TiO2 is selected as the catalyst, and the nano- _TiO2 used is Shenzhen Chengyin Hig
h-tech Co. , Ltd. Using this nano- _TiO2 as a raw material, 200 μmo
A l/L TiO ₂ standard stock solution was prepared.
This experimental example compares the following set of different treatment methods for their effectiveness in removing chlorinated organic pesticides in soil, according to the experimental requirements. Thoroughly mixing the experimental soil and the dispersed TDF, the TD in the contaminated soil
The F concentration is adjusted to 200 μg/L, and the mixed soil is divided into 1 kg groups and stored as contaminated soil.
Blank set: At 25° C., 1 kg of contaminated soil entered the apparatus described in Example 1 without any treatment.

Experimental set 1: At 25° C., 1 kg of contaminated soil was placed in the apparatus described in Example 1, and only the chemical spray plate 31 was opened to spray TiO ₂ standard undiluted solution.
Experimental set 2: Put 1 kg of contaminated soil into the apparatus described in Example 1 at 25 ° C, and put 3 ultraviolet catalyzers
Only 4 opened.
Experiment set 3: 1 kg of contaminated soil was placed in the apparatus described in Example 1, only the catalyst collector 32 was opened, and the temperature of the beam irradiation area reached 27°C.
Experimental set 4: At 25° C., 1 kg of contaminated soil was put into the apparatus described in Example 1, and the chemical spray plate 31 was used to spray the TiO ₂ standard stock solution, while the ultraviolet catalyzer 34 was opened.
Experimental set 5: Put 1 kg of contaminated soil into the apparatus described in Example 1, and at the same time spray plate 31,
The ultraviolet catalyzer 34 and catalyst collector 32 were opened.
Experimental set 6: In experimental set 6, the other steps were the same as experimental set 5, except that the catalyst concentrator 32 was used to increase the beam irradiation region temperature to 30°C.
Experimental set 7: In Experimental set 7, the steps were the same as Experimental set 6, except that the TDF concentration in the contaminated soil before treatment was 220 μg/L.
Experimental Group 8: Experimental Group 8 was the same as Experimental Group 7 except that the TDF concentration in the contaminated soil before treatment was 250 μg/L.
Experimental Group 9: Experimental Group 9 was the same as Experimental Group 8 except that the TDF concentration in the contaminated soil before treatment was 300 μg/L.
A blank set, contaminated soil treated in experimental sets 1-9 was collected, washed and then liquid chromatography was used to determine the content of TDF in the soil after leaching. The instrument was a liquid chromatography mass spectrometer (LC-MS, Agilent 1260-6420) and the software was Mass Hunter Acquisition SoftwareB. 08.
was 00. Experimental results are shown in Table 2.
Table 2 TDF content in soils treated with different methods

As can be seen by comparing experimental set 1, experimental set 2 and experimental set 3 with the blank set, in experimental set 1 using only catalyst to catalyze the contaminated soil, the amount of TDF removed was 9.32%. can be,
In experimental set 2, in which only the ultraviolet catalyst 34 is used to decompose the contaminated soil with light radiation, the amount of TDF removed is 35.26%, and only the catalyst collector 32 is used to decompose the contaminated soil at high temperatures. In experimental set 3, the amount of TDF removed was 4.17%. In triplicate experiments, experimental sets 1 and 3
The removal effect of TDF was low, and the removal effect of Experimental Group 2 was slightly higher, but did not reach the removal standard for contaminated soil containing organochlorine pesticides.
Comparing Experimental Group 4 with Experimental Groups 1 and 2, the removal rate of TDF in contaminated soil reached 83.11% when the catalyst and photo-emission catalyst were used at the same time, greatly improving the removal rate. However, this is because nano-TiO ₂ has high activity and strong photocatalytic effect, and has extremely strong catalytic decomposition ability for TDF under ultraviolet irradiation.
As can be seen by comparing Set 5 and Set 4, the use of sunlight to increase the temperature of the catalytic decomposition zone can further degrade TDF in contaminated soil, thus increasing the PDF removal rate in Set 5 (86 .
37%) was higher than the previous four experimental sets.
Comparing Experimental Set 6 and Experimental Set 5, it can be seen that the catalytic decomposition efficiency (93.24%) of TDF in soil increased as the temperature of the catalytic decomposition zone increased.
As can be seen by comparing the data of experimental sets 7, 8, and 9, with increasing initial concentration of TDF in contaminated soil, the removal rate of TDF by the device designed according to the present invention first increases, then Diminished. The removal rate increased because the contaminant concentration increased but the upper capacity of the equipment was not reached, so the final removal rate increased as the initial contaminant concentration increased. The reason why the removal rate decreases after increasing is that the initial concentration of PDF in the contaminated soil is too high, the degree of diffusion is limited during the transport process of the contaminated soil, and the bottom layer of the contaminated soil is less affected by light radiation and temperature. There was incomplete removal and decreased final removal rate.
As can be seen from the data in Table 2, the remediation device designed according to the present invention has good remediation effect on soil contaminated with chlorinated organic pesticides during all functional periods. It has a pesticide removal rate of up to 93%, meets remediation standards, and has wide application value.

Claims (6)

A support structure (
10), wherein a material transport belt (211) is provided at the bottom of the inner cavity of said support structure (10), and material Distribution pipe (22), pavement baffle (24), chemical spray plate (31) with nozzle (311), partition plate (121), ultraviolet catalyst (34), catalyst collector (32) and exhaust gas recovery mechanism ( 40) is provided,
At the transport end of said material transport belt (211), there is provided a discharge baffle (14) in close contact with the transport surface, said discharge baffle (14) being located on a discharge port (1) provided on the sealing shell (12).
22) to communicate with the outside,
The feeding end of the material distribution pipe (22) passes through the sealing shell (12) and communicates with the outside, and the discharge end of the material distribution pipe (22) has a distribution hopper (23) with a distribution vibrator (231). provided,
Said pavement baffle (24) is mounted on the sealing shell (1) through the elevating slide block (131).
2) is connected to a sliding support rod (13) provided on the inner wall of 2) and is vertically movable along the sliding support rod (13);
Inside the catalyst collector (32), from top to bottom, a light guide fiber (335) passing through the top of the catalyst collector (32), an optical fiber bundle plate (322), a light guide cylinder (32)
3) and a light outlet (321) with a collecting mirror (324) is provided,
One end of the light guiding fiber (335) remote from the catalyst collector (32) is connected to the sealing shell (1
2) is connected to the light collection mechanism (33) provided on the outer wall of the top part,
The exhaust gas recovery mechanism (40) includes a recovery shell (41), an air inlet (411) is opened at the bottom of the recovery shell (41), an exhaust fan (42) is provided inside, and an exhaust hole is provided at the top. (43) is opened, and the exhaust hole (43) is connected to an exhaust gas treatment mechanism (50) provided on the top outer wall of the sealing shell (12) through an exhaust communication pipe (44). An integrated device for remediation of organochlorine pesticide-contaminated soil and exhaust gas treatment. Inside the ultraviolet catalyzer (34), an ultraviolet generator (343), a group of light guiding lenses (344) and an ultraviolet outlet (343) with an ultraviolet collecting mirror (342) are provided in this order from top to bottom. 2. The integration device according to claim 1, characterized by: The condensing mechanism (33) includes a condensing cylinder base (3) provided on the top outer wall of the sealing shell (12).
36), and a light collecting tube (331) rotatably connected to said light collecting tube base (336), the top of said light collecting tube (331) receiving light through a light collecting support ring (332). lens (3
33), the inner cavity of the light collecting tube (331) is provided with a light collecting tube (334) connected to the light guiding fiber (335), the top of said light collecting tube (334) is a light collecting lens ( 3
33) coincides with the focal point of 33). The exhaust gas treatment mechanism (50) includes an exhaust gas filter shell (51), one end of the internal cavity of the exhaust gas filter shell (51) is connected to the exhaust communication pipe (44), and the other end is in the air flow direction. A plurality of filter plates (511) perpendicular to the airflow circulation direction, and a plurality of exhaust pipes (
512) is provided. in the internal cavity of said exhaust gas filtering shell (51) in a direction parallel to the filtering plate (511),
A cleaning slide rail (513) and a ball screw (531) are provided parallel to each other, and a cleaning slide block (514) is provided on said ball screw (531) slidably connected with the cleaning slide rail (513). and said cleaning slide block (5
14) Integrated device according to claim 4, characterized in that a filter plate cleaner (52) with cleaning brushes (521) is connected thereon. An exhaust gas filter (60) having an outer cylinder (61) and an inner cylinder (63) arranged coaxially
further comprising
An exhaust port (67), a water outlet (66) and a water supply pipe (64) are provided in order from top to bottom on the side wall of the outer cylinder (61), and internal and external cavities are formed at the bottom of the outer cylinder (61). There is provided a vent shell (62) having an exhaust pipe (512) at one end of the outer cavity of said vent shell (62).
), the other end communicates with the bottom end of the side wall of the inner cylinder (63), the top of the inner cavity of the ventilation shell (62) is provided with a rotating support ring (621),
The inner cavity of said inner cylinder (63) is provided with a submerged water supply pipe (65) with a water outlet slot (651) passing axially through the top of the outer cylinder (61), said inner cylinder (63) Ventilation tubes (6
33) is provided, and an inner cylinder support ring (631) is provided on the outer edge of the bottom of the inner cylinder (63) in close contact with the rotation support ring (621), and the central axis of the bottom of the inner cylinder (63) is sequentially , first
a first motor (635
) and connected to
The notch angle of the water passage hole (632) and the side wall of the inner cylinder (63), the ventilation pipe (633) and the inner cylinder (6)
3) The notch angle of the side wall and the notch angle of the side wall of the water supply pipe (64) and the outer cylinder (61) are all of the same magnitude and in the same direction. integrated equipment.

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