JP6965479B1 - Integrated equipment for repairing soil contaminated with organochlorine pesticides and treating exhaust gas - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus capable of simultaneously decomposing soil residual pesticides and decomposing exhaust gas. SOLUTION: A support structure 10 for a material transport belt 211 is provided at the bottom of an internal cavity, and a material distribution pipe 22, a pavement baffle 24, and a chemical spray plate 31 are sequentially provided above the material transport belt 211 along the material transport direction. Residual pesticides and exhaust gas decomposition are simultaneously treated by a device further provided with a partition plate 121, an ultraviolet catalyst 34, a catalyst condenser 32, an exhaust gas treatment mechanism 50 for treating exhaust gas, and an exhaust gas filter. Can be done. [Selection diagram] Fig. 1

Description

The present invention relates to the technical field of contaminated soil remediation, and specifically to an integrated device for repairing organochlorine pesticide-contaminated soil and treating exhaust gas.

A large amount of pesticides are used in agricultural production, and pesticides accumulate in soil media and are difficult to biodegrade, so they exist for a long period of time and become a continuous source of pollution. With the current soil restoration technology, it is not possible to combine the two functions of decomposition of residual pesticides and simultaneous treatment of decomposed exhaust gas, so there is a need for a device that can simultaneously decompose soil residual pesticides and decompose decomposed exhaust gas. There is.

In order to achieve the above object, the present invention provides an integrated device for repairing soil contaminated with organochlorine pesticides and treating exhaust gas, effectively decomposing residual pesticides in the soil, and simultaneously producing exhaust gas. The specific technical solutions for collecting and processing gas are as follows:
The integrated device for repairing organochlorine pesticide-contaminated soil and treating exhaust gas designed by the present invention is a device including a support structure composed of a support bottom plate and a sealing shell provided on the support bottom plate. A material transport belt is provided at the bottom of the internal cavity of the structure, and above the material transport belt, in order along the material transport direction, a material distribution pipe, a pavement baffle, a chemical spray plate with a nozzle, a partition plate, an ultraviolet catalyst, and a catalyst. A condenser and an exhaust gas recovery mechanism are provided.
A discharge baffle that is in close contact with the transport surface is provided at the transport end of the material transport belt, and the discharge baffle penetrates a discharge port provided on the sealing shell and communicates with the outside.
The salary end of the material distribution pipe penetrates the sealing shell and communicates with the outside, and a distribution hopper with a distribution vibrator is provided at the discharge end of the material distribution pipe. The distribution vibrator causes the contaminated soil to fall more uniformly onto the material transport belt from the distribution hopper.
The pavement baffle is connected to a sliding support rod provided on the inner wall of the sealing shell via an elevating slide block, and can move vertically along the sliding support rod. By adjusting the height of the pavement baffle, the thickness of the contaminated soil placed on the material transport belt can be adjusted.
Inside the catalyst concentrator, a light guide fiber, an optical fiber bundle plate, a light guide tube, and a light outlet with a condensing mirror are sequentially provided from top to bottom, penetrating the top of the catalyst concentrator.
One end of the light guide fiber away from the catalytic concentrator is connected to a condensing 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, an exhaust hole is opened at the top, and the exhaust hole is provided through an exhaust communication pipe. It is connected to an exhaust gas treatment mechanism provided on the outer wall of the top of the sealing shell.
As one aspect of the present invention, an ultraviolet generator, a light guide lens group, and an ultraviolet extraction port with an ultraviolet condensing mirror are sequentially provided inside the ultraviolet catalyst from top to bottom. The catalytic concentrator is
Sunlight is used to focus a beam of higher energy density to irradiate contaminated soil, and pesticide residues are catalytically degraded under high temperature and UV conditions.

As one aspect of the present invention, the condensing mechanism includes a condensing cylinder base provided on the outer wall of the top of the sealing shell and a condensing cylinder rotatably connected to the condensing cylinder base, and the condensing mechanism includes the condensing cylinder. The top of the tube is connected to the condensing lens via a condensing support ring, a condensing tube connected to a light guide fiber is provided in the internal cavity of the condensing tube, and the top of the condensing tube is of the condensing lens. Match the focus.
As one aspect of the present invention, the exhaust gas treatment mechanism includes an exhaust gas filtration shell, one end of the internal cavity of the exhaust gas filtration shell is connected to an exhaust communication pipe, and the other end is sequentially along the airflow flow direction. A plurality of layers of filter plates perpendicular to the airflow flow direction and a plurality of exhaust pipes parallel to the airflow flow direction and penetrating the exhaust gas filtration shell are provided.

As one aspect of the present invention, a cleaning slide rail and a ball screw parallel to each other are provided in the internal cavity of the exhaust gas filtration shell in a direction parallel to the filtration plate, and the cleaning slide rail can be slid on the ball screw. A cleaning slide block connected to is provided, and a filter plate cleaner with a cleaning brush is connected on the cleaning slide block. The filter plate cleaner cleans the dust accumulated on the filter plate in a timely manner and prevents clogging of the filter plate.

As an aspect of the present invention, the integrated device further includes an exhaust gas filter having an outer cylinder and an inner cylinder arranged coaxially.
An exhaust port, a water outlet, and a water supply pipe are provided on the side wall of the outer cylinder in order from top to bottom, and a ventilation shell having an inner / outer cavity is provided at the bottom of the outer cylinder, and one end of the outer cavity of the ventilation shell is provided. Communicates with the exhaust pipe, the other end communicates with the bottom end of the side wall of the inner cylinder, and a rotation support ring is provided at the top of the internal cavity of the ventilation shell.
The inner cavity of the inner cylinder is provided with a submerged water supply pipe having a water discharge slot penetrating the top of the outer cylinder along the axis, and the side wall of the inner cylinder is provided with a water passage hole and a water passage hole at intervals along the circumferential direction. A ventilation pipe with a ventilation hole is provided, an inner cylinder support ring that is in close contact with the rotation support ring is provided on the outer edge of the bottom of the inner cylinder, and the central axis of the bottom of the inner cylinder is sequentially a first driven gear and a first driven gear. It is connected to the first motor via the main gear of. The first motor rotates the inner cylinder, agitates the exhaust gas and the exhaust gas treatment liquid, increases the contact area, and accelerates the reaction process.
The notch angle between the water passage hole and the side wall of the inner cylinder, the notch angle between the ventilation 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 the same size and in the same direction. The inner cylinder is rotated and agitated by the acting force of the fluid entering the water supply pipe, and at the same time, the operating force of the first motor is shared to realize energy saving.

As one aspect of the present invention, the material for preparing the material transport belt is a high temperature resistant metal of CrMoV or WCrMoNb in order to prevent damage to the material transport belt at high temperature, and the surface of the material transport belt is plated with a TiO coating layer. , Promotes photocatalytic reaction.
As one aspect of the present invention, the transport speed range of the material transport belt is 40 to 80 m / h.
Since the operating speed of the material transport belt is kept within a reasonable range, not only the processing effect can be ensured, but also the waste of energy can be avoided.

As one aspect of the present invention, the ultraviolet rays generated by the ultraviolet generator are 260 to 380.
It has a wavelength range of nm. In the UV catalytic reaction, the best treatment effect is obtained in a reasonable wavelength range.

Compared with the existing soil restoration device, the present invention has the following beneficial effects.
The present invention not only catalytically decomposes pesticide residues in contaminated soil using an ultraviolet catalyst, but also irradiates the contaminated soil with focused sunlight of a catalytic concentrator to promote the catalytic decomposition, and a catalyst. Exhaust gas generated by decomposition is treated into gas that meets emission standards, and has high application value.

It is a front view of this invention. It is a top view of FIG. It is a front view of the exhaust gas filter of this invention. It is a top view of FIG. It is a partial view of the part A of FIG.

[Explanation of code]
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 Condenser 321 Light outlet 322 Optical fiber bundle plate 323 Light guide tube 324 Condensing mirror 33 Condensing mechanism 331 Condensing cylinder 332 Condensing support ring 333 Condensing lens 334 Condensing tube 335 Light guide fiber 336 Condensing Cylinder base 34 Ultraviolet catalyst 341 Ultraviolet outlet 342 Ultraviolet condensing mirror 343 Ultraviolet 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 filtration shell 511 Exhaust gas filtration 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 flow hole 633 Ventilation pipe 6331 Ventilation hole 634 First driven gear 635 First motor 636 First main gear 64 Water supply pipe 65 Submerged water supply pipe 651 Water discharge slot 66 Water Exit 67 Exhaust

To further illustrate the methods and effects achieved by the present invention, the technical solutions of the present invention, together with the accompanying drawings, will be described clearly and completely below.

Example 1
The first embodiment is intended to explain a specific structure of the apparatus of the present invention, and the contents thereof are as follows.
Referring to FIGS. 1 and 2, the integrated apparatus for repairing organochlorine pesticide-contaminated soil and treating exhaust gas designed by the present invention includes a support bottom plate 11 and a sealing shell 1 provided on the support bottom plate 11.
A device including a support structure 10 composed of 2, a material transport belt 211 is provided at the bottom of an internal cavity of the support structure 10, and materials are sequentially placed above the material transport belt 211 along the material transport direction. Separation 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 4
0 is provided.
A discharge baffle 14 that is in close contact with the transport surface is provided at the transport end of the material transport belt 211, and the discharge baffle 14 penetrates the discharge port 122 provided on the sealing shell 12 and communicates with the outside.
The salary end of the material distribution pipe 22 penetrates the sealing shell 12 and communicates 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. By the distribution vibrator
From the distribution hopper, the contaminated soil falls more uniformly 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 can move vertically along the sliding support rod 13. By adjusting the height of the pavement baffle, the thickness of the contaminated soil placed on the material transport belt can be adjusted.
Inside the catalyst concentrator 32, a light guide fiber 335, an optical fiber bundle plate 322, a light guide cylinder 323, and a light outlet 321 with a condensing mirror 324 penetrating the top of the catalyst concentrator 32 in order from top to bottom. Is provided.
One end of the light guide fiber 335 separated from the catalyst concentrator 32 is connected to a condensing 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 to an exhaust gas treatment mechanism 50 provided on the outer wall of the top of the sealing shell 12 via an exhaust communication pipe 44.
Specifically, inside the ultraviolet catalyst 34, an ultraviolet generator 343, a light guide lens group 344, and an ultraviolet extraction port 343 with an ultraviolet condensing mirror 342 are provided in order from top to bottom. Catalytic concentrators utilize sunlight to focus beams of higher energy density to irradiate contaminated soil, and pesticide residues are catalytically degraded under high temperature and UV conditions.
Specifically, the condensing mechanism 33 is a condensing cylinder base 3 provided on the outer wall of the top of the sealing shell 12.
36, and a condensing cylinder 331 rotatably connected to the condensing cylinder base 336, the top of the condensing cylinder 331 is connected to the condensing lens 333 via a condensing support ring 332, and the condensing cylinder 331. A condensing tube 334 connected to the light guide fiber 335 is provided in the internal cavity of the 331, and the top of the condensing tube 334 coincides with the focal point of the condensing lens 333.
Specifically, the exhaust gas processing mechanism 50 includes an exhaust gas filtration shell 51, one end of the internal cavity of the exhaust gas filtration 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 sequentially perpendicular to the airflow flow direction and a plurality of exhaust pipes 512 that are parallel to the airflow flow direction and penetrate the exhaust gas filtration shell 51 are provided.
Specifically, a cleaning slide rail 513 and a ball screw 531 parallel to each other are provided in the internal cavity of the exhaust gas filtration shell 51 in a direction parallel to the filtration plate 511, and the cleaning slide rail 513 is provided on the ball screw 531. A slidably connected cleaning slide block 514 is provided, and a filter plate cleaner 52 with a cleaning brush 521 is connected on the cleaning slide block 514. The filter plate cleaner 52 cleans the dust accumulated on the filter plate 511 in a timely manner to prevent clogging of the filter plate 511.
Specifically, the integrated device further includes an exhaust gas filter 60 having an outer cylinder 61 and an inner cylinder 63 arranged coaxially.
An exhaust port 67, a water outlet 66, and a water supply pipe 64 are provided on the side wall of the outer cylinder 61 in order from top to bottom, and a ventilation shell 62 having an inner / outer cavity is provided at the bottom of the outer cylinder 61. 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 rotation support ring 621 is provided at the top of the inner cavity of the ventilation shell 62.
A submerged water supply pipe 65 having a water discharge slot 651 that penetrates the top of the outer cylinder 61 along the axis is provided in the inner cavity of the inner cylinder 63, and a space is provided along the circumferential direction on the side wall of the inner cylinder 63. A ventilation pipe 633 with a water passage hole 632 and a ventilation hole 6331 is provided, and an inner cylinder support ring 631 that is in close contact with the rotation support ring 621 is provided on the outer edge of the bottom of the inner cylinder 63, and the bottom of the inner cylinder 63. The central shaft is sequentially connected to the first motor 635 via the first driven gear 634 and the first driving gear 636. The first motor rotates the inner cylinder, agitates the exhaust gas and the exhaust gas treatment liquid, increases the contact area, and accelerates the reaction process.
The water passage hole 632 and the notch angle of the inner cylinder 63 side wall, the ventilation pipe 633 and the notch angle of the inner cylinder 63 side wall, and the water supply pipe 64 and the notch angle of the outer cylinder 61 side wall are all the same size and the same direction. Is.
The inner cylinder 63 is rotated and agitated by the acting force of the fluid entering the water supply pipe 64, and at the same time, the operating force of the first motor 635 is shared to realize energy saving.

Example 2
Example 2 is the same as Example 1 except that:
The prepared material of the material transport belt 211 is a 12CrMoV high temperature resistant metal, and the transport speed range is 40 m / h.
The ultraviolet rays generated by the ultraviolet generator 343 have a wavelength of 260 nm.

Example 3
Example 3 is the same as Example 1 except that:
The preparation material of the material transport belt 211 is W18CrMoNb high temperature resistant metal, and the transport speed range is 80 m / h.
The ultraviolet rays generated by the ultraviolet generator 343 have a wavelength of 380 nm.

Application Examples The present application examples are described based on the contents described in the first embodiment, and an object of the present application examples is to clarify a specific working process of the present invention.
In the actual application process of the present invention, the contaminated soil is first dried and crushed. As shown in FIG. 1, the pretreated contaminated soil is charged 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 materialized. Transport belt 2
Spreading over 11, the material transport belt 211 transports contaminated soil from left to right, paving baffle 2
No. 4 flattens the contaminated soil on the material transport belt 211 to make the thickness uniform, ejects the chemical from the nozzle 311 on the chemical spray plate 31, and the chemical is uniformly sprayed onto the contaminated soil on the material transport belt 211. The ultraviolet rays of the ultraviolet catalyst device 34 are emitted from the ultraviolet outlet 341 to irradiate the contaminated soil, and the pesticide residue in the contaminated soil is catalytically decomposed by the ultraviolet rays.
The sunlight irradiates the condenser lens 333, the condenser lens 333 concentrates the sunlight on the condenser tube 334, and the condensed sunlight is the optical fiber bundle plate 32 by the light guide fiber 335.
It is conducted to 2 and then transmitted to the condensing mirror 324 via the light guide tube 323, and is transmitted to the condensing mirror 32.
By the light-collecting action of 4, the light is emitted from the light outlet 321 and the contaminated soil is irradiated to further remove the pesticide residue in the contaminated soil.
The material transport belt 211 transports the contaminated soil, the contaminated soil is finally discharged from the discharge port 122 and collected, and a part of the soil remaining on the material transport belt 211 is scraped by the upper edge of the discharge baffle 14. Taken.
Exhaust gas and dust generated during the treatment of pesticide residues in contaminated soil are exhaust fan 42.
After the exhaust gas enters the exhaust gas recovery shell 41 through the air inlet 411 under the suction force of the above, the exhaust gas is discharged from the exhaust hole 43, and the exhaust gas discharged from the exhaust hole 43 is an exhaust communication pipe. The exhaust gas in the exhaust gas collection pipe 501 enters the exhaust gas collection pipe 501 through 44, and the exhaust gas in the exhaust gas collection pipe 501 enters the exhaust gas filtration shell 51. The harmful gas in the part is removed, the exhaust gas filtered by the filter plate 511 is discharged from the exhaust pipe 512, and then further processed 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 inside of the inner cylinder 63, and the exhaust gas in the inner cylinder 63 enters the ventilation pipe. 6
It is discharged from the ventilation hole 6331 on 33.
The exhaust gas treatment liquid was introduced into the water supply pipe 64, and the exhaust gas treatment liquid was also introduced into the subsidence water supply pipe 65.
The exhaust gas treatment liquid in the submerged 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 and is a water passage hole as shown in FIG. When the exhaust gas treatment liquid is discharged from the 632, an acting force is applied to the inner cylinder 63, and the inner cylinder 63 rotates.
The exhaust gas discharged from the ventilation hole 6331 and the exhaust gas treatment liquid introduced into the water supply pipe 64 and the submerged water supply pipe 65 sufficiently contact and react with each other, and the treated exhaust gas is discharged from the exhaust port 67 and used. The finished exhaust gas treatment liquid is discharged from the water outlet 66, and is intensively treated and reused.

Experimental Examples The present experimental examples have been described based on the apparatus described in Example 1 and the methods described in the application examples, and are intended to clarify the expression of the present invention in practical applications.
In this experimental example, the experimental site is selected as the experimental site of Nanjing Agricultural University, a clean plot without crops is selected, and a loam soil with a medium sand to clay ratio, good permeability, and good cultivability is selected. Remove the soil from the cultivated layer to a depth of 0 to 20 cm, air dry it, pass it 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 experimental example, triazimephon (TDF) with a purity of 99.8% was selected as the target contaminant, and the TDF used was Aladdin Pharmaceutical Compan.
I bought it from y.
In this experimental example, an anatase-type titanium dioxide-based composite material ≥ 98% nano TiO ₂ is selected as a catalyst, and the nano TiO ₂ used is Shenzhen Chengyin High.
h-tech Co. Purchased from Ltd. 200 μmo using this nano TiO ₂ as a raw material
A l / L TiO ₂ standard stock solution was prepared.
In this experimental example, the following sets of various treatment methods for the effect of removing chlorine-based organic pesticides in soil are compared according to the experimental requirements. Thorough mixing of experimental soil and dispersed TDF, TD in contaminated soil
The F concentration is set to 200 μg / L, and the mixed soil is divided into 1 kg groups and stored as contaminated soil.
Blank group: At 25 ° C., 1 kg of contaminated soil was put into the apparatus according to Example 1 without doing anything.

Experimental group 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 the TiO 2} standard stock solution.
Experimental group 2: At 25 ° C., 1 kg of contaminated soil was placed in the apparatus described in Example 1, and the ultraviolet catalyst 3
Only 4 was opened.
Experimental group 3: 1 kg of contaminated soil was placed in the apparatus described in Example 1, and only the catalytic concentrator 32 was opened, and the temperature of the beam irradiation region reached 27 ° C.
Experimental group 4: At 25 ° C., 1 kg of contaminated soil was placed in the apparatus described in Example 1 and the TiO ₂ standard stock solution was sprayed using the chemical spray plate 31, and at the same time, the UV catalyst 34 was opened.
Experimental group 5: 1 kg of contaminated soil was placed in the apparatus according to Example 1, and at the same time, the spray plate 31,
The ultraviolet catalyst 34 and the catalyst condenser 32 were opened.
Experimental Group 6: In Experimental Group 6, the other steps were the same as in Experimental Group 5, except that the catalyst concentrator 32 was used to raise the beam irradiation region temperature to 30 ° C.
Experimental Group 7: In Experimental Group 7, the other steps were the same as in Experimental Group 6, except that the TDF concentration in the contaminated soil before treatment was set to 220 μg / L.
Experimental Group 8: In Experimental Group 8, the other steps were the same as in Experimental Group 7, except that the TDF concentration in the contaminated soil before treatment was set to 250 μg / L.
Experimental Group 9: In Experimental Group 9, the other steps were the same as in Experimental Group 8 except that the TDF concentration in the contaminated soil before treatment was set to 300 μg / L.
The contaminated soil treated in the blank group and the experimental groups 1 to 9 was collected, washed, and then the content of TDF in the soil after leaching was measured by using liquid chromatography. The instrument is a liquid chromatography-mass spectrometer (LC-MS, Agilent 1260-6420) and the software is Mass Hunter Acquisition Software B. et al. 08.
It was 00. The experimental results are shown in Table 2.
Table 2 TDF content in soil treated differently

As can be seen by comparing Experimental Group 1, Experimental Group 2 and Experimental Group 3 with Blank Group, in Experimental Group 1, which uses only a catalyst to catalyze contaminated soil, the amount of TDF removed was 9.32%. can be,
In the experimental group 2 in which the contaminated soil was decomposed by light radiation using only the ultraviolet catalyst 34, the amount of TDF removed was 35.26%, and the contaminated soil was decomposed at a high temperature using only the catalyst condenser 32. In Experimental Group 3, the amount of TDF removed was 4.17%. In the three sets of experiments, experimental sets 1 and 3
The removal effect of TDF was low, and the removal effect of Experimental Group 2 was slightly high, but it did not reach the standard for removing contaminated soil containing organic chlorine pesticides.
As can be seen by comparing Experimental Group 4 with Experimental Groups 1 and 2, when the catalyst and the photocatalyst are used at the same time, the removal rate of TDF in the contaminated soil reaches 83.11%, and the removal rate is greatly improved. However, this is because Nano TiO ₂ has a high activity and a strong photocatalytic effect, and has an extremely strong catalytic decomposition ability for TDF under irradiation with ultraviolet rays.
As can be seen by comparing Experimental Group 5 and Experimental Group 4, when the temperature of the catalytic decomposition region is raised using sunlight, TDF in the contaminated soil can be further decomposed, so that the PDF removal rate of Experimental Group 5 (86) ..
37%) was higher than the previous four experimental groups.
As can be seen by comparing Experimental Group 6 and Experimental Group 5, the catalytic decomposition efficiency (93.24%) of TDF in the soil increased as the temperature of the catalytic decomposition region increased.
As can be seen by comparing the data of Experimental Groups 7, 8 and 9, as the initial concentration of TDF in the contaminated soil increased, the removal rate of TDF by the apparatus designed by the present invention increased first and then. Diminished. The reason for the increased removal rate was that the concentration of contaminants increased, but the upper limit of the processing capacity of the equipment was not reached, so as the initial concentration of contaminants increased, so did the final removal rate. The reason why the removal rate increases and then decreases is that the initial concentration of PDF in the contaminated soil is too high, the degree of diffusion is limited in the transport process of the contaminated soil, and the contaminated soil in the bottom layer is less affected by light radiation and temperature. Since there was no incomplete removal, the final removal rate was reduced.
As can be seen from the data in Table 2, the restoration device designed by the present invention has a good restoration effect on soil contaminated with chlorinated organic pesticides when all functional periods are in operation. It has a pesticide removal rate of up to 93%, meets repair standards and has wide application value.

Claims (6)

A support structure composed of a support bottom plate (11) and a sealing shell (12) provided on the support bottom plate (11).
A device including 10), wherein a material transport belt (211) is provided at the bottom of the internal cavity of the support structure (10), and the material is sequentially placed above the material transport belt (211) along the material transport direction. Separation pipe (22), pavement baffle (24), chemical spray plate with nozzle (311) (31), partition plate (121), ultraviolet catalyst (34), catalyst condenser (32) and exhaust gas recovery mechanism ( 40) is provided,
A discharge baffle (14) that is in close contact with the transport surface is provided at the transport end of the material transport belt (211), and the discharge baffle (14) is a discharge port (1) provided on the sealing shell (12).
Through 22) and communicate with the outside,
The salary end of the material distribution pipe (22) penetrates the sealing shell (12) and communicates with the outside, and a distribution hopper (23) with a distribution vibrator (231) is provided at the discharge end of the material distribution pipe (22). Provided,
The pavement baffle (24) via the lift slide block (131) sealing the shell (12
) Is connected to the sliding support rod (13) provided on the inner wall, and can move vertically along the sliding support rod (13).
Inside the catalyst concentrator (32), a light guide fiber (335), an optical fiber bundle plate (322), and a light guide tube (32) penetrating the top of the catalyst concentrator (32) in order from top to bottom.
3) and a light outlet (321) with a condensing mirror (324) are provided.
One end of the light guide fiber (335) away from the catalyst concentrator (32) is a sealing shell (1).
It is connected to the light collecting mechanism (33) provided on the outer wall of the top of 2).
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 outer wall of the top of the sealing shell (12) via an exhaust communication pipe (44). An integrated device for repairing organic chlorine-based pesticide-contaminated soil and treating exhaust gas. Inside the ultraviolet catalyst (34), an ultraviolet generator (343), a light guide lens group (344), and an ultraviolet extraction port (343) with an ultraviolet condensing mirror (342) are sequentially provided from top to bottom. The integrated device according to claim 1, wherein the integrated device is characterized by the above. The condensing mechanism (33) is a condensing cylinder base (3) provided on the outer wall of the top of the sealing shell (12).
36), and a condensing cylinder (331) rotatably connected to the condensing cylinder base (336), the top of the condensing cylinder (331) condensing via a condensing support ring (332). Lens (3
A condensing tube (334) connected to the condensing tube (331) and connected to the light guide fiber (335) is provided in the internal cavity of the condensing tube (331), and the top of the condensing tube (334) is a condensing lens (33). 3
33) The integrated device according to claim 1, characterized in that it coincides with the focal point of 33). The exhaust gas treatment mechanism (50) includes an exhaust gas filtration shell (51), one end of the internal cavity of the exhaust gas filtration shell (51) is connected to an exhaust communication pipe (44), and the other end is in the airflow flow direction. A plurality of layers of filter plates (511) perpendicular to the airflow flow direction, and a plurality of exhaust pipes (51) penetrating the exhaust gas filtration shell (51) parallel to the airflow flow direction.
512) The integrated device according to claim 1, wherein 512) is provided. In the direction parallel to the filtration plate (511) in the internal cavity of the exhaust gas filtration shell (51),
A cleaning slide rail (513) and a ball screw (531) parallel to each other are provided, and a cleaning slide block (514) slidably connected to the cleaning slide rail (513) is provided on the ball screw (531). The cleaning slide block (5)
14) The integrated device according to claim 4, wherein a filter plate cleaner (52) with a cleaning brush (521) is connected onto the filter plate cleaner (52). Exhaust gas filter (60) having an outer cylinder (61) and an inner cylinder (63) arranged coaxially.
Including
An exhaust port (67), a water outlet (66), and a water supply pipe (64) are sequentially provided on the side wall of the outer cylinder (61) from top to bottom, and an inner / outer cavity is provided at the bottom of the outer cylinder (61). A ventilation shell (62) is provided, and one end of the outer cavity of the ventilation shell (62) is an exhaust pipe (512).
), The other end communicates with the bottom end of the side wall of the inner cylinder (63), and a rotation support ring (621) is provided at the top of the internal cavity of the ventilation shell (62).
A submerged water supply pipe (65) having a water discharge slot (651) penetrating the top of the outer cylinder (61) along the axis is provided in the inner cavity of the inner cylinder (63). Ventilation pipes (6) with water passage holes (632) and ventilation holes (6331) on the side walls at intervals along the circumferential direction.
33) is provided, and an inner cylinder support ring (631) that is in close contact with the rotation support ring (621) is provided on the outer edge of the bottom of the inner cylinder (63), and the central axis of the bottom of the inner cylinder (63) is sequentially arranged. , 1st
First motor (635) via driven gear (634) and first driving gear (636)
) Connected to
The cutout angle of the water passage hole (632) and the side wall of the inner cylinder (63), and the ventilation pipe (633) and the inner cylinder (6).
3) The first aspect of the present invention, wherein the notch angle of the side wall and the notch angle of the water supply pipe (64) and the outer cylinder (61) side wall are all the same size and the same direction. Integrated device.

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