CN111889503A - Sampling and in-situ remediation device for volatile organic compound contaminated soil and application thereof - Google Patents
Sampling and in-situ remediation device for volatile organic compound contaminated soil and application thereof Download PDFInfo
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- CN111889503A CN111889503A CN202010754964.0A CN202010754964A CN111889503A CN 111889503 A CN111889503 A CN 111889503A CN 202010754964 A CN202010754964 A CN 202010754964A CN 111889503 A CN111889503 A CN 111889503A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Abstract
The invention relates to a sampling and in-situ remediation device for volatile organic compound contaminated soil and application thereof, wherein the device comprises a mobile module, a soil sampling module, a medicament injection module and a control module, wherein the soil sampling module, the medicament injection module and the control module are arranged on the mobile module; the soil sampling module is provided with a sampling tube moving mechanism, an impact power head, a sampling tube fixer and a sampling tube which are connected in sequence; the drug injection module is provided with a liquid storage tank, a high-pressure drug injection pump and a drug feeding spray head which are connected in sequence, and the drug feeding spray head is communicated with the sampling pipe. Compared with the prior art, the soil sampling and repairing integrated machine has the advantages that the soil sampling and repairing functions are integrated, the whole structure is simple and compact, the sealing performance is good, the full-automatic control and monitoring can be realized, the whole-process automatic tracking recording of the experimental process and data, the automatic control and the electric movement of the repairing process can be realized, the operation is simple, the working efficiency is improved, the economy and the practicability are realized, the medicament utilization rate is high, and the repairing cost is greatly reduced.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to a sampling and in-situ remediation device for volatile organic compound contaminated soil.
Background
In recent years, with the rapid development of modern industry and the acceleration of urbanization process, a large number of chemical enterprises which are moved or about to be shut down appear in China. However, in the past production and operation of the enterprises, due to the reasons of poor environmental protection awareness, poor management and the like, a large amount of toxic and harmful substances, particularly organic pollutants enter the soil, and a serious site soil pollution problem occurs.
Volatile Organic Compounds (VOCs) in soil are the major pollutants in the atmosphere and they react with atmospheric nitrogen oxides to produce photochemical smog, thereby endangering urban air quality and human health. When the soil contains excessive harmful substances and exceeds the self-cleaning capacity of the soil, the composition, the structure and the function of the soil are changed, the activity of microorganisms is inhibited, and the harmful substances or decomposition products thereof are gradually accumulated in the soil and are indirectly absorbed by the human body through the soil → plants → the human body or through the soil → water → the human body, so that the degree of harming the health of the human body is reached, namely the soil pollution.
Legislation for soil remediation started in japan in the 80 s of the 20 th century, and is the country where soil remediation was first valued, and domestic technologies for treating soil groundwater pollution are in the initial stages of research and engineering exploration. At present, the soil remediation technology mainly comprises three modes of physical remediation, chemical remediation and biological remediation. The method is a common method for adding the medicament into the soil, but no mature medicament adding equipment exists at present, most of the medicament is added in an ectopic adding mode, the equipment is complex, the operation is difficult, the efficiency is low, and the repairing requirement of a large amount of polluted soil cannot be met.
Disclosure of Invention
The invention aims to provide a device for sampling and in-situ remediation of volatile organic compound contaminated soil, which integrates surveying and remediation, has a simple structure, is simple and convenient to operate, has high soil remediation efficiency, and an application thereof.
The purpose of the invention can be realized by the following technical scheme:
the invention provides a sampling and in-situ remediation device for volatile organic compound contaminated soil, which comprises a mobile module, a soil sampling module, a medicament injection module and a control module, wherein the soil sampling module, the medicament injection module and the control module are arranged on the mobile module;
the soil sampling module is provided with a sampling tube moving mechanism arranged at the front part of the moving module, an impact power head connected with the sampling tube moving mechanism, a sampling tube fixer arranged at the lower end of the impact power head and a sampling tube connected to the lower end of the sampling tube fixer;
the drug injection module is provided with a liquid storage tank, a high-pressure drug injection pump and a drug feeding spray head which are sequentially connected, and the drug feeding spray head is communicated with the sampling pipe;
the soil sampling module and the medicament injection module are electrically connected with the control module.
As a preferable technical scheme of the invention, the sampling tube consists of an inner soil sampling tube and an outer medicament injection tube which are sleeved with each other, the sampling tube fixer is sleeved and fixed at the upper end of the outer medicament injection tube, and an annular gap is formed between the inner soil sampling tube and the outer medicament injection tube to form a medicament injection area.
As a preferable technical scheme of the invention, the cross section of the tail end of the medication nozzle is of an annular passage structure matched with the medicament injection area, and the soil sampling inner tube and the medicament injection outer tube are connected with the medication nozzle in a threaded sealing connection mode.
As the preferable technical scheme of the invention, the soil sampling inner tube and the medicament injection outer tube are both of an internal thread structure and an external thread structure at two ends, are used for adjusting the length by connecting a plurality of sections of threads, each section has the length of 0.3-0.5m, and can be connected with 4 sections (including the front end and the tail end) at most.
As a preferable technical scheme of the present invention, the moving module includes a cart, an electric driving wheel is arranged at the bottom of the cart, an operating handle is arranged at the rear part of the cart, and a vehicle speed control switch is arranged on the operating handle.
As a preferable technical scheme of the invention, the sampling tube moving mechanism is provided with a guide rail which is vertically arranged and a crawler belt or a chain which is used for driving the impact power head to move along the guide rail.
As the preferable technical scheme of the invention, the impact power head is provided with a gasoline pump and an electric control mechanism and can be continuously pushed downwards.
As a preferred technical solution of the present invention, the control module includes a PLC controller and a control terminal in communication connection with the PLC controller.
The second aspect of the present invention provides an application of the device for sampling and in-situ remediation of volatile organic compound contaminated soil, which is characterized in that the device is used for remediation of volatile organic compound contaminated soil, and comprises the following steps:
s1: assembling the device;
s2: controlling a sampling pipe moving mechanism to drive a sampling pipe to move downwards to contact the ground, opening an impact power head, continuously pressing the sampling pipe downwards into the soil, and stopping impacting the power head when the digging depth reaches 70-80% of the length of the sampling pipe;
s3: according to different repairing medicaments, the following two different medicament injection modes are adopted:
s3-1: pre-repairing, starting and stopping a high-pressure medicament injection pump and an impact power head at the same time, and injecting repairing medicaments in situ through a medicament injection nozzle when the excavation depth is downward;
s3-2: and (3) after repairing, the sampling pipe stops digging deeply, the impact power head stops impacting, when the sampling pipe moving mechanism starts to drive the sampling pipe to pull up, the high-pressure medicament injection pump is started simultaneously, and when the sampling pipe moving mechanism stops, the high-pressure medicament injection pump stops simultaneously.
As the preferable technical scheme of the invention, the injection pressure is not less than 3.0MPa when the anterior repair is carried out; when the device is used for post repair, the injection pressure is not more than 3.0 MPa.
Compared with the prior art, the soil sampling and repairing integrated machine has the advantages that the soil sampling and repairing functions are integrated, the whole structure is simple and compact, the sealing performance is good, the full-automatic control and monitoring can be realized, the whole-process automatic tracking recording of the experimental process and data, the automatic control and the electric movement of the repairing process can be realized, the operation is simple, the working efficiency is greatly improved, the economy and the practicability are realized, the medicament utilization rate is high, and the repairing cost is greatly reduced.
Drawings
FIG. 1 is a schematic front view of the device of the present invention.
FIG. 2 is a schematic view of the structure of the apparatus of the present invention.
Fig. 3 is a schematic view of the outer drug injection tube of the device of the present invention.
FIG. 4 is a schematic view of the inner soil sampling pipe of the device of the present invention.
Fig. 5 is a partial schematic view of the connection of the administration spray head and the sampling tube of the device of the present invention.
In the drawing, 11 is a cart, 12 is an electric drive wheel, 13 is an operation handle, 14 is a vehicle speed control switch, 21 is a sampling tube moving mechanism, 211 is a guide rail, 212 is a crawler, 22 is an impact power head, 221 is a gasoline pump, 222 is an electric control mechanism, 23 is a sampling tube holder, 24 is a sampling tube, 241 is an earth-taking inner tube, 242 is a drug injection outer tube, 243 is a drug injection area, 31 is a reservoir tank, 32 is a high-pressure drug injection pump, 33 is a drug delivery nozzle, 331 is a circular passage structure, 41 is a PLC controller, and 42 is a control terminal.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
A sampling and in-situ remediation device for volatile organic compound contaminated soil is disclosed, as shown in figures 1-2, and comprises a mobile module, and a soil sampling module, a medicament injection module and a control module which are arranged on the mobile module, wherein the mobile module is provided with a sampling and in-situ remediation device; the soil sampling module is provided with a sampling tube moving mechanism 21 arranged at the front part of the moving module, an impact power head 22 connected with the sampling tube moving mechanism 21, a sampling tube fixer 23 arranged at the lower end of the impact power head 22 and a sampling tube 24 connected to the lower end of the sampling tube fixer 23; the medicament injection module is provided with a liquid storage tank 31, a high-pressure medicament injection pump 32 and a dosing spray head 33 which are sequentially connected, and the dosing spray head 33 is communicated with the sampling pipe 24; the soil sampling module and the medicament injection module are both electrically connected with the control module.
In one embodiment, as shown in fig. 1-2, the moving module includes a cart 11, the bottom of the cart 11 is provided with an electric driving wheel 12, the rear portion of the cart 11 is provided with an operating handle 13, and the operating handle 13 is provided with a vehicle speed control switch 14 (which is used for enabling the cart to move forward at a certain speed (response time is preferably less than 1s) by rotating the switch, and can be configured to adjust the moving direction of the cart by rotating the handle). The cart 11 can be a portable automatic trolley, is suitable for complex road conditions such as outdoor construction sites, and has the advantages of stable operation, simple operation and long driving distance. The automatic trolley is designed to be electrically driven, and a rechargeable accumulator jar (not shown in the figure) positioned below the accumulator tank 31 is arranged in the automatic trolley.
In one embodiment, the sampling tube moving mechanism 21 may have a vertically disposed track 211 and a track 212 or chain for moving the impact head 22 along the track 21. The sampling pipe 24 can be driven at a constant speed at a time beyond the downward digging depth of the sampling pipe. When the sampling pipe 24 is dug down to a deep depth, the sampling pipe moving mechanism 21 is in a stop state. As shown in fig. 2, one scenario is shown in which the percussion head is moved by tracks 212. In one embodiment, impact head 22 has a gasoline pump 221 and an electrical control mechanism 222 that are continuously pushed downward to continuously force sampling tube 24 downward into the soil without a pulling motion in between. The electric control mechanism 222 and the gasoline pump 221 may adopt related devices of the prior art. The electric control mechanism 222 can control the impact frequency and power of the gasoline pump 221 during switching and starting. Impact head 22 may include a hand grip for opening the interior to provide access for maintenance in the event of a malfunction or power failure.
In one embodiment, as shown in fig. 3, 4 and 5, the sampling tube 24 comprises an inner soil sampling tube 241 and an outer drug injection tube 242, wherein the inner soil sampling tube 241 is sealed at the upper end and the outer drug injection tube 242 is open at the upper end. The sampling tube holder 23 is fitted over and fixed to the upper end of the drug injection outer tube 242 (the distance between the bottom of the sampling tube holder 23 and the ground may be set to 1.0m to 1.5m in a normal state). An annular gap is formed between the soil sampling inner tube 241 and the agent injection outer tube 242, and an agent injection region 243 is formed. The soil sampling inner tube 241 and the medicament injection outer tube 242 are both of an inner and outer thread structure at both ends, and are used for adjusting the length through multi-section threaded connection. In one embodiment, a distance measuring sensor assembly (which may be a related component of the prior art) may be installed at the bottom of the sampling tube holder 23, the sensor employs the ultrasonic distance measuring principle, the function of the sensor is to accurately measure the sampling depth, and perform data transmission with the control system through the wireless transmission module, and after the sampling depth is set through software, when the sampling tube reaches the set soil depth, the impact power head 22 may be automatically stopped. The impact power head 22 may be controlled by the control module to perform different modes of depth-down sampling. The sampling pipe 24 is used for collecting soil collected downwards in the digging depth and providing a medicament injection area 243 for injecting a repairing medicament, and the sampling pipe moving mechanism 21 is used for driving the sampling pipe 24 to move at a constant speed before and after the digging depth of the sampling pipe 24 is impacted.
In one embodiment, the reservoir 31 (which may have a volume of no less than 1 m)3) A high-pressure medicament injection pump 32 arranged in the cart 11 and connected with the high-pressure medicament injection pump 32 by a pipeline, the high-pressure medicament injection pump 32 is connected with a medicine injection nozzle 33 arranged at the rear end of the impact power head 22 by a pipeline, the tail end section of the medicine injection nozzle 33 is in an annular passage structure 331 matched with the medicament injection area 243, and the soil sampling inner tube 241 and the medicament injection outer tube 242 are connected to the administration head 33 by means of a screw-tight connection. As shown in fig. 1 and 5. In one embodiment, the drug injection module employs an in-situ high-pressure injection type remediation technology, and injects the drug into the deeper layer of the soil in the form of high-speed fine particles through the high-pressure drug injection pump 32 and the drug injection nozzle 33, so as to achieve complete radial and axial penetration of the soil layer, and obtain the optimal remediation effect. The liquid storage tank 31 is internally provided with a liquid level sensor which can monitor the medicament injection amount in real time. The high-pressure medicament injection pump 32 adopts a set of high-pressure gear pumps and can provide high-pressure medicaments for a high-pressure nozzle, the chemical dosing nozzle 33 can adopt a circular rotary jet type power nozzle form, the section specification is consistent with the medicament injection area 243 surrounded by the pipe walls of the inner pipe and the outer pipe of the sampling pipe 24, the filling amount and the filling rate of the medicaments can be set through programs, and the pressure can be automatically adjusted according to the digging depth speed and the depth, so that the full-automatic restoration of the soil can be realized.
In one embodiment, the control module has a PLC controller 41 and a control terminal 42 communicatively coupled to the PLC controller 41. The control terminal is preferably a capacitive touch display terminal. Preferably, the control terminal 42 is in wireless communication with the control terminal 42. The control module preferably comprises a database system, can establish a document for storing experimental data, and can well store and effectively track experiments. The module can be used for on-site experimental data such as: parameters such as soil sampling depth, medicament injection amount and medicament injection rate are recorded in real time, and full-automatic control of soil sampling, soil remediation and the like is realized. The control module is operated through the capacitive touch display terminal, and the operation comprises control of soil sampling depth, sampling speed, medicament repairing mode and parameter setting in the operation. And the PLC is adopted for control, so that various parameters can be accurately adjusted to adapt to soil remediation in different operating environments.
The application of the device for sampling and in-situ repairing the volatile organic compound contaminated soil is used for repairing the volatile organic compound contaminated soil, and comprises the following steps:
s1: assembling the device;
s2: controlling the sampling pipe moving mechanism 21 to drive the sampling pipe 24 to move downwards to contact the ground, turning on the impact power head 22, continuously pressing the sampling pipe 24 downwards into the soil, and stopping impacting the power head 22 when the digging depth reaches 70-80% of the length of the sampling pipe 24;
s3: according to different repairing medicaments, the following two different medicament injection modes are adopted:
s3-1: pre-repairing, namely starting and stopping the high-pressure medicament injection pump 32 and the impact power head 22 at the same time, and injecting repairing medicaments in situ through a medicament injection nozzle 33 when the hole is dug deeply;
s3-2: and (3) after repairing, wherein the sampling pipe 24 stops digging deeply, the impact power head 22 stops impacting, when the sampling pipe moving mechanism 21 starts to drive the sampling pipe 24 to pull up, the high-pressure medicament injection pump 32 is started simultaneously, and when the sampling pipe moving mechanism 21 stops, the high-pressure medicament injection pump 32 stops simultaneously.
Preferably, when the anterior repair is carried out, the injection pressure is not less than 3.0 MPa; when the device is used for post repair, the injection pressure is not more than 3.0 MPa.
The sampling module can detect the soil property change condition of the restored soil. The medicament injection module can provide different medicament injection methods for different repairing medicaments, adopts sampling in-situ injection for internal medicaments and adopts sampling in-situ injection for surface covering medicaments.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. A sampling and in-situ remediation device for volatile organic compound contaminated soil is characterized by comprising a mobile module, a soil sampling module, a medicament injection module and a control module, wherein the soil sampling module, the medicament injection module and the control module are arranged on the mobile module;
the soil sampling module is provided with a sampling tube moving mechanism (21) arranged at the front part of the moving module, an impact power head (22) connected with the sampling tube moving mechanism (21), a sampling tube fixer (23) arranged at the lower end of the impact power head (22) and a sampling tube (24) connected to the lower end of the sampling tube fixer (23);
the drug injection module is provided with a liquid storage tank (31), a high-pressure drug injection pump (32) and a drug administration spray head (33) which are sequentially connected, and the drug administration spray head (33) is communicated with the sampling pipe (24);
the soil sampling module and the medicament injection module are electrically connected with the control module.
2. The sampling and in-situ remediation device for soil contaminated by volatile organic compounds as claimed in claim 1, wherein the sampling tube (24) comprises an inner soil sampling tube (241) and an outer drug injection tube (242), the inner soil sampling tube and the outer drug injection tube are sleeved with each other, the sampling tube holder (23) is sleeved and fixed on the upper end of the outer drug injection tube (242), and an annular gap is formed between the inner soil sampling tube (241) and the outer drug injection tube (242) to form a drug injection region (243).
3. The sampling and in-situ remediation device for soil contaminated by volatile organic compounds according to claim 2, wherein the cross section of the end of the chemical injection nozzle (33) is an annular passage structure (331) matched with the chemical injection region (243), and the soil sampling inner tube (241) and the chemical injection outer tube (242) are connected with the chemical injection nozzle (33) in a threaded sealing connection manner.
4. The device for sampling and in-situ remediation of volatile organic compound contaminated soil according to claim 1, wherein the soil sampling inner tube (241) and the medicament injection outer tube (242) are both of a structure with internal and external threads at both ends, and are used for adjusting the length by connecting a plurality of sections of threads, each section of the length is 0.3-0.5m, and 4 sections of the length are connected at most.
5. The device for sampling and in-situ remediation of volatile organic compound (voc) -contaminated soil according to claim 1, wherein the moving module comprises a cart (11), an electric driving wheel (12) is arranged at the bottom of the cart (11), an operating handle (13) is arranged at the rear part of the cart (11), and a vehicle speed control switch (14) is arranged on the operating handle (13).
6. The device for sampling and in-situ remediation of volatile organic compound (voc) -contaminated soil according to claim 1, wherein the sampling pipe moving mechanism (21) comprises a vertically arranged guide rail (211) and a track (212) or chain for driving the impact power head (22) to move along the guide rail (21).
7. The device for sampling and in-situ remediation of volatile organic compounds (voc) -contaminated soil according to claim 1, wherein the impact power head (22) has a gasoline pump (221) and an electric control mechanism (222), and is capable of being continuously pushed downward.
8. The sampling and in-situ remediation device for volatile organic compound contaminated soil according to claim 1, wherein the control module comprises a PLC (41) and a control terminal (42) in communication connection with the PLC (41).
9. The application of the device for sampling and in-situ remediation of volatile organic compound contaminated soil according to any one of claims 1 to 8, which is used for remediation of volatile organic compound contaminated soil, comprises the following steps:
s1: assembling the device;
s2: controlling a sampling pipe moving mechanism (21) to drive a sampling pipe (24) to move downwards to contact the ground, opening an impact power head (22), continuously pressing the sampling pipe (24) downwards into the soil, and stopping impacting the power head (22) when the digging depth reaches 70-80% of the length of the sampling pipe (24);
s3: according to different repairing medicaments, the following two different medicament injection modes are adopted:
s3-1: the preposed restoration is realized by starting and stopping a high-pressure medicament injection pump (32) and an impact power head (22) simultaneously and injecting restoration medicaments in situ through a medicament injection nozzle (33) when the hole is dug deeply;
s3-2: and (2) after repairing, the sampling pipe (24) stops digging deeply, the impact power head (22) stops impacting, when the sampling pipe moving mechanism (21) starts to drive the sampling pipe (24) to be pulled out, the high-pressure medicament injection pump (32) is started simultaneously, and when the sampling pipe moving mechanism (21) stops, the high-pressure medicament injection pump (32) stops simultaneously.
10. The application of the device for sampling and in-situ remediation of Volatile Organic Compounds (VOCs) -contaminated soil according to claim 9, wherein the injection pressure is not less than 3.0MPa during pre-remediation; when the device is used for post repair, the injection pressure is not more than 3.0 MPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010754964.0A CN111889503A (en) | 2020-07-31 | 2020-07-31 | Sampling and in-situ remediation device for volatile organic compound contaminated soil and application thereof |
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| CN202010754964.0A CN111889503A (en) | 2020-07-31 | 2020-07-31 | Sampling and in-situ remediation device for volatile organic compound contaminated soil and application thereof |
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