Polluted site pollutant multi-parameter in-situ detection equipment and method

Abstract

The invention belongs to the field of in-situ detection, and provides a multi-parameter in-situ detection device and method for pollutants in a polluted site. The equipment comprises a sealed shell which is sequentially composed of a power supply and communication short section, a sensor group short section and a ray short section from top to bottom; a power supply / communication management board is arranged in the power supply and communication short section; a power supply circuit and a communication circuit are arranged on the power supply / communication management board; a sensor group is arranged in the sensor group short section; the sensor group comprises a COD (Chemical Oxygen Demand) sensor, a PH value sensor, a water depth sensor and a conductivity sensor, and is used for synchronously acquiring the total amount of organic pollutants in water in the drill hole, the PH value in the water, the water depth and the water conductivity and transmitting the total amount, the PH value, the water depth and the water conductivity to the upper computer through the communication circuit; an XRF spectrograph control panel and an XRF spectrograph are arranged in the ray short section, and the XRF spectrograph is used for collecting heavy metal pollution spectral signals in water and soil in the hole and transmitting the spectral signals to an upper computer through the XRF spectrograph control panel and a communication circuit in sequence.

Description

Technical Field

[0001] This invention belongs to the field of in-situ detection, and in particular relates to an in-situ detection device and method for multiple parameters of pollutants in contaminated sites. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Traditional contaminated site investigations include on-site detection of heavy metal pollution in soil and detection of volatile organic compounds (VOCs) in contaminated soil. For on-site detection of heavy metal pollution in soil, a commonly used method is portable analyzer detection based on electrochemical methods. This method typically requires taking a small sample from the test site, placing it in the analyzer according to the testing requirements, and inferring the concentration of the sample through colorimetric methods. This method is not strictly in-situ detection and has poor quantitative accuracy. For detection of VOCs in contaminated soil, methods generally require manual or mechanical sampling, and sending the samples to a laboratory for analysis and determination of the target pollutants according to standard methods. However, this method often fails to accurately reflect the scope and extent of in-situ contamination due to the volatilization of VOCs during sample collection, preservation, and transportation, as well as the time delay in detection.

[0004] In summary, existing multi-parameter detection methods for pollutants at contaminated sites cannot simultaneously detect soil organic matter and soil heavy metals to meet emergency needs and ensure detection accuracy. Summary of the Invention

[0005] To address the technical problems mentioned above, this invention provides an in-situ multi-parameter detection device and method for pollutants in contaminated sites, which can simultaneously and rapidly detect soil organic matter and soil heavy metals, while meeting emergency needs and ensuring detection accuracy.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: The first aspect of the present invention provides a multi-parameter in-situ detection device for pollutants in contaminated sites.

[0007] A multi-parameter in-situ detection device for pollutants in contaminated sites includes: a sealed housing, wherein the sealed housing is composed of a power supply and communication section, a sensor group section and a radiation section from top to bottom; The power supply and communication section contains a power / communication management board; the power / communication management board is equipped with power circuits and communication circuits; the power circuit is used to provide power to the sensor group section and the radiation section. The sensor group is arranged inside the short section of the sensor group; the sensor group includes a COD sensor, a pH sensor, a water depth sensor and a conductivity sensor, which are used to simultaneously collect the total amount of organic pollutants in the water in the borehole, the pH value, the water depth and the water conductivity and transmit them to the host computer via a communication circuit; The XRF short section is equipped with an XRF spectrometer control board and an XRF spectrometer. The outer casing of the XRF spectrometer is provided with an X-ray window. The XRF spectrometer is used to collect the spectral signals of heavy metal pollution in the water and soil in the hole through the X-ray window and transmit them to the host computer in sequence via the XRF spectrometer control board and communication circuit.

[0008] In one embodiment, the top of the power supply and communication sub-section is provided with a top cover, and the top cover is provided with a waterproof connector and a hanging ring.

[0009] In one embodiment, the power supply and communication section also includes a circuit board bracket, on which the power supply / communication management board is fixed.

[0010] In one embodiment, a waterproof sealing layer is provided at the bottom of the power supply and communication sub-section, and a waterproof connector assembly is provided on the waterproof sealing layer.

[0011] In one embodiment, the top of the sensor assembly section is provided with an adapter end cover, which is used to fix the sensor assembly.

[0012] In one embodiment, a connecting support plate is provided between the sensor group short section and the ray short section, and the connecting support plate is composed of two semicircles spliced ​​together to form a cylinder.

[0013] In one embodiment, the X-ray window is provided with a waterproof sealing layer on the outside.

[0014] In one embodiment, the bottom of the X-ray section is provided with a bottom cover plate, and an XRF spectrometer bracket is installed on the bottom cover plate. The XRF spectrometer bracket is used to support the XRF spectrometer control board and the XRF spectrometer.

[0015] In one implementation, the power supply circuit is also connected to an external power source, which is connected to a host computer.

[0016] A second aspect of the present invention provides a detection method based on an in-situ multi-parameter detection device for pollutants in contaminated sites.

[0017] A detection method based on a multi-parameter in-situ detection device for pollutants in contaminated sites includes: When detecting contaminated sites, boreholes are drilled into the contaminated sites; The in-situ multi-parameter pollutant detection equipment for the contaminated site was suspended by steel wire rope and lowered into the borehole. Using COD sensors, pH sensors, water depth sensors, conductivity sensors, and XRF spectrometers, the total amount of organic pollutants in the borehole water, pH value, water depth, water conductivity, and spectral signals of heavy metal pollution in water and soil are collected simultaneously and transmitted to the host computer. The received signals are analyzed by a host computer to obtain the total amount of organic pollutants, pH value, ion concentration and type in water, and heavy metal pollutant categories in water and soil at different water depths.

[0018] The beneficial effects of this invention are: This invention adopts a modular design, integrating sensors with different functions into different modules. Utilizing COD sensors, pH sensors, water depth sensors, conductivity sensors, and an XRF spectrometer, it simultaneously collects the total amount of organic pollutants in the borehole water, pH value, water depth, water conductivity, and spectral signals of heavy metal pollution in water and soil, and transmits them to the host computer. This enables in-situ, simultaneous, rapid, and accurate detection of multiple parameters of pollutants in contaminated sites, meeting emergency needs and ensuring detection accuracy.

[0019] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0021] Figure 1 This is a circuit diagram of the in-situ multi-parameter pollutant detection device for contaminated sites according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the in-situ multi-parameter pollutant detection device for contaminated sites according to an embodiment of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the structure of the in-situ multi-parameter pollutant detection device for contaminated sites according to an embodiment of the present invention. Figure 2 ; Figure 4 This is a schematic diagram illustrating the application scenario of the in-situ multi-parameter detection equipment for pollutants in contaminated sites according to an embodiment of the present invention.

[0022] The components include: 1. Power supply and communication short section; 2. Sensor group short section; 3. X-ray short section; 4. Waterproof connector; 5. Hanging ring; 6. Top cover; 7. Circuit board bracket; 8. Power / communication management board; 9. Waterproof sealing layer; 10. Waterproof connector group; 11. Adapter end cover; 12. COD organic matter sensor; 13. Water depth sensor; 14. Six-pin male and female connector; 15. Sensor fixing clip; 16. Conductivity sensor; 17. pH sensor; 18. Connecting support plate; 19. XRF spectrometer control board; 20. XRF spectrometer bracket; 21. XRF spectrometer; 22. Bottom cover plate; 23. X-ray window. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] In this invention, terms such as "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "side," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only to facilitate the description of the structural relationships of the various components or elements of this invention and do not specifically refer to any component or element in this invention. They should not be construed as limiting the invention.

[0027] In this invention, terms such as "fixed connection," "connected," and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of these terms in this invention based on the specific circumstances, and they should not be construed as limitations on the invention.

[0028] according to Figures 1-4 As shown in the figure, an in-situ multi-parameter detection device for pollutants in a contaminated site according to an embodiment of the present invention includes: a sealed housing, wherein the sealed housing is composed of a power supply and communication section 1, a sensor group section 2 and a radiation section 3 from top to bottom; The power supply and communication section 1 is internally equipped with a power / communication management board 8; the power / communication management board 8 is provided with power circuits and communication circuits; the power circuit is used to provide power to the sensor group section 2 and the X-ray section 3. The sensor group is arranged inside the short section 2 of the sensor group; the sensor group includes a COD sensor 12, a pH sensor 17, a water depth sensor 13 and a conductivity sensor 16, which are used to simultaneously collect the total amount of organic pollutants in the water in the borehole, the pH value, water depth and water conductivity and transmit them to the host computer via the communication circuit. The XRF short section is equipped with an XRF spectrometer control board 19 and an XRF spectrometer 21. The outer casing of the XRF spectrometer 21 is provided with an X-ray window 23. The XRF spectrometer 21 is used to collect the spectral signals of heavy metal pollution in the water and soil in the hole through the X-ray window 23 and transmit them to the host computer in sequence through the XRF spectrometer control board 19 and the communication circuit.

[0029] It should be noted that in other embodiments, the sensor can be replaced, such as with a salinity sensor or a turbidity sensor, and can be replaced as needed. In this invention, the COD sensor in the organic matter detection module can be replaced with a photoionization sensor (PID), a flame ionization sensor (FID), an electron capture sensor (ECD), or a flame photometric detector (FPD).

[0030] It is understood that the heavy metal detection in the heavy metal detection module of this invention uses X-ray fluorescence spectroscopy (XRF) analysis technology. As an alternative, it can be replaced by atomic absorption spectrometry (AAS), atomic fluorescence spectrometry (AFS), ultraviolet-visible spectrophotometry (UV), or inductively coupled plasma mass spectrometry (ICP-MS).

[0031] The power supply used in this invention is a DC power supply, but it can be replaced with other power supply devices such as batteries as an alternative.

[0032] In this embodiment, the communication circuit can be implemented using a USB interface amplification module. The XRF spectrometer communicates with the host computer via a USB interface to achieve long-distance signal transmission of approximately 20 meters, requiring a USB signal amplification module. The COD sensor, pH sensor, water depth sensor, and conductivity sensor all use RS485 and MODBUS communication protocols, and their data byte format is all 9600 baud rate; therefore, a single interface can be used, and the communication adapter is provided by the power / communication management board.

[0033] In this embodiment, the power supply circuit is used for power management. Since the external power cable is longer than 20m, in order to reduce line loss, the external input DC36-48V power supply is sent to the power / communication management board, which converts it to DC18V and DC5V. The DC18V is used to power the five sensors, and the DC5V is used to power the USB signal amplification module.

[0034] like Figure 4 As shown, the power supply circuit is also connected to an external power source, which is connected to a host computer. The power supply circuit is connected to the external power source via a cable.

[0035] The host computer is responsible for setting parameters, acquiring data, transmitting data, and displaying information for each sensor. The host computer connects to the XRF spectrometer via a USB interface. The XRF spectrometer has a built-in USB network card, allowing the host computer to connect via the corresponding IP address. Communication between the host computer and the COD, pH, water depth, and conductivity sensors all uses an RS485 interface, MODBUS communication protocol, and the same baud rate; a single RS485 / USB converter module can be used for connection.

[0036] This embodiment adopts a unified communication protocol (RS485 and MODBUS) and integrates all sensor communication terminals through a single communication adapter for data transmission, ensuring data synchronization and accuracy. The power supply circuit converts the externally input DC36-48V power supply to different voltage levels to meet the power supply requirements of different sensors and reduce line loss.

[0037] In this embodiment of the invention, the top of the power supply and communication sub-section 1 is provided with a top cover 6, and the top cover 6 is provided with a waterproof connector 4 and a hanging ring 5. The hanging ring 5 is used for the take-off and landing of the multi-parameter in-situ detection equipment for pollutants in contaminated sites. Figure 4 As shown, the in-situ multi-parameter pollutant detection equipment at the contaminated site is connected to a steel wire rope via a hanging ring, and the steel wire rope is wound around a steel wire rope unwinding reel.

[0038] In this embodiment of the invention, the power supply and communication section 1 further includes a circuit board bracket 7, and the power supply / communication management board 8 is fixed on the circuit board bracket 7.

[0039] In this embodiment of the invention, a waterproof sealing layer 9 is provided at the bottom of the power supply and communication subsection 1, and a waterproof connector assembly 10 is provided on the waterproof sealing layer 9.

[0040] In this embodiment of the invention, the top of the sensor assembly section 2 is provided with an adapter end cover 11, which is used to fix the sensor assembly.

[0041] Within the sensor assembly section 2, a six-pin male and female connector 14 and a sensor fixing clip 15 are also provided. The sensor fixing clip 15 is used to fix the COD sensor 12, pH sensor 17, water depth sensor 13 and conductivity sensor 16. The six-pin male and female connector 14 are respectively connected to the COD sensor 12, pH sensor 17, water depth sensor 13, conductivity sensor 16, power cable and communication cable.

[0042] In this embodiment of the invention, a connecting support plate 18 is provided between the sensor group section 2 and the ray section 3, and the connecting support plate 18 is formed by splicing two semicircles into a cylindrical shape.

[0043] In this embodiment of the invention, a waterproof sealing layer is provided on the outside of the X-ray window 23. This prevents foreign objects from coming into contact with the X-ray window.

[0044] In this embodiment of the invention, a bottom cover plate 22 is provided at the bottom of the X-ray section 3, and an XRF spectrometer bracket 20 is installed on the bottom cover plate 22. The XRF spectrometer bracket 20 is used to support the XRF spectrometer control board 19 and the XRF spectrometer 21.

[0045] Because the borehole diameter must be less than 90cm, the sensors need to be integrated within a limited space, especially when the equipment needs to be deployed deep underground or underwater for detection, where space constraints are particularly pronounced. The sensors also need to operate stably under harsh environmental conditions (such as high temperature, high pressure, and humidity), which places high demands on the sensor materials and packaging. This invention employs a modular design, integrating sensors with different functions into different modules for easy maintenance and replacement; and uses high-temperature resistant, pressure-resistant, and waterproof materials to encapsulate the sensors, ensuring their stability in harsh environments.

[0046] The detection method based on the above-described in-situ multi-parameter pollutant detection equipment for contaminated sites includes: Step 1: When detecting a contaminated site, drill holes in the contaminated site; Step 2: The in-situ multi-parameter pollutant detection equipment for the contaminated site is suspended by steel wire rope and lowered into the borehole; Step 3: Using COD sensors, pH sensors, water depth sensors, conductivity sensors, and XRF spectrometers, simultaneously collect the total amount of organic pollutants in the borehole water, pH value, water depth, water conductivity, and spectral signals of heavy metal pollution in water and soil, and transmit them to the host computer. Step 4: Analyze the received signals using a host computer to obtain the total amount of organic pollutants, pH value, ion concentration and types in water at different water depths, and the categories of heavy metal pollutants in water and soil.

[0047] This embodiment utilizes a host computer to analyze the processed data, identify the types and concentration distribution of pollutants, store the analysis results in a database, and provide query and management functions to facilitate subsequent data analysis and report generation.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-parameter in-situ detection device for pollutants in contaminated sites, characterized in that, include: A sealed housing, which is composed of, from top to bottom, a power supply and communication section, a sensor assembly section, and a radiation section; The power supply and communication section contains a power / communication management board; the power / communication management board is equipped with power circuits and communication circuits; the power circuit is used to provide power to the sensor group section and the radiation section. The sensor group is arranged inside the short section of the sensor group; the sensor group includes a COD sensor, a pH sensor, a water depth sensor and a conductivity sensor, which are used to simultaneously collect the total amount of organic pollutants in the water in the borehole, the pH value, the water depth and the water conductivity and transmit them to the host computer via a communication circuit; The XRF short section is equipped with an XRF spectrometer control board and an XRF spectrometer. The outer casing of the XRF spectrometer is provided with an X-ray window. The XRF spectrometer is used to collect the spectral signals of heavy metal pollution in the water and soil in the hole through the X-ray window and transmit them to the host computer in sequence via the XRF spectrometer control board and communication circuit.

2. The in-situ multi-parameter pollutant detection equipment for contaminated sites as described in claim 1, characterized in that, The power supply and communication sub-section is provided with a top cover, and the top cover is provided with a waterproof connector and a hanging ring.

3. The in-situ multi-parameter pollutant detection equipment for contaminated sites as described in claim 1, characterized in that, The power and communication section also includes a circuit board bracket, on which the power / communication management board is fixed.

4. The in-situ multi-parameter pollutant detection equipment for contaminated sites as described in claim 1, characterized in that, The bottom of the power and communication sub-section is provided with a waterproof sealing layer, and a waterproof connector assembly is provided on the waterproof sealing layer.

5. The in-situ multi-parameter pollutant detection equipment for contaminated sites as described in claim 1, characterized in that, The top of the sensor assembly short section is provided with an adapter end cover, which is used to fix the sensor assembly.

6. The in-situ multi-parameter pollutant detection equipment for contaminated sites as described in claim 1, characterized in that, A connecting support plate is provided between the sensor group short section and the ray short section. The connecting support plate is composed of two semicircles spliced ​​together to form a cylinder.

7. The in-situ multi-parameter pollutant detection equipment for contaminated sites as described in claim 1, characterized in that, The X-ray window is equipped with a waterproof sealing layer on the outside.

8. The in-situ multi-parameter pollutant detection equipment for contaminated sites as described in claim 1, characterized in that, The bottom of the X-ray section is provided with a bottom cover plate, and an XRF spectrometer bracket is installed on the bottom cover plate. The XRF spectrometer bracket is used to support the XRF spectrometer control board and the XRF spectrometer.

9. The in-situ multi-parameter detection equipment for pollutants in contaminated sites as described in claim 1, characterized in that, The power supply circuit is also connected to an external power source, which is connected to a host computer.

10. A detection method based on the in-situ multi-parameter pollutant detection equipment for contaminated sites as described in any one of claims 1-9, characterized in that, include: When detecting contaminated sites, boreholes are drilled into the contaminated sites; The in-situ multi-parameter pollutant detection equipment for the contaminated site was suspended by steel wire rope and lowered into the borehole. Using COD sensors, pH sensors, water depth sensors, conductivity sensors, and XRF spectrometers, the total amount of organic pollutants in the borehole water, pH value, water depth, water conductivity, and spectral signals of heavy metal pollution in water and soil are collected simultaneously and transmitted to the host computer. The received signals are analyzed by a host computer to obtain the total amount of organic pollutants, pH value, ion concentration and type in water, and heavy metal pollutant categories in water and soil at different water depths.

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