A device for in-situ fluorescence monitoring of petroleum hydrocarbon contamination at a site

Abstract

The present application relates to a kind of field petroleum hydrocarbon pollutant fluorescence in situ monitoring device, the present application uses field petroleum hydrocarbon pollutant fluorescence in situ monitoring device first in the place to be detected site carries out pore making, then control the detection window of field petroleum hydrocarbon pollutant fluorescence in situ monitoring device reaches specified depth, detects petroleum hydrocarbon pollutant in the soil at specified depth.The present application can realize the rapid detection of petroleum hydrocarbon pollutant of contaminated site, especially in the detection of vertical direction is faster.Pore making construction is carried out using vibrator, pore making rate is fast, construction efficiency is high, can also carry out hole cleaning operation, avoids complex soil sampling process.Using the present application can quickly obtain the petroleum hydrocarbon distribution and concentration information of contaminated area, to provide accurate data support for soil remediation.The present application solves the mutual interference problem caused by existing detection means, and the detection precision is higher, and the detection error is smaller.

Description

TECHNICAL FIELD

[0001] The application relates to a field petroleum hydrocarbon pollutant fluorescence in-situ monitoring device and belongs to the technical field of pollutant monitoring. BACKGROUND

[0002] In the surface water quality standard GB3838-2002 of China, the standard value (type I) of petroleum is less than or equal to 0.05 mg / L. The exhibition land soil environmental quality evaluation standard (HJ350-2007) implemented on August 1, 2007 stipulates that the A-class standard of the soil environment petroleum hydrocarbon limit is 1000 mg / kg. In 2006, the People's Republic of China national drinking water standard (GB5749-2006) was published and compulsorily implemented in 2012, which proposes that the total petroleum hydrocarbon limit is 0.3 mg / L. In late 2007, the Hong Kong Special Administrative Region Environmental Protection Bureau made provisions for the limits of petroleum hydrocarbons in groundwater and soil according to the purposes of urban residential, rural residential, industrial and park, and made specific requirements for the remediation standards and solubility limits of the three groups (C6-C8, C9-C16, C17-C35) according to the different carbon numbers.

[0003] The test methods of petroleum hydrocarbon content include weight method, ultraviolet spectrophotometry, infrared spectrophotometry, fluorescence spectrophotometry, gas chromatography and gas chromatography-mass spectrometry. The weight method, ultraviolet spectrophotometry and infrared spectrophotometry can only determine the total amount of petroleum hydrocarbons according to their respective principles.

[0004] The field petroleum hydrocarbon pollutant has been the focus of environmental protection departments for a long time. At present, the on-site sampling-laboratory analysis method based on infrared spectrophotometry, high-performance liquid chromatography and gas chromatography is mainly used for the petroleum hydrocarbon pollutant of industrial contaminated sites, and chemical indicators are used to analyze the types and contents of pollutants. At present, a complex sampling process is still needed for deep soil, and a drill is used to sample from different depth soil layers for measurement. If real-time and in-situ detection of the vertical profile distribution of the field petroleum hydrocarbon pollutant is to be achieved, reference can be made to the “polluted site petroleum hydrocarbon pollutant vertical profile distribution in-situ detection system” disclosed in the authorized announcement CN111089852B, the “laser-induced fluorescence system for rapidly detecting petroleum hydrocarbon pollutants in soil on site” disclosed in the publication CN110231319A and the paper “soil petroleum hydrocarbon pollutant fluorescence measurement technology and application research” published by Zuo Zhaolu of China University of Science and Technology. Among them, the latter two are not adopted by our unit because of the high price of the equipment. Our unit carries out tests according to the “polluted site petroleum hydrocarbon pollutant vertical profile distribution in-situ detection system” disclosed in the authorized announcement CN111089852B, and finds that although real-time and in-situ detection of the vertical profile distribution of the field petroleum hydrocarbon pollutant can be achieved, the following defects exist in the use process:

[0005] The drilling efficiency is limited by using the drill bit. In addition, when detecting at different depths of deep soil, even if the surface of the equipment is cleaned each time, once the drill bit is returned to the inside of the drilling hole, some soil will be attached or rubbed against the quartz glass of the detection window, which can easily cause interference during detection due to the attached soil, thereby affecting the accuracy of the subsequent detection results.

[0006] Therefore, the present application is proposed. SUMMARY

[0007] The present application provides a site petroleum hydrocarbon pollutant fluorescence in-situ monitoring device to solve the problems in the prior art.

[0008] A site petroleum hydrocarbon pollutant fluorescence in-situ monitoring method comprises the following steps:

[0009] The site petroleum hydrocarbon pollutant fluorescence in-situ monitoring device is used to make holes in the site to be detected, and then the detection window of the site petroleum hydrocarbon pollutant fluorescence in-situ monitoring device is controlled to reach a specified depth, so as to detect petroleum hydrocarbon pollutants in the soil at the specified depth.

[0010] Further improvement, the site petroleum hydrocarbon pollutant fluorescence in-situ monitoring device comprises a vibrator, the vibrator comprises a vibration shell, a vibration head located at the lower part of the vibration shell, a main shaft located inside the vibration shell, a plurality of sets of eccentric blocks installed outside the main shaft, two sets of wing plates symmetrically installed outside the vibration shell, the main shaft is driven to rotate by a motor or a hydraulic motor, and the wing plates are arranged along the axial direction of the vibration shell; two sets of arc-shaped machine housings are further arranged outside the vibration shell, transition housings are connected to the upper and lower ends of the machine housings respectively, the two transition housings are arranged in an axial symmetry, the outer side wall of the transition housing is a conical surface structure, the tail ends of the transition housings are fixedly connected with the machine housings, the thickness of the tail end of the transition housing is greater than that of the head end of the transition housing; a detection window is arranged on the outer side wall of one of the machine housings; the two machine housings are located between the two wing plates, an instrument containing cavity is arranged between the machine housing and the vibration shell, and a fluorescence in-situ detection mechanism for detecting petroleum hydrocarbon pollutants is arranged in the instrument containing cavity.

[0011] Further improvement, the fluorescence in-situ detection mechanism comprises a lens assembly located at the detection window, the lens assembly comprises a convex lens, a concave lens, and a light shield plate for sealing the upper and lower ends of the convex lens and the concave lens, a containing chamber is formed between the convex lens, the concave lens and the light shield plate, the containing chamber is filled with a refractive liquid, and the convex lens is located outside the detection window.

[0012] Further improvement, a counterweight is further arranged in one of the instrument containing cavities.

[0013] Further improvement, the connecting part between the detection window and the tail end of the transition shell is provided with a plurality of water injection holes, the aperture of the water injection hole is less than 2mm, and the injection direction of the water injection hole is aligned with the outer side wall of the convex lens; the inside of the transition shell is provided with a water channel I in communication with the water injection hole.

[0014] Further improvement, the outer side wall of the convex lens is a spherical cap structure, the central angle corresponding to the cross section of the outer side wall of the convex lens is δ, and 1°≤δ≤9°; the taper angle corresponding to the outer side wall of the transition shell is γ, and γ=(5~6)δ.

[0015] Further improvement, the fluorescence in situ detection mechanism further comprises a fluorescence excitation module, a fluorescence detection module, a photomultiplier module and a signal processing module, the fluorescence excitation module emits ultraviolet light with a wavelength of 270~320nm, the ultraviolet light with a wavelength of 270~320nm is focused and irradiates the soil outside the detection window through the lens assembly and excites fluorescence, and the fluorescence is focused, photoelectric multiplied, filtered and obtained after the lens assembly at the detection window to obtain pretreated fluorescence.

[0016] When the pretreated fluorescence contains fluorescence signals with a wavelength of 350~450nm, the fluorescence signals with a wavelength of 350~450nm are perceived by the fluorescence detection module, the fluorescence signals are converted into electrical signals, and the electrical signals are transmitted to the signal processing module, the signal processing module processes the electrical signals and transmits them to the processor on the ground to complete the detection.

[0017] Further improvement, the refractive liquid is composed of peony seed oil, sandech seed oil and tetrahydrofuran in a mass ratio of 2.3:1:(0.5~0.6).

[0018] Further improvement, δ=7.1° and γ=35.5°.

[0019] Further improvement, the vibrator performs a pore-forming operation at the site to be detected.

[0020] The beneficial effects of the present application are as follows:

[0021] 1. The present application can realize rapid detection of petroleum hydrocarbon pollutants in contaminated sites, especially in the vertical direction.

[0022] 2. By optimizing the structure of the existing vibrator, the vibrator is used for pore-forming construction without affecting the pore-forming rate of the existing vibrator, the pore-forming rate is fast, the construction efficiency is high, in addition, the hole cleaning operation can be performed, the implementation effect is good, and the complex soil sampling process is avoided.

[0023] 3、The present application directly detects the petroleum hydrocarbon pollutants in deep soil quickly and in-situ, and the detection time is fast; the petroleum hydrocarbon distribution and concentration information of the polluted area can be quickly obtained by using the present application, thereby providing accurate data support for soil remediation.

[0024] 4、The present application solves the mutual interference problem caused by the existing detection means, and has higher detection precision and smaller detection error. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a front view of the field petroleum hydrocarbon pollutant fluorescence in-situ monitoring device of the present application.

[0026] Figure 2 It is a back view of the field petroleum hydrocarbon pollutant fluorescence in-situ monitoring device of the present application.

[0027] Figure 3 It is a cross-sectional view of the field petroleum hydrocarbon pollutant fluorescence in-situ monitoring device of the present application.

[0028] Figure 4 It is a structural schematic view of the vibrator of the present application.

[0029] Figure 5 It is an internal schematic view of the vibrator of the present application.

[0030] Figure 6 It is a connection schematic view of the vibration shell, the machine shell and the transition shell of the present application.

[0031] Figure 7 It is a structural schematic view of the lens assembly of the present application. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0033] In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for description purposes, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Embodiment

[0035] The field petroleum hydrocarbon pollutant fluorescence in-situ monitoring method comprises the following steps:

[0036] The field petroleum hydrocarbon pollutant fluorescence in-situ monitoring device is used to first make holes at the site to be detected, and then the detection window of the field petroleum hydrocarbon pollutant fluorescence in-situ monitoring device is controlled to reach a specified depth. According to actual detection needs, the petroleum hydrocarbon pollutants in the soil at the specified depth can be detected at different depths. Embodiment

[0037] Based on Embodiment 1, as shown in Figures 1-3 The field petroleum hydrocarbon pollutant fluorescence in-situ monitoring device comprises a vibrator, the vibrator comprises a vibration shell 10, a vibration head 11 located at the lower part of the vibration shell 10, a main shaft 13 located inside the vibration shell 10, a plurality of sets of eccentric blocks 14 installed outside the main shaft 13, two sets of wing plates 12 symmetrically installed outside the vibration shell 10, the main shaft 13 is driven to rotate by a motor or a hydraulic motor, and the wing plates 12 are arranged along the axial direction of the vibration shell 10; two sets of arc-shaped structure machine housings 20 are further arranged outside the vibration shell 10, the upper and lower ends of the machine housing 20 are respectively connected with a transition shell 21, the two transition shells 21 are arranged in axial symmetry, the outer side wall of the transition shell 21 is a conical surface structure, the tail end of the transition shell 21 is fixedly connected with the machine housing 20, and the thickness of the tail end of the transition shell 21 is greater than the thickness of the head end of the transition shell 21; one of the machine housings 20 is provided with a detection window 22 in the central part of the outer side wall; the two machine housings 20 are respectively located between the two wing plates 12, an instrument containing cavity is arranged between the machine housing 20 and the vibration shell 10, and a fluorescence in-situ detection mechanism for detecting petroleum hydrocarbon pollutants is arranged in the instrument containing cavity.

[0038] Firstly, the vibrator has strong hole-making capability and can quickly make holes. After hole-making, the vibrator can also clean the holes. It is very suitable for the field rapid detection of the field petroleum hydrocarbon pollutant described in the present application. Figure 4 , 5As shown, the structure of the existing vibrator includes a shell 10, a vibration head 11 at the lower part of the shell 10, a main shaft 13 inside the shell 10, a plurality of sets of eccentric blocks 14 mounted outside the main shaft 13, and two sets of wing plates 12 symmetrically mounted outside the shell 10, the main shaft 13 is driven to rotate by a motor or a hydraulic motor, and the wing plates 12 are arranged along the axial direction of the shell 10; when the motor or the hydraulic motor drives the main shaft 13 to rotate, the eccentric blocks 14 are synchronously driven to rotate, thereby generating eccentric excitation force to complete the vibration and hole making operation. There are several spray holes at the vibration head 11, which can be used for water and gas spraying. One of the wing plates 12 is a water channel plate for water flow, and the other wing plate 12 is a gas channel plate for gas flow.

[0039] The present application optimizes the structure of the existing vibrator by setting a shell 20 and a transition shell 21, which forms an instrument containing cavity with the original shell 10, which is mainly used to contain the related equipment and instruments of the fluorescent in-situ detection mechanism.

[0040] The two transition shells 21 are of the structure of "small at the top and large at the bottom" first and then "large at the top and small at the bottom", so that the vibration resistance of the vibrator in the up-down vibration is not much different from that of the existing vibrator. It is filled between the two wing plates 12 to maximize the use of space. The other two instrument containing cavities are sufficient to contain the related equipment and instruments of the fluorescent in-situ detection mechanism, and the related cables can use the original cable channels at the two wing plates 12.

[0041] In addition, it should be noted that the total weight of the two shells 20 must be balanced, therefore, a lighter shell 20 needs to be selected, and a counterweight is arranged in the instrument containing cavity in the shell 20.

[0042] The vibrator performs hole making, hole cleaning and other operations at the detection site. Embodiment

[0043] Based on embodiment 2, the principle of the fluorescent in-situ detection mechanism for detecting petroleum hydrocarbon pollutants in soil is as follows:

[0044] The fluorescent in-situ detection mechanism further includes a fluorescent excitation module, a fluorescent detection module, a photomultiplier module, and a signal processing module, the fluorescent excitation module emits ultraviolet light with a wavelength of 270-320 nm (different wavelengths can be emitted by setting different ultraviolet LED lamp beads as needed), the ultraviolet light with a wavelength of 270-320 nm is focused and irradiated to the soil outside the detection window 22 through the lens assembly, and the fluorescent light is excited, the preprocessed fluorescent light is obtained after the fluorescent light is focused, the photomultiplier module, and the filter after the lens assembly of the detection window 22.

[0045] When the pre-treatment fluorescence contains the fluorescence signal with the wavelength of 350-450 nm, the fluorescence signal with the wavelength of 350-450 nm is perceived by the fluorescence detection module which is used to detect the fluorescence signal with a fixed wavelength; the fluorescence signal is converted into an electric signal and transmitted to the signal processing module, the signal processing module processes the electric signal and transmits it to the processor on the ground, and the detection is completed.

[0046] For example, the concentration of petroleum hydrocarbon is positively correlated with the fluorescence intensity thereof, a model of the concentration of petroleum hydrocarbon is established by using a sample with a known concentration of petroleum hydrocarbon, so that the concentration of petroleum hydrocarbon in soil can be effectively detected. The related detection technology and principle are prior art and can be seen from the description of the background art, which will not be described in detail in the embodiment. Embodiment

[0047] As shown in Figure 6 , 7 , the fluorescence in-situ detection mechanism includes a lens assembly at the detection window 22, the lens assembly includes a convex lens 31, a concave lens 32, a light shielding plate 33 for sealing the upper and lower ends of the convex lens 31 and the concave lens 32, a containing chamber 34 is formed between the convex lens 31, the concave lens 32 and the light shielding plate 33, the containing chamber 34 is filled with a refractive liquid, and the convex lens 31 is located outside the detection window 22.

[0048] In order to ensure the sensitivity and accuracy of fluorescence detection, the convex lens 31 is preferably quartz glass.

[0049] First, in an ideal case, the lens assembly should be arc glass or plane glass. However, in actual use, since it is necessary to measure at different depths for many times, although the vibrator is lifted out each time, when it falls into the hole in the soil, it is still unavoidable that the upper and lower soils may cause interference. Therefore, the soil on the surface of the lens assembly must be cleaned again. Usually, the following method is used:

[0050] A plurality of water spray holes are arranged at the connection between the detection window 22 and the tail end of the transition shell 21, the aperture of the water spray hole is less than 2 mm, and the spray direction of the water spray hole is aligned with the outer side wall of the convex lens 31; the inside of the transition shell 21 is provided with a water channel one which is in communication with the water spray hole. Wherein, the water channel one and the water channel two are in communication, and the high-pressure water with a pressure of 4-8 MPa is introduced. The aperture of the water spray hole cannot be too large, otherwise the cleaning effect on the outer side wall of the convex lens 31 will be poor.

[0051] The jet sprayed at the water spraying hole can clean the outer side wall of the convex lens 31, and if the convex lens 31 is replaced by a flat glass, a large middle area of the flat glass has a cleaning dead angle and cannot be cleaned completely. If an arc-shaped glass plate is used, the central area of the arc-shaped glass plate also has a cleaning dead angle and cannot be cleaned completely.

[0052] In the application, the outer side wall of the convex lens 31 is in a spherical cap structure, the central angle corresponding to the cross section of the outer side wall of the convex lens 31 is δ, and 1°≤δ≤9°; the taper angle corresponding to the outer side wall of the transition shell 21 is γ, and γ=(5~6)δ.

[0053] The spherical cap structure makes the jet sprayed at the water spraying hole be able to clean the outer side wall of the convex lens 31, and a large middle area of the convex lens 31 does not have a cleaning dead angle and can be cleaned completely and cleanly.

[0054] Convex lens outer side wall cleaning test

[0055] First, smear a layer of mud on the outer side wall of the convex lens, and the water pressure at the water spraying hole is 7MPa; spray and clean for 1~10min, and observe whether there are clear mud points and mud blocks on the outer side wall of the convex lens. If the total number of mud points and mud blocks (with an area of not more than 3mm 2 ) exceeds 3, it is determined that the cleaning is not complete.

[0056] Change the value of δ, γ=5δ, and the results obtained according to the convex lens outer side wall cleaning test are shown in Table 1:

[0057] Table 1

[0058]

[0059] Therefore, preferably, δ=7.1°, and γ=35.5°.

[0060] The taper angle corresponding to the outer side wall of the transition shell 21 needs to be in a certain proportional relationship with the central angle corresponding to the cross section of the outer side wall of the convex lens, so as to be more in line with fluid mechanics, not only to minimize the wear of the outer side wall of the convex lens, but also to be more suitable for water flow to maximize impact, so as to wash the mud points and soil attached thereto completely. Embodiment

[0061] Because the convex lens 31 and the concave lens 32 are combined, the light can be transmitted better without being deflected too much.

[0062] The refractive liquid is composed of peony seed oil, sea buckthorn seed oil and tetrahydrofuran according to a mass ratio of 2.3:1:(0.5-0.6), for example, the optimal ratio is 2.3:1:0.55.The refractive index of the refractive liquid ranges from 1.475 to 1.552, which is larger than that of fused quartz glass (1.458-1.459). The transmittance of the rough ground quartz glass in the 250-500 nm spectral range can be increased from less than 20% to more than 95% after being filled with the refractive liquid; the refractive index precision increases / decreases by no more than 2% after being stored for 8 months, and the stability is high. The transmittance of the rough ground quartz glass in the 250-500 nm spectral range is less than 20%, and the transmittance in the 250-500 nm spectral range is more than 95% after being filled with the refractive liquid. The outer wall of the convex lens is equivalent to the rough ground quartz glass after long-term use. Therefore, the optical distortion between the convex lens 31 and the concave lens 32 can be effectively corrected by filling the interlayer with the refractive liquid.

[0063] The most important components of the refractive liquid are peony seed oil and sea buckthorn seed oil. If other common oils such as soybean oil and peanut oil are used, the refractive index range will change regardless of the ratio. Moreover, the most important effect is that the transmittance in the 250-500 nm spectral range cannot be improved to more than 95%, and at most can only reach 53%.

[0064] The addition of tetrahydrofuran is mainly to make the whole system of the refractive liquid more stable, so that the refractive index precision is not affected after being stored for 8 months. If tetrahydrofuran is replaced by ethanol, the transmittance in the 250-500 nm spectral range can at most reach 67%, and the refractive index precision decreases by more than 13% after being stored for 1 month, so the stability is poor.

[0065] According to experiments, if the convex lens 31 is replaced by a plane glass, the refractive liquid does not need to be filled.

[0066] In the above embodiment, the method for in-situ fluorescence monitoring of petroleum hydrocarbon pollutants in a site can realize rapid detection of petroleum hydrocarbon pollutants in a contaminated site, especially in the vertical direction.

[0067] The vibrator is used for pore forming construction, and the pore forming rate is fast and the construction efficiency is high. In addition, the vibrator can also be used for hole cleaning operation, and the implementation effect is good, and the complex soil sampling process is avoided.

[0068] The present application directly detects the petroleum hydrocarbon pollutants in the deep soil in-situ, and the detection time is fast. The present application can quickly obtain the petroleum hydrocarbon distribution and concentration information of the contaminated area, thereby providing accurate data support for soil remediation.

[0069] The present application solves the mutual interference problem caused by the existing detection means, and has higher detection precision and smaller detection error.

[0070] The above descriptions are only the preferred embodiment of the application, not intended to limit the application and any modification, equivalent replacement and improvement made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A site-specific fluorescent in-situ monitoring device for petroleum hydrocarbon pollutants, characterized in that, The device includes a vibratory impactor, which comprises a vibratory housing (10), a vibratory head (11) located at the lower part of the vibratory housing (10), a main shaft (13) located inside the vibratory housing (10), multiple sets of eccentric blocks (14) installed outside the main shaft (13), and two sets of wing plates (12) symmetrically installed outside the vibratory housing (10). The main shaft (13) is driven to rotate by a motor or a hydraulic motor, and the wing plates (12) are arranged along the axial direction of the vibratory housing (10). Two sets of arc-shaped housings (20) are also provided outside the vibratory housing (10), and transition housings (21) are respectively connected to the upper and lower ends of the housings (20). Two transition shells (21) are arranged symmetrically. The outer wall of the transition shell (21) is a conical structure. The tail end of the transition shell (21) is fixedly connected to the housing (20). The thickness of the tail end of the transition shell (21) is greater than the thickness of the head end of the transition shell (21). A detection window (22) is provided in the center of the outer wall of one of the housings (20). The two housings (20) are located between the two wing plates (12). An instrument receiving cavity is provided between the housing (20) and the vibrating shell (10). A fluorescent in-situ detection mechanism for detecting petroleum hydrocarbon pollutants is provided in the instrument receiving cavity. The fluorescence in situ detection mechanism includes a lens assembly located at the detection window (22). The lens assembly includes a convex lens (31), a concave lens (32), and a light-shielding plate (33) used to seal the upper and lower ends of the convex lens (31) and the concave lens (32). A receiving chamber (34) is formed between the convex lens (31), the concave lens (32), and the light-shielding plate (33). The receiving chamber (34) is filled with a refractive liquid. The convex lens (31) is located outside the detection window (22). The outer wall of the convex lens (31) is a spherical cap structure, and the central angle corresponding to the cross-section of the outer wall of the convex lens (31) is δ, 1°≤δ≤9°; the cone angle corresponding to the outer wall of the transition shell (21) is γ, γ=(5~6)δ; The refractive liquid is composed of peony seed oil, sea buckthorn seed oil, and tetrahydrofuran in a mass ratio of 2.3:1:(0.5~0.6). δ=7.1°, γ=35.5°; The aforementioned site petroleum hydrocarbon pollutant fluorescence in situ monitoring device is used to first create a hole at the site to be tested, and then the detection window of the site petroleum hydrocarbon pollutant fluorescence in situ monitoring device is controlled to reach a specified depth to detect petroleum hydrocarbon pollutants in the soil at the specified depth.

2. The in-situ fluorescence monitoring device for petroleum hydrocarbon pollutants according to claim 1, characterized in that: One of the instrument housings also contains a counterweight.

3. The in-situ fluorescence monitoring device for petroleum hydrocarbon pollutants according to claim 1, characterized in that: Multiple water spray holes are provided at the connection between the detection window (22) and the tail end of the transition shell (21). The diameter of the water spray holes is less than 2 mm, and the spray direction of the water spray holes is aligned with the outer wall of the convex lens (31). A water channel connected to the water spray holes is provided inside the transition shell (21).

4. The in-situ fluorescence monitoring device for petroleum hydrocarbon pollutants according to claim 1, characterized in that: The fluorescence in situ detection mechanism also includes a fluorescence excitation module, a fluorescence detection module, a photomultiplication module, and a signal processing module. The fluorescence excitation module emits ultraviolet light with a wavelength of 270~320nm. After being focused, the ultraviolet light with a wavelength of 270~320nm passes through a lens assembly and irradiates the soil outside the detection window (22) and excites fluorescence. After passing through the lens assembly at the detection window (22), the fluorescence is focused, photomultiplication module, and filtered to obtain pre-processed fluorescence. When the pre-processed fluorescence contains fluorescence signals with wavelengths of 350~450nm, the fluorescence detection module senses the fluorescence signals, converts them into electrical signals, and transmits them to the signal processing module. The signal processing module processes the electrical signals and transmits them to the processor on the ground to complete the detection.

5. The in-situ fluorescence monitoring device for petroleum hydrocarbon pollutants according to claim 1, characterized in that: The vibratory punch performs hole-making operations at the site to be tested.

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