A non-contact detection device for oil suspended matter in water based on fluorescence method

Abstract

The present application provides a non-contact oil-in-water suspended matter detection device based on fluorescence method, which belongs to the technical field of oil-in-water suspended matter detection, and specifically includes a fluorescence detector, a flow cell, an excitation light source and an optical filter; a liquid inlet channel is provided on the top of the flow cell, and a liquid outlet channel is provided on the bottom of the flow cell, the liquid inlet channel and the liquid outlet channel of the flow cell are aligned in the vertical direction, and there is a gap between the liquid inlet channel and the liquid outlet channel, and the gap is used as a detection area; the excitation light source is used to emit a laser irradiated on the liquid to be detected in the detection area; the optical filter is used to allow light of a preset wavelength to enter the fluorescence detector through the optical filter; the liquid to be detected enters the liquid inlet channel and is discharged from the liquid outlet channel after passing through the detection area, and the laser irradiates the liquid to be detected to excite fluorescence, and the fluorescence enters the fluorescence detector after passing through the optical filter. The scheme of the present application can reduce secondary pollution in the detection process and improve detection efficiency and accuracy.

Description

Technical Field

[0001] The present application relates to the field of oil suspended matter detection in water, and in particular to a non-contact oil suspended matter detection device in water based on fluorescence method. Background Art

[0002] Water is the source of life. With the rapid development of science and technology in modern society, the importance of water quality testing is increasing, and the testing requirements are also increasing. Along with the exploitation of oil on land and at sea, mineral oil leaks during the process of exploitation, transportation, and processing, causing serious pollution to water bodies and soil. Mineral oil pollution in water is mainly caused by industrial drainage, leakage during oil extraction, etc., so it is very important to monitor the oil content in water. The oil-in-water monitoring device commonly used today has a complex structure and requires complex pretreatment such as extraction and separation of samples. The sampling frequency is low and the test time is long, so the results are difficult to reflect the real data. The maintenance and cleaning of the equipment are troublesome and complicated, and secondary pollution is easy to occur. It has high requirements for the testing environment, and it is impossible to conduct real-time on-site detection in high-risk environments such as petroleum and chemical industries. Summary of the invention

[0003] In view of this, the present application provides a non-contact detection device for oil-suspended matter in water based on the fluorescence method, which solves the problems in the prior art, reduces secondary pollution in the detection process, and improves detection efficiency and accuracy.

[0004] The present application provides a non-contact fluorescence-based oil-suspended matter detection device in water, which adopts the following technical solution:

[0005] A non-contact detection device for oil suspended matter in water based on fluorescence method, comprising:

[0006] A fluorescence detector, wherein a detection window is provided on a first side surface in a vertical direction;

[0007] A flow cell is installed on the first side surface, a liquid inlet channel is provided on the top of the flow cell, a liquid outlet channel is provided on the bottom of the flow cell, the liquid inlet channel and the liquid outlet channel of the flow cell are aligned in the vertical direction, and there is a gap between the liquid inlet channel and the liquid outlet channel, the gap serves as a detection area, and the detection area is aligned with the detection window;

[0008] An excitation light source is installed on the side of the flow cell, and the excitation light source is used to emit laser light to illuminate the liquid to be detected in the detection area;

[0009] A filter, located on the detection window, used to allow light of a preset wavelength to pass through the filter and enter the fluorescence detector;

[0010] The liquid to be detected enters the liquid inlet channel and passes through the detection area and then is discharged from the liquid outlet channel. The laser irradiates the liquid to be detected to excite fluorescence, and the fluorescence passes through the filter and enters the fluorescence detector.

[0011] Optionally, the laser emitted by the excitation light source is perpendicular to the vertical direction and parallel to the first side surface.

[0012] Optionally, a curved concave reflector is provided on a side of the detection area facing away from the detection window, and the curved concave reflector is used to converge part of the fluorescence excited by the detection liquid to the detection window.

[0013] Optionally, the side surfaces in the vertical direction of the flow pool include a first mounting surface docked with the first side surface and a second mounting surface for mounting an excitation light source, and the side surfaces in the vertical direction of the flow pool facing the first mounting surface and the side surfaces facing the second mounting surface are transparent plates.

[0014] Optionally, a slot is provided on the side of the flow pool facing the second mounting surface and close to the first side, and a plug plate is provided in the slot which slides along the slot, and the plug plate slides in a direction perpendicular to the second mounting surface, and the plug plate is inserted into one end of the flow pool to detachably install the filter.

[0015] Optionally, a positioning protrusion is provided at one end of the plug plate away from the filter, and when the positioning protrusion abuts against the transparent plate, the filter faces the detection window.

[0016] Optionally, a step hole is provided on the second mounting surface, and the large diameter end of the step hole is located on the side away from the detection area. An optical lens is provided in the step hole, and the optical lens matches the large diameter end of the step hole. After the excitation light source is installed on the second mounting surface, the emitting end surface of the excitation light source presses the optical lens in the step hole. The excitation light source is detachably mounted on the second mounting surface, and the laser emitted by the excitation light source passes through the optical lens and the step hole to reach the detection area.

[0017] Optionally, the liquid inlet channel includes, from top to bottom, a first section, a second section, a third section and a fourth section which are interconnected, the inner diameter of the first section is consistent, the second section, the third section and the fourth section are tapered holes, the inner diameter of the top end of the second section is consistent with the inner diameter of the first section, the inner diameter of the bottom end of the second section is smaller than the inner diameter of the first section, the inner diameter of the top end of the third section is smaller than the inner diameter of the bottom end of the second section, the inner diameter of the bottom end of the third section is smaller than the inner diameter of the top end of the third section, the inner diameter of the top end of the fourth section is smaller than the inner diameter of the bottom end of the third section, and the inner diameter of the bottom end of the fourth section is smaller than the inner diameter of the top end of the fourth section.

[0018] Optionally, the liquid outlet channel includes a receiving hole and a diffusion hole that are interconnected, the receiving hole has a consistent inner diameter, the receiving hole is located at the top of the liquid outlet channel, the inner diameter of the receiving hole is larger than the inner diameter of the bottom outlet of the liquid inlet channel, the diffusion hole is located below the receiving hole, the inner diameter of the top of the diffusion hole is consistent with the inner diameter of the receiving hole, and the inner diameter of the diffusion hole gradually increases from top to bottom.

[0019] In summary, this application includes the following beneficial technical effects:

[0020] It provides a more convenient monitoring device for oil in water detection, which can be used in harsh environments such as land and offshore oil extraction, mineral oil transportation, processing, etc., for oil leakage monitoring in water. It has a simple structure, is easy to use and process, has no secondary pollution, is easy to clean, and can replace optical lenses and filters at any time. It has high reaction efficiency, fast analysis, does not require other extraction agents, and is used for on-site operations.

[0021] The excitation light source and the fluorescence detector do not contact the liquid to be tested, thus avoiding contamination of the optical window and generating no secondary contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of a non-contact detection device for oil suspended matter in water based on fluorescence method;

[0024] Figure 2 This is a schematic diagram of the explosion structure of the non-contact detection device for oil suspended matter in water based on the fluorescence method of this application;

[0025] Figure 3 This is a schematic diagram of the structure of the liquid inlet channel and the liquid outlet channel of this application;

[0026] Figure 4 This is a schematic diagram of the installation structure of the optical lens of this application.

[0027] Explanation of the reference numerals: 1. fluorescence detector; 11. first side; 12. detection window; 2. flow cell; 21. liquid inlet channel; 22. first section; 23. second section; 24. third section; 25. fourth section; 26. liquid outlet channel; 27. receiving hole; 28. diffusion hole; 3. excitation light source; 4. filter; 41. plug-in plate; 42. positioning bump; 43. slot; 5. arc-shaped concave reflector; 6. transparent plate; 61. first mounting surface; 62. second mounting surface; 7. step hole; 71. optical lens; 8. cover plate; 81. liquid inlet. DETAILED DESCRIPTION

[0028] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0029] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0030] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0031] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show the components related to the present application rather than being drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0032] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0033] The embodiment of the present application provides a non-contact detection device for oil-suspended matter in water based on fluorescence method.

[0034] like Figures 1 to 3 As shown, a non-contact detection device for oil suspended matter in water based on fluorescence method comprises:

[0035] The fluorescence detector 1 has a detection window 12 on a first side surface 11 in a vertical direction.

[0036] The flow pool 2 is installed on the first side surface 11, and a liquid inlet channel 21 is provided at the top of the flow pool 2, and a liquid outlet channel 26 is provided at the bottom of the flow pool 2. The liquid inlet channel 21 and the liquid outlet channel 26 of the flow pool 2 are aligned in the vertical direction, and there is a gap between the liquid inlet channel 21 and the liquid outlet channel 26. The gap serves as a detection area, and the detection area and the detection window 12 are aligned.

[0037] The excitation light source 3 is installed on the side of the flow cell 2. The excitation light source 3 emits a laser for irradiating the liquid to be detected in the detection area. The laser wavelength emitted by the excitation light source 3 in the embodiment of the present application is in the 255nm band.

[0038] The filter 4 is located on the detection window 12 and is used to allow light of a preset wavelength to pass through the filter 4 and enter the fluorescence detector 1; the filter 4 of the embodiment of the present application can allow light with a wavelength of 280 nm to pass through.

[0039] Among them, the liquid to be detected enters the liquid inlet channel 21 and is discharged from the liquid outlet channel 26 after passing through the detection area. The laser irradiates the liquid to be detected to excite fluorescence. The fluorescence is filtered by the filter 4 to allow the required light to enter the fluorescence detector 1. The fluorescence detector 1 analyzes the received light and quantitatively analyzes the oil concentration through fluorescence spectrophotometry based on the fluorescence intensity emitted by aromatic hydrocarbon compounds and conjugated double bond compounds in petroleum and its products after absorbing ultraviolet light, thereby obtaining water quality detection results.

[0040] The laser emitted by the excitation light source 3 is perpendicular to the vertical direction and parallel to the first side surface 11. The water flow through the liquid inlet channel 21 faces the detection window 12. After the laser emitted by the excitation light source 3 irradiates the fluid to be detected, the fluid emits fluorescence in all directions.

[0041] The detection area is provided with an arc-shaped concave reflector 5 on the side facing away from the detection window 12, and the arc-shaped concave reflector 5 is used to converge part of the fluorescence excited by the detection liquid through the filter 4 and reach the light receiver on the fluorescence detector 1, thereby increasing the amount of light entering the fluorescence detector 1 and improving the accuracy of the detection result. The arc-shaped concave reflector 5 is installed in the side wall of the flow cell 2 away from the first side surface 11.

[0042] The side surface of the flow pool 2 in the vertical direction includes a first mounting surface 61 docked with the first side surface 11, and a second mounting surface 62 for mounting the excitation light source 3. The side surface of the flow pool 2 in the vertical direction facing the first mounting surface 61 and the side surface facing the second mounting surface 62 are transparent plates 6. The edges of the transparent plates 6 are connected to the top and bottom of the flow pool 2 by bolts. The two sides of the flow pool 2 are transparent, which is convenient for personnel to observe the internal situation of the flow pool 2.

[0043] A slot 43 is provided on the side of the flow pool 2 facing the second mounting surface 62 and close to the first side 11. A plug plate 41 is provided in the slot 43 and slides along the slot 43. The plug plate 41 slides in a direction perpendicular to the second mounting surface 62. The plug plate 41 is inserted into one end of the flow pool 2 to detachably install the filter 4. The filter 4 can be replaced and cleaned in time, reducing secondary pollution and improving the accuracy of the detection result.

[0044] A positioning protrusion 42 is provided at one end of the plug plate 41 away from the optical filter 4. When the positioning protrusion 42 abuts against the transparent plate 6, the optical filter 4 faces the detection window 12. The positioning protrusion 42 ensures the position accuracy of the optical filter 4 each time the optical filter 4 is installed. In one embodiment, a groove for accommodating the positioning protrusion 42 is provided on the transparent plate 6 so that the positioning boss is flush with the transparent outer surface.

[0045] like Figure 4 As shown, a step hole 7 is provided on the second mounting surface 62, and the large diameter end of the step hole 7 is located on the side away from the detection area. An optical lens 71 is provided in the step hole 7, and the optical lens 71 matches the large diameter end of the step hole 7. After the excitation light source 3 is installed on the second mounting surface 62, the emitting end face of the excitation light source 3 presses the optical lens 71 in the step hole 7, and the excitation light source 3 is detachably installed on the second mounting surface 62. The optical lens 71 is a plane lens, and the optical lens 71 can be replaced by disassembling the excitation light source 3, which is convenient for timely cleaning of the optical lens 71, reduces secondary pollution, and improves the accuracy of the detection result. Among them, the excitation light source 3 is installed on the second mounting surface 62 by bolts, and the laser emitted by the excitation light source 3 passes through the optical lens 71 and the step hole 7 to reach the detection area.

[0046] like Figure 3As shown, the liquid inlet channel 21 includes, from top to bottom, the first section 22, the second section 23, the third section 24 and the fourth section 25, which are interconnected. The inner diameter of the first section 22 is consistent. The second section 23, the third section 24 and the fourth section 25 are tapered holes. The inner diameter of the top of the second section 23 is consistent with the inner diameter of the first section 22. The inner diameter of the bottom of the second section 23 is smaller than the inner diameter of the first section 22. The inner diameter of the top of the third section 24 is smaller than the inner diameter of the bottom of the second section 23. The inner diameter of the bottom of the third section 24 is smaller than the inner diameter of the top of the third section 24. The inner diameter of the top of the fourth section 25 is smaller than the inner diameter of the bottom of the third section 24. The inner diameter of the bottom of the fourth section 25 is smaller than the inner diameter of the top of the fourth section 25. The liquid inlet channel 21 gradually narrows to form a graded contraction hole. Pressurization is performed layer by layer to achieve laminar flow, reduce the splashing of the liquid to be detected in the detection area, and thus improve the detection accuracy.

[0047] The liquid outlet channel 26 includes a receiving hole 27 and a diffusion hole 28 that are interconnected. The receiving hole 27 has the same inner diameter. The receiving hole 27 is located at the top of the liquid outlet channel 26. The inner diameter of the receiving hole 27 is larger than the inner diameter of the bottom outlet of the liquid inlet channel 21. The diffusion hole 28 is located below the receiving hole 27. The inner diameter of the top of the diffusion hole 28 is consistent with the inner diameter of the receiving hole 27. The inner diameter of the diffusion hole 28 gradually increases from top to bottom. The purpose of the diffusion hole 28 is to prevent the detected solution from splashing around during the discharge process.

[0048] In the embodiment of the present application, a cover plate 8 is provided at the top of the flow cell 2, and a liquid inlet 81 for connecting an external conduit is provided on the cover plate 8, and a conduit connected to the liquid outlet channel 26 is provided at the bottom of the flow cell 2. The operation process of the non-contact oil-suspended matter detection device in water based on the fluorescence method of the present application is as follows: insert the filter 4 into the flow cell 2, and after the installation is completed, the liquid to be tested is input into the liquid inlet channel 21 through the conduit at the top of the flow cell 2, and the waste liquid flows out from the conduit at the bottom of the flow cell 2 through the liquid outlet channel 26, and the fluorescence detector 1 and the excitation light source 3 device are turned on. After use, the waste liquid at the bottom of the flow cell 2 is first discharged, and then the conduit at the top of the flow cell 2 is removed.

[0049] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A non-contact detection device for oil-suspended matter in water based on fluorescence method, characterized in that: include: A fluorescence detector (1), wherein a detection window (12) is provided on a first side surface (11) in a vertical direction; A flow pool (2) is mounted on the first side surface (11), a liquid inlet channel (21) is provided at the top of the flow pool (2), and a liquid outlet channel (26) is provided at the bottom of the flow pool (2), the liquid inlet channel (21) and the liquid outlet channel (26) of the flow pool (2) are aligned in the vertical direction, and there is a gap between the liquid inlet channel (21) and the liquid outlet channel (26), the gap serves as a detection area, and the detection area and the detection window (12) are aligned, the liquid inlet channel (21) includes, from top to bottom, a first section (22), a second section (23), a third section (24) and a fourth section (25) which are interconnected, the first section (22) has the same inner diameter, the second section (23), the third section (24) and the fourth section (25) are tapered holes, the inner diameter of the top end of the second section (23) is the same as the inner diameter of the first section (22), and the inner diameter of the bottom end of the second section (23) is smaller than that of the first section (22). The inner diameter of the first section (22) is smaller than the inner diameter of the bottom end of the second section (23), the inner diameter of the bottom end of the third section (24) is smaller than the inner diameter of the top end of the third section (24), the inner diameter of the top end of the fourth section (25) is smaller than the inner diameter of the bottom end of the third section (24), the inner diameter of the bottom end of the fourth section (25) is smaller than the inner diameter of the top end of the fourth section (25), and the liquid outlet channel (26) includes receiving holes (22) that are interconnected. 7) and a diffusion hole (28), the inner diameters of the receiving hole (27) are consistent, the receiving hole (27) is located at the top of the liquid outlet channel (26), the inner diameter of the receiving hole (27) is greater than the inner diameter of the bottom outlet of the liquid inlet channel (21), the diffusion hole (28) is located below the receiving hole (27), the inner diameter of the top of the diffusion hole (28) is consistent with the inner diameter of the receiving hole (27), and the inner diameter of the diffusion hole (28) gradually increases from top to bottom; An excitation light source (3) is installed on a side of the flow cell (2), and the excitation light source (3) is used to emit laser light to illuminate the liquid to be detected in the detection area; A filter (4) located on the detection window (12) and used to allow light of a preset wavelength to pass through the filter (4) and enter the fluorescence detector (1); The liquid to be detected enters the liquid inlet channel (21) and is discharged from the liquid outlet channel (26) after passing through the detection area. The laser irradiates the liquid to be detected to excite fluorescence, and the fluorescence passes through the filter (4) and enters the fluorescence detector (1).

2. The non-contact detection device for oil-suspended matter in water based on fluorescence method according to claim 1 is characterized in that: The laser light emitted by the excitation light source (3) is perpendicular to the vertical direction and parallel to the first side surface (11).

3. The non-contact detection device for oil-suspended matter in water based on fluorescence method according to claim 2 is characterized in that: A curved concave reflector (5) is provided on the side of the detection area facing away from the detection window (12), and the curved concave reflector (5) is used to converge part of the fluorescence excited by the detection liquid to the detection window (12).

4. The non-contact detection device for oil-suspended matter in water based on fluorescence method according to claim 1 is characterized in that: The side surfaces of the flow pool (2) in the vertical direction include a first mounting surface (61) connected to the first side surface (11) and a second mounting surface (62) for mounting an excitation light source (3); the side surfaces of the flow pool (2) in the vertical direction facing the first mounting surface (61) and the side surfaces facing the second mounting surface (62) are transparent plates (6).

5. The non-contact detection device for oil-suspended matter in water based on fluorescence method according to claim 4 is characterized in that: A slot (43) is provided on the side of the flow pool (2) facing the second mounting surface (62) and close to the first side (11); a plug plate (41) is provided in the slot (43) and slides along the slot (43); the plug plate (41) slides in a direction perpendicular to the second mounting surface (62); the plug plate (41) is inserted into one end of the flow pool (2) to detachably mount the filter (4).

6. The non-contact detection device for oil-suspended matter in water based on fluorescence method according to claim 5 is characterized in that: A positioning protrusion (42) is provided at one end of the plug plate (41) away from the optical filter (4); when the positioning protrusion (42) abuts against the transparent plate (6), the optical filter (4) faces the detection window (12).

7. The non-contact detection device for oil-suspended matter in water based on fluorescence method according to claim 4 is characterized in that: A step hole (7) is provided on the second mounting surface (62), and the large diameter end of the step hole (7) is located on the side away from the detection area. An optical lens (71) is provided in the step hole (7), and the optical lens (71) matches the large diameter end of the step hole (7). After the excitation light source (3) is installed on the second mounting surface (62), the emitting end surface of the excitation light source (3) presses the optical lens (71) into the step hole (7). The excitation light source (3) is detachably installed on the second mounting surface (62), and the laser emitted by the excitation light source (3) passes through the optical lens (71) and the step hole (7) and reaches the detection area.

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