Fluorescent portable oil detector

Abstract

The utility model relates to a fluorescence portable oil measuring instrument, including sampling module, extraction module and detection module, the sampling module includes solvent pump and water sample pump, solvent pump inlet is communicated with solvent through solvent liquid inlet pipe, the solvent liquid inlet pipe is equipped with solvent liquid inlet valve, the water sample pump inlet is communicated with water sample through water sampling pipe; the extraction module comprises a stirring tank and an extraction separation tank which are arranged up and down, magnetons are arranged in the stirring tank, the stirring tank is communicated with the extraction separation tank through an extract liquid storage pipe, the lower end of the extraction separation tank is communicated with a liquid discharge pipe, and the lower end of the liquid discharge pipe is connected with a water discharge pipe and a water discharge valve; the detection module comprises a sample pool and a spectrograph, a light source is arranged on the sample pool, and a receiving end of the spectrograph is arranged at one end of the sample pool which forms an angle of 90 degrees with incident light of the light source; the device integrates sample introduction, stirring extraction, separation and measurement, and is convenient to operate and short in measurement time.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental monitoring instruments, in particular to a fluorescent portable oil measuring instrument. Background Art

[0002] Detecting petroleum in seawater is a key indicator of seawater testing. Currently, there are three methods for detecting petroleum in seawater. One is the ultraviolet spectrophotometric method, as specified in the environmental standard HJ970-2018, "Water Quality - Determination of Petroleum." The second is the gravimetric method, which is not suitable for accurate measurements due to its large error. The third is the fluorescence spectrophotometric method, as specified in the National Standard of the People's Republic of China GB17378.4-2007, "Ocean Monitoring Specifications, Part 4, Analysis of Oils in Seawater." Fluorescence spectrophotometry is an internationally recognized method for ocean monitoring. Fluorescence measurement involves emitting fluorescence at 360 nm from cyclic aromatic hydrocarbons under 310 nm illumination, eliminating interference from other substances and improving measurement accuracy by an order of magnitude compared to UV spectrophotometry. Currently, fluorescence spectrophotometry primarily uses a fluorescence spectrophotometer to measure oil in seawater. In the laboratory, seawater is extracted manually or automatically with petroleum ether. The absorbance of the extract is measured using a fluorescence spectrophotometer, and the oil concentration in the seawater is then calculated. Currently, there is no portable instrument that uses fluorescence to measure seawater. This lightweight, all-in-one oil meter, which integrates automatic sampling, extraction, separation, and measurement, is suitable for field use. It can collect water samples for measurement, or insert the sampling tube directly into seawater for automatic sampling and measurement. This instrument can be used for on-site emergency monitoring or arbitration monitoring, providing timely and accurate test data. Utility Model Content

[0003] The utility model aims to solve the deficiencies of the prior art and provides a fluorescent portable oil measuring instrument.

[0004] The utility model is realized by the following technical scheme, which provides a fluorescent portable oil measuring instrument, including a sampling module, an extraction module and a detection module, wherein the sampling module includes a solvent pump and a water sample pump, the solvent pump inlet is connected to the solvent through a solvent inlet pipe, the solvent inlet pipe is equipped with a solvent inlet valve, and the water sample pump inlet is connected to the water sample through a water sampling pipe; the extraction module includes a stirring tank and an extraction separation tank arranged up and down, a magnet is installed in the stirring tank, the stirring tank and the extraction separation tank are connected through an extraction liquid storage pipe, the lower end of the extraction separation tank is connected to a drain pipe, and the lower end of the drain pipe is connected to a drainage pipe. pipe drain valve; the detection module includes a sample pool and a spectrometer, the sample pool is equipped with a light source, and the receiving end of the spectrometer is installed at one end of the sample pool at 90 degrees to the incident light of the light source; the solvent pump inlet is connected to the extraction liquid storage pipe through the second liquid inlet pipe, the second liquid inlet pipe is equipped with an extraction liquid inlet valve, the solvent pump outlet is connected to the stirring pool through the first liquid outlet pipe, the first liquid outlet pipe is equipped with a solvent outlet valve, the water sample pump outlet is connected to the stirring pool through the water sample pump outlet pipe, the solvent pump outlet is connected to the sample pool through the third liquid outlet pipe, and the third liquid outlet pipe is equipped with a sample pool inlet valve.

[0005] This solution sets up a water sampling tube, which can be used to extract water samples directly from the water area by a water sample pump, or to use a sample collection bottle to add water samples and clean the collection bottle at the same time. It can be used on-site or to collect samples for use in the laboratory. It not only reduces the operating procedures and avoids sampling errors caused by sampling, but also makes the measured water samples more representative. It is also suitable for conventional measurement methods. An extraction separation tank is used to separate solvents and water samples with different densities, making it easier to extract the extract. This solution also has a valve that can be used to control the flow direction of the liquid in the pipeline, which is easy to operate. The spectrometer uses a fiber optic spectrometer with a miniaturized size. The optical path is connected by optical fiber, which reduces the layout structure area of the instrument, makes the instrument miniaturized, and eliminates the errors caused by mechanical grating spectroscopy.

[0006] As an optimization, the lower end of the drainage pipe is connected to an upwardly extending equal liquid level drainage pipe, and the outlet height of the equal liquid level drainage pipe is located at 3 / 5-4 / 5 of the internal height of the stirring tank.

[0007] This keeps the liquid level inside the stirring tank at 3 / 5-4 / 5, ensuring a certain amount of air in the stirring tank, allowing the water sample and petroleum ether to be more fully mixed, thereby improving the extraction efficiency.

[0008] As an optimization, a vent is provided at the upper end of the sample cell, and a sample cell vent valve is mounted on the vent. The vent in this solution is used to exhaust air from the sample cell.

[0009] As an optimization, the solvent pump inlet is connected to a solvent pump vent valve, and the lower end of the sample pool is connected to a sample pool drain valve. Thus, by opening the solvent pump vent valve, the liquid in the sample pool can be discharged from the sample pool drain valve after the test is completed.

[0010] As an optimization, the system also includes a control module, which includes a touchscreen computer. This touchscreen computer features a dedicated GPIO control port, which is electrically connected to the solenoid valve, liquid pump, and magnetic stirring element. This eliminates the need for a CPU control board, reduces circuit structure, and improves reliability. The spectrometer is communicatively connected to the touchscreen computer controller. In this optimized solution, the tablet computer controller controls the valves, liquid pump, and magnetic stirring element, making operation more convenient and reducing operation time.

[0011] As an optimization, the solvent pump outlet is connected to the water sampling tube through a second liquid outlet pipe, and the second liquid outlet pipe is equipped with a cleaning valve. After the test is completed, the solvent is pumped into the water sampling tube to clean the water sampling tube and the water sampling pump.

[0012] As an optimization, the lower end of the drain pipe is connected to a drain pipe waste liquid valve. The drain pipe waste liquid valve in this solution is used to discharge waste liquid during cleaning.

[0013] The beneficial effects of the utility model are:

[0014] (1) Handheld on-site measuring instrument, easy to operate and short measuring time. It integrates sampling, stirring, extraction, separation and measurement.

[0015] (2) The water sample tube is placed directly in the sampling water area, eliminating the need to use a sample bottle to collect water samples, reducing the operation process, eliminating the need to clean the sampling bottle, eliminating the error caused by cleaning the sampling bottle wall, and making the measurement more accurate. The water sample tube is placed in the collection bottle and the sampling bottle is cleaned. There are two working modes, which can be used both on-site and in the laboratory.

[0016] (3) The extraction separation and siphon continuous drainage were developed to solve the problem of sufficient stirring and mixing of liquids of different densities. The separation tank was designed to solve the problem of complete separation of the extract and the water sample, ensuring that the extract was not lost.

[0017] (4) A separation pool is added to the extraction separation column. The solution rotates in the separation pool, which is conducive to the separation of the solvent and the water sample. The solution is not carried away by the wastewater, thus ensuring the accuracy of the measurement.

[0018] (5) A siphon drainage method was designed, which can keep the solvent and water sample in the stirring tank for stirring and extraction, and can also continuously add water sample and continuously discharge the extracted water sample, thus solving the problem of large volume water sample being difficult to extract.

[0019] (6) The continuous water sample extraction method can mix a small amount of water sample with multiple times of solvent, solving the problem of extraction distribution ratio and improving extraction efficiency.

[0020] (7) By adjusting the height of the horizontal tube of the siphon tube, the volume of the water sample and the retention of the solvent in the stirring tank can be guaranteed, while retaining a certain amount of air, so that the water sample can be mixed with more solvent and extracted more fully.

[0021] (8) The spectrometer uses a fiber optic spectrometer with a miniaturized size; the optical path is connected by optical fiber, which reduces the layout area of the instrument and makes the instrument miniaturized. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the working principle diagram of the utility model;

[0023] Figure 2 This is the workflow diagram of the utility model;

[0024] As shown in the figure:

[0025] 11. Solvent inlet pipe, 12. Water sampling pipe, 13. Second inlet pipe, 14. First outlet pipe, 15. Third outlet pipe, 16. Water sample pump outlet pipe, 17. Second outlet pipe, 21. Extraction separation cell, 22. Stirring cell, 23. Drain pipe, 24. Extraction liquid storage pipe, 3. Detection module, 31. Sample cell, 32. Spectrometer, 33. Light source, 34. Standard solution inlet, 41. Touch screen computer, 51. Equal liquid level drain pipe; Sv1. Solvent inlet valve, Sv2. Water sample inlet valve, Sv3. Solvent pump vent valve, Sv4. Extraction liquid inlet valve, Sv5. Solvent outlet valve, Sv6. Sample cell inlet valve, Sv7. Sample cell vent valve, Sv8. Sample cell drain valve, Sv9, drain pipe drain valve, Sv10, drain pipe waste liquid valve, Sv11, cleaning valve, M1, solvent pump, M2, water sample pump, X, magnet. DETAILED DESCRIPTION

[0026] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0027] like Figures 1 and 2 As shown, the utility model is a fluorescent portable oil measuring instrument, which includes a sampling module, an extraction module, a detection module and a control module.

[0028] The sampling module is used to extract water samples and solvents. The sampling module includes a solvent pump M1 and a water sample pump M2. The inlet of the water sample pump M2 is connected to the water sample through a water sampling tube 12. The water sampling tube 12 is equipped with a water sample inlet valve Sv2 for the water sample pump M2 to extract water. The water sampling tube 12 can be connected to a sampling bottle or directly connected to the sampling water area. The inlet of the solvent pump M1 is connected to the solvent through a solvent inlet tube 11. The solvent inlet tube 11 is equipped with a solvent inlet valve Sv1 for the solvent pump M1 to extract the solvent.

[0029] The extraction module is used to stir, mix and separate the solvent and water sample; the extraction module includes a stirring tank 22 and an extraction separation tank 21 arranged up and down, the stirring tank 22 and the extraction separation tank 21 are connected through an extraction liquid storage pipe 24, the extraction liquid storage pipe 24 is arranged vertically, a magnetic particle X is installed in the stirring tank 22, the lower end of the extraction separation tank 21 is connected to a drain pipe 23, and the lower end of the drain pipe 23 is connected to a drain valve Sv9.

[0030] The detection module is used to perform spectral analysis on the extract. The detection module includes a sample cell 31 and a spectrometer 32. The sample cell 31 is equipped with a light source 33. The receiving end of the spectrometer 32 is installed at one end of the sample cell at 90 degrees to the incident light of the light source 33. The 310nm light generated by the light source 33 is connected to the light input end of the sample cell through an optical fiber; the optical path output end of the sample cell in a direction perpendicular to the optical path input end receives 360nm light and is connected to the optical signal input end of the spectrometer through an optical fiber.

[0031] The control module is used to control the solvent pump M1, water sample pump M2, solenoid valve and stirring magnet, and receive the signal of the spectrometer 32 to calculate the concentration of petroleum in the water sample, display the instrument working status and analysis data results. The control module includes a touch screen computer 41.

[0032] All connecting pipes use polytetrafluoroethylene tubes, and the connection methods of each module are as follows:

[0033] The inlet of the solvent pump M1 is connected to the extraction liquid storage pipe 24 through the second liquid inlet pipe 13, and the second liquid inlet pipe 13 is equipped with an extraction liquid inlet valve Sv4.

[0034] The outlet of the solvent pump M1 is connected to the stirring tank 22 through a first liquid outlet pipe 14 , and a solvent outlet valve Sv5 is installed on the first liquid outlet pipe 14 .

[0035] The outlet of the water sample pump M2 is connected to the stirring tank 22 through the water sample pump outlet pipe 16.

[0036] The outlet of the solvent pump M1 is connected to the sample pool 31 through a third liquid outlet pipe 15 , and a sample pool liquid inlet valve Sv6 is installed on the third liquid outlet pipe 15 .

[0037] The lower end of the drainage pipe 23 is connected to an upwardly extending equal liquid level drainage pipe 51. In order to make the liquid level inside the stirring tank 22 at 3 / 5-4 / 5, the outlet height of the equal liquid level drainage pipe 51 is located at 3 / 5-4 / 5 of the internal height of the stirring tank 22. In this embodiment, the outlet height of the equal liquid level drainage pipe 51 is at 4 / 5 of the stirring tank.

[0038] In order to discharge the gas in the sample pool 31, a vent is provided at the upper end of the sample pool 31, and a sample pool vent valve Sv7 is installed on the vent.

[0039] In order to discharge the liquid in the sample pool 31 after the detection is completed, the inlet of the solvent pump M1 is connected to a solvent pump vent valve Sv3, and the lower end of the sample pool 31 is connected to a sample pool drain valve Sv8.

[0040] The outlet of the solvent pump M1 is connected to the water sampling tube 12 through a second liquid outlet pipe 17. A cleaning valve Sv11 is installed on the second liquid outlet pipe 17. The second liquid outlet pipe 17 is connected between the water sample inlet valve Sv2 on the water sampling tube 12 and the water sample.

[0041] The lower end of the drain pipe 23 is connected to a drain pipe waste liquid valve Sv10 for discharging the cleaning waste liquid.

[0042] The use method of this utility model:

[0043] (1) When the measurement is started, the water sample pump M2 draws the water sample through the water sample inlet valve sv2, and then sends the water sample into the stirring tank through the water sample pump outlet pipe 16.

[0044] (2) The solvent pump M1 then extracts a fixed amount of solvent through the solvent inlet valve sv1 and delivers it into the stirring tank 22 through the solvent outlet valve sv5.

[0045] (3) Start the magnetic stirrer and drive the magnet X to rotate. The water sample and the solvent are stirred and mixed by vertical stirring. Liquids of different densities can be fully mixed and the oil in the water sample can be extracted into the solvent.

[0046] (4) When the water sample is continuously fed into the stirring tank 22 by the water sample pump M2, most of the solvent will remain in the stirring tank 22 because of its lower density than water; a small amount of solvent will flow into the separation tank 21 along with the extracted water sample, and the liquid flow will rotate upward along the four sides, and the flow rate will slow down. The solvent will separate from the water and float to the stirring tank 22 after accumulating to a certain volume. The petroleum in the water sample will be completely extracted into the solvent, and the extracted wastewater will continue to flow downward and be discharged through the equal liquid level drain pipe 51.

[0047] (5) When the volume of the extracted water sample reaches the set value or the water sample in the sampling bottle is completely extracted, the water sample pump M2 stops working and the magnet X stops rotating; the liquid is static and stratified, and the petroleum-containing extract will all float to the upper part of the stirring tank 22, and the two parts will have obvious stratification, and the drainage pipe 51 will stop draining when the liquid level is reached.

[0048] (6) Control the drain valve SV9 of the drain pipe to open and allow the separation layer to drop to the upper part of the separation tank.

[0049] (7) Open the extraction liquid inlet valve sv4, the sample pool inlet valve sv6, and the sample pool vent valve sv7, start the solvent pump M1, and draw a certain amount of extraction liquid into the sample pool 31. After completion, stop the solvent pump M1 and close all solenoid valves.

[0050] (8) The spectrometer collects the 360nm fluorescence signal excited by the extract, and sends the signal to the touch screen computer 41 for processing and calculation, and obtains the analysis data results for display and storage.

[0051] (9) Open the solvent pump vent valve sv3, the sample pool liquid inlet valve sv6, and the sample pool drain valve sv8, start the solvent pump M1, and drain the extract liquid in the sample pool 31. After completion, stop the solvent pump and close the solenoid valve.

[0052] (10) After the test is completed, open the solvent inlet valve SV1, the cleaning valve SV11, the water sample inlet valve SV2 and the drain pipe waste valve SV10, pump the solvent into the water sampling tube, and clean the water sampling tube, water sample pump, stirring tank and separation tank.

[0053] In this embodiment, a special organic solvent-resistant pump is used to quickly extract water samples, and the solvent and water sample are sent to the extraction stirring tank for vertical magnetic stirring to fully mix the liquids of different densities of water and solvent. The specially developed and designed extraction and separation device can realize the functions of extraction and separation. The waste water after extraction can be discharged through a siphon, and the extract enters the sample tank for measurement. The fiber optic spectrometer collects the fluorescence signal excited by the extract, and after processing and conversion, it is sent to a touch screen computer for calculation and processing to obtain the concentration of petroleum content in the water.

[0054] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved through or by adopting existing technologies, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A fluorescent portable oil tester, characterized by: The invention comprises a sampling module, an extraction module and a detection module, wherein the sampling module comprises a solvent pump (M1) and a water sample pump (M2), wherein the inlet of the solvent pump (M1) is connected to the solvent through a solvent inlet pipe (11), and a solvent inlet valve (Sv1) is installed on the solvent inlet pipe (11); and the inlet of the water sample pump (M2) is connected to the water sample through a water sampling pipe (12); The extraction module comprises a stirring tank (22) and an extraction separation tank (21) arranged in an upper and lower manner, wherein a magnet (X) is installed in the stirring tank (22), the stirring tank (22) and the extraction separation tank (21) are connected via an extraction liquid storage pipe (24), the lower end of the extraction separation tank (21) is connected to a drain pipe (23), and the lower end of the drain pipe (23) is connected to a drain valve (Sv9); The detection module includes a sample pool (31) and a spectrometer (32), wherein the sample pool (31) is provided with a light source (33), and a receiving end of the spectrometer (32) is installed at one end of the sample pool at a 90-degree angle to the incident light of the light source (33); The inlet of the solvent pump (M1) is connected to the extraction liquid storage tube (24) through the second liquid inlet pipe (13), and the second liquid inlet pipe (13) is equipped with an extraction liquid inlet valve (Sv4). The outlet of the solvent pump (M1) is connected to the stirring tank (22) through the first liquid outlet pipe (14), and the first liquid outlet pipe (14) is equipped with a solvent outlet valve (Sv5). The outlet of the water sample pump (M2) is connected to the stirring tank (22) through the water sample pump outlet pipe (16). The outlet of the solvent pump (M1) is connected to the sample pool (31) through the third liquid outlet pipe (15), and the third liquid outlet pipe (15) is equipped with a sample pool inlet valve (Sv6).

2. A fluorescent portable oil measuring instrument according to claim 1, characterized in that: The lower end of the liquid discharge pipe (23) is connected to an upwardly extending equal liquid level drain pipe (51), and the outlet height of the equal liquid level drain pipe (51) is located at 3 / 5-4 / 5 of the internal height of the stirring tank (22).

3. A fluorescent portable oil measuring instrument according to claim 1, characterized in that: The upper end of the sample pool (31) is provided with a vent, and the vent is equipped with a sample pool vent valve (Sv7).

4. A fluorescent portable oil measuring instrument according to claim 1, characterized in that: The inlet of the solvent pump (M1) is connected to a solvent pump vent valve (Sv3), and the lower end of the sample pool (31) is connected to a sample pool drain valve (Sv8).

5. The fluorescent portable oil measuring instrument according to claim 1, characterized in that: It also includes a control module, which includes a touch screen computer (41).

6. A fluorescent portable oil measuring instrument according to claim 1, characterized in that: The outlet of the solvent pump (M1) is connected to the water sampling tube (12) through a second liquid outlet pipe (17), and a cleaning valve (Sv11) is installed on the second liquid outlet pipe (17).

7. A fluorescent portable oil measuring instrument according to claim 1, characterized in that: The lower end of the drainage pipe (23) is connected to a drainage pipe waste liquid valve (Sv10).

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