CN103257117A - Rapid gasoline component measurement system - Google Patents
Rapid gasoline component measurement system Download PDFInfo
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- CN103257117A CN103257117A CN2013100578498A CN201310057849A CN103257117A CN 103257117 A CN103257117 A CN 103257117A CN 2013100578498 A CN2013100578498 A CN 2013100578498A CN 201310057849 A CN201310057849 A CN 201310057849A CN 103257117 A CN103257117 A CN 103257117A
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Abstract
The invention discloses a rapid gasoline component measurement system, which comprises an injector, a sample cell, a fourier transform infrared spectrometer and a computer, wherein a liquid inlet and a liquid outlet of the sample cell are respectively connected with a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is provided with a three-way valve, the liquid outlet pipe is provided with a one-way valve along a liquid outlet direction, a pipeline cross section between the injector and the three-way valve is fixedly provided with a filtration film, the end of the liquid outlet pipe is connected with a waste liquid barrel, and the fourier transform infrared spectrometer and the computer are connected through a network line. With the system, applications of infrared absorption spectrum quantitative and qualitative detection in chemical industry fields are improved, rapid development of the fourier transform infrared spectrometer in the field of petrochemical industry detection is promoted, the measurement method is simple, time consumption is short, and measurement accuracy is high.
Description
Technical field
The present invention relates generally to environment, petrochemical industry detection technique and analysis and optical technical field, relates in particular to a kind of system of quick MEASUREMENT OF STEAM oil component.
Background technology
Fourier transform infrared spectroscopy (FTIR) instrument is because high sensitivity and resolution, and special advantages such as can carry out that real-time polycomponent is surveyed simultaneously, all be widely used at aspects such as environment, chemistry, materials, in recent years especially aspect qualitative, quantitative monitorings such as gas, liquid.
Along with increasing sharply of China's car owning amount, the environmental pollution that brings in the automobilism is more and more serious.The hydrocarbon composition method for measuring mainly contains fluorescent indicator adsorption method (FIA) [1] and multidimensional gas chromatography (MGC) [2] in the gasoline of stipulating in the at present domestic and international standard.Fluorescent indicator adsorption method effort again consuming time, the analysis cost height needs to use expensive import silica gel, and it is bigger that measurement result is influenced by human factor, the method repeatability is relatively poor, and detecting single sample needs 1.5h at least, is difficult to satisfy the quantitative test [3] for batch samples.Multidimensional gas chromatography, n-alkane in the gasoline, isoparaffin, naphthenic hydrocarbon, alkene, aromatic hydrocarbons and oxygenatedchemicals can be separated one by one according to carbon number, accuracy is higher, but this instrument is expensive, maintenance cost is high, and detects single sample for up to 75min.Advantages such as the high precision of Fourier transform infrared spectrometer, multiband, non-destruction sample make its application aspect the gasoline monitoring increasingly extensive.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of system of a kind of quick MEASUREMENT OF STEAM oil component based on bleeder Fourier transform infrared spectrometer design is provided, this invention has realized non-destruction, the polycomponent of gasoline are measured simultaneously, requirement is few, weak point consuming time has improved the precision of measurement result and has measured efficient.
The present invention is achieved by the following technical solutions:
A kind of system of quick MEASUREMENT OF STEAM oil component, include syringe, sample cell, Fourier transform infrared spectrometer, computing machine, the liquid inlet and outlet of described sample cell is connected with the liquid inlet and outlet pipe respectively, a T-valve is installed on the described feed tube, and described drain pipe is equipped with a retaining valve along the fluid direction; Fluid is extracted by syringe and injects feed tube, be installed with a filter membrane on the pipeline cross section between described syringe and the T-valve, the drain pipe end is connected with a waste liquid barrel, utilize spectrometer that oil phase in the sample cell is detected, Fourier transform infrared spectrometer is connected with computing machine by netting twine;
The concrete implementation step of MEASUREMENT OF STEAM oil component is as follows fast:
(1) sample cell is placed Fourier transform infrared spectrometer, open T-valve, wherein T-valve side valve door is closed temporarily;
(2) syringe extracts fluid, is injected into feed tube, and fluid flows into sample cell to being full of through membrane filtration, and unnecessary fluid is flowed out by drain pipe and leaks to waste liquid barrel through retaining valve, closes T-valve after injection finishes;
(3) open Fourier transform infrared spectrometer, the infrared light supply of Fourier transform infrared spectrometer sends light beam, enter the built-in detector of Fourier transform infrared spectrometer through the fluid sample pond, record the infrared absorption spectrum of gasoline solution by detector, data sync is conveyed into computing machine, computing machine carries out Treatment Analysis to accepting data, draws various chemical constitution concentration in the gasoline at last.
Described fluid sample pond light path is 0.02 millimeter, if light path is oversize, the solution absorption spectrum is saturated, if too short solution absorption spectrum peak is too little, and the quantitative test out of true.
The measure spectrum time is 3 minutes, and measuring number of times is 16 times, after each measurement finishes, enters next circulation and measures.
Advantage of the present invention is:
1, utilize the directly quantitative and qualitative analysis to gasolene ingredient of optical means, measuring method is simple, weak point consuming time, and less than 5min, the sample size that needs is few, and sample is 7ml.
2, can detect polycomponent gasolene ingredients such as ethanol, MTBE, ether simultaneously.
3, measuring accuracy height, 16 meters light paths, to the alcohol measurement precision less than 1%.
Description of drawings
Fig. 1 is structure principle chart of the present invention.
Embodiment
As shown in Figure 1, a kind of system of quick MEASUREMENT OF STEAM oil component, include syringe 1, sample cell 5, Fourier transform infrared spectrometer 9, computing machine 10, the liquid inlet and outlet of described sample cell 5 is connected with liquid inlet and outlet pipe 2,7 respectively, a T-valve 4 is installed on the described feed tube 2, and described drain pipe 7 is equipped with a retaining valve 6 along the fluid direction; Fluid is extracted by syringe 1 and injects feed tube 2, is installed with a filter membrane 3 on the pipeline cross section between described syringe 1 and the T-valve 4, and drain pipe 7 ends are connected with a waste liquid barrel 8, and Fourier transform infrared spectrometer 9 is connected with computing machine 10 by netting twine;
Sample cell is placed Fourier transform infrared spectrometer 9, open T-valve 4, wherein T-valve side valve door is closed temporarily, syringe 1 extracts fluid, be injected into feed tube 2, fluid filters through filter membrane 3 and flows into sample cell 5 to being full of, unnecessary fluid is flowed out by drain pipe 7 and leaks to waste liquid barrel 8 through retaining valve 6, after finishing, injection closes T-valve 4, the infrared light supply of Fourier transform infrared spectrometer 9 sends light beam, enter the built-in detector of Fourier transform infrared spectrometer 9 through fluid sample pond 5, record the infrared absorption spectrum of gasoline solution by detector, data transmission is gone into computing machine 10, and infrared absorption spectrum is carried out quantitatively and qualitative analysis, draws various chemical constitution concentration in the gasoline.
Described fluid sample pond 5 light paths are 0.02 millimeter, and the measure spectrum time is 3 minutes, and measuring number of times is 16 times, after each measurement finishes, enter next circulation and measure.
Claims (3)
1. the system of a quick MEASUREMENT OF STEAM oil component, it is characterized in that: include syringe, sample cell, Fourier transform infrared spectrometer, computing machine, the liquid inlet and outlet of described sample cell is connected with the liquid inlet and outlet pipe respectively, a T-valve is installed on the described feed tube, and described drain pipe is equipped with a retaining valve along the fluid direction; Fluid is extracted by syringe and injects feed tube, be installed with a filter membrane on the pipeline cross section between described syringe and the T-valve, the drain pipe end is connected with a waste liquid barrel, utilize spectrometer that oil phase in the sample cell is detected, Fourier transform infrared spectrometer is connected with computing machine by netting twine.
2. the system of a kind of quick MEASUREMENT OF STEAM oil component according to claim 1, the concrete implementation step of MEASUREMENT OF STEAM oil component is as follows fast:
(1) sample cell is placed Fourier transform infrared spectrometer, open T-valve, wherein T-valve side valve door is closed temporarily;
(2) syringe extracts fluid, is injected into feed tube, and fluid flows into sample cell to being full of through membrane filtration, and unnecessary fluid is flowed out by drain pipe and leaks to waste liquid barrel through retaining valve, closes T-valve after injection finishes;
(3) open Fourier transform infrared spectrometer, the infrared light supply of Fourier transform infrared spectrometer sends light beam, enter the built-in detector of Fourier transform infrared spectrometer through the fluid sample pond, record the infrared absorption spectrum of gasoline solution by detector, data sync is conveyed into computing machine, computing machine carries out Treatment Analysis to accepting data, draws various chemical constitution concentration in the gasoline at last.
3. the system of a kind of quick MEASUREMENT OF STEAM oil component according to claim 1, it is characterized in that: described fluid sample pond light path is 0.02 millimeter, and the measure spectrum time is 3 minutes, and measuring number of times is 16 times, after each measurement finishes, enter next circulation and measure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100578498A CN103257117A (en) | 2013-02-25 | 2013-02-25 | Rapid gasoline component measurement system |
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| CN2013100578498A CN103257117A (en) | 2013-02-25 | 2013-02-25 | Rapid gasoline component measurement system |
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| CN103257117A true CN103257117A (en) | 2013-08-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374566A (en) * | 2018-12-17 | 2019-02-22 | 湖北航天化学技术研究所 | A kind of measuring method and measurement system of mixed alcohol content |
| CN111007012A (en) * | 2019-12-20 | 2020-04-14 | 北京航天益来电子科技有限公司 | High-temperature multi-reflection sample cell air inlet device |
| CN111650324A (en) * | 2019-03-04 | 2020-09-11 | 内蒙古伊泰煤基新材料研究院有限公司 | Online detection method for hydrocarbon content |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374566A (en) * | 2018-12-17 | 2019-02-22 | 湖北航天化学技术研究所 | A kind of measuring method and measurement system of mixed alcohol content |
| CN111650324A (en) * | 2019-03-04 | 2020-09-11 | 内蒙古伊泰煤基新材料研究院有限公司 | Online detection method for hydrocarbon content |
| CN111007012A (en) * | 2019-12-20 | 2020-04-14 | 北京航天益来电子科技有限公司 | High-temperature multi-reflection sample cell air inlet device |
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Application publication date: 20130821 |