CN101308088B - System and method for measuring chemical fertilizer volatile gas - Google Patents

System and method for measuring chemical fertilizer volatile gas Download PDF

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Publication number
CN101308088B
CN101308088B CN 200810123022 CN200810123022A CN101308088B CN 101308088 B CN101308088 B CN 101308088B CN 200810123022 CN200810123022 CN 200810123022 CN 200810123022 A CN200810123022 A CN 200810123022A CN 101308088 B CN101308088 B CN 101308088B
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CN
China
Prior art keywords
repeatedly
gas
closed box
fourier transform
chemical fertilizer
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Expired - Fee Related
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CN 200810123022
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Chinese (zh)
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CN101308088A (en
Inventor
魏秀丽
高闽光
陆亦怀
童晶晶
徐亮
陈军
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Anhui Institute of Optics and Fine Mechanics of CAS
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Anhui Institute of Optics and Fine Mechanics of CAS
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Priority to CN 200810123022 priority Critical patent/CN101308088B/en
Publication of CN101308088A publication Critical patent/CN101308088A/en
Application granted granted Critical
Publication of CN101308088B publication Critical patent/CN101308088B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The invention discloses a system for measuring fertilizer volatile gases and a method thereof. A fertilizer is positioned in a closed box which is connected with a vacuum pump through an air tube, and the other end of the vacuum pump is connected with a multiple-reflection cell of a Fourier transform infrared spectrometer through the air tube. A computer controls the vacuum pump to draw fertilizer volatile gases in the closed box into the multiple-reflection cell, the Fourier transform infrared spectrometer measures infrared spectra of various gases, and the computer implements the quantitative and qualitative analysis to the measured gases. The occurrence of the Fourier transform infrared spectrometer improves the precision of gas quantitative and qualitative measurement, thereby realizing the non-destructive and multi-component measurement to volatile gases and providing a measuring means for volatile gases of fertilizer. The system has advantages of simple structure and convenience, and realizes the real-time and multi-component measurement to volatile gases of fertilizer, meanwhile promoting the rapid development of the Fourier transform infrared spectrometer in the aspect of air environment detection.

Description

A kind of system and method for measuring chemical fertilizer volatile gas
Technical field
The present invention relates to environment measuring technology and analysis and optical technical field, a kind of specifically system of measuring chemical fertilizer volatile gas.
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 the qualitative, quantitative monitoring of atmospheric pollution.
China has become maximum in the world chemical fertilizer production state and country of consumption at present.What can not be ignored is, China's utilization rate of fertilizer is very low, and the fertilizer efficiency of the common fertilizer of use has only about 30%, and energy dissipation that causes and problem of environmental pollution have caused global concern.The utilization factor and the ammonia volatilization of chemical fertilizer have direct relation, and it is high more to volatilize, and utilization factor is low more.Domestic ammonia volatilization research is main uses static closed circuit case method, semi-open method, intermittently venting method and mass balance method, and their shortcoming is directly to measure [1,2] to gas.Advantages such as the high precision of Fourier transform infrared spectrometer, multiband, non-destruction sample make its application aspect environment increasingly extensive.The present invention utilizes the bleeder Fourier transform infrared spectrometer to design a kind of system of measuring chemical fertilizer volatile gas.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of system and method for measuring chemical fertilizer volatile gas is provided, this invention has realized non-destruction, the polycomponent measurement to volatilization gas, has improved the precision and the efficient of measurement result.
Technical scheme of the present invention:
A kind of system of measuring chemical fertilizer volatile gas, comprise closed box, vacuum pump, repeatedly reflection tank, tracheae, Fourier transform infrared spectrometer, computing machine, it is characterized in that: be used to place chemical fertilizer in the closed box, the vacuum pump inlet end links to each other with closed box by tracheae, the outlet side links to each other with reflection tank air intake opening repeatedly, repeatedly the reflection tank gas outlet links to each other by tracheae with closed box, forms a gas circulation pipeline; Repeatedly the light inlet place of reflection tank is equipped with the infrared light supply of Fourier transform infrared spectrometer, and repeatedly the light-emitting window place of reflection tank is equipped with the detector of Fourier transform infrared spectrometer, computer control vacuum pump and Fourier transform infrared spectrometer.
Described a kind of system of measuring chemical fertilizer volatile gas, it is characterized in that the inlet end that tracheae that described vacuum pump inlet end connects is positioned at closed box is equipped with filter funnel, the outlet side of vacuum pump and repeatedly be provided with filter membrane in the tracheae between the reflection tank air intake opening.
A kind of method of measuring chemical fertilizer volatile gas, it is characterized in that: chemical fertilizer is positioned in the closed box, closed box and repeatedly set up the gas circulation pipeline between the reflection tank, squeeze into repeatedly reflection tank by the gas of air pump after with chemical fertilizer volatilization in the closed box, the gas that comes out from reflection tank repeatedly returns in the closed box, the light beam that the infrared light supply of Fourier transform infrared spectrometer sends enters repeatedly reflection tank from the light inlet of reflection tank repeatedly, after repeatedly reflecting, go out to inject the detector of Fourier transform infrared spectrometer from the light-emitting window of reflection tank repeatedly, measure the infrared absorption spectrum that repeatedly reflects pool gas by Fourier transform infrared spectrometer, infrared absorption spectrum is carried out quantitatively and qualitative analysis by computing machine.
The method of described measurement chemical fertilizer volatile gas is characterized in that: squeeze into repeatedly reflection tank again behind the gas process filter funnel in the air pump suction closed box after the chemical fertilizer volatilization, the membrane filtration.
The method of described measurement chemical fertilizer volatile gas is characterized in that: in the Fourier transform infrared spectrometer measuring process, it is stable to keep repeatedly reflecting pool gas.
The present invention's advantage compared with prior art is as follows:
1, utilize optical means directly to measure the gas that chemical fertilizer volatilizes, measuring method is simple.
2, can detect multicomponent gases such as NO2, NH3, N2O simultaneously.
3, measuring accuracy height, 16 meters light paths, to the NO2 measuring error at 88ppb, to the NH3 measuring error at 80ppb
Description of drawings
Fig. 1 is a schematic diagram of the present invention.
Embodiment
As shown in Figure 1, be placed with sealing of chemical fertilizer, guarantee that the gas of volatilization does not leak with closed box (1).Vacuum pump (3) one ends link to each other with the interior escape pipe of closed box, the pipeline section of giving vent to anger is connected with funnel, for the contact of large tracts of land more gas, the other end of vacuum pump (3) links to each other with the air intake opening of reflection tank (4) repeatedly by filter membrane, filter membrane filters out the compositions such as dust in the gas, with the catoptron in the anti-pollution repeatedly reflection tank.The gas that comes out in the reflection tank (4) repeatedly enters again in the closed box (1).All adopt sealing system in the whole process, so just can not influence the concentration of measuring the chemical fertilizer volatilization gas.Computing machine (8) is controlled vacuum pump (3) by control line (6), comes timing extraction gas.Repeatedly the light inlet place of reflection tank is equipped with the infrared light supply of Fourier transform infrared spectrometer, repeatedly the light-emitting window place of reflection tank is equipped with the detector of Fourier transform infrared spectrometer, the light that infrared light supply sends shines detector after repeatedly reflecting in being full of the repeatedly reflection tank of gas to be measured.Computing machine (8) links to each other by netting twine (7) with Fourier transform infrared spectrometer (5).Measure the absorption spectrum that repeatedly reflects pool gas, measurement gas is carried out quantitatively and qualitative analysis.The sample cell volume is 8L, and therefore choosing the vacuum pump extracting gases time is 2 minutes, and flow velocity is 32L/min, balance 1 minute, and it is stable to guarantee repeatedly to reflect pool gas.Measuring number of times is 16 times, and the measure spectrum time is 3 minutes.

Claims (4)

1. system of measuring chemical fertilizer volatile gas, comprise closed box, vacuum pump, repeatedly reflection tank, tracheae, Fourier transform infrared spectrometer, computing machine, it is characterized in that: be used to place chemical fertilizer in the closed box, the vacuum pump inlet end links to each other with closed box by tracheae, the outlet side links to each other with reflection tank air intake opening repeatedly, repeatedly the reflection tank gas outlet links to each other by tracheae with closed box, forms a gas circulation pipeline; Repeatedly the light inlet place of reflection tank is equipped with the infrared light supply of Fourier transform infrared spectrometer, and repeatedly the light-emitting window place of reflection tank is equipped with the detector of Fourier transform infrared spectrometer, computer control vacuum pump and Fourier transform infrared spectrometer.
2. a kind of system of measuring chemical fertilizer volatile gas according to claim 1, it is characterized in that the inlet end that tracheae that described vacuum pump inlet end connects is positioned at closed box is equipped with filter funnel, the outlet side of vacuum pump and repeatedly be provided with filter membrane in the tracheae between the reflection tank air intake opening.
3. method of measuring chemical fertilizer volatile gas, it is characterized in that: chemical fertilizer is positioned in the closed box, closed box and repeatedly set up the gas circulation pipeline between the reflection tank, squeeze into repeatedly reflection tank by the gas of air pump after with chemical fertilizer volatilization in the closed box, the gas that comes out from reflection tank repeatedly returns in the closed box, the light beam that the infrared light supply of Fourier transform infrared spectrometer sends enters repeatedly reflection tank from the light inlet of reflection tank repeatedly, after repeatedly reflecting, go out to inject the detector of Fourier transform infrared spectrometer from the light-emitting window of reflection tank repeatedly, measure the infrared absorption spectrum that repeatedly reflects pool gas by Fourier transform infrared spectrometer, infrared absorption spectrum is carried out quantitatively and qualitative analysis by computing machine.
4. the method for measurement chemical fertilizer volatile gas according to claim 3 is characterized in that: squeeze into repeatedly reflection tank again behind the gas process filter funnel in the air pump suction closed box after the chemical fertilizer volatilization, the membrane filtration.
CN 200810123022 2008-06-18 2008-06-18 System and method for measuring chemical fertilizer volatile gas Expired - Fee Related CN101308088B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200810123022 CN101308088B (en) 2008-06-18 2008-06-18 System and method for measuring chemical fertilizer volatile gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200810123022 CN101308088B (en) 2008-06-18 2008-06-18 System and method for measuring chemical fertilizer volatile gas

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CN101308088A CN101308088A (en) 2008-11-19
CN101308088B true CN101308088B (en) 2010-06-23

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102081038B (en) * 2011-01-24 2012-07-04 宁波市环境监测中心 Detection device for volatile substance in water and detection method thereof
CN102207454A (en) * 2011-04-01 2011-10-05 中国科学院南京土壤研究所 Device and method for field in-situ determination of farmland ammonia volatilization
CN102359948B (en) * 2011-06-29 2013-10-09 中国科学院安徽光学精密机械研究所 System and method for measuring greenhouse gas
CN103852437B (en) * 2014-03-22 2016-05-04 中国科学院合肥物质科学研究院 A kind of mid-infrared light spectral measurement system and method for greenhouse gas emission flux
CN106124710A (en) * 2016-08-12 2016-11-16 安徽中杰信息科技有限公司 Escaping gas concentration inspection method
CN109964613B (en) * 2019-04-01 2020-07-14 农业农村部南京农业机械化研究所 Biogas slurry spreading experiment bench

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