CN105300765A - Atmospheric aerosol organic carbon (OC)/element carbon (EC) visualized separation and preparation device - Google Patents
Atmospheric aerosol organic carbon (OC)/element carbon (EC) visualized separation and preparation device Download PDFInfo
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Abstract
The invention discloses an atmospheric aerosol organic carbon (OC)/element carbon (EC) visualized separation and preparation device. One port of a four-way valve, a first cold trap, a valve A1, a second cold trap, a valve A2, a first collecting pipe, a valve A3 and a vacuum pump are sequentially connected through pipelines. Another port of the four-way valve, a third cold trap, a valve B1, a fourth cold trap, a valve B2, a second collecting pipe, a valve B3 and a vacuum pump are sequentially connected through pipelines. Anther port of the four-way valve is connected with the tail end of an analysis pipe of a gas path system through a main vacuum pipeline, an intake pipe is further connected to the main vacuum pipeline, a valve C is arranged on the intake pipe, and pressure meters are arranged on the first collecting pipe and the second collecting pipe. By means of the device, organic carbon (OC)/element carbon (EC) can be completely collected, the collecting situation can be known through the pressure meters on the collecting pipes, and visualized separation and preparation of the organic carbon (OC)/element carbon (EC) are achieved.
Description
Technical field:
The invention belongs to field of environment engineering technology, be specifically related to a kind of atmospheric aerosol organic carbon (OC)/visual separation preparation facilities of elemental carbon (EC).
Background technology:
Atmospheric aerosol refers to suspension liquid state in an atmosphere or solid particles, mainly comprises six large class particulates: Sand Dust Aerosol, carbon aerosol, sulfate aerosol, nitrate gasoloid, ammonium salt gasoloid and marine aerosol.It is the maximum a kind of pollutant of enormous amount in urban atmosphere, complicated component, harm.TSP, PM10 and PM2.5 (referring to the particle of aerodynamic diameter≤100mm, 10mm and 2.5mm respectively) can be divided into according to aerodynamic diameter.Atmospheric particulates affect the energy exchange of Earth-atmospheric system by absorption and diffusesolarradiation, and then produce material impact to weather system, environment and human health.Current international whole world change and Atmospheric Chemistry research high order focusing atmospheric aerosol are to the Radiative Forcing effect of the disturbance of Earth climate system, particularly carbon aerosol.Carbon aerosol in air comprises organic carbon, elemental carbon.Wherein, elemental carbon has become in global atmosphere system and has been only second to CO
2heat component, elemental carbon is an important parameter in research global radiation balance, and in certain areas, the existence of elemental carbon can cause Aerosol radiation to force by the transformation of negative radiation effect to positive radiation effect, causes the warming effect that is clean.Since 1880,25% of global warning amplitude is attributable to elemental carbon.Therefore the discharge of constraint element carbon is one of effective way of warming of current mitigation of global climate.And the existence of organic carbon can cause Aerosol radiation to force by the transformation of negative radiation effect to positive radiation effect, cause the warming effect that clean.
In order to better study and control the impact of carbonaceous aerosol on Global climate change, therefore need to carry out Separation Research to each component in the carbonaceous of atmospheric aerosol, particularly by isolating its organic carbon (OC)/elemental carbon (EC), adopt carbon 14 isotope technology to determine the amount ratio of fossil-fueled and biomass combustion, carry out research of tracing to the source.
A kind of atmospheric aerosol organic carbon (OC)/elemental carbon (EC) in-line analyzer has been disclosed in prior art, it comprises: analytical furnace system, air-channel system, laser detection system, control system, detecting device, collects preparation system and host computer composition.Under the effect of control system, collection and the analysis of sample is there is in interior stove (comprising sample heater and oxidation furnace), air-channel system injects carrier gas and automatic quantitative sample internal standard compound with regime flow to sample heater, the effusion process of OC and EC on laser detection system monitoring filter membrane, OC and EC is accurately split, the CO that detecting device generates through chemical reaction tested component
2quantitative measurment, upper computer software real-time rendering spectrogram, and sample peak shape is identified automatically and resolves, (fourth is fine finally to calculate the mass concentration of various carbon component, Liu Jianguo, Lu Yihuai, Wang Yaping, Lu Fan, stone is founded the state. the development of air organic carbon/elemental carbon in-line analyzer, Chinese journal of scientific instrument, 35 (6), in June, 2014, p1246-1253).
Widely use the method CTO-375 method measuring carbonaceous aerosol at present, Walkey-Black method, thermochemical reduction method, thermophotometry etc., also do not have one can realize atmospheric aerosol organic carbon (OC)/elemental carbon (EC) visually and are separated and the device prepared.
Summary of the invention:
The object of this invention is to provide one and can realize atmospheric aerosol organic carbon (OC)/visual separation preparation facilities of elemental carbon (EC).
Atmospheric aerosol organic carbon (OC) of the present invention/visual separation preparation facilities of elemental carbon (EC), comprises analytical furnace system, air-channel system, laser detection system, control system, detecting device, collect preparation system and host computer, described collection preparation system is connected with the analyzer tube end of air-channel system, it is characterized in that, described collection preparation system comprises four-way valve, first cold-trap, valve A1, second cold-trap, valve A2, first collection tube, valve A3, 3rd cold-trap, valve B1, 4th cold-trap, valve B2, second collection tube, valve B3, vacuum pump and valve C, a port of described four-way valve, first cold-trap, valve A1, second cold-trap, valve A2, first collection tube, valve A3, vacuum pump is connected by pipeline order, the another one port of described four-way valve, 3rd cold-trap, valve B1, 4th cold-trap, valve B2, second collection tube, valve B3, vacuum pump is connected by pipeline order, the another one port of described four-way valve is connected with the analyzer tube end of air-channel system through vacuum main road, vacuum main road is also connected with draft tube, and draft tube is provided with valve C, and the first described collection tube and the second collection tube are all provided with tensimeter.
Described pipeline and vacuum main road are all preferably stainless steel pipes.
Preferably, vacuum main road is connected with polyfluortetraethylene pipe with the analyzer tube end vacuum adapter of air-channel system.
Preferably, the first described collection tube is identical with the structure of the second collection tube, it becomes three forked, comprise one end to close, the collection tube of other end opening, the sample feeding pipe be communicated with collection tube is provided with on the top of collection tube, the other end of sample feeding pipe is by sealing nut and the pipeline between valve A2 and valve A3 (being suitable for the first collection tube), or the pipeline (being suitable for the second collection tube) between valve B2 and valve B3 is connected, the openend of described collection tube is provided with the knob of this openend of sealing, taper Teflon stopper is connected with by stationary links in knob, taper Teflon stopper is provided with two O RunddichtringO, this taper Teflon stopper can extend in the collection tube of sample feeding pipe bottom, and adapt with the size of the collection tube at this place, thus this place's collection tube can be sealed.When sample introduction, knob is toward outward turning, drive taper Teflon stopper toward going out, thus the collection tube opened herein, sample enters collection tube bottom, after sample introduction completes, screw knob, taper Teflon stopper is walked toward collection tube bottom direction, and during to the collection tube place of sample feeding pipe bottom, taper Teflon stopper and this collection tube inside, place adapt, thus seal this place's collection tube, the sealing achieving sample is collected, and then can take off this first collection tube or the second collection tube from system, thus sample can be shifted.Described collection tube and sample feeding pipe are all quartz ampoule or glass tube.
Atmospheric aerosol organic carbon (OC) of the present invention/visual separation preparation facilities of elemental carbon (EC) runs like this:
Four-way valve can be beaten to A collection system (the first cold-trap, valve A1, the second cold-trap, valve A2, the first collection tube, valve A3) and B collection system (the 3rd cold-trap, valve B1, the 4th cold-trap, valve B2, the second collection tube, valve B3) respectively;
Collection process: before the visual separation preparation facilities of atmospheric aerosol organic carbon (OC)/elemental carbon (EC) analyzes sample introduction, open valve C, four-way valve is beaten to A collection system, open valve A1, valve A2 and valve A3, emptying by air in A collection system by vacuum pump, fill helium with.Then shutoff valve A1, valve A2 and valve A3.Four-way valve is beaten to B collection system, opens valve B1, valve B2, valve B3 equally, emptying by air in B collection system by vacuum pump, fills helium with.Last valve-off C, four-way valve is beaten to vacuum main road;
After atmospheric aerosol organic carbon (OC)/elemental carbon (EC) visual separation preparation facilities analysis sample introduction starts, can see that OC/EC is separated at software terminal and carry out situation, when see need collect OC peak time, four-way valve is beaten to A collection system, now valve A1, valve A2, valve A3 closes, liquid coolant (impurity such as chilled water) is done at the first cold-trap place dry ice and liquid nitrogen mixed liquor, liquid coolant is made at the second cold-trap place liquid nitrogen, open valve A1, now CO2 is in the second cold-trap enrichment.Make liquid coolant at the first collection tube place liquid nitrogen, open valve A3 and remove liquid nitrogen at the second cold-trap place, now CO2 is from the second cold-trap to the first collection tube enrichment, and the pressure gauge reading observed on the first collection tube can know collection situation.Collect the complete knob tightening the first collection tube and namely complete collection work.
Equally, when collecting EC peak, four-way valve is beaten to B collection system respectively, now valve B1, valve B2, valve B3 close, liquid coolant (impurity such as chilled water) is done at the 3rd cold-trap place dry ice and liquid nitrogen mixed liquor, make liquid coolant at the 4th cold-trap place liquid nitrogen, open valve B1, now CO2 is in the 4th cold-trap enrichment.Make liquid coolant at the second collection tube place liquid nitrogen, open valve B3 and remove liquid nitrogen at the 4th cold-trap place, now CO2 is from the 4th cold-trap to the second collection tube enrichment, and the pressure gauge reading observed on the second collection tube can know collection situation.Collect complete knob of tightening and namely complete collection work.
Vacuum pump is always in running order, ensure there is no Carbon Dioxide in Air in system before collected specimens, in collection process, the valve (valve A3 and valve B3) be connected with vacuum pump is not opened, so sample can not be taken away, because adopt be minipump and system pipeline wall is thicker, system can not be caused to damage by pressure.
As can be seen here, utilize the present invention can realize the collection of organic carbon (OC)/elemental carbon (EC) completely, and collection situation can be known by the tensimeter on collection tube, realize the separation preparation of organic carbon (the OC)/elemental carbon (EC) of visual (visual mainly by oc/ec analytical instrument workstation goes out cutting edge of a knife or a sword situation, in good time to collect).
Accompanying drawing illustrates:
Fig. 1 is the structural representation of the collection preparation system of atmospheric aerosol organic carbon (OC) of the present invention/visual separation preparation facilities of elemental carbon (EC);
Fig. 2 is the structural representation of the first collection tube and the second collection tube;
Wherein 1, four-way valve; 2, the first cold-trap; 3, valve A1; 4, the second cold-trap; 5, valve A2; 6, the first collection tube; 7, valve A3; 8, vacuum pump; 9, the 3rd cold-trap; 10, valve B1; 11, the 4th cold-trap; 12, valve B2; 13, the second collection tube; 14, valve B3; 15, valve C; 16, draft tube; 17, vacuum main road; 18,24, tensimeter; 19, collection tube; 20, sample feeding pipe; 21, knob; 22, stationary links; 23, taper Teflon stopper.
Embodiment:
Following examples further illustrate of the present invention, instead of limitation of the present invention.
Embodiment 1:
As depicted in figs. 1 and 2, atmospheric aerosol organic carbon (the OC)/visual separation preparation facilities of elemental carbon (EC) of the present embodiment, comprises analytical furnace system, air-channel system, laser detection system, control system, detecting device, collect preparation system and host computer, described collection preparation system is connected with the analyzer tube end of air-channel system, and described collection preparation system comprises four-way valve 1, first cold-trap 2, valve A13, second cold-trap 4, valve A25, first collection tube 6, valve A37, 3rd cold-trap 9, valve B110, 4th cold-trap 11, valve B212, second collection tube 13, valve B314, vacuum pump 8 and valve C15, a port of described four-way valve 1, first cold-trap 2, valve A13, second cold-trap 4, valve A25, first collection tube 6, valve A37, vacuum pump 8 is connected by pipeline order, the another one port of described four-way valve, 3rd cold-trap 9, valve B110, 4th cold-trap 11, valve B212, second collection tube 13, valve B314, vacuum pump 8 is connected by pipeline order, the another one port of described four-way valve is connected with the analyzer tube end of air-channel system through vacuum main road 17, vacuum main road is also connected with draft tube 16, draft tube is provided with valve C15, and the first described collection tube and the second collection tube are respectively equipped with tensimeter 18, 24, by collect pressure change before and after sample can estimate collect sample number.
Described pipeline and vacuum main road are all the pipeline that stainless steel material is made.
Vacuum main road adopts vacuum adapter to be connected with polyfluortetraethylene pipe with the analyzer tube end of air-channel system.
The first described collection tube 6 is identical with the structure of the second collection tube 13, it becomes three forked, comprise one end to close, the collection tube 19 of other end opening, the sample feeding pipe 20 be communicated with collection tube is provided with on the top of collection tube, the other end of sample feeding pipe is by sealing nut and the pipeline between valve A25 and valve A37 (being suitable for the first collection tube 6), or the pipeline (being suitable for the second collection tube 13) between valve B212 and B314 is connected, the openend of described collection tube is provided with the politef knob 21 of this openend of sealing, taper Teflon stopper 23 is connected with by stationary links 22 in knob, taper Teflon stopper is provided with two O RunddichtringO, this taper Teflon stopper can extend in the collection tube 19 of sample feeding pipe 20 bottom, and adapt with the size of the collection tube at this place, thus this place's collection tube can be sealed.When sample introduction, knob 21 is toward outward turning, drive taper Teflon stopper 23 toward going out, with regard to and the collection tube opened herein, sample enters collection tube bottom, after sample introduction completes, screw knob 21, taper Teflon stopper 23 is walked toward collection tube 19 bottom direction, during to the collection tube place of sample feeding pipe bottom, taper Teflon stopper 23 and this collection tube inside, place adapt, thus seal this place's collection tube, the sealing achieving sample is collected, then this first collection tube 6 or second collection tube 13 can be taken off from system, thus sample can be shifted.Described collection tube and sample feeding pipe are all quartz ampoule or glass tube, are convenient to observe.
Claims (4)
1. atmospheric aerosol organic carbon (OC)/visual separation preparation facilities of elemental carbon (EC), comprises analytical furnace system, air-channel system, laser detection system, control system, detecting device, collect preparation system and host computer, described collection preparation system is connected with the analyzer tube end of air-channel system, it is characterized in that, described collection preparation system comprises four-way valve, first cold-trap, valve A1, second cold-trap, valve A2, first collection tube, valve A3, 3rd cold-trap, valve B1, 4th cold-trap, valve B2, second collection tube, valve B3, vacuum pump and valve C, a port of described four-way valve, first cold-trap, valve A1, second cold-trap, valve A2, first collection tube, valve A3, vacuum pump is connected by pipeline order, the another one port of described four-way valve, 3rd cold-trap, valve B1, 4th cold-trap, valve B2, second collection tube, valve B3, vacuum pump is connected by pipeline order, the another one port of described four-way valve is connected with the analyzer tube end of air-channel system through vacuum main road, vacuum main road is also connected with draft tube, and draft tube is provided with valve C, and the first described collection tube and the second collection tube are all provided with tensimeter.
2. atmospheric aerosol organic carbon (OC) according to claim 1/visual separation preparation facilities of elemental carbon (EC), is characterized in that, described pipeline and vacuum main road are all stainless steel pipes.
3. atmospheric aerosol organic carbon (OC) according to claim 1/visual separation preparation facilities of elemental carbon (EC), it is characterized in that, vacuum main road is connected with polyfluortetraethylene pipe with the analyzer tube end vacuum adapter of air-channel system.
4. atmospheric aerosol organic carbon (OC) according to claim 1/visual separation preparation facilities of elemental carbon (EC), it is characterized in that, the first described collection tube is identical with the structure of the second collection tube, it becomes three forked, comprise one end to close, the collection tube of other end opening, the sample feeding pipe be communicated with collection tube is provided with on the top of collection tube, the other end of sample feeding pipe is by sealing nut and the pipeline between valve A2 and valve A3, or the pipeline between valve B2 and valve B3 is connected, the openend of described collection tube is provided with the knob of this openend of sealing, taper Teflon stopper is connected with by stationary links in knob, taper Teflon stopper is provided with two O RunddichtringO, this taper Teflon stopper can extend in the collection tube of sample feeding pipe bottom, and adapt with the size of the collection tube at this place, thus this place's collection tube can be sealed.
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| CN108226274A (en) * | 2018-01-26 | 2018-06-29 | 中国科学院地球环境研究所 | 14C-AMS fast on-line analyzing instrument |
| CN109425648A (en) * | 2017-08-28 | 2019-03-05 | 瑞湾科技（珠海）有限公司 | A kind of sample analysis method and device of fast pyrogenation analysis sample introduction |
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