CN209296659U - A kind of analytical equipment for non-methane total hydrocarbons in VOC - Google Patents
A kind of analytical equipment for non-methane total hydrocarbons in VOC Download PDFInfo
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- CN209296659U CN209296659U CN201920048766.5U CN201920048766U CN209296659U CN 209296659 U CN209296659 U CN 209296659U CN 201920048766 U CN201920048766 U CN 201920048766U CN 209296659 U CN209296659 U CN 209296659U
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Abstract
The utility model discloses a kind of analytical equipments for non-methane total hydrocarbons in VOC, including determining volume probe tube, ten-way valve, carrier gas supervisor etc., No. 1 interface of ten-way valve connects sample inlet, No. 2 interfaces connect sample export, determine in the pipeline that volume probe tube is connected between No. 3 interfaces and No. 10 interfaces；No. 4 interfaces connect the second threeway, and the two or three reduction of fractions to a common denominator two-way is sequentially connected Propark Q chromatographic column, third threeway all the way, and another way is sequentially connected needle-valve, passivation total hydrocarbon void column, third threeway, and third threeway passes through anti-stall damping column again and connects No. 8 interfaces；Carrier gas supervisor is divided into two-way by the first threeway, is all the way the first carrier gas channel, and the first carrier gas channel connects No. 9 interfaces, and another way is the second carrier gas channel, and the second carrier gas channel connects No. 6 interfaces, and No. 7 interfaces connect hydrogen flame detector.The utility model detection sensitivity is high, and stability is good, and analytical cycle is short, and measurement accuracy is high, measurement while can meeting total hydrocarbon and methane in environmentally friendly VOC emission.
Description
Technical field
The utility model relates to gas analyzing apparatus and method more particularly to a kind of points for non-methane total hydrocarbons in VOC
Analysis apparatus.
Background technique
The analysis method of non-methane total hydrocarbons in current environment air and industrial waste gas mostly uses the double sample introduction processes of single ten-way valve
The content of total hydrocarbon and methane is measured respectively, and the difference of the two is non-methane total hydrocarbons.This method analytical cycle is long, non-target components
Annoyance level is big, and the inaccuracy of sample becomes larger, and causes analysis result poor repeatability.The above analysis method is also possible that methane
Peak area is greater than the case where total hydrocarbon peak area, so that non-methane total hydrocarbons data cannot get satisfactory result.As environmental protection puts more effort,
The raising of national discharge standard, design it is a kind of effectively improve analysis speed and processing accuracy analysis method it is extremely urgent.
Therefore, a kind of analytical equipment for non-methane total hydrocarbons in VOC is researched and developed, those skilled in the art's urgent problem to be solved is become.
Summary of the invention
The utility model is to provide a kind of analytical equipment for non-methane total hydrocarbons in VOC to solve above-mentioned deficiency.
The above-mentioned purpose of the utility model is realized by technical solution below: one kind is for non-methane total hydrocarbons in VOC
Analytical equipment, including determine volume probe tube, ten-way valve, carrier gas supervisor, needle-valve, passivation total hydrocarbon void column, Propark Q chromatography
Column, anti-stall damping column and hydrogen flame detector, the ten-way valve are equipped with 1-10 interface, wherein No. 1 interface connect sample into
Mouthful, No. 2 interfaces connect sample export, described to determine in the pipeline that volume probe tube is connected between No. 3 interfaces and No. 10 interfaces；4
Number interface connects the second threeway, and the two or three reduction of fractions to a common denominator two-way is sequentially connected Propark Q chromatographic column, third threeway, separately all the way
It is sequentially connected needle-valve, passivation total hydrocarbon void column, third threeway all the way, third threeway passes through anti-stall damping column again and connects No. 8 interfaces；
The carrier gas supervisor is divided into two-way by the first threeway, is all the way the first carrier gas channel, and the first carrier gas channel connects No. 9 interfaces,
Another way is the second carrier gas channel, and the second carrier gas channel connects No. 6 interfaces, and No. 7 interfaces connect hydrogen flame detector, No. 5 interfaces
Emptying.
Wherein, described to determine volume probe tube and ten-way valve composition sampling unit, when guaranteeing that sample enters separative unit switching
No air leaks and impact analysis system；
The Propark Q chromatographic column, passivation total hydrocarbon void column and needle-valve form separative unit, cut blowback by valve and complete
Component separation, wherein being passivated total hydrocarbon void column application resistance to 1/8 inch of * 40cm by metering pin valve to guarantee to determine volume probe tube
Sample with the sample size of 1:4 enter Propark Q column and passivation total hydrocarbon void column；
The pipeline that first carrier gas channel and the second carrier gas channel use passes through Passivation Treatment, prevents total hydrocarbon peak type from dragging
Tail or sample are adsorbed and influence measurement accuracy, wherein pipeline used in the second carrier gas channel is internal diameter 0.12mm long
The damping column of 20cm is spent, Vavle switching bring baseline wave is supplied and reduced to chromatographic column to guarantee that the first carrier gas channel can be stablized
Dynamic, pipeline specifications used in anti-stall damping column are internal diameter 0.12mm length 4cm, it is therefore an objective to prevent pressure oscillation after Vavle switching from causing
Detector it is flame-out.
The hydrogen flame detector constitutes detection unit.
It is total using non-methane in the analytical equipment analysis surrounding air and industrial waste gas for non-methane total hydrocarbons in VOC
The method of hydrocarbon are as follows: when ten-way valve is in reset state, after sample to be tested gas is by determining volume probe tube, switching ten-way valve enters
Sample introduction state determines the sample gas in volume probe tube and respectively enters Propark by the second threeway under the drive of the first carrier gas
Q chromatographic column and 1/8 inch of passivation total hydrocarbon void column, passivation total hydrocarbon void column does not have separating effect, so component total hydrocarbon is introduced into hydrogen
Flame detector, component oxygen and component methane are separated in Propark Q chromatographic column, and oxygen is with methane sequencing stream
Enter hydrogen flame detector, reset ten-way valve after methane flows out Propark Q chromatographic column and enter blowback process, the first carrier gas from
Propark Q chromatographic column rear end starts the quick blowback of unwanted component going out Propark Q chromatographic column to be exhausted by drain,
It prevents interfering component from entering hydrogen flame detector and generates error.
The utility model compared with prior art the advantages of be: this analytical equipment is in analytical cycle, data validity, chromatography
There is important breakthrough on instrument stability and production cost.
1, analytical cycle is shortened.Switching ten-way valve enters blowback mode after the outflow of target peak methane, can will be high boiling
Point organic matter blowback is fallen, and eliminates interference of the high boiling point organic compound to next cycle analysis, guarantees the stability of component retention time
With identification degree, while shortening and analytical cycle and extending the service life of chromatographic column.
2, analysis result is met the requirements.By increasing needle-valve in total hydrocarbon void column front end, adjusts sample and enter two root chromatogram columns
Amount, control the ratio of total hydrocarbon peak area and methane peak area, the amount response on the detector into two root chromatogram columns can be made
Ratio is optimum state, ensure that the validity of analysis data every time.
3, chromatograph stability is increased substantially.Carrier gas is set to enter hydrogen flame detection by damping column in valve reset state
The stability of flow of device, chromatographic column are constantly in purging state, and without in any sample carryover column, noise is small when sky walks baseline, and valve is cut
The baseline fluctuation generated after changing is small, and instrumental sensitivity improves, and detection limit is lower.Hydrogen flame detector igniting quality is by carrier gas and combustion
The air-flow for burning gas is very bigger than influencing, and between the detector front end of chromatographic column rear end plus segment damping column can stablize passivation total hydrocarbon sky
Column bring pressure oscillation after Vavle switching is not in flame-out exception, can ensure that chromatograph operates normally for a long time, meet
The unattended requirement of VOC on-line monitoring system.
4, production cost is reduced.The process of this analysis method double sample introductions logical compared to tradition ten, eliminates interfering component, shortens
Analysis time.The process that total hydrocarbon adds six-way valve to survey methane is surveyed than ten-way valve blowback, saves a six-way valve, air circuit connection letter
Single, material when reducing assembling and setting is lost with artificial, reduces production cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
As shown in Figure 1, a kind of analytical equipment for non-methane total hydrocarbons in VOC, including determine volume probe tube 101, ten and lead to
Valve 102, carrier gas supervisor 113, needle-valve 110, passivation total hydrocarbon void column 106, Propark Q chromatographic column 105, anti-stall damping column 111
With hydrogen flame detector 112, the ten-way valve 102 is equipped with 1-10 interface, wherein No. 1 interface connects sample inlet, and No. 2 connect
Mouth connection sample export, it is described to determine in the pipeline that volume probe tube 101 is connected between No. 3 interfaces and No. 10 interfaces；No. 4 interfaces
The second threeway 108 is connected, second threeway 108 divides two-way, is sequentially connected Propark Q chromatographic column 105, third threeway all the way
109, another way is sequentially connected needle-valve 110, passivation total hydrocarbon void column 106, third threeway 109, and third threeway 109 is again by anti-stall
Damping column 111 connects No. 8 interfaces；Carrier gas supervisor 113 is divided by the first threeway 107 for two-way, is all the way the first carrier gas pipe
Road 103, the first carrier gas channel 103 connect No. 9 interfaces, and another way is the second carrier gas channel 104, the second carrier gas channel 104 connection 6
Number interface, 112, No. 5 interfaces emptying of No. 7 interfaces connection hydrogen flame detectors.
Wherein, described to determine volume probe tube 101 and the composition sampling unit of ten-way valve 102, guarantee that sample enters separative unit
It is leaked and impact analysis system when switching without air；
The Propark Q chromatographic column 105, passivation total hydrocarbon void column 106 and needle-valve 110 form separative unit, are cut by valve
It cuts blowback and completes component separation, wherein fixed to guarantee to 1/8 inch of * 40cm passivation total hydrocarbon void column application resistance by metering pin valve
The sample of volume probe tube enters Propark Q column and passivation total hydrocarbon void column with the sample size of 1:4；
The pipeline that first carrier gas channel 103 and the second carrier gas channel 104 use passes through Passivation Treatment, prevents total hydrocarbon peak
Type hangover or sample are adsorbed and influence measurement accuracy, wherein pipeline used in the second carrier gas pipe 104 is internal diameter
The damping column of 0.12mm length 20cm can be stablized with the first carrier gas channel 103 of guarantee and supply to chromatographic column and reduce Vavle switching
Bring baseline fluctuation, pipeline specifications used in anti-stall damping column are internal diameter 0.12mm length 4cm, it is therefore an objective to after preventing Vavle switching
Detector caused by pressure oscillation is flame-out.
The hydrogen flame detector 112 constitutes detection unit.
It is total using non-methane in the analytical equipment analysis surrounding air and industrial waste gas for non-methane total hydrocarbons in VOC
The method of hydrocarbon are as follows: when ten-way valve 102 is in reset state, after sample to be tested gas is by determining volume probe tube 101, switching ten is logical
Valve 102 enters sample introduction state, determines the sample gas in volume probe tube 101 under the drive of the first carrier gas by the second threeway 108
Propark Q chromatographic column 105 and 1/8 inch of passivation total hydrocarbon void column 106 are respectively enterd, passivation total hydrocarbon void column 106 does not have separation
Effect, so component total hydrocarbon is introduced into hydrogen flame detector 112, component oxygen and component methane in Propark Q chromatographic column 105
In separated, oxygen with methane sequencing flow into hydrogen flame detector 112, when methane flow out Propark Q chromatographic column 105
Ten-way valve 102 is resetted afterwards and enters blowback process, and the first carrier gas is since 105 rear end of Propark Q chromatographic column by unwanted group
Divide quick blowback to go out Propark Q chromatographic column 105 to exhaust by drain, prevents interfering component from entering hydrogen flame detector 112
Generate error.
The above description is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all
Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is applied directly or indirectly in
Other related technical areas are also included in the patent protection scope of the utility model.
Claims (1)
1. a kind of analytical equipment for non-methane total hydrocarbons in VOC, it is characterised in that: including determining volume probe tube, ten-way valve, load
Gas supervisor, needle-valve, passivation total hydrocarbon void column, Propark Q chromatographic column, anti-stall damping column and hydrogen flame detector, described ten is logical
Valve is equipped with 1-10 interface, wherein No. 1 interface connects sample inlet, and No. 2 interfaces connect sample export, described to determine volume sampling
Pipe is connected in the pipeline between No. 3 interfaces and No. 10 interfaces；No. 4 interfaces the second threeways of connection, the two or three reduction of fractions to a common denominator two-way,
It is sequentially connected Propark Q chromatographic column, third threeway all the way, another way is sequentially connected needle-valve, passivation total hydrocarbon void column, the three or three
Logical, third threeway passes through anti-stall damping column again and connects No. 8 interfaces；Carrier gas supervisor is divided into two-way by the first threeway, and one
Road is the first carrier gas channel, and the first carrier gas channel connects No. 9 interfaces, and another way is the second carrier gas channel, and the second carrier gas channel connects
No. 6 interfaces are connect, No. 7 interfaces connect hydrogen flame detector, No. 5 interface emptying.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920048766.5U CN209296659U (en) | 2019-01-12 | 2019-01-12 | A kind of analytical equipment for non-methane total hydrocarbons in VOC |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920048766.5U CN209296659U (en) | 2019-01-12 | 2019-01-12 | A kind of analytical equipment for non-methane total hydrocarbons in VOC |
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| CN209296659U true CN209296659U (en) | 2019-08-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580839A (en) * | 2019-01-12 | 2019-04-05 | 上海凡伟仪器设备有限公司 | A kind of analytical equipment and analysis method for non-methane total hydrocarbons in VOC |
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- 2019-01-12 CN CN201920048766.5U patent/CN209296659U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580839A (en) * | 2019-01-12 | 2019-04-05 | 上海凡伟仪器设备有限公司 | A kind of analytical equipment and analysis method for non-methane total hydrocarbons in VOC |
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