CN205449910U - Non -methane total hydrocarbon on -line measuring device - Google Patents
Non -methane total hydrocarbon on -line measuring device Download PDFInfo
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- CN205449910U CN205449910U CN201521134139.1U CN201521134139U CN205449910U CN 205449910 U CN205449910 U CN 205449910U CN 201521134139 U CN201521134139 U CN 201521134139U CN 205449910 U CN205449910 U CN 205449910U
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Abstract
The utility model relates to a non -methane total hydrocarbon on -line measuring device, include: sample gas passageway, two carrier gas passageways, two quantitative modules, first chromatographic column, second chromatographic column, its characterized in that: the on -line measuring device further includes: the admission valve, the switching of admission valve makes two quantitative modules selectively communicate the sample gas passageway or two carrier gas passageways, the detector, the detector intercommunication two carrier gas passageways, the blowback module, blowback module setting is in the gas circuit of one of them carrier gas passageway. The utility model has the advantages of simple structure, simple operation, the accuracy is good, efficiency of software testing is high.
Description
Technical field
This utility model relates to the content analysis of methane, NMHC, particularly to a kind of single injected sampling, the methane of single detector detection, NMHC on-line measuring device.
Background technology
Standard HJ/T38-1999 is pointed out, use double injection port, double chromatographic column, the method for dual detector that the NMHC in Concentration in Fixed Pollutants Source is detected, with a root chromatogram column and a detector detection total hydrocarbon content, methane and non-methane are separated by another root chromatogram column, being obtained methane content by the methane of chromatographic column by second detector detection, both differences are the content of NMHC.But there are the following problems in actual applications for the method:
1. device is complicated: using and be configured with two injection ports (or two valves), the device of two detectors or directly use two set chromatographs to be analyzed, apparatus structure is complicated；
2. complex operation: measure methane and total hydrocarbon needs twice sample introduction, relatively complicated in operation, waste time and energy；
3. accuracy is low: methane uses different detectors to detect with total hydrocarbon, and different detectors there may be difference in response, causes result to there may be difference, and accuracy reduces；
4. testing efficiency is low: if there is high boiling substance in sample gas, and methane there may be residual in analyzing the chromatographic column on stream, need to carry out chromatographic column high temperature ageing, just can carry out mensuration next time, and testing efficiency is relatively low；In the case of sample gas amount is relatively big, it is also possible to the test of the different sample room of interference, affect accuracy.
Utility model content
In order to solve the deficiency in above-mentioned prior art, this utility model provides a kind of simple in construction, simple operation, accuracy is good, testing efficiency is high NMHC on-line measuring device.
The purpose of this utility model is achieved through the following technical solutions:
A kind of NMHC on-line measuring device, including: sample gas passage, two carrier gas passage, two quantitative modules, the first chromatographic column, the second chromatographic columns, described on-line measuring device farther includes:
Injection valve, the switching of described injection valve makes described two quantitative modules selectively connect sample gas passage or described two carrier gas passage；
Detector, described detector connects described two carrier gas passage；
Blowback module, described blowback module is disposed therein in the gas circuit of a carrier gas passage, material in reverse blow the first chromatographic column or the second chromatographic column void column side by side.
According to above-mentioned NMHC on-line measuring device, it is preferable that described blowback module farther includes:
First electromagnetic valve, described first electromagnetic valve is used for coordinating injection valve, controls the carrier gas direction in the first chromatographic column or the second chromatographic column；
Second electromagnetic valve, described second electromagnetic valve, for coordinating the first electromagnetic valve, discharges material in the first chromatographic column or the second chromatographic column.
According to above-mentioned NMHC on-line measuring device, it is preferable that described injection valve is ten-way valve.
According to above-mentioned NMHC on-line measuring device, alternatively, described first electromagnetic valve is three-way valve.
According to above-mentioned NMHC on-line measuring device, alternatively, described second electromagnetic valve is two-port valve.
Compared with prior art, this utility model has the beneficial effect that
1, this utility model uses and coordinates flow path designs while switch sampling valve, uses one injection valve and detector to realize the detection of NMHC, and apparatus structure is simple, reliability is high, avoids the response difference problem that dual detector detection brings simultaneously.
2, by switching and two sample intake passages of injection valve, single injected sampling can analyze the content of methane and total hydrocarbon, simple and convenient.
3, this utility model uses blowback module, quickly discharges methane and analyzes the high boiling substance in the chromatographic column on stream, is effectively shortened the test period of NMHC, substantially increases accuracy and the analysis efficiency of detection.
Accompanying drawing explanation
Referring to the drawings, disclosure of the present utility model will be easier to understand.Skilled addressee readily understands that: these accompanying drawings are used only for illustrating the technical solution of the utility model, and are not intended to be construed as limiting protection domain of the present utility model.In figure:
Fig. 1 is the NMHC on-line measuring device view in the quantitative stage of this utility model embodiment 1；
Fig. 2 is the NMHC on-line measuring device view in the sample introduction stage of this utility model embodiment 1；
Fig. 3 is the NMHC on-line measuring device view in the blowback stage of this utility model embodiment 1.
Detailed description of the invention
Fig. 1-3 and following description describe how optional embodiment of the present utility model is implemented with teaching those skilled in the art and reproduce this utility model.In order to instruct technical solutions of the utility model, simplify or eliminated some conventional aspects.Those skilled in the art should understand that be derived from these embodiments modification or replace will be in the range of this utility model.Those skilled in the art should understand that following characteristics can combine to form multiple modification of the present utility model in every way.Thus, this utility model is not limited to following embodiment, and is only limited by claim and their equivalent.
Embodiment 1
Fig. 1 schematically illustrates the structural representation of the NMHC on-line measuring device of the present embodiment, as shown in Figure 1, described NMHC on-line measuring device includes: sample gas passage, the first carrier gas passage, the second carrier gas passage, first quantitative module 11, second quantitative module the 12, first chromatographic column the 31, second chromatographic column 32, and described on-line measuring device farther includes:
Injection valve 2, the switching of described injection valve (such as ten-way valve) makes the first quantitative module connect sample gas passage simultaneously with the second quantitative module or be respectively communicated with the first carrier gas passage, the second carrier gas passage；
Detector 4, described detector connects the first carrier gas passage and the second carrier gas passage；
Blowback module, described blowback module is arranged in the gas circuit of the second carrier gas passage, for reverse blow the second chromatographic column material in discharging post.
For simplifying apparatus structure, reduce operation easier, therefore, further, described blowback module includes:
First electromagnetic valve 51, described first electromagnetic valve (such as three-way valve) is used for coordinating injection valve, controls the carrier gas direction in the second chromatographic column；
Second electromagnetic valve 52, described second electromagnetic valve (such as two-port valve) be used for coordinating as described in the first electromagnetic valve, discharge material in the second chromatographic column.
The present embodiment additionally provides the detection method of above-mentioned NMHC on-line measuring device, including with the next stage:
(A1) the quantitative stage, Fig. 1 schematically illustrates the NMHC on-line measuring device view in the quantitative stage, as shown in Figure 1, switching by injection valve (such as ten-way valve) so that sample gas enters the first quantitative module via sample gas passage, injection valve and the second quantitative module is quantitative；
(A2) the sample introduction stage, Fig. 2 schematically illustrates the NMHC on-line measuring device view in the sample introduction stage, described injection valve is switched to connection status as shown in Figure 2, described first quantitative module connects the first carrier gas passage, carrier gas is by described injection valve, the first quantitative module, carry away the sample gas in the described first quantitative module, enter detector analysis through the first chromatographic column；By blowback module regulation to state as shown in Figure 2, i.e. blowback module controls carrier gas forward in the second carrier gas passage and purges the second chromatographic column；Described second quantitative module connects the second carrier gas passage, and carrier gas, by described injection valve, the second quantitative module, carries away the sample gas in the described second quantitative module, and the methane after the second chromatographic column separates enters detector analysis；
(A3) the blowback stage, Fig. 3 schematically illustrates the NMHC on-line measuring device view in the blowback stage, blowback module is regulated to state as shown in Figure 3, i.e. blowback module controls carrier gas reverse blow second chromatographic column in the second carrier gas passage, discharges post and includes the NMHC of high boiling substance.
Further, step (A2) also includes:
(B1) regulation carrier gas flux, enters detector analysis from the first chromatographic column, the second chromatographic column sample gas out in different time sections.
This utility model embodiment 1 has an advantage that: by injection valve and corresponding flow path designs, uses an injection valve, a detector, is realized the detection of NMHC by single injected sampling；Use blowback module quickly to discharge the high boiling substance in the second chromatographic column simultaneously, make high boiling point sample not enter detector detection, be effectively shortened the test period of NMHC, improve accuracy and the analysis efficiency of detection.
Embodiment 2
The NMHC on-line measuring device of this utility model embodiment 1 and the method application in stationary source emission monitoring field.In this application examples, sample gas passage arranges sampling pump, electromagnetic valve, continuous sampling from Concentration in Fixed Pollutants Source；Injection valve is ten-way valve；First quantitative module, the second quantitative module are quantitative loop；First chromatographic column is total hydrocarbon analytical column, and the second chromatographic column is methane analytical column；First carrier gas passage is methane and NMHC analysis stream, and the second carrier gas passage is that methane analyzes stream；Blowback module is arranged on methane and analyzes on stream, including the three-way valve in carrier gas direction in control methane analytical column and the exhaust-valve discharging NMHC；Detector is fid detector, analyzes the carrier gas flux in stream by regulation two so that total hydrocarbon and methane enter detector analysis in different time sections.
Above-mentioned embodiment should not be construed as the restriction to this utility model protection domain.Of the present utility model it is crucial that: use an injection valve, a detector, realized the detection of NMHC by single injected sampling；Blowback module is set simultaneously and improves analysis efficiency.In the case of without departing from this utility model spirit, within any type of change making this utility model all should fall into protection domain of the present utility model.
Claims (5)
1. a NMHC on-line measuring device, including: sample gas passage, two carrier gas passage, two quantitative modules, the first chromatographic column, the second chromatographic columns, it is characterised in that: described on-line measuring device farther includes:
Injection valve, the switching of described injection valve makes described two quantitative modules selectively connect sample gas passage or described two carrier gas passage；
Detector, described detector connects described two carrier gas passage；
Blowback module, described blowback module is disposed therein in the gas circuit of a carrier gas passage.
NMHC on-line measuring device the most according to claim 1, it is characterised in that: described blowback module farther includes:
First electromagnetic valve, described first electromagnetic valve is used for coordinating injection valve, controls the carrier gas direction in the first chromatographic column or the second chromatographic column；
Second electromagnetic valve, described second electromagnetic valve, for coordinating the first electromagnetic valve, discharges material in the first chromatographic column or the second chromatographic column.
NMHC on-line measuring device the most according to claim 1, it is characterised in that: described injection valve is ten-way valve.
NMHC on-line measuring device the most according to claim 2, it is characterised in that: described first electromagnetic valve is three-way valve.
NMHC on-line measuring device the most according to claim 2, it is characterised in that: described second electromagnetic valve is two-port valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521134139.1U CN205449910U (en) | 2015-12-30 | 2015-12-30 | Non -methane total hydrocarbon on -line measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521134139.1U CN205449910U (en) | 2015-12-30 | 2015-12-30 | Non -methane total hydrocarbon on -line measuring device |
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| CN205449910U true CN205449910U (en) | 2016-08-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510478A (en) * | 2015-12-30 | 2016-04-20 | 聚光科技(杭州)股份有限公司 | Online detection device and method of non-methane total hydrocarbon |
| CN107290466A (en) * | 2017-06-16 | 2017-10-24 | 合肥固泰自动化有限公司 | A kind of NMHC instrumentation |
| CN107643352A (en) * | 2017-11-14 | 2018-01-30 | 杭州春来科技有限公司 | NMHC detection means and method |
-
2015
- 2015-12-30 CN CN201521134139.1U patent/CN205449910U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510478A (en) * | 2015-12-30 | 2016-04-20 | 聚光科技(杭州)股份有限公司 | Online detection device and method of non-methane total hydrocarbon |
| CN107290466A (en) * | 2017-06-16 | 2017-10-24 | 合肥固泰自动化有限公司 | A kind of NMHC instrumentation |
| CN107643352A (en) * | 2017-11-14 | 2018-01-30 | 杭州春来科技有限公司 | NMHC detection means and method |
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