CN106950086A - The synchronous sample-leaving system of a kind of gas automatic safety sampling device, on-line monitoring and method - Google Patents
The synchronous sample-leaving system of a kind of gas automatic safety sampling device, on-line monitoring and method Download PDFInfo
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
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Abstract
The invention discloses a kind of gas automatic safety sampling device, the synchronous sample-leaving system of on-line monitoring and method.The gas automatic safety sampling device includes：Pipeline, for conveying gaseous sample；Flowmeter, the flow for measuring sample in pipeline；Three-way magnetic valve, the trend for controlling sample in pipeline, is connected with flowmeter；Needle-valve, the flow for adjusting sample in pipeline, is connected with three-way magnetic valve；Multiple-way valve, for selecting the pipeline that keeps sample, is connected with three-way magnetic valve；Keep sample unit, for retaining sample, is connected with multiple-way valve.The present invention can realize that gas while on-line analysis is carried out, is sampled automatically to required sample；The sample kept sample, can embody the authenticity and representativeness of instant exceeded sample, accurate sample is provided for lab analysis.
Description
Technical field
The invention belongs to gas-monitoring field, and in particular to a kind of gas keeps sample device, on-line monitoring-synchronization sample-leaving system
And method.
Background technology
Harm of the atmosphere pollution to ecological environment and human body has caused the extensive concern of the public, and its emphasis
From the acid rain pollutant matter such as conventional sulfur dioxide, nitrogen oxides, the mists such as present ozone, volatile organic matter have been transferred to
Haze and photochemistry precursor substance.For the atmosphere pollution form that China is severe, except the traditional experiment room method being widely used
Outside, the application of current on-line analysis is also more and more universal.
For standard angle, the on-line analysis (especially volatile organic matter etc.) of gaseous contaminant is at present in state
Interior also quite shortcoming, therefore when being monitored using corresponding online analytical instrument, is typically necessary using traditional experiment room side
Method is compared.After online analytical instrument detects concentration abnormality, it is also desirable to which authoritative institution passes through laboratory standard
Method is verified.The mode mainly taken in current industry is, when being monitored using online analytical instrument, by technology people
Member is individually synchronous to carry out associated sample collecting work；Or after online analytical instrument alarm, scene is gone to by technical staff
Carry out artificial sample.Gas sampling mode conventional at present be more or less required for it is artificial on duty, to ensure sample collection quality.
Gas on-line analyzer device and lab analysis are sampled in different ways, may result in the same of sampling
Step property and uniformity are poor.Mesh first two analysis means are typically all independently to carry out, therefore position and the non-equal of thief hatch,
And the concentration of pollutant has the difference in spatial distribution, for the open environments such as air, wind speed, wind direction,
The many factors such as humiture cause the change on the concentration space of pollutant more violent.
Lab analysis sampling is to need by manually changing sample, i.e., to complete it in a upper sample collection
Afterwards, it is necessary to remove and preserve the sample from sampling apparatus, wherein sampler bag or Soviet Union's agate tank needs to be sealed, and prevents collection
Gas escape, adsorption tube is also required to tighten pipe cap, prevents pollution；Then need to take new sampler bag or adsorption tube to install
On sampling apparatus, the new sampling period could be started.This sample mode is very bothersome laborious, and needs personnel often to look into
See, operate, and the artificial disturbance that can not be ignored can be brought into sampling process.If in addition, online analytical instrument is monitored simultaneously
It is exceeded afterwards, it is necessary to which when that could notify manually to be sampled after instrument alarm, this can undoubtedly miss and adopt to pollutant concentration
Sample opportunity, therefore with serious hysteresis quality.
The content of the invention
In view of the shortcomings of the prior art, present invention firstly provides a kind of gas automatic safety sampling device, sampling process is solved
The problem of middle human attendance and artificial disturbance are polluted to sample.Described device includes：
Pipeline, for conveying gaseous sample；
Flowmeter, the flow for measuring sample in the pipeline；
Three-way magnetic valve, the trend for controlling sample in the pipeline, is connected with the flowmeter；
Needle-valve, the flow for adjusting sample in the pipeline, is connected with the three-way magnetic valve；
Multiple-way valve, for selecting the pipeline that keeps sample, is connected with the three-way magnetic valve；
Keep sample unit, for retaining the sample, is connected with the multiple-way valve.
In some embodiments of the invention, the unit that keeps sample includes two three-way electromagnetic valves, adsorption tube, the adsorption tube point
It is not connected with the multiple-way valve and two three-way electromagnetic valve.
In some embodiments of the invention, the unit that keeps sample includes airbag or Soviet Union's agate tank, the airbag or Soviet Union's agate tank
It is connected with the multiple-way valve.
In some embodiments of the invention, the multiple-way valve includes base and upper lid,
The base is provided with sample inlet, sample export, center hole and circular hole, and the sample inlet is respectively with described three
Three-way electromagnetic valve is connected with the center hole, and the sample export keeps sample unit and the circular hole is connected with described respectively；
The upper lid is rotatable, and provided with a vertically hung scroll to groove, the width is used for the center for connecting the base to groove
Circular hole and circular hole.
In some embodiments of the invention, the thickness of the multiple-way valve base is 1-1.5cm, the radius of the multiple-way valve
For 2.5-3.5cm.
In some embodiments of the invention, the length of the pipeline between the multiple-way valve and the three-way magnetic valve is 5-
10cm, the length of the pipeline between the multiple-way valve and the unit that keeps sample is 20-30cm.
In some embodiments of the invention, the pipeline is made up of passivation stainless steel.
Present invention also offers a kind of gas on-line monitoring-synchronization sample-leaving system, laboratory collection sample can be solved
The problem of product are with on-line analysis sample while property and uniformity.The system includes：
Sampling apparatus, for gathering gaseous sample；
Triple valve, for shunting, is connected with the sample devices；
On-line analysis device, for detecting, analyzing gas, is connected with the triple valve；
Above-mentioned automatic safety sampling device, for entrapped gas, is connected with the triple valve.
Further, present invention also offers a kind of side kept sample using said system progress gas on-line monitoring-synchronization
Method.Methods described comprises the following steps：
Set up acquisition channel；
Gather gaseous sample using the sampling apparatus, and by the sample by the triple valve be respectively fed to it is described
Line analysis device and the automatic safety sampling device；
The sample is detected using the on-line analysis device, and testing result is analyzed and processed；
Switch the three-way magnetic valve and multiple-way valve of the automatic safety sampling device, by the unit that keeps sample described in sample feeding；
Adjust the needle-valve of the automatic safety sampling device, make the reading of the flowmeter the multiple-way valve center hole with
Keep constant before and after circular hole connection.
The automatic safety sampling device that the present invention is provided can realize that the automatic of multiple samples keeps sample, it is ensured that right in longer cycle
The quantitative requirement of sample collection, enhances its automaticity and relevance measure.The unit that keeps sample of the automatic safety sampling device can
To use different sample collecting apparatus, including gaseous state, Soviet Union agate tank and adsorption tube etc..
The gas on-line monitoring that the present invention is provided-synchronization sample-leaving system high degree of automation, can realize that gas is being carried out
While line analysis, required sample is sampled automatically.Combination can be divided according to the tested project of difference and measurement frequency, entered
Flexibly selection is set row, so as to reach the purpose for repetition measurement of sampling, analyze and keep sample respectively.
The sample that present system keeps sample, can embody the authenticity and representativeness of instant exceeded sample, be lab analysis
Accurate sample is provided.
Brief description of the drawings
Fig. 1 be the embodiment of the present invention in a kind of gas automatic safety sampling device structural representation；
Fig. 2 be the embodiment of the present invention in a kind of gas automatic safety sampling device multiple-way valve structural representation；
Fig. 3 be the embodiment of the present invention in a kind of gas on-line monitoring-synchronization sample-leaving system structural representation；
Fig. 4 is that sample moves towards schematic diagram under normal monitoring pattern；
Fig. 5 is that on-line monitoring-synchronization sample-leaving system sample in the case where on-line monitoring-synchronization keeps sample pattern moves towards schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the embodiment to the present invention is described in more details, so as to energy
Enough more fully understand the solution of the present invention and the advantage of its various aspects.However, specific embodiments described below and reality
It is only descriptive purpose to apply example, rather than limitation of the present invention.
As shown in figure 1, the gas automatic safety sampling device that provides of the present invention include pipeline, flowmeter 11, three-way magnetic valve 12,
Needle-valve 13, multiple-way valve 14 and the unit 15 that keeps sample.
Pipeline is used to convey gaseous sample.Flowmeter 11, the flow for measuring sample in pipeline.Three-way magnetic valve 12 is used
The trend of sample, is connected with flowmeter 11 in control pipeline.Needle-valve 13 is used for the flow for adjusting sample in pipeline, is powered with three
Magnet valve 12 is connected.Multiple-way valve 14 keeps sample pipeline for selection, is connected with three-way magnetic valve 12.The unit 15 that keeps sample is used to retain described
Sample, is connected with multiple-way valve 14.
The unit 15 that keeps sample of gas automatic safety sampling device shown in Fig. 1 includes multiple (for convenience of explanation, hereinafter by it
It is designated as n) 151 and two three-way electromagnetic valve 152 of adsorption tube, adsorption tube 151 is connected with the three-way electromagnetic valve 152 of multiple-way valve 14 and two respectively.
Adsorption tube 151 is used to fill sample, and two three-way electromagnetic valves 152 are for exhaust when keeping sample and protect adsorption tube 151 from pollution.
In other embodiments of the invention, the three-way electromagnetic valve 152 of adsorption tube 151 and two can be replaced by airbag or Soviet Union's agate
Tank.
The present invention selects the pipeline that keeps sample using multiple-way valve 14, and Fig. 2 is a kind of preferred multiple-way valve in the embodiment of the present invention
Structural representation.Fig. 2 (1) show the base of multiple-way valve 14, and base is fixed.Wherein, base (is schemed provided with sample inlet
In a), sample export (b1, b2 i.e. in figure, do not mark completely) and center hole (d i.e. in figure).Dotted line in Fig. 2 (1)
Inner circle is setting circle, and round dot (two, c1, c2 are illustrate only in figure) thereon is circular hole.In Fig. 2 (1) solid black lines (i.e. a,
Connecting line between d, the connecting line between b, c) to represent coupling part be connection, sample can pass through.That is, sample inlet a
Be connected respectively with three-way magnetic valve 12 and center hole d, sample export (b1, b2 etc.) respectively with keep sample unit 15 and circular hole (c1,
C2 etc.) it is connected.Fig. 2 (2) show the upper lid of multiple-way valve 14, and its is rotatable, and (as black in figure to groove provided with a vertically hung scroll
Color solid line), center hole (d) and circular hole (c1, c2) that width is used to connect base to groove etc..Fenestra in dotted line in Fig. 2 (2)
For setting circle.
The sample come out from three-way magnetic valve 12 is entered by sample inlet a, reaches center hole d, then pass through the width of upper lid
Circular hole c1 (or c2 etc.) is reached to groove, sample export b1 (or b2 etc.) is then reached again, into the unit 15 that keeps sample.Need explanation
, multiple-way valve of the invention is not limited to said structure, as long as the selection and switching for the pipeline that keeps sample can be realized.
Interfering between each sample when keeping sample in order to be able to reduce, in a preferred embodiment of the invention, multiple-way valve
The thickness of base 14 is 1-1.5cm, and radius is 2.5-3.5cm.It is highly preferred that the pipe between multiple-way valve 14 and three-way magnetic valve 12
The length of line is 5-10cm, and the length of the pipeline between multiple-way valve 14 and the unit 14 that keeps sample is 20-30cm.
Adsorb or parse to prevent the tube wall of pipeline from being produced to sample, the pipeline that the present invention provides automatic safety sampling device is excellent
Choosing is prepared using passivation stainless steel.In addition, when pipeline is when material is passivation stainless steel tube, multiple-way valve 14 and three-way magnetic valve 12
Between pipeline length and multiple-way valve 14 and the unit 14 that keeps sample between pipeline length to the interference very little of sample, now manage
The length of line can change as needed.
The automatic safety sampling device that the present invention is provided can realize that the automatic of multiple samples keeps sample, it is ensured that right in longer cycle
The quantitative requirement of sample collection, enhances its automaticity and relevance measure.
As shown in figure 3, gas on-line monitoring-synchronization sample-leaving system that the present invention is provided includes：Automatic safety sampling device 1,
Line analysis device 2, triple valve 3 and sampling apparatus 4.
Sampling apparatus 4 is used to gather gaseous sample；In the preferred embodiment of the invention, sampling apparatus is sampling pump.Three
Port valve 3 is used to shunt, and is connected with sample devices 4.On-line analysis device 2 is used to detect, analyze gas, is connected with triple valve 3；
In the preferred embodiment of the invention, on-line analysis device is mass spectrograph.Automatic safety sampling device 1 is used for entrapped gas, with triple valve 3
It is connected；The concrete structure of automatic safety sampling device shown in Fig. 3 is as shown in Figure 1.
Gas on-line monitoring-synchronization sample-leaving system that the present invention is provided has two kinds of mode of operations：Normal monitoring pattern and
Line monitoring-synchronization keeps sample pattern.Fig. 4 is that sample moves towards schematic diagram under normal monitoring pattern；Fig. 5 stays for on-line monitoring-synchronization
Sample moves towards schematic diagram under original mold formula.
As shown in figure 4, under normal monitoring pattern, the collection sample of sampling apparatus 4, after sample is shunted by triple valve 3, one
Part enters on-line analysis device 2, and on-line analysis device 2 is detected to sample, and testing result is analyzed and processed；Separately
A part passed sequentially through and emptied after flowmeter 11, three-way magnetic valve 12 and needle-valve 13.Now three-way magnetic valve 12 and multiple-way valve 14
The part of connection is closed, and multiple-way valve 14 is in home position (the i.e. circular hole (c1, c2 etc.) of multiple-way valve 14 and center hole d is not
Connection).In Fig. 4, two three-way electromagnetic valves 152 are also at closed mode, protect adsorption tube not by outside contamination.
As shown in figure 5, keeping sample in on-line monitoring-synchronization under pattern, the collection sample of sampling apparatus 4, sample passes through triple valve 3
After shunting, on-line analysis device 2 is partly into, on-line analysis device 2 is detected to sample, and testing result is divided
Analysis is handled；The upper lid of rotary multi-way valve 14, makes the center hole of multiple-way valve 14 be connected with circular hole c1, another part sample leads to successively
Excessively stream gauge 11, three-way magnetic valve 12, multiple-way valve 14 enter the unit 15 that keeps sample.After the completion of first adsorption tube dress sample, to
End keeps sample, you can switching three-way magnetic valve 12, closes the connecting path of three-way magnetic valve 12 and multiple-way valve 14.If also need to after
It is continuous to keep sample, switch multiple-way valve 14, its center hole d is connected with circular hole c2, sample enters second adsorption tube.The like,
Until the completion that keeps sample.
In order to which the vapour lock in the pipeline that ensures to keep sample is consistent, sample size is consistent and the uniformity of collection volume, supervising online
Survey-synchronization keeps sample under pattern, and needle-valve 13 need to be adjusted so that before and after the center hole of multiple-way valve 14 is connected with circular hole, stream
The reading of gauge 11 is consistent.So it is also ensured that the vapour lock in the pipeline that keeps sample under different mode is also consistent.
That is, the method kept sample using said system progress gas on-line monitoring-synchronization is comprised the following steps：
Set up acquisition channel；
Gaseous sample is gathered using sampling apparatus 4, and sample is respectively fed to the He of on-line analysis device 2 by triple valve 3
Automatic safety sampling device 1；
Sample is detected using on-line analysis device 2, and testing result is analyzed and processed；
Switch the three-way magnetic valve 12 and multiple-way valve 14 of automatic safety sampling device 1, sample is sent into the unit 15 that keeps sample；
The needle-valve 13 of automatic safety sampling device is adjusted, makes the reading of flowmeter 11 in the center hole d and circular hole of multiple-way valve 14
Keep constant before and after (c1, c2 etc.) connection.
In summary, the automatic safety sampling device that provides of the present invention can realize that the automatic of multiple samples keeps sample, it is ensured that compared with
To the quantitative requirement of sample collection in long period, its automaticity and relevance measure are enhanced.The automatic safety sampling device
The unit that keeps sample can use different sample collecting apparatus, including gaseous state, Soviet Union agate tank and adsorption tube etc..
The gas on-line monitoring that the present invention is provided-synchronization sample-leaving system high degree of automation, can realize that gas is being carried out
While line analysis, required sample is sampled automatically.Combination can be divided according to the tested project of difference and measurement frequency, entered
Flexibly selection is set row, so as to reach the purpose for repetition measurement of sampling, analyze and keep sample respectively.
The sample that present system keeps sample, can embody the authenticity and representativeness of instant exceeded sample, be lab analysis
Accurate sample is provided.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and simultaneously
The non-restriction to embodiment.For those of ordinary skill in the field, it can also do on the basis of the above description
Go out other various forms of changes or variation.There is no necessity and possibility to exhaust all the enbodiments.And thus drawn
Among the obvious change or variation that Shen goes out are still in protection scope of the present invention.
Claims (9)
1. a kind of gas automatic safety sampling device, it is characterised in that described device includes：
Pipeline, for conveying gaseous sample；
Flowmeter, the flow for measuring sample in the pipeline；
Three-way magnetic valve, the trend for controlling sample in the pipeline, is connected with the flowmeter；
Needle-valve, the flow for adjusting sample in the pipeline, is connected with the three-way magnetic valve；
Multiple-way valve, for selecting the pipeline that keeps sample, is connected with the three-way magnetic valve；
Keep sample unit, for retaining the sample, is connected with the multiple-way valve.
2. automatic safety sampling device according to claim 1, it is characterised in that it is described keep sample unit including two three-way electromagnetic valves,
Adsorption tube, the adsorption tube is connected with the multiple-way valve and two three-way electromagnetic valve respectively.
3. automatic safety sampling device according to claim 1, it is characterised in that the unit that keeps sample includes airbag or Soviet Union's agate
Tank, the airbag or Soviet Union's agate tank are connected with the multiple-way valve.
4. automatic safety sampling device according to claim 1, it is characterised in that the multiple-way valve includes base and upper lid,
The base is provided with sample inlet, sample export, center hole and circular hole, and the sample inlet is powered with described three respectively
Magnet valve is connected with the center hole, and the sample export keeps sample unit and the circular hole is connected with described respectively；
The upper lid is rotatable, and provided with a vertically hung scroll to groove, the width is used for the center hole for connecting the base to groove
And circular hole.
5. automatic safety sampling device according to claim 4, it is characterised in that the thickness of the multiple-way valve base is 1-
1.5cm, the radius of the multiple-way valve is 2.5-3.5cm.
6. automatic safety sampling device according to claim 5, it is characterised in that the multiple-way valve and the three-way magnetic valve it
Between the length of pipeline be 5-10cm, the length of the pipeline between the multiple-way valve and the unit that keeps sample is 20-30cm.
7. automatic safety sampling device according to claim 1, it is characterised in that the pipeline is made up of passivation stainless steel.
8. a kind of gas on-line monitoring-synchronization sample-leaving system, it is characterised in that the system includes：
Sampling apparatus, for gathering gaseous sample；
Triple valve, for shunting, is connected with the sample devices；
On-line analysis device, for detecting, analyzing gas, is connected with the triple valve；
Any described automatic safety sampling device, for entrapped gas, is connected with the triple valve in claim 1-7.
9. a kind of system using described in claim 8 carries out the method that gas on-line monitoring-synchronization keeps sample, it is characterised in that
Methods described comprises the following steps：
Set up acquisition channel；
Gaseous sample is gathered using the sampling apparatus, and the sample is respectively fed to described online point by the triple valve
Analysis apparatus and the automatic safety sampling device；
The sample is detected using the on-line analysis device, and testing result is analyzed and processed；
Switch the three-way magnetic valve and multiple-way valve of the automatic safety sampling device, by the unit that keeps sample described in sample feeding；
The needle-valve of the automatic safety sampling device is adjusted, makes the reading of the flowmeter in the center hole and circular hole of the multiple-way valve
Kept before and after connection constant.
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| CN201710103700.7A CN106950086B (en) | 2017-02-24 | 2017-02-24 | A kind of gas automatic safety sampling device, on-line monitoring-synchronization sample-leaving system and method |
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| CN108956217A (en) * | 2018-09-28 | 2018-12-07 | 四川省天晟源环保股份有限公司 | A kind of novel SOIL GAS collection and detection device |
| CN110567764A (en) * | 2019-09-19 | 2019-12-13 | 山东圣文环保科技有限公司 | outdoor air quality monitoring device who possesses sample collection and stores function |
| CN112204392A (en) * | 2018-05-29 | 2021-01-08 | 沃特世科技公司 | On-line sample manager |
| WO2021089024A1 (en) * | 2019-11-06 | 2021-05-14 | O'Grands Innovation Inc. | A method for continuous detection of multi-channel gas samples |
| CN114252581A (en) * | 2020-09-25 | 2022-03-29 | 津海威视技术(天津)有限公司 | Ore on-line measuring system |
| CN114371256A (en) * | 2021-12-06 | 2022-04-19 | 江苏维尤纳特精细化工有限公司 | One set is used for online exhaust gas monitoring device of chlorothalonil industrial production |
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| CN106950086B (en) | 2019-06-14 |
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