CN107328618A - A kind of sampling system for apparatus assembly volatile organic matter - Google Patents
A kind of sampling system for apparatus assembly volatile organic matter Download PDFInfo
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- CN107328618A CN107328618A CN201710789929.0A CN201710789929A CN107328618A CN 107328618 A CN107328618 A CN 107328618A CN 201710789929 A CN201710789929 A CN 201710789929A CN 107328618 A CN107328618 A CN 107328618A
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- sampling
- apparatus assembly
- bag
- organic matter
- volatile organic
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N1/24—Suction devices
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Sampling And Sample Adjustment (AREA)
Abstract
The present invention relates to a kind of sampling system for apparatus assembly volatile organic matter.Sampling system includes sealing device and sampling box, device is sealed mainly to seal apparatus assembly with sealing bag, zero gas, the flowmeter of device front end are sealed including being arranged on, seal and seal bag, titanium teflon tube, valve, pressure gauge and thermometer etc. on apparatus main body, sampling box includes vacuum sampling box, sampler bag, aspiration pump, screw thread nut etc..Purged by zero gas to sealing the volatile organic matter that the apparatus assembly in device is leaked, will seal system end titanium teflon tube after the system that seals is stable is connected to sampling box, and sampling box carries out sampler bag sampling indirectly by aspiration pump.Present invention is specifically directed to the sampling of apparatus assembly volatile organic matter, current present situation of the apparatus assembly method of sampling without concrete norm is solved, a kind of effective method is provided for the sampling of apparatus assembly.
Description
The inventive method is related to a kind of sampling system for apparatus assembly volatile organic matter, belongs to volatile organic matter
Monitoring technical field.
Background technology
During petrochemical industry, Production in Chemical Plant plant running, the sealing position such as its equipment and pipe valve is often let out
Leakage and the loss of VOC (VOCs), both cause to pollute environment, cause production and processing material (especially light again
Hydrocarbon component) loss, judge petrochemical industry, chemical industry apparatus assembly leakage rate, it is necessary to accurate to sample and determine volatile organic matter
Concentration.
The country is at present in stationary source volatile organic matter gas sampling method《Stationary source waste gas volatile organic matter
Sampling airbag method》Discharge duct is entered by thief hatch with heating sampling pipe in (HJ 732-2014), had while being also not known
Sampling apparatus and method used in body；Apparatus assembly is all in seal flow state in petrochemical industry, chemical industry continuous flow procedure,
It can not arbitrarily be open and be sampled, directly be used by sampling pipe on apparatus assembly surface, but it is true with apparatus assembly leakage
There is larger gap in real value.
The content of the invention
For above-mentioned problem, it is an object of the invention to provide a kind of for apparatus assembly volatile organic matter
Sampling system, the system architecture is simple, is capable of the leakage concentration of accurate collecting device component.
To achieve the above object, technical program of the present invention lies in：A kind of adopting for apparatus assembly volatile organic matter
Sample system, it includes sealing device and sampling box, it is described seal device by zero gas, suspended body flowmeter, titanium teflon tube, valve, enclose
Envelope, apparatus assembly, super adhesive tape, thermojunction type thermometer, digital U-tube manometer, suspended body flowmeter composition；The sampling
Screw thread nut, sampler bag, vacuum sampling box, aspiration pump are set on case, and the screw thread nut matches with sampling bag interface to be connected.
It is preferred that, the pressure gauge on zero source of the gas (1) pressure-reducing valve is less than the flow of the suspended body flowmeter
1000ml/s。
It is preferred that, described bag (6) material that seals is Mylar film.
It is preferred that, the device that seals has 2 air inlets, 1 gas outlet, and air inlet/outlet connected mode is Y or T-shaped modes
Connection.
It is preferred that, the thermojunction type thermometer 10, the connecting line of digital U-tube manometer 11 or pipe use super sticky glue in the lump
Band or band make to seal bag closely to be sealed with apparatus assembly.
It is preferred that, the bag device front end suspended body flowmeter 3 and rear end suspended body flowmeter 12 should as close possible to or phase
Deng.
It is preferred that, the device that seals keeps sealing pressure-fired in bag (pressure is no more than 0.00689MPa in bag) preventing
Outside air enters, and record seals bag full of the required time.
It is preferred that, the device that seals is continually fed into nitrogen, after ventilation volume seals bag more than 5 times full of volume, with
Portable its concentration of VOC analysis-e/or determining is simultaneously recorded, and the TVOC concentration sealed in bag is not more than portable volatilization
Property organic gas analyzer maximum range scope, otherwise should increase nitrogen flow.
It is preferred that, described to seal TVOC concentration in device and reach after dynamic equilibrium, (detected value per second, which changes, in 1min exists
Within 10%), vacuum sampling box 15 is opened, titanium teflon tube is connected to screw thread nut 13, sampling airbag is installed to screw thread nut,
Open aspiration pump 16 and carry out indirect sampler bag sampling.
It is preferred that, vacuum sampling box 15 is black or brown, and leaves peep hole.
Inventor has found that a kind of sampling for apparatus assembly volatile organic matter provided by the present invention is examined after experiment
Survey method and detection means have the advantages that：Sample, directly can be enclosed with sealing bag without apparatus assembly is opened
Envelope apparatus assembly is sampled, so as to the volatile organic matter leakage rate of real sensing equipment component, it is ensured that follow-up
The accuracy of measurement.
Brief description of the drawings
Fig. 1 is the structural representation of an embodiment of the present invention.
Specific embodiment
The present invention is further discussed below with reference to example, but does not therefore limit the present invention to described scope of embodiments
Among.
Fig. 1 shows a kind of structural representation of the sampling system for apparatus assembly volatile organic matter, sampling system
Including sealing device and sampling box；It is described seal device by zero gas 1, suspended body flowmeter 3, titanium teflon tube 4, valve 5, seal bag 6,
Apparatus assembly 7, super adhesive tape 8, thermojunction type thermometer 10, digital U-tube manometer 11, suspended body flowmeter 12 are constituted, described to enclose
Connection flow gauge before and after seal apparatus；Screw thread nut 13, sampler bag 14, vacuum sampling box 15, aspiration pump are set on the sampling box
16, the screw thread nut 13 matches with sampling bag interface to be connected.
In the system, the pressure gauge 2 on the control pressure-reducing valve of zero source of the gas 1 makes the flow of suspended body flowmeter 3 be less than 1000ml/
s。
According to the type and size of apparatus assembly, cutting can seal apparatus assembly completely and shape size is suitably sealed
Bag, seals the material of bag 6 for Mylar films.
Specifically, the bag that seals of cutting is made a call into three holes with card punch, two of which air inlet a, venthole is tried one's best
Make the position of venthole on the opposite of air admission hole and on the axis of two air admission holes.The PTFE of three hole shimmings is (poly-
Tetrafluoroethene) valve 5 connects, in case convenient connection Teflon pipes 4, while by thermojunction type thermometer 10, digital U-tube manometer
11 connecting line is managed to make to seal bag with super adhesive tape or band in the lump and closely sealed with apparatus assembly, is connected and is sealed bag
PTFE tube is connected using Y or T modes, allow zero gas by three-way pipe with 2 pipe shunting modes import seal in bag, venthole also with
PTFE tube is connected to suspended body flowmeter 12.
Bag device front end suspended body flowmeter 3 and rear end suspended body flowmeter 12 should as close possible to or it is equal, this part can
Device seal is sealed as detection device component.
Device is sealed to keep sealing pressure-fired in bag (pressure is no more than 0.00689MPa in bag) preventing outside air from entering
Enter, record seals bag full of the required time；Seal device and be continually fed into nitrogen, sealing bag more than 5 times in ventilation volume is full of
After volume, with portable its concentration of VOC analysis-e/or determining and record, the TVOC concentration sealed in bag is not more than
Portable VOC analyzer maximum range scope, otherwise should increase by zero throughput.
Seal TVOC concentration in device to reach after dynamic equilibrium, (detected value per second is changed within 10% in 1min) beats
Vacuum sampling box is opened, titanium teflon tube is connected to screw thread nut, sampling airbag is installed to screw thread nut, aspiration pump is opened and enters in the ranks
Connect sampler bag sampling.
Because photochemical reaction easily occurs under the irradiation of light for volatile organic matter, should be use up during collection volatile organic matter can
The lucifuge of energy, therefore, vacuum sampling box 15 are black or brown, and leave peep hole.
To improve the true and accurate of gathered data, in the case where bag sampling system is stable, to an apparatus assembly
Bag seal 2-3 sample to be gathered, analysis result takes the average value of collection sample.
Claims (10)
1. a kind of sampling system for apparatus assembly volatile organic matter, it is characterised in that the sampling system includes sealing
Device and sampling box；It is described seal device by zero gas (1), suspended body flowmeter (3), titanium teflon tube (4), valve (5), seal bag
(6), apparatus assembly (7), super adhesive tape (8), thermojunction type thermometer (10), digital U-tube manometer (11), suspended body flowmeter
(12) it is connected to form, it is described to seal connection flow gauge before and after device；Screw thread nut (13), sampler bag are set on the sampling box
(14), vacuum sampling box (15), aspiration pump (16), the screw thread nut (13) matches with sampling bag interface to be connected.
2. the sampling system of apparatus assembly volatile organic matter as claimed in claim 1, it is characterised in that zero source of the gas
(1) pressure gauge (2) on pressure-reducing valve, makes the flow of the suspended body flowmeter (3) be less than 1000ml/s.
3. the sampling system of apparatus assembly volatile organic matter as claimed in claim 1, it is characterised in that described to seal bag
(6) material is Mylar films.
4. the sampling system of the apparatus assembly volatile organic matter as described in claim 1 or 3, it is characterised in that described to seal
Device has 2 air inlets, 1 gas outlet, and air inlet/outlet connected mode is that Y or T-shaped modes are connected.
5. the sampling system of apparatus assembly volatile organic matter as claimed in claim 1, it is characterised in that the thermojunction type
Thermometer, the connecting line of digital U-tube manometer are managed in the lump with super adhesive tape or band (8) makes to seal bag and apparatus assembly is tight
It is close to seal.
6. the sampling system of apparatus assembly volatile organic matter as claimed in claim 1, it is characterised in that the bag device
Front end suspended body flowmeter (3) and rear end suspended body flowmeter (12) should as close possible to or it is equal.
7. the sampling system of apparatus assembly volatile organic matter as claimed in claim 1, it is characterised in that described to seal device
Holding seals pressure-fired in bag (pressure is no more than 0.00689MPa in bag) to prevent outside air from entering, and record seals bag and is full of
The required time.
8. the sampling system of apparatus assembly volatile organic matter as claimed in claim 7, it is characterised in that described to seal device
Nitrogen is continually fed into, after ventilation volume seals bag more than 5 times full of volume, is surveyed with portable VOC analyzer
Its fixed concentration is simultaneously recorded, and is sealed the TVOC concentration in bag and is not more than portable VOC analyzer maximum range model
Enclose, otherwise should increase nitrogen flow.
9. the sampling system of apparatus assembly volatile organic matter as claimed in claim 6, it is characterised in that described to seal device
Interior TVOC concentration reaches after dynamic equilibrium that (detected value per second is changed within 10% in 1min) opens vacuum sampling box, by titanium
Teflon tube is connected to screw thread nut, installs sampling airbag to screw thread nut, opens aspiration pump and carries out indirect sampler bag sampling.
10. the sampling system of apparatus assembly volatile organic matter as claimed in claim 1, it is characterised in that vacuum sampling box
(15) it is black or brown, and leaves peep hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710789929.0A CN107328618A (en) | 2017-09-04 | 2017-09-04 | A kind of sampling system for apparatus assembly volatile organic matter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710789929.0A CN107328618A (en) | 2017-09-04 | 2017-09-04 | A kind of sampling system for apparatus assembly volatile organic matter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107328618A true CN107328618A (en) | 2017-11-07 |
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ID=60204489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710789929.0A Pending CN107328618A (en) | 2017-09-04 | 2017-09-04 | A kind of sampling system for apparatus assembly volatile organic matter |
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| Country | Link |
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| CN (1) | CN107328618A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051285A (en) * | 2017-12-15 | 2018-05-18 | 宁波环测实验器材有限公司 | A kind of sack method VOC pretreating devices and its application method |
| CN109839247A (en) * | 2019-03-07 | 2019-06-04 | 环境保护部环境工程评估中心 | Bag detection device, leak detection system and method |
-
2017
- 2017-09-04 CN CN201710789929.0A patent/CN107328618A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051285A (en) * | 2017-12-15 | 2018-05-18 | 宁波环测实验器材有限公司 | A kind of sack method VOC pretreating devices and its application method |
| CN109839247A (en) * | 2019-03-07 | 2019-06-04 | 环境保护部环境工程评估中心 | Bag detection device, leak detection system and method |
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Addressee: Zheng Xingcheng Document name: Notification of before Expiration of Request of Examination as to Substance |
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Application publication date: 20171107 |
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