CN203643409U - Tester for testing sampling efficiency of volatile organic compound in air - Google Patents
Tester for testing sampling efficiency of volatile organic compound in air Download PDFInfo
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- CN203643409U CN203643409U CN201320758656.0U CN201320758656U CN203643409U CN 203643409 U CN203643409 U CN 203643409U CN 201320758656 U CN201320758656 U CN 201320758656U CN 203643409 U CN203643409 U CN 203643409U
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Abstract
The utility model belongs to the field of environment monitoring and particularly relates to a tester for testing the sampling efficiency of a volatile organic compound in air. The device comprises a steel bottle I, a plurality of steel bottles II, a temperature-humidity control device, a dynamic blending device and sampling-adsorbing devices, wherein the steel bottle I and the steel bottles II are respectively connected with one end of the temperature-humidity control device in parallel, the other end of the temperature-humidity control device is connected with the dynamic blending device in series, and the other end of the dynamic blending device is connected with the sampling-adsorbing devices in parallel. The tester has the beneficial effects that the structure is simple, and an air pump is omitted; by virtue of the temperature-humidity control device, the temperature and humidity of air can be controlled in a certain range or at specific temperature or humidity, so that a detection result is accurate; the application range is wide, and the sampling efficiencies of gases sampled in various sampling manners can be detected; the adsorption efficiency of an adsorbent can be further accurately calculated, and a proper adsorbent and a proper sampling method can be selected.
Description
Technical field
The utility model belongs to environmental monitoring technology field, is specifically related to a kind of volatile organic matter in air sampling efficiency proving installation.
Background technology
At present, have successively standard method of analysis to put into effect for the determination techniques of volatile organic matter in environmental protection industry (epi) air and waste gas, but method itself mainly emphasize analytical approach, and for standard, the method of sampling is also the most important thing, because the error of sampling is far longer than analytical error.Why these standards are not paid attention to the method for sampling, not because do not know the importance of the method for sampling, do not have suitable sampling testing efficiency device to go simulated field when sampling sampling efficiency problem but suffer from, thus these standards shirk the heavy work and choose the light ignored the method for sampling.This be also greatly in environmental protection industry (epi) air and waste gas volatile organic matter standard put into effect few and major reason slowly.
Can comply with without environmental protection standard method and in environmental protection industry (epi) air and waste gas, the mensuration of volatile organic matter occurs, most method is according to the mensuration of volatile organic matter in the serial workplace of the occupational health standard GBZ of country of the People's Republic of China (PRC) of issuing for Ministry of Health of the People's Republic of China.Although this standard comparatively comprehensively and system, method itself is comparatively coarse, let alone consideration to sampling efficiency, and as the reference of environmental protection standard, it is also a unknown number that the reference of itself and effect have much.
The national standard analytical approach of organic poison in the current used air of workplace of China, the sampling of collecting sample with activated carbon tube increases just increasingly, the sampling that common are machine steam and compound thereof is progressively adsorbed by absorption liquid or the syringe sampling of former use the solid adsorbent that power is very strong, and as activated charcoal, silica gel etc., institute replaces.According to document announcement, in the air that U.S. OSHA and NIOSH promulgate in the monitoring method of organic vapor application of active carbon adsorbent sampler reached hundreds of more than, account for the more than 60% of its whole monitoring method.Be enough to thus illustrate that activated charcoal is being very wide as the application aspect of solid adsorbent.
At present, in air, gather gaseous sample and generally adopt initiatively Sampling techniques, use atmosphere comprehensively sampling device (built-in motor, as the source of power, adds the speed of flowmeter control sampling) and sampling adsorbent to complete the collection of sample.Sampling adsorbent mainly contains activated charcoal, silica gel, resin and absorption liquid etc.Although these selecteed adsorbents are to have best adsorption effect theoretically, also tested mistake has good effect, but the process of sampling absorption is a complicated process, the effect quality of absorption is determined by several factors, comprises that capacity etc. is disturbed and penetrates in meteorological condition, the capacity of adsorbent, the sampling of gas temperature humidity, sampling flow velocity, sampling time, sampling.The collection of wanting at present to simulate actual sample is very difficult, and also high (with a room as source of the gas) of cost, does not substantially have a kind of method to realize.
Penetrating capacity (BTV) test is the characteristic index of activated carbon tube sampling, in order definitely to seek, activated carbon tube can be applicable to the impact of on-the-spot different humidity temperature and the calibrating gas of various variable concentrations is sampled (as high concentration, high humility) time, BTV data are very important.Conventionally, BTV data depend on that the adsorptive power of adsorbent itself variation with field environmental condition change.BTV is less, limited by the sampling time, can not react on-the-spot actual concentration, and sampling representativeness is poor.Otherwise BTV is larger, the scene of centering, high concentration is not more subject to the restriction of time, and sample test result is representative strong, and can reflect strictly according to the facts the distribution situation of on-the-spot variable concentrations.The utility model can be simulated the various requirement that penetrates capacity test completely, and concentration can arbitrary disposition, and sampling time and sampling quantity are enough, and on-the-spot environmental baseline humiture is as long as just once arrange and can realize cushioning gas and changing in stainless steel cylinder.
At present, in environmental monitoring, while carrying out analog acquisition for the collecting efficiency test of volatile organic matter in air, often adopt large polybag or vent cabinet to be equipped with the device of air sampler.There is at present larger shortcoming in these sampling apparatuses, as:
(1) build the system of combination, the running time is long, poor stability temporarily;
(2) once the volume of sampling is fixed, and the volume of large polybag or vent cabinet is sampling volume (large polybag volume 10-20L in laboratory, vent cabinet volume 100-200L), and sampling volume cannot be changed according to the actual requirements;
(3) large polybag or vent cabinet sampling, gas reduces formation negative pressure not to be considered, causes sampling rate inhomogeneous;
(4) large polybag or vent cabinet sampling, gas mixes operating difficulties;
(5) large polybag or vent cabinet temperature, humidity is difficult to control, and is difficult to reach simulated field sampling condition.Therefore need to improve for above-mentioned shortcoming, design a kind of efficiency test device that can better simulate actual samples work, being convenient to staff has more accurately and understands for the sample of actual acquisition.
Summary of the invention
For solving the problems of the technologies described above, the utility model provides a kind of volatile organic matter in air sampling efficiency proving installation simple in structure, easy to use;
The method of traditional sampling efficiency test solves conventionally in two ways, and the one, large polybag or vent cabinet sampling, this mode gas production volume cannot be simulated with actual conditions, and meteorologic parameter more cannot be mated, and poor stability is not had a science.The 2nd, the mode that directly adds liquid standard specimen is to adsorbent, and this mode more cannot characterize the adsorptive power under adsorbent actual conditions, does not also have a science.And this device actual be the sampling usefulness of really simulating adsorbent in actual samples situation, during such as sampling, the humidity of gas production gas is a very important parameter, by test adsorbent usefulness, suppose that 90% humidity is when above, adsorbent usefulness obviously declines, and will avoid this high humility situation down-sampling when that actual samples, must be to sample gas processing, its temperature and humidity is remained in certain scope, to improve the accuracy of testing result.
Volatile organic matter in air sampling efficiency proving installation of the present utility model is realized by following technical proposals:
Volatile organic matter in air sampling efficiency proving installation, this device comprises the steel cylinder I that stores diluents, the steel cylinder II of multiple storage standards gases, temperature humidity control device, dynamically evenly mixing device, multiple sampling adsorbent equipments;
Steel cylinder I, steel cylinder II are in parallel with one end of temperature humidity control device respectively; The other end of temperature humidity control device is connected in series mutually with dynamic evenly mixing device, and dynamically the other end of evenly mixing device is parallel with multiple sampling adsorbent equipments;
Between above-mentioned steel cylinder I, steel cylinder II, temperature humidity control device, dynamic evenly mixing device and sampling adsorbent equipment, be all connected by pipeline;
Between steel cylinder I and temperature humidity control device, between steel cylinder II and temperature humidity control device, temperature humidity control device and dynamically between evenly mixing device, dynamically evenly mixing device all has flowmeter between adsorbent equipment with sampling;
Temperature humidity control device comprises stove case, the bottom having heaters of stove case, and humidifier is arranged at the top of stove case, and the puff prot of described humidifier is positioned at stove case inside, on the outer wall of stove case, has fan; Humidifier adopts ultrasonic atomizing humidifier, and water vapour generation efficiency is high, and the time is short, by the amount that regulates the uninterrupted control water vapor of water to produce, between humidity range of control 0-95%;
The main body of above-mentioned dynamic evenly mixing device is the stainless steel cylinder that stainless steel is made, and its inside, through electronics polishing grinding and deactivation processing, prevents from absorption and be easy to cleaning, and prevents from addition seeing that the labile gas of light decomposes;
Dynamically there is stirrer evenly mixing device inside, and the gas that enters dynamic evenly mixing device is mixed again by stirrer therein, ensures that the gas that dynamically mixes system reaches the requirement needing.
Above-mentioned pipeline is copper pipe, and copper pipe is high-purity copper material, and inwall, through silanization processing, ensures that the gas of test does not react with copper pipe, and the gas of test is not residual in copper pipe, and copper pipe quality softness is durable in use.
Above-mentioned dynamic evenly mixing device has the fixed support for fixing dynamic evenly mixing device matching with dynamic evenly mixing device outward, the top of described support and bottom are cross, can be also other shapes, for example rice font, its object is, the position of stainless steel cylinder is firmly fixed.
Dynamically evenly mixing device proof pressure is greater than 100psi.
Temperature humidity control device also comprises temperature sensor, humidity sensor; Display screen and microprocessor; Temperature sensor and humidity sensor lay respectively at the inside of stove case, and temperature sensor, humidity sensor, well heater, humidifier, display screen and fan are connected with microprocessor respectively.The temperature and humidity of temperature humidity control device inside is reacted to microprocessor by temperature sensor and humidity sensor, displays temperature and humidity on display screen simultaneously, can be regulated and controled the gas temperature of its inside and humidity by this temperature humidity control device of microprocessor, by well heater or humidifier or fan operation, to adjust the temperature and humidity of the gas in temperature humidity control device.
Microprocessor is also connected with flowmeter, to control the flow of every pipeline;
Also be parallel with pressure relief valve by pipeline with the other end of flow dynamics evenly mixing device.
Sampling adsorbent equipment can be adsorption tube or absorption bottle, and there are solid absorbent or liquid absorption liquid in sampling adsorbent equipment inside.
Fundamental purpose of the present utility model be the gas of judgement test in the situation that having multiple for example five kinds of simulation interference gas, adsorbent now collecting efficiency.Five kinds of simulation interference gas can be selected arbitrarily wherein 1-5 kinds, and concentration range also can regulate arbitrarily.Many components flow gas distributing system gas out has an overall control valve, to control the general pressure of the calibrating gas obtaining, and the excessive too small effect that all can cause calibration test system test.
The beneficial effects of the utility model are:
(1) adopted above-mentioned volatile organic matter in air sampling efficiency proving installation, it is simple in structure, adopts without air pump;
(2) adopted temperature humidity control device, the temperature and humidity of gas is controlled in some scopes or under a certain specific temperature or humidity, the temperature and humidity conditions of the actual samples environment while simulating various spot sampling, finds the humiture environment of best sampling with optimal adsorption material.Make to detect the result of analyzing more accurate.
(3) sample effect of the gas that can detect multiple sample mode applied widely, as sampling pipe or the adsorption tube of different types of sorbing material are housed, sorbing material can be solid adsorbent or liquid absorption liquid;
(4) can calculate accurately the adsorption of adsorbent;
(5) can be used for the optimal adsorption material of system of selection.
(6) can be used for configuring the calibrating gas of variable concentrations.
(7) can be used for simulating under the interference gas condition of variable concentrations, the adsorption of sorbing material.
(8) can be used for determining the Best (the temperature and humidity scope of atmospheric sampling) of optimal adsorption material.
(9) can be used for determining the capacity that penetrates of optimal adsorption material.
Brief description of the drawings
Fig. 1 is volatile organic matter in air sampling efficiency proving installation structural representation of the present utility model;
Fig. 2 is the lateral plan of temperature humidity control device of the present utility model;
Fig. 3 is electrical schematic diagram of the present utility model;
Fig. 4 be of the present utility model in the dynamic structural representation of evenly mixing device and support;
Fig. 5 is seven kinds of benzene homologues chromatograms;
In figure, 1-steel cylinder I, 2-steel cylinder II, 3-humidifier, 4-temperature humidity control device, 5-well heater, the dynamic evenly mixing device of 6-, 7-stirrer, the 8-adsorbent equipment of sampling, 9-temperature sensor, 10-humidity sensor, 11-fan, 12-microprocessor, 13-display screen, 14-pressure relief valve, 15-flowmeter, 16-support.
Embodiment
Implement example by reference to the accompanying drawings and specifically the utility model is further described, so that those skilled in the art understand the utility model.
Embodiment 1
Volatile organic matter in air is the most common, analyze maximum is benzene homologues, benzene homologues is generally benzene, toluene, ethylbenzene, P-xylene, m-xylene, o-xylene, isopropyl benzene, cinnamic general designation, it is the compound of seeing most in atmospheric environment and much pollution source gas, health is all had to certain damaging effect, wherein benzene was confirmed as strong carcinogen in 1993 by the World Health Organization (WHO), can leukemogenesis and alpastic anemia also generally acknowledged by medical circle.Therefore they are important pollutants of environment.Be now that thing is sampled testing efficiency as example taking benzene in air, adopt sampling efficiency proving installation of the present utility model to test.
Volatile organic matter in air sampling efficiency proving installation of the present utility model, comprises steel cylinder II 2, a temperature humidity control device 4 that stores 1, six the storage standards gas of steel cylinder I of diluents, dynamically 6, six sampling adsorbent equipments 8 of evenly mixing device;
Volatile organic matter in air sampling efficiency proving installation, this device comprises the steel cylinder I 1 that stores diluents, the steel cylinder II 2 of multiple storage standards gases, temperature humidity control device 4, dynamically evenly mixing device 6, multiple sampling adsorbent equipments 8;
Steel cylinder I 1, steel cylinder II 2 are in parallel with one end of temperature humidity control device 4 respectively; The other end of temperature humidity control device 4 is connected in series mutually with dynamic evenly mixing device 6, and dynamically the other end of evenly mixing device 6 is parallel with multiple sampling adsorbent equipments 8;
Between above-mentioned steel cylinder I 1, steel cylinder II 2, temperature humidity control device 4, dynamic evenly mixing device 6 and sampling adsorbent equipment 8, be all connected by pipeline;
Between steel cylinder I 1 and temperature humidity control device 4, between steel cylinder II 2 and temperature humidity control device 4, temperature humidity control device 4 and dynamically between evenly mixing device 6, dynamically evenly mixing device 6 all has flowmeter 15 between adsorbent equipment 8 with sampling;
Temperature humidity control device 4 comprises stove case, the bottom having heaters 5 of stove case, and humidifier 3 is arranged at the top of stove case, and the puff prot of described humidifier 3 is positioned at stove case inside, has fan 11 on the outer wall of stove case; Humidifier 3 adopts ultrasonic atomizing humidifier 3, and water vapour generation efficiency is high, and the time is short, by the amount that regulates the uninterrupted control water vapor of water to produce, between humidity range of control 0-95%;
The main body of above-mentioned dynamic evenly mixing device 6 is the stainless steel cylinder that stainless steel is made, and its inside, through electronics polishing grinding and deactivation processing, prevents from absorption and be easy to cleaning, and prevents from addition seeing that the labile gas of light decomposes;
Dynamically there is stirrer 7 evenly mixing device 6 inside, and the gas that enters dynamic evenly mixing device 6 is mixed again by stirrer 7 therein, ensure that the gas that dynamically mixes system reaches the requirement needing.
Above-mentioned pipeline is copper pipe, and copper pipe is high-purity copper material, and inwall, through silanization processing, ensures that the gas of test does not react with copper pipe, and the gas of test is not residual in copper pipe, and copper pipe quality softness is durable in use.
Outside above-mentioned dynamic evenly mixing device 6, there is the fixed support 16 for fixing dynamic evenly mixing device 6 matching with dynamic evenly mixing device 6, top and the bottom of described support 16 are cross, also can be other shape, for example rice font, its object is, the position of stainless steel cylinder is firmly fixed.
Dynamically evenly mixing device 6 proof pressures are greater than 100psi.
Temperature humidity control device 4 also comprises temperature sensor 9, humidity sensor 10; Display screen 13 and microprocessor 12; Temperature sensor 9 and humidity sensor 10 lay respectively at the inside of stove case, and temperature sensor 9, humidity sensor 10, well heater 5, humidifier 3, display screen 13 and fan 11 are connected with microprocessor 12 respectively.The temperature and humidity of temperature humidity control device 4 inside is reacted to microprocessor 12 by temperature sensor 9 and humidity sensor 10, displays temperature and humidity on display screen 13 simultaneously, can be regulated and controled the gas temperature of its inside and humidity by microprocessor 12 these temperature humidity control device 4, move by well heater 5 or humidifier 3 or fan 11, to adjust the temperature and humidity of the gas in temperature humidity control device 4.
Also be parallel with pressure relief valve 14 by pipeline with the other end of flow dynamics evenly mixing device 6.
In the process of collection benzene homologues, comprise following step:
The standard benzene homologues gas that preparation concentration is 50.0mg/m3, the concentration of gas is used for calculating the absolute content of adsorbent adsorb organic compound, the pressure of the diluents in steel cylinder I 1 is greater than 5 MPas, be controlled between 5-15 MPa, open dividing potential drop table to 0.2-1.0 MPa, the pressure of the calibrating gas in steel cylinder II 2 is greater than 5 MPas, be controlled between 5-15 MPa, actual flow regulates with mass flowmeter 15 according to the capacity that penetrates of sorbing material, make calibrating gas flow into the stove case bottom of temperature humidity control device 4, temperature and humidity in regulating stove case, temperature is adjusted to 25 DEG C of left and right, humidity is 10%, the gas obtaining is in the outlet outflow of stove box top, gas enters dynamic evenly mixing device 6 and mixes, gas after mixing enters sampling adsorbent equipment 8, through the charcoal absorption in adsorbent equipment, export again.
The range of the flowmeter 15 before sampling adsorbent equipment 8 is flow range 10-1000ml/min of spot sampling air sampler at ordinary times, the flow of design discharge meter 15 is 500mL/min, gather 60 minutes, calibrating gas flows through the adsorbent equipment that activated charcoal is housed with the speed of 500mL/min, calculate gas production volume by sampling time and sampling flow velocity, by gas Chromatographic Determination, external standard method is quantitatively calculated theoretical benzene homologues absolute magnitude that the concentration of benzene homologues absolute magnitude that actual adsorbent collects and calibrating gas calculates and relatively judges the size of sampling efficiency.Because the gas in steel cylinder I 1, II is pressure gas, can ensure enough gas volumes and test, and in steel cylinder I 1, II, the gaseous tension in 1 is also the power resources of gas, can ensure the amount of gas, can not form negative pressure.
Embodiment 2
Be with the difference of embodiment 1, in embodiment 2, the flow of design discharge meter 15 is 3000mL/min, gathers 10 minutes.
Be with the difference of embodiment 1, in embodiment 3, the flow of design discharge meter 15 is 500mL/min, gathers 200 minutes.
Be with the difference of embodiment 1, in embodiment 4, temperature is room temperature, and humidity is 80%, and flow and the acquisition time of design discharge meter 15 are constant.
Measure material: benzene, toluene, ethylbenzene, P-xylene, m-xylene, o-xylene, styrene.
GC conditions:
Chromatographic column: AT-WAX 30m*320 μ m*0.5 μ m injector temperature: 180 DEG C of detecting devices (FID) temperature: 300 DEG C of column temperatures: 65 DEG C of post flow: 2.0ml/min;
Typical curve and instrument detection limit
Compound concentration is followed successively by the benzene homologues class standard of physical solution (this is reference concentration sequence) of 2.0mg/L, 5.0mg/L, 10.0mg/L, 20.0mg/L, 50 mg/L and 100 mg/L.
In this concentration range, the related coefficient of 8 kinds of components is all greater than 0.999.Taking signal to noise ratio (S/N ratio) as calculating the instrument detection limit of each material, acquired results sees the following form.
The linear equation of 7 kinds of benzene homologues class materials
The concentration of four kinds of embodiment Plays gases is all 50.0mg/m3, and the testing time in each embodiment is 6 times, collects after calibrating gas is used standard method of analysis the solvent analysis and use gas chromatographic analysis in each embodiment, and the data that obtain are as follows:
Embodiment 1
Embodiment 2
Data result shows:
Six image data relative standard deviations of seven kinds of benzene homologues of embodiment 1 are 1.13%-3.07%, six image data relative standard deviations of seven kinds of benzene homologues of implementing example 2 are 1.96%-5.46%, six image data relative standard deviations of seven kinds of benzene homologues of implementing example 3 are 1.80%-3.52%, all meet or be better than other device.
Embodiment 1 and embodiment 2 compare, the gas volume gathering be all 30L, and the benzene homologues absolute magnitude that two kinds of methods collect is in theory the same, but reaches 3L/min because of the gas flow rate of embodiment 2, adsorbent can not be effectively very fast absorption, so embodiment 2 is poorer than embodiment 1 adsorption efficiency.Two kinds of embodiment show that this device can test the optimal adsorption speed of adsorbent.
Embodiment 1 and embodiment 3 compare, the gas volume that embodiment 1 gathers is 30L, the gas volume that embodiment 3 gathers is 100L, the benzene homologues absolute magnitude example 3 that two kinds of methods collect is in theory 3.3 times of example 1, but actual acquisition to benzene homologues absolute magnitude example 3 are 2 times of left and right of example 1, this situation shows that embodiment 3 adsorbents have reached state of saturation in the time collecting certain benzene homologues, now adsorbent has not had adsorption, and two kinds of embodiment show that this device can test the optimal adsorption amount of adsorbent.
Embodiment 1 and embodiment 4 compare, room temperature is consistent, the gas volume gathering is 30L, gas production adsorbent unsaturation, gas production speed is consistent, but six image data relative standard deviations of seven kinds of benzene homologues of implementing example 4 are 11.63%-27.84%, and deviation is larger, this is because affect the humidity of an important indicator gas of adsorbent adsorption.When the adsorption of adsorbent in the larger situation of the humidity of gas obviously declines.
Two kinds of embodiment show that device of the present utility model can test the optimal adsorption condition of adsorbent.
Certain volatile organic matter in air sampling efficiency proving installation of the present utility model is not merely applicable to above cited airborne benzene homologues, is also applicable to other volatile organic matter.
Claims (9)
1. volatile organic matter in air sampling efficiency proving installation, is characterized in that, described device comprises the steel cylinder I that stores diluents, the steel cylinder II of multiple storage standards gases, temperature humidity control device, dynamically evenly mixing device, multiple sampling adsorbent equipments;
Described steel cylinder I, steel cylinder II are in parallel with one end of temperature humidity control device respectively; The other end of described temperature humidity control device is connected in series mutually with dynamic evenly mixing device, and dynamically the other end of evenly mixing device is parallel with multiple sampling adsorbent equipments;
Between above-mentioned steel cylinder I, steel cylinder II, temperature humidity control device, dynamic evenly mixing device and sampling adsorbent equipment, be all connected by pipeline;
Between steel cylinder I and temperature humidity control device, between steel cylinder II and temperature humidity control device, temperature humidity control device and dynamically between evenly mixing device, dynamically evenly mixing device all has flowmeter between adsorbent equipment with sampling;
Described temperature humidity control device comprises stove case, the bottom having heaters of described stove case, and humidifier is arranged at the top of stove case, and the puff prot of humidifier is positioned at stove case inside, on the outer wall of stove case, has fan.
2. a kind of volatile organic matter in air sampling efficiency proving installation as claimed in claim 1, is characterized in that, the main body of described dynamic evenly mixing device is stainless steel cylinder.
3. a kind of volatile organic matter in air sampling efficiency proving installation as claimed in claim 1 or 2, is characterized in that, there is stirrer described dynamic evenly mixing device inside.
4. a kind of volatile organic matter in air sampling efficiency proving installation as claimed in claim 1, is characterized in that, described pipeline is copper pipe.
5. a kind of volatile organic matter in air sampling efficiency proving installation as claimed in claim 1, it is characterized in that, described dynamic evenly mixing device have outward match with dynamic evenly mixing device and for the fixed support of fixing dynamic evenly mixing device, the top of described support and bottom are cross.
6. a kind of volatile organic matter in air sampling efficiency proving installation as claimed in claim 1, is characterized in that, described dynamic evenly mixing device proof pressure is greater than 100psi.
7. a kind of volatile organic matter in air sampling efficiency proving installation as claimed in claim 1, is characterized in that, described temperature humidity control device also comprises temperature sensor, humidity sensor; Display screen and microprocessor; Described temperature sensor and humidity sensor lay respectively at the inside of stove case, and described temperature sensor, humidity sensor, well heater, humidifier, display screen and fan are connected with microprocessor respectively; Described microprocessor is also connected with flowmeter.
8. a kind of volatile organic matter in air sampling efficiency proving installation as claimed in claim 1, is characterized in that, the other end of flow dynamics evenly mixing device is also parallel with pressure relief valve by pipeline.
9. a kind of volatile organic matter in air sampling efficiency proving installation as claimed in claim 1, is characterized in that having adsorbent or adsorption liquid in described sampling adsorbent equipment.
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| CN201320758656.0U CN203643409U (en) | 2013-11-27 | 2013-11-27 | Tester for testing sampling efficiency of volatile organic compound in air |
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| CN201320758656.0U CN203643409U (en) | 2013-11-27 | 2013-11-27 | Tester for testing sampling efficiency of volatile organic compound in air |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675125A (en) * | 2013-11-27 | 2014-03-26 | 江苏省环境监测协会 | Test device for sampling efficiency of volatile organic compounds in air |
| CN106840768A (en) * | 2017-01-19 | 2017-06-13 | 中国科学院南京土壤研究所 | A kind of organic pollution in-situ solidifying harvester and its application |
| CN107247118A (en) * | 2017-06-29 | 2017-10-13 | 国家电网公司 | A kind of adsorbent water adsorption rate determination device and method |
| CN111272499A (en) * | 2020-03-06 | 2020-06-12 | 吕梁学院 | Environment measuring sampling device |
-
2013
- 2013-11-27 CN CN201320758656.0U patent/CN203643409U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675125A (en) * | 2013-11-27 | 2014-03-26 | 江苏省环境监测协会 | Test device for sampling efficiency of volatile organic compounds in air |
| CN103675125B (en) * | 2013-11-27 | 2015-04-15 | 江苏省环境监测中心 | Test device for sampling efficiency of volatile organic compounds in air |
| CN106840768A (en) * | 2017-01-19 | 2017-06-13 | 中国科学院南京土壤研究所 | A kind of organic pollution in-situ solidifying harvester and its application |
| CN106840768B (en) * | 2017-01-19 | 2024-01-30 | 中国科学院南京土壤研究所 | Organic pollutant in-situ curing and collecting device and application thereof |
| CN107247118A (en) * | 2017-06-29 | 2017-10-13 | 国家电网公司 | A kind of adsorbent water adsorption rate determination device and method |
| CN111272499A (en) * | 2020-03-06 | 2020-06-12 | 吕梁学院 | Environment measuring sampling device |
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