CN101676708B - Portable NOx sampling device - Google Patents
Portable NOx sampling device Download PDFInfo
- Publication number
- CN101676708B CN101676708B CN2008102226295A CN200810222629A CN101676708B CN 101676708 B CN101676708 B CN 101676708B CN 2008102226295 A CN2008102226295 A CN 2008102226295A CN 200810222629 A CN200810222629 A CN 200810222629A CN 101676708 B CN101676708 B CN 101676708B
- Authority
- CN
- China
- Prior art keywords
- gas
- sampling
- circuit
- gas flow
- flow rate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a portable NOx sampling device, comprising a gas control valve (2), a pressure gage (4) and a sampling gas circuit which are connected in the gas circuit in series; the sampling gas circuit comprises a gas flow rate regulating valve (8) which is connected with the pressure gage (4); the other end of the gas flow rate regulating valve (8) is connected with a three-way switching valve (9); the other two ends of the three-way switching valve (9) are respectively connected with the sampling circuit and a gas flow rate regulating circuit; a sampling disc (12) and a switching valve (13) are connected in series in the sampling circuit; the switching valve (13) and the gas flow rate regulating circuit are then respectively connected with the two ends of a three-way joint (14); and the other end of the three-way joint is connected with a gas flowmeter (15) and a gas accumulated flowmeter (16). The device is suitable for collecting NO2 and NO in hydrocarbon gas and is used for analyzing the content of NO2 and NO.
Description
Technical field
The present invention is a kind of gas sampling assembly, specifically, is trace NO in a kind of beneficiation of hydrocarbons gas
2Sampling apparatus with NO.
Background technology
Ethene is important Organic Chemicals.The lightweight material oil ratio that is used to produce ethene at present is more in short supply, development heavy oil or the direct cracking ethylene preparation of residual oil or from the waste gas that is rich in alkene, to reclaim ethene be to slow down lightweight material effective way in short supply.But, all contain non-hydrocarbon impurities in the alkene resource that these two kinds of technologies produce, confirmed already, they are being carried out processing and utilization, especially carry out in the alkene separation processes NO that contains in the gas at cryogenic system
x(NO
2+ NO) possibly there is potential safety hazard.Therefore, detect NO in the refinery gas
xContent whether can extremely important meaning be arranged safe utilization to it.
NO in the hydrocarbon gas
xLower (the nLL of content
-1Level), can be used for NO in the gas at present
xThe instrument of analyzing is to NO
xDetected concentration at 50nLL
-1, need be to NO in the gas
xCould measure after the enrichment.To key component in the refinery gas is gaseous hydrocarbon, also has the situation of other impurity simultaneously, has developed a kind of suitable enrichment and has measured trace NO in the hydrocarbon gas
xThe analytical approach of solid absorption tube enrichment-ion chromatography.But because on-the-spot commercial plant sample point gas outlet pressure is very high, the gas sampling change in flow is very big, and above-mentioned analytical approach requires the enrichment sampling flow velocity of gaseous sample could guarantee the accuracy of data within the specific limits.Therefore, develop a kind of portable NO
xThe spot sampling device becomes trace NO in the accurate mensuration gaseous sample
xThe prerequisite of content.
Summary of the invention
The purpose of this invention is to provide a kind of portable NO
xSampling apparatus, this device be the NO in the beneficiation of hydrocarbons gas at the scene
x, to be used to analyze NO wherein
xContent.
Portable NO of the present invention
xSampling apparatus; Comprise the gas control valve, tensimeter and the sampling gas circuit that are connected in the gas circuit; Described sampling gas circuit comprises the gas flow rate variable valve (8) that links to each other with tensimeter (4); The other end of gas flow rate variable valve (8) is connected with three-way switch valve (9), and the other two ends of three-way switch valve are regulated circuit with sampling circuit and gas flow rate respectively and linked to each other, and are connected with sampler tray and switch valve in the sampling circuit; Switch valve is regulated circuit with gas flow rate and is linked to each other with the two ends of a three-way connection respectively, the other end polyphone gas meter and the gas flow quantity recorder of three-way connection.
Portable NO provided by the invention
xSampling apparatus is divided into two-way with the gas circuit of collected specimens, and one the tunnel is used for the adjustments of gas flow velocity, and another road is used for gathering the NO of gas
xDuring the collection in worksite gaseous sample, can control and regulate gas outlet pressure and flow easily, thereby guarantee the NO in the gas on-site
xThe effect of enrichment sampling.
Description of drawings
Fig. 1 is the structural representation of sampling apparatus of the present invention.
Fig. 2 is the structural representation of sampler tray in the sampling apparatus of the present invention.
Embodiment
Portable NO of the present invention
xSampling apparatus; On-the-spot gas circuit with after apparatus of the present invention are connected, is regulated the flow velocity of collected gas through gas control valve, then gas piping is divided into two-way; One the tunnel is used for regulating and the stabilizing gas flow velocity, and one the tunnel is used under the stable situation of gas flow rate, gathering the also NO of enriched gas
2And NO, be used for analyzing the NO of tested gas
2With NO content.Sampling apparatus of the present invention can record the instantaneous delivery of gas intuitively, through accumulating the accurate sampling volume that the formula gas meter can obtain gas, is convenient to accurately calculate NO in the gaseous sample
2Concentration with NO.
Apparatus of the present invention are provided with gas control valve and tensimeter earlier in the upstream line of gas collecting, so that to regulating from the pressure and the flow velocity of field pipes line effluent air, make gas get into the sampling gas circuit to wherein the NO that carries out then
2Carry out enrichment with NO.Described sampling gas circuit comprises gas flow rate variable valve and two mutual and connect pipelines, and one the tunnel is that gas flow rate is regulated circuit, and another road is NO
2With the NO sampling circuit; Be provided with sampler tray and switch valve in the sampling circuit, two circuits synthesize one the tunnel by three-way connection, also can switch valve and three-way connection be replaced with a three-way switch valve; Two circuits are synthesized one the tunnel, contact again gas meter and gas flow quantity recorder.
For gathering a plurality of samples simultaneously; The sampling gas circuit that is provided with in apparatus of the present invention can have a plurality of; Preferred 2～4; The parallel connection of each sampling gas circuit all is connected with gas flow rate variable valve, the parallel sampling circuit that connects and gas flow rate and regulates circuit, gas meter and gas flow quantity recorder in each sampling gas circuit.
The described sampler tray of apparatus of the present invention comprises dehydration bottle, the NO of polyphone successively
2Absorption tube, NO oxidation tube and second NO
2Absorption tube.
Described NO
2NO is housed in the absorption tube
2Absorbing agent, described absorbing agent comprise the alkali compounds of 10～40 quality % and the zeyssatite of 60～90 quality %.Described alkali compounds preferred alcohol amine, diethanolamine, triethanolamine or NaOH, preferred 12～38 quality % of its content.Preferred red zeyssatite of described zeyssatite or white diatomite, preferred 62～88 quality % of its content.Preferred 250～380 microns of diatomaceous grain size, preferred 1.0～10.0 meters of specific surface area
2/ gram.
The preparation method of absorbing agent of the present invention comprises and uses the alkali compounds WS to be the maceration extract impregnated carrier, and dipping temperature is 20～40 ℃, and preferred 5～40 quality % of the concentration of used maceration extract promptly get absorbing agent with solid drying behind the dipping.
NO of the present invention
2The preferred straight tube of absorption tube also can be U type pipe.Preferred 2～6 millimeters of the internal diameter of described absorption tube, more preferably 3～5 millimeters.The material preferred glass of absorption tube.Absorbing agent quality optimization 0.3～2.0 gram of filling in the absorption tube, more preferably 0.5～1.5 gram.
NO oxidation tube of the present invention comprises the inorganics of reaction tube and the NO free radical shown in the surface-coated formula (I) that is filled in the pipe,
In the formula (I), R is selected from C
1～C
6Alkyl, be with substituent C
6～C
8Alkaryl, pyridine radicals, thienyl, thiazole or 1,2,4-triazole, said C
6～C
8The substituting group of alkaryl be alkoxy, halogen atom, nitro ,-NR '
2Or-(CH
2) NR '
2, wherein R ' is selected from C
1～C
3Alkyl.Described C
6～C
8Alkaryl also comprises phenyl, said C
6～C
8Alkaryl is said is with substituent C
6～C
8The preferred p-methylphenyl of alkaryl, o-methyl-phenyl-, p-methoxyphenyl, rubigan, Chloro-O-Phenyl, a chlorphenyl, to bromophenyl, o-bromophenyl, a bromophenyl, p-nitrophenyl, ortho-nitrophenyl base, m-nitro base or to N, the N-3,5-dimethylphenyl.
The preferred silica sand of described inorganics, the mass ratio of NO free radical and inorganics are 1:100～8000.Described NO oxidation tube can be U type or straight pipe type, the material preferred glass of oxidation tube.The concrete preparation method of NO oxidation tube can be referring to CN101081999A.
Specify the present invention below in conjunction with accompanying drawing.
Among Fig. 1; Get into sampling apparatus of the present invention by pipeline 1 after the gas vent valve of hydrocarbon gas in commercial plant that carries out on-the site analysis reduces pressure, carry out the pressure fine setting, after gas gets into three-way connection 3 through gas control valve 2; By the tensimeter that is attached thereto 4 indication inlet pressures; And then be divided into two parallel sampling gas circuits by three-way connection 5, wherein a road through pipeline 6 and gas flow rate variable valve, be preferably needle valve 8 in succession, another road is through pipeline 7 and another needle valve 8 ' be connected; Form two parallel sampling gas circuits that link is identical, can gather two parallel samples at the scene.In a sampling gas circuit; Gas is divided into two parallel pipelines by three-way switch valve 9 with gas circuit then earlier through a needle valve 8, and one the tunnel is the sampling circuit of solid line mark; Polyphone sampler tray 12 and switch valve 13 in pipeline; Another road is that 11, two circuits of gas flow rate adjusting circuit of dotted line mark are combined into a pipeline by three-way connection 14, contact gas meter 15 and gas flow totalizer 16 again.The connected mode of another sampling gas circuit and above-mentioned sampling gas circuit is identical.
Fig. 2 is the structural representation of sampler tray according to the invention, pipeline 10 that links to each other with three-way switch valve 9 in the sampling gas circuit and dehydration bottle 17 polyphones, and NO again contacts
2Absorption tube 18, NO oxidation tube 19 and second NO
2Absorption tube 20 is accomplished the connection of each parts in the sampler tray, NO
2The outlet of absorption tube 20 then with switch valve 13 shown in Figure 1 in succession.
Above-mentioned sampling circuit and gas flow control valve etc. all can be contained in the box, form portable sampling apparatus, and gas meter 15 is looked its big I with gas flow totalizer 16 and is placed in the box, also can place outside the box.
The portable NO of the present invention
xThe method of application of sampling apparatus is divided into two stages, and division is following:
Regulate sampling flow velocity and stabilization sub stage: off switch valve 13, swivel tee transfer valve 9 breaks off itself and pipeline 10 in the sampling gas circuit, regulates circuit 11 with gas flow rate and connects.The gas access pipeline 1 of sampling apparatus of the present invention is connected with on-the-spot commercial plant gas sampling point pipeline exit.Open on-the-spot commercial plant gas vent valve and gas control valve 2, pressure shown in the tensimeter 4 is adjusted to 0.1MPa, it is 250～400ml/min that adjusting needle valve 8 makes the reading of flowmeter 15, and 10～20min is stablized in ventilation.
Sample phase: with dehydration bottle 17, the NO of sampler tray shown in Figure 2 12
2Absorption tube 18, NO oxidation tube 19 and second absorption tube, 20 usefulness teflon hoses are connected successively, the initial reading of record gas buildup flowmeter 16.Open switch valve 13, swivel tee transfer valve 9 is regulated path 11 with gas flow rate and is broken off, and makes gas flow into the pipeline 10 in the sampling gas circuit, the beginning sample collecting.The hydrocarbon gas of being gathered is introduced into the dehydration bottle in the sampler tray 12, removes the micro-moisture that contains in the gas, gets into NO then
2Absorption tube 18, NO wherein
2Be absorbed, the NO in the hydrocarbon gas does not react with absorbing agent, gets into NO oxidation tube 19 with hydrocarbon gas and is oxidized to NO
2, the hydrocarbon gas of discharging from NO oxidation tube 19 passes through second NO
2Absorption tube 20, NO wherein
2Be absorbed enrichment, other gas flows out, and through switch valve 13, gets into gas meter 15 and gas flow totalizer 16, the flow velocity and the integrated flow of record gas.After treating the sample collecting certain hour, close the gas vent valve of gas control valve 2 and on-the-spot commercial plant, the final reading of record gas buildup flowmeter.
After sampling finishes, with NaOH solution respectively with adsorbed components desorb in two absorption tubes, with ion chromatography NO from the stripping liquid of each solid absorption tube collection
2 -And NO
3 -Concentration, can calculate and generate NO
2 -And NO
3 -Required NO
2Amount, be NO
2Measured quantity.With the known NO of absorbing agent enrichment
2NO in the analog gas of content
2, NO in the tested analog gas
2Measured quantity and the ratio of its well-known theory amount be that absorbing agent is to NO
2Absorption efficiency, repeatedly repeated experiments can be absorbed agent to NO
2Average absorption efficient according to absorbing agent to NO
2Average absorption efficient and this gas in NO
2Measured quantity can be tried to achieve the NO of tested gas
2Theoretical amount, by the cumulative volume of the determined gas through absorption tube, i.e. the gas flow number of gas buildup flowmeter record is confirmed the NO in the tested gas again
2Concentration.
By first NO
2NO in the stripping liquid of absorption tube
2 -And NO
3 -Concentration, can record NO in the hydrocarbon gas
2Concentration, by second NO
2NO in the stripping liquid of absorption tube
2 -And NO
3 -Concentration, can record the concentration of NO in the gas through converting.
Portable sampling device provided by the invention is applicable to trace NO in petroleum refining, the petrochemical complex industrial installation gaseous sample
xEnrichment and collection so that the NO in the assay determination gas
2With NO concentration.
Claims (6)
1. portable NO
xSampling apparatus; Comprise the gas control valve (2), tensimeter (4) and the sampling gas circuit that are connected in the gas circuit; Described sampling gas circuit comprises the gas flow rate variable valve (8) that links to each other with tensimeter (4); The other end of gas flow rate variable valve (8) is connected with three-way switch valve (9); The other two ends of three-way switch valve (9) are regulated circuit with sampling circuit and gas flow rate respectively and are linked to each other, and are connected with sampler tray (12) and switch valve (13) in the sampling circuit, and switch valve (13) is regulated circuit with gas flow rate and linked to each other with the two ends of a three-way connection (14) respectively; The other end polyphone gas meter (15) and the gas flow quantity recorder (16) of three-way connection, described sampler tray comprises dehydration bottle (17), the NO of polyphone successively
2Absorption tube (18), NO oxidation tube (19) and second NO
2Absorption tube (20).
2. according to the described sampling apparatus of claim 1; It is characterized in that described sampling gas circuit has a plurality of; Each sampling gas circuit all is connected with gas flow rate variable valve (8), makes it parallel sampling circuit that is connected and gas flow rate adjusting circuit by three-way switch valve (9) and three-way connection (14), and the gas meter (15) and the gas flow quantity recorder (16) of contacting with three-way connection (14).
3. according to the described sampling apparatus of claim 1, it is characterized in that described NO
2NO is housed in the absorption tube
2Absorbing agent, described absorbing agent comprise the alkali compounds of 10～40 quality % and the zeyssatite of 60～90 quality %.
4. according to the described sampling apparatus of claim 3, it is characterized in that described alkali compounds is monoethanolamine, diethanolamine, triethanolamine or NaOH.
5. according to the described sampling apparatus of claim 3, it is characterized in that described zeyssatite is red zeyssatite or white diatomite.
6. according to claim 3 or 5 described sampling apparatuses, it is characterized in that described diatomaceous grain size is 250～380 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102226295A CN101676708B (en) | 2008-09-19 | 2008-09-19 | Portable NOx sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102226295A CN101676708B (en) | 2008-09-19 | 2008-09-19 | Portable NOx sampling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101676708A CN101676708A (en) | 2010-03-24 |
| CN101676708B true CN101676708B (en) | 2012-02-15 |
Family
ID=42029347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102226295A Active CN101676708B (en) | 2008-09-19 | 2008-09-19 | Portable NOx sampling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101676708B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102236002B (en) * | 2010-04-28 | 2013-04-03 | 中国科学院大气物理研究所 | Measuring system and method of N2O concentration in air |
| CN103048168B (en) * | 2011-10-17 | 2015-02-18 | 中国石油化工股份有限公司 | Device and method for collecting cracking gas in kettle-type coking process |
| CN103776910B (en) * | 2012-10-23 | 2015-06-17 | 中国石油化工股份有限公司 | Analysis system for nitrogen oxides in exhaust gas |
| CN103808533A (en) * | 2012-11-12 | 2014-05-21 | 洛阳凯美胜石化设备有限公司 | Gas sampling device |
| CN103900859B (en) * | 2012-12-26 | 2016-03-16 | 上海巴斯夫聚氨酯有限公司 | A kind of isocyanates produce in the sampler of toxic gas and method |
| CN103149057B (en) * | 2013-03-04 | 2015-01-21 | 中国石油天然气股份有限公司 | Natural gas sample collecting method for detecting content of mercury in natural gas |
| CN105716913A (en) * | 2016-04-01 | 2016-06-29 | 枣庄矿业(集团)付村煤业有限公司 | Device for quickly sampling gas in disaster area |
| CN106596197A (en) * | 2016-12-18 | 2017-04-26 | 武汉洪兴伟业环境科技有限公司 | Combined sampling system for pollution source waste gas |
| CN108248900A (en) * | 2017-12-28 | 2018-07-06 | 安徽华东光电技术研究所 | For the system of big flow plasma thrusters simulation vacuum |
| CN113281311B (en) * | 2020-02-20 | 2021-11-19 | 北京大学 | Online detection device and method for organic peroxy radicals in atmosphere |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2415358Y (en) * | 2000-02-04 | 2001-01-17 | 山东省纺织科学研究院 | Automatic oxygen index measurer |
| CN2489323Y (en) * | 2001-07-29 | 2002-05-01 | 修光伟 | Sampler for smoke dust |
| CN1948959A (en) * | 2006-09-27 | 2007-04-18 | 朱先德 | Constant sulphur appliance with airflow balancing device |
| CN101169453A (en) * | 2007-10-12 | 2008-04-30 | 中国计量科学研究院 | Multipath gas automatic sampling device |
| CN101256130A (en) * | 2008-03-13 | 2008-09-03 | 丁志江 | Method and apparatus for measuring water content of high-precision coal gas machinery |
-
2008
- 2008-09-19 CN CN2008102226295A patent/CN101676708B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2415358Y (en) * | 2000-02-04 | 2001-01-17 | 山东省纺织科学研究院 | Automatic oxygen index measurer |
| CN2489323Y (en) * | 2001-07-29 | 2002-05-01 | 修光伟 | Sampler for smoke dust |
| CN1948959A (en) * | 2006-09-27 | 2007-04-18 | 朱先德 | Constant sulphur appliance with airflow balancing device |
| CN101169453A (en) * | 2007-10-12 | 2008-04-30 | 中国计量科学研究院 | Multipath gas automatic sampling device |
| CN101256130A (en) * | 2008-03-13 | 2008-09-03 | 丁志江 | Method and apparatus for measuring water content of high-precision coal gas machinery |
Non-Patent Citations (5)
| Title |
|---|
| M化工矿物与加工》.2007,(第11期),21-24. * |
| 冀宏.去除氮氧化物的复合吸附剂的研究.《北京工业大学硕士学位论文》.2007,(第6期),全文. * |
| 王艳磊等.新型复合吸附剂对NOX吸附性能的研究.《IP& * |
| 王艳磊等.新型复合吸附剂对NOX吸附性能的研究.《IP&M化工矿物与加工》.2007,(第11期),21-24. |
| 罗曦芸等.固体主动采样法用于检测博物馆内二氧化氮.《文物保护与考古科学》.2004,第16卷(第4期),第12页第3-5段. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101676708A (en) | 2010-03-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101676708B (en) | Portable NOx sampling device | |
| CN1926423B (en) | Method for sampling flue gas for analysis containing gas component having high susceptibility to adsorption | |
| CN202033333U (en) | Gas-phase adsorption-desorption device having function of automatically analyzing injected samples | |
| Abatzoglou et al. | The development of a draft protocol for the sampling and analysis of particulate and organic contaminants in the gas from small biomass gasifiers | |
| CN103076429A (en) | System for monitoring tail gas of moving source on line and sampling pollutants | |
| CN104777261A (en) | Low temperature gas chromatography system, low temperature gas chromatography method and low temperature gas chromatography device of volatile organic compound in atmosphere | |
| CN201298030Y (en) | Beam tube monitoring system for gases in coal mine | |
| CN102621173B (en) | Measurement method for oil-water ash content in gas | |
| CN101637693B (en) | NO2 absorbent, absorption tube and application thereof | |
| CN104215699A (en) | On-line degassing system for isotopc analysis of gaseous hydrocarbon acidolysis gas in rock | |
| CN207123396U (en) | A kind of test platform that evaluation organic waste gas treatment device performance is automatically controlled based on gas circuit | |
| CN212586315U (en) | Carbon isotope separation and enrichment device for hydrocarbon gas components in natural gas | |
| CN111537293A (en) | System and method for sampling and measuring HCl and/or HBr | |
| CN101353960A (en) | Exploration well oil test continuous metering apparatus | |
| CN214011151U (en) | Gas circuit system and non-methane total hydrocarbon on-line monitoring chromatograph | |
| CN115326967A (en) | Sample pretreatment system for on-line chromatographic analyzer for measuring natural gas components | |
| CN203053810U (en) | Device for measuring oil content, water content and ash content in gas under negative pressure state | |
| CN106483115A (en) | A kind of online Raman spectrometer pretreatment unit of gas and method | |
| CN201757748U (en) | Gas-oil ratio detecting device | |
| CN209784284U (en) | Sampling device for detecting components of coke oven flue gas | |
| CN113252866A (en) | Online detection system for total sulfur gas circuit | |
| CN113804807A (en) | Carbon isotope separation and enrichment device for hydrocarbon gas components in natural gas and sample preparation method | |
| RU139201U1 (en) | SYSTEM AND METHOD FOR SAMPLING FOR MEASURING MULTI-PHASE FLOW | |
| CN202903754U (en) | Inlet gas path automatic control structure of flame ionization detector of gas chromatograph | |
| CN106501401A (en) | A kind of device and method of quick measure water body ammonium nitrogen isotopics |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |