CN113484448A - Method for detecting content of methanol and ethanol in engine bleed air - Google Patents
Method for detecting content of methanol and ethanol in engine bleed air Download PDFInfo
- Publication number
- CN113484448A CN113484448A CN202110928299.7A CN202110928299A CN113484448A CN 113484448 A CN113484448 A CN 113484448A CN 202110928299 A CN202110928299 A CN 202110928299A CN 113484448 A CN113484448 A CN 113484448A
- Authority
- CN
- China
- Prior art keywords
- ethanol
- methanol
- bleed air
- content
- engine
- 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.)
- Pending
Links
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 141
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004458 analytical method Methods 0.000 claims abstract description 12
- 238000005070 sampling Methods 0.000 claims abstract description 8
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 230000014759 maintenance of location Effects 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 239000007789 gas Substances 0.000 claims description 19
- 238000012937 correction Methods 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 238000001514 detection method Methods 0.000 abstract description 16
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000000926 separation method Methods 0.000 abstract description 4
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000012946 outsourcing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
- G01N30/20—Injection using a sampling valve
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/50—Conditioning of the sorbent material or stationary liquid
- G01N30/52—Physical parameters
- G01N30/54—Temperature
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/62—Detectors specially adapted therefor
- G01N30/64—Electrical detectors
- G01N30/68—Flame ionisation detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/86—Signal analysis
- G01N30/8624—Detection of slopes or peaks; baseline correction
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a method for detecting the content of methanol and ethanol in bleed air of an engine, which comprises the following steps: collecting the bleed air in a sampling bag by adopting a 2.0-4.0L engine at the flow rate of 0.2-1L/min, discharging the bleed air after the bleed air is fully inflated, repeating the steps for 2-3 times, and sealing the sample inlet after the bleed air is fully filled for the last time; detecting the component content of the collected gas, wherein the injection port temperature is 160-; injecting sample gas through a sample injection valve of a chromatograph, determining the nature of retention time, and measuring the peak areas of the methanol and the ethanol to obtain the contents of the methanol and the ethanol. The method organically combines a gas taking mode, a separation technology and detection parameters to solve the analysis problem of methanol and ethanol in the bleed air of the engine.
Description
The technical field is as follows:
the invention belongs to the technical field of detection of bleed air content of engines, and particularly relates to a method for detecting the content of methanol and ethanol in bleed air of an engine.
Background art:
the engine bleed air is air which is introduced into a cockpit by a high-pressure compressor for a pilot to breathe, the content of impurities of the air directly influences the physical and mental health of the pilot, the measurement of the content of methanol and ethanol in the air bleed air of the compressor is difficult, and the analysis is more difficult if the content of the methanol is not more than 0.02 percent and the content of the ethanol is not more than 0.1 percent. At present, companies do not have the detection method and means of the item, and the detection method is established through subject research, so that the purpose of quantitatively detecting components in the bleed air is achieved, and the problem that related items in the bleed air of the engine cannot be detected is solved. .
At present, the detection method for methanol and ethanol in gas exists in China, but the content of the detection method is higher than that of engine bleed air, and the detection method is conventionally used for measuring (usually, activated carbon is used for adsorption, enrichment and concentration, and then carbon disulfide is used for desorption to form liquid for separation and detection), and the original detection method is complicated in analysis process, low in detection speed and not suitable for analysis of methanol and ethanol in engine bleed air.
The invention content is as follows:
the invention aims to overcome the defects in the prior art and provides a method for detecting the content of methanol and ethanol in bleed air of an engine. The method comprises the steps of collecting engine bleed air by selecting a proper air taking technology, completely separating trace methanol and ethanol in the bleed air from other components in the bleed air in a chromatographic column by selecting a reasonable separation technology, optimizing a hydrogen flame ionization detector to measure detection parameters of the methanol and the ethanol, and organically combining an air taking mode, the separation technology and the detection parameters to finally develop a rapid analysis method of the trace methanol and the ethanol in the engine bleed air so as to solve the analysis problem of the methanol and the ethanol in the engine bleed air.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for detecting the content of methanol and ethanol in bleed air of an engine comprises the following steps:
1) adopting a catheter to drain and an air sampler to bleed air by adopting a 2.0-4.0L engine at the flow speed of 0.2-1L/min and collect the air in a sampling bag, discharging the air after the air is fully inflated, repeating the steps for 2-3 times, and sealing a sample inlet after the air is fully inflated for the last time;
2) adjusting a gas chromatograph to carry out content detection on the collected gas, wherein the injection port temperature is 160-180 ℃, the detector temperature is 200-240 ℃, the column box temperature is 40-60 ℃, and the gas chromatograph is provided with a hydrogen flame ionization detector;
3) drawing a standard curve: after the standard gas passes through a chromatograph, obtaining a chromatographic peak and retention time of the standard gas, measuring chromatographic peak areas of methanol and ethanol, drawing a standard curve by taking the average value of peak areas as a vertical coordinate and the concentration as a horizontal coordinate, and solving a correction factor by using a single-point correction method;
4) sample analysis
Injecting sample gas through a sample injection valve of a chromatograph, determining the nature of retention time, and measuring the peak areas of the methanol and the ethanol, namely the content of the methanol and the ethanol.
In the step 1), the mass content of methanol and the mass content of ethanol in the bleed air of the engine are respectively less than or equal to 0.02% and less than or equal to 0.1%.
In the step 2), the accuracy of analyzing the content of the low-content methanol and ethanol in the bleed air is improved by determining a method for completely separating the methanol and the ethanol from the bleed air of the engine.
In the step 2), the precision of detecting methanol and ethanol in the bleed air of the engine is improved by optimizing the detection parameters of the hydrogen flame ionization detector for detecting methanol and ethanol.
The invention has the beneficial effects that:
the technology is applied to measurement of trace methanol and ethanol in engine bleed air, wherein the mass content of methanol is not more than 0.02%, and the mass content of ethanol is not more than 0.1%.
The technology solves the problem that no analysis method for methanol and ethanol in engine bleed air exists, the detection method for methanol and ethanol in engine bleed air is determined by optimizing sampling, separating and detecting technologies, independent detection of related items is achieved, and the technology can be applied to engines of other models and can also be popularized and applied to multiple aviation engine companies.
Analyzing the bleed air of ten engines every year, wherein the outsourcing cost of one engine is 2 ten thousand yuan, and the outsourcing cost is saved by 20 ten thousand yuan every year; the analysis method is popularized and applied to other aero-engines, and more than million yuan is created. The method realizes the autonomous analysis of methanol and ethanol in the bleed air of the engine, greatly shortens the long-term test run time of the engine, and saves the test run cost by millions of yuan. The achievement is applied to the measurement of the bleed air of a novel engine, can provide sufficient technical service for the development of the novel engine, and creates greater economic benefit. -
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to examples.
A method for detecting the content of methanol and ethanol in bleed air of an engine comprises the following steps:
1) and (6) sampling.
The guide pipe of the high-pressure compressor is used for guiding the flow, the air sampler takes 3.0L of air at the flow speed of 0.5L/min, and the engine bleed air is collected in the sampling bag and is discharged after being fully inflated. Repeating the operation for 2-3 times, sealing the sample inlet after the last collection, writing a label, and indicating the sampling place and time.
2) And (3) a reagent.
Mixing standard gas of methanol and ethanol: methanol: 0.00484 percent; ethanol: 0.00504% (aluminum alloy steel bottle), nitrogen gas is used as the base gas.
3) Device parameter setting
Gas chromatograph: providing a hydrogen flame ionization detector;
sample inlet temperature: 180 ℃ C:
detector temperature: 220 ℃;
temperature of the column box: 50 ℃;
and (3) quantitative ring: 1.0 mL;
sampling bag: 3.0L of plastic aluminum foil composite film;
a chromatographic column: a strongly polar capillary column 60m long and 0.32mm internal diameter.
4) Drawing a standard curve: and (4) passing the standard gas through a chromatograph to obtain chromatographic peaks and retention time of the standard gas. The chromatographic peak areas of methanol and ethanol were measured 3 times for each concentration. And drawing a standard curve by taking the average value of the peak areas as the ordinate and the concentration as the abscissa, and solving a correction factor by using a single-point correction method.
5) Sample analysis
Injecting 1.0mL of sample gas through a sample injection valve of a chromatograph, determining the retention time, and measuring the peak areas of methanol and ethanol. Each sample was analyzed 3 times and the mean was calculated.
6) Calculation of results
The calculation result is automatically given by the instrument.
Methanol and ethanol in bleed air of an engine are detected according to the method, wherein the methanol is 3.0ppm, and the ethanol is 2.0 ppm.
Claims (4)
1. A method for detecting the content of methanol and ethanol in bleed air of an engine is characterized by comprising the following steps:
1) adopting a catheter to drain and an air sampler, collecting bleed air in a sampling bag by adopting a 2.0-4.0L engine at a flow speed of 0.2-1L/min, discharging the bleed air after the bleed air is fully inflated, repeating the process for 2-3 times, and sealing a sample inlet after the bleed air is fully inflated for the last time;
2) adjusting a gas chromatograph to detect the component content of the collected gas, wherein the injection port temperature is 160-180 ℃, the detector temperature is 200-240 ℃, the column box temperature is 40-60 ℃, and the gas chromatograph is provided with a hydrogen flame ionization detector;
3) drawing a standard curve: after the standard gas passes through a chromatograph, obtaining a chromatographic peak and retention time of the standard gas, measuring chromatographic peak areas of methanol and ethanol, drawing a standard curve by taking the average value of peak areas as a vertical coordinate and the concentration as a horizontal coordinate, and solving a correction factor by using a single-point correction method;
4) sample analysis
Injecting sample gas through a sample injection valve of a chromatograph, determining the nature of retention time, and measuring the peak areas of the methanol and the ethanol, namely the content of the methanol and the ethanol.
2. The method for detecting the content of methanol and ethanol in the engine bleed air according to claim 1, wherein in the step 1), the content of methanol and the content of ethanol in the engine bleed air are less than or equal to 0.02% and less than or equal to 0.1%.
3. The method for detecting the content of methanol and ethanol in the engine bleed air according to claim 1, characterized in that in the step 1), a process for completely separating methanol and ethanol from the engine bleed air is adopted, so that the accuracy of analyzing the content of low-content methanol and ethanol in the bleed air is improved.
4. The method for detecting the content of methanol and ethanol in the engine bleed air according to claim 1, wherein in the step 2), the temperature of the sample inlet is 180 ℃, the temperature of the detector is 220 ℃, and the temperature of the column box is 50 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110928299.7A CN113484448A (en) | 2021-08-13 | 2021-08-13 | Method for detecting content of methanol and ethanol in engine bleed air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110928299.7A CN113484448A (en) | 2021-08-13 | 2021-08-13 | Method for detecting content of methanol and ethanol in engine bleed air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113484448A true CN113484448A (en) | 2021-10-08 |
Family
ID=77946447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110928299.7A Pending CN113484448A (en) | 2021-08-13 | 2021-08-13 | Method for detecting content of methanol and ethanol in engine bleed air |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113484448A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5435169A (en) * | 1993-06-14 | 1995-07-25 | New Jersey Institute Of Technology | Continuous monitoring of organic pollutants |
| CN104614477A (en) * | 2014-11-03 | 2015-05-13 | 沈阳石蜡化工有限公司 | Method for determining trace methanol content of 1-butylene |
| CN105319296A (en) * | 2015-05-27 | 2016-02-10 | 西安国联质量检测技术有限公司 | Measuring method for methyl alcohol content |
| CN107917975A (en) * | 2017-11-16 | 2018-04-17 | 健研检测集团有限公司 | The detection method of TVOC in a kind of environment |
| CN110146606A (en) * | 2019-05-06 | 2019-08-20 | 北京水木滨华科技有限公司 | A kind of preprocess method of highly pressurised liquid component |
| CN110286165A (en) * | 2019-05-06 | 2019-09-27 | 北京水木滨华科技有限公司 | A kind of qualitative and quantitative analysis method of highly pressurised liquid material |
-
2021
- 2021-08-13 CN CN202110928299.7A patent/CN113484448A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5435169A (en) * | 1993-06-14 | 1995-07-25 | New Jersey Institute Of Technology | Continuous monitoring of organic pollutants |
| CN104614477A (en) * | 2014-11-03 | 2015-05-13 | 沈阳石蜡化工有限公司 | Method for determining trace methanol content of 1-butylene |
| CN105319296A (en) * | 2015-05-27 | 2016-02-10 | 西安国联质量检测技术有限公司 | Measuring method for methyl alcohol content |
| CN107917975A (en) * | 2017-11-16 | 2018-04-17 | 健研检测集团有限公司 | The detection method of TVOC in a kind of environment |
| CN110146606A (en) * | 2019-05-06 | 2019-08-20 | 北京水木滨华科技有限公司 | A kind of preprocess method of highly pressurised liquid component |
| CN110286165A (en) * | 2019-05-06 | 2019-09-27 | 北京水木滨华科技有限公司 | A kind of qualitative and quantitative analysis method of highly pressurised liquid material |
Non-Patent Citations (8)
| Title |
|---|
| LENA ERNSTGÅRD 等: "Washout kinetics of ethanol from the airways following inhalation of ethanol vapors and use of mouthwash", 《CLINICAL TOXICOLOGY》, vol. 58, no. 3, 19 June 2019 (2019-06-19), pages 171 - 177 * |
| 朱观良: "气袋自动进样-气相色谱法测定气体中甲醇", 《中国环境科学学会学术年会论文集（2013）》, 1 August 2013 (2013-08-01), pages 2342 - 2345 * |
| 洪伟等: "乙醇/柴油发动机乙醇乙醛排放测试系统的设计与应用", 《吉林大学学报(工学版)》, vol. 36, no. 06, 10 November 2006 (2006-11-10), pages 885 - 888 * |
| 熊志立: "《分析化学》", 31 December 2019, pages: 347 - 350 * |
| 翁帮华: "气相色谱法测定环境中微量甲醇色谱柱的选择", 《石油与天然气化工》, vol. 30, no. 6, 31 December 2001 (2001-12-31), pages 313 - 315 * |
| 谷宇 等: "采用六通阀检测测量大气中甲醇和非甲烷总烃", 《中国环境管理干部学院学报》, vol. 24, no. 4, 31 August 2014 (2014-08-31), pages 74 - 76 * |
| 魏晓兵: "醇类汽车非常规排放物的检测技术研究", 《中国优秀博硕士学位论文全文数据库(硕士) 工程科技Ⅱ辑》, vol. 2006, no. 06, 15 June 2006 (2006-06-15), pages 035 - 13 * |
| 魏衍举等: "甲醇汽油发动机甲醛排放快速检测方法研究", 《内燃机学报》, vol. 26, no. 06, 25 November 2008 (2008-11-25), pages 533 - 537 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101923098B (en) | Continuous on-line analysis device of benzene, total hydrocarbons, methane and CO in carbon dioxide | |
| CN101887051B (en) | Online chromatographic analysis method | |
| CN105866302A (en) | Method for utilizing ultra-effective bonded phase chromatography to serially connect QDa while quickly detecting seven biogenic amines in white spirit | |
| CN111948327B (en) | Analysis method for trace oxygen, argon, nitrogen, carbon monoxide, methane and carbon dioxide in industrial hydrogen | |
| CN105136922A (en) | Adsorbent performance dynamic detection device | |
| CN101887052B (en) | Online chromatographic analysis device | |
| CN107884481A (en) | For determining the detecting system and detection method of weight rare gas content in natural gas | |
| CN102998408B (en) | Detection device for volatile organic matter in water and detection method | |
| CN106153431B (en) | A kind of detection method and its device of quick measurement raw gas ingredient | |
| CN111257473A (en) | Non-methane total hydrocarbon on-line detection device | |
| CN101839841A (en) | Adsorption/desorption experimental apparatus and method for gas in rock pore | |
| WO2022041796A1 (en) | Method for on-site identification of highly volatile chinese medicinal materials using surface acoustic wave/gas chromatography | |
| CN201637728U (en) | Device for rapidly detecting constituents of hydrogen | |
| CN102455328B (en) | Movable analysis system of reducing sulfides in atmosphere | |
| CN105954452A (en) | On-line detection apparatus of non-methane hydrocarbon and detection method thereof | |
| CN113484448A (en) | Method for detecting content of methanol and ethanol in engine bleed air | |
| CN116223708A (en) | Gas chromatography valve path system for analyzing nitrogen trifluoride gas content in carbon tetrafluoride and application method thereof | |
| CN201397320Y (en) | Experimental device for desorbing H2S and CO2 in alcohol amine solution | |
| CN2268257Y (en) | Quick-acting analysis instrument for smoke | |
| CN110658265A (en) | Method for simultaneously measuring contents of benzene, toluene, xylene and naphthalene in coal gas | |
| CN111983062B (en) | Method for detecting trace DMAEA in air | |
| CN110376324A (en) | Utilize the method and gas chromatograph of flame ionization ditector measurement oxygen concentration | |
| CN112180003B (en) | Method for identifying volatile Chinese medicinal materials in site by using surface acoustic wave gas chromatograph | |
| CN106290660A (en) | A kind of fast, the method for sulfurous gas in accurate quantitative analysis biogas | |
| CN102262131A (en) | Chromatographic process for analyzing content of benzene and toluene in vehicle gasoline with flow switching |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211008 |