CN101241063A - Cigarette flue gas aerosol grain size distribution detection method - Google Patents
Cigarette flue gas aerosol grain size distribution detection method Download PDFInfo
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Abstract
The invention discloses a detecting method of aerosol granularity distribution of cigarette smoke, comprising generating smoke sample by cigarette sample via smoke generating device: regulating air flow speed of smoke sample by adopting additional suction source regulating method to satisfy cigarette smoke request regulated and dilute concentration of smoke sample to reach effective detecting scale of aerosol detector; adjusting air flow speed of smoke sample entering aerosol detector for satisfy limited requirement of aerosol analyzer; processing step of aerosol granularity distribution detection and so on. The invention, through improving gas circuit connection design between the smoke sucker and aerosol detecting device, adopting waste discharging device adding assistant gas and additional suction source, designing proper air flow speed and so on, guarantees that cigarette combustion and smoking are accord with requirement when collecting smoke aerosol sample, which accomplishes detection of smoke aerosol sample by present aerosol detector.
Description
Technical field
The invention belongs to aerocolloidal detection technique field, be specifically related to a kind of method that detects the particulate distribution situation of variable grain size in the cigarette smoke, promptly a kind of detection method of cigarette flue gas aerosol size-grade distribution.
Background technology
In the prior art, the process that aerosoloscope is measured aerosol granularity distribution situation in the air is: by the suction source device of detecting device itself, stablizing flow velocity usually is 10L/min～40L/min, outwards the intake-gas sample; When sample concentration is higher, also can connects an axial diluter sample is diluted.
When adopting existing aerosoloscope to measure cigarette smoke,, cause detecting device seriously to transship because aerosol concentration is higher than airborne situation far away in the flue gas.Testing result occurs and exceed the instrument detecting upper limit (4.0 * 10
5FA), indifference between each detected value has all reached situations such as maximal value, can't carry out check and analysis.Even the diluted sample device that adopts aerosoloscope producer to provide for the high sample of tar content, does not still satisfy requirement, can't carry out check and analysis; Gasoloid to low tar amount cigarette sample detects, and line clogging also usually occurs, and pressure-drop in pipeline is increasing, gas velocity acute variation in the cigarette smoking process, and the sample situation that traps before and after causing is inconsistent.
The expectation of the applicant's process lot of experiments solves two subject matters in the cigarette flue gas aerosol assay technology: flue gas stops up signal piping; Aerocolloidal effective dilution is to obtain can be used for the cigarette flue gas aerosol sample that aerosoloscope is measured in the flue gas.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of detection method of feasible a kind of cigarette flue gas aerosol size-grade distribution is provided.
The objective of the invention is to be achieved through the following technical solutions:
A kind of cigarette flue gas aerosol detection method is provided, may further comprise the steps:
(1) cigarette sample produces flue gas sample flow 1 through the flue gas generating means;
(2) adopting the gas velocity that adds suction source adjusting sample flow 1 is 1mL/min～1.8mL/min;
(3) gas velocity of regulating the sample flow 3 enter aerosoloscope is 10L/min～40L/min, and dilutes;
(4) gasoloid detects.
Described flue gas generating means comprises smoking machine and solenoid valve.
The described suction source that adds is connected with pressure regulator valve.The flue gas (sample flow 1) that flows out from the flue gas generating means flows into a T-valve, and two outlets of T-valve connect pressure regulator valve and flue gas sample detection pipeline respectively, and the pressure regulator valve connection adds suction source; Perhaps one of them outlet of T-valve is connected with flowmeter, and flowmeter is connected with suction source with pressure regulator valve more successively; Perhaps one of them outlet of T-valve directly is connected with the adjustable speed suction source.
It is described that to add the requirement of suction source task performance be 1mL/min～2mL/min.
One of possibility the most, the described adjusting gas velocity of step (3) are to adopt the auxiliary gas dilution process of one-level.
The auxiliary gas dilution process of described one-level is to adopt clean compressed air to enter axial diluter and flue gas mixed diluting flue gas after pressure regulator valve is regulated flow, and the flue gas after the dilution enters aerosoloscope and detects.
Also can be to adopt clean compressed air to enter axial diluter and flue gas mixed diluting flue gas behind pressure regulator valve and flowmeter adjusting flow, the flue gas after the dilution enters aerosoloscope and detects.
As two of possibility, the described adjusting gas velocity of step (3) is to adopt the auxiliary gas dilution process of two-stage.
The auxiliary gas dilution process of described two-stage comprises:
(1) first order dilution: adopt clean compressed air to enter axial diluter and flue gas mixed diluting flue gas after pressure regulator valve is regulated flow, the flue gas after the dilution enters the DekatiDuiluter diluter;
(2) second level dilution: adopt clean compressed air through entering the flue gas mixed diluting flue gas after Dekati Duiluter diluter dilutes with (1) behind the pressure regulator valve adjusting flow and regulating sample flow 3 flow velocitys.
In the testing process, gas (the being called sample flow 3) gas velocity that enters aerosoloscope is controlled by aerosoloscope, normally a fixed value, can't regulate, its value is generally 10L/min～40L/min.
The cigarette smoke (sample flow 1) that is flowed out by the smoking machine solenoid valve of flowing through, flue gas stream speed must meet the requirement that cigarette detects and be provided with, and can not arbitrarily adjust, and detect according to difference to require its value at 1L/min～1.8mL/min.Solenoid valve detects according to cigarette and requires to be provided with, and the smoking-simulating process is generally out 2s, closes 58s, carries out repeatedly finishing up to cigarette smoking.
The invention has the beneficial effects as follows:
(1) the present invention is connected design by improving smoking machine with gas circuit between the gasoloid checkout equipment, adopting increases auxiliary gas and waste discharge device, set modes such as appropriate gas flow speed, cigarette burns and sucks and meets the requirements when guarantee gathering the flue gas aerosol sample, and enters sample concentration in the detecting device in the valid analysing range of equipment.
(2) the present invention has realized the detection to cigarette flue gas aerosol, can utilize existing aerosoloscope, does not need to detect the special-purpose gasoloid checkout equipment of exploitation for cigarette smoke.
(3) detection method effect of the present invention is remarkable, can accurately analyze the flue gas aerosol situation, provides the important technology basis to effective control cigarette quality.
When (4) application the present invention carries out the cigarette flue gas aerosol size-grade distribution detection of the high tar content of part, because the ratio of dilution is too big, in the reason of auxiliary gas one-level dilution stage owing to pressure reduction, can produce the phenomenon that sample flow 2 flows backwards, the present invention has also designed partial auxiliary gas dilution after adding suction source speed governing, auxiliary gas one-level dilution, adopt special-purpose DekatiDuiluter diluter, regulates stream pressure, prevent to flow backwards, guarantee carrying out smoothly of detection.
Description of drawings
The existing aerosoloscope of Fig. 1 directly detects the design sketch of cigarette flue gas aerosol content
The existing aerosoloscope of Fig. 2 detects the cigarette flue gas aerosol content results
Fig. 3 embodiment of the invention 2 detects gas circuit connection diagram 1
Fig. 4 embodiment of the invention 2 detects gas circuit connection diagram 2
Fig. 5 embodiment of the invention 3 detects gas circuit connection diagram 1
Fig. 6 embodiment of the invention 3 detects gas circuit connection diagram 2
Fig. 7 embodiment of the invention 4 detects gas circuit connection diagram 1
Fig. 8 embodiment of the invention 4 detects gas circuit connection diagram 2
Fig. 9 cigarette flue gas aerosol size-grade distribution of the present invention testing result
Embodiment
Further specify the present invention below in conjunction with the drawings and specific embodiments.
Cigarette smoke generating means smoking machine and solenoid valve smoking cigarette produce flue gas, adopt existing aerosoloscope directly to measure the cigarette flue gas aerosol content that flows out by smoking machine, the suction source device of detecting device itself, usually requiring sample steady air current flow velocity is 10L/min～40L/min, but, cause detecting device seriously to transship because aerosol concentration is higher than airborne situation far away in the flue gas.Testing result occurs and exceed the instrument detecting upper limit (4.0 * 10
5FA), indifference between each detected value has all reached situations such as maximal value, and the result can't carry out check and analysis as shown in Figure 1.
If the axial diluter that adopts aerosoloscope producer to provide carries out carrying out the gasoloid detection again after the cigarette smoke dilution, line clogging also still usually appears, pressure-drop in pipeline is increasing, gas velocity acute variation in the cigarette smoking process, the sample situation that traps before and after causing is inconsistent, and measurement result as shown in Figure 2.
(1) cigarette sample produces flue gas sample flow 1 through the flue gas generating means;
As shown in Figure 3, the flue gas generating means comprises smoking machine and solenoid valve, can select for use the smoking machine smoking cigarette to produce cigarette smoke, cigarette smoke (sample flow 1) is by solenoid valve smoking-simulating process, detecting requirement according to cigarette is provided with, be generally out 2s, close 58s, carry out repeatedly finishing up to cigarette smoking.
(2) adopting the gas velocity that adds suction source adjusting sample flow 1 is 1mL/min～1.8mL/min;
As shown in Figure 3, the flue gas (sample flow 1) that flows out from the flue gas generating means flows into a T-valve, two outlets of T-valve connect flue gas sample detection pipeline (sample flow 2 flow through pipeline) and flowmeter respectively, flowmeter is connected with suction source with pressure regulator valve more successively, adding the requirement of suction source task performance is 1mL/min～2mL/min, guarantees that the gas velocity of adjusting sample flow 1 is 1mL/min～1.8mL/min.
(3) gas velocity of regulating the sample flow 3 enter aerosoloscope is 10L/min～40L/min, and dilutes;
The gas velocity that the mode that adopts auxiliary gas to dilute is regulated sample flow 1 reaches 10L/min～40L/min scope.Clean compressed air enters axial diluter behind pressure regulator valve and flowmeter adjusting flow, sample flow 2 after the suction source waste discharge is regulated enters axial diluter, the two mixes, thereby regulate the gas velocity of the flow velocity control sample flow 2 of clean compressed air by pressure regulator valve, gas velocity sample flow 2=sample flow 3-assists gas, the gas velocity desired value of sample flow 3 is 10L/min～40L/min, and it is 1/8～1/3 of sample flow 1 gas velocity that the flow velocity of the auxiliary gas of adjusting makes the gas velocity of sample flow 2.
As another preferred version, the invention provides system architecture as shown in Figure 4.Adopt the regulative mode of the auxiliary gas dilution of two-stage.
(1) first order dilution: clean compressed air enters axial diluter and flue gas mixed diluting flue gas behind pressure regulator valve and flowmeter adjusting flow, the flue gas sample flow 4 after the dilution enters Dekati Duiluter diluter;
(2) second level dilution: clean compressed air enters DekatiDuiluter diluter and sample flow 4 mixed dilutings and adjusting after pressure regulator valve is regulated flow, and the sample flow flow velocity that DekatiDuiluter is flowed out in control is 10L/min～40L/min.
When the cigarette flue gas aerosol size-grade distribution of carrying out the high tar content of part detects, because the ratio of dilution is too big, in the reason of auxiliary gas one-level dilution stage owing to pressure reduction, can produce the phenomenon that sample flow 2 flows backwards, the present invention has also designed partial auxiliary gas dilution after adding suction source speed governing, auxiliary gas one-level dilution, adopt special-purpose Dekati Duiluter diluter, the dilution ratio of Dekati Duiluter diluter adopted 500: 1～100: 1, regulate stream pressure, prevent to flow backwards, guarantee carrying out smoothly of detection.
(4) detection of aerosol granularity distribution.
Ensure that by step (2) waste discharge stopping up does not appear in airflow pipeline, enter the sample gas concentration and the flow velocity of aerosoloscope again by auxiliary gas dilution control, can reach the purpose of real dilution cigarette smoke, obtain can be used for the cigarette flue gas aerosol sample that the gasoloid detector is measured.The cigarette smoke test result of samples is seen accompanying drawing 9.
Step (1) is with embodiment 2;
(2) adopting the gas velocity that adds suction source adjusting sample flow 1 is 1mL/min～1.8mL/min;
As shown in Figure 5, the flue gas (sample flow 1) that flows out from the flue gas generating means flows into a T-valve, two outlets of T-valve connect flue gas sample detection pipeline (sample flow 2 flow through pipeline) and pressure regulator valve respectively, pressure regulator valve connects suction source, the suction source task performance requires to be 1mL/min～2mL/min, guarantees that the gas velocity of adjusting sample flow 1 is 1mL/min～1.8mL/min.
(3) gas velocity of regulating the sample flow 3 enter aerosoloscope is 10L/min～40L/min, and dilutes;
The gas velocity that the mode that adopts auxiliary gas to dilute is regulated sample flow 1 reaches 10L/min～40L/min scope.Clean compressed air enters axial diluter after pressure regulator valve is regulated flow, sample flow 2 after the suction source waste discharge is regulated enters axial diluter, the two mixes, thereby regulate the gas velocity of the flow velocity control sample flow 2 of clean compressed air by pressure regulator valve, gas velocity sample flow 2=sample flow 3-assists gas, the gas velocity desired value of sample flow 3 is 10L/min～40L/min, and it is 1/8～1/3 of sample flow 1 gas velocity that the flow velocity of the auxiliary gas of adjusting makes the gas velocity of sample flow 2.
As another preferred version, the invention provides system architecture as shown in Figure 6, assist the regulative mode of gas dilution again through two-stage through the sample flow 2 after the waste discharge.
(1) first order dilution: clean compressed air enters axial diluter and sample flow 2 mixed dilutings after pressure regulator valve is regulated flow, the flue gas sample flow 4 after the dilution enters the DekatiDuiluter diluter;
(2) second level dilution: clean compressed air enters DekatiDuiluter diluter and sample flow 4 mixed dilutings and regulates the sample flow flow velocity after pressure regulator valve is regulated flow, sample flow 3 flow velocitys that Dekati Duiluter is flowed out in control are 10L/min～40L/min.
The dilution ratio of Dekati Duiluter diluter adopts 500: 1～100: 1 scopes.
(4) detection of aerosol granularity distribution.
Ensure that by step (2) waste discharge stopping up does not appear in airflow pipeline, enter the sample gas concentration and the flow velocity of aerosoloscope again by auxiliary gas dilution control, can reach the purpose of real dilution cigarette smoke, obtain can be used for the cigarette flue gas aerosol sample that the gasoloid detector is measured.The cigarette smoke test result of samples is seen accompanying drawing 9.
Step (1) is with embodiment 2.
(2) adopting the gas velocity that adds suction source adjusting sample flow 1 is 1mL/min～1.8mL/min;
As shown in Figure 7, the flue gas (sample flow 1) that flows out from the flue gas generating means flows into a T-valve, two outlets of T-valve connect flue gas sample detection pipeline (sample flow 2 flow through pipeline) and adjustable speed suction source respectively, the suction source task performance requires to be 1mL/min～2mL/min, guarantees that the gas velocity of adjusting sample flow 1 is 1mL/min～1.8mL/min.
(3) gas velocity of regulating the sample flow 3 enter aerosoloscope is 10L/min～40L/min, and dilutes;
Clean compressed air enters axial diluter after pressure regulator valve is regulated flow, sample flow 2 after the suction source waste discharge is regulated enters axial diluter, the two mixes, thereby regulate the gas velocity of the flow velocity control sample flow 2 of clean compressed air by pressure regulator valve, gas velocity sample flow 2=sample flow 3-assists gas, the gas velocity desired value of sample flow 3 is 10L/min～40L/min, and it is 1/8～1/3 of sample flow 1 gas velocity that the flow velocity of the auxiliary gas of adjusting makes the gas velocity of sample flow 2.
As another preferred version, the invention provides system architecture as shown in Figure 8, assist the regulative mode of gas dilution again through two-stage through the sample flow 2 after the waste discharge.
(1) first order dilution: clean compressed air enters axial diluter and sample flow 2 mixed dilutings after pressure regulator valve is regulated flow, the flue gas sample flow 4 after the dilution enters the DekatiDuiluter diluter;
(2) second level dilution: clean compressed air enters DekatiDuiluter diluter and sample flow 4 mixed dilutings and regulates the sample flow flow velocity after pressure regulator valve is regulated flow, sample flow 3 flow velocitys that Dekati Duiluter is flowed out in control are 10L/min～40L/min.
The dilution ratio of Dekati Duiluter diluter adopts 500: 1～100: 1 scopes.
(4) detection of aerosol granularity distribution.
Ensure that by step (2) waste discharge stopping up does not appear in airflow pipeline, enter the sample gas concentration and the flow velocity of aerosoloscope again by auxiliary gas dilution control, can reach the purpose of real dilution cigarette smoke, obtain can be used for the cigarette flue gas aerosol sample that the gasoloid detector is measured.The cigarette smoke test result of samples is seen accompanying drawing 9.
Claims (10)
1, a kind of detection method of cigarette flue gas aerosol size-grade distribution is characterized in that may further comprise the steps:
(1) cigarette sample produces flue gas sample flow 1 through the flue gas generating means;
(2) adopting the gas velocity that adds suction source adjusting sample flow 1 is 1mL/min～1.8mL/min;
(3) gas velocity of regulating the sample flow 3 enter aerosoloscope is 10L/min～40L/min, and dilutes;
(4) gasoloid detects.
2, the detection method of cigarette flue gas aerosol size-grade distribution according to claim 1 is characterized in that the described suction source that adds of step (2) is connected with pressure regulator valve.
3, the detection method of cigarette flue gas aerosol size-grade distribution according to claim 2 is characterized in that the described suction source that adds is connected with pressure regulator valve and flowmeter.
4, the detection method of cigarette flue gas aerosol size-grade distribution according to claim 2 is characterized in that the described suction source that adds is the adjustable speed suction source.
5,, it is characterized in that described to add the requirement of suction source task performance be 1mL/min～2mL/min according to the detection method of claim 1,2,3 or 4 described cigarette flue gas aerosol size-grade distribution.
6, the detection method of cigarette flue gas aerosol size-grade distribution according to claim 1 is characterized in that the described adjusting gas velocity of step (3) is to adopt the auxiliary gas dilution process of one-level.
7, the detection method of cigarette flue gas aerosol size-grade distribution according to claim 6, it is characterized in that the auxiliary gas dilution process of described one-level is to adopt clean compressed air to enter axial diluter and flue gas mixed diluting flue gas after pressure regulator valve is regulated flow, the flue gas after the dilution enters aerosoloscope and detects.
8, the detection method of cigarette flue gas aerosol size-grade distribution according to claim 6, it is characterized in that described auxiliary gas dilution process is to adopt clean compressed air to enter axial diluter and flue gas mixed diluting flue gas behind pressure regulator valve and flowmeter adjusting flow, the flue gas after the dilution enters aerosoloscope and detects.
9, the detection method of cigarette flue gas aerosol size-grade distribution according to claim 1 is characterized in that the described adjusting gas velocity of step (3) is to adopt the auxiliary gas dilution process of two-stage.
10, the detection method of cigarette flue gas aerosol size-grade distribution according to claim 9 is characterized in that the auxiliary gas dilution process of described two-stage comprises:
(1) first order dilution: adopt clean compressed air to enter axial diluter and flue gas mixed diluting flue gas after pressure regulator valve is regulated flow, the flue gas after the dilution enters the DekatiDuiluter diluter;
(2) second level dilution: adopt clean compressed air through entering the flue gas mixed diluting flue gas after Dekati Duiluter diluter dilutes with (1) behind the pressure regulator valve adjusting flow and regulating sample flow 3 flow velocitys.
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| CN102680367A (en) * | 2012-04-25 | 2012-09-19 | 广东中烟工业有限责任公司 | Method and system for detecting aerosol of smoke of cigarettes |
| CN101825553B (en) * | 2009-11-27 | 2013-01-30 | 广东中烟工业有限责任公司 | Collection and detection method for medium-tar-concentration cigarette sidestream smoke aerosol |
| CN101923035B (en) * | 2009-11-27 | 2013-04-10 | 广东中烟工业有限责任公司 | Method for collecting and detecting aerosol in side-stream smoke applicable to cigarettes having different concentrations of tar |
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| CN110220765A (en) * | 2018-07-24 | 2019-09-10 | 江苏苏净集团有限公司 | A kind of aerosol dilution device |
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| CN101825553B (en) * | 2009-11-27 | 2013-01-30 | 广东中烟工业有限责任公司 | Collection and detection method for medium-tar-concentration cigarette sidestream smoke aerosol |
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| CN102680367A (en) * | 2012-04-25 | 2012-09-19 | 广东中烟工业有限责任公司 | Method and system for detecting aerosol of smoke of cigarettes |
| US10694783B2 (en) | 2015-02-27 | 2020-06-30 | Philip Morris Products S.A. | Feedback controlled RTD adjustment for an aerosol-generating device |
| CN108426806A (en) * | 2017-02-15 | 2018-08-21 | 帕拉贡股份公司 | particulate matter measuring apparatus and its operating method |
| CN110220765A (en) * | 2018-07-24 | 2019-09-10 | 江苏苏净集团有限公司 | A kind of aerosol dilution device |
| CN112858450A (en) * | 2021-01-18 | 2021-05-28 | 中国烟草总公司郑州烟草研究院 | Cigarette smoke online collecting and ionizing device and method |
| CN113041950A (en) * | 2021-02-09 | 2021-06-29 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Gas configuration device |
| CN115625639A (en) * | 2022-11-09 | 2023-01-20 | 武汉胜安迪科技有限公司 | Grinding fluid particle size measurement counting system |
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