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Cigarette flue gas aerosol grain size distribution detection method

A technology of particle size distribution and cigarette smoke, which is applied in the detection of particle size distribution of cigarette smoke aerosols, and in the field of detecting the distribution of aerosol particles of different particle sizes in cigarette smoke, which can solve pipeline blockage, detection results exceeding, detection Overload and other problems, to prevent backflow, the effect is remarkable

Active Publication Date: 2008-08-13
CHINA TOBACCO GUANGDONG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the existing aerosol detector is used to measure cigarette smoke, because the concentration of aerosol in the smoke is much higher than that in the air, the detector is seriously overloaded
The detection result exceeds the detection limit of the instrument (4.0×10 5 fA), there is no difference between the detected values, and all of them have reached the maximum value, etc., and the detection and analysis cannot be carried out.
Even if the sample dilution device provided by the aerosol detector manufacturer is used, the sample with high tar content still cannot meet the requirements and cannot be tested and analyzed; for the aerosol detection of low-tar cigarette samples, the pipeline is often blocked, and the pipeline The pressure drop is getting bigger and bigger, and the gas flow rate changes drastically during the cigarette smoking process, resulting in inconsistencies in the captured samples before and after.

Method used

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  • Cigarette flue gas aerosol grain size distribution detection method
  • Cigarette flue gas aerosol grain size distribution detection method
  • Cigarette flue gas aerosol grain size distribution detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Cigarette smoke generating device Smoking machine and electromagnetic valve suck cigarettes to generate smoke. The existing aerosol detector is used to directly measure the aerosol content of cigarette smoke flowing out of the smoking machine. The suction source device of the detector itself usually requires The stable flow rate of the measured sample airflow is 10L / min~40L / min, but because the aerosol concentration in the flue gas is much higher than that in the air, the detector is seriously overloaded. The detection result exceeds the detection limit of the instrument (4.0×10 5 fA), there is no difference between each detected value, and all have reached situations such as maximum value, and the result is as shown in accompanying drawing 1, can't carry out detection and analysis.

[0041] If the axial diluter provided by the manufacturer of the aerosol detector is used to dilute the cigarette smoke and then carry out aerosol detection, the pipeline is still often blo...

Embodiment 2

[0043] (1) The cigarette sample passes through the smoke generating device to generate a smoke sample stream 1;

[0044] As shown in Figure 3, the smoke generating device includes a smoking machine and a solenoid valve. The smoking machine can be used to suck cigarettes to generate cigarette smoke. The setting is usually 2 seconds on and 58 seconds off, and it is repeated until the cigarette is smoked.

[0045] (2) Use an external suction source to adjust and adjust the air velocity of sample flow 1 to 1mL / min~1.8mL / min;

[0046] As shown in Figure 3, the flue gas (sample flow 1) flowing out from the flue gas generating device flows into a three-way valve, and the two outlets of the three-way valve are respectively connected to the flue gas sample detection pipeline (sample flow 2 flows through the pipeline) and the flow rate The meter and the flow meter are then connected to the pressure regulating valve and the suction source in turn. The working efficiency of the additiona...

Embodiment 3

[0056] Step (1) is with embodiment 2;

[0057] (2) Use an external suction source to adjust and adjust the air velocity of sample flow 1 to 1mL / min~1.8mL / min;

[0058] As shown in Figure 5, the flue gas (sample flow 1) flowing out from the flue gas generating device flows into a three-way valve, and the two outlets of the three-way valve are respectively connected to the flue gas sample detection pipe (sample flow 2 flows through the pipe) and the regulating pipe. The pressure valve and the pressure regulating valve are connected to the suction source, and the working efficiency of the suction source is required to be 1mL / min to 2mL / min, so as to ensure that the air velocity of sample flow 1 is adjusted to be 1mL / min to 1.8mL / min.

[0059] (3) Adjust the air velocity of the sample flow 3 entering the aerosol detector to be 10L / min~40L / min, and dilute it;

[0060] The gas flow rate of the sample flow 1 is adjusted to a range of 10 L / min to 40 L / min by means of auxiliary gas di...

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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 [0001] The invention belongs to the technical field of aerosol detection, and in particular relates to a method for detecting the distribution of aerosol particles with different particle sizes in cigarette smoke, that is, a method for detecting the particle size distribution of aerosol in cigarette smoke. Background technique [0002] In the prior art, the process of measuring the particle size distribution of the aerosol in the air by the aerosol detector is as follows: through the suction source device of the detector itself, the gas sample is sucked outward at a steady flow rate of 10L / min-40L / min; When the sample concentration is high, an axial diluter can also be connected to dilute the sample. [0003] When the existing aerosol detector is used to measure cigarette smoke, the detector is seriously overloaded because the concentration of aerosol in the smoke is much higher than that in the air. The detection result exceeds the detection limit of the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02G01N1/24G01N1/38
Inventor 孔浩辉沈光林李峰
Owner CHINA TOBACCO GUANGDONG IND
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