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Filter tip trapped HCN concentration distribution pattern measuring method

A concentration distribution and filter technology, which is applied in the field of cigarette technology research, can solve problems such as the existing filter, intercepted HCN distribution mode, etc.

Inactive Publication Date: 2013-09-11
CHINA TOBACCO HUNAN INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the above is to evaluate the filtering effect of various filters on smoke components through smoke analysis. At present, there is no research report on the distribution mode of HCN intercepted by filters in filters.

Method used

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  • Filter tip trapped HCN concentration distribution pattern measuring method
  • Filter tip trapped HCN concentration distribution pattern measuring method
  • Filter tip trapped HCN concentration distribution pattern measuring method

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Experimental program
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specific Embodiment approach

[0034] The following embodiments and examples are intended to further illustrate the present invention, but not to limit the present invention.

[0035] Taking the following six kinds of filters as an example to study the concentration distribution mode of HCN intercepted by filters: A is an ordinary filter; B is an external groove filter; C is a built-in groove filter; D is a ventilated cavity filter ; E is the column cavity filter; F is the paper vinegar composite filter.

Embodiment 1

[0037]Longitudinal distribution pattern of HCN retained by six kinds of filters

[0038] Through the radial cutting of the six kinds of filters after suction at different positions, the HCN content in each part of the filter is analyzed, the concentration of HCN intercepted in different parts of the filter is calculated, and the HCN concentration distribution in the axial direction is calculated using a polynomial By fitting, the longitudinal distribution patterns of HCN intercepted by six unstructured filters were obtained. figure 2 Longitudinal distribution patterns of HCN retained by six kinds of filters. The concentration of HCN intercepted by ordinary filters showed a decreasing trend from the cut tobacco end to the smoking end of the filter ( figure 2 , A). The structural changes of the external groove filter and the internal groove filter have a significant impact on the longitudinal distribution pattern of HCN. In the part where the structure of the filter changes,...

Embodiment 2

[0040] Cross-sectional radial distribution patterns of six kinds of filters intercepting HCN

[0041] Different from the longitudinal distribution mode, in the research on the radial distribution of HCN intercepted by filters, the filters were cut in concentric circles with different radii in the radial direction on the basis of three equal parts in the radial direction of the filters. Because the diameter of the filter tip is only about 7.6mm, only two concentric circles with different radii are cut in the radial direction, that is, R 1 =1.26mm, R 2 =2.52mm. Analyze the amount of HCN in the inner and outer parts of the filter respectively after cutting (the three-section filter is combined), and calculate and use the relationship model between the radial cutting HCN loss rate and the cutting area to correct, and then the equidistant distance of the filter can be obtained. The amount and concentration of HCN retained inside, in, and outside. The polynomial fitting was carri...

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Abstract

The invention discloses a filter tip trapped HCN concentration distribution pattern measuring method which comprises the following steps: concentrically cutting a sucked filter tip along the axis after radially cutting with a laser, or radially cutting a sucked filter tip after concentrically cutting along the axis; after finishing cutting, separating the annular filter tip sections from the corresponding number of cylindrical filter tip sections, carrying out quantitative analysis on the HCN content in the cut and separated filter tip sections; and after calculating the HCN concentration, carrying out polynomial fitting on filter tip trapped HCN concentration distribution data, or carrying out polynomial fitting and interpolation analysis to obtain the filter tip trapped HCN concentration distribution pattern. By measuring the longitudinal, cross section radial and spatial distribution pattern of different filter tip trapped HCN concentrations, the invention can master the filtration trapped distribution characteristics of HCN in filter tips in different structures, can quantitatively analyze the HCN trapping efficiency and contribution of all parts of filter tips in different structures in flue gas, and can be used for evaluation of flue gas HCN filtering quality of functional filter tips and design improvement of the functional filter tips.

Description

technical field [0001] The invention relates to a method for measuring the concentration distribution pattern of HCN intercepted by a filter tip, and belongs to the field of cigarette technology research. Background technique [0002] Cigarette filters can effectively intercept tar and other harmful components in mainstream smoke. When developing low-tar cigarette products, improving the smoke retention efficiency of filters is often the first choice of researchers. With the continuous expansion of the market for low-tar and ultra-low-tar cigarette products, more and more researches have been conducted on the interception efficiency, interception law and interception mechanism of various components in mainstream smoke by filters of various materials and specifications. Pay attention to. Keith first studied the mechanism of smoke filtering by filters, and the research results showed that there are three main ways of filtering smoke particles in filters: inertial collision, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00G01N1/28
Inventor 文建辉杜文钟科军彭斌张晓兵刘惠民
Owner CHINA TOBACCO HUNAN INDAL CORP
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