CN109297854B - Method for rapidly measuring real mixing ratio of cut stems in strip running silks - Google Patents
Method for rapidly measuring real mixing ratio of cut stems in strip running silks Download PDFInfo
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- CN109297854B CN109297854B CN201811097882.2A CN201811097882A CN109297854B CN 109297854 B CN109297854 B CN 109297854B CN 201811097882 A CN201811097882 A CN 201811097882A CN 109297854 B CN109297854 B CN 109297854B
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- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses a method for rapidly measuring the solid blending proportion of cut stems in running strips, which comprises the following steps: testing the nicotine and chlorine content in cut leaves and cut stems; calculating the content of nicotine and chlorine in the blending mixed material according to the blending proportion; testing the nicotine and chlorine content in the running strip; fourthly, calculating the actual proportion of the cut stems in the strip running silks; v to XN、XClPerforming reliability judgment, and taking XN、XClThe average value of the ratio is the actual ratio X of the cut stems in the cigarettes. The method of the invention has the advantages of no need of modeling, simplicity, rapidness and accurate and reliable result.
Description
Technical Field
The invention belongs to the technical field of tobacco, and particularly relates to a method for rapidly measuring the solid blending proportion of cut stems in shredded tobacco strips.
Background
The blending application of the cut stems in the cigarette formula has important significance for saving raw material cost, reducing harm and tar of cigarettes and the like. With the upgrading and perfecting of the cut stem making technology, the blending proportion of the cut stems is continuously improved, and the influence on the quality of cigarettes is more and more prominent. On-line test results of production samples show that the cut stem morphological structure is an important factor influencing the quality stability of cigarettes, and under the condition of the same set blending proportion of cut stems, the ratio of cut stems which finally enter cigarettes by different cut stem morphological structures is greatly different, so that the quality stability of cigarettes is influenced. The reason is that part of the fine cut stem shreds are lost due to screening, removing and adsorption in the processes of mixing, conveying, rolling by a cigarette making machine and the like.
In recent years, with the rise of 'medium short and fine cigarettes', the parameters (such as the diameter or the length of the cigarettes) of the cigarettes are changed, so that the existing cigarette compatibility technology and cut stem processing conditions cannot meet the requirements. For example, because the diameter of a fine cigarette is smaller, the width of the cut tobacco is usually required to be reduced in the process so as to improve the distribution uniformity in the running strip tobacco, reduce the incidence rate of the bamboo joint tobacco and improve the smoking resistance stability of the cigarette. The reduction of the cutting width leads to the structural difference of the cut tobacco, so the compatible cut stem also needs to be matched in the process, and therefore, the thin-pressing and fine-cutting cut stem can be produced. In the blending process of cut stems with smaller specifications and sizes, a more serious loss phenomenon exists, namely, the ratio of the cut stems actually blended into cigarettes is lower than the design ratio, and the quality stability of the cigarettes cannot be ensured.
Chinese patent CN106896032A discloses a method for measuring the uniformity of cut tobacco, cut stems and reconstituted tobacco formula cut tobacco. The method establishes a total cellulose method for evaluating the blending uniformity of materials according to the content difference of cellulose and total sugar in tobacco shreds, cut stems and reconstituted tobacco leaves. The method does not need modeling and marker addition, is convenient to operate, but cannot represent the actual mixing proportion of the materials, particularly the cut stems.
Chinese patent CN103263069A discloses a method for representing blending uniformity of cut leaves, expanded cut stems and cut stems. The method comprises the steps of measuring the filling value and the shred breaking rate of standard samples of mixed tobacco shreds with different mixing ratios, establishing a mathematical model for correlating the mixing ratios with the filling value and the shred breaking rate of the mixed tobacco shreds, measuring the filling value and the shred breaking rate of the samples to be measured, and representing the uniformity of the mixed tobacco shreds according to the mathematical model. However, in actual production, tobacco materials are crushed to different degrees, and the fluctuation of the filling value and the shredding rate is large, so that the method is low in precision, and the actual mixing proportion of the materials cannot be really represented.
Chinese patent CN104198325A discloses a method for measuring the ratio of cut stems in cut tobacco based on computer vision. The method comprises the steps of respectively acquiring images of all components of tobacco shreds to be detected by using an image acquisition system, then acquiring image characteristics of all components of the tobacco shreds to be detected, calculating characteristic data quantity of cut stems, and establishing a characteristic database. And analyzing and identifying the cut stem components according to the correlation degree calculation result, sorting cut stems in the cut tobacco to be detected by a sorting system, weighing and calculating the cut stem component proportion, wherein the cut stem component proportion obtained by the method has higher precision. However, the modeling process of the method needs a large amount of sample accumulation, and when the morphological structure of the cut stems changes, the modeling needs to be carried out again, so that the method is not flexible. Meanwhile, due to the introduction of an image acquisition system and a sorting system, the method has high cost and complex operation, and is not suitable for online analysis and determination of cut stem production.
Nicotine and chlorine are two important chemical indexes in tobacco, and are one of evaluation indexes reflecting the internal quality of tobacco. The applicant unexpectedly finds that the contents of nicotine and chlorine in the cut leaves and the cut stems are stable, the contents of nicotine and chlorine in the cut leaves and the contents of nicotine and chlorine in the cut stems are different and stable in difference, and meanwhile, in an actual test, the error of measuring the contents of nicotine and chlorine is small, and the interference of other components is not easy.
Disclosure of Invention
In order to solve the problems, the invention discloses a method for quickly estimating the real mixing proportion of cut stems in strip running silk, and the strip running silk is directly used for rolling cigarettes and can be the same as the cut tobacco in the cigarettes. The technical scheme of the invention is as follows:
all samples and nicotine and chlorine contents, ratios and percentages of the present invention are in units of weight unless otherwise indicated.
A method for estimating the stem silk mixing proportion in the running strip silk comprises the following steps:
respectively taking a plurality of samples of cut leaves and cut stems, testing the nicotine and chlorine content in the cut leaves according to a standard, and taking an average value as YN、YCl(ii) a Testing the content of nicotine and chlorine in the cut stems according to a standard, and taking an average value and recording as GN、GCl；
② the blending proportion of the cut stems is X0Mixing cut stems and cut leaves on line, mixing in drum to obtain mixed material (formula shred), calculating the nicotine and chlorine content of mixed material as HN、HCl；
Taking a plurality of samples of the running strip silk, testing the nicotine and chlorine content in the running strip silk according to the standard, and taking the average value as PN、PCl；
Fourthly, calculating the X of the cut stems in the strip running silk according to the numerical valuesN、XCl：
XN＝X0-(HN-PN)/(GN-YN)
XCl＝X0-(HCl-PCl)/(GCl-YCl)；
V to XN、XClAnd judging the reliability, and if the following conditions are met:
|XN-XClwhen the | < 1.0%
Taking XN、XClThe average value of (A) is the real stem silk doping ratio X in the running strip silk:
X＝(XN+XCl)/2。
preferably, the number of the samples in the steps I, II and III is more than 5, and the detection values of nicotine and chlorine content in the samples respectively meet the RSD percent of less than or equal to 2.5 percent.
Preferably, the standard described in steps (r), (c) and (c) is YC/T426-2012.
The method comprises the following specific steps: a method for rapidly estimating the real blending proportion of cut stems in a strip running cut comprises the main steps of sampling and sample preparation, content measurement, method error judgment, cut stem loss calculation, reliability judgment and cut stem proportion calculation in the strip running cut;
1. sampling and sample preparation: taking pure leaf shreds, pure stem shreds and strip shreds, respectively preparing more than or equal to 5 parts of parallel sample, and recording the designed mixing amount X of the stem shreds0；
2. Content determination: respectively measuring the nicotine and chlorine contents of each parallel sample according to a method specified by the determination of the YC/T426-2012 tobacco uniform mixing degree, and taking and recording the average value of the nicotine and chlorine contents;
3. method error determination: sequentially analyzing the measured values of the nicotine and the chlorine content of each parallel sample, calculating and evaluating the RSD% value of the nicotine and the chlorine content of each sample, and if the RSD% is more than 2.5%, sampling again and measuring;
4. calculating the loss amount of the cut stems: if RSD% is less than or equal to 2.5%, respectively calculating the cut stem loss X according to the content difference of nicotine and chlorine in cut leaves and cut stems, blended and mixed formula cut stems and strip running cut stemsSN、XSCl. Wherein HN、HCl，PN、PCl，GN、GCl，YN、YClRespectively the nicotine content and the chlorine content in the mixed formula silk, the mixed slivers, the pure stem silk and the pure leaf silk;
XSN＝(HN-PN)/(GN-YN)
XSCl＝(HCl-PCl)/(GCl-YCl)
6. calculating the actual ratio X of the cut stems in the strip-running cut according to the following formulaN、XCl；
XN＝X0-XSN
X Cl＝X0-XSCl
7. And (3) reliability judgment: to XN、XClAnd (3) carrying out reliability judgment: if | XN-XClIf the ratio of the stems in the running strip silk is less than or equal to 1.0 percent, the mixing ratio X of the stems in the running strip silk is XN、XClIs (X), X ═ XN+XCl) 2; if | XN-XClIf | is greater than 1.0%, the sample may not be uniform enough and the sample may need to be re-mixed for testing and calculation.
The invention has the beneficial effects that:
1. the applicant finds that the contents of nicotine and chlorine in the cut leaves and the cut stems are stable, the contents of nicotine and chlorine in the cut leaves and the contents of nicotine and chlorine in the cut stems are different and stable in difference, and meanwhile, in an actual test, the content measurement error of nicotine and chlorine is small, the interference of other components is not easy, and the sensitivity is high. Wherein the nicotine content of the pure cut tobacco leaves is about 4-10 times higher than that of the cut stems, and the chlorine content of the cut stems is about 2-7 times higher than that of the pure cut tobacco leaves.
2. The method estimates the real blending proportion of the cut stems finally blended into the strip running cut tobacco according to the actual state of the cut tobacco in the production process. The strip running threads are directly used for rolling cigarettes and can be the same as the tobacco threads in the cigarettes. The method has the advantages of no need of modeling, simplicity, rapidness and accurate and reliable result.
Detailed Description
The present invention will be described in more detail with reference to the following examples, but the scope of the present invention is not limited thereto.
All samples and nicotine and chlorine contents, ratios and percentages of the present invention are in units of weight unless otherwise indicated.
Example 1: estimation of cut-to-stem ratio in a laid-open sliver
The invention discloses a method for quickly estimating the real blending proportion of cut stems in a strip running cut.
Taking 7 parts of pure cut tobacco and pre-blended cut stem respectively by adopting an online cross section sampling method, wherein each part is 200 g; adding cut stems on line according to a designed cut stem mixing proportion of 10%, feeding the cut stems mixed in the roller into a cut stem storage cabinet, and feeding the cut stems into a cigarette machine through a cut stem adding machine to be rolled; taking 7 parts of strip running shreds at a cigarette making machine, wherein each part is 200 g; the nicotine and chlorine contents in the pure cut tobacco, cut stem, formula cut tobacco and slivers were measured according to YC/T426-2012 method, and are shown in table 1 below.
TABLE 1 Nicotine and chlorine content recording and analysis table for each sample in the running thread
And (3) judging the error of the method according to the data of the nicotine and chlorine contents of the samples in the table 1, wherein the analysis results in the table 1 show that the measured values of the nicotine and chlorine contents of the samples meet the requirement that the RSD percent is less than 2.5 percent, and the measurement precision of the method meets the requirement. Then calculating the loss X of the cut stems according to the nicotine chlorine content difference value of the pure cut leaves and the cut stems, the blended and mixed formula cut and the running strip cutZN＝1.4308％、XZCl1.6583%. And (3) reliability judgment: i XN-XClLess than or equal to 1.0 percent; taking the mean value of the two to obtain the loss X of the cut stem in the actual processZSWhen the ratio is 1.5446%, the ratio of the stalk in the running strip silk is XZ＝8.4554％。
The result of the method provided by Chinese patent CN104198325A for testing the mixing proportion of the cut stems in the running strips is 8.77983%; the test method of the invention has accurate and reliable result.
Example 2: estimation of cut-to-stem ratio in a laid-open sliver
Taking 7 parts of pure cut tobacco and pre-blended cut stem respectively by adopting an online cross section sampling method, wherein each part is 200 g; adding 12% of cut stems on line according to the designed cut stem mixing proportion, feeding the cut stems mixed in the roller into a cut stem storage cabinet, and feeding the cut stems into a cigarette machine through a cut stem adding machine to be rolled; taking 7 parts of strip running shreds at a cigarette making machine, wherein each part is 200 g; the nicotine and chlorine contents in the pure cut tobacco, cut stem, formula cut tobacco and slivers were measured according to YC/T426-2012 method, and are shown in table 2 below.
TABLE 2 Nicotine and chlorine content recording and analyzing table for each sample in the running thread
And (3) judging the error of the method according to the data of the nicotine and chlorine contents of the samples in the table 2, wherein the analysis results in the table 2 show that the measured values of the nicotine and chlorine contents of the samples meet the requirement that the RSD percent is less than 2.5 percent, and the measurement precision of the method meets the requirement. Then calculating the loss X of the cut stems according to the nicotine chlorine content difference value of the pure cut leaves and the cut stems, the blended and mixed formula cut and the running strip cutZN＝2.9602％、XZCl3.3039%. And (3) reliability judgment: i XN-XClLess than or equal to 1.0 percent; taking the mean value of the two to obtain the loss X of the cut stem in the actual processZSWhen the ratio is 3.1321%, the ratio of running strip silk to running stem silk is XZ＝8.8679％。
The result of the method provided by Chinese patent CN104198325A for testing the mixing proportion of the cut stems in the running strips is 9.0112%; the test method of the invention has accurate and reliable result.
Claims (1)
1. A method for measuring the stem silk mixing proportion in the running silk is characterized by comprising the following steps:
respectively taking a plurality of samples of cut leaves and cut stems, testing the nicotine and chlorine content in the cut leaves according to a standard, and taking an average value as YN、YCl(ii) a Testing the content of nicotine and chlorine in the cut stems according to a standard, and taking an average value and recording as GN、GCl；
② the blending proportion of the cut stems is X0Mixing cut stems and cut leaves on line, mixing in drum to obtain cut tobacco, calculating the content of nicotine and chlorine in the cut tobacco to be HN、HCl；
Taking multiple samples of running strip silkThe product is prepared by testing nicotine and chlorine content in running thread according to standard, and taking average value as PN、PCl；
Fourthly, calculating the X of the cut stems in the strip running silk according to the numerical valuesN、XCl：
XN＝X0-(HN-PN)/(GN-YN)
XCl＝X0-(HCl-PCl)/(GCl-YCl)；
V to XN、XClAnd judging the reliability, and if the following conditions are met:
|XN-XClwhen the | < 1.0%
Taking XN、XClThe average value of (A) is the real stem silk doping ratio X in the running strip silk:
X＝(XN+XCl)/2；
the number of the samples in the first step, the second step and the third step is more than 5, and the detection values of nicotine and chlorine content in the samples respectively meet the requirement that RSD is less than or equal to 2.5%; the standard is YC/T426-2012.
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| CN111610276A (en) * | 2020-06-09 | 2020-09-01 | 甘肃烟草工业有限责任公司 | Cigarette raw material mixing proportion distribution measuring method based on tobacco characteristic components |
| CN112924596A (en) * | 2021-01-27 | 2021-06-08 | 上海烟草集团有限责任公司 | Method for measuring cut tobacco stem rate of cigarette based on nicotine content |
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