CN103675218A - Method for indicating uniformity of tobacco leaf pulp reproduced by using paper-making process - Google Patents

Abstract

The invention discloses a method for indicating the uniformity of tobacco leaf pulp reproduced by using a paper-making process. The method comprises the following steps: dividing pulping batch time into T equal time intervals, forming T+2 sampling time points according to the time sequence, calculating the uniformity of the tobacco leaf pulp reproduced by using the paper-making process at a time point i, and calculating the uniformity of the tobacco leaf pulp reproduced by using the paper-making process in one pulping batch, wherein T is more than or equal to 3; judging the uniformity of tobacco leaves reproduced by using the paper-making process in one pulping batch according to the calculated uniformity of the tobacco leaf pulp reproduced by using the paper-making process. According to the method, the uniformity of the reproduced tobacco leaf pulp can be judged rapidly and accurately, the pulping process of the reproduced tobacco leaves is optimized, and the quality of the reproduced tobacco leaves is improved.

Description

A kind of papermaking-method reconstituted tobaccos slurry uniformity coefficient characterizing method

Technical field

The invention belongs to reconstituted tobacco technology field, relate to papermaking-method reconstituted tobaccos pulping process stock quality evaluation method.

Technical background

About controlling the method for papermaking-method reconstituted tobaccos slurry uniformity coefficient, relevant report is as follows:

Chinese patent CN201310060855.9 discloses a kind of reduction papermaking-method reconstituted tobaccos two sides difference method, to adopt the reverse side of atomizer after substrate coating quantitatively to spray atomization tap water humidification method, increase thin slice reverse side coating fluid mobility, impel reverse side coating fluid further to front, to permeate, reduce pros and cons coating weight difference in distribution, reach thin slice pros and cons coating weight uniformity.

Chinese patent CN201210292967.2 provides a kind of papermaking-method reconstituted tobaccos pulping process, comprise the following steps: after tobacco sheet material is mixed, carry out lixiviate, by lixiviate gained material isolated by filtration, gained insoluble composition is mixed as pulping raw material; Pulping raw material is carried out to slurrying to be adjusted dense; Adopt multistage pulping process, the slurry of gained is pulled an oar.Pulping process provided by the present invention, fully retaining fibre length, when effectively improving the weight in wet base of slurry, can also fully discongest the small pieces in tobacco slurry and various feed particles, keep form and the size of fiber even, effectively improve tobacco substrate evenness.

Chinese patent CN201110371448.0 provides the method for utilizing near infrared spectrum to detect reconstituted tobacco thickness in papermaking, comprises collection sample, modeling sample screening, gathers original spectrum, spectrum pre-service, sets up quantitative model, optimizes the steps such as quantitative model, model testing, mensuration reconstituted tobacco thickness.The inventive method can detect the thickness of papermaking-method reconstituted tobaccos rapidly and accurately.

Chinese patent CN201110371448.0 discloses a kind of appearance color detection method for reconstituted tobacco by papermaking method.By the even property of color of the absolute value representation sample of the difference of monolithic sample measurement value and mean value, with the aberration of the absolute value representation testing sample of the difference of brightness value mean value, red green value mean value, champac value mean value and the standard items measured value of sample.If there are two in color homogeneity desired value, do not meet above Δ LN≤2.0, Δ AN≤1.5, the regulation of Δ BN≤1.5, judges that color homogeneity is defective.If occur one and do not meet above Δ L≤2.5, Δ A≤1.5, Δ B≤1.5 regulation in value of chromatism, judge that aberration is defective.The erroneous judgement that the method has effectively avoided the subjective factor due to sense organ to cause, makes appearance color index by the description of qualitativeization, be changed into the data target of quantification, guarantees accuracy and the consistance judged.

How foregoing invention improves the thinking that papermaking-method reconstituted tobaccos quality is new, new means and methods to providing.But up to the present, there is no the method that characterizes slurry uniformity coefficient in papermaking-method reconstituted tobaccos pulping process.

Summary of the invention

The object of the invention is to solve prior art and there is no the problem that how to characterize slurry uniformity coefficient, a kind of method that can quick and precisely judge reconstructed tobacco leaf slurry uniformity coefficient is provided, optimize reconstituted tobacco pulping process, improve the papermaking-method reconstituted tobaccos slurry uniformity coefficient characterizing method of reconstituted tobacco quality.

Object of the present invention is achieved through the following technical solutions:

A papermaking-method reconstituted tobaccos slurry uniformity coefficient characterizing method, method step is as follows:

1) a slurrying batch time is uniformly-spaced divided into T >=3 time period, forms in chronological order T+2 sampling time point,

2) calculate i time point papermaking-method reconstituted tobaccos slurry uniformity coefficient:

A. each time point i detects papermaking-method reconstituted tobaccos online concentration and enriched water concentration 5 times simultaneously, calculates each time point i online concentration N _ijwith enriched water concentration W _ijratio X _i:

$X_i=\frac{N_{\mathrm{ij}}}{W_{\mathrm{ij}}};$

Wherein, i=1,2 ... T+2 is 1,2 of a slurrying batch ... one of T+2 time point; J=1,2 ... 5;

B. calculate the average of i time point online concentration and enriched water concentration ratio:

${\stackrel{\‾}{X}}_i=\frac{1}{5}(X_1+X_2+\·\·\·{+x}_5);$

C. calculate standard variance:

$S_{\mathrm{td}}=\sqrt{\frac{1}{4}\underset{i=1}{\overset{5}{\mathrm{\Σ}}}{(X_i-{\stackrel{\‾}{X}}_i)}^2};$

D. calculate the coefficient of variation:

${\mathrm{CV}}_i(\%)=\frac{S_{\mathrm{td}}}{{\stackrel{\‾}{X}}_i}\×100\%;$

E. calculate i time point papermaking-method reconstituted tobaccos slurry uniformity coefficient:

U _i=100％-CV _i ％；

3) calculate a slurrying batch papermaking-method reconstituted tobaccos slurry uniformity coefficient:

A. measure slurrying of reconstituted tobacco batch 1,2 ... T+2 time point online concentration and enriched water concentration 5 times; Calculate i time point online concentration N _ijwith enriched water concentration W _ijratio:

$X_i=\frac{N_{\mathrm{ij}}}{W_{\mathrm{ij}}};$

Wherein, i=1,2 ... T+2 is 1,2 of a slurrying batch ... one of T+2 time point; J=1,2 ... 5;

B. calculate the average of a slurrying batch online concentration and enriched water concentration ratio:

$\stackrel{\‾}{X}=\frac{1}{T+2}(\stackrel{\‾}{X_1}+\stackrel{\‾}{X_2}+\·\·\·+\stackrel{\‾}{X_{T+2}});$

C. calculate standard variance:

$S_{\mathrm{td}}=\sqrt{\frac{1}{5\×(T+2)-1}\underset{K=1}{\overset{5\×(T+2)}{\mathrm{\Σ}}}{(X_k-\stackrel{\‾}{X})}^2};$

D. calculate the coefficient of variation:

$\mathrm{CV}(\%)=\frac{S_{\mathrm{td}}}{\stackrel{\‾}{X}}\×100\%;$

E. calculate a slurrying batch papermaking-method reconstituted tobaccos slurry uniformity coefficient:

U=100％-CV％；

According to the papermaking-method reconstituted tobaccos slurry uniformity coefficient of calculating, judge the papermaking-method reconstituted tobaccos homogeneity of a slurrying batch; Work as U _i>=90 (i=1,2....T+2), U>=90 o'clock, slurry meets reconstituted tobacco pulping requirements; Work as U _ione of them is less than at 90 o'clock (i=1,2...T+2), U, and this batch of slurry do not reach process quality requirement.

The present invention is directed in current reconstituted tobacco production run, especially in pulping process, there is no the problem that how to characterize slurry uniformity coefficient, a kind of paper process papermaking-method reconstituted tobaccos slurry uniformity coefficient characterizing method is provided.The present invention can quick and precisely judge reconstructed tobacco leaf slurry uniformity coefficient, optimizes reconstituted tobacco pulping process, improves reconstituted tobacco product quality.

Embodiment

Embodiment 1

Dui Mou reconstituted tobacco manufacturing plant, slurrying batch of certain trade mark tobacco leaf product, be uniformly-spaced divided into 3 time periods, forms in chronological order 5 sampling time points;

(1) each time point i detects reconstituted tobacco online concentration and enriched water concentration 5 times simultaneously, calculates the online concentration of 5 times and the ratio of enriched water concentration; Calculate online concentration N _{5 * 5}with enriched water concentration W _{5 * 5}(i=1,2 ... T+2, j=1,2 ... 5) average, standard variance, the coefficient of variation, the uniformity coefficient of ratio; Result is as shown in table 1:

Showing average, standard variance, the coefficient of variation, the uniformity coefficient of 1:5 the online concentration/enriched water of sampling time point concentration calculates

From table 1 result, obtain:

U ₁=94.748；U ₂=92.102；U ₃=92.653；U ₄=97.973；U ₅=98.373；

(2) calculate average, standard variance, the coefficient of variation, the uniformity coefficient of this slurrying batch online concentration N and enriched water concentration W, result of calculation is as shown in table 2:

Average, standard variance, the coefficient of variation, the uniformity coefficient of this slurrying of table 2 batch online concentration N and enriched water concentration W

Mean value	2.527
		Standard variance	0.226
The coefficient of variation/%	8.950
		Uniformity coefficient	91.050

From table 2 result, obtain: this slurrying batch uniformity coefficient is U=91.050

(3) uniformity coefficient U _i>=90 (i=1,2....5), U>=90, judge that the slurry of this batch meets reconstituted tobacco pulping requirements.

Embodiment 2

Dui Mou reconstituted tobacco manufacturing plant, slurrying batch of certain trade mark tobacco leaf product, be uniformly-spaced divided into 8 time periods, forms in chronological order 10 sampling time points;

(1) each time point i detects reconstituted tobacco online concentration and enriched water concentration 5 times simultaneously, calculates the online concentration of 5 times and the ratio of enriched water concentration; Calculate online concentration N _{10 * 5}_ with enriched water concentration W _{10 * 5}_ (i=1,2 ... T+2, j=1,2 ... 5) average, standard variance, the coefficient of variation, the uniformity coefficient of ratio; Result is as shown in table 3:

Showing average, standard variance, the coefficient of variation, the uniformity coefficient of 3:10 the online concentration/enriched water of sampling time point concentration calculates

From table 3 result, obtain: U ₁=95.406; U ₂=92.529; U ₃=92.653; U ₄=95.523; U ₅=92.551; U ₆=94.465; U ₇=92.564; U ₈=95.511; U ₉=90.897; U ₁₀=91.852;

(2) calculate average, standard variance, the coefficient of variation, the uniformity coefficient of this slurrying batch online concentration N and enriched water concentration W, result of calculation is as shown in table 4:

Average, standard variance, the coefficient of variation, the uniformity coefficient of this slurrying of table 4 batch online concentration N and enriched water concentration W

Mean value	2.661
		Standard variance	0.205
The coefficient of variation/%	7.697
		Uniformity coefficient	92.303

From table 4 result, obtain: this slurrying batch uniformity coefficient is U=92.303.

(3) uniformity coefficient U _i>=90 (i=1,2....10), U>=90, judge that the slurry of this batch meets reconstituted tobacco pulping requirements.

Embodiment 3

Dui Mou reconstituted tobacco manufacturing plant, slurrying batch of certain trade mark tobacco leaf product, be uniformly-spaced divided into 5 time periods, forms in chronological order 7 sampling time points;

(1) each time point i detects reconstituted tobacco online concentration and enriched water concentration 5 times simultaneously, calculates the online concentration of 5 times and the ratio of enriched water concentration; Calculate online concentration N _{7 * 5}_ with enriched water concentration W _{7 * 5}_ (i=1,2 ... T+2, j=1,2 ... 5) average, standard variance, the coefficient of variation, the uniformity coefficient of ratio; Result is as shown in table 5:

Showing average, standard variance, the coefficient of variation, the uniformity coefficient of 5:7 the online concentration/enriched water of sampling time point concentration calculates

From table 5 result, obtain:

U ₁=89.224；U ₂=92.102；U ₃=97.684；U ₄=96.445；U ₅=98.373；U ₆=92.551；U ₇=92.308；

(2) calculate average, standard variance, the coefficient of variation, the uniformity coefficient of this slurrying batch online concentration N and enriched water concentration W, result of calculation is as shown in table 6:

Average, standard variance, the coefficient of variation, the uniformity coefficient of this slurrying of table 6 batch online concentration N and enriched water concentration W

Mean value	2.664
		Standard variance	0.198
The coefficient of variation/%	7.433
		Uniformity coefficient	92.567

From table 6 result, obtain: this slurrying batch uniformity coefficient is U=92.567;

(3) uniformity coefficient U1=89.224 < 90 wherein, the slurry of this batch does not reach the reconstituted tobacco process quality requirement of manufacturing paper with pulp, and should rectify and improve in time pulping process existing problems.

Claims (1)

1. a papermaking-method reconstituted tobaccos slurry uniformity coefficient characterizing method, is characterized in that, method step is as follows:

1) a slurrying batch time is uniformly-spaced divided into T >=3 time period, forms in chronological order T+2 sampling time point,

2) calculate i time point papermaking-method reconstituted tobaccos slurry uniformity coefficient:

A. each time point i detects papermaking-method reconstituted tobaccos online concentration and enriched water concentration 5 times simultaneously, calculates each time point i online concentration N _ijwith enriched water concentration W _ijratio X _i:

$X_i=\frac{N_{\mathrm{ij}}}{W_{\mathrm{ij}}};$

Wherein, i=1,2 ... T+2 is 1,2 of a slurrying batch ... one of T+2 time point; J=1,2 ... 5;

B. calculate the average of i time point online concentration and enriched water concentration ratio:

${\stackrel{\&OverBar;}{X}}_i=\frac{1}{5}(X_1+X_2+\&CenterDot;\&CenterDot;\&CenterDot;{+x}_5);$

C. calculate standard variance:

$S_{\mathrm{td}}=\sqrt{\frac{1}{4}\underset{i=1}{\overset{5}{\mathrm{\&Sigma;}}}{(X_i-{\stackrel{\&OverBar;}{X}}_i)}^2};$

D. calculate the coefficient of variation:

${\mathrm{CV}}_i(\%)=\frac{S_{\mathrm{td}}}{{\stackrel{\&OverBar;}{X}}_i}\&times;100\%;$

E. calculate i time point papermaking-method reconstituted tobaccos slurry uniformity coefficient:

U _i=100％-CV _i％；

3) calculate a slurrying batch papermaking-method reconstituted tobaccos slurry uniformity coefficient:

A. measure slurrying of reconstituted tobacco batch 1,2 ... T+2 time point online concentration and enriched water concentration 5 times; Calculate i time point online concentration N _ijwith enriched water concentration W _ijratio:

$X_i=\frac{N_{\mathrm{ij}}}{W_{\mathrm{ij}}};$

Wherein, i=1,2 ... T+2 is 1,2 of a slurrying batch ... one of T+2 time point; J=1,2 ... 5;

B. calculate the average of a slurrying batch online concentration and enriched water concentration ratio:

$\stackrel{\&OverBar;}{X}=\frac{1}{T+2}(\stackrel{\&OverBar;}{X_1}+\stackrel{\&OverBar;}{X_2}+\&CenterDot;\&CenterDot;\&CenterDot;+\stackrel{\&OverBar;}{X_{T+2}});$

C. calculate standard variance:

$S_{\mathrm{td}}=\sqrt{\frac{1}{5\&times;(T+2)-1}\underset{K=1}{\overset{5\&times;(T+2)}{\mathrm{\&Sigma;}}}{(X_k-\stackrel{\&OverBar;}{X})}^2};$

D. calculate the coefficient of variation:

$\mathrm{CV}(\%)=\frac{S_{\mathrm{td}}}{\stackrel{\&OverBar;}{X}}\&times;100\%;$

E. calculate a slurrying batch papermaking-method reconstituted tobaccos slurry uniformity coefficient:

U=100％-CV％；

According to the papermaking-method reconstituted tobaccos slurry uniformity coefficient of calculating, judge the papermaking-method reconstituted tobaccos homogeneity of a slurrying batch; Work as U _i>=90 (i=1,2....T+2), U>=90 o'clock, slurry meets reconstituted tobacco pulping requirements; Work as U _ione of them is less than at 90 o'clock (i=1,2...T+2), U, and this batch of slurry do not reach process quality requirement.