CN106360802A - Method for correcting beating degree of tobacco pulp in pulping process - Google Patents

Abstract

The invention relates to a method for correcting the beating degree of tobacco pulp in a pulping process. The method comprises the steps: weighing tobacco raw materials according to the formula of reconstituted tobacco raw materials in the pulping process of reconstituted tobacco pulp, and extracting in a constant-temperature water bath pot by using an aqueous solution for 30 minutes; pulping by a Wali beating machine method and measuring the beating degree by a GB/T 3332-2004 pulp beating degree measuring method and by using a Schober beating degree measuring instrument; measuring the fiber distribution of the pulp by a GB/T 2678.1-1993 paper pulp screening measuring method; establishing a working curve of the beating degree of the tobacco pulp and the 48-mesh passing fine fiber proportion x being more than or equal to 48 meshes, measuring the beating degree of the tobacco pulp DB dryness degree by a dryness degree coefficient method, measuring the fiber distribution of the spin-dried pulp by a paper pulp screening measuring method and measuring the 48-mesh passing fine fiber proportion x dryness degree being more than or equal to 48 meshes; calculating a beating degree correction value by a dryness degree coefficient method; and performing DB correction on the obtained beating degree correction, wherein due to the application of the DB correction, the qualification ratio of the reconstituted tobacco products is increased and the production cost of the reconstituted tobacco is reduced.

Description

A kind of modification method of tobacco slurry pulping process beating degree

Technical field

The invention belongs to reconstituted tobacco Technology field is and in particular to the repairing of a kind of tobacco slurry pulping process beating degree Correction method.

Background technology

Produce reality and literature survey result show, the detection of current papermaking-method reconstituted tobaccos stock quality is mainly using making The detection method of paper industry, to characterize the comprehensive quality of slurry with the testing result of beating degree and fiber wet weight.Existing document weight Point reports the factor based on computational science analyzing influence refining pulp quality, and stock quality optimal control correlational study works；In slurry Expect Indexs measure research aspect, Lai Yan is bright etc.^[13]Have studied with fs-200 fibre analyser to some paper making raw materials, homogeneous raw material The fibre length of different pulping process, rugosity be measured, and the analysis to measured value, Luo Bifeng etc.^[14]Have studied impact Beating degree measures the factor of accuracy.Literature research result show fiber beyond heteroproteose cell such as parenchyma cell, vessel cell Rupture also improves the beating degree of slurry to a certain extent, especially in heteroproteose cell content extra high tobacco raw material pulping process In, the impact to beating degree for the heteroproteose cell more so, leads to it representative poor with repeatability it is impossible to reflect the quality feelings of slurry comprehensively Condition is it is difficult to control the stability of slurry.

During mass dryness fraction Y-factor method Y is paper-making pulping, measure the method for simplifying of stock quality index, produce in reconstituted tobacco Result of practical application shows, same batch reconstituted tobacco chip base key physical index less stable, and mensure beating degree, fiber are wet The method of weight also needs to prove further, optimizes.Reconstituted tobacco production tobacco slurry has that stock quality fluctuation is big, fiber fines Loss and the unfixed problem of sampling amount, cause beating degree, the fluctuation of weight in wet base test result larger, and with a collection of product only produce Measure a mass dryness fraction coefficient, that is, in same batch products produce, all beating degree is carried out using same mass dryness fraction coefficient, fiber wet weight is surveyed Fixed, further increase beating degree, the inaccuracy of fiber wet weight mensure.Again correcting mass dryness fraction coefficient needs the minute of 3～4h, And produce upper mixing time about 40～50min, therefore to redefine mass dryness fraction coefficient infeasible for each order of classes or grades at school.Analysis reason is Tobacco slurry is made to have it unique, such as in slurry, fines content, dissolving polymer and colloidal substance (dcs) content are high, It is therefore desirable to setting up a kind of modification method of accurate stock quality index, the stock quality of application mass dryness fraction Y-factor method Y detection is referred to Mark is modified, to meet an urgent demand instructed reconstituted tobacco pulping process parameter optimization, improve reconstituted tobacco quality.

Content of the invention

The purpose of the present invention present invention is directed to current reconstituted tobacco production process and adopts mass dryness fraction Y-factor method Y to measure stock quality Index haves such problems as to exist that stock quality fluctuation is big, fiber fines loss and sampling amount are not fixed, and provides a kind of tobacco slurry Pulping process beating degree modification method.For optimizing reconstituted tobacco pulping process, instructing reconstituted tobacco pulping process technology and equipment Transformation, raising reconstituted tobacco quality, provide scientific basis.

The purpose of the present invention is achieved through the following technical solutions:

A kind of modification method of tobacco slurry pulping process beating degree, is carried out as follows:

(1) weigh tobacco material by reconstituted tobacco composition of raw materials, in thermostat water bath, use extraction with aqueous solution 30min, obtain Tobacco slurry；

(2) adopt Valley (valley) beater slurrying；Time be respectively 5,10,15,20,30min, obtain 5 parts of slurrying Sample；

(3) algoscopy of gb/t 3332-2004 slurry pulping degree and Xiao's Bai Shi beating degree analyzer is adopted to measure beating degree Db (Xiao Baier-Rui Gelefa)；

(4) adopt gb/t 2678.1-1993 paper pulp screening assay method to measure pulp fiber distribution, obtain the tiny fibre of 48 mesh Dimension accounting x_≥48mesh；

(5) make the above-mentioned tobacco slurry beating degree recording and by 48 mesh fiber fines accountings x_≥48meshWork bent Line, such as shown in formula (1)；

Db=kx_≥48mesh+b₀(1)

In formula:

The beating degree that db measures for National Standard Method, (unit ° sr)；

x_≥48meshIt is by 48 mesh fiber fines accounting (unit %)；b₀For working curve intercept, k is that working curve is oblique Rate；

(6) mass dryness fraction Y-factor method Y is adopted to measure tobacco slurry beating degree db mass dryness fraction；

(7) mass dryness fraction Y-factor method Y is adopted to measure x mass dryness fraction in tobacco slurry_≥48mesh；

(8) beating degree numerical value adopts equation below (2), formula (3) to be modified,

Db correction=db mass dryness fraction+δ db (2)

δ db=k (x_≥48mesh- x mass dryness fraction_≥48mesh) (3)

In formula:

δ db is beating degree correction value；

x_≥48mesh- x mass dryness fraction_≥48meshPass through the difference of 48 mesh fiber fines accountings for different detection methods, k is that working curve is oblique Rate.

Described mass dryness fraction Y-factor method Y is carried out as follows:

(1) with the clean container of a known weight, take representational slurry sample 200～300g, pour liner 80 mesh copper mesh into Centrifuge dehydration cup in.Start motor, be dehydrated 1min, take out slurry sample, weigh, repeat this step repeatedly, calculate wet pulp after dehydration Weighed average m₁.

(2) by dehydration after slurry in (105 ± 2) DEG C baking oven repeated drying, weigh, calculate dry after oven dry stock weight Meansigma methodss m₂.

(3) mass dryness fraction coefficient, is calculated by formula (4)

$g=\frac{m_2}{m_1}\mathrm{...}\left(4\right)$

In formula:

G is mass dryness fraction coefficient, is the conversion factor for simplifying on-line determination slurry concentration；

m₁It is the wet pulp quality arithmetic mean of instantaneous value after dehydration, unit: g；

m₂For the arithmetic mean of instantaneous value of the over dry stock quality after drying, unit: g.

The fibre analyser being adopted is using Bauer fibre classifier (bauer mcnett).

It is an advantage of the current invention that:

(1) reconstructed tobacco leaf slurry quality index and tobacco slurry fiber distribution relation are established, by measuring different slurries The tobacco slurry fiber distribution of method for measurement of concentration, the beating degree that tobacco slurry pulping process mass dryness fraction Y-factor method Y can be measured is entered Row is revised, and then instructs optimization reconstituted tobacco pulping process, reconstituted tobacco pulping process technology and equipment renovation, improves product matter Amount.

(2) it is to improve papermaking-method reconstituted tobaccos production Technology level to provide a kind of new technological means.

(3) it is modified by the beating degree that the present invention measures to tobacco slurry pulping process mass dryness fraction Y-factor method Y, improve Reconstructed tobacco leaf slurry quality index accuracy of detection, controls reconstructed tobacco leaf slurry quality, reconstituted tobacco piece using beating degree after revising Base key physical index (thickness, tightness, machine direction tensile strength, cross direction tensile strength and spreading rate and reconstructed tobacco leaf slurry quality Index correlation coefficient r²It has been respectively increased 150%, 140%, 75%, 75%, more than 80%, and then improved reconstituted tobacco product Qualification rate, reduces the production cost of reconstituted tobacco.

Brief description

Fig. 1 is for beating degree and by 48 mesh fiber fines accountings x_≥48meshWorking curve diagram.

Fig. 2 is the pulping process flow figure of embodiment 1.

Fig. 3 measures the process chart of tobacco slurry beating degree db mass dryness fraction for mass dryness fraction Y-factor method Y.

Specific embodiment

With reference to specific embodiment, the present invention will be further described.

It will be understood to those of skill in the art that the following example is merely to illustrate the present invention, and should not be regarded as limiting this Bright scope.Unreceipted particular technique or condition person in embodiment, according to the technology described by document in the art or condition Or carry out according to product description.Agents useful for same or the unreceipted production firm person of instrument, are and can pass through what purchase obtain Conventional products.

Embodiment 1:

(1) weigh tobacco material by reconstituted tobacco composition of raw materials, in thermostat water bath, use extraction with aqueous solution 30min, obtain Tobacco slurry；

(2) adopt Valley (vally) beating method slurrying；Time be respectively 5,10,15,20,30min, obtain 5 parts of slurrying samples Product；

(3) algoscopy of gb/t 3332-2004 slurry pulping degree and Xiao's Bai Shi beating degree analyzer is adopted to measure beating degree Db (Xiao Baier-Rui Gelefa) the results are shown in Table 1；

(4) adopt gb/t 2678.1-1993 paper pulp screening assay method to measure pulp fiber distribution, obtain the tiny fibre of 48 mesh Dimension accounting x_≥48mesh, the results are shown in Table 1；

Table 1 National Standard Method measures beating degree db

(5) tobacco slurry beating degree is made and by 48 mesh fiber fines accountings x according to table 1_≥48meshWorking curve, such as Shown in Fig. 1, by unitary once linear return obtain beating degree with linear by 48 mesh fiber fines accounting x (>=48mesh) Regression equation such as formula (1),；

Db=0.1478x_≥48mesh+4.8209 (1)

In formula:

The beating degree that db measures for National Standard Method, unit ° sr；

x_≥48meshIt is by 48 mesh fiber fines accountings, unit (%)；4.8209 being working curve intercept b₀, 0.1478 is Slope of curve k；

(6) mass dryness fraction Y-factor method Y is adopted to measure tobacco slurry beating degree db mass dryness fraction；

(7) mass dryness fraction Y-factor method Y is adopted to measure x mass dryness fraction in tobacco slurry_≥48mesh；

(8) in actual production, beating degree numerical value adopts equation below (2), formula (3) to be modified,

δ db correction=db mass dryness fraction+δ db (2)

δ db=k (x_≥48mesh- x mass dryness fraction_≥48mesh) (3)

In formula:

δ db is beating degree correction value；

x_≥48mesh- x mass dryness fraction_≥48meshPass through the difference of 48 mesh fiber fines accountings for different detection methods, k is the slope of curve.

Step (6)～(8) result is respectively as table 1, table 2.

Table 1 National Standard Method and mass dryness fraction Y-factor method Y beating degree measurement result

Table 2 beating degree db correction value

* note: sample 1-1, sample 1-2 are the Duplicate Samples of sample 1.

(9) reconstructed tobacco leaf slurry quality is controlled using beating degree after revising, measure reconstituted tobacco chip base key physical quality Index (thickness, tightness, machine direction tensile strength, cross direction tensile strength and spreading rate), before spss comparison analysis corrections The dependency of beating degree and each key physical index after beating degree and correction, analysis result is shown in Table 3.

Beating degree correlation analysiss before and after table 3 reconstituted tobacco chip base key physical index and correction

From table 3 it can be seen that before revising beating degree with revise after beating degree and chip base thickness, chip base tightness, longitudinal anti-tensile The relative coefficient r2 of intensity, cross direction tensile strength and spreading rate is respectively as follows: -0.425,0.573, -0.039, -0.058, - 0.499, it has been respectively increased 152%, 140%, 77%, 75%, more than 80% it can be seen that beating degree and chip base thickness after revising Degree, chip base tightness, the dependency of machine direction tensile strength, cross direction tensile strength and spreading rate are higher than beating degree before correction.

From above analytic explanation, to mass dryness fraction Y-factor method Y, revised beating degree is with the dependency of each chip base key physical index It is greatly improved, this also illustrates that the revised beating degree of mass dryness fraction Y-factor method Y more can accurately characterize stock quality.

Mass dryness fraction Y-factor method Y is carried out as follows:

(1) with the clean container of a known weight, take representational slurry sample 200～300g, pour liner 80 mesh copper mesh into Centrifuge dehydration cup in.Start motor, be dehydrated 1min, take out slurry sample, weigh, repeat this step repeatedly, calculate wet pulp after dehydration Weighed average m₁.

(2) by dehydration after slurry in (105 ± 2) DEG C baking oven repeated drying, weigh, calculate dry after oven dry stock weight Meansigma methodss m₂.

(3) mass dryness fraction coefficient, is calculated by formula (4)

$g=\frac{m_2}{m_1}\mathrm{...}\left(4\right)$

In formula:

G is mass dryness fraction coefficient, is the conversion factor for simplifying on-line determination slurry concentration；

m₁It is the wet pulp quality arithmetic mean of instantaneous value after dehydration, unit: g；

m₂For the arithmetic mean of instantaneous value of the over dry stock quality after drying, unit: g.

Mass dryness fraction Y-factor method Y measures beating degree result such as table 4.

Table 4 mass dryness fraction Y-factor method Y measures beating degree

Ultimate principle, principal character and the advantages of the present invention of the present invention have been shown and described above.The technology of the industry , it should be appreciated that the present invention is not restricted to the described embodiments, the simply explanation described in above-described embodiment and description is originally for personnel The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these changes Change and improvement both falls within scope of the claimed invention.Claimed scope by appending claims and its Equivalent thereof.

Claims (3)

1. a kind of modification method of tobacco slurry pulping process beating degree it is characterised in that: carry out as follows:

(1) weigh tobacco material by reconstituted tobacco composition of raw materials, in thermostat water bath, use extraction with aqueous solution 30min, obtain Nicotiana tabacum L. Slurry；

(2) adopt Valley (valley) beater slurrying；Time be respectively 5,10,15,20,30min, obtain 5 parts of slurrying samples；

(3) algoscopy of gb/t 3332-2004 slurry pulping degree and Xiao's Bai Shi beating degree analyzer is adopted to measure beating degree db；

(4) adopt gb/t 2678.1-1993 paper pulp screening assay method to measure pulp fiber distribution, obtain 48 mesh fiber fines and account for Than；

(5) make the above-mentioned tobacco slurry beating degree recording and by 48 mesh fiber fines accountingsWorking curve, such as Shown in formula (1)；

(1)

In formula:

The beating degree that db measures for National Standard Method, unit ° sr；

It is by 48 mesh fiber fines accountings, unit %；For working curve intercept, k is working curve slope；

(6) mass dryness fraction Y-factor method Y is adopted to measure tobacco slurry beating degree；

(7) mass dryness fraction Y-factor method Y is adopted to measure in tobacco slurry；

(8) beating degree numerical value adopts equation below (2), formula (3) to be modified,

(2)

(3)

In formula:

For beating degree correction value；

Pass through the difference of 48 mesh fiber fines accountings for different detection methods, k is that working curve is oblique Rate.

2. tobacco slurry pulping process beating degree according to claim 1 modification method it is characterised in that: described dry Degree Y-factor method Y is carried out as follows:

(1) with the clean container of a known weight, take representational slurry sample 200～300g, pour into liner 80 mesh copper mesh from In heart dehydration cup；

Start motor, be dehydrated 1min, take out slurry sample, weigh, repeat this step repeatedly, calculate the weighed average of wet pulp after dehydration m₁；

(2) by the slurry after dehydration in 105 ± 2 DEG C of baking ovens repeated drying, weigh, calculate the flat of oven dry stock weight after drying Average m₂；

(3) mass dryness fraction coefficient, is calculated by formula (4)

... ... ... ... ... ... (4)

In formula:

G is mass dryness fraction coefficient, is the conversion factor for simplifying on-line determination slurry concentration；

m₁It is the wet pulp quality arithmetic mean of instantaneous value after dehydration, unit: g；

m₂For the arithmetic mean of instantaneous value of the over dry stock quality after drying, unit: g.

3. the modification method of tobacco slurry pulping process beating degree according to claim 1 is it is characterised in that adopted Fibre analyser is using Bauer fibre classifier bauer mcnett.