CN103590279B - Online interpolation calcium carbonate suspension reduces the method for the air permeance for cigarette paper coefficient of variation - Google Patents
Online interpolation calcium carbonate suspension reduces the method for the air permeance for cigarette paper coefficient of variation Download PDFInfo
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- CN103590279B CN103590279B CN201310611152.0A CN201310611152A CN103590279B CN 103590279 B CN103590279 B CN 103590279B CN 201310611152 A CN201310611152 A CN 201310611152A CN 103590279 B CN103590279 B CN 103590279B
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Abstract
The invention provides a kind of method that online interpolation calcium carbonate suspension reduces the air permeance for cigarette paper coefficient of variation, it is characterized in that, concrete steps are: calcium carbonate and dilution water are mixed with calcium carbonate suspension; Calcium carbonate suspension is entered diluting water device of pulp flowing case via calcium carbonate suspension house steward and calcium carbonate suspension arm and dilution water is mixed to get calcium carbonate suspension dilution, described calcium carbonate suspension arm is provided with calcium carbonate suspension control valve, according to the on-line determination result of the paper permeability coefficient of variation, regulate the aperture of calcium carbonate suspension control valve, automatically adjustment calcium carbonate suspension addition; Calcium carbonate suspension dilution is entered turbulent flow generator together with slurry, manufactures paper with pulp finally by the whitewashing online of lip district, obtain cigarette paper.The present invention can not cause cigarette paper whiteness, intensity, quantitatively and the reduction of opacity, can realize being uniformly distributed of cigarette paper banner calcium carbonate concentration, reduce the air permeance for cigarette paper coefficient of variation.
Description
Technical field
The present invention relates to cigarette paper manufacturing technology field, particularly a kind of online interpolation calcium carbonate suspension reduces the method for the air permeance for cigarette paper coefficient of variation.
Background technology
At present, the air permeability coefficient of variation is one of important indicator of cigarette paper, the A level air permeance for cigarette paper coefficient of variation≤8% is required in standard GB/T/T12655-2007, domestic high-grade cigarette paper coefficient of variation major stable is 6.5%, external then control below 4%, domestic exist certain gap in the air permeance for cigarette paper coefficient of variation Yu abroad.The method of the domestic reduction air permeance for cigarette paper coefficient of variation is mainly considered from aspects such as raw material, making beating, paper machine, auxiliary material auxiliary agent and production process water quality.In cigarette paper finished product, PCC content is 25% ~ 30%, accounts for 1/4 of cigarette paper weight, and crystalline form, dispersiveness, pH value, particle size distribution range etc. are to air permeability important.Cigarette paper PCC addition manner in process of production for adding in slurry, mode single fixing, CONCENTRATION DISTRIBUTION is uneven, retention is not high, produce cigarette paper and there is the problems such as the lower and coefficient of variation of air permeability is large.
Summary of the invention
A kind of online interpolation calcium carbonate suspension is the object of the present invention is to provide to reduce the method for the air permeance for cigarette paper coefficient of variation, the method can realize on the basis not changing the special PCC amount of cigarette paper, by part PCC is mixed with PCC suspension at calcium carbonate preparation unit, then add PCC suspension online via diluting water device of pulp flowing case, change the PCC content of head box banner local, thus realize the homogeneous of croos profile PCC content, efficiently avoid the impact that the skewness etc. of PCC in paper pulp brings air permeance for cigarette paper and the coefficient of variation.
In order to achieve the above object, the invention provides a kind of method that online interpolation calcium carbonate suspension reduces the air permeance for cigarette paper coefficient of variation, it is characterized in that, concrete steps are:
The first step: calcium carbonate and dilution water are mixed with calcium carbonate suspension;
Second step: calcium carbonate suspension is entered diluting water device of pulp flowing case via calcium carbonate suspension house steward and calcium carbonate suspension arm successively and dilution water is mixed to get calcium carbonate suspension dilution, described calcium carbonate suspension arm is provided with calcium carbonate suspension control valve, according to the on-line determination result of the paper permeability coefficient of variation, regulate the aperture of calcium carbonate suspension control valve;
3rd step: calcium carbonate suspension dilution is added turbulent flow generator together with slurry, manufactures paper with pulp finally by the whitewashing online of lip district, obtains cigarette paper.
Preferably, to be single grain the be spindle-like crystal of 0.5 ~ 1.0 μm of the calcium carbonate in the described first step, forms the precipitated calcium carbonate (PCC) that central diameter is the rose-shaped spheroid of 1 ~ 3 μm.
Preferably, the dilution water in the described first step and second step to be concentration be 0.1% ~ 0.18% the rare plain boiled water of circulation or clear water.
Preferably, the mass fraction of the calcium carbonate suspension in the described first step is 4% ~ 8%, and settling volume is 0 ~ 2.2ml/g.
Preferably, suspension preparation unit is adopted to prepare calcium carbonate suspension in the described first step, described suspension preparation unit comprises agitator tank, surge tank and holding vessel, the bottom of agitator tank is connected to surge tank sidewall upper by pipeline, surge tank middle and upper part is connected to bottom holding vessel by sudden expansion contracted channel, the top of holding vessel is connected by another runner with surge tank top, the holding vessel that calcium carbonate suspension house steward one end and calcium carbonate suspension prepare unit is connected, and the other end is connected with calcium carbonate suspension arm; Calcium carbonate suspension arm is connected with diluting water device of pulp flowing case.
More preferably, the connection angle that described calcium carbonate suspension arm is connected with diluting water device of pulp flowing case is 0 ~ 90 degree.
Preferably, described calcium carbonate suspension control valve is connected with stepper motor, stepper motor is connected with the control system of paper machine, according to the on-line determination result of the paper permeability coefficient of variation, the aperture of calcium carbonate suspension control valve is controlled by the computer in control system for paper machine, automatic adjustment calcium carbonate suspension addition, makes air permeability in standard value range.
Preferably, in described 3rd step, also comprise the on-line determination result according to the paper permeability coefficient of variation, regulate the flow rate ratio of calcium carbonate suspension dilution and slurry, make air permeability in standard value range.
A kind of online interpolation calcium carbonate suspension of the present invention reduces the method for the air permeance for cigarette paper coefficient of variation, its operation principle is: calcium carbonate suspension is added online by diluting water device of pulp flowing case, according to the air permeance for cigarette paper coefficient of variation result of control system for paper machine on-line determination, the aperture of calcium carbonate suspension control valve is controlled by computer, control the flow of calcium carbonate suspension, change the PCC content of head box banner local, realize the homogenization of croos profile PCC content, thus efficiently avoid the problems such as the skewness of PCC in paper pulp, reduce the coefficient of variation of air permeance for cigarette paper.
Compared with prior art, the invention has the beneficial effects as follows:
1, because the preparation of calcium carbonate suspension and addition are controlled by computer completely, therefore large, the operation of modification scope of the present invention accurately, control sensitive, the air permeability coefficient of variation can be made on existing basis to reduce about 2.5%.
2, because calcium carbonate suspension adds via diluting water device of pulp flowing case, what avoid calcium carbonate suspension is added in the change in concentration caused in head box balance cylinder, change the PCC content of head box banner local, achieve the homogeneous distribution of croos profile PCC content, reduce the air permeance for cigarette paper coefficient of variation.
3, the present invention is applicable to the transformation of existing head box, and be applicable to new head box again, do not need to carry out large transformation to head box, processing and fabricating is simple, and equipment cost is lower.
Accompanying drawing explanation
Fig. 1 is suspension preparation of the present invention and distributor schematic diagram.
Detailed description of the invention
For making the present invention become apparent, hereby with preferred embodiment, be described in detail below.Precipitated calcium carbonate in embodiment is purchased from Jiande City Tianshi Calcium Carbonate Limited Liability Company.
Embodiment
A kind of online interpolation calcium carbonate suspension reduces the method for the air permeance for cigarette paper coefficient of variation, adopt known in the industry diluting water device of pulp flowing case, turbulent flow generator and lip district, coordinate suspension preparation unit of the present invention, calcium carbonate suspension house steward and calcium carbonate suspension arm to use.As shown in Figure 1, for suspension preparation of the present invention and distributor schematic diagram, described suspension preparation and distributor comprise suspension preparation unit, described suspension preparation unit comprises agitator tank a, surge tank b and holding vessel c, the bottom of agitator tank a is connected to surge tank b sidewall upper by pipeline, surge tank b middle and upper part is connected to bottom holding vessel c by sudden expansion contracted channel, described sudden expansion contracted channel comprises pipeline body and is successively arranged in the wing shape baffle plate in pipeline body, the top of holding vessel c is connected by another runner with surge tank b top, agitator tank a, surge tank b volume is equally large, holding vessel c volume is surge tank b volume half and is always full of calcium carbonate suspension.Precipitated calcium carbonate and dilution water mix in agitator tank, and three jars exist difference in height, and calcium carbonate suspension can only be flowed under gravity successively; Sudden expansion contracted channel makes calcium carbonate suspension keep higher turbulence state always.According to the flow direction of calcium carbonate suspension, the middle and upper part that calcium carbonate suspension house steward 2 one end and calcium carbonate suspension prepare the holding vessel c of unit is connected, and the other end is connected with calcium carbonate suspension arm 3; Do not meet sedimentation degree in calcium carbonate suspension house steward 2 and overflow calcium carbonate suspension in running and enter bottom holding vessel c through being pumped to sudden expansion contracted channel, form the circulation of forced refluence, make the calcium carbonate suspension added online can meet settling volume all the time and remain on requirement within the scope of 0 ~ 2.2ml/g.Calcium carbonate suspension arm 3 one end connects calcium carbonate suspension house steward 2, and the other end is connected with diluting water device of pulp flowing case, and connection angle is 0 ~ 90 degree.Calcium carbonate suspension arm 3 is provided with calcium carbonate suspension control valve 4, calcium carbonate suspension control valve 4 is connected with stepper motor, stepper motor is connected with the control system of paper machine, according to the on-line determination result of the paper permeability coefficient of variation, the aperture of calcium carbonate suspension control valve is controlled by the computer in control system for paper machine, automatic adjustment calcium carbonate suspension addition, makes air permeability in standard value range.
The concrete steps that described interpolation calcium carbonate suspension reduces the method for the air permeance for cigarette paper coefficient of variation are:
(1) single grain be the spindle-like crystal of 0.5 ~ 1.0 μm, central diameter is that precipitated calcium carbonate (PCC) 60kg of the rose-shaped spheroid of 1 ~ 3 μm and dilution water 940L make calcium carbonate suspension at suspension preparation unit; The mass fraction of calcium carbonate suspension is 6%, and settling volume is 1.1ml/g.Dilution water is clear water.
(2) calcium carbonate suspension is entered diluting water device of pulp flowing case from suspension preparation unit via calcium carbonate suspension house steward 2 and calcium carbonate suspension arm 3 and clear water is mixed to get the calcium carbonate suspension dilution that calcium carbonate concentration is 5%, control system for paper machine is according to the online scanning result of the paper permeability coefficient of variation, when paper horizontal somewhere air permeability deviate from standard value, the aperture of the calcium carbonate suspension arm control valve 4 that the slurry pipe that in the tube bank of automatic adjustment cloth slurry, lip district is corresponding therewith communicates, automatic adjustment calcium carbonate suspension addition, when air permeability is higher, reduce the aperture of calcium carbonate suspension arm control valve 4, otherwise, increase the aperture of calcium carbonate suspension arm control valve 4.
(3) according to the online scanning result of control system for paper machine according to the paper permeability coefficient of variation, when paper horizontal somewhere air permeability deviate from standard value, regulate the flow rate ratio of calcium carbonate suspension dilution and slurry in the slurry pipe that lip district is corresponding therewith, when air permeability is higher, reduce the flow rate ratio of calcium carbonate suspension dilution and slurry in the slurry pipe that lip district is corresponding therewith, otherwise, increase the flow rate ratio of calcium carbonate suspension dilution and slurry in the slurry pipe that lip district is corresponding therewith, calcium carbonate suspension dilution is entered turbulent flow generator together with slurry, manufacture paper with pulp finally by the whitewashing online of lip district, obtain cigarette paper, the air permeance for cigarette paper coefficient of variation of gained is 5.2%.The air permeance for cigarette paper coefficient of variation of traditional handicraft is 7.8%.
The present invention is according to the air permeance for cigarette paper coefficient of variation of control system for paper machine on-line determination, the aperture of calcium carbonate suspension control valve 4 is controlled by computer, the calcium carbonate suspension prepared by suspension preparation unit via calcium carbonate suspension house steward 2, calcium carbonate suspension arm 3, be transported to diluting water device of pulp flowing case and mix with dilution water, calcium carbonate suspension dilution enters turbulent flow generator together with slurry, fully mix in turbulent flow generator, through the whitewashing online of lip district.According to the control system of paper machine to the on-line determination result of the paper permeability coefficient of variation, controlled the aperture of calcium carbonate suspension control valve 4 by computer, control the addition of calcium carbonate suspension, first mix with dilution water, mix with slurry fully together then; Make head box horizontal each point calcium carbonate suspension concentration adjusted, change the PCC content of head box banner local, realize the homogeneous of croos profile PCC content, reach the object reducing the air permeance for cigarette paper coefficient of variation.
Claims (7)
1. an online method of adding the calcium carbonate suspension reduction air permeance for cigarette paper coefficient of variation, it is characterized in that, concrete steps are:
The first step: adopt suspension preparation unit that calcium carbonate and dilution water are mixed with calcium carbonate suspension, described suspension preparation unit comprises agitator tank (a), surge tank (b) and holding vessel (c), the bottom of agitator tank (a) is connected to surge tank (b) sidewall upper by pipeline, surge tank (b) middle and upper part is connected to holding vessel (c) bottom by sudden expansion contracted channel, described sudden expansion contracted channel comprises pipeline body and is successively arranged in the wing shape baffle plate in pipeline body, the top of holding vessel (c) is connected by another runner with surge tank (b) top, holding vessel (c) is always full of calcium carbonate suspension, the mixing in agitator tank (a) of precipitated calcium carbonate and dilution water, sudden expansion contracted channel makes calcium carbonate suspension keep turbulence state always, according to the flow direction of calcium carbonate suspension, the middle and upper part that calcium carbonate suspension house steward (2) one end and calcium carbonate suspension prepare the holding vessel (c) of unit is connected, the other end is connected with calcium carbonate suspension arm (3), calcium carbonate suspension arm (3) is connected with diluting water device of pulp flowing case, do not meet sedimentation degree in calcium carbonate suspension house steward (2) and in running, overflow calcium carbonate suspension and enter from holding vessel (c) bottom through being pumped to sudden expansion contracted channel, form the circulation of forced refluence, make the calcium carbonate suspension added online can meet settling volume all the time and remain on requirement within the scope of 0 ~ 2.2ml/g,
Second step: by calcium carbonate suspension successively via calcium carbonate suspension house steward (2) and calcium carbonate suspension arm (3) enters diluting water device of pulp flowing case and dilution water is mixed to get calcium carbonate suspension dilution, described calcium carbonate suspension arm (3) is provided with calcium carbonate suspension control valve (4), according to the on-line determination result of the paper permeability coefficient of variation, regulate the aperture of calcium carbonate suspension control valve (4);
3rd step: calcium carbonate suspension dilution is added turbulent flow generator together with slurry, manufactures paper with pulp finally by the whitewashing online of lip district, obtains cigarette paper.
2. online method of adding the calcium carbonate suspension reduction air permeance for cigarette paper coefficient of variation as claimed in claim 1, it is characterized in that, calcium carbonate in the described first step to be single grain the be spindle-like crystal of 0.5 ~ 1.0 μm, forms the precipitated calcium carbonate that central diameter is the rose-shaped spheroid of 1 ~ 3 μm.
3. as claimed in claim 1 online add the method that calcium carbonate suspension reduces the air permeance for cigarette paper coefficient of variation, it is characterized in that, the dilution water in the described first step and second step to be concentration be 0.1% ~ 0.18% the rare plain boiled water of circulation or clear water.
4. online method of adding the calcium carbonate suspension reduction air permeance for cigarette paper coefficient of variation as claimed in claim 1, it is characterized in that, the mass fraction of the calcium carbonate suspension in the described first step is 4% ~ 8%.
5. online method of adding the calcium carbonate suspension reduction air permeance for cigarette paper coefficient of variation as claimed in claim 1, it is characterized in that, described calcium carbonate suspension arm (3) is 0 ~ 90 degree with the connection angle of diluting water device of pulp flowing case.
6. online method of adding the calcium carbonate suspension reduction air permeance for cigarette paper coefficient of variation as claimed in claim 1, it is characterized in that, described calcium carbonate suspension control valve (4) is connected with stepper motor, stepper motor is connected with the control system of paper machine, according to the on-line determination result of the paper permeability coefficient of variation, controlled the aperture of calcium carbonate suspension control valve by the computer in control system for paper machine, adjustment calcium carbonate suspension addition, makes air permeability in standard value range automatically.
7. online method of adding the calcium carbonate suspension reduction air permeance for cigarette paper coefficient of variation as claimed in claim 1, it is characterized in that, the on-line determination result according to the paper permeability coefficient of variation is also comprised in described 3rd step, regulate the flow rate ratio of calcium carbonate suspension dilution and slurry, make air permeability in standard value range.
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| CN201310611152.0A CN103590279B (en) | 2013-11-26 | 2013-11-26 | Online interpolation calcium carbonate suspension reduces the method for the air permeance for cigarette paper coefficient of variation |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101012629A (en) * | 2006-05-31 | 2007-08-08 | 华南理工大学 | Diluting water adding device of head box |
| CN102108651A (en) * | 2010-12-16 | 2011-06-29 | 绵阳同成高科技股份有限公司 | Intelligent control device for quantitative dilution water for paper banners |
| CN202766908U (en) * | 2012-09-24 | 2013-03-06 | 甘木林 | Headbox dilution water adding device |
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- 2013-11-26 CN CN201310611152.0A patent/CN103590279B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101012629A (en) * | 2006-05-31 | 2007-08-08 | 华南理工大学 | Diluting water adding device of head box |
| CN102108651A (en) * | 2010-12-16 | 2011-06-29 | 绵阳同成高科技股份有限公司 | Intelligent control device for quantitative dilution water for paper banners |
| CN202766908U (en) * | 2012-09-24 | 2013-03-06 | 甘木林 | Headbox dilution water adding device |
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