CN105088849A - Method for improving paper strength and papermaking pulp - Google Patents
Method for improving paper strength and papermaking pulp Download PDFInfo
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- CN105088849A CN105088849A CN201510452858.6A CN201510452858A CN105088849A CN 105088849 A CN105088849 A CN 105088849A CN 201510452858 A CN201510452858 A CN 201510452858A CN 105088849 A CN105088849 A CN 105088849A
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- slurry
- defibrination
- pulp
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
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Abstract
The invention discloses a method for improving paper strength and papermaking pulp. The method for improving paper strength includes the steps that broad leaf wood pulp is provided, the broad leaf wood pulp is ground through a short pulp grinding line, at least two pulp grinders connected in series are arranged in the short pulp grinding line, the length of each circle of cross teeth of cutter heads of the pulp grinders is selected from small to large in the pulp moving direction, the pulp concentration of an inlet of the first pulp grinder is controlled to range from 3.0% to 6.0%, and the pulp ground by the short pulp grinding line is used for paper making. In this way, the content of fine fibers of the ground pulp can be controlled within a reasonable range so that good pulp performance can be acquired, and the forming quality of wet paper webs is improved.
Description
Technical field
The present invention relates to field of papermaking, be specifically related to a kind of method, the paper making pulp that improve paper strength.
Background technology
Along with the high speed development of paper industry, the appearance of the large fabric width foudrinier of the especially high speed of a motor vehicle, its distinguishing feature is that output is large especially, having higher requirement for slurry production capacity and defibrination quality to refining system, especially grind the runnability etc. that disposed slurry quality directly affects follow-up one-tenth paper product matter and board, the common saying " very papermaking, seven points of making beating " of paper industry is exactly the high level overview to defibrination importance.Traditional defibrination control method is mainly realized by Canadian freeness (or beating degree) index controlling mill disposed slurry, its drawback is mainly reflected in only can analyze its defibrination degree be subject to from the macroscopic perspective of pulp fiber, lack the micro-analysis to pulp fiber inside and control, be mainly reflected in the change aspect of the fines content of mill disposed slurry.
The development of defibrination technology has been transitioned into the disc mill Replacement of Series Connection Refining of continuous high-efficient of today by initial batch (-type) separate unit defibrination, occupy the mainly double plate mill fiberizer of paper industry main flow at present, the features such as it is energy-efficient, floor space is little are accepted extensively by paper industry client.How reasonably to control defibrination and vital effect is played to follow-up pulp quality, paper strength is played a multiplier effect.
Summary of the invention
The technical problem that the present invention mainly solves how to improve paper strength.
In view of this, the embodiment of the present invention provides a kind of method improving paper strength, and the fines content that can control to grind disposed slurry controls at reasonable interval, to obtain good size performance, improves the Forming Quality of wet web.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of method improving paper strength, described method comprises: provide hardwood pulp, adopts short slurry defibrination line to carry out defibrination to described hardwood pulp; Be provided with at least two fiberizers be arranged in series in described short slurry defibrination line, along the trend of slurry, each fiberizer cutterhead often encloses intersection tine length and selects according to ascending principle; The slurry concentration controlling First refiner inlet is 3.0 ~ 6.0%, and the slurry after too short slurry defibrination line defibrination is used for paper making.
Wherein, described First fiberizer cutterhead often enclose intersect tine length be 90 ~ 110km.rev, after fiberizer cutterhead often enclose intersect tine length be 140 ~ 160km.rev.
Wherein, three fiberizers be arranged in series are provided with in described short slurry defibrination line.
Wherein, described method also comprises: along the trend of slurry, and the power averaging of each fiberizer distributes or sets according to the defibrination power division mode that weight is light.
Wherein, along the trend of slurry, the power ratio of each fiberizer is 25:50:25.
Wherein, described slurry fines content after too short slurry defibrination line defibrination is 20% ~ 27%.
Wherein, described slurry fines content after too short slurry defibrination line defibrination is 20% ~ 22%.
Wherein, described hardwood pulp is at least one in Eucalyptus class, Acacia class, birch class, poplar class and weedtree class.
Wherein, the slurry concentration of described First refiner inlet is 4.5 ~ 5.5%.
For solving the problems of the technologies described above, another technical solution used in the present invention is: provide a kind of paper making pulp, and described paper making pulp comprises the slurry that said method prepares.
The invention has the beneficial effects as follows: the situation being different from prior art, the invention provides hardwood pulp, short slurry defibrination line is adopted to carry out defibrination to described hardwood pulp, at least two fiberizers be arranged in series are had in short slurry defibrination line, along the trend of slurry, each fiberizer cutterhead often encloses intersection tine length and selects according to ascending principle, and the slurry concentration controlling First refiner inlet is 3.0 ~ 6.0%, and the slurry after too short slurry defibrination line defibrination is used for paper making.The present invention is maintaining under the defibrination production capacity prerequisite suitable with energy consumption, by using the optimum organization of slurry concentration and fiberizer dish tooth, the fines content of mill disposed slurry is controlled at reasonable interval, efficient solution never rationally defibrination process control and drainage access issues between a large amount of fiber fines blocking pulp fibers of producing, the slurry that the method defibrination obtains is used for papermaking, paper strength can greatly be improved, be conducive to the fast dewatering of paper machine dewatering device simultaneously, improve the Forming Quality of wet web, effectively weaken wet web by the conquassation loss after press section of a paper machine, be beneficial to the trouble-free operation of paper machine.
Accompanying drawing explanation
Fig. 1 is a kind of flow chart improving the method for paper strength that the embodiment of the present invention provides.
Detailed description of the invention
Refer to Fig. 1, Fig. 1 is a kind of flow chart improving the method for paper strength that the embodiment of the present invention provides, and the method for the raising paper strength of the present embodiment comprises the following steps:
S101: provide hardwood pulp, adopts short slurry defibrination line to carry out defibrination to hardwood pulp.
Wherein, hardwood pulp is leaf wood bleach chemical pulp, and the leaf wood bleach chemical pulp in the embodiment of the present invention can be any one or more than one the mixture in Eucalyptus class, Acacia class, birch class, poplar class and weedtree class.By short slurry defibrination line, defibrination is carried out to hardwood pulp.So-called short slurry defibrination line refers to the technique of by two or more fiberizer of connecting, fluff pulp being carried out to defibrination.
S102: be provided with at least two fiberizers be arranged in series in short slurry defibrination line, along the trend of slurry, each fiberizer cutterhead often encloses intersection tine length and selects according to ascending principle.
In embodiments of the present invention, be provided with at least two fiberizers be arranged in series in short slurry defibrination line, and along the trend of defibrination, each fiberizer often encloses and intersects tine length and select according to ascending principle.Often enclose that to intersect tine length less by controlling First fiberizer cutterhead, can make like this slurry dish between cog quickly through, guaranteed flow pressure, roughly grinds hardwood pulp.And the fiberizer cutterhead after First often encloses and intersects all large than First of tine length, by selecting often circle to intersect the larger defibrination dish tooth of tine length, the slurry after corase grind can be made like this to increase in the dish between cog time of staying, fine grinding is carried out to slurry.
Wherein, as the preferred scheme of one, it is 90 ~ 110km.rev that First fiberizer cutterhead often encloses intersection tine length, such as 90,92,95,100,102,105,108km.rev etc., be more preferably 95 ~ 105km.rev, such as 95,96,98,100,103,104,105 etc., most preferably be 100km.rev.It is 140 ~ 160km.rev that fiberizer cutterhead after First fiberizer often encloses intersection tine length, such as 140,142,145,148,150,153,155,158,160km.rev etc., be preferably 145 ~ 155km.rev, such as 146,147,150,152,155 etc., most preferably be 150km.rev.
Wherein, as the preferred implementation of one, in short slurry defibrination line, be provided with three fiberizers be arranged in series.Defibrination cost can be controlled like this, defibrination requirement can be met again.
S103: the slurry concentration controlling First refiner inlet is 3.0 ~ 6.0%, the slurry after too short slurry defibrination line defibrination is used for paper making.
In defibrination process, the slurry concentration controlling First refiner inlet is 3.0 ~ 6.0%, such as 3%, 3.5%, 4%, 4.5%, 5%, 5.2%, 5.5%, 5.8%, 6% etc., be preferably 4.5 ~ 5.5%, such as 4.8%, 5.0%, 5.3% etc., most preferably be 5%.The supply that First refiner inlet slurry is continual and steady and refining effect can be guaranteed simultaneously.If concentration is too low, refining effect is bad, excessive concentration, the bad control of fiberizer dish tooth, and after defibrination, pumping energy well cannot realize slurry transport.
Wherein, as the preferred implementation of one of the present invention, the defibrination power optimization further combined with short fiber defibrination line promotes size performance further.
In a kind of possible implementation, along the trend of slurry in the embodiment of the present invention, the power averaging of each fiberizer distributes.
As the preferred implementation of one, the short slurry defibrination line of the embodiment of the present invention adopts three fiberizers of connecting, and power division sets according to the defibrination power division mode that weight is light.The power ratio of such as three fiberizers is 20 ~ 30:40 ~ 60:20 ~ 30.Such as power can be 20:60:20, or 25:40:35 etc.Preferred, the power ratio of three fiberizers is 25:50:25.So can reduce fibre cutting, allow flexibility after fibrous absorbent swollen increase, its fiber brooming better effects if, between fiber, specific area increases adhesion and strengthens, thus makes the lifting of paper strength higher.
The present invention is measured the slurry fines content after defibrination by fiber quality analyzer (being called for short FQA).Finding after measured, is 20% ~ 27% by the slurry fines content after said method defibrination, and by the further optimum organization of technique, can control defibrination Europe slurry fines content is 20% ~ 22%.Can be good at meeting paper machine operational requirements.
By the detailed description of the invention described above embodiment, be appreciated that, the present invention improves the method for paper strength, by improving the refining process of fluff pulp, maintaining under the defibrination production capacity prerequisite suitable with energy consumption, by to slurry concentration, the optimum organization of fiberizer dish tooth and defibrination power is used, can the fines content of mill disposed slurry be controlled at reasonable interval, drainage access issues between a large amount of fiber fines blocking pulp fibers that efficient solution never rationally defibrination process control and causing produces, the slurry that the method defibrination obtains is used for papermaking, paper strength can greatly be improved, be conducive to the fast dewatering of paper machine dewatering device simultaneously, improve the Forming Quality of wet web, effectively weaken wet web by the conquassation loss after press section of a paper machine, be beneficial to the trouble-free operation of paper machine.
On the basis of the method provided above, the embodiment of the present invention provides a kind of paper making pulp further, the slurry that the method that this paper making pulp comprises above-described embodiment prepares.
In order to further description technical scheme of the present invention, further illustrate below by detailed description of the invention:
Embodiment 1: setting defibrination production capacity-energy consumption is 350t/d-80kwh/t, adjustment slurry concentration to 5.0%, 1#/2#/3# grinding machine often encloses intersection tine length and is respectively 100/150/150km.rev, the defibrination power of 1#/2#/3# grinding machine selects mean allocation 33:33:33 mode, the fines content of 3# grinding machine outlet slurry is 24.2%, and even in paper machine operation process have the abnormal generation of disconnected paper.
Embodiment 2: setting defibrination production capacity-energy consumption is 350t/d-80kwh/t, adjustment slurry concentration to 5.0%, 1#/2#/3# grinding machine often encloses intersection tine length and is respectively 90/140/140km.rev, the defibrination power of 1#/2#/3# grinding machine selects mean allocation 33:33:33 mode, the fines content of 3# grinding machine outlet slurry is 25.6%, and even in paper machine operation process have the abnormal generation of disconnected paper.
Embodiment 3: setting defibrination production capacity-energy consumption is 350t/d-80kwh/t, adjustment slurry concentration to 5.0%, 1#/2#/3# grinding machine often encloses intersection tine length and is respectively 110/160/160km.rev, the defibrination power of 1#/2#/3# grinding machine selects mean allocation 25:50:25 mode, the fines content of 3# grinding machine outlet slurry is 20.8%, and paper machine operation is good.
Embodiment 4: setting defibrination production capacity-energy consumption is 350t/d-80kwh/t, adjustment slurry concentration to 3.0%, 1#/2#/3# grinding machine often encloses intersection tine length and is respectively 110/160/160km.rev, the defibrination power of 1#/2#/3# grinding machine selects mean allocation 33:33:33 mode, the fines content of 3# grinding machine outlet slurry is 30.3%, paper machine is disconnected paper frequently, runs difficulty.
Embodiment 5: setting defibrination production capacity-energy consumption is 350t/d-80kwh/t, adjustment slurry concentration to 3.0%, 1#/2#/3# grinding machine often encloses intersection tine length and is respectively 110/160/160km.rev, the defibrination power of 1#/2#/3# grinding machine selects mean allocation 25:50:25 mode, the fines content of 3# grinding machine outlet slurry is 28.8%, paper machine is disconnected paper frequently, runs difficulty.
Embodiment 6: setting defibrination production capacity-energy consumption is 350t/d-80kwh/t, adjustment slurry concentration to 6.0%, 1#/2#/3# grinding machine often encloses intersection tine length and is respectively 110/160/160km.rev, the defibrination power of 1#/2#/3# grinding machine selects mean allocation 33:33:33 mode, the fines content of 3# grinding machine outlet slurry is 21.4%, and paper machine operation is good.
Embodiment 7: setting defibrination production capacity-energy consumption is 350t/d-80kwh/t, adjustment slurry concentration to 6.0%, 1#/2#/3# grinding machine often encloses intersection tine length and is respectively 110/160/160km.rev, the defibrination power of 1#/2#/3# grinding machine selects mean allocation 25:50:25 mode, the fines content of 3# grinding machine outlet slurry is 20.2%, and paper machine operation is good.
Table 1:
Can be found out by the above embodiments, by to the suitable adjustment of the defibrination power in defibrination process, fiberizer dish tooth and defibrination power and optimum organization, thus fines content, between 20 ~ 22%, can guarantee that paper machine operation is good like this after can effectively controlling defibrination.Meanwhile, from above experimental data, the paper pulp that method defibrination of the present invention obtains is used for paper making, preparation-obtained paper tensile property also gets a promotion.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. improve a method for paper strength, it is characterized in that, described method comprises:
Hardwood pulp is provided, adopts short slurry defibrination line to carry out defibrination to described hardwood pulp;
Be provided with at least two fiberizers be arranged in series in described short slurry defibrination line, along the trend of slurry, each fiberizer cutterhead often encloses intersection tine length and selects according to ascending principle;
The slurry concentration controlling First refiner inlet is 3.0 ~ 6.0%, and the slurry after too short slurry defibrination line defibrination is used for paper making.
2. method according to claim 1, is characterized in that, described First fiberizer cutterhead often enclose intersect tine length be 90 ~ 110km.rev, after fiberizer cutterhead often enclose intersect tine length be 140 ~ 160km.rev.
3. method according to claim 1, is characterized in that, is provided with three fiberizers be arranged in series in described short slurry defibrination line.
4. method according to claim 3, is characterized in that, described method also comprises:
Along the trend of slurry, the power averaging of each fiberizer distributes or sets according to the defibrination power division mode that weight is light.
5. method according to claim 3, is characterized in that, along the trend of slurry, the power ratio of each fiberizer is 25:50:25.
6. method according to claim 1, is characterized in that, described slurry fines content after too short slurry defibrination line defibrination is 20% ~ 27%.
7. method according to claim 1, is characterized in that, described slurry fines content after too short slurry defibrination line defibrination is 20% ~ 22%.
8. method according to claim 1, is characterized in that, described hardwood pulp is at least one in Eucalyptus class, Acacia class, birch class, poplar class and weedtree class.
9. method according to claim 1, is characterized in that, the slurry concentration of described First refiner inlet is 4.5 ~ 5.5%.
10. a paper making pulp, is characterized in that, described paper making pulp comprises the slurry that the method described in any one of claim 1-9 prepares.
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| CN201510452858.6A CN105088849B (en) | 2015-07-28 | 2015-07-28 | A kind of method for improving paper strength, paper making pulp |
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| CN201510452858.6A CN105088849B (en) | 2015-07-28 | 2015-07-28 | A kind of method for improving paper strength, paper making pulp |
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Cited By (2)
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| CN107254795A (en) * | 2017-06-21 | 2017-10-17 | 合肥龙发包装有限公司 | A kind of preparation method of the natural fiber paper of heat resistant |
| CN108914672A (en) * | 2018-08-13 | 2018-11-30 | 联盛纸业（龙海）有限公司 | A kind of efficient recycling production technology of OCC slurry |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107254795A (en) * | 2017-06-21 | 2017-10-17 | 合肥龙发包装有限公司 | A kind of preparation method of the natural fiber paper of heat resistant |
| CN107254795B (en) * | 2017-06-21 | 2019-04-23 | 合肥龙发包装有限公司 | A kind of preparation method of the natural fiber paper of heat resistant |
| CN108914672A (en) * | 2018-08-13 | 2018-11-30 | 联盛纸业（龙海）有限公司 | A kind of efficient recycling production technology of OCC slurry |
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