CN103790061B - Improve the method for fine screen efficiency in wrapping paper pulping process - Google Patents
Improve the method for fine screen efficiency in wrapping paper pulping process Download PDFInfo
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- CN103790061B CN103790061B CN201210433569.8A CN201210433569A CN103790061B CN 103790061 B CN103790061 B CN 103790061B CN 201210433569 A CN201210433569 A CN 201210433569A CN 103790061 B CN103790061 B CN 103790061B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Abstract
The invention discloses a kind of method improving fine screen efficiency in wrapping paper pulping process, said method comprising the steps of: (1) pulping: wrapping paper and water are joined in pulper, add complex enzyme and auxiliary agent, size degradation obtains certain density paper pulp simultaneously; (2) fine screen: will pour in fine screen device after described pulp dilution, starts fine screen device, then at fine screen device collective low filter residue; (3) weigh: described filter residue net is encased and surveys its weight after centrifuge dripping.The present invention is when factory's fine screen equipment is constant, and use complex enzyme and auxiliary agent to change slurry rheology energy, adjustment corresponding process parameters, not only increases fine screen efficiency and pulp quality, and greatly reduce the financial cost of factory.
Description
Technical field
The present invention relates to pulp technology for making paper, particularly relate to a kind of method using complex enzyme and auxiliary agent to improve fine screen efficiency in wrapping paper pulping process.
Background technology
Nearly ten years, the growth rate of China's wrapping paper reached 17% ~ 20%, and package paper rises to present 60% at the proportion of national paper nearly from original 40%.Along with the increase of every Material Cost, improve the concern that the pulping efficiency of wrapping paper causes each side, fine screen also causes the great attention of people naturally as the important step of wrapping paper slurrying.The primary and foremost purpose of fine screen is exactly retain elite slurry but the fiber do not thrown away.Practice shows, in waste paper pulp-making process, fine screen determines secondary stock quality index quality.Therefore, screening installation occupies considerable status in pulping and paper-making industry, and its result of use directly affects into the quality of paper, and rational fine screen lectotype selection can reduce costs.How to play the important function of fine screen equipment, mainly consider numerous from the angle of machinery or technological parameter at present, the angle of machinery is considered, as: the design of rotor design, slotted screen, gap size; Technological parameter is considered, as: flow, concentration, pressure etc.; Improve fine screen efficiency by change fine screen gap, raising pressure, reduction slurry concentration, but so, factory to pay higher financial cost, and, because the quality fluctuation of secondary stock is large, technological parameter is unstable, is difficult to find a kind of relatively good solution.The method that can improve fine screen efficiency by changing slurry rheology have not been reported.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of method improving fine screen efficiency in wrapping paper pulping process, when factory's fine screen equipment is constant, by changing slurry rheology energy, adjustment corresponding process parameters, not only increase fine screen efficiency and pulp quality, and greatly reduce the financial cost of factory.
For solving the problems of the technologies described above, the technical solution used in the present invention is: provide a kind of method improving fine screen efficiency in wrapping paper pulping process, said method comprising the steps of:
(1) pulping: join in pulper by wrapping paper and water, adds complex enzyme and auxiliary agent simultaneously, and size degradation obtains certain density paper pulp;
(2) fine screen: will pour in fine screen device after described pulp dilution, starts fine screen device, then at fine screen device collective low filter residue;
(3) weigh: described filter residue net is encased and surveys its weight after centrifuge dripping.
Preferably, said method comprising the steps of:
(1) pulping: wrapping paper and water are joined in pulper, add the auxiliary agent of wrapping paper weight described in the complex enzyme of wrapping paper weight described in 0.01% ~ 0.03%, 0.03% ~ 0.1% simultaneously, size degradation 8 minutes, size degradation temperature is 45 ~ 65 DEG C, pH is 5.0 ~ 8.0, obtains certain density paper pulp;
(2) fine screen: will pour in fine screen device after described pulp dilution, starts fine screen device, then at fine screen device collective low filter residue;
(3) weigh: described filter residue 120 object nets are encased and surveys its weight after centrifuge dripping.
More preferably, said method comprising the steps of:
(1) pulping: wrapping paper and water are joined in pulper, add the auxiliary agent of wrapping paper weight described in the complex enzyme of wrapping paper weight described in 0.01% ~ 0.03%, 0.03% ~ 0.1%, size degradation 8 minutes, size degradation temperature is 55 DEG C simultaneously, pH is 7.0, obtains certain density paper pulp;
(2) fine screen: will pour in fine screen device after described pulp dilution, starts fine screen device, then at fine screen device collective low filter residue;
(3) weigh: described filter residue 120 object nets are encased and surveys its weight after centrifuge dripping.
Preferably, described auxiliary agent consists of the following composition by weight: polyethers 10%, rosin fat 45%, trimethylbenzene 25%, water 20%.
Preferably, described complex enzyme consists of the following composition by weight: cellulase 50%, zytase 40%, amylase 10%.
Preferably, the enzyme of described cellulase is lived as the enzyme of 2000U/g, zytase is lived as 50000U/g, diastatic enzyme are lived as 4000U/g.
Preferably, described cellulase derives from animal, plant or microorganism.
Preferably, described zytase derives from animal, plant or microorganism.
Preferably, described amylase derives from animal, plant or microorganism.
The invention has the beneficial effects as follows: be different from existing by change fine screen gap, improve pressure, reduce slurry concentration improve fine screen efficiency, cause factory will pay the situation of higher financial cost, the present invention is when factory's fine screen equipment is constant, complex enzyme and auxiliary agent is used to change slurry rheology energy, adjustment corresponding process parameters, not only increase fine screen efficiency and pulp quality, and greatly reduce the financial cost of factory.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in detail.
Embodiment 1
1, pulping: 300 grams of wrapping papers and 3L water are joined in pulper, add 0.03 gram of complex enzyme, 0.09 gram of auxiliary agent, beating time 8 minutes, size degradation temperature is 45 DEG C, and pH is 5.0, obtains certain density paper pulp simultaneously; Complex enzyme by enzyme work be the cellulase of 2000U/g, the amylase of enzyme work to be the zytase of 50000U/g and enzyme work be 4000U/g is composite forms, by weight, cellulase 50%, zytase 40%, amylase 10%; Auxiliary agent consists of the following composition by weight: polyethers 10%, rosin fat 45%, trimethylbenzene 25%, water 20%.
2, fine screen: paper pulp is released and uses 5.7L water that the paper pulp remained in pulper is gone out, stirs fully, divides and measure slurries 3 times, measure 3L at every turn; With glass bar, the slurries measured are poured in fine screen device while stirring, start fine screen device and start timing, record the time when filtrate goes out without one-tenth plume, simultaneously from fine screen device collective low filter residue;
3, weigh: filter residue 120 object nets are encased and surveys its weight after centrifuge dripping.
PH is set to 6.0,7.0,8.0, repeats above-mentioned experiment respectively.
Experimental result under each pH condition is averaged, and the results are shown in Table 1.
Fine screen time and filter residue (solidfied material) quality under table 145 DEG C, pH5.0 ~ 8.0 condition
Embodiment 2
1, pulping: 300 grams of wrapping papers and 3L water are joined in pulper, add 0.05 gram of complex enzyme, 0.15 gram of auxiliary agent, beating time 8 minutes, size degradation temperature is 50 DEG C, and pH is 5.0, obtains certain density paper pulp simultaneously; Complex enzyme by enzyme work be the cellulase of 2000U/g, the amylase of enzyme work to be the zytase of 50000U/g and enzyme work be 4000U/g is composite forms, by weight, cellulase 50%, zytase 40%, amylase 10%; Auxiliary agent consists of the following composition by weight: polyethers 10%, rosin fat 45%, trimethylbenzene 25%, water 20%.
2, fine screen: paper pulp is released and uses 5.7L water that the paper pulp remained in pulper is gone out, stirs fully, divides and measure slurries 3 times, measure 3L at every turn; With glass bar, the slurries measured are poured in fine screen device while stirring, start fine screen device and start timing, record the time when filtrate goes out without one-tenth plume, simultaneously from fine screen device collective low filter residue;
3, weigh: filter residue 120 object nets are encased and surveys its weight after centrifuge dripping.
PH is set to 6.0,7.0,8.0, repeats above-mentioned experiment respectively.
Experimental result under each pH condition is averaged, and the results are shown in Table 2.
Fine screen time and filter residue (solidfied material) quality under table 250 DEG C, pH5.0 ~ 8.0 condition
Embodiment 3
1, pulping: 300 grams of wrapping papers and 3L water are joined in pulper, add 0.06 gram of complex enzyme, 0.2 gram of auxiliary agent, beating time 8 minutes, size degradation temperature is 55 DEG C, and pH is 5.0, obtains certain density paper pulp simultaneously; Complex enzyme by enzyme work be the cellulase of 2000U/g, the amylase of enzyme work to be the zytase of 50000U/g and enzyme work be 4000U/g is composite forms, by weight, cellulase 50%, zytase 40%, amylase 10%; Auxiliary agent consists of the following composition by weight: polyethers 10%, rosin fat 45%, trimethylbenzene 25%, water 20%.
2, fine screen: paper pulp is released and uses 5.7L water that the paper pulp remained in pulper is gone out, stirs fully, divides and measure slurries 3 times, measure 3L at every turn; With glass bar, the slurries measured are poured in fine screen device while stirring, start fine screen device and start timing, record the time when filtrate goes out without one-tenth plume, simultaneously from fine screen device collective low filter residue;
3, weigh: filter residue 120 object nets are encased and surveys its weight after centrifuge dripping.
PH is set to 6.0,7.0,8.0, repeats above-mentioned experiment respectively.
Experimental result under each pH condition is averaged, and the results are shown in Table 3.
Fine screen time and filter residue (solidfied material) quality under table 355 DEG C, pH5.0 ~ 8.0 condition
Embodiment 4
1, pulping: 300 grams of wrapping papers and 3L water are joined in pulper, add 0.07 gram of complex enzyme, 0.25 gram of auxiliary agent, beating time 8 minutes, size degradation temperature is 60 DEG C, and pH is 5.0, obtains certain density paper pulp simultaneously; Complex enzyme by enzyme work be the cellulase of 2000U/g, the amylase of enzyme work to be the zytase of 50000U/g and enzyme work be 4000U/g is composite forms, by weight, cellulase 50%, zytase 40%, amylase 10%; Auxiliary agent consists of the following composition by weight: polyethers 10%, rosin fat 45%, trimethylbenzene 25%, water 20%.
2, fine screen: paper pulp is released and uses 5.7L water that the paper pulp remained in pulper is gone out, stirs fully, divides and measure slurries 3 times, measure 3L at every turn; With glass bar, the slurries measured are poured in fine screen device while stirring, start fine screen device and start timing, record the time when filtrate goes out without one-tenth plume, simultaneously from fine screen device collective low filter residue;
3, weigh: filter residue 120 object nets are encased and surveys its weight after centrifuge dripping.
PH is set to 6.0,7.0,8.0, repeats above-mentioned experiment respectively.
Experimental result under each pH condition is averaged, and the results are shown in Table 4.
Fine screen time and filter residue (solidfied material) quality under table 460 DEG C, pH5.0 ~ 8.0 condition
Embodiment 5
1, pulping: 300 grams of wrapping papers and 3L water are joined in pulper, add 0.09 gram of complex enzyme, 0.3 gram of auxiliary agent, beating time 8 minutes, size degradation temperature is 65 DEG C, and pH is 5.0, obtains certain density paper pulp simultaneously; Complex enzyme by enzyme work be the cellulase of 2000U/g, the amylase of enzyme work to be the zytase of 50000U/g and enzyme work be 4000U/g is composite forms, by weight, cellulase 50%, zytase 40%, amylase 10%; Auxiliary agent consists of the following composition by weight: polyethers 10%, rosin fat 45%, trimethylbenzene 25%, water 20%.
2, fine screen: paper pulp is released and uses 5.7L water that the paper pulp remained in pulper is gone out, stirs fully, divides and measure slurries 3 times, measure 3L at every turn; With glass bar, the slurries measured are poured in fine screen device while stirring, start fine screen device and start timing, record the time when filtrate goes out without one-tenth plume, simultaneously from fine screen device collective low filter residue;
3, weigh: filter residue 120 object nets are encased and surveys its weight after centrifuge dripping.
PH is set to 6.0,7.0,8.0, repeats above-mentioned experiment respectively.
Experimental result under each pH condition is averaged, and the results are shown in Table 5.
Fine screen time and filter residue (solidfied material) quality under table 565 DEG C, pH5.0 ~ 8.0 condition
Comparative example
1, pulping: 300 grams of wrapping papers and 3L water are joined in pulper, size degradation 8 minutes, size degradation temperature is 55 DEG C, and pH is 7.0, obtains certain density paper pulp;
2, fine screen: paper pulp is released and uses 5.7L water that the paper pulp remained in pulper is gone out, stirs fully, divides and measure slurries 3 times, measure 3L at every turn; With glass bar, the slurries measured are poured in fine screen device while stirring, start fine screen device and start timing, record the time when filtrate goes out without one-tenth plume, simultaneously from fine screen device collective low filter residue;
3, weigh: filter residue 120 object nets are encased and surveys its weight after centrifuge dripping.
Experimental result is averaged, and result is: fine screen time 1360s, filter residue (solidfied material) quality 84.63g.
From each embodiment and comparative example, the fine screen time saves 263s ~ 446s, and fine screen efficiency improves 24.0% ~ 48.8%; Solidfied material Quality advance 3.52g ~ 9.06g, solidfied material Quality advance 4.2% ~ 10.7%.
Although the specific embodiment of the present invention has obtained detailed description, it will be understood to those of skill in the art that can carry out various amendment and replacement to those details, these change all within protection scope of the present invention according to disclosed all instructions.Four corner of the present invention is provided by claims and any equivalent thereof.
Claims (7)
1. improve a method for fine screen efficiency in wrapping paper pulping process, it is characterized in that, said method comprising the steps of:
(1) pulping: join in pulper by wrapping paper and water, adds complex enzyme and auxiliary agent simultaneously, and size degradation obtains certain density paper pulp;
(2) fine screen: will pour in fine screen device after described pulp dilution, starts fine screen device, then at fine screen device collective low filter residue;
(3) weigh: described filter residue net is encased and surveys its weight after centrifuge dripping;
Described complex enzyme consists of the following composition by weight: cellulase 50%, zytase 40%, amylase 10%;
Described auxiliary agent consists of the following composition by weight: polyethers 10%, rosin fat 45%, trimethylbenzene 25%, water 20%.
2. the method for claim 1, is characterized in that, said method comprising the steps of:
(1) pulping: wrapping paper and water are joined in pulper, add the auxiliary agent of wrapping paper weight described in the complex enzyme of wrapping paper weight described in 0.01% ~ 0.03%, 0.03% ~ 0.1% simultaneously, size degradation 8 minutes, size degradation temperature is 45 ~ 65 DEG C, pH is 5.0 ~ 8.0, obtains certain density paper pulp;
(2) fine screen: will pour in fine screen device after described pulp dilution, starts fine screen device, then at fine screen device collective low filter residue;
(3) weigh: described filter residue 120 object nets are encased and surveys its weight after centrifuge dripping.
3. method as claimed in claim 2, is characterized in that, said method comprising the steps of:
(1) pulping: wrapping paper and water are joined in pulper, add the auxiliary agent of wrapping paper weight described in the complex enzyme of wrapping paper weight described in 0.01% ~ 0.03%, 0.03% ~ 0.1%, size degradation 8 minutes, size degradation temperature is 55 DEG C simultaneously, pH is 7.0, obtains certain density paper pulp;
(2) fine screen: will pour in fine screen device after described pulp dilution, starts fine screen device, then at fine screen device collective low filter residue;
(3) weigh: described filter residue 120 object nets are encased and surveys its weight after centrifuge dripping.
4. the method as described in any one of claims 1 to 3, is characterized in that, the enzyme of described cellulase is lived as the enzyme of 2000U/g, zytase is lived as 50000U/g, diastatic enzyme are lived as 4000U/g.
5. method as claimed in claim 4, it is characterized in that, described cellulase derives from animal, plant or microorganism.
6. method as claimed in claim 4, it is characterized in that, described zytase derives from animal, plant or microorganism.
7. method as claimed in claim 4, it is characterized in that, described amylase derives from animal, plant or microorganism.
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