CN103790061A - Method for improving fine screening efficiency in packing paper pulp manufacturing procedures - Google Patents
Method for improving fine screening efficiency in packing paper pulp manufacturing procedures Download PDFInfo
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- CN103790061A CN103790061A CN201210433569.8A CN201210433569A CN103790061A CN 103790061 A CN103790061 A CN 103790061A CN 201210433569 A CN201210433569 A CN 201210433569A CN 103790061 A CN103790061 A CN 103790061A
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- fine screen
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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 method for improving the fine screening efficiency in packing paper pulp manufacturing procedures. The method includes steps of (1), pulp shredding: adding packing paper, water, compound enzymes and auxiliaries into a pulp shredder, and shredding mixtures of the packing paper, the water, the compound enzymes and the auxiliaries to obtain paper pulp with certain concentration; (2), fine screening: diluting the paper pulp, pouring the diluted paper pulp into a fine screening machine, starting the fine screening machine and collecting filter residues on the lower portion of the fine screening machine; (3), weighing: wrapping the filter residues by a net, centrifugally spinning and drying the net with the filter residues and weighing filter residues. The method has the advantages that the rheological property of the pulp is changed by the aid of the compound enzymes and the auxiliaries under the condition that fine screening equipment of a factory is unchanged, corresponding technological parameters are adjusted, accordingly, the fine screening efficiency and the quality of the paper pulp can be improved, and the economic cost of the factory can be greatly reduced.
Description
Technical field
The present invention relates to pulp technology for making paper, particularly relate to a kind of method of 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, the slurrying efficiency that improves wrapping paper has caused the concern of each side, and fine screen also causes people's great attention naturally as the important step of wrapping paper slurrying.The primary and foremost purpose of fine screen is exactly to retain elite slurry but the fiber do not thrown away.Practice shows, in waste paper pulp-making process, fine screen has determined 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 reasonably fine screen lectotype selection can reduce costs.How bringing into play the important function of fine screen equipment, is mainly at present to consider numerously from mechanical angle or technological parameter, in the angle of machinery, consider, as: rotor design, slotted screen design, gap size; On technological parameter, consider, 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 that improves fine screen efficiency in wrapping paper pulping process, in the situation that factory's fine screen equipment is constant, by changing slurry rheology energy, adjust corresponding process parameters, not only improve fine screen efficiency and pulp quality, and greatly reduced the financial cost of factory.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of method that improves fine screen efficiency in wrapping paper pulping process is provided, said method comprising the steps of:
(1) pulping: wrapping paper and water are joined in pulper, add complex enzyme and auxiliary agent simultaneously, size degradation obtains certain density paper pulp;
(2) fine screen: by pouring in fine screen device after described paper pulp dilution, start fine screen device, then collect filter residue in fine screen device bottom;
(3) weigh: described filter residue net is encased also 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, 0.03%～0.1% of wrapping paper weight described in 0.01%～0.03% simultaneously, size degradation 8 minutes, size degradation temperature is 45～65 ℃, pH is 5.0～8.0, obtains certain density paper pulp;
(2) fine screen: by pouring in fine screen device after described paper pulp dilution, start fine screen device, then collect filter residue in fine screen device bottom;
(3) weigh: described filter residue 120 object nets are encased also and survey 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, 0.03%～0.1% of wrapping paper weight described in 0.01%～0.03% simultaneously, size degradation 8 minutes, size degradation temperature is 55 ℃, pH is 7.0, obtains certain density paper pulp;
(2) fine screen: by pouring in fine screen device after described paper pulp dilution, start fine screen device, then collect filter residue in fine screen device bottom;
(3) weigh: described filter residue 120 object nets are encased also and survey 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, alive the living for 50000U/g, diastatic enzyme of the enzyme of the described cellulase enzyme for 2000U/g, zytase alive is 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 in the situation that factory's fine screen equipment is constant, use complex enzyme and auxiliary agent to change slurry rheology energy, adjust corresponding process parameters, not only improve fine screen efficiency and pulp quality, and greatly reduced the financial cost of factory.
The specific embodiment
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 simultaneously, 8 minutes size degradation time, size degradation temperature is 45 ℃, and pH is 5.0, obtains certain density paper pulp; Composite the forming of amylase that the cellulase that complex enzyme is 2000U/g by enzyme work, the zytase that enzyme work is 50000U/g and enzyme work are 4000U/g, 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 emitted and use 5.7L water that the paper pulp remaining in pulper is gone out, after stirring fully, dividing and measure slurries 3 times, measuring 3L at every turn; With glass bar, the slurries that measure are poured in fine screen device while stirring, started fine screen device and start timing, in the time that filtrate goes out without one-tenth plume, record the time, collect filter residue simultaneously from fine screen device bottom;
3, weigh: filter residue 120 object nets are encased also and survey its weight after centrifuge dripping.
PH is set to 6.0,7.0,8.0, repeats respectively above-mentioned experiment.
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 ℃, pH 5.0～8.0 conditions
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 simultaneously, 8 minutes size degradation time, size degradation temperature is 50 ℃, and pH is 5.0, obtains certain density paper pulp; Composite the forming of amylase that the cellulase that complex enzyme is 2000U/g by enzyme work, the zytase that enzyme work is 50000U/g and enzyme work are 4000U/g, 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 emitted and use 5.7L water that the paper pulp remaining in pulper is gone out, after stirring fully, dividing and measure slurries 3 times, measuring 3L at every turn; With glass bar, the slurries that measure are poured in fine screen device while stirring, started fine screen device and start timing, in the time that filtrate goes out without one-tenth plume, record the time, collect filter residue simultaneously from fine screen device bottom;
3, weigh: filter residue 120 object nets are encased also and survey its weight after centrifuge dripping.
PH is set to 6.0,7.0,8.0, repeats respectively above-mentioned experiment.
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 ℃, pH 5.0～8.0 conditions
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 simultaneously, 8 minutes size degradation time, size degradation temperature is 55 ℃, and pH is 5.0, obtains certain density paper pulp; Composite the forming of amylase that the cellulase that complex enzyme is 2000U/g by enzyme work, the zytase that enzyme work is 50000U/g and enzyme work are 4000U/g, 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 emitted and use 5.7L water that the paper pulp remaining in pulper is gone out, after stirring fully, dividing and measure slurries 3 times, measuring 3L at every turn; With glass bar, the slurries that measure are poured in fine screen device while stirring, started fine screen device and start timing, in the time that filtrate goes out without one-tenth plume, record the time, collect filter residue simultaneously from fine screen device bottom;
3, weigh: filter residue 120 object nets are encased also and survey its weight after centrifuge dripping.
PH is set to 6.0,7.0,8.0, repeats respectively above-mentioned experiment.
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 ℃, pH 5.0～8.0 conditions
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 simultaneously, 8 minutes size degradation time, size degradation temperature is 60 ℃, and pH is 5.0, obtains certain density paper pulp; Composite the forming of amylase that the cellulase that complex enzyme is 2000U/g by enzyme work, the zytase that enzyme work is 50000U/g and enzyme work are 4000U/g, 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 emitted and use 5.7L water that the paper pulp remaining in pulper is gone out, after stirring fully, dividing and measure slurries 3 times, measuring 3L at every turn; With glass bar, the slurries that measure are poured in fine screen device while stirring, started fine screen device and start timing, in the time that filtrate goes out without one-tenth plume, record the time, collect filter residue simultaneously from fine screen device bottom;
3, weigh: filter residue 120 object nets are encased also and survey its weight after centrifuge dripping.
PH is set to 6.0,7.0,8.0, repeats respectively above-mentioned experiment.
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 ℃, pH 5.0～8.0 conditions
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 simultaneously, 8 minutes size degradation time, size degradation temperature is 65 ℃, and pH is 5.0, obtains certain density paper pulp; Composite the forming of amylase that the cellulase that complex enzyme is 2000U/g by enzyme work, the zytase that enzyme work is 50000U/g and enzyme work are 4000U/g, 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 emitted and use 5.7L water that the paper pulp remaining in pulper is gone out, after stirring fully, dividing and measure slurries 3 times, measuring 3L at every turn; With glass bar, the slurries that measure are poured in fine screen device while stirring, started fine screen device and start timing, in the time that filtrate goes out without one-tenth plume, record the time, collect filter residue simultaneously from fine screen device bottom;
3, weigh: filter residue 120 object nets are encased also and survey its weight after centrifuge dripping.
PH is set to 6.0,7.0,8.0, repeats respectively above-mentioned experiment.
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 ℃, pH 5.0～8.0 conditions
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 ℃, pH is 7.0, obtains certain density paper pulp;
2, fine screen: paper pulp emitted and use 5.7L water that the paper pulp remaining in pulper is gone out, after stirring fully, dividing and measure slurries 3 times, measuring 3L at every turn; With glass bar, the slurries that measure are poured in fine screen device while stirring, started fine screen device and start timing, in the time that filtrate goes out without one-tenth plume, record the time, collect filter residue simultaneously from fine screen device bottom;
3, weigh: filter residue 120 object nets are encased also and survey 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 is saved 263s～446s, and fine screen efficiency improves 24.0%～48.8%; Solidfied material quality improves 3.52g～9.06g, and solidfied material quality improves 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 according to disclosed all instructions, can carry out various modifications and replacement to those details, these change all within protection scope of the present invention.Four corner of the present invention is provided by claims and any equivalent thereof.
Claims (9)
1. a method that improves fine screen efficiency in wrapping paper pulping process, is characterized in that, said method comprising the steps of:
(1) pulping: wrapping paper and water are joined in pulper, add complex enzyme and auxiliary agent simultaneously, size degradation obtains certain density paper pulp;
(2) fine screen: by pouring in fine screen device after described paper pulp dilution, start fine screen device, then collect filter residue in fine screen device bottom;
(3) weigh: described filter residue net is encased also and surveys its weight after centrifuge dripping.
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, 0.03%～0.1% of wrapping paper weight described in 0.01%～0.03% simultaneously, size degradation 8 minutes, size degradation temperature is 45～65 ℃, pH is 5.0～8.0, obtains certain density paper pulp;
(2) fine screen: by pouring in fine screen device after described paper pulp dilution, start fine screen device, then collect filter residue in fine screen device bottom;
(3) weigh: described filter residue 120 object nets are encased also and survey 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, 0.03%～0.1% of wrapping paper weight described in 0.01%～0.03% simultaneously, size degradation 8 minutes, size degradation temperature is 55 ℃, pH is 7.0, obtains certain density paper pulp;
(2) fine screen: by pouring in fine screen device after described paper pulp dilution, start fine screen device, then collect filter residue in fine screen device bottom;
(3) weigh: described filter residue 120 object nets are encased also and survey its weight after centrifuge dripping.
4. the method as described in claim 1～3 any one, is characterized in that, described auxiliary agent consists of the following composition by weight: polyethers 10%, rosin fat 45%, trimethylbenzene 25%, water 20%.
5. the method as described in claim 1～3 any one, is characterized in that, described complex enzyme consists of the following composition by weight: cellulase 50%, zytase 40%, amylase 10%.
6. method as claimed in claim 5, is characterized in that, the enzyme of described cellulase is lived and lived for the enzyme of 2000U/g, zytase is that 50000U/g, diastatic enzyme are lived as 4000U/g.
7. method as claimed in claim 6, is characterized in that, described cellulase derives from animal, plant or microorganism.
8. method as claimed in claim 6, is characterized in that, described zytase derives from animal, plant or microorganism.
9. method as claimed in claim 6, is characterized in that, described amylase derives from animal, plant or microorganism.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112921691A (en) * | 2021-01-20 | 2021-06-08 | 山鹰国际控股股份公司 | Treatment process of waste pulp waste residue of waste corrugated case paperboard waste paper |
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Effective date of registration: 20170616 Address after: 247100 Shuanglong Road 1, Chizhou economic and Technological Development Zone, Anhui, China Patentee after: Anhui Lvweikang Biological Technology Co. Ltd. Address before: 523808, Guangdong, Dongguan Songshan Lake Science and Technology Industrial Park - Innovation Technology Park, building 4, 3 floor Patentee before: Dongguan Leveking Biotechnology Co., Ltd. |