CN111188218A - Method for pulping by crescent paper machine - Google Patents
Method for pulping by crescent paper machine Download PDFInfo
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- CN111188218A CN111188218A CN202010049727.4A CN202010049727A CN111188218A CN 111188218 A CN111188218 A CN 111188218A CN 202010049727 A CN202010049727 A CN 202010049727A CN 111188218 A CN111188218 A CN 111188218A
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- pulp
- pulping
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- fibers
- tank
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- 238000004537 pulping Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000000835 fiber Substances 0.000 claims abstract description 88
- 238000010009 beating Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 13
- 239000002002 slurry Substances 0.000 claims abstract description 13
- 238000005086 pumping Methods 0.000 claims abstract description 9
- 239000011121 hardwood Substances 0.000 claims abstract description 8
- 239000011122 softwood Substances 0.000 claims abstract description 8
- 238000007865 diluting Methods 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 238000005520 cutting process Methods 0.000 claims abstract description 3
- 239000013538 functional additive Substances 0.000 claims abstract description 3
- 238000005265 energy consumption Methods 0.000 claims description 12
- 238000007670 refining Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- 239000002893 slag Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 238000009740 moulding (composite fabrication) Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000000227 grinding Methods 0.000 description 3
- 102000004190 Enzymes Human genes 0.000 description 2
- 108090000790 Enzymes Proteins 0.000 description 2
- 239000004902 Softening Agent Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000002925 chemical effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
Classifications
-
- 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
- D21D1/02—Methods of beating; Beaters of the Hollander type
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/34—Kneading or mixing; Pulpers
- D21B1/345—Pulpers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
The invention relates to a method for pulping by a crescent paper machine, which comprises the following steps: (1) adding softwood pulp and hardwood pulp into a long fiber pulping machine in proportion, adding water to adjust the concentration of wood pulp, then performing disintegration, and pumping into a pulp tank before long fiber beating; (2) adding water to adjust the concentration of the wood pulp, treating the wood pulp by a No. 1 pulping machine, cutting and fibrillating fibers, and then feeding the fibers into a pulp tank after long fiber beating; (3) pumping the pulp in the pulp tank after the long fibers are knocked into a mixed pulp tank, adding water to adjust the concentration of wood pulp, treating the pulp by a No. 2 pulping machine, further treating the fibers, and then feeding the fibers into a pulping tank; (4) and adding corresponding functional additives into the slurry discharged from the slurry forming pool according to the product requirements, and further diluting the slurry to finish the preparation. Compared with the prior art, the invention has obvious energy-saving effect because the short fiber wire is not used, and the short fiber pulper, the short fiber pulp tank stirrer and the pulp supply pump on the short fiber wire are not used.
Description
Technical Field
The invention relates to a paper pulp processing method, in particular to a pulping method of a crescent paper machine.
Background
High-speed crescent paper machines for household paper generally have 3 pulp treatment lines: respectively long fiber lines, short fiber lines and broken paper lines, so the conventional slurry treatment design flow is as follows: (1) and (3) long fiber: long fiber pulp bag → long fiber hydrapulper → high concentration slag separator → pulp pool before long fiber beating → No. 1 pulp grinder; (2) short fiber wire: short fiber pulp bag → short fiber hydrapulper → high concentration slag separator → pulp pond before short fiber beating → fluffer; (3) and (3) damaging the paper line: broke → broke tank → high consistency scummer → fluffer (or No. 1 refiner).
According to the process, the pulp of the long fiber lines, the short fiber lines and the broke lines is mixed according to a certain proportion and enters a No. 2 pulp grinder, and the pulping characteristic is as follows: the long fiber pulp and the short fiber pulp are prepared separately, and because the long fiber pulp and the short fiber pulp are prepared separately, the pulp amount of one-time pulping is large, and the pulp storage time is long, so the following defects are brought: (1) the operation is not flexible, and the required pulp is different for paper machines with more production types and different paper products. Therefore, the traditional pulping mode brings loss due to the replacement of pulp in the process of production change; (2) in the traditional pulping mode, the size of one-time pulping is large, the size cannot be used up in time, and in order to ensure the stability of the size concentration and prevent the abnormal production caused by the flocculation and agglomeration of the size, the long and short fiber pulp tower stirrer must be kept open for 24 hours, thereby increasing the power consumption; (3) the slurry is stored for a long time, and the influence on the chemical effect is large. Some chemicals can be added when long and short fiber pulp enters the pulp tower, a certain effect is expected to be achieved (such as adding CMC and pulping enzyme, and hopefully achieving the purpose of increasing dry strength and the like), but the reaction time is too long due to the fact that the pulp in the long and short fiber pulp tower cannot be used up in time, the effect of the chemicals is greatly reduced, the effect of the chemicals cannot be optimal, and the realization of paper quality is influenced.
Disclosure of Invention
The invention aims to solve the problems and provide a method for pulping by a crescent-shaped paper machine.
The purpose of the invention is realized by the following technical scheme:
a method for pulping by a crescent paper machine comprises the following steps:
(1) adding softwood pulp and hardwood pulp into a long fiber pulping machine in proportion, adding water to adjust the concentration of wood pulp, then performing disintegration, and pumping into a pulp tank before long fiber beating;
(2) adding water to adjust the concentration of the wood pulp, treating the wood pulp by a No. 1 pulping machine, cutting and fibrillating fibers, and then feeding the fibers into a pulp tank after long fiber beating;
(3) pumping the pulp in the pulp tank after the long fibers are knocked into a mixed pulp tank, adding water to adjust the concentration of wood pulp, treating the pulp by a No. 2 pulping machine, further treating the fibers, and then feeding the fibers into a pulping tank;
(4) and adding corresponding functional additives into the slurry discharged from the slurry forming pool according to the product requirements, and further diluting the slurry to finish the preparation.
Preferably, the concentration in the step (1) is 5.0-7.0 wt%, for the same equipment, increasing the pulping concentration can enhance the mutual friction among fibers and increase the contact area between the fibers and a rotor, so that the fiber pulping can be accelerated and the pulping time can be shortened, but the pulping time can be prolonged under the condition of excessively high pulping concentration, so that the specific energy consumption can be rapidly increased, the concentration limited to 5.0-7.0 wt% is reasonable, and the pulping time is 8-15 min.
Preferably, the mass ratio of the softwood pulp to the hardwood pulp in the step (1) is 18-55: 82-45 in terms of air-dried mass.
Preferably, the concentration of the step (2) is 4.0-5.0 wt%, the cut fiber is taken as the main fiber, and the fiber is cut and broomed.
Preferably, the refining energy consumption in the step (2) is controlled to be 50-105 kwh/t through adjustment of refining distance.
Preferably, the concentration of the step (3) is 3.0-4.0 wt%, the fiber is mainly broomed, and the fiber is further broomed to enable the fiber to be better interwoven so as to obtain better tension.
Preferably, the refining energy consumption is controlled to be 0-60 kwh/t by adjusting the refining distance in the step (3).
Preferably, the concentration of the step (4) is 2.9-3.1 wt%.
The lower the concentration, the better the uniformity of the paper sheet, but the lower the concentration affects the productivity of a paper machine, and preferably, the prepared pulp is diluted to the concentration of 0.2-0.25 wt% by a fan pump and enters a paper machine for forming, pressing and drying.
Compared with the existing crescent pulp supply system, the invention has the characteristics that:
1. and (3) reducing energy consumption: the short fiber pulper, the short fiber pulp tank stirrer and the pulp supply pump on the short fiber line are stopped, so that the energy-saving effect is achieved.
The equipment that can be deactivated is (electricity rate is 0.7655 yuan/degree, load is calculated according to 85%):
the short fiber pulper 160kw/h, 6 hours on: 160 × 6 × 0.7655 × 0.85 ═ 624.67 yuan/day;
a short fiber slurry pool stirrer (one stirrer before short fiber beating and one stirrer after short fiber beating, 2 stirrers in total, and the stirrer is opened after 24 hours): 37 × 24 × 0.7655 × 2.85 ═ 1147.93 yuan/day;
a staple fiber slurry supply pump (one before and one after the staple fiber beating, 2 in total, and 18 hours on): 30, 18, 0.7655, 2, 0.85, 702.73 yuan/day;
because the short fiber is not used, the preparation time of the sizing agent is increased for the long fiber, and the running time of the long fiber equipment is increased, the energy-saving benefit is calculated by 70 percent, namely: (624.67+1147.93+702.73) × 70% ═ 1732.73 yuan/day.
2. The invention stops using the short fiber, shortens the storage time of the pulp, thereby enabling the effect of certain chemicals such as CMC and pulping enzyme to be best played when the chemicals are used, better improving the quality of paper and reducing the influence of the reaction of the chemicals for a long time on a papermaking system.
3. The short fiber wire is not used, the long fiber and the short fiber are mixed according to a certain proportion, the production regulation reaction is fast, the production change is flexible, the operation is convenient, and the raw paper loss caused by bad sizing agent is reduced.
4. The invention stops using the short fiber, which can greatly reduce the maintenance cost of the device.
Detailed Description
The present invention is described in detail below with reference to specific examples, but the present invention is not limited thereto in any way.
Example 1
Production of high-quantitative toilet paper
(1)2.5 bags of softwood pulp (220 kg per bag of air dry weight) and 4.5 bags of hardwood pulp (250 kg per bag of air dry weight) are put into a long fiber pulping machine, water is added to adjust the concentration to 6.8 wt% for pulping, the pulping time is 14min, and then the pulp is pumped into a pulp pond before long fiber beating;
(2) adding water into the mixed pulp in a pulp tank before long fiber beating to adjust the concentration to about 4.7 wt%, passing through a high-concentration slag separator, passing through a No. 1 pulping machine, and feeding the grinded pulp into a pulp tank after long fiber beating, wherein the pulping energy consumption is 90 kwh/t;
(3) pumping the pulp in the pulp tank after knocking into a mixed pulp tank, adding water to adjust the concentration to be about 3.7 wt%, passing through a No. 2 pulp grinder, feeding, performing pulp grinding with energy consumption of 5kwh/t, slightly treating fibers, then passing through a pressure sieve, and then entering into a pulp forming tank;
(4) diluting the pulp from the pulp forming pool to the concentration of 3.08 wt% and preparing to pump to a paper machine;
(5) the pulp is diluted to the concentration of 0.23 wt% by a fan pump and enters a paper machine for forming, pressing and drying.
Example 2
Production of high-quality handkerchief paper
(1)3 bags of softwood pulp (220 kg per bag of air dry weight) and 4.5 bags of hardwood pulp (250 kg per bag of air dry weight) are put into a long fiber pulping machine, water is added to adjust the concentration to 6.7 wt% for pulping, the pulping time is 12min, and then the pulp is pumped into a pulp pond before long fiber beating;
(2) adding water into the mixed pulp in a pulp tank before long fiber beating to adjust the concentration to about 4.53 wt%, passing through a high-concentration slag separator, passing through a No. 1 pulping machine, and feeding the grinded pulp into a pulp tank after long fiber beating, wherein the pulping energy consumption is 85 kwh/t;
(3) pumping the pulp in the pulp tank after knocking into a mixed pulp tank, adding water to adjust the concentration to be about 3.66 wt%, passing through a No. 2 pulp grinder, feeding, performing pulp grinding with energy consumption of 10kwh/t, slightly treating fibers, then passing through a pressure sieve, and then entering into a pulp forming tank;
(4) adding 0.5kg/t of softening agent into the pulp from the pulp forming pool, concentrating and diluting the pulp to 3.05 wt%, and preparing to pump the pulp to a paper machine;
(5) the pulp is diluted to a concentration of 0.24 wt% by a fan pump and enters a paper machine for forming, pressing and drying.
Example 3
Producing low basis weight facial tissue
(1)2 bags of softwood pulp (220 kg per bag of air dry weight) and 5 bags of hardwood pulp (250 kg per bag of air dry weight) are put into a long fiber pulping machine, water is added to adjust the concentration to 6.54 wt% for pulping, the pulping time is 10min, and then the pulp is pumped into a pulp pond before long fiber beating;
(2) adding water into the mixed pulp in a pulp tank before long fiber beating to adjust the concentration to about 4.46 wt%, passing through a high-concentration slag separator, passing through a No. 1 pulping machine, and feeding the grinded pulp into a pulp tank after long fiber beating, wherein the pulping energy consumption is 80 kwh/t;
(3) pumping the pulp in the pulp tank after knocking into a mixed pulp tank, adding water to adjust the concentration to be about 3.52 wt%, passing through a No. 2 pulp grinder, feeding, performing pulp grinding with energy consumption of 0kwh/t, slightly treating fibers, then passing through a pressure sieve, and then entering into a pulp forming tank;
(4) adding 0.85kg/t of softening agent into the pulp discharged from the pulp forming pool, concentrating and diluting the pulp to 3.03 wt%, and preparing to pump the pulp to a paper machine;
(5) the pulp is diluted to a concentration of 0.21 wt% by a fan pump and enters a paper machine for forming, pressing and drying.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (9)
1. A method for pulping by a crescent paper machine is characterized by comprising the following steps:
(1) adding softwood pulp and hardwood pulp into a long fiber pulping machine in proportion, adding water to adjust the concentration of wood pulp, then performing disintegration, and pumping into a pulp tank before long fiber beating;
(2) adding water to adjust the concentration of the wood pulp, treating the wood pulp by a No. 1 pulping machine, cutting and fibrillating fibers, and then feeding the fibers into a pulp tank after long fiber beating;
(3) pumping the pulp in the pulp tank after the long fibers are knocked into a mixed pulp tank, adding water to adjust the concentration of wood pulp, treating the pulp by a No. 2 pulping machine, further treating the fibers, and then feeding the fibers into a pulping tank;
(4) and adding corresponding functional additives into the slurry discharged from the slurry forming pool according to the product requirements, and further diluting the slurry to finish the preparation.
2. The pulping method of crescent-shaped paper machine according to claim 1, characterized in that the concentration of step (1) is 5.0-7.0 wt%, and the disintegration time is 8-15 min.
3. The pulping method of a crescent-shaped paper machine according to claim 1, wherein the mass ratio of the softwood pulp to the hardwood pulp in step (1) is 18-55: 82-45 in terms of air-dried mass.
4. The method of claim 1, wherein the concentration of step (2) is 4.0-5.0 wt%.
5. The pulping method of the crescent paper machine according to claim 1, wherein the refining energy consumption in the step (2) is controlled to be 50-105 kwh/t by adjusting the refining distance.
6. The method of claim 1, wherein the concentration of step (3) is 3.0-4.0 wt%.
7. The pulping method of the crescent paper machine according to claim 1, wherein the refining energy consumption in the step (3) is controlled to be 0-60 kwh/t through the adjustment of the refining distance.
8. The method of claim 1, wherein the concentration of step (4) is 2.9-3.1 wt%.
9. The method for pulping by using a crescent-shaped paper machine according to any one of claims 1-8, wherein the prepared pulp is diluted to a concentration of 0.2-0.25 wt% by using a fan pump, enters a paper machine, is pressed and is dried.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010049727.4A CN111188218A (en) | 2020-01-16 | 2020-01-16 | Method for pulping by crescent paper machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010049727.4A CN111188218A (en) | 2020-01-16 | 2020-01-16 | Method for pulping by crescent paper machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111188218A true CN111188218A (en) | 2020-05-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010049727.4A Pending CN111188218A (en) | 2020-01-16 | 2020-01-16 | Method for pulping by crescent paper machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111188218A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2058541A1 (en) * | 1990-12-29 | 1992-06-30 | Wilhelm Menges | Fibrous component for paper production, paper made therewith and use thereof and method for producing fibrous component and paper |
| CN101302733A (en) * | 2008-06-13 | 2008-11-12 | 潍坊恒联铜版纸有限公司 | Dust-free paper papermaking process |
| CN203700855U (en) * | 2013-12-20 | 2014-07-09 | 上海东冠纸业有限公司 | Defibrination system for papermaking |
| CN104711900A (en) * | 2013-12-17 | 2015-06-17 | 上海东冠纸业有限公司 | Making method of water absorption lining paper for sanitary napkins |
| CN104711892A (en) * | 2013-12-17 | 2015-06-17 | 上海东冠纸业有限公司 | Wet wipe base material making method |
| CN105155329A (en) * | 2015-07-22 | 2015-12-16 | 浙江惠同纸业有限公司 | Body paper of washi adhesive tape and production method for body paper |
| CN105239445A (en) * | 2015-09-02 | 2016-01-13 | 浙江惠同新材料股份有限公司 | Raw paper of crepe paper and production method thereof |
| CN105568746A (en) * | 2015-12-16 | 2016-05-11 | 重庆龙璟纸业有限公司 | Body paper of wettable tissues and production process of body paper |
| CN106930137A (en) * | 2015-12-29 | 2017-07-07 | 上海东冠纸业有限公司 | A kind of preparation method of the napkin paper for improving deflection |
| CN107313283A (en) * | 2016-04-27 | 2017-11-03 | 上海东冠纸业有限公司 | A kind of preparation method of wettable water paper handkerchief |
-
2020
- 2020-01-16 CN CN202010049727.4A patent/CN111188218A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2058541A1 (en) * | 1990-12-29 | 1992-06-30 | Wilhelm Menges | Fibrous component for paper production, paper made therewith and use thereof and method for producing fibrous component and paper |
| CN101302733A (en) * | 2008-06-13 | 2008-11-12 | 潍坊恒联铜版纸有限公司 | Dust-free paper papermaking process |
| CN104711900A (en) * | 2013-12-17 | 2015-06-17 | 上海东冠纸业有限公司 | Making method of water absorption lining paper for sanitary napkins |
| CN104711892A (en) * | 2013-12-17 | 2015-06-17 | 上海东冠纸业有限公司 | Wet wipe base material making method |
| CN203700855U (en) * | 2013-12-20 | 2014-07-09 | 上海东冠纸业有限公司 | Defibrination system for papermaking |
| CN105155329A (en) * | 2015-07-22 | 2015-12-16 | 浙江惠同纸业有限公司 | Body paper of washi adhesive tape and production method for body paper |
| CN105239445A (en) * | 2015-09-02 | 2016-01-13 | 浙江惠同新材料股份有限公司 | Raw paper of crepe paper and production method thereof |
| CN105568746A (en) * | 2015-12-16 | 2016-05-11 | 重庆龙璟纸业有限公司 | Body paper of wettable tissues and production process of body paper |
| CN106930137A (en) * | 2015-12-29 | 2017-07-07 | 上海东冠纸业有限公司 | A kind of preparation method of the napkin paper for improving deflection |
| CN107313283A (en) * | 2016-04-27 | 2017-11-03 | 上海东冠纸业有限公司 | A kind of preparation method of wettable water paper handkerchief |
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Application publication date: 20200522 |
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