CN103898791A - Wet strength waste paper repulping process - Google Patents
Wet strength waste paper repulping process Download PDFInfo
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- CN103898791A CN103898791A CN201210567041.XA CN201210567041A CN103898791A CN 103898791 A CN103898791 A CN 103898791A CN 201210567041 A CN201210567041 A CN 201210567041A CN 103898791 A CN103898791 A CN 103898791A
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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
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Abstract
The invention relates to a wet strength waste paper repulping process, and belongs to the technical field of papermaking. The repulping process is a novel three-stage composite process,which includes the steps of: 1, a surfactant osmotic hydration stage (adding 0.1-1% surfactant, and soaking for 15 to 30 min); 2, an acidic pulping stage (adding 1.0-3.5% of aluminum sulfate with pH value of 4.5-6.5, pulp concentration of 5-10%); and 3, an alkaline pulping stage (pH of 8-10,and pulp concentration of 5-30%). The process has the advantages of mild conditions, low energy consumption, low cost, good dispersion of fiber and good pulp quality, and is applicable to repulping of a variety of wet strength waste paper.
Description
Technical field
The present invention relates to a kind of wet strong waste paper pulping process again, is the wet strong waste paper recycling waste paper used production technology of slurrying again in pulping process again.
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Background technology
Along with the development of paper industry, social to paper kind expanded demand, the shortage of paper making raw material, waste paper more and more becomes the important sources of raw material of papermaking fiber, but the slurrying again of not all waste paper is all so easy.Various wet strength agents are widely used in paper industry, have obviously improved and improved the wet epistasis energy of paper, have expanded the range of application of paper kind, but simultaneously because the intensity of wet-strength paper is high, very difficult size degradation becomes paper pulp, bring very large difficulty to the reuse of slurrying again of wet-strength paper.Therefore pulping process is significant to wet-strength paper recycling again, to find a kind of efficiently wet strong waste paper.
At wet strong waste paper, again in slurrying recycling process, at present more is to use strong acid and strong oxidizer, but still has some problems.For example, Chinese patent CN1598128A discloses a kind of wet strong waste paper regenerated dose, it is characterized in that by hypochlorite and base-material with (9 ~ 1): 1 weight ratio batching is mixed and makes, wherein base-material be in persulfate, carbonate one or more arbitrary proportion mix, be dissolved in the running water of 20 ℃, then soak wet strong waste paper 2 hours, PH to 7.5, then through pulverizing, paper fibre is separated.But, because introducing hypochlorite, there is strong oxidizing property in this wet strong waste paper regenerated dose, can destroy the intensity of fiber, and chloride oxidant increases the weight of the pollution to environment because producing AOX.Also should not be used for the production of food hygiene paper.In addition, under strong alkaline condition, pull an oar, can make the problems such as brightness reversion appears in paper pulp, and dust is many, and drainability is poor.
Chinese patent CN101294360A discloses a kind of wet strength paper dissociation and degradation technique thereof, it is characterized in that: the auxiliary agent that dissociates used is mainly: the mixture of 5-8% penetrating agent JFC, 8-12% sulfuric acid, 8-12% aluminum sulfate, 2.5-5.0% zinc oxide etc.Due to the use of strong acid, the acidic hydrolysis of fiber causes the loss of pulp strength.In addition, although used JFC bleeding agent in this formula, contribute to the infiltration of the wetting and liquid of paper pulp fiber, but because the penetrating agent JFC that belongs to ethers molecular structure in this invention is pre-mixed into strong acid the Additives Products that dissociates, cause penetrating agent JFC to degrade and lost efficacy because of strong acid.
The wet strong Waste Paper Handling technique of application is many because there is above-mentioned defect at present, has greatly affected it and has applied.Therefore develop a kind for the treatment of conditions gentleness, low energy consumption, low cost, pulp quality is good, fiber dispersion is good treatment process has great importance to the recycling of wet strong waste paper.
Summary of the invention
The object of the present invention is to provide a kind of improved wet strong waste paper pulping process again., solve the series of problems such as the environmental pollution that brings with the wet strong waste paper of strong oxidizer and strong acid treatment, equipment corrosion, fiber degradation, strength damage.For this reason, the present invention proposes " collaborative dissociating " new ideas, and " infiltration swollen, chemical degradation, mechanical dispersion " the three kinds of effects that are about to organically combine., adopt and a kind ofly comprise that three sections of Combined Processing new technologies of surfactant infiltration aquation section, acid pulping section and alkalescence making beating section are as the pulping process again of wet strong waste paper.
According to above-mentioned design, the present invention adopts following technical scheme:
A kind of wet strong waste paper pulping process again, is characterized in that the slurrying again of wet strong waste paper adopts " three sections of composite treatment process " to complete, and concrete steps are as follows:
(1) surfactant infiltration aquation section: will treat that broken wet strong waste paper puts in pulper by the 5-10% of absolute dried paper pulp concentration, add water-soaked, add 0.1-1% to there is strong chemosmotic surfactant (stoste is calculated absolute dried paper pulp) simultaneously, then at room temperature soak 15-30 minute;
(2) acid pulping section: in the above-mentioned wet strength broke through pre-soaking processing, add the aluminum sulfate (in solid to absolute dried paper pulp) of 1.0-3.5%, and before adding, in advance aluminum sulfate is dissolved into the aqueous solution of 10% concentration, add complete, regulate pH value in the scope of 4.5-6.5, heat to 60 ℃-80 ℃, then, open hydrabrusher, pulping 15-30 minute;
(3) alkalescence making beating section: it is 8-10 that above-mentioned slurry pH value is adjusted to PH with NaoH, then adopts beating equipment, in the scope that is 5-30% at pulp density, then the 15-30 minute that pulls an oar, can be made into the good paper pulp of fiber dispersion.
Above-mentioned surfactant is in fatty alcohol-polyoxyethylene ether, succinate sodium sulfonate, sodium butylnaphthalenesulfonate, alkylphenol polyoxyethylene, fatty alcohol sulfate and alkyl phosphate, to choose any one kind of them or several;
Above-mentioned beating equipment is to choose any one kind of them in high density hydraulic pulper, deflaker, double plate mill and high-density paste mill.
The present invention and traditional wet strong waste paper compared with pulping process, have following substantial feature and advantage again:
1, there is good chemosmotic surfactant wet strong waste paper is carried out to preliminary treatment owing to having adopted, by the strong wetting and osmosis of surfactant, disintegrated to a great extent the wet strength forming due to the network coating function of wet strength agent, in order to dissociate under comparatively gentle condition, wet strong waste paper fibre is laid a good foundation;
2, because this three-stage process technique adopts under the solutions of weak acidity that pH value is 4.5-6.5 in acid pulping section, thereby avoided under strong acid condition because existing the acidic hydrolysis of paper pulp fiber to cause the problem of pulp strength loss;
3,, due in the alkalescence making beating stage, pH value is controlled at the weak basic condition of 8.0-10.0, thus the easy brightness reversion of the existing paper pulp of paper pulp of having avoided making under conventional highly basic condition, all the shortcoming such as dust is many, drainability is poor;
4, avoid the use of oxidizer containing chlorine due to this technique, reduced harm to human body and the pollution of environment.
The advantages such as three sections of New Process for Treatment that obviously, the present invention proposes have treatment conditions gentleness, low energy consumption, low cost, fiber dispersion is good, pulping is best in quality.
The specific embodiment
Embodiment mono-:
1. surfactant infiltration aquation section: will treat that broken wet strong waste paper puts in pulper by 5% of absolute dried paper pulp concentration, add water-soaked, add simultaneously 0.1% there is strong chemosmotic surfactant (stoste is calculated oven dry stock), then at room temperature soak 18 minutes; 2. acid pulping section: in the above-mentioned wet strength broke through pre-soaking processing, add 1.0% aluminum sulfate (in solid to absolute dried paper pulp), and before adding, in advance aluminum sulfate is dissolved into the aqueous solution of 10% concentration, add complete, regulating pH value is 4.5, heats to 60 ℃, then, open hydrabrusher, pulping 15 minutes; 3. alkalescence making beating section: it is 8 that above-mentioned slurry pH value is adjusted to PH with NaoH, then, adopts deflaker, is 5% left and right, then pulls an oar 15 minutes at pulp density, can be made into the good paper pulp of fiber dispersion.
Embodiment bis-:
1. surfactant infiltration aquation section: will treat that broken wet strong waste paper puts in pulper by 5% of absolute dried paper pulp concentration, add water-soaked, add simultaneously 0.2% there is strong chemosmotic surfactant (stoste is calculated oven dry stock), then at room temperature soak 15 minutes; 2. acid pulping section: in the above-mentioned wet strength broke through pre-soaking processing, add 1.5% aluminum sulfate (in solid to absolute dried paper pulp), and before adding, in advance aluminum sulfate is dissolved into the aqueous solution of 10% concentration, add complete, regulating pH value is 5.0, heats to 65 ℃, then, open hydrabrusher, pulping 20 minutes; 3. alkalescence making beating section: it is 8.5 that above-mentioned slurry pH value is adjusted to PH with NaoH, then, adopts high density hydraulic pulper, in the time that pulp density is 10%, then pulls an oar 20 minutes, can be made into the good paper pulp of fiber dispersion.
Embodiment tri-:
1. surfactant infiltration aquation section: will treat that broken wet strong waste paper puts in pulper by 7% of absolute dried paper pulp concentration, add water-soaked, add simultaneously 0.4% there is strong chemosmotic surfactant (stoste is calculated oven dry stock), then at room temperature soak 20 minutes; 2. acid pulping section: in the above-mentioned wet strength broke through pre-soaking processing, add 1.5% aluminum sulfate (in solid to absolute dried paper pulp), and before adding, in advance aluminum sulfate is dissolved into the aqueous solution of 10% concentration, add complete, regulating pH value is 5.5, heats to 70 ℃, then, open hydrabrusher, pulping 20 minutes; 3. alkalescence making beating section: it is 8.5 that above-mentioned slurry pH value is adjusted to PH with NaoH, then, adopts high-density paste mill, in the time that pulp density is 15%, then pulls an oar 20 minutes, can be made into the good paper pulp of fiber dispersion.
Embodiment tetra-:
1. surfactant infiltration aquation section: will treat that broken wet strong waste paper puts in pulper by 8% of absolute dried paper pulp concentration, add water-soaked, add simultaneously 0.6% there is strong chemosmotic surfactant (stoste is calculated oven dry stock), then at room temperature soak 20 minutes; 2. acid pulping section: in the above-mentioned wet strength broke through pre-soaking processing, add 2.5% aluminum sulfate (in solid to absolute dried paper pulp), and before adding, in advance aluminum sulfate is dissolved into the aqueous solution of 10% concentration, add complete, regulating pH value is 5.5, heats to 70 ℃, then, open hydrabrusher, pulping 25 minutes; 3. alkalescence making beating section: it is 9 that above-mentioned slurry pH value is adjusted to PH with NaoH, then, adopts two mills, is 10% left and right, then pulls an oar 25 minutes at pulp density, can be made into the good paper pulp of fiber dispersion.
Embodiment five:
1. surfactant infiltration aquation section: will treat that broken wet strong waste paper puts in pulper by 9% of absolute dried paper pulp concentration, add water-soaked, add simultaneously 0.8% there is strong chemosmotic surfactant (stoste is calculated oven dry stock), then at room temperature soak 25 minutes; 2. acid pulping section: in the above-mentioned wet strength broke through pre-soaking processing, add 3% aluminum sulfate (in solid to absolute dried paper pulp), and before adding, in advance aluminum sulfate is dissolved into the aqueous solution of 10% concentration, add complete, regulating pH value is 6.0, heats to 75 ℃, then, open hydrabrusher, pulping 30 minutes; 3. alkalescence making beating section: it is 9.5 that above-mentioned slurry pH value is adjusted to PH with NaoH, then, adopts high-density paste mill, in the time that pulp density is 25%, then pulls an oar 25 minutes, can be made into the good paper pulp of fiber dispersion.
Embodiment six:
1. surfactant infiltration aquation section: will treat that broken wet strong waste paper puts in pulper by 10% of absolute dried paper pulp concentration, add water-soaked, add simultaneously 1% there is strong chemosmotic surfactant (stoste is calculated oven dry stock), then at room temperature soak 30 minutes; 2. acid pulping section: in the above-mentioned wet strength broke through pre-soaking processing, add 3.5% aluminum sulfate (in solid to absolute dried paper pulp), and before adding, in advance aluminum sulfate is dissolved into the aqueous solution of 10% concentration, add complete, regulating pH value is 6.5, heats to 80 ℃, then, open hydrabrusher, pulping 30 minutes; 3. alkalescence making beating section: it is 10 that above-mentioned slurry pH value is adjusted to PH with NaoH, then, adopts high-density paste mill, is 30% left and right, then pulls an oar 30 minutes at pulp density, can be made into the good paper pulp of fiber dispersion.
Claims (3)
1. a wet strong waste paper pulping process again, is characterized in that this pulping process is three sections of Combined Processing new technologies that comprise " surfactant infiltration aquation section, acid pulping section and alkalescence making beating section ":
(1) surfactant infiltration aquation section: will treat that broken wet strong waste paper puts in pulper by the 5-10% of over dry slurrying concentration, add water-soaked, add 0.1-1% to there is strong chemosmotic surfactant (stoste is calculated oven dry stock) simultaneously, then at room temperature soak 15-30 minute;
(2) acid pulping section: in the above-mentioned wet strength broke through pre-soaking processing, add the aluminum sulfate (over dry broken being counted in solid) of 1.0-3.5%, and before adding, in advance aluminum sulfate is dissolved into the aqueous solution of 10% concentration, add complete, regulate pH value in the scope of 4.5-6.5, heat to 60 ℃-80 ℃, then, open hydrabrusher, pulping 15-30 minute;
(3) alkalescence making beating section: above-mentioned slurry pH value is adjusted in the scope that PH is 8-10 with NaoH, then adopts beating equipment, in the scope that is 5-30% at pulp density, then the 15-30 minute that pulls an oar, can be made into the good paper pulp of fiber dispersion.
2. wet strong waste paper pulping process more according to claim 1, is characterized in that described surfactant is in fatty alcohol-polyoxyethylene ether, succinate sodium sulfonate, sodium butylnaphthalenesulfonate, alkylphenol polyoxyethylene, fatty alcohol sulfate and alkyl phosphate, to choose any one kind of them or several.
3. wet strong waste paper pulping process more according to claim 1, is characterized in that described beating equipment is to choose any one kind of them in high density hydraulic pulper, deflaker, double plate mill and high-density paste mill.
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| CN201210567041.XA CN103898791A (en) | 2012-12-25 | 2012-12-25 | Wet strength waste paper repulping process |
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| CN201210567041.XA CN103898791A (en) | 2012-12-25 | 2012-12-25 | Wet strength waste paper repulping process |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104099795A (en) * | 2014-07-21 | 2014-10-15 | 江苏金沃机械有限公司 | Chemical mechanical pulping method for recycling of wet strength waste paper |
| CN104631180A (en) * | 2015-01-17 | 2015-05-20 | 江西省赣友高科实业有限公司 | Methods for preparing and using dissociation treatment agent for waste impregnated paper with wet-strength |
| CN105603794A (en) * | 2015-12-25 | 2016-05-25 | 广东华凯科技股份有限公司 | Latex fiberboard recycling and reusing method and recycling and disposal system applying same |
| CN108035190A (en) * | 2017-11-12 | 2018-05-15 | 福建省晋江优兰发纸业有限公司 | A kind of high humility waste paper manufactures reel copy paper method |
| CN108035184A (en) * | 2017-12-21 | 2018-05-15 | 淄博欧木特种纸业有限公司 | High-dimensional stability hanging raw stock and preparation method thereof |
| CN108316033A (en) * | 2018-03-23 | 2018-07-24 | 玖龙纸业（太仓）有限公司 | A kind of pulping system for high humidity waste and old boxboard by force |
| CN111809431A (en) * | 2020-06-06 | 2020-10-23 | 岳阳林纸股份有限公司 | Online recycling method for high-wet-strength broken paper |
| CN113957736A (en) * | 2021-10-26 | 2022-01-21 | 福建农林大学 | High-drainability wheat straw chemi-mechanical pulp and preparation method and application thereof based on acid catalysis |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104099795A (en) * | 2014-07-21 | 2014-10-15 | 江苏金沃机械有限公司 | Chemical mechanical pulping method for recycling of wet strength waste paper |
| CN104099795B (en) * | 2014-07-21 | 2016-06-29 | 江苏金沃机械有限公司 | A kind of wet strong waste paper recycling chemical mechanical pulp-making method |
| CN104631180A (en) * | 2015-01-17 | 2015-05-20 | 江西省赣友高科实业有限公司 | Methods for preparing and using dissociation treatment agent for waste impregnated paper with wet-strength |
| CN104631180B (en) * | 2015-01-17 | 2017-06-16 | 江西省赣友高科实业有限公司 | A kind of preparation method and its application method of useless wet strength paper dissociation inorganic agent |
| CN105603794A (en) * | 2015-12-25 | 2016-05-25 | 广东华凯科技股份有限公司 | Latex fiberboard recycling and reusing method and recycling and disposal system applying same |
| CN108035190A (en) * | 2017-11-12 | 2018-05-15 | 福建省晋江优兰发纸业有限公司 | A kind of high humility waste paper manufactures reel copy paper method |
| CN108035184A (en) * | 2017-12-21 | 2018-05-15 | 淄博欧木特种纸业有限公司 | High-dimensional stability hanging raw stock and preparation method thereof |
| CN108316033A (en) * | 2018-03-23 | 2018-07-24 | 玖龙纸业（太仓）有限公司 | A kind of pulping system for high humidity waste and old boxboard by force |
| CN111809431A (en) * | 2020-06-06 | 2020-10-23 | 岳阳林纸股份有限公司 | Online recycling method for high-wet-strength broken paper |
| CN113957736A (en) * | 2021-10-26 | 2022-01-21 | 福建农林大学 | High-drainability wheat straw chemi-mechanical pulp and preparation method and application thereof based on acid catalysis |
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