CN111809432A - Method for treating broken wet curtain paper - Google Patents
Method for treating broken wet curtain paper Download PDFInfo
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- CN111809432A CN111809432A CN202010509513.0A CN202010509513A CN111809432A CN 111809432 A CN111809432 A CN 111809432A CN 202010509513 A CN202010509513 A CN 202010509513A CN 111809432 A CN111809432 A CN 111809432A
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- pulp
- wet curtain
- paper
- broke
- curtain paper
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Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/02—Working-up waste paper
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/06—Alcohols; Phenols; Ethers; Aldehydes; Ketones; Acetals; Ketals
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/07—Nitrogen-containing compounds
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/12—Organo-metallic compounds
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/53—Polyethers; Polyesters
-
- 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
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/06—Paper forming aids
- D21H21/08—Dispersing agents for fibres
-
- 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
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
-
- 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
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/36—Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents
-
- 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 treating broken wet curtain paper, which belongs to the technical field of papermaking and comprises the following steps: step 1: uniformly putting broke and waste paper which are produced in production and stored for less than 24 hours into a pulper, adding water, opening a steam valve, heating to 80-85 ℃, and performing primary disintegration to obtain pulp; step 2: sending the pulp obtained after the treatment in the step 1 to a pulp storage pool, and pumping the pulp to a disc grinder for slight defibering until the pulp is completely disintegrated; and step 3: sending the pulp treated in the step 2 to a pulping machine, and adding a nonionic surfactant and an anionic surfactant; and 4, step 4: sending the pulp treated in the step 3 to a wet curtain paper production system for recycling, wherein the blending proportion is 12-20%; the method not only recovers pulping fibers, avoids the waste of fiber raw materials, but also does not influence the quality index of paper, and enhances the water absorption and the mildew resistance of wet curtain paper.
Description
Technical Field
The invention belongs to the technical field of papermaking, and particularly relates to a method for treating broken wet curtain paper.
Background
The wet curtain paper for the interlayer of the water-cooling air conditioner has high requirement on wet strength, and a large amount of wet strength agent is added during production, so that broken paper and waste paper produced in the production process are not well treated, obvious paper scraps are produced on the paper surface, and the appearance and the use of the wet curtain paper are influenced. The original broke treatment is carried out by a calendaring paper shredder at normal temperature, the treatment time is long, a plurality of paper sheets which are not disintegrated are provided, the waste of fiber raw materials is caused, and after the paper sheets are recycled, the paper sheets also have paper scraps which have poor appearance and influence the processing and use.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a method for treating broken wet curtain paper, which not only recycles pulping fibers, avoids fiber raw material waste, but also does not influence paper quality indexes, and enhances the water absorption and mildew resistance of the wet curtain paper.
In order to realize the purpose, the invention adopts the technical scheme that:
a method for treating broken wet curtain paper comprises the following steps:
step 1: uniformly putting broke and waste paper which are produced in production and stored for less than 24 hours into a pulper, adding water, opening a steam valve, heating to 80-85 ℃, and carrying out primary disintegration to obtain pulp, wherein the disintegration time is 2-2.5 hours, and the pulp concentration is 4-5%;
step 2: sending the pulp obtained after the treatment in the step 1 to a pulp storage pool, and pumping the pulp to a disc grinder for slight defibering until the pulp is completely disintegrated;
and step 3: sending the pulp treated in the step 2 to a pulping machine, adding a nonionic surfactant and an anionic surfactant, wherein the pulping concentration is 6-8%, and the pulping beating degree is 35-38 DEG SR;
and 4, step 4: and (3) delivering the pulp treated in the step (3) to a wet curtain paper production system for recycling, wherein the blending proportion is 12-20%.
Further, the broke and the waste paper are respectively broken paper, rewinding trimming broke and waste paper with unqualified quality generated in the production process of the wet curtain paper.
Preferably, in the step 1, a steam valve is opened, the mixture is heated to 82 ℃ for preliminary disintegration, so that the pulp is obtained, the disintegration time is 2.5 hours, and the pulp concentration is 4.3%.
Further, the nonionic surfactant in the step 3 is nonylphenol polyoxyethylene ether; the anionic surfactant is a naphthenate.
Further, adding nonylphenol polyoxyethylene ether in an amount which is 2-5% of the total mass of the slurry; the naphthenate accounts for 0.5-1.0% of the total mass of the slurry.
Preferably, the blending ratio in the step 4 is 13%.
Further, a compound containing hydroxyl groups is also added to the slurry before being sent to the system for reuse in step 4.
Further, the compound containing hydroxyl is one or a mixture of more of paeonol and hymexazol, and the mass ratio of the paeonol to the hymexazol is 0.5-0.8: 1 and mixing.
Further, the added mass of the hydroxyl group-containing compound accounts for 0.8-1.5% of the total mass of the slurry.
The invention has the beneficial effects that: (1) the method controls the concentration of the pulp to be 4-5% in the primary disintegrating process, accurately measures the addition of the broken paper, the waste paper and the water, is beneficial to fully wetting the broken paper and the waste paper, has good fluidity, ensures good kneading effect among fibers, is beneficial to dispersion, and prevents the fibers from being cut off and damaged; a steam pipe is additionally arranged during pulping, the temperature is controlled to be 80-85 ℃, so that the pulping temperature is increased, and the breaking of broken paper and waste paper is accelerated;
(2) according to the invention, when pulp is pulped, nonylphenol polyoxyethylene ether and naphthenate are added to serve as a nonionic surfactant and an anionic surfactant, wherein the nonionic surfactant is used for dispersing stickies contained in broke and waste paper, the oleophylic group of the nonylphenol polyoxyethylene ether is combined with the stickies in the pulping process, the stickies are dispersed into smaller particles, then the smaller particles are attached to the surface of pulp fibers through the hydrophilic group at the other end of the nonylphenol polyoxyethylene ether, and the nonionic surfactant and the anionic surfactant are subjected to synergistic action to cause the adsorption of nonionic surface activity, the hydrophilic group chain extends to the pulp, so that the hydrophilicity of the whole pulp is improved, and the water absorption of wet curtain paper is enhanced in the recycling process;
(3) according to the invention, the compound containing hydroxyl is added before the pulp is sent to a wet curtain paper production system for reuse, wherein paeonol is added into the pulp containing the nonionic surfactant and is wrapped by hydrophilic groups, the water solubility is improved, the solubility in water is more than or equal to 9.5g/L, and the antibacterial property of the produced wet curtain paper is improved by adding the compound containing hydroxyl, so that the mildew resistance is enhanced, the wet curtain paper can be used for a long time without generating peculiar smell;
(4) the invention provides a method for treating broken wet curtain paper, which not only recovers pulping fibers, avoids waste of fiber raw materials, but also does not influence the quality index of paper, and enhances the water absorption and the mildew resistance of the wet curtain paper.
Detailed Description
For a better understanding of the present invention, embodiments of the present invention are described in detail below with reference to examples, but those skilled in the art will understand that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention.
The broke and the waste paper in the examples and the comparative examples of the present invention are paper breakage, rewinding and trimming broke and waste paper with unqualified quality, respectively, generated in the production process of wet curtain paper.
Example 1:
a method for treating broken wet curtain paper comprises the following steps:
step 1: uniformly putting broke and waste paper which are produced in production and stored for less than 24 hours into a pulper, adding water, opening a steam valve, heating to 82 ℃, and carrying out primary disintegration to obtain pulp, wherein the disintegration time is 2.5 hours, and the pulp concentration is 4.3%;
step 2: sending the pulp obtained after the treatment in the step 1 to a pulp storage pool, and pumping the pulp to a disc grinder for slight defibering until the pulp is completely disintegrated;
and step 3: sending the pulp treated in the step 2 to a pulping machine, and then adding nonylphenol polyoxyethylene ether and naphthenate, wherein the pulping concentration is 6%, the pulping beating degree is 35 DEG SR, and the added mass of the nonylphenol polyoxyethylene ether accounts for 2% of the total mass of the pulp; the naphthenate accounts for 1.0 percent of the total mass of the slurry by mass;
and 4, step 4: and (3) delivering the pulp treated in the step (3) to a wet curtain paper production system for recycling, wherein the blending proportion is 13%, and 0.8% of paeonol is added into the pulp before the pulp is delivered to the system for recycling.
Example 2:
a method for treating broken wet curtain paper comprises the following steps:
step 1: uniformly putting broke and waste paper which are produced in production and stored for less than 24 hours into a pulper, adding water, opening a steam valve, heating to 80 ℃, and performing primary disintegration to obtain pulp, wherein the disintegration time is 2 hours, and the pulp concentration is 5%;
step 2: sending the pulp obtained after the treatment in the step 1 to a pulp storage pool, and pumping the pulp to a disc grinder for slight defibering until the pulp is completely disintegrated;
and step 3: sending the pulp treated in the step 2 to a pulping machine, and then adding nonylphenol polyoxyethylene ether and naphthenate, wherein the pulping concentration is 8%, the pulping beating degree is 38 DEG SR, and the added mass of the nonylphenol polyoxyethylene ether accounts for 5% of the total mass of the pulp; the naphthenate accounts for 0.5 percent of the total mass of the slurry by mass;
and 4, step 4: and (3) delivering the pulp treated in the step (3) to a wet curtain paper production system for recycling, wherein the blending proportion is 12%, and 1.5% of hymexazol is added into the pulp before the pulp is delivered to the system for recycling.
Example 3:
a method for treating broken wet curtain paper comprises the following steps:
step 1: uniformly putting broke and waste paper which are produced in production and stored for less than 24 hours into a pulper, adding water, opening a steam valve, heating to 85 ℃, and carrying out primary disintegration to obtain pulp, wherein the disintegration time is 2.2 hours, and the pulp concentration is 4%;
step 2: sending the pulp obtained after the treatment in the step 1 to a pulp storage pool, and pumping the pulp to a disc grinder for slight defibering until the pulp is completely disintegrated;
and step 3: sending the pulp treated in the step 2 to a pulping machine, and then adding nonylphenol polyoxyethylene ether and naphthenate, wherein the pulping concentration is 7%, the pulping beating degree is 36-degree SR, and the added mass of the nonylphenol polyoxyethylene ether accounts for 4% of the total mass of the pulp; the naphthenate accounts for 0.8 percent of the total mass of the slurry by mass;
and 4, step 4: and (3) delivering the pulp treated in the step (3) to a wet curtain paper production system for recycling, wherein the blending proportion is 20%, and 1.0% of paeonol is added into the pulp before the pulp is delivered to the system for recycling.
Comparative example 1:
comparative example 1 differs from the example in that step 3 is omitted in the treatment step and the remaining operation steps are unchanged.
Comparative example 2:
comparative example 2 is different from the examples in that the hydroxyl group-containing compound was not added in the treatment step 4, and the contents of the rest of the treatment were not changed.
Comparative example 3:
comparative example 3 is different from the examples in that step 3 is omitted in the treatment step, and the hydroxyl group-containing compound is not added in the treatment step 4, and the rest of the operation contents are unchanged.
Technical index detection is carried out on the wet curtain paper broke pulp material treated by the above examples and comparative examples and the recycled wet curtain paper, and the detection results are shown in table 1.
TABLE 1
The wet curtain paper produced in the above examples and comparative examples is tested for bacteriostatic performance, the specific test method refers to the bacteriostatic performance test method of C5 non-leachable bacteriostatic product in national standard GB 15979-.
TABLE 2
| The antibacterial rate is% | |
| Example 1 | 95 |
| Example 2 | 96 |
| Example 3 | 89 |
| Comparative example 1 | 87 |
| Comparative example 2 | 42 |
| Comparative example 3 | 45 |
As can be seen from tables 1 and 2, the method for treating the broken wet curtain paper recovers pulping fibers, avoids waste of fiber raw materials, and does not affect paper quality indexes, the HLB value of slurry obtained by treatment is higher due to the addition of the nonionic surfactant and the anionic surfactant, so that the hydrophilicity is good, the water absorption height of the prepared wet curtain paper is further improved, the water absorption of the wet curtain paper is enhanced, and the bacteriostasis rate of the wet curtain paper obtained in the embodiment is increased due to the addition of the hydroxyl-containing compound, so that the mildew resistance is enhanced, and the wet curtain paper can be used for a long time without generating peculiar smell.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments. Those skilled in the art should appreciate that many modifications and variations are possible in light of the above teaching without departing from the scope of the invention.
Claims (9)
1. A method for treating broken wet curtain paper is characterized by comprising the following steps:
step 1: uniformly putting broke and waste paper which are produced in production and stored for less than 24 hours into a pulper, adding water, opening a steam valve, heating to 80-85 ℃, and carrying out primary disintegration to obtain pulp, wherein the disintegration time is 2-2.5 hours, and the pulp concentration is 4-5%;
step 2: sending the pulp obtained after the treatment in the step 1 to a pulp storage pool, and pumping the pulp to a disc grinder for slight defibering until the pulp is completely disintegrated;
and step 3: sending the pulp treated in the step 2 to a pulping machine, adding a nonionic surfactant and an anionic surfactant, wherein the pulping concentration is 6-8%, and the pulping beating degree is 35-38 DEG SR;
and 4, step 4: and (3) delivering the pulp treated in the step (3) to a wet curtain paper production system for recycling, wherein the blending proportion is 12-20%.
2. The method for treating the wet curtain paper broke as claimed in claim 1, wherein the broke and the waste paper are paper breakage, rewinding and trimming broke and waste paper with unqualified quality generated in the production process of the wet curtain paper.
3. The method for treating wet curtain paper broke as claimed in claim 1, wherein the steam valve is opened in step 1, the wet curtain paper broke is heated to 82 ℃ for preliminary disintegration to obtain pulp, the disintegration time is 2.5h, and the pulp concentration is 4.3%.
4. The method for treating the wet curtain paper broke as claimed in claim 1, wherein the nonionic surfactant in the step 3 is nonylphenol polyoxyethylene ether; the anionic surfactant is a naphthenate.
5. The method for treating the wet curtain paper broke as claimed in claim 3, wherein the nonylphenol polyoxyethylene ether is added in an amount of 2-5% by mass based on the total mass of the pulp; the naphthenate accounts for 0.5-1.0% of the total mass of the slurry.
6. The method as claimed in claim 1, wherein the blending ratio in step 4 is 13%.
7. The method for treating wet curtain broke according to claim 1, wherein a hydroxyl containing compound is also added to the slurry before being sent to the system for reuse in step 4.
8. The method for treating the wet curtain paper broke as claimed in claim 6, wherein the compound containing hydroxyl is one or more of paeonol and hymexazol, and the mass ratio of the paeonol to the hymexazol is 0.5-0.8: 1 and mixing.
9. The method as claimed in claim 6, wherein the hydroxyl group-containing compound is added in an amount of 0.8-1.5% by weight based on the total weight of the pulp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010509513.0A CN111809432A (en) | 2020-06-06 | 2020-06-06 | Method for treating broken wet curtain paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010509513.0A CN111809432A (en) | 2020-06-06 | 2020-06-06 | Method for treating broken wet curtain paper |
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| Publication Number | Publication Date |
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| CN111809432A true CN111809432A (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010509513.0A Pending CN111809432A (en) | 2020-06-06 | 2020-06-06 | Method for treating broken wet curtain paper |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161846A (en) * | 2011-01-07 | 2011-08-24 | 华南理工大学 | Neutral flotation deinking agent and method of deinking waste newspaper thereof |
| CN102242510A (en) * | 2011-06-30 | 2011-11-16 | 德州泰鼎新材料科技有限公司 | Wet strength waste paper processing method |
| CN102718935A (en) * | 2012-07-09 | 2012-10-10 | 山东圣泉化工股份有限公司 | Preparation method of phenolic resin for wet curtain paper and preparation method of wet curtain paper |
| CN104099808A (en) * | 2014-07-08 | 2014-10-15 | 金东纸业（江苏）股份有限公司 | Treatment method for waste paper pulp and papermaking sizing material |
| CN108468251A (en) * | 2018-03-20 | 2018-08-31 | 南通悦能节能净化设备有限公司 | A kind of antibacterial wet curtain paper and preparation method thereof |
-
2020
- 2020-06-06 CN CN202010509513.0A patent/CN111809432A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161846A (en) * | 2011-01-07 | 2011-08-24 | 华南理工大学 | Neutral flotation deinking agent and method of deinking waste newspaper thereof |
| CN102242510A (en) * | 2011-06-30 | 2011-11-16 | 德州泰鼎新材料科技有限公司 | Wet strength waste paper processing method |
| CN102718935A (en) * | 2012-07-09 | 2012-10-10 | 山东圣泉化工股份有限公司 | Preparation method of phenolic resin for wet curtain paper and preparation method of wet curtain paper |
| CN104099808A (en) * | 2014-07-08 | 2014-10-15 | 金东纸业（江苏）股份有限公司 | Treatment method for waste paper pulp and papermaking sizing material |
| CN108468251A (en) * | 2018-03-20 | 2018-08-31 | 南通悦能节能净化设备有限公司 | A kind of antibacterial wet curtain paper and preparation method thereof |
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Application publication date: 20201023 |