CN101929088B - Waste paper pulping method - Google Patents
Waste paper pulping method Download PDFInfo
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- CN101929088B CN101929088B CN2009100877313A CN200910087731A CN101929088B CN 101929088 B CN101929088 B CN 101929088B CN 2009100877313 A CN2009100877313 A CN 2009100877313A CN 200910087731 A CN200910087731 A CN 200910087731A CN 101929088 B CN101929088 B CN 101929088B
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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 discloses a waste paper pulping method. Waste paper with wet strength is used as a raw material (such as kitchen wiping paper, paper towel, waste bank paper and the like) in the method. The waste paper with wet strength is treated and pulped by adopting the flows of oxidation treatment, concentration treatment, alkali extraction, scatting of a high-speed scatter, concentration treatment and washing, or oxidation treatment, concentration treatment, alkali extraction, concentration treatment, secondary oxidation treatment, concentration treatment, secondary alkali extraction, scatting of a high-speed scatter, concentration treatment and washing. The method has the advantages of compact and simple pulping flow, saved investment, low energy consumption, low production cost, low pollution, high production efficiency and strong environment friendliness; and the obtained pulp has high quality, can be used as an optional raw material of various high-grade papers, and has remarkable economic benefit and social benefit.
Description
Technical field
The present invention relates to a kind of waste paper pulping method in pulping and paper-making field.
Background technology
At present, the common mixed paper waste of no wet strength (like old and useless newspaper, waste and old paper in the office, waste and old corrugation boxboard etc.) pulping technique is comparatively ripe; But, for the waste paper that wet strength is arranged (being called for short wet strong waste paper), especially having the pulping and paper-making utilization of the waste paper of high wet strength, the pulping and paper-making industry is still felt simply helpless so far.As, still there is technical difficulty at present in the slurrying of waste and old tissue, waste and old kitchen cleansing tissue, waste and old bank-note paper etc.So the conventional treating method of wet strong waste paper is used as waste incineration or landfill exactly.Owing to contain a large amount of wet strength agents or each heavy metal species printing-ink in the wet strong waste paper, if the wet direct landfill of strong waste paper will rot through behind the certain hour, wherein noxious material will produce secondary pollution to local groundwater resources; Especially after the strong waste paper degraded of the various printing Wet that contain heavy metal element, its heavy metal ion will be diffused in the water body, polluted underground water and then can have fatal hidden danger effect to human body or livestock.In addition; If wet strong waste paper directly carries out burning disposal; The burning that then contains the wet strong waste paper of various wet strength agents and other auxiliary agent in a large number will produce multiple toxic gas or dust; Can cause severe contamination equally to air, toxic gas or dust can produce toxic action to biology after being dissolved into surface water equally.Therefore, the way of wet strong waste paper incineration or this pollution transportation of landfill is not the technology of effecting a permanent cure,
As everyone knows, China is a papermaking big country, and annual various paper and cardboard total output surpass 7,350 ten thousand tons, will be above 7,000 ten thousand tons for needing various fibre resources this year; But China also is the country of a forest reserves shortage, and the paper grade (stock) fibre resources is most deficient.For satisfying the papermaking demand, China needs waste paper and the primary wood pulp above 800 ten thousand ton of import more than 2,000 ten thousand tons year.Yet the raw materials for production of various wet strong waste paper all are the bast fiber of preciousness and superior in quality xylon usually, and these fibrous raw materials burn or landfill will be the greatest waste of resource.If this type of fibre resources can scientifically be utilized again; Can either stop landfill or burn this type of resource pollution on the environment; Can open up new fibre resources again, and then reduce of the dependence of China's paper industry, reduce the consumption of pulping bleaching resources such as water, electricity to primary slurry; The few forest reserves of protection China, thus social cost reduced.
Therefore; Only develop a kind of wet strong waste paper pulping method, the various wet strong waste paper science of carrying out are handled rationally utilized, can stop the secondary pollution and the pollution transportation of wet strong waste paper; And make full use of high-quality fibrous raw material resource, thereby reach the effect of not only taking stopgap measures but also effecting a permanent cure.
Summary of the invention
The present invention is directed to wet strong waste paper a kind of wet strong waste paper pulping method is provided.This method adopts oxidation processes-concentration-alkali extracting-high speed dispersing device to break up-concentration-washing; Or oxidation processes-concentration-alkali extracting-concentration-secondary oxidative treatments-concentration-secondary alkali extracting-high speed dispersing device breaks up-flow process of concentration-washing, and the waste paper with wet strength is handled slurrying.Whole slurrying flow process compactness is simple and direct, reduced investment, and energy consumption is little, and production cost is low, pollutes for a short time, and production efficiency is high, and environment friendly is strong, and gained stock quality height can be used as the feedstock candidate of various fine papers.
For reaching above purpose, the present invention adopts following technical scheme:
(1) the related various device of this pulping process is acidproof, alkaline-resisting, and the sludge proof material is processed;
(2) this pulping process at first adopts the processing of oxidation destruction that the waste paper with wet strength is handled, and used oxidizing chemical is a potassium peroxydisulfate, or hydrogen peroxide; Or hypochlorite, and used oxidation destruction container handling band self-poking arrangement, wherein oxidation destruction treatment conditions are: oxidizing chemical consumption 2～10%; Waste paper content 2～10%; Time 2～120min, 30～100 ℃ of temperature, pH1～4;
(3) the slurry concentration of this pulping process adopts concentrator to leach soup, leaches soup and destroys processing section through being used for oxidation behind supplementing water and the chemicals, and raw material over dry rate is more than or equal to 15% after concentrating;
(4) adopt the alkali extraction technique to handle through the raw material after concentrating, the used waste paper alkali of this pulping technique extracting treatment conditions are: NaOH is transferred pH11～13, waste paper content 2～10%, time 10～120min, 30～100 ℃ of temperature;
(5) adopt the high speed dispersing device to break up through the raw material after the alkali extracting processing, breaing up is that the band soup is directly broken up after the alkali extracting, requires the dispersing device rotating speed greater than 500 rev/mins, more than the time 1min;
(6) raw material after process high speed dispersing device is broken up and concentrated adopts clear water fully to wash, washing disposed slurry pH6～9;
(7) the wide slotted screen less than 0.35mm of slurry employing seam of the abundant washing of process, or aperture carries out Screening Treatment less than the hole sizer equipment of 0.5mm, wherein sifts out good slurry and is used for papermaking, and screening reject is got back to oxidation destruction processing section and handled with new raw material.
The related chemicals of above-mentioned pulping process is common chemical products; Different according to the employed wet strength agent kind of wet strength waste paper with wet each chemicals consumption of strong waste paper performance; And its pulping process can also adopt different slurrying flow processs; Can access the slurry of different performance at last, be suitable for the different product demand.
The invention has the advantages that: make full use of paper industry discarded wet strong industry, life waste paper (like kitchen cleansing tissue, tissue, waste and old bank-note paper etc.); Open up new fibre resources; Stop of the pollution of the landfill of the strong waste paper of various high humiditys to environment.
Embodiment
Adopting gained secondary stock of the present invention to be applicable to copies joining of multiple paper.Below in conjunction with embodiment the present invention is done a detailed description:
Embodiment 1
It is a kind of lavatory tissue that present embodiment adopts raw material.Raw material at first carries out oxidation processes, and condition is a potassium peroxydisulfate consumption 7%, concentration 4%, time 60min, 90 ℃ of temperature, pH2.5.Raw material is concentrated into concentration 20% through thickener after the oxidation processes, adopts alkali to carry out the alkali extracting then and handles, and condition is pH13,90 ℃ of temperature, time 40min.Raw material adopts fruit juice mixer directly to break up 3min after the alkali treatment, fully washs then through concentrated, and with clear water, carries out Screening Treatment again, slotted screen width 0.3mm, and the last good pulp fibres of gained is even, and good pulp yield is high.
Embodiment 2
It is a kind of wet strong kitchen cleansing tissue that present embodiment adopts raw material.Raw material adopts potassium peroxydisulfate and hydrogen peroxide to carry out oxidation processes, and condition is a potassium peroxydisulfate 5%, hydrogen peroxide 2%, waste paper content 3%, time 50min, 85 ℃ of temperature, pH2.Raw material is concentrated into concentration 26% through thickener after the oxidation processes, adopts alkali to carry out the alkali extracting then and handles, and condition is pH13,85 ℃ of temperature, time 50min.Raw material adopts fruit juice mixer directly to break up 5min after the alkali treatment, fully washs then through concentrated, and with clear water, carries out the Screening Treatment of 0.3mm slotted screen again, and the last good pulp fibres of gained is even, and good pulp yield is high, and screenings is few.
Embodiment 3
It is a kind of wet strong lavatory tissue that present embodiment adopts raw material.Raw material adopts hypochlorite to carry out oxygen harm reason, and condition is a hypochlorite 6%, waste paper content 5%, time 60min, 40 ℃ of temperature, pH2.Raw material is concentrated into concentration 22% through thickener after the oxidation processes, adopts alkali to carry out the alkali extracting then and handles, and condition is pH13,85 ℃ of temperature, time 50min.Raw material adopts fruit juice mixer directly to break up 5min after the alkali treatment, fully washs then through concentrated, and with clear water, carries out Screening Treatment again, and the last good pulp fibres of gained is even, and good pulp yield is high.
Embodiment 4
It is the industrial high wet strength paper of a kind of U.S. import that present embodiment adopts raw material.Raw material adopts potassium peroxydisulfate to carry out oxidation processes, and condition is a potassium peroxydisulfate consumption 7%, waste paper content 4%, time 60min, 90 ℃ of temperature, pH2.5.Raw material is concentrated into concentration 20% through thickener after the oxidation processes, adopts alkali to carry out the alkali extracting then and handles, and condition is pH13,90 ℃ of temperature, time 40min.Be concentrated into 20% after the alkali treatment, raw material carries out secondary oxidation and destroys processing, and condition is a potassium peroxydisulfate consumption 5.5%, waste paper content 3%, time 30min, 85 ℃ of temperature, pH2.5.Oxidation destroys raw materials treated and is concentrated into concentration 20% through thickener, adopts alkali to carry out the alkali extracting then and handles, and condition is pH12.5,85 ℃ of temperature, time 30min.Raw material adopts fruit juice mixer directly to break up 3min after the alkali treatment, fully washs then through concentrated, and with clear water, carries out the Screening Treatment of 0.3mm slotted screen again, and the last good pulp fibres of gained is even, and good pulp yield is higher.
Can know from embodiment 1, embodiment 2, embodiment 3 and embodiment 4, adopt this pulping process that wet strong waste paper is carried out slurrying gained pulp yield height.This pulping process makes full use of discarded papermaking resource simultaneously, has expanded the paper grade (stock) fibrous raw material, has reduced because burning or such raw material of landfill to the pollution of environment, are realized economic benefit and environmental benefit doulbe-sides' victory.
Claims (6)
1. waste paper pulping method; It is characterized in that adopting oxidation processes-concentration-alkali extracting-high speed dispersing device to break up-concentration-washing; Or oxidation processes-concentration-alkali extracting-concentration-secondary oxidative treatments-concentration-secondary alkali extracting-high speed dispersing device breaks up-flow process of concentration-washing, and the waste paper with wet strength is handled slurrying; Wherein the oxidation processes condition is an oxidizing chemical consumption 2～10%, waste paper content 2～10%, time 2～120min, 30～100 ℃ of temperature, pH1～4; Alkali extracting condition is that NaOH is transferred pH11～13, waste paper content 2～10%, time 10～120min, 30～100 ℃ of temperature.
2. a kind of waste paper pulping method as claimed in claim 1 is characterized in that employed various device is acid and alkali-resistance, the resistance to oxidation material.
3. a kind of waste paper pulping method as claimed in claim 1 is characterized in that the oxidation processes chemicals is a potassium peroxydisulfate, or hydrogen peroxide, or hypochlorite, and oxidation processes container band self-poking arrangement.
4. a kind of waste paper pulping method as claimed in claim 1 is characterized in that concentration adopts concentrator to leach soup and makes raw material over dry rate more than or equal to 15%.
5. a kind of waste paper pulping method as claimed in claim 1, it is characterized in that the high speed dispersing device break up for after the alkali extracting band soup directly break up, the dispersing device rotating speed is greater than 500 rev/mins, the time is greater than 1min.
6. a kind of waste paper pulping method as claimed in claim 1; It is characterized in that washing employing clear water is to fully washing through breaing up concentrated slurry; Washing disposed slurry pH6～9; And adopt the wide slotted screen of seam, or the aperture is carried out Screening Treatment less than the hole sizer of 0.5mm to cleaning slurry less than 0.35mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100877313A CN101929088B (en) | 2009-06-24 | 2009-06-24 | Waste paper pulping method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100877313A CN101929088B (en) | 2009-06-24 | 2009-06-24 | Waste paper pulping method |
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| CN101929088A CN101929088A (en) | 2010-12-29 |
| CN101929088B true CN101929088B (en) | 2012-05-30 |
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| CN2009100877313A Active CN101929088B (en) | 2009-06-24 | 2009-06-24 | Waste paper pulping method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102677514A (en) * | 2012-05-08 | 2012-09-19 | 陕西科技大学 | Re-pulping method for high wet strength waste paper containing PAE resin |
| CN103526629B (en) * | 2013-10-23 | 2014-12-31 | 齐鲁工业大学 | Pulping process of waste paper with high wet strength |
| CN105648818B (en) * | 2014-07-21 | 2017-08-04 | 江苏金沃机械有限公司 | The wet strong waste paper recycling pulping process of a kind of pair of pH value |
| CN107022916A (en) * | 2017-05-25 | 2017-08-08 | 江苏美灯纸业有限公司 | A kind of waste paper currency system paste-making method |
| CN107090731B (en) * | 2017-05-25 | 2019-01-08 | 江苏美灯纸业有限公司 | A kind of waste beer mark mashing preprocess method |
| CN110409212B (en) * | 2019-07-19 | 2021-09-03 | 王洲 | Sandwich type hand towel and production process thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1179189A (en) * | 1995-02-21 | 1998-04-15 | 达纳·L·沃森 | System and method for recycling materials |
| CN1285854A (en) * | 1997-12-31 | 2001-02-28 | 赫尔克里士公司 | Process of repulping wet strenlgth paper |
| CN1598128A (en) * | 2004-08-13 | 2005-03-23 | 淄博市新材料研究所 | Wet intensity waste paper regereting agent |
-
2009
- 2009-06-24 CN CN2009100877313A patent/CN101929088B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1179189A (en) * | 1995-02-21 | 1998-04-15 | 达纳·L·沃森 | System and method for recycling materials |
| CN1285854A (en) * | 1997-12-31 | 2001-02-28 | 赫尔克里士公司 | Process of repulping wet strenlgth paper |
| CN1598128A (en) * | 2004-08-13 | 2005-03-23 | 淄博市新材料研究所 | Wet intensity waste paper regereting agent |
Non-Patent Citations (1)
| Title |
|---|
| JP特表平8-507836A 1996.08.20 |
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| CN101929088A (en) | 2010-12-29 |
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Address after: 100102, Beijing Wangjing science and Technology Park, Chaoyang District No. 4 Yang Lu, No. 302 light building, room 3 Patentee after: China National Pulp & Paper Research Institute Address before: 100032 Beijing city Chongwen District No. 7 South off the 5 floor of the Warwick International Apartments room 1510 Patentee before: China National Pulp & Paper Research Institute |
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Address after: 100102, Beijing Wangjing science and Technology Park, Chaoyang District No. 4 Yang Lu, No. 302 light building, room 3 Patentee after: China pulp and Paper Research Institute Co., Ltd. Address before: 100102, Beijing Wangjing science and Technology Park, Chaoyang District No. 4 Yang Lu, No. 302 light building, room 3 Patentee before: China National Pulp & Paper Research Institute |
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