CN103669067B - Floatation process after enzymatic deinking - Google Patents
Floatation process after enzymatic deinking Download PDFInfo
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- CN103669067B CN103669067B CN201210326103.8A CN201210326103A CN103669067B CN 103669067 B CN103669067 B CN 103669067B CN 201210326103 A CN201210326103 A CN 201210326103A CN 103669067 B CN103669067 B CN 103669067B
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- flotation
- floatation
- auxiliary agent
- ink removing
- deinking
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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 floatation process after a kind of enzymatic deinking, described technique comprises pulping, one section of flotation, dehydration washing, bis flotation, washing step, in bis flotation step, especially add the environmentally friendly rear floatation and ink removing auxiliary agent be made up of MES 45 ~ 55%, polyoxyethylene sorbitan fatty acid ester 35 ~ 45% and propylene glycol 10 ~ 15%.By the way, present invention process, while guarantee floatation system foam number and effective discharge rate, improves the washing function in rear floatation and ink removing, reaches good deinking efficiency, reduce and produce load; Make the concentrated and screening cleansing phase eliminating at polydisc of more how small ink particle simultaneously, prevent small ink particle in the agglomeration of back segment operation, Improving The Quality of Products.
Description
Technical field
The present invention relates to pulp technology for making paper, particularly relate to floatation process after a kind of enzymatic deinking.
Background technology
Biology enzyme reclaims in deinking process at waste paper, and application more all adopts the mode of flotation to carry out deinking.Biology enzyme and deinking auxiliary agent with the use of, biology enzyme is separated ink particle in pulping process, and deinking auxiliary agent is all generally surfactant component, in the process of flotation, mainly increase its frothing capacity, increase the discharge rate of whole system, thus take ink particle out of.What existing most enzymatic deinking technique adopted is the mode directly deinking auxiliary agent being added pulping section, but along with the extension of technological process, deinking auxiliary agent, after the techniques such as leading portion flotation, purification, dehydration, runs off serious, causes back segment floatation and ink removing efficiency to reduce.Existing biology enzyme floatation and ink removing line has the flotation of two sections or three sections, general meeting supplements a certain amount of deinking auxiliary agent in the flotation of two sections or three sections, reduce the phenomenon of the loss of the deinking auxiliary agent that the techniques such as leading portion flotation, purification, dehydration cause, the minimizing of foaming discharge rate, but existing technique generally adds a large amount of surfactant-based deinking auxiliary agents of not easily degrading in rear flotation.Because in leading portion flotation, some large ink particles are sized or get rid of, the ink particle that in rear floatation process, size is less accounts for greatly, the ink particle that this part size is less is difficult to thoroughly be got rid of by traditional interpolation exhibiting high surface activating agent class deinking auxiliary agent flotation, need to discharge whole system by aided processes such as concentrated, washings, reach the object of purification; And a large amount of surfactant-based deinking auxiliary agents of not easily degrading not only pollutes the environment, but also can cause froth breaking difficulty, flotation unit liquid level is on the low side, slurry through amount decline, produce load strengthen, be unfavorable for produce carry out long-term effectively.
Summary of the invention
The technical problem that the present invention mainly solves is to provide floatation process after a kind of enzymatic deinking, described technique is while guarantee floatation system foam number and effective discharge rate, improve the washing function in rear floatation and ink removing, reach good deinking efficiency, reduce and produce load; Make the concentrated and screening cleansing phase eliminating at polydisc of more how small ink particle simultaneously, prevent small ink particle in the agglomeration of back segment operation, Improving The Quality of Products.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide floatation process after a kind of enzymatic deinking, described technique comprises the following steps:
(1) pulping: waste paper and water are joined in pulper, the front floatation and ink removing auxiliary agent of waste paper weight described in the lipase, at least 0.01% simultaneously adding waste paper weight described at least 0.01%, beating time is 15 ~ 25min, size degradation temperature is 35 ~ 65 DEG C, obtains the paper pulp starching dense 10 ~ 18%;
(2) one sections of flotation: described paper pulp is joined in flotation cell, be diluted to slurry dense 0.6 ~ 1.5% to described paper pulp, the throughput of described flotation cell is 25 ~ 35L/h, pressure is 0.3 ~ 1MPa, and flotation time is 10 ~ 20min;
(3) dehydration washing: 100 order gauzes put into by the slurry after one section of flotation, rotates 5 ~ 10min in dewater unit high speed, rotating speed 800 ~ 1000 revs/min, and after control dehydration, pulp density is 15 ~ 20%;
(4) bis flotation: the rear floatation and ink removing auxiliary agent adding the rear oven dry stock weight of at least 0.01% dehydration washing in the slurry after dehydration washing, bis flotation is carried out again after dilution, the throughput of described flotation cell is 25 ~ 35L/h, pressure is 0.3 ~ 1MPa, and flotation time is 5 ~ 10min; Wherein, by weight, described rear floatation and ink removing auxiliary agent is made up of MES 45 ~ 55%, polyoxyethylene sorbitan fatty acid ester 35 ~ 45% and propylene glycol 10 ~ 15%;
(5) wash: the slurry after bis flotation is diluted further and washs with copper mesh;
Above concentration is with bone-dry paper gauge.
Wherein, described rear floatation and ink removing auxiliary agent preferable range is 0.01 ~ 0.02% of oven dry stock weight after described dehydration washing.
Wherein, the polyoxyethylated polymerized unit number of described polyoxyethylene sorbitan fatty acid ester is 40 ~ 80.
Wherein, described front floatation and ink removing auxiliary agent is Octylphenol polyoxyethylene ether, and the preferable range of described front floatation and ink removing auxiliary agent is 0.01 ~ 0.03% of described waste paper weight.
Wherein, the polymerized unit number of the polyoxyethylene ether of described Octylphenol polyoxyethylene ether is 80 ~ 100.
Wherein, the preferable range of described lipase is 0.01 ~ 0.03% of described waste paper weight.
The invention has the beneficial effects as follows: after being different from existing enzymatic deinking, in floatation process, add the froth breaking difficulty that a large amount of surfactant-based deinking auxiliary agent of not easily degrading causes, flotation unit liquid level is on the low side, slurry through amount declines, production load strengthens, be unfavorable for producing and carry out long-term effectively, the situation of contaminated environment, present invention process adds by MES 45 ~ 55% in the secondary flotation stage, the environmentally friendly deinking auxiliary agent that polyoxyethylene sorbitan fatty acid ester 35 ~ 45% and propylene glycol 10 ~ 15% form, while guarantee floatation system foam number and effective discharge rate, improve the washing function in rear floatation and ink removing, reach good deinking efficiency, reduce and produce load, make the concentrated and screening cleansing phase eliminating at polydisc of more how small ink particle simultaneously, prevent small ink particle in the agglomeration of back segment operation, Improving The Quality of Products.
Accompanying drawing explanation
Fig. 1 is flotation process figure after enzymatic deinking of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail.
After enzymatic deinking of the present invention, flotation process refers to Fig. 1.
(1) pulping: waste paper and water are joined in pulper, the front floatation and ink removing auxiliary agent of waste paper weight described in the lipase, at least 0.01% simultaneously adding waste paper weight described at least 0.01%, beating time is 15 ~ 25min, size degradation temperature is 35 ~ 65 DEG C, obtains the paper pulp starching dense 10 ~ 18%;
(2) one sections of flotation: described paper pulp is joined in flotation cell, be diluted to slurry dense 0.6 ~ 1.5% to described paper pulp, the throughput of described flotation cell is 25 ~ 35L/h, pressure is 0.3 ~ 1MPa, and flotation time is 10 ~ 20min;
(3) dehydration washing: 100 order gauzes put into by the slurry after one section of flotation, rotates 5 ~ 10min in dewater unit high speed, rotating speed 800 ~ 1000 revs/min, and after control dehydration, pulp density is 15 ~ 20%;
(4) bis flotation: the rear floatation and ink removing auxiliary agent adding the rear oven dry stock weight of at least 0.01% dehydration washing in the slurry after dehydration washing, bis flotation is carried out again after dilution, the throughput of described flotation cell is 25 ~ 35L/h, pressure is 0.3 ~ 1MPa, and flotation time is 5 ~ 10min; Wherein, by weight, described rear floatation and ink removing auxiliary agent is made up of MES 45 ~ 55%, polyoxyethylene sorbitan fatty acid ester 35 ~ 45% and propylene glycol 10 ~ 15%;
(5) wash: the slurry after bis flotation is diluted further and washs with copper mesh;
Above concentration is with bone-dry paper gauge.
Embodiment 1
(1) pulping: 200g waste paper (100% newsprint) and water are joined in pulper, add 0.02g lipase, 0.02g octylphenolpolyoxyethylene (80) ether simultaneously, beating time is 15min, and size degradation temperature is 35 DEG C, obtains the paper pulp starching dense 10%;
(2) one sections of flotation: described paper pulp is joined in flotation cell, be diluted to slurry dense 0.6% to described paper pulp, the throughput of described flotation cell is 25L/h, pressure is 0.3MPa, and flotation time is 10min;
(3) dehydration washing: 100 order gauzes put into by the slurry after one section of flotation, rotates 5min in dewater unit high speed, rotating speed 800 revs/min, and after control dehydration, pulp density is 15%;
(4) bis flotation: the rear floatation and ink removing auxiliary agent adding the rear oven dry stock weight of 0.01% dehydration washing in the slurry after dehydration washing, bis flotation is carried out again after dilution, the throughput of described flotation cell is 25L/h, pressure is 0.3MPa, and flotation time is 5min; Wherein, by weight, rear floatation and ink removing auxiliary agent is made up of MES 45%, polyoxyethylene (40) sorbitan fatty acid ester 45% and propylene glycol 10%.
(5) wash: the slurry after bis flotation is diluted further and washs with copper mesh;
Above concentration is with bone-dry paper gauge.
Collect slurry, respectively handsheet (quantitative 200g/m on standard sheet forming apparatus before and after deinking flotation
2), measure whiteness, dirt count, ink residual volume, whiteness and residual ink concentration (ERIC) adopt Tech2nidyneColorTouch [Eric950] to measure; Dirt count adopts South China Science & Engineering University's Autospec system that develops software to measure by TAPPI standard.
Embodiment 2
(1) pulping: 200g waste paper (80% office+20% books) and water are joined in pulper, add 0.06g lipase, 0.06g octylphenolpolyoxyethylene (100) ether simultaneously, beating time is 25min, size degradation temperature is 65 DEG C, obtains the paper pulp starching dense 18%;
(2) one sections of flotation: described paper pulp is joined in flotation cell, be diluted to slurry dense 1.5% to described paper pulp, the throughput of described flotation cell is 35L/h, pressure is 1MPa, and flotation time is 20min;
(3) dehydration washing: 100 order gauzes put into by the slurry after one section of flotation, rotates 10min in dewater unit high speed, rotating speed 1000 revs/min, and after control dehydration, pulp density is 20%;
(4) bis flotation: the rear floatation and ink removing auxiliary agent adding the rear oven dry stock weight of 0.02% dehydration washing in the slurry after dehydration washing, bis flotation is carried out again after dilution, the throughput of described flotation cell is 35L/h, pressure is 1MPa, and flotation time is 10min; Wherein, by weight, described rear floatation and ink removing auxiliary agent is made up of MES 55%, polyoxyethylene (80) sorbitan fatty acid ester 35% and propylene glycol 10%;
(5) wash: the slurry after bis flotation is diluted further and washs with copper mesh;
Above concentration is with bone-dry paper gauge.
Collect slurry, respectively handsheet (quantitative 200g/m on standard sheet forming apparatus before and after deinking flotation
2), measure whiteness, dirt count, ink residual volume, whiteness and residual ink concentration (ERIC) adopt Tech2nidyneColorTouch [Eric950] to measure; Dirt count adopts South China Science & Engineering University's Autospec system that develops software to measure by TAPPI standard.
Comparative example 1
Bis flotation does not add rear floatation and ink removing auxiliary agent, and other conditions are identical with embodiment 1 with step.
Collect slurry, respectively handsheet (quantitative 200g/m on standard sheet forming apparatus before and after deinking flotation
2), measure whiteness, dirt count, ink residual volume, whiteness and residual ink concentration (ERIC) adopt Tech2nidyneColorTouch [Eric950] to measure; Dirt count adopts South China Science & Engineering University's Autospec system that develops software to measure by TAPPI standard.
Comparison array 2
Bis flotation does not add rear floatation and ink removing auxiliary agent, and other conditions are identical with embodiment 2 with step.
Collect slurry, respectively handsheet (quantitative 200g/m on standard sheet forming apparatus before and after deinking flotation
2), measure whiteness, dirt count, ink residual volume, whiteness and residual ink concentration (ERIC) adopt Tech2nidyneColorTouch [Eric950] to measure; Dirt count adopts South China Science & Engineering University's Autospec system that develops software to measure by TAPPI standard.
Bis flotation adds the deinking that rear floatation and ink removing auxiliary agent and bis flotation do not add rear floatation and ink removing auxiliary agent and the results are shown in Table 1.
Table 1 deinking result
As shown in Table 1, bis flotation adds compared with rear floatation and ink removing auxiliary agent do not add rear floatation and ink removing auxiliary agent with bis flotation, whiteness improvement value improves 2.4%ISO, 0.8%ISO respectively, dust removal effect improves 12.54%, 4.47% respectively, ink removal effect improves 13.89%, 9.15% respectively, and deinking efficiency is obviously promoted.
Although the specific embodiment of the present invention has obtained detailed description, it will be understood to those of skill in the art that can carry out various amendment and replacement to those details, these change all within protection scope of the present invention according to disclosed all instructions.Four corner of the present invention is provided by claims and any equivalent thereof.
Claims (4)
1. a floatation process after enzymatic deinking, is characterized in that, said method comprising the steps of:
(1) pulping: waste paper and water are joined in pulper, add the front floatation and ink removing auxiliary agent of waste paper weight described in the lipase of waste paper weight described at least 0.01%, 0.01% ~ 0.03% simultaneously, beating time is 15 ~ 25min, size degradation temperature is 35 ~ 65 DEG C, obtains the paper pulp starching dense 10 ~ 18%;
(2) one sections of flotation: described paper pulp is joined in flotation cell, be diluted to slurry dense 0.6 ~ 1.5% to described paper pulp, the throughput of described flotation cell is 25 ~ 35L/h, pressure is 0.3 ~ 1MPa, and flotation time is 10 ~ 20min;
(3) dehydration washing: 100 order gauzes put into by the slurry after one section of flotation, rotates 5 ~ 10min in dewater unit high speed, rotating speed 800 ~ 1000 revs/min, and after control dehydration, pulp density is 15 ~ 20%;
(4) bis flotation: the rear floatation and ink removing auxiliary agent adding the rear oven dry stock weight of at least 0.01% dehydration washing in the slurry after dehydration washing, bis flotation is carried out again after dilution, the throughput of described flotation cell is 25 ~ 35L/h, pressure is 0.3 ~ 1MPa, and flotation time is 5 ~ 10min; Wherein, by weight, described rear floatation and ink removing auxiliary agent is made up of MES 45 ~ 55%, polyoxyethylene sorbitan fatty acid ester 35 ~ 45% and propylene glycol 10 ~ 15%;
(5) wash: the slurry after bis flotation is diluted further and washs with copper mesh;
Above concentration is with bone-dry paper gauge; Described front floatation and ink removing auxiliary agent is the polymerized unit number of polyoxyethylene ether is the Octylphenol polyoxyethylene ether of 80 ~ 100.
2. floatation process after enzymatic deinking as claimed in claim 1, is characterized in that, described rear floatation and ink removing auxiliary agent preferable range is 0.01 ~ 0.02% of oven dry stock weight after described dehydration washing.
3. floatation process after enzymatic deinking as claimed in claim 2, it is characterized in that, the polyoxyethylated polymerized unit number of described polyoxyethylene sorbitan fatty acid ester is 40 ~ 80.
4. floatation process after the enzymatic deinking as described in any one of claims 1 to 3, is characterized in that, the preferable range of described lipase is 0.01 ~ 0.03% of described waste paper weight.
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| CN201210326103.8A CN103669067B (en) | 2012-09-05 | 2012-09-05 | Floatation process after enzymatic deinking |
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| CN201210326103.8A CN103669067B (en) | 2012-09-05 | 2012-09-05 | Floatation process after enzymatic deinking |
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| CN103669067B true CN103669067B (en) | 2015-11-25 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1563567A (en) * | 2004-04-08 | 2005-01-12 | 山东轻工业学院 | Deinking Technique for news bogus paper through enzyme |
| CN1648331A (en) * | 2004-11-24 | 2005-08-03 | 深圳市绿微康生物工程有限公司 | New process for lipase waste paper deinking |
| CN101725069A (en) * | 2009-10-31 | 2010-06-09 | 华南理工大学 | Method for improving removal effect of ink in waste paper pulp |
| CN102517949A (en) * | 2011-12-08 | 2012-06-27 | 东莞市绿微康生物科技有限公司 | Environmentally friendly waste paper deinking method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6426200B1 (en) * | 1994-09-15 | 2002-07-30 | University Of Georgia Research Foundation, Inc. | Methods for enzymatic deinking of waste paper |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1563567A (en) * | 2004-04-08 | 2005-01-12 | 山东轻工业学院 | Deinking Technique for news bogus paper through enzyme |
| CN1648331A (en) * | 2004-11-24 | 2005-08-03 | 深圳市绿微康生物工程有限公司 | New process for lipase waste paper deinking |
| CN101725069A (en) * | 2009-10-31 | 2010-06-09 | 华南理工大学 | Method for improving removal effect of ink in waste paper pulp |
| CN102517949A (en) * | 2011-12-08 | 2012-06-27 | 东莞市绿微康生物科技有限公司 | Environmentally friendly waste paper deinking method |
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Effective date of registration: 20170626 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. |