CN1827915A - Hybrid penisetum NaOH-AQ method for pulp making, bleaching and paper forming - Google Patents
Hybrid penisetum NaOH-AQ method for pulp making, bleaching and paper forming Download PDFInfo
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- CN1827915A CN1827915A CN 200510051169 CN200510051169A CN1827915A CN 1827915 A CN1827915 A CN 1827915A CN 200510051169 CN200510051169 CN 200510051169 CN 200510051169 A CN200510051169 A CN 200510051169A CN 1827915 A CN1827915 A CN 1827915A
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Abstract
The invention discloses the method for making the product with crossing pennisetum alopecuroides NaOH-AQ method. The method uses crossing pennisetum alopecuroides as raw material, pulping, bleaching, and getting the product with paper machine. The method can solves the problem that the raw material is in short supply, reduce energy consumption and improve quality. The invention can be used for making laundry paper board and book and periodicals paper or double adhesive tape. The physical property indexes amount to the national standard. Compared with the 75% national standard, the white content of planograph book and periodicals paper is 88.77%.
Description
Technical field
The present invention relates to a kind of pulp and paper making method and products thereof, relating in particular to a kind of is the manufacture paper with pulp pulp and paper making method of offset paper and wood-free paper of raw material NaOH-AQ method pulping bleaching with the hybrid Chinese pennisetum.
Background technology
China's paper industry development in recent years is that rare consumption increases one of industry greater than production increase rapidly.China is the big country of non-wood fibrous raw material pulping and paper-making in the world, paper more than 70% that China produces and cardboard are to adopt non-wood fiber raw material, and it is with a long history to use papermaking straw pulp to have, technology maturation, production equipment is numerous, has brought into play important function for promoting paper industry.Along with the continuous increase of paper and paperboard production and consumption figure, supply pulp but all subtracts with day, depends on imported raw material in a large number, need use foreign currency every year hundred billion yuan, expends surprising.The paper making raw material imbalance between supply and demand is outstanding day by day, and especially based on the manufacturer of non-wood fiber raw material, ubiquity is purchased deficiencies such as radius is big, of poor quality, cost is high, the intensification degree is low.
In view of above reason, press for and improve and adjustment paper industry supply of raw material structure and supply.Therefore, need a kind of new paper making raw material of exploitation and pulp and paper making method thereof, both can widen raw material sources, can improve the quality of products again simultaneously, this reduces production costs to alleviating the paper making raw material short supply, satisfy the demands, increase benefit, save foreign exchange, promotion paper industry development etc. has important innovation meaning.
Hybrid Chinese pennisetum belongs to grass family perennial herb C
4Plant, vegetative propagation is triploid.Have advantages such as output height, easily kind is easily managed, low, the photosynthetic usefulness of cost is good.Under medium fertilizer and water condition, it is 300 tons～400 tons that per hectare is generally produced bright grass amount per year, and amounting to dry is 60 tons～80 tons, is described as the title of " world grass king " by numerous experts.Its well developed root system, aerial part does not have aerial root, and the hybrid Chinese pennisetum after improvement is optimized requires not tight to soil, be suitable for establishing in large scale and demonstration test success.
Hybrid Chinese pennisetum is widely used in feed owing to have higher nutritional labeling, and it makes the greenfeed of ox, sheep, mule, horse, deer, can take turns in year and cut 3～4 times; Do fish, rabbit etc. and hold the greenfeed of fowl, can take turns in year and cut 5～6 times; Except green grass or young crops is cut, but also hay curing or modulation greenfeed can also be used as the mixed feed of feed processing, the raw material of mixed fodder.At present, not extensive use as yet in field of papermaking, the inventor all succeeds through researching and analysing experimental result for many years, the a large amount of production of hybrid Chinese pennisetum is widely used in papermaking as fibrous raw material, can effectively alleviate the contradiction of paper making raw material shortage, and improve multinomial performance index such as paper tensile strength and be better than wheat straw, so finished the present invention.
Summary of the invention
Institute's technical solution problem
In order to overcome the deficiency of prior art, the object of the present invention is to provide a kind of is the manufacture paper with pulp pulp and paper making method of offset paper and wood-free paper of raw material NaOH-AQ method pulping bleaching with the hybrid Chinese pennisetum, this method can effectively be alleviated the contradiction of paper making raw material shortage, the paper whiteness can be improved, blowdown can also be reduced simultaneously.
Technical scheme
Specifically, purpose of the present invention can realize in the following way:
Pulp and paper making method of the present invention may further comprise the steps: be feedstock production paper pulp with the hybrid Chinese pennisetum; Association with pulp bleaching; Copy the product that gets made of paper through paper machine.
Wherein said hybrid Chinese pennisetum is to serve as maternal and napier grass N51 is the hybrid of male parent with American pennisetum alopecuroides Tift23A.Preferred described hybrid Chinese pennisetum likeness in form sugarcane, strain shape compactness, fibrous root prosperity, aerial part do not have aerial root; Plant is generally up to 3.5m～4.5m, and stooling is extremely strong, generally tillers more than 25 strains the long 13～18cm of joint, the long 90～150cm of leaf, the wide 3～5cm of leaf, the thick 2～4cm of stem; Be 150～180 days growth period, i.e. April～late October, be the summit of growth phase June～September, and per ten days jointing elongation is 40cm～60cm nearly, and per ten days increases progressively with the temperature increase; Hybrid Chinese pennisetum with fertile with 20kg/ mu nitrogenous fertilizer in conjunction with fertilizer all can, under the suitable situation of temperature, moisture, general cuttage was taken root in 7～10 days, 12～15 days upright seedlings, 15～20 days begin to tiller.The cane of described hybrid Chinese pennisetum, leaf and marrow all can be all as pulping raw materials.
The wherein said method for preparing paper pulp can be the conventional or known method in this area, for example can adopt the NaOH-AQ method.
Described preparation paper pulp also can adopt and get the raw materials ready and boiling.
Wherein said get the raw materials ready be with hybrid Chinese pennisetum cut into material section air-dry after, standby behind the equilibrium water conten.The preferred employing prescinds hybrid Chinese pennisetum root and keeps stem bar and part leaf behind head lobe slightly, after the material section that cutting is good is air-dry, it is standby behind the equilibrium water conten in the plastic bag to pack into, for example will cut into the long material section of 3-5cm with chipping machine, be spread out in the ground natural air drying after a few days, standby behind the equilibrium water conten in the plastic bag of the good airproof performance of packing into.
Described boiling can be adopted any commonly used or known boiling method of field of papermaking, also can adopt in multiple tank boiling vessel and electric heating revolution pot, dress pot amount is 80-120g over dry raw material/L, NaOH is 16%-24% to the consumption of over dry raw material, anthraquinone is 0.02%-0.05% to the consumption of over dry raw material, and liquor ratio is 1: 6-1: 8, and boiling temperature is 150-160 ℃, temperature retention time is 1.8-2.0h, carries out boiling.Establish the multiple tank boiling vessel of 8 cookers in for example can selecting for use, adopt glycerine as heat medium, preferably be 100g over dry raw material/L in dress pot amount, NaOH is 20% to the consumption of over dry raw material, anthraquinone is 0.05% to the consumption of over dry raw material, and liquor ratio is 1: 7, and boiling temperature is 150-160 ℃, temperature retention time is under the condition of 2h, carries out boiling.
Described association with pulp bleaching can adopt any commonly used or known method for bleaching of field of papermaking, and also can adopt is that the paper pulp after the screening is stored in after drainage, squeezing, wet pulp are dissociated in the plastic bag behind the equilibrium water conten, adds bleaching agent and bleaches.Wherein said screening for the slurry after the boiling after clean extracting, in the fiber card breaker, dissociate, make fiber dispersion after, at the enterprising row filter of vibrating screen.
Wherein, described bleaching agent can be any commonly used or known bleaching agent in this area, and for example hydrogen peroxide, hypochlorite, liquid chlorine, clorox etc. preferably adopt hypochlorite.
Described bleaching can be adopted single stage bleaching or two sections bleachings.
When adopting single stage bleaching, its effective chlorine consumption is 6-10%/L, and bleaching concentration is 5-7%, and bleaching temperature is 38 ℃-42 ℃, and bleaching time is 3h-5h hour.Preferred effective chlorine consumption is 8%/L, and concentration of slurry is 5%, and bleaching time is 5 hours.
When adopting two sections bleachings, the total consumption of its effective chlorine is 6-10%/L, and bleaching total time is 3-5 hour.The effective chlorine amount ratio of two sections bleachings is 6-8: 2.The preferred total consumption of effective chlorine is 8%/L, and bleaching total time is 5 hours.Two sections effective chlorine amount ratio is 6: 2, and two sections bleaching time ratios are 1: 1.
The bleached pulp of hybrid Chinese pennisetum can be directly used in paper machine and copy paper, also can join with other paper pulp and copy, and for example, can join with one of softwood pulp, poplar or reed bleached pulp of bleaching and copy the offset paper of manufacturing paper with pulp, wood-free paper or white board.
Described paper machine is copied paper can adopt any this area routine or known method and equipment, for example can copy on the paper device at the Rapid-Kothen that Germany produces and copy paper.
For improving the printing quality of the paper of copying, can also adopt the AKD neutral sizing agent to carry out neutral plasm-glue-blending, used filler can be precipitated calcium carbonate (PPC).In order to improve the retention of slurry, filler and sizing agent, can also in slurry system, add cationic starch (CS) and polyacrylamide (CPAM).
Beneficial effect
Adopting pulp and paper making method of the present invention, is raw material with the hybrid Chinese pennisetum, simple and easy to do, can solve the paper making raw material problem of shortage, can cut down the consumption of energy simultaneously, improves the quality.The inventive method can be used for the white board of manufacturing paper with pulp, also can be used for joining and copy offset paper or wood-free paper, its every physical performance index all is up to state standards, particularly the whiteness of offset paper has been issued to 88.77% in the situation of not adding dose, considerably beyond national standard be up to 75% requirement.
The specific embodiment
The present invention describes with the following example, but does not limit the present invention.
Embodiment 1:
(1) get the raw materials ready: hybrid Chinese pennisetum is prescinded root and keeps stem bar and part leaf slightly behind head lobe, cut into the long material section of 3-5cm air-dry after, standby behind the equilibrium water conten in the plastic bag of packing into;
(2) boiling: establish in the multiple tank boiling vessel of 8 cookers in the hybrid Chinese pennisetum material section of getting ready in the step (1) packed into, with glycerine as heat medium, be 100g over dry material/L in dress pot amount, the amount that adds NaOH is 18%, the anthraquinone consumption is 0.02%, and liquor ratio is 1: 6, and maximum temperature is 160 ℃, temperature retention time is under 2 hours the condition, to carry out boiling;
(3) bleaching: the slurry after the boiling is extracted through cleaning, in the fiber card breaker, dissociated 1-3 minute, make fiber dispersion, select the sieve plate of 0.3mm sieve seam for use, behind the enterprising row filter of the vibrating screen of Φ 300mm, equilibrium water conten, add clorox and carry out single stage bleaching, the clorox consumption is 8%, and bleaching concentration is 5%, and bleaching time is 5 hours;
(4) copy paper: the hybrid Chinese pennisetum paper pulp with bleaching is copied paper on paper machine, make the product white board.
Detect the national standard requirement that whiteness of bleaching and the physical performance index that becomes paper all meet white board according to the national standard condition.
Embodiment 2:
Identical with step among the embodiment 1, the amount that just adds NaOH in the step (2) is 20%, and the anthraquinone consumption is 0.05%, and liquor ratio is 1: 7, and maximum temperature is 160 ℃
After measured, every index of one-tenth paper all meets the national standard requirement of white board.Measurement result is as shown in table 1 below.
Table 1
| Bleached pulp | Brown stock | ||
| Beating degree/° SR quantitatively/g/m 2Tightness/g/cm 3Whiteness/% opacity/% fracture length/km | 37.0 62.6 0.73 74.57 72.83 6.03 | 54.0 63.3 0.78 28.18 - 7.93 | |
| Fibre length/mm | Number average length weighted average length two-fold length | 0.62 0.91 1.33 | 0.62 0.99 1.66 |
| 0.2mm following fiber fines percentage composition/% | Quantity weight | 49.36 11.01 | 45.52 9.40 |
Embodiment 3:
Identical with step among the embodiment 1, just two sections bleachings of the employing in step (3) substitute single stage bleaching, and the total consumption of effective chlorine is 10g/L, and bleaching total time is 5 hours.Two sections effective chlorine amount ratio is 6: 2, and two sections bleaching time ratio is 1: 1.
After measured, every index of one-tenth paper all meets the national standard requirement of white board.
Embodiment 4:
Identical with step among the embodiment 1, just step (4) is changed into joining according to 60: 40 ratio and copy with the hybrid Chinese pennisetum paper pulp of bleaching and needlebush bleached pulp, copy at the Rapid-Kothen of Germany's product and copy the system wood-free paper on the paper device.
Embodiment 5:
Identical with step among the embodiment 1, just step (4) is changed into joining according to 75: 25 ratio with the needlebush bleached pulp and copy with the hybrid Chinese pennisetum paper pulp of bleaching, copy at the Rapid-Kothen of Germany's product and copy glue on the paper device and print papers for books and periodicals.
Embodiment 4 and embodiment 5 joined copy the paper that makes and measure its physical performance index according to national papermaking product standard QB/T1211-1991 condition, measurement result is as shown in table 2 below.
Table 2
| Offset paper | Wood-free paper | |||
| Join and copy measured value | National standard | Join and copy measured value | National standard | |
| Quantitative g/m 2 | 71.7 | 70±3 | 83.7 | 80±3 |
| Tightness g/cm 3 | 0.72 | ≤0.85 | 0.72 | 0.48-1.07 |
| Whiteness % | 88.77 | 70-75 (A etc.) | 94.54 | 〉=87 (A etc.) |
| Opacity % | 89.50 | ≥78 | 90.28 | ≥84 |
| Fracture length km | 5.44 | ≥3.5 | 5.79 | ≥3.5 |
| Tear index mNm 2/g | 5.76 | - | 7.83 | - |
As seen from Table 2, the offset paper of the inventive method preparation and the Main physical performance indications of wood-free paper have all surpassed the national standard requirement, particularly the whiteness of offset paper has been issued to 88.77% in the situation of not adding brightening agent, considerably beyond the peak 75% of national standard requirement.Therefore to adopt the inventive method hybrid Chinese pennisetum be that manufacture paper with pulp offset paper and wood-free paper of raw material has good quality in explanation.
Though above the present invention is described in detail with a general description of the specific embodiments, on basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, not departing from the these modifications or improvements basically of spirit of the present invention, all belong to the scope of protection of present invention.
Claims (10)
1. a pulp and paper making method is characterized in that may further comprise the steps: be feedstock production paper pulp with the hybrid Chinese pennisetum; Association with pulp bleaching; Copy the product that gets made of paper through paper machine.
2. pulp and paper making method according to claim 1 is characterized in that described hybrid Chinese pennisetum is serves as maternal and napier grass N51 is the hybrid of male parent with American pennisetum alopecuroides Tift23A.
3. pulp and paper making method according to claim 1 and 2 is characterized in that described is to adopt the NaOH-AQ method.
4. pulp and paper making method according to claim 3 is characterized in that described preparation paper pulp comprises to get the raw materials ready and boiling.
5. pulp and paper making method according to claim 4, it is characterized in that described getting the raw materials ready is that hybrid Chinese pennisetum is prescinded root and keeps stem bar and part leaf behind head lobe slightly, cut into the long material section of 3-5cm air-dry after, standby behind the equilibrium water conten in the plastic bag of packing into.
6. according to claim 4 or 5 described pulp and paper making methods, it is characterized in that described boiling is to carry out in the multiple tank boiling vessel, dress pot amount is 80-120g over dry raw material/L, NaOH is 16-24% to the consumption of over dry raw material, anthraquinone is 0.02-0.05% to the consumption of over dry raw material, liquor ratio is 1: 6-1: 8, and boiling temperature is 150 ℃-160 ℃, temperature retention time is 1.8h-2.0h.
7. according to the arbitrary described pulp and paper making method of claim 1-6, it is characterized in that described association with pulp bleaching is that the paper pulp after the screening is stored in the plastic bag behind the equilibrium water conten, adds bleaching agent and bleaches after drainage, squeezing, wet pulp are dissociated.
8. pulp and paper making method according to claim 7 is characterized in that described bleaching is a single stage bleaching, and its effective chlorine consumption is 6%-10%/L, and bleaching concentration is 5%-7%, and bleaching temperature is 38 ℃-42 ℃, and bleaching time is 3h-5h.
9. pulp and paper making method according to claim 7 is characterized in that described bleaching is two sections bleachings, and the total consumption of its effective chlorine is 6.0%-10.0%, and bleaching total time is 3h-5h.Two sections effective chlorine amount ratio is 6: 2, and two sections bleaching temperature is 38-42 ℃.
10. pulp and paper making method according to claim 1, it is characterized in that described paper machine copies paper and join through one of hybrid Chinese pennisetum bleached pulp and bleaching needle-point leaf pulp, poplar bleached pulp, Eucalyptus bleached pulp, reed grass bleached pulp and copy manufacture paper with pulp product offset paper or wood-free paper.
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| CNB2005100511690A CN100500993C (en) | 2005-03-02 | 2005-03-02 | Hybrid penisetum NaOH-AQ method for pulp making, bleaching and paper forming |
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| CNB2005100511690A CN100500993C (en) | 2005-03-02 | 2005-03-02 | Hybrid penisetum NaOH-AQ method for pulp making, bleaching and paper forming |
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| CN1827915A true CN1827915A (en) | 2006-09-06 |
| CN100500993C CN100500993C (en) | 2009-06-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108149500A (en) * | 2017-12-14 | 2018-06-12 | 贵州华农集团生态畜牧科技发展有限公司 | The preparation method of true qualities gold and silver grass fiber water suction lining paper |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108149500A (en) * | 2017-12-14 | 2018-06-12 | 贵州华农集团生态畜牧科技发展有限公司 | The preparation method of true qualities gold and silver grass fiber water suction lining paper |
| CN108149500B (en) * | 2017-12-14 | 2019-05-28 | 贵州华农集团生态畜牧科技发展有限公司 | The preparation method of true qualities gold and silver grass fiber water suction lining paper |
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| CN100500993C (en) | 2009-06-17 |
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Granted publication date: 20090617 Termination date: 20130302 |