CN100400743C - Quick cold soaking and mechanical pulping process for grass family - Google Patents
Quick cold soaking and mechanical pulping process for grass family Download PDFInfo
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- CN100400743C CN100400743C CNB2006100420145A CN200610042014A CN100400743C CN 100400743 C CN100400743 C CN 100400743C CN B2006100420145 A CNB2006100420145 A CN B2006100420145A CN 200610042014 A CN200610042014 A CN 200610042014A CN 100400743 C CN100400743 C CN 100400743C
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Abstract
The present invention relates to an APMP papermaking pulping technique, particularly to a fast cold soaking mechanical pulping technique for graminaceous plants. The present invention is characterized in that the present invention comprises the following processing steps: dust removing, medicine adding and cold soaking, washing, medicine adding and jordaning, shoving, medicine adding and pulp mixing, bleaching, washing, and medicine adding and whitening. The present invention has the advantages: (1) cold soaking time is greatly shortened, and cold soaking needs only four hours around; (2) the washing is executed in advance of jordaning so that washing equipment is greatly reduced, energy consumption is reduced, and water is saved so as to reduce the cost of pulping greatly; (3) the jordaning and the bleaching are synchronously carried out; (4) the medicine adding and whitening increases the whiteness of fiber of graminaceous plants, which achieves a new breakthrough; (5) the equipment of the technique has little investment so that a great amount of energy is saved, and thus, the present invention is suitable for large-scale industrial production.
Description
One, technical field:
The present invention relates to a kind of paper-making pulping process, particularly a kind of quick cold soaking and mechanical pulping process for grass family of medicine cold soaking.
Two, background technology:
For a long time, the paper industry of China is always based on non-wood-fiber slurrying, and the problem of its existence is not only seriously polluted, and the disadvantage of its existence is that slurry yield is low, and equipment is complicated and investment is big, and is also very big to the consumption of the energy and water resource, is unfavorable for clean type production.In addition, this technology has been declared Chinese invention patent, and the patent No. is: 2003101055357 " no boiling drug immersion ryegrass pulping technology ", and the problem of its existence is: (1) cold soaking time is longer; (2) also come with some shortcomings in the technological process.
Three, summary of the invention:
Purpose of the present invention is exactly the above-mentioned defective that exists at prior art, and a kind of new technology is provided, and minimizing equipment input and cutting down the consumption of energy improves slurry yield, shortens soak time, has guaranteed the quick cold soaking and mechanical pulping process for grass family of soft slurry quality.
Its technical scheme is: comprise following processing step:
(1), dedusting: dust and impurity are removed;
(2), cold soaking: normal temperature or subzero add chemicals and soak more than 2 hours, wherein, the grass class when cold soaking and the percentage by weight between the chemicals be: grass raw material: NaOH: sodium sulfite: water=100: (5-15): (1-5): (300-500);
(3), washing: with the raw material behind the middle section water washing cold soaking after handling;
(4), defibrination: will wash good raw material in two steps and send into defibrination in the fiberizer; The first step is sent the raw material that washing is good to high-density paste mill, and heating 60-100 degree during defibrination at this moment in the charging aperture dosing of high-density paste mill, carries out the bleaching first time in defibrination; In second step, enter middle-density refiner behind the high consistency refining;
(5), shove: shove is exactly that the water of screened stock material is extruded, and water is discharged to the middle section water treatment process;
(6), mix slurry: mix the water that adds of slurry from the middle section water of handling, the slurry of high concentration add water, dosing mixes slurry, sends into bleaching process;
(7), bleaching: in the container of bleaching, carry out bleaching temperature 95-100 degree;
(8), carry white: improve whiteness with the slurry of oxalic acid after bleaching.
Preferred scheme is: washing (3) step comprises following two parts;
The first, circulation flushing mainly reclaims residual alkali, and its black liquor is as the cycling use of water that soaks;
The second, with whole float back water or handle after middle section water fully wash raw material behind the cold soaking, the water after the washing is discharged in the middle section water treatment process.
Further preferred scheme is: the preferable percentage by weight of grass class when cold soaking and between the chemicals is: grass raw material: NaOH: sodium sulfite: cold soaking auxiliary agent: water=100: (5-15): (1-5): (0.1-1.5): (300-500).
The percentage by weight of grass raw material and hydrogen peroxide is (an over dry material) during the defibrination dosing: the cold soaking raw material: hydrogen peroxide is 100: (1-3).
When mixing slurry (oven dry stock) dosing and the percentage by weight of hydrogen peroxide, NaOH be: the slurry behind the shove: hydrogen peroxide: NaOH=100: (3-6): (1-1.5).
Carry the percentage by weight of white time slurry (over dry material) and oxalic acid: the slurry after the bleaching: oxalic acid=100: (0.1-1).
Described cold soaking auxiliary agent is made up of the following weight proportion raw material: magnesium carbonate 10-30 part, magnesia 30-60 part, Cosan 10-30 part.
Described cold soaking auxiliary agent is made up of the following weight proportion raw material: magnesium carbonate 10-30 part, magnesia 30-60 part, bentonite 10-30 part, Cosan 10-30 part.
The invention has the beneficial effects as follows: the advantage of the method for adopting new technology is as follows:
(1) the cold soaking time shortens greatly, only needs about 4 hours;
(2) technology of washing is carried out before advanceing to defibrination, thereby significantly reduced washing facility, cut down the consumption of energy and saved the water source, the cost of slurrying is reduced greatly;
(3) refining process and bleaching process carry out synchronously;
(4) put forward white technology the whiteness of the fiber of grass class is improved, realized new breakthrough;
(5) this technological equipment investment is less, has saved a large amount of energy, large-scale industrial production preferably.
Four, the specific embodiment:
Embodiment 1: adopt the cotton stalk in the grass class to further specify manufacture craft:
1, dedusting: the cotton stalk dedusting mainly is that dust and leaf are removed, and with disintegrating machine cotton stalk is broken into 0.5-1cm, the shape that 2-3mm is thick;
2, cold soaking: during immersion normal temperature or subzero all can, soak time is 4 hours;
Immersion process: in the inside, pond or buttress formula, the immersion medication by the oven dry weight percentage of cotton stalk is: cotton stalk: NaOH: sodium sulfite: cold soaking auxiliary agent: water=100: 12: 3: 0.5: 350.
3, washing: the middle section water after washing is used and floated after water or the processing;
The first, add 3 tons in water by over dry material per ton, circulation flushing in the pond mainly reclaims residual alkali, and as the cycling use of water that soaks;
The second, with whole float back water or handle after middle section water abundant washing material in the pond, raw material at this moment is not a fiber, relatively good washing.Water after the washing is discharged to the water treatment operation and carries out the middle section water processing;
4, defibrination: defibrination is defibrination in two steps:
The first, the raw material that washing is good is sent to high-density paste mill, heating 60-100 degree during defibrination, at this moment in the dosing of high consistency refining charging aperture, the percentage by weight that the raw material over dry is pressed in dosing adds raw material: hydrogen peroxide=100: 2; Carry out the bleaching first time to cotton stalk pulp;
The second, high consistency refining enters middle-density refiner.
5, shove: shove is exactly that the water of screened stock material is extruded.At this moment it is higher that the water of extruding contains lignin, and water is discharged to the middle section water treatment process, and shove concentration is 30-40%;
6, mix slurry: mix the water that adds of slurry from the middle section water of handling (for clear water), the slurry of high concentration is added water, dosing, and to mix slurry concentration be the percentage by weight of 10-12% dosing by oven dry stock: slurry: hydrogen peroxide: NaOH=100: 6: 1.5;
7, bleaching: bleaching is carried out in the container of bleaching, bleaching humidity 95-100 degree, 15-20 minute heat time heating time, temperature retention time 30 minutes;
8, washing: washing mainly is that the residual alkali cleaning of bleaching in the slurry gone out, the water yield that washes out seldom, washings at this moment all are used on the washing material;
9, carry white: carrying white is exactly to improve whiteness with the slurry of oxalic acid after bleaching, adds oxalic acid by the percentage by weight of over dry slurry to be: slurry: oxalic acid=100: 0.7, at this moment Jiang pH value be 6, whiteness 85%, screened yield more than 65%, slurry brightness reversion not;
10, correct grinding: finish milling slurry is exactly that the slurry of carrying after white is finish-ground to the used fiber of papermaking.
Embodiment 2: adopt the wheat straw in the grass class to further specify manufacture craft:
1, chaffcutter dedusting: be exactly the blade that wheat straw is cut into the 2-3 centimetre, dedusting mainly is that dust, wheat bran, Mai Ye are removed.
2, cold soaking: when wheat straw is soaked in the pond or the buttress formula soak all and go, soak time 3 hours is not limited by temperature.The immersion medication by the oven dry weight percentage of wheat straw is: wheat straw: NaOH: sodium sulfite: auxiliary agent: water=100: 10: 2.5: 0.5: 400.
3, washing, defibrination, shove, mix slurry, wash, carry technology such as white, correct grinding be on the cotton haulm raw material with.
Wheat straw screened yield 65%, whiteness 80%, slurry be brightness reversion not.
More than two kinds of manufacture crafts can effectively economize on coal 100%, float before washing economize on electricity 90%, float back washing economize on electricity 80%, water saving 80%, and save float before whole complex device of washing.
In addition, the prescription of the cold soaking auxiliary agent mentioned of above-mentioned two embodiment is as follows:
Form by the following weight proportion raw material: magnesium carbonate 10-30 part, magnesia 30-60 part, bentonite 10-30 part, Cosan 10-30 part.
Preferable materials of weight proportions is formed: magnesium carbonate 10-20 part, magnesia 20-40 part, bentonite 20-30 part, Cosan 20-30 part.
The theoretical foundation with the black liquor circulation of slurrying is as follows in this technology:
Cold soaking slurrying is a kind of new pulping process that carries out under normal temperature or low temperature, be the chemistry with machinery and deposit, make
A kind of pulping process that slurry is synchronous with bleaching.
Plant is all by cellularity, all strings are produced by cell, in the used plant material of paper-making pulping, though cell is die, it has stayed materials such as fixing fiber, hemicellulose, lignin, also stayed more capillary, and fiber many cavitations have been produced.The cold soaking soup will immerse fibrous inside along with capillary when paper-making pulping, primary wall and secondary wall are being destroyed, soup is spreading in the inside of grass, swollen in the gap substance of cell membrane, make the connector of materials such as lignin between the fibrefill, hemicellulose obtain destruction, grass as raw material swollen, blade and fiber deliquescing more more, though fiber does not at this moment have cracking and separates, but reached the requirement of paper-making pulping, by mechanical mechanism, just can produce not only soft but also good paper pulp.
The advantage of cold soaking slurrying maximum is exactly that the material of raw material inside does not have sex change, lignin, hemicellulose, colloid, shallow lake Powder, silicon, the ash material that grades does not have dissolved and modification, has become sediment in the water through acting on of auxiliary agent; And it is cold Replace with clear water during the black liquor water of infuse slurry circulation, water is black and not dense, so black liquor can recycle for a long time.
Claims (9)
1. quick cold soaking and mechanical pulping process for grass family is characterized in that comprising following processing step:
(1), dedusting: dust and impurity are removed;
(2), cold soaking: normal temperature or subzero add chemicals and soak more than 2 hours, wherein, the grass class when cold soaking and the percentage by weight between the chemicals be: grass raw material: NaOH: sodium sulfite: water=100: (5-15): (1-5): (300-500);
(3), washing: with the raw material behind the middle section water washing cold soaking after handling;
(4), defibrination: will wash good raw material in two steps and send into defibrination in the fiberizer; The first step is sent the raw material that washing is good to high-density paste mill, and heating 60-100 degree during defibrination at this moment in the charging aperture dosing of high-density paste mill, carries out the bleaching first time in defibrination; In second step, enter middle-density refiner behind the high consistency refining;
(5), shove: shove is exactly that the water of screened stock material is extruded, and water is discharged to the middle section water treatment process;
(6), mix slurry: mix the water that adds of slurry from the middle section water of handling, the slurry of high concentration add water, dosing mixes slurry, sends into bleaching process;
(7), bleaching: in the container of bleaching, carry out bleaching temperature 95-100 degree;
(8), carry white: improve whiteness with the slurry of oxalic acid after bleaching.
2. quick cold soaking and mechanical pulping process for grass family according to claim 1 is characterized in that: after (7) bleaching in the described processing step, can also increase following steps:
(9), the washing: the washing mainly be the bleaching after residual alkali cleaning go out, the water yield that washes out seldom, washings at this moment all are used for washing material.
3. quick cold soaking and mechanical pulping process for grass family according to claim 1 is characterized in that: described washing (3) step comprises following two parts;
The first, circulation flushing mainly reclaims residual alkali, and its black liquor is as the cycling use of water that soaks;
The second, with whole float back water or handle after middle section water fully wash raw material behind the cold soaking, the water after the washing is discharged in the middle section water treatment process.
4. quick cold soaking and mechanical pulping process for grass family according to claim 1 is characterized in that: the preferable percentage by weight of grass class when cold soaking and between the chemicals is: grass raw material: NaOH: sodium sulfite: cold soaking auxiliary agent: water=100: (5-15): (1-5): (0.1-1.5): (300-500).
5. quick cold soaking and mechanical pulping process for grass family according to claim 1 is characterized in that: the percentage by weight of grass raw material and hydrogen peroxide is during the defibrination dosing: over dry material cold soaking raw material: hydrogen peroxide is 100: (1-3).
6. quick cold soaking and mechanical pulping process for grass family according to claim 1 is characterized in that: mix slurry during dosing and the percentage by weight of hydrogen peroxide, NaOH be: the oven dry stock behind the shove: hydrogen peroxide: NaOH=100: (3-6): (1-1.5).
7. quick cold soaking and mechanical pulping process for grass family according to claim 1 is characterized in that: the percentage by weight of carrying oven dry stock and oxalic acid when white: the slurry after the bleaching: oxalic acid=100: (0.1-1).
8. quick cold soaking and mechanical pulping process for grass family according to claim 4 is characterized in that: described cold soaking auxiliary agent is made up of the following weight proportion raw material: magnesium carbonate 10-30 part, magnesia 30-60 part, Cosan 10-30 part.
9. quick cold soaking and mechanical pulping process for grass family according to claim 8 is characterized in that: described cold soaking auxiliary agent is made up of the following weight proportion raw material: magnesium carbonate 10-30 part, magnesia 30-60 part, bentonite 10-30 part, Cosan 10-30 part.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100420145A CN100400743C (en) | 2006-01-13 | 2006-01-13 | Quick cold soaking and mechanical pulping process for grass family |
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| CNB2006100420145A CN100400743C (en) | 2006-01-13 | 2006-01-13 | Quick cold soaking and mechanical pulping process for grass family |
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| CN100400743C true CN100400743C (en) | 2008-07-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101200862B (en) * | 2007-05-30 | 2011-09-21 | 山东华林环保科技有限公司 | Clean pulping process |
| CN101255664B (en) * | 2008-02-02 | 2010-10-20 | 山东太阳纸业股份有限公司 | Method for pulping of non-lumber fibre |
| CN101831819A (en) * | 2009-03-09 | 2010-09-15 | 陈根长 | New aggregative-state modified pulp and paper making process |
| CN101982607B (en) * | 2010-10-14 | 2013-01-23 | 湖南美莱精化有限公司 | Cooking agent for papermaking and pulping and preparation method thereof |
| CN103174047A (en) * | 2013-04-16 | 2013-06-26 | 枣庄鸿润纸业有限公司 | Process for refining wheat-straw pulp by hydrogen peroxide enzyme method |
| CN105625074A (en) * | 2016-02-24 | 2016-06-01 | 张民贵 | Process for preparing pulp from hemp stems |
| CN109422566A (en) * | 2017-08-30 | 2019-03-05 | 黑龙江如柏科技有限公司 | A kind of foliar fertilizer and preparation method thereof that the black liquid generated using soda pulping process technique is prepared |
| CN110396843A (en) * | 2019-07-15 | 2019-11-01 | 苏州绿驰机械设备有限公司 | A kind of separating plant non-fibrous material and fibrous matter technique |
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| CN1070972A (en) * | 1992-09-22 | 1993-04-14 | 辽宁省造纸研究所 | Mulberry shoot, cigarette stalk cold soda pulping paper technology |
| CA2230315A1 (en) * | 1998-02-17 | 1999-08-17 | Celine Leduc | Process for increasing mechanical wood pulp brightness in a refiner |
| DE10114341A1 (en) * | 2001-03-23 | 2002-10-10 | Rettenmaier & Soehne Gmbh & Co | Milling and bleaching natural cellulosic material, giving products used for paper or cardboard manufacture or as a dietary fiber, comprises hydrogen peroxide treatment at high solids level in a hammer or centrifugal mill |
| CN1533459A (en) * | 2001-07-19 | 2004-09-29 | Four stage alkaline peroxide mechanical pulping | |
| CN1621610A (en) * | 2003-11-24 | 2005-06-01 | 刘长如 | Technology for preparing ryegrass slurry by pharmaceutical soak without boiling |
| CN1707019A (en) * | 2005-05-30 | 2005-12-14 | 刘长如 | Fast enviornment protection cold soaking pulping process with broad-leaved wood material |
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2006
- 2006-01-13 CN CNB2006100420145A patent/CN100400743C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1070972A (en) * | 1992-09-22 | 1993-04-14 | 辽宁省造纸研究所 | Mulberry shoot, cigarette stalk cold soda pulping paper technology |
| CA2230315A1 (en) * | 1998-02-17 | 1999-08-17 | Celine Leduc | Process for increasing mechanical wood pulp brightness in a refiner |
| DE10114341A1 (en) * | 2001-03-23 | 2002-10-10 | Rettenmaier & Soehne Gmbh & Co | Milling and bleaching natural cellulosic material, giving products used for paper or cardboard manufacture or as a dietary fiber, comprises hydrogen peroxide treatment at high solids level in a hammer or centrifugal mill |
| CN1533459A (en) * | 2001-07-19 | 2004-09-29 | Four stage alkaline peroxide mechanical pulping | |
| CN1621610A (en) * | 2003-11-24 | 2005-06-01 | 刘长如 | Technology for preparing ryegrass slurry by pharmaceutical soak without boiling |
| CN1707019A (en) * | 2005-05-30 | 2005-12-14 | 刘长如 | Fast enviornment protection cold soaking pulping process with broad-leaved wood material |
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