CN101177921A - Continuous pulping method for cotton stalk natural color chemomechanical pulp - Google Patents
Continuous pulping method for cotton stalk natural color chemomechanical pulp Download PDFInfo
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- CN101177921A CN101177921A CNA2007101152463A CN200710115246A CN101177921A CN 101177921 A CN101177921 A CN 101177921A CN A2007101152463 A CNA2007101152463 A CN A2007101152463A CN 200710115246 A CN200710115246 A CN 200710115246A CN 101177921 A CN101177921 A CN 101177921A
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Abstract
The invention relates to a cotton-stalk true-color chemo-mechanical continuous pulping method. The invention comprises the steps that: (1) the materials are cut into material sheets equal to or smaller than 40mm by machines; (2) the qualified materials are dedusted by a cleaner, sent into a material warehouse to be stored, sent to a washer to be washed, heavy impurities are separated by the function of washing water, and then the materials enter into a dewaterer to be dewatered, to eliminate the sand and dust in the materials; (4) the dewatered materials are sent to a quantifier to be quantified, and the quantified materials are squeezed and dewatered by a helical feeder and form a compact material plunger, which is sent into a digester; (4) digestion liquor is added into the digester to fully soak the material plunger, and steam is introduced for the digestion; (5) after the digestion, the materials drop to a high concentration thermofiner to be defibrinated; (6) the defibrinated pulp is injected to a blow tank to be latented; (7) the latented pulp is washed, sifted, and finally can be sent to a paper machine for papermaking. The invention has the advantages of simple technique process, continuous digestion and defibrination, good pulp quality, and high yielding.
Description
Technical field:
The present invention relates to the pulping process in a kind of pulping and paper-making field, especially a kind of continuous pulping method for cotton stalk natural color chemomechanical pulp.
Background technology:
At present, produce the chemi-mechanical pulp technology with cotton stalk as raw material and can be divided into cotton stalk bleached chemi-mechanical pulp and cotton stalk natural color chemomechanical pulp.Traditional cotton stalk natural color chemomechanical pulp pulping process pulping yield is low, and refining concentration is low, and refining effect is poor, and power consumption is big.Mentioned the pulping process of a kind of cotton stalk or shrub or brush wood in the patent No. is 200510051367.7 patent, mainly there is following shortcoming in it: 1. batch (-type) slurrying, and production capacity is little; 2. raw material does not carry out dedusting, removal of impurities, the impurity content height; 3. the slurry after boiling must could pulping through twice defibrination operation, and technological process is complicated numerous tired; 4. the slurry after boiling can not directly enter fiberizer, and slurry temperature is low before the mill, and refining effect is poor.
Summary of the invention:
The invention provides a kind of continuous pulping method for cotton stalk natural color chemomechanical pulp, it can continuously cooking, the high pressure defibrination, and refining effect is good, the production capacity height, and the pulp strength height of acquisition has solved problems of the prior art.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be: a kind of continuous pulping method for cotton stalk natural color chemomechanical pulp may further comprise the steps:
(1), cotton haulm raw material is through the tablet of mechanical cutting one-tenth≤40mm;
(2), qualified raw material sends into feed bin after the deduster dedusting, after feed bin stores, deliver to the washer washing, after isolating heavy seeds under the effect of washings, enter Water Extraction Machinery and remove washings;
(3), the clean raw material in dehydration back is sent to meter, raw material forms closely through the scroll feeder extrusion dehydration and to send into boiling vessel behind the material plug after the meter metering;
(4), in boiling vessel, add cooking liquor and soak into, and feed steam and carry out boiling;
(5), after boiling finishes, raw material falls under gravity into high dense defibrator and carries out defibrination;
(6), the slurry behind the dense defibrator of height mill spurt disappear to the spraying pot latent;
(7), the slurry that disappears after diving by spraying pot sends into washing apparatus arranged the washing, the slurry after the washing is sent into screening installation and is screened, the slurry after the screening can be delivered to the paper machine and copy paper.Washing apparatus arranged is wash engine, and screening installation is slotted screen or hole sizer.
Washer is the twin drum washer described in the step (2); Water Extraction Machinery is the inclined screw Water Extraction Machinery.
Meter described in the step (3) is a pin drum meter; Boiling vessel is that transverse tube connects steaming device.
Cooking liquor is a NaOH solution in the described conditions of cooking of step (4), concentration 50～80 grams per liters, and consumption is 6～12% by 100%NaOH to the over dry raw material; Liquor ratio 1: 2.0～3.5; The high-temperature steam that feeds makes boiling temperature remain on 120～180 ℃, and digestion time is 15～40 minutes.
The beating degree of defibrination disposed slurry described in the step (5) is 20～35 ° of SR.
Disappear the dive time of slurry described in the step (6) in spraying pot is 0.5～8 hour.
The present invention adopts the said method advantage to be:
1. technological process is simple, but adopts transverse tube to connect the feeding limit boiling of steaming device limit, realizes the continuously cooking defibrination, the production capacity height;
2. carry out defibrination because the raw material after the boiling directly enters fiberizer under high temperature, high pressure, refining effect is good, and energy resource consumption is few;
3. adopt dry and wet stock preparation dedusting, washing, dehydration equipment, reduced impurities in raw materials content, helped improving the utilization rate and the stock quality of NaOH solution;
4. become the pulp yield height, improve about 15% than traditional pulping process.
Description of drawings:
Fig. 1 is a process chart of the present invention.
The specific embodiment:
For clearly demonstrating the technical characterstic of this programme, below by the specific embodiment, the present invention will be described in detail.
A kind of continuous pulping method for cotton stalk natural color chemomechanical pulp may further comprise the steps: cotton haulm raw material cuts into≤tablet of 40mm through cotton stalk pulverizer; Qualified raw material is sent into feed bin after the deduster dedusting, after feed bin stores, deliver to the washing of twin drum washer, after isolating heavy seeds under the effect of washings, enters the inclined screw Water Extraction Machinery and removes washings; The raw material of cleaning is sent to pin drum meter after the dehydration, after the metering of raw material distribution drum meter, sends into transverse tube and connect steaming device after the formation of scroll feeder extrusion dehydration is expected plug closely; In transverse tube connects steaming device, add the NaOH cooking liquor raw material is soaked into, the compound concentration of NaOH solution is 65 grams per liters, is 8% by 100%NaOH solution to over dry raw material consumption, liquor ratio 1: 2.7 was carried out thermophilic digestion 20 minutes under 150 ℃ ± 5 ℃ high-temperature steam effect; After boiling finished, raw material fell under gravity into high dense defibrator and carries out defibrination, and the beating degree of gained slurry is 30 ° of SR; Slurry behind the dense defibrator of height mill spurts and disappears to the spraying pot latently, and the time is 4 hours; Send into wash engine and wash by disappear slurry after diving of spraying pot, the slurry after the washing is sent into screening installation and is screened, and the slurry after the screening can be delivered to the paper machine and copy paper.Utilize above-mentioned pulping process to become pulp yield 81.2%.With this slurry 119g/m that manufactures paper with pulp
2High-strength corrugated base paper, ring crush index 9.8N.m/g, fracture length 4.6Km, tightness 0.55g/cm
3, all indexs all surpass the requirement of national A level high-strength corrugated base paper.
Utilize above-mentioned continuous pulping method, can realize continuously cooking slurrying, energy resource consumption is few, has reduced production cost, becomes the pulp yield height, and stock quality is good, and all indexs all surpass the requirement of national A level high-strength corrugated base paper, improves about 15% than traditional pulping process.
Claims (6)
1. continuous pulping method for cotton stalk natural color chemomechanical pulp is characterized in that: may further comprise the steps:
(1), cotton haulm raw material is through the tablet of mechanical cutting one-tenth≤40mm;
(2), qualified raw material sends into feed bin after the deduster dedusting, after feed bin stores, deliver to the washer washing, after isolating heavy seeds under the effect of washings, enter Water Extraction Machinery and remove washings;
(3), the clean raw material in dehydration back is sent to meter, raw material forms closely through the scroll feeder extrusion dehydration and to send into boiling vessel behind the material plug after the meter metering;
(4), in boiling vessel, add cooking liquor and soak into, and feed steam and carry out boiling;
(5), after boiling finishes, raw material falls under gravity into high dense defibrator and carries out defibrination;
(6), the slurry behind the dense defibrator of height mill spurt disappear to the spraying pot latent;
(7), the slurry that disappears after diving by spraying pot sends into washing apparatus arranged the washing, the slurry after the washing is sent into screening installation and is screened, the slurry after the screening can be delivered to the paper machine and copy paper.
2. a kind of continuous pulping method for cotton stalk natural color chemomechanical pulp according to claim 1 is characterized in that: washer is the twin drum washer described in the step (2); Water Extraction Machinery is the inclined screw Water Extraction Machinery.
3. a kind of continuous pulping method for cotton stalk natural color chemomechanical pulp according to claim 1 is characterized in that: meter described in the step (3) is a pin drum meter; Boiling vessel is that transverse tube connects steaming device.
4. according to claim 1,2 or 3 described a kind of continuous pulping method for cotton stalk natural color chemomechanical pulp, it is characterized in that: cooking liquor is a NaOH solution in the described conditions of cooking of step (4), concentration 50～80 grams per liters, consumption is 6～12% by 100%NaOH to the over dry raw material; Liquor ratio 1: 2.0～3.5; The high-temperature steam that feeds makes boiling temperature remain on 120～180 ℃, and digestion time is 15～40 minutes.
5. a kind of continuous pulping method for cotton stalk natural color chemomechanical pulp according to claim 4 is characterized in that: the beating degree of defibrination disposed slurry described in the step (5) is 20～35 ° of SR.
6. a kind of continuous pulping method for cotton stalk natural color chemomechanical pulp according to claim 5 is characterized in that: disappear the dive time of slurry described in the step (6) in spraying pot is 0.5～8 hour.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007101152463A CN101177921A (en) | 2007-12-12 | 2007-12-12 | Continuous pulping method for cotton stalk natural color chemomechanical pulp |
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| CNA2007101152463A CN101177921A (en) | 2007-12-12 | 2007-12-12 | Continuous pulping method for cotton stalk natural color chemomechanical pulp |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337700A (en) * | 2011-10-20 | 2012-02-01 | 山东泉林纸业有限责任公司 | Pulping method of boiling grass fiber materials and sodium carbonate |
| CN103276617A (en) * | 2013-06-03 | 2013-09-04 | 佳木斯龙江福浆纸有限公司 | Oxygen alkaline pulping cooking device |
| CN104674584A (en) * | 2015-02-06 | 2015-06-03 | 新疆国力源环保科技有限公司 | Cotton stalk natural colour semichemical mechanical pulp process |
| CN104746372A (en) * | 2015-03-05 | 2015-07-01 | 新疆国力源环保科技有限公司 | Preparation process of flax natural-color semi-chemimechanical pulp |
| CN105155318A (en) * | 2015-02-12 | 2015-12-16 | 新疆国力源环保科技有限公司 | Cotton stalk bleached chemi-mechanical pulp process |
| CN110080027A (en) * | 2018-11-26 | 2019-08-02 | 中国制浆造纸研究院有限公司 | A kind of full stalk technique for chemomechanical pulp-making of corn stover |
| CN111549552A (en) * | 2020-05-25 | 2020-08-18 | 广西大学 | High-yield chemi-mechanical pulp making method for recycling alkali in waste water |
| CN114438807A (en) * | 2021-12-09 | 2022-05-06 | 潍坊德瑞生物科技有限公司 | Production method of chemi-mechanical pulp |
| CN115305738A (en) * | 2022-08-22 | 2022-11-08 | 华南理工大学 | LCP cleaning pulping method |
-
2007
- 2007-12-12 CN CNA2007101152463A patent/CN101177921A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337700A (en) * | 2011-10-20 | 2012-02-01 | 山东泉林纸业有限责任公司 | Pulping method of boiling grass fiber materials and sodium carbonate |
| CN102337700B (en) * | 2011-10-20 | 2014-04-09 | 山东泉林纸业有限责任公司 | Pulping method of boiling grass fiber materials and sodium carbonate |
| CN103276617A (en) * | 2013-06-03 | 2013-09-04 | 佳木斯龙江福浆纸有限公司 | Oxygen alkaline pulping cooking device |
| CN103276617B (en) * | 2013-06-03 | 2015-07-29 | 佳木斯龙江福浆纸有限公司 | A kind of oxygen alkali pulping digesting apparatus |
| CN104674584A (en) * | 2015-02-06 | 2015-06-03 | 新疆国力源环保科技有限公司 | Cotton stalk natural colour semichemical mechanical pulp process |
| CN105155318A (en) * | 2015-02-12 | 2015-12-16 | 新疆国力源环保科技有限公司 | Cotton stalk bleached chemi-mechanical pulp process |
| CN104746372A (en) * | 2015-03-05 | 2015-07-01 | 新疆国力源环保科技有限公司 | Preparation process of flax natural-color semi-chemimechanical pulp |
| CN110080027A (en) * | 2018-11-26 | 2019-08-02 | 中国制浆造纸研究院有限公司 | A kind of full stalk technique for chemomechanical pulp-making of corn stover |
| CN110080027B (en) * | 2018-11-26 | 2021-02-09 | 中国制浆造纸研究院有限公司 | Corn straw whole-stalk chemico-mechanical pulping process |
| CN111549552A (en) * | 2020-05-25 | 2020-08-18 | 广西大学 | High-yield chemi-mechanical pulp making method for recycling alkali in waste water |
| CN114438807A (en) * | 2021-12-09 | 2022-05-06 | 潍坊德瑞生物科技有限公司 | Production method of chemi-mechanical pulp |
| CN115305738A (en) * | 2022-08-22 | 2022-11-08 | 华南理工大学 | LCP cleaning pulping method |
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