CN100497810C - Pulp and paper making method by continuously boiling hollow palm fruit string fiber - Google Patents
Pulp and paper making method by continuously boiling hollow palm fruit string fiber Download PDFInfo
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- CN100497810C CN100497810C CNB2005100607369A CN200510060736A CN100497810C CN 100497810 C CN100497810 C CN 100497810C CN B2005100607369 A CNB2005100607369 A CN B2005100607369A CN 200510060736 A CN200510060736 A CN 200510060736A CN 100497810 C CN100497810 C CN 100497810C
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Abstract
This invention relates to a slurrying paper making method, which comprises the following steps: a) continuous boiling the palm fruit null string fiber to prepare chemical pulp or semi-chemical pulp; b) slurry scouring and extracting black liquor using countercurrent washing method; c) screening slurry with pressure riddle; d) cleaning slurry with desilter; e) couching, shaping the dressing system, pressing and drying.
Description
Technical field
The invention belongs to the pulp and paper technology field, relate in particular to a kind of continuously boiling hollow palm fruit string fiber pulp and paper making method.
Technical background
Palm mainly is distributed in south east asia in the world, as Malaysia, and Indonesia etc.The hollow palm fruit string fiber of palm fruit after oil expression is a kind of raw material of papermaking fiber of high-quality, and only the annual hollow palm fruit string that produces of Malaysia is about 4,000,000 tons.But up to now, in the method document of disclosed employing hollow palm fruit string fiber pulping and paper-making, have only batch cooking pulp and paper making method (as the ZL01126541.8 patent of invention), still do not have the relevant report that adopts the continuously boiling hollow palm fruit string fiber pulp and paper making method.The batch cooking pulp and paper making method has many shortcomings, and discontinuous as production process, automaticity is low, and steam and power consumption are unbalanced, and pulping uniformity and quality stability are poor.
Summary of the invention
In order to overcome the above-mentioned shortcoming of prior art, the present invention proposes the papermaking process that a kind of continuously cooking pulping technique is handled hollow palm fruit string fiber.The paper pulp that makes to be used to manufacture paper with pulp multiple class pulpboard, paper and board product.
The present invention solves the scheme that its technical problem takes:
Raw materials used is hollow palm fruit string fiber after treatment, and the experimental data of its characteristic is as follows:
Table 1, the hollow palm fruit string fiber form
Table 2, the main chemical composition of hollow palm fruit string fiber
By table 1, table 2 as seen, hollow palm fruit string fiber belongs to the moderate-length fiber, and the big wall of lumen is thin, and heteroproteose cell content is higher.Chemical constituent is compared with the broadleaf poplar, and extract content is high slightly, and content of cellulose is low slightly, and content of ashes is bigger.Content of lignin is approaching.But hemicellulose level is lower, very helps obtaining in the pulping process higher yield.
Production process of the present invention is as follows:
1, boiling
Qualified tablet is through warm water's flush away impurity, dehydration is after the meter metering, enter transverse tube equably and connect the steaming system, earlier be preheated to 80 ℃ at this tablet at the decatize pipe, enter then scroll feeder be squeezed to mass dryness fraction be 40%, form material and enter T type pipe, mix with cooking liquor and fall into boiling pipe, cold the spurting of thick slurry of boiling to spraying pot at this.
The boiling chemical pulp adopts following process conditions:
Active alkali consumption % (Na
2O meter): 15～20, AQ consumption %:0.03～0.06, liquor ratio: 1:3～4 are steamed the time (130-1400C) min:20～45 in advance, digestion time min:45～75, boiling maximum temperature ℃: 160～180.
The boiling semi-chemical pulp adopts following process conditions:
Active alkali consumption % (Na
2O meter): 5～8, AQ consumption %:0.02～0.05, liquor ratio: 1:3～4 are steamed the time (130-1400C) min:20～45 in advance, digestion time min:20～40, boiling maximum temperature ℃: 160～170.
In the above-mentioned steps, be the different of boiling vessel and cooking schedule with a significant difference of batch cooking.
Utilize above-mentioned production procedure,, can produce the semi-chemical pulp of be fit to manufacture paper with pulp kraft paperboard and high-strength corrugated base paper as long as cooking schedule is done suitably to adjust.
2, washing and black liquid extraction
Slurry through step 1 is come out must further wash and extract black liquor.Slurry washing and black liquid extraction are taked counter flow washing, and according to the water filtering performance of this raw material, the equipment of employing can wash also available many Double screw pulp extruder counter flow washings with many vacuum pulp washing machine series connection.For guaranteeing the wash degree of slurry, should make more than the extraction rate reached to 90% of black liquor.According to pulping process and production-scale difference, the concentrated black liquid that slurrying produces can adopt black-liquor combustion method technology, both can eliminate the pollution of black liquor of pulp making, carries out the recovery of chemicals and the reuse of heat energy simultaneously.Also can utilize black liquor to produce byproducts such as sodium lignosulfonate.
3, screening, purification
Clean disposed slurry must screen, purified treatment, to remove the weight impurity in the slurry.This method screening installation adopts pressurized screen, and cleaning equipment adopts low dense desander.
4, bleaching
If produce cultural paper, must further bleach processing to the slurry after screening, the purification.The present invention proposes the method for bleaching and the process conditions that are fit to the hollow palm fruit string fiber characteristics.
Method for bleaching adopts CEH tri-stage bleaching flow process, and its each section dosage and treatment conditions are as follows:
5, making beating
The purpose of making beating is to improve interfibrous bond strength.According to the difference of producing the paper kind, the beating degree of being controlled is also different.The Production and Packaging cardboard, as kraft paperboard and high-strength corrugated base paper, its beating degree is 35～45oSR, produces cultural paper, its beating degree is 40～80oSR.
6, copy paper
The process of copying paper comprises that moulding, squeezing, drying and the press polish of constant part, page batch etc.
The present invention is characterized in the different of boiling mode and cooking schedule, the equipment of use all adopts conventional pulping and papermaking equipments.
This method is compared with batch cooking, has system's production serialization, Automation of Manufacturing Process, steam and power consumption equilibrium, and no peak load, pulping is even, advantages such as steady quality.
Instantiation:
1, boiling
Qualified tablet process warm water flush away impurity from preparation room, dehydration is after the meter metering, enter transverse tube equably and connect the steaming system, earlier be preheated to 80 ℃ at this tablet at the decatize pipe, enter then scroll feeder be squeezed to mass dryness fraction be 40%, form material and enter T type pipe, mix with cooking liquor and fall into boiling pipe, cold the spurting of thick slurry of boiling to spraying pot at this.
In the above-mentioned steps, be the different of boiling vessel and cooking schedule with a significant difference of batch cooking.
In the production method of the present invention, its key equipment is the transverse tube continuous steamer, and it is made up of scroll feeder, T shape pipe, boiling pipe and vertical discharger etc.Tablet at first enters scroll feeder, and tablet is filled in the solid material plug of interruption-forming by the spiral that compression ratio is arranged at material, and this material plug is sealed the high steam in the boiling pipe.Material plug mass dryness fraction is greatly about 40-45%, and its density is approximately 550 kilograms per cubic meter, and its mass dryness fraction and density often are subjected to the influence of the abrasion condition of scroll feeder spiral itself.For preventing owing to situations such as situations such as spiral wear, supplied materials interruption cause that the tight steam that takes place of material plug is regurgitated, scroll feeder and the supporting use of T type pipe of being with the counnter attack spray apparatus.
The material plug enters T shape pipe after leaving feeding plug tube, expands with soup and high steam contact back at once, begins to absorb cooking liquor and high steam, has from then on begun digestion process.
Tablet behind the absorption soup enters the boiling pipe that has been heated by high steam, is warming up to boiling temperature rapidly, and soup and lignin continue reaction, slough lignin.The import and export distance of boiling pipe is 10000mm, to increase the adjustable range of boiling volume and digestion time.Helical design becomes the big and small blade of reducing displacement, arranges by the delignification rule of tablet in the boiling pipe, and the outstanding function that mixes is arranged, and digestion time can be regulated (frequency control) by the number of increase and decrease boiling pipe and the revolution speed of screw in the control boiling pipe.Motor and reductor direct connection can be saved the space.The slurry that is steamed into enters intervalve from boiling pipe end.Digestion time 45-75 minute (can regulate).
The intervalve domestic demand keeps certain liquid level, prevents that slurry and spraying pot from directly connecting.Liquid level realizes by the differential pressure transmitter indication and by the valve opening of regulating blow-off valve.
What intervalve connected is vertical discharger.The rotor that rotation is arranged in the discharger makes slurry successfully be discharged into spraying pot from blow-off valve.In order to save heat energy and to improve the quality of starching, boiling ends and adopts the cold technology of spurting, the rare black liquor (40-45 ℃) that is about to the heat exchanger cooling injects the discharger bottom, and slurry temperature is dropped to about suitable temperature value (95 ℃), spurts spraying pot under suitable concentration (about 6%).Heavy seeds in the discharger enters the trap of bottom and discharging regularly.
According to property of raw material, the present invention proposes suitable continuously boiling hollow palm fruit string fiber process conditions:
The chemical pulp cooking schedule
| Project | Index |
| Active alkali consumption % (Na 2The O meter) | 15～18 |
| The AQ consumption, % | 0.05 |
| Liquor ratio | 1∶4 |
| Pre-steaming time (130-140 ℃) min | 45 |
| Digestion time min | 45～75 |
| Boiling maximum temperature ℃ | 160～180 |
Cooking schedule is done suitably to adjust, also can produce the semi-chemical pulp of be fit to manufacture paper with pulp kraft paperboard and high-strength corrugated base paper, proposed continuously boiling hollow palm fruit string fiber semi-chemical pulp cooking schedule among the present invention simultaneously:
The semi-chemical pulp cooking schedule
| Project | Index |
| Active alkali consumption % (Na 2The O meter) | 5-8 |
| The AQ consumption, % | 0.05 |
| Liquor ratio | 1∶4 |
| Pre-steaming time (130-1400C) min | 20 |
| Digestion time min | 20～40 |
| Boiling maximum temperature ℃ | 160 |
2, washing and black liquid extraction
Slurry washing and black liquid extraction are taked counter flow washing, and according to the water filtering performance of this raw material, the equipment of employing can wash also available many Double screw pulp extruder counter flow washings with many vacuum pulp washing machine series connection.For guaranteeing the wash degree of slurry, should make more than the extraction rate reached to 90% of black liquor.According to pulping process and production-scale difference, the concentrated black liquid that slurrying produces can adopt black-liquor combustion method technology, both can eliminate the pollution of black liquor of pulp making, carries out the recovery of chemicals and the reuse of heat energy simultaneously.Also can utilize black liquor to produce byproducts such as sodium lignosulfonate.
3, screening, purification
Clean disposed slurry must screen, purified treatment, to remove the weight impurity in the slurry.This method screening installation adopts pressurized screen, and cleaning equipment adopts low dense desander.
4, bleaching
If produce cultural paper, must further bleach processing to the slurry after screening, the purification.The present invention proposes the method for bleaching and the process conditions that are fit to the hollow palm fruit string fiber characteristics.
Method for bleaching adopts CEH tri-stage bleaching flow process, and its each section dosage and concentration of treatment are as follows:
5, making beating
The purpose of making beating is to improve interfibrous bond strength.According to the difference of producing the paper kind, the beating degree of being controlled is also different.The Production and Packaging cardboard, as kraft paperboard and high-strength corrugated base paper, its beating degree is 35～45oSR, produces cultural paper, its beating degree is 40～80oSR.
6, copy paper
The process of copying paper comprises that moulding, squeezing, drying and the press polish of constant part, page batch etc.
The present invention is characterized in the different of boiling mode and cooking schedule, the equipment of use all adopts conventional pulping and papermaking equipments.
Provide the example that adopts continuously cooking mode of the present invention and cooking schedule true qualities and two kinds of chemical pulp cooking schedules of bleaching and pulp property below respectively:
1, continuously boiling hollow palm fruit string fiber true qualities chemical pulp cooking schedule and pulp property
Continuously boiling hollow palm fruit string fiber true qualities chemical pulp cooking schedule and boiling result
Continuously boiling hollow palm fruit string fiber true qualities chemical pulp pulpability
As above shown in the table, adopt pulping process of the present invention and cooking schedule, advantage such as prepared paper pulp has the yield height, and intensity is good, and Kappa number is low.Hollow palm fruit string fiber can adopt the alkaline process continuous steaming-boiling technology to make comparatively excellent in chemical slurry of performance fully.
2. continuously boiling hollow palm fruit string fiber chemical pulp bleaching conditions and pulp property
Continuously boiling hollow palm fruit string fiber true qualities chemical pulp bleaching conditions and result are as follows:
Continuously boiling hollow palm fruit string fiber chemical pulp CEH tri-stage bleaching pulpability
Adopt CEH tri-stage bleaching method of the present invention and process conditions, fine hollow palm fruit string dimension raw material alkaline process chemical pulp can be bleached to higher whiteness, and chlorine dosage is lower, and pulp quality is good, but opacity is low slightly.
From above index as can be seen, hollow palm fruit string dimension dimension raw material can adopt production method of the present invention and process conditions to make the comparatively good paper pulp of performance fully.It is good that the paper that makes has bond strength, becomes bright and clean level and smooth, the tightness of paper than characteristics such as height.Multiple class pulpboard, paper and board product can be used to manufacture paper with pulp.
Claims (4)
1, a kind of continuously boiling hollow palm fruit string fiber pulp and paper making method by boiling, slurry washing and black liquid extraction, screening, purification, beating process, is made the hollow palm fruit string fiber slurry, and manufacture paper with pulp packing board and various production cultural paper is characterized in that:
(1) hollow palm fruit string fiber adopts continuous cooking method to make chemical pulp or semi-chemical pulp,
The system chemical pulp adopts following process conditions:
The active alkali consumption is with Na
2O counts 15%～20%,
The AQ consumption is 0.03%～0.06%,
Liquor ratio is 1:3～1:4,
The pre-steaming time is under 130 ℃-140 ℃ temperature conditions, 20 minutes～45 minutes,
Digestion time is 45 minutes～75 minutes,
Boiling maximum temperature: 160 ℃～180 ℃;
The system semi-chemical pulp adopts following process conditions:
The active alkali consumption is with Na
2O counts 5%～8%,
The AQ consumption is 0.02%～0.05%,
Liquor ratio is 1:3～1:4,
The pre-steaming time is under 130 ℃-140 ℃ condition 20 minutes～45 minutes,
Digestion time is 20 minutes～40 minutes,
The boiling maximum temperature is 160 ℃～170 ℃;
(2) slurry washing and black liquid extraction are taked the counter flow washing method;
(3) adopt pressurized screen screening slurry;
(4) adopt low dense desander to purify slurry;
(5) process of copying paper comprises moulding, squeezing, the drying of starching, page.
2, according to the described continuously boiling hollow palm fruit string fiber pulp and paper making method of claim 1, it is characterized in that the chemical pulp that makes is bleached, method for bleaching adopts CEH tri-stage bleaching flow process, and its each section dosage and treatment conditions are as follows:
The C section: medication is Cl
2, dosage is 2%～3.5%, and reaction density is 3%～5%, and reaction temperature is a room temperature, and the reaction time is 40 minutes～70 minutes;
The E section: medication is NaOH, and dosage is 1%～3%, and reaction density is 10%～15%, and reaction temperature is 55 ℃～75 ℃, and the reaction time is 40 minutes～70 minutes;
The H section: medication is NaClO, and dosage is 3%～5%, and reaction density is 10%～15%, and reaction temperature is 35 ℃～45 ℃, and the reaction time is 110 minutes～150 minutes.
3, according to the described continuously boiling hollow palm fruit string fiber pulp and paper making method of claim 1, it is characterized in that the semi-chemical pulp Production and Packaging cardboard that makes, its beating degree is 30 °～45 ° SR.
4, according to the described continuously boiling hollow palm fruit string fiber pulp and paper making method of claim 1 or 2, it is characterized in that the chemical pulp that makes is suitable for producing cultural paper after bleaching, its beating degree is 40 °～80 ° SR.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100607369A CN100497810C (en) | 2005-09-12 | 2005-09-12 | Pulp and paper making method by continuously boiling hollow palm fruit string fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100607369A CN100497810C (en) | 2005-09-12 | 2005-09-12 | Pulp and paper making method by continuously boiling hollow palm fruit string fiber |
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| CN1737254A CN1737254A (en) | 2006-02-22 |
| CN100497810C true CN100497810C (en) | 2009-06-10 |
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| CNB2005100607369A Expired - Fee Related CN100497810C (en) | 2005-09-12 | 2005-09-12 | Pulp and paper making method by continuously boiling hollow palm fruit string fiber |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696306B (en) * | 2013-12-17 | 2015-10-21 | 中南林业科技大学 | A kind of oil-tea camellia fruit shell semi-chemical pulp preparation technology |
| CN105178085A (en) * | 2015-09-21 | 2015-12-23 | 潍坊恒联浆纸有限公司 | Poplar pulp black liquor green extraction process |
| CN113026409A (en) * | 2021-03-29 | 2021-06-25 | 边静 | Method for preparing biological sulfur-free semi-chemical pulp by using palm fibers |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1110053A (en) * | 1964-04-25 | 1968-04-18 | Financement Sonafi Soc Nat De | Improvements in or relating to methods of preparing cellulose pulp, notably paper pulp, and products thus obtained and materials deriving therefrom |
| CN1332293A (en) * | 2001-08-24 | 2002-01-23 | 上海普豪经贸有限公司 | Pulping and paper-making process with palm shell as raw material |
-
2005
- 2005-09-12 CN CNB2005100607369A patent/CN100497810C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1110053A (en) * | 1964-04-25 | 1968-04-18 | Financement Sonafi Soc Nat De | Improvements in or relating to methods of preparing cellulose pulp, notably paper pulp, and products thus obtained and materials deriving therefrom |
| CN1332293A (en) * | 2001-08-24 | 2002-01-23 | 上海普豪经贸有限公司 | Pulping and paper-making process with palm shell as raw material |
Non-Patent Citations (2)
| Title |
|---|
| 吉林研究新的制浆造纸原料--棕榈筋. 陈霞.造纸信息，第2期. 1996 |
| 吉林研究新的制浆造纸原料--棕榈筋. 陈霞.造纸信息，第2期. 1996 * |
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Address after: 310004 No. 71, Stadium Road, Hangzhou, Zhejiang Patentee after: HMEI MACHINERY & ENGINEERING Co. Address before: 310004 No. 71, Stadium Road, Hangzhou, Zhejiang Patentee before: HANGZHOU PROJECT & Research Institute OF ELECTRO MECHANIC IN LIGHT INDUSTRY |
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Address after: Room 428, building 4, No. 970-1, Gaojiao Road, Wuchang Street, Yuhang District, Hangzhou City, Zhejiang Province Patentee after: HMEI MACHINERY & ENGINEERING Co. Address before: 310004 No. 71, Stadium Road, Hangzhou, Zhejiang Patentee before: HMEI MACHINERY & ENGINEERING Co. |
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Granted publication date: 20090610 Termination date: 20210912 |