CN103046417B - Coated white board pulping process low in energy consumption - Google Patents
Coated white board pulping process low in energy consumption Download PDFInfo
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- CN103046417B CN103046417B CN201210541421.6A CN201210541421A CN103046417B CN 103046417 B CN103046417 B CN 103046417B CN 201210541421 A CN201210541421 A CN 201210541421A CN 103046417 B CN103046417 B CN 103046417B
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Abstract
The invention belongs to the technical field of coated white board pulping methods. A coated white board pulping process low in energy consumption is in separated and segmented pulping mode and comprises surface pulp pulping, lining pulp pulping, core pulp pulping and bottom pulp pulping. Bottom pulp and core pulp respectively undergo intermediate-concentration continuous disintegration, and the concentration is 4-5%; lining pulp undergoes high-concentration disintegration, and the concentration is 13-18%; when the beating degree of surface pulp reaches or exceeds 45 degree SR at any production stage, knife-adding pulping is not performed, and pulp is only defibered to pass through a production line; and when the beating degree of the lining pulp, the beating degree of the core pulp and the beating degree of the bottom pulp reach 35 degree SR at any production stage, knife-adding pulping is not performed, and the pulp is only defibered to pass through the production line. A mode completely different from the tradition is adopted in the coated white board pulping process, corresponding adjustment is performed on several key control indexes, and not only is energy consumption reduced, but also follow-up papermaking quality is improved.
Description
Technical field
The invention belongs to the blank preparation technics technical field of coated white paperboard.
Background technology
Waste paper type of production papermaking enterprise all needs heat partition system to process slurry, to improve the quality of finished paper.Rubbing type heat partition system adopts the combination of inclined screw and propelling worm to concentrate slurry, is the mainstream configuration of domestic papermaking enterprise, requires into slurry concentration 3.5 ~ 4.5%, reaches more than 28% after concentrated.This equipment initial operating stage effect is all right.But after running several years, pulp concentration can only maintain 16 ~ 18%, and main cause one is the screen cylinder appearance wearing and tearing for concentrated spiral and dehydration, causes the gap between spiral and screen cylinder to become large, the action effect concentrated to slurry extruding is deteriorated, and reduces pulp concentration; Two is that paper machine room output constantly promotes, cause the disposal ability of heat partition relatively on the low side, in order to ensure the supply that core is starched, general all selection amplifies outlet, sacrifice concentration, simultaneously because the gap of spiral and screen cylinder in last bar becomes greatly, cause the Negotiation speed of slurry to slow down further, thus form vicious circle; Three is that domestic waste paper recycle number of times constantly increases, and stock freeness declines, and fiber is too short, and the dehydration property of slurry is declined, and screen cylinder blocks by too much staple fibre simultaneously, has a strong impact on the treatment effect of spiral shove equipment.
The appearance of above-mentioned situation, bring to the normal production in workshop and have a strong impact on, be mainly reflected in the following aspects: (1) concentrated concentration is too low, cause the rubbing poor effect of heat partition, ink point residual in slurry and wax point more, causing when manufacturing paper with pulp the dewatering efficiency of forming web to decline, increasing the probability of web break, affecting the normal production of paper machine and the stability of finished paper quality.(2) because slurry concentration is too low, in the slurry passed through in unit interval with moisture will increase, thus cause the quantity of steam significant proportion consumed during heat partition system heating to consume in the heating of water, and the rising of temperature that equipment rubbing slurry causes also becomes not obvious, these two reasons cause the steam consumption of this heat partition system greatly to increase.
In existing white board slurrying production technology, prime cement, core slurry continuous disperse concentration is on the low side, and only have 2-3%, production capacity is low, and energy ezpenditure is large.The high dense size degradation concentration of lining slurry is about 12%, and temperature about 70 DEG C, deinking cost is 120-140 yuan/ton of slurry, costly.In core slurry flow process, be fan pump after header box, then enter three sections of desanders, then enter low dense ripple pressurized screen, finally arrive gravity concentration Water Extraction Machinery.Because the concentration entering pressurized screen is too low, the concentration going out pressurized screen is just lower, and screening effeciency is not good.
In addition, at pulp stage, the operation of making beating will adjust in time according to the change of supplied materials.Especially secondary stock, source is complicated, and quality fluctuation is comparatively large, if beating degree controls unreasonable, all has a significant impact paper quality and energy consumption.
Summary of the invention
Object of the present invention solves the problem exactly, based on the part wood pulp generally adopted according to existing coated white paperboard and mixed waste paper raw material, there is provided a kind of to improve in prior art processes, significantly improve the new pulping process that pulp quality and energy consumption obviously reduce.
For reaching above-mentioned purpose, the technical scheme that the present invention takes is as follows:
A kind of low energy consumption coated white paperboard pulping process, is characterized in taking separately and the mode of segmentation making beating, comprises starch adhesive making beating, the making beating of lining slurry, the making beating of core slurry and prime cement making beating, wherein, prime cement and core starch and take respectively in dense continuous disperse, concentration is 4-5%; Lining slurry takes high dense size degradation, concentration 13-18%; Deduction degree when a starch adhesive production phase in office meets or exceeds 45
0do not add cutter making beating during SR, only allow slurry discongest by production line, lining slurry, core slurry and the deduction degree of a prime cement production phase in office reach 35
0do not add cutter making beating during SR, only allow slurry discongest and pass through production line.
Above-mentioned low energy consumption coated white paperboard pulping process, in core slurry preparation flow, is high dense ripple pressurized screen after header box, then enters three sections of desanders, then enter low dense ripple pressurized screen, finally arrive gravity concentration Water Extraction Machinery.So not only can omit fan pump, the more important thing is and reduce a large amount of circulations of water, reduce power consumption, and screening, purification efficiency are also high to some extent.
Above-mentioned low energy consumption coated white paperboard pulping process, all adopts high dense (25-30%), the concentrated heat partition system of high temperature (80-110 DEG C) folder net, can effectively improve ink particle clearance, ensure that pulp concentration, improve the operational efficiency of follow-up paper machine.Further, change existing process pipe, the concentrated plain boiled water of folder net is directly entered stock tank after heat partition, while diluted slurry, decrease discharge of wastewater.
Beneficial effect of the present invention: the present invention takes with tradition diverse mode on coated white paperboard beating process, not only reduces energy consumption, further improves follow-up copy paper quality, specific as follows:
(1) by the pressure of adjustment pressurization pneumatic tyre and the speeds control pulp concentration of folder network operation, the situation that therefore there will not be the too small concentrated effect in traditional gap to decline, ensure that exit concentration is more than 28%.
(2) heat steam used greatly to reduce, reduce a ton paper cost.And stabilize stock quality, reduce dirt count further, reduce the quality problems such as printing dry linting.
(3) ton slurry power consumption declines.The consumable accessory of folder net equipment is two layers polyester net (or the dry net of spiral), and standby redundancy expense also reduces greatly compared with spiral shove mode.
(4) former dewatering net only need be taken away by the maintenance draping of pressing from both sides net concentrator, and be inserted in new dewatering net, required time is shorter, flexibly and easily, is convenient to workshop and arranges maintenance, reduce labour intensity, improve paper machine operation efficiency.
(5) the present invention takes the mode of separately making beating, and the feature for different waste paper is pulled an oar, and strictly controls beating degree, ensures stock quality.Such as, the long fine slurry of starch adhesive can get to 40
0more than SR, can evenly be shaped when being beneficial to online, and the fluff pulp of waste paper too much cuts off and can affect its intensity, a large amount of fiber fines, also reduces into the bulk of paper, and adds and dehydrate cost, therefore hardwood beating is with 35
0about SR is advisable.Making beating power consumption is reduced to 15-20 KWh/ton of slurry from 30-35 KWh/ton of slurry by the making beating mode of this separately refinement, and energy-saving effect is obvious.The more important thing is, significantly can reduce the chance of fibre cutting, reduce into the tightness of paper, improve into the deflection of cardboard, improve into the strength character of paper.
Detailed description of the invention
The present embodiment manufactures low energy consumption coated white paperboard, and raw material is selected as follows:
Surface layer: main component is chemical bleaching wood pulp, a small amount of blank sheet of paper limit.
Lining: main component is give up import day and a small amount of 8# or 10# waste paper.
Sandwich layer: Main Ingredients and Appearance is import 3# waste paper and 11# waste paper mixed waste paper
Bottom: main component is import 8# waste paper, a small amount of domestic newspaper
Chemistry painting industry: Main Ingredients and Appearance is the auxiliary additives such as china clay, calcium carbonate, latex, and coating weight is about 25-45g/m
2, finished paper consumption per ton accounts for gross weight 8.5-15%.
Auxiliary chemical raw materials: Main Ingredients and Appearance is starch, rosin, aluminum sulfate, retention agent, water repellent agent, bactericide etc., and content is about 1.4g/m
2, consumption per ton accounts for gross weight 0.2-1.0%.
Slurrying flow process of the present invention is respectively:
1, starch adhesive is produced: wood pulp-chain scraper conveyor-hydrabrusher-high frequency fiber disintegrating mill-conical refiner-double disc refiner-add filler and outer back flow water pump (white water pump)-conical refiner four sections-fan pump-tailings chest (pressurized screen two sections)-head box of starch-stock proportioner-paper machine stock tank-machine in stock tank;
2, lining slurry is produced: outer back flow water pump (white water pump)-fan pump-tailings chest (pressurized screen two sections)-head box of waste paper-chain scraper conveyor-hydrabrusher (deinking medicine)-coarse classifier-high dense sand removing machine-single-effect separator-header box-one-level flotation cell-secondary floatation groove-liquid position regulating box-low dense desander three sections-pressurized screen-folder net concentrator-conical refiner-paper machine stock tank-machine;
3, core slurry is produced: outer back flow water pump (white water pump)-fan pump-pressurized screen (the tailings chest)-head box of waste paper-chain scraper conveyor-hydrabrusher (heavy slag chute, impurity separator)-high dense sand removing machine-single-effect separator two sections-header box-Gao dense ripple pressurized screen-low dense sand removing machine-pressurized screen---folder net concentrator---heat dispersion machine (steam)-conical refiner-paper machine stock tank-machine;
4, prime cement is produced: the production of grey prime cement has, waste paper-chain scraper conveyor-hydrabrusher-Gao dense sand removing machine-single-effect separator-header box-end dense sand removing machine-pressurized screen-folder net concentrator-high frequency fiber disintegrating mill-conical refiner double plate mill-stock proportioner-paper machine stock tank;
Wherein, serve as a contrast slurry and take high dense size degradation, concentration 13-18%; Prime cement and core slurry take respectively in dense continuous disperse, concentration is 4-5%; Beating degree when a starch adhesive production phase in office meets or exceeds 45
0do not add cutter making beating during SR, only allow slurry discongest by production line, lining slurry, core slurry and the beating degree of a prime cement production phase in office reach 35
0do not add cutter making beating during SR, only allow slurry discongest and pass through production line.
Above-mentioned low energy consumption coated white paperboard pulping process, in core slurry preparation flow, be that (Nanjing aircraft factory, Jining China one manufacture high dense ripple pressurized screen after header box, screening concentration reaches as high as 5%), then three sections of desanders are entered, enter low dense ripple pressurized screen again, finally arrive gravity concentration Water Extraction Machinery.So not only can omit fan pump, the more important thing is and reduce a large amount of circulations of water, reduce power consumption, and screening, purification efficiency are also high to some extent.
Above-mentioned low energy consumption coated white paperboard pulping process, all adopts high dense (25-30%), the concentrated heat partition system of high temperature (80-110 DEG C) folder net, can effectively improve ink particle clearance, ensure that pulp concentration, improve the operational efficiency of follow-up paper machine.The concentrated plain boiled water of folder net directly enters stock tank after heat partition, reduces discharge of wastewater while diluted slurry.
5, face, lining, core, prime cement pass through respective wet end dehydration forming respectively through after head box whitewashing, then drying is carried out at press section unipress, the drier roll that enters oven dry portion after 3 groups of squeezers of press section, then through sizing applicator applying glue, knife type coater is quantitatively coated with, carry out gloss finish through calender after further drying, be packaged into finished product warehouse-in after cutting finally by the arrangement of reel machine reel, paper cutter.
With existing product comparative analysis after slurry copy paper of the present invention:
Claims (2)
1. a low energy consumption coated white paperboard pulping process, it is characterized in that: take the mode of separating and segmentation is pulled an oar, comprise starch adhesive making beating, lining slurry is pulled an oar, making beating starched by core and prime cement making beating, wherein, prime cement and core slurry take respectively in dense continuous disperse, concentration is 4-5%; Lining slurry takes high dense size degradation, concentration 13-18%; Beating degree when a starch adhesive production phase in office meets or exceeds 45
0do not add cutter making beating during SR, only allow slurry discongest by production line, lining slurry, core slurry and the beating degree of a prime cement production phase in office reach 35
0do not add cutter making beating during SR, only allow slurry discongest and pass through production line; Be high dense ripple pressurized screen after header box, then enter three sections of desanders, then enter low dense ripple pressurized screen, finally arrive gravity concentration Water Extraction Machinery; Adopt that the height of 25-30% is dense, the concentrated heat partition system of high temperature folder net of 80-110 DEG C.
2. low energy consumption coated white paperboard pulping process as claimed in claim 1, is characterized in that: the folder net of the concentrated heat partition system of folder net concentrates plain boiled water and directly enters stock tank after heat partition.
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| CN201210541421.6A CN103046417B (en) | 2012-12-13 | 2012-12-13 | Coated white board pulping process low in energy consumption |
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| CN201210541421.6A CN103046417B (en) | 2012-12-13 | 2012-12-13 | Coated white board pulping process low in energy consumption |
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| CN103046417B true CN103046417B (en) | 2015-04-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103437232B (en) * | 2013-07-01 | 2016-06-29 | 浙江永泰纸业集团股份有限公司 | A kind of senior coated white paperboard production technology |
| CN103835179B (en) * | 2014-03-19 | 2016-06-08 | 苏州吉臣日用品有限公司 | Compound copies manufacturing pulp substrate and its preparation method |
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| US4732335A (en) * | 1983-11-30 | 1988-03-22 | Aktiebolaget Frotator | Apparatus for treating cellulose pulp with intermeshing disks and assymetrical pulp moving means |
| CN1396342A (en) * | 2002-08-08 | 2003-02-12 | 福建闽都纸业股份有限公司 | Preparing and process for high-coated (500-1000g/sq.m) white paperhoard |
| CN101333784A (en) * | 2008-07-30 | 2008-12-31 | 浙江永泰纸业集团股份有限公司 | Novel energy-conserving environment-protecting complete-regeneration coating white cardboard and method for preparing same |
| CN101838947A (en) * | 2010-04-22 | 2010-09-22 | 四川永丰纸业股份有限公司 | High concentration paper pulp grinding method and device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100175840A1 (en) * | 2007-06-12 | 2010-07-15 | Hart Peter W | High yield and enhanced performance fiber |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4732335A (en) * | 1983-11-30 | 1988-03-22 | Aktiebolaget Frotator | Apparatus for treating cellulose pulp with intermeshing disks and assymetrical pulp moving means |
| CN1396342A (en) * | 2002-08-08 | 2003-02-12 | 福建闽都纸业股份有限公司 | Preparing and process for high-coated (500-1000g/sq.m) white paperhoard |
| CN101333784A (en) * | 2008-07-30 | 2008-12-31 | 浙江永泰纸业集团股份有限公司 | Novel energy-conserving environment-protecting complete-regeneration coating white cardboard and method for preparing same |
| CN101838947A (en) * | 2010-04-22 | 2010-09-22 | 四川永丰纸业股份有限公司 | High concentration paper pulp grinding method and device |
Non-Patent Citations (1)
| Title |
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| 涂布白纸板生产中的节水节能措施;祝红丽 等;《中华纸业》;20070831;第28卷(第8期);74-76 * |
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