CN102561080A - Improved P-RC APMP (preconditioning-refining chemical alkaline peroxide mechanical pulp) new flow path - Google Patents
Improved P-RC APMP (preconditioning-refining chemical alkaline peroxide mechanical pulp) new flow path Download PDFInfo
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- CN102561080A CN102561080A CN2012100643863A CN201210064386A CN102561080A CN 102561080 A CN102561080 A CN 102561080A CN 2012100643863 A CN2012100643863 A CN 2012100643863A CN 201210064386 A CN201210064386 A CN 201210064386A CN 102561080 A CN102561080 A CN 102561080A
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Abstract
The invention provides an improved P-RC APMP (preconditioning-refining chemical alkaline peroxide mechanical pulp) pulping new flow path, which is characterized in that three or four in-series double helix press masters are added behind a conventional P-RC APMP flow path bleaching tower to extract a bleaching waste liquid, the gross extraction efficiency of the waste liquid is 80-95%, the improved P-RC APMP pulping new flow path is small in water consumption when the waste liquid is extracted, the extracted waste liquid is high in solid content, within the range of 4.0-8.0%, and the extracted waste liquid is processed by means of alkali recovery, so that the steam use level when the waste liquid is concentrated by means of alkali recovery can be reduced, the washing load of the pulp at a follow-up washing workshop section can be reduced, and the negative influence of anionic trash in the pulp to a wet part of a paper section paper machine can be further reduced simultaneously.
Description
One, technical field:
The present invention relates to a kind of improved P-RC APMP slurrying new technological process.
Two, background technology:
P-RC APMP is the classical slurrying flow process in the chemi-mechanical pulp, and P-RC APMP pulping process flow is: length 15～20mm, thickness 3～5mm, width are removed silt less than the wood chip of 10mm through water washing; Use the inclined screw Water Extraction Machinery to make the wood chip mass dryness fraction reach 30～40%; Utilizing compression ratio is that 1: 4.0 extruding and tearing machine is squeezed into the wood wool shape with wood chip; To push the back wood chip and impregnated in the alkaline hydrogen peroxide solution that contains chelating agent (DTPA), magnesium sulfate, sodium metasilicate, accounts for total consumption 20～40%, get into reaction warehouse reaction 30～60min; The reaction disposed slurry carries out high consistency refining one time under 35～40% concentration; Get into high dense blender behind the defibrination and contain chelating agent (DTPA), magnesium sulfate, sodium metasilicate, the alkaline hydrogen peroxide solution that accounts for total consumption 60～80% mixes, gets into bleaching tower and reacts 1.5～2.0h, bleaching concentration is 30～35%; Be diluted to concentration after bleaching finishes and be 3～6% and get into the latent pond that disappears, the low dense defibrination of secondary is carried out in the back of diving of disappearing under 3～6% concentration; Mill back slurry carries out three sections screenings under 2～4% concentration; The screening disposed slurry carries out slurry washing through the polydisc wash engine; Last diluted slurry concentration is 4.5～10% subsequent use.
P-RC APMP pulping process uses hydrogen peroxide as bleaching agent; Alkaline hydrogen peroxide bleaching is the bleaching that keeps lignin; Be accompanied by bleaching process and can produce bleaching waste liquor; Contain oxidation lignin and polygalacturonic acid that the reaction of hydrogen peroxide and lignin, pectin generates in the waste liquid, and disperse in defibrination and the bleaching process or anionic trashes such as the resin acid of stripping and aliphatic acid colloid.Behind the low dense latent pond that disappears of the bleaching waste liquor entering 3～6% that produces in the reaction warehouse behind one section dipping and the bleaching tower of double-steeping; Concentration is diluted; The washing overload that causes the polydisc wash engine, not thorough to the washing of slurry, a large amount of anionic trashes are trapped in the slurry.And these electronegative polygalacturonic acids; The dispersion micelle of lignin macromolecule and extract can get into slurry and copy paper system; Can in the white-water system of paper machine, accumulate; Reduce the effect of retention and drainage aid agent, increase the consumption of wet end system anionic trash trapping agent, operation brings unstability to wet end.
Three, summary of the invention:
The present invention provides a kind of improved P-RC APMP new technological process, can 80%～95% bleaching waste liquor that produce in reaction warehouse and the bleaching tower be extracted and send the alkali recycling, and the leaching process water consumption is few, and the waste liquid solid content that extracts is high, 4.0%～8.0%; Can reduce waste liquid alkali and reclaim the steam consumption in the concentration process, can alleviate the washing load of slurry again, significantly reduce anionic trash simultaneously at the negatively influencing of machine hand's section to wet end of machine in subsequent wash workshop section.
To achieve these goals, technical scheme of the present invention is:
1, wood chip washing: length 15～20mm, thickness 3～5mm, width are removed silt less than the wood chip of 10mm through water washing;
2, wood chip dehydration, extruding and tearing: use the inclined screw Water Extraction Machinery to make the wood chip mass dryness fraction reach 35～40%; Utilizing compression ratio is that 1: 4.0 extruding and tearing machine is squeezed into the wood wool shape with wood chip;
3, one section dipping: will push the back wood chip and impregnated in the alkaline hydrogen peroxide solution that contains chelating agent (DTPA), magnesium sulfate, sodium metasilicate, accounts for total consumption 20～40%, and get into reaction warehouse reaction 30～60min;
4, one section high consistency refining: the reaction warehouse disposed slurry carries out high consistency refining one time under 35～40% concentration;
5, high density hypo tower: mill back slurry get into high dense blender and contain chelating agent (DTPA), magnesium sulfate, sodium metasilicate, the alkaline hydrogen peroxide solution that accounts for total consumption 60～80% mixes, gets into bleaching tower and reacts 1.5～2.0h, bleaches concentration 30～35%;
6, three or four series connection Double screw pulp extruders extraction waste liquids: bleaching back slurry uses the Double screw pulp extruder extraction waste liquid of three or four series connection; The inlet concentration of every Double screw pulp extruder is 15%～25%; Exit concentration adds clear water 35%～40% from last, and the total recovery rate of waste liquid is 80～95%; The waste liquid solid content of extracting is 4.0～8.0%, and waste liquid send the alkali recycling;
7, latent, the low dense defibrination that disappears: it is 3～6% to get into the latent pond that disappears that slurry is diluted to concentration, and the low dense defibrination of secondary is carried out in the back of diving of disappearing under 2～4% concentration;
8, screening: mill back slurry carries out three sections screenings under 2～4% concentration;
9, washing: screening back slurry is the washing of process polydisc wash engine under 1%～2% concentration;
10, storage slurry is subsequent use: will wash the disposed slurry mass dryness fraction and transfer to 4.5～10% subsequent use;
Four, description of drawings
Fig. 1, Fig. 2 are improved P-RCAPMP technology new technological process sketch.
Five, the specific embodiment
Embodiment one: the improved P-RC APMP of the present invention technology new technological process combines Fig. 1 to explain as follows:
1, wood chip washing: length 15～20mm, thickness 3～5mm, width are removed silt less than the wood chip of 10mm through water washing;
2, wood chip dehydration, extruding and tearing: use the inclined screw Water Extraction Machinery to make the wood chip mass dryness fraction reach 35～40%; Utilizing compression ratio is that 1: 4.0 extruding and tearing machine is squeezed into the wood wool shape with wood chip;
3, one section dipping: will push the back wood chip and impregnated in the alkaline hydrogen peroxide solution that contains chelating agent (DTPA), magnesium sulfate, sodium metasilicate, accounts for total consumption 20～40%, and get into reaction warehouse reaction 30～60min;
4, one section high consistency refining: the reaction warehouse disposed slurry carries out high consistency refining one time under 35～40% concentration;
5, high density hypo tower: mill back slurry get into high dense blender and contain chelating agent (DTPA), magnesium sulfate, sodium metasilicate, the alkaline hydrogen peroxide solution that accounts for total consumption 60～80% mixes, gets into bleaching tower and reacts 1.5～2.0h, bleaches concentration 30～35%;
6, four series connection Double screw pulp extruders extract waste liquid: bleaching back slurry uses the Double screw pulp extruder of four series connection to extract waste liquid; The inlet concentration of every Double screw pulp extruder is 15%～25%; Exit concentration is 35%～40%, and from the 4th adding clear water, the total recovery rate of waste liquid is 85～95%; The waste liquid solid content of extracting is 4.0～8.0%, and waste liquid send the alkali recycling;
7, latent, the low dense defibrination that disappears: slurry is diluted to concentration 3～6% and gets into the latent pond that disappears, and the low dense defibrination of secondary is carried out in the back of diving of disappearing under 2～4% concentration;
8, screening: mill back slurry carries out three sections screenings under 2～4% concentration;
9, washing: screening back slurry is the washing of process polydisc wash engine under 1%～2% concentration;
10, storage slurry is subsequent use: will wash the disposed slurry mass dryness fraction and transfer to 4.5～10% subsequent use.
Embodiment two: the improved P-RC APMP of the present invention technology new technological process combines Fig. 2 to explain as follows:
1, wood chip washing: length 15～20mm, thickness 3～5mm, width are removed silt less than the wood chip of 10mm through water washing;
2, wood chip dehydration, extruding and tearing: use the inclined screw Water Extraction Machinery to make the wood chip mass dryness fraction reach 35～40%; Utilizing compression ratio is that 1: 4.0 extruding and tearing machine is squeezed into the wood wool shape with wood chip;
3, one section dipping: will push the back wood chip and impregnated in the alkaline hydrogen peroxide solution that contains chelating agent (DTPA), magnesium sulfate, sodium metasilicate, accounts for total consumption 20～40%, and get into reaction warehouse reaction 30～60min;
4, one section high consistency refining: the reaction warehouse disposed slurry carries out high consistency refining one time under 35～40% concentration;
5, high density hypo tower: mill back slurry get into high dense blender and contain chelating agent (DTPA), magnesium sulfate, sodium metasilicate, the alkaline hydrogen peroxide solution that accounts for total consumption 60～80% mixes, gets into bleaching tower and reacts 1.5～2.0h, bleaches concentration 30～35%;
6, three series connection Double screw pulp extruders extract waste liquid: bleaching back slurry uses three series connection Double screw pulp extruders to extract waste liquid; The inlet concentration of every Double screw pulp extruder is 15%～25%; Exit concentration is 35%～40%, and from the 3rd adding clear water, the total recovery rate of waste liquid is 80～90%; The waste liquid solid content of extracting is 4.0～8.0%, and waste liquid send the alkali recycling;
7, latent, the low dense defibrination that disappears: slurry is diluted to concentration 3～6% and gets into the latent pond that disappears, and the low dense defibrination of secondary is carried out in the back of diving of disappearing under 2～4% concentration;
8, screening: mill back slurry carries out three sections screenings under 2～4% concentration;
9, washing: screening back slurry is the washing of process polydisc wash engine under 1%～2% concentration;
10, storage slurry is subsequent use: will wash the disposed slurry mass dryness fraction and transfer to 4.5～10% subsequent use.
Claims (1)
1. improved P-RC APMP new technological process, its new technological process is characterised in that:
1) wood chip washing: length 15～20mm, thickness 3～5mm, width are removed silt less than the wood chip of 10mm through water washing;
2) wood chip dehydration, extruding and tearing: use the inclined screw Water Extraction Machinery to make the wood chip mass dryness fraction reach 35～40%; Utilizing compression ratio is that 1: 4.0 extruding and tearing machine is squeezed into the wood wool shape with wood chip;
3) one section dipping: will push the back wood chip and impregnated in the alkaline hydrogen peroxide solution that contains chelating agent (DTPA), magnesium sulfate, sodium metasilicate, accounts for total consumption 20～40%, and get into reaction warehouse reaction 30～60min;
4) one section high consistency refining: the reaction warehouse disposed slurry carries out high consistency refining one time under 35～40% concentration;
5) high density hypo tower: mill back slurry get into high dense blender and contain chelating agent (DTPA), magnesium sulfate, sodium metasilicate, the alkaline hydrogen peroxide solution that accounts for total consumption 60～80% mixes, gets into bleaching tower and reacts 1.5～2.0h, bleaches concentration 30～35%;
6) three or four series connection Double screw pulp extruders extraction waste liquids: bleaching back slurry uses three or four Double screw pulp extruders of connecting to extract waste liquids; The inlet concentration of every Double screw pulp extruder is 15%～25%; Exit concentration adds clear water 35%～40% from last, and the total recovery rate of waste liquid is 80～95%; The waste liquid solid content of extracting is 4.0～8.0%, and waste liquid send the alkali recycling;
7) latent, the low dense defibrination that disappears: it is 3～6% to get into the latent pond that disappears that slurry is diluted to concentration, and the low dense defibrination of secondary is carried out in the back of diving of disappearing under 2～4% concentration;
8) screening: mill back slurry carries out three sections screenings under 2～4% concentration;
9) washing: screening back slurry is the washing of process polydisc wash engine under 1%～2% concentration;
10) storage slurry is subsequent use: will wash the disposed slurry mass dryness fraction and transfer to 4.5～10% subsequent use.
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| CN2012100643863A CN102561080A (en) | 2012-03-13 | 2012-03-13 | Improved P-RC APMP (preconditioning-refining chemical alkaline peroxide mechanical pulp) new flow path |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103757955A (en) * | 2014-01-06 | 2014-04-30 | 南京林业大学 | Novel alkaline peroxide mechanical pulp technology improving method for improving pulp strength |
| CN104389214A (en) * | 2014-10-28 | 2015-03-04 | 广西大学 | Method for preparing APMP (Alkaline Peroxide Mechanical Pulp) by utilizing fresh bamboos |
| CN104703718A (en) * | 2012-09-27 | 2015-06-10 | 安德里兹有限公司 | Chemical treatment of lignocellulosic fiber bundle material, and methods and systems relating thereto |
| CN107119479A (en) * | 2014-11-18 | 2017-09-01 | 沙良宝 | A kind of low dissolved salt cleaning paper pulp and preparation method thereof |
| CN110144746A (en) * | 2019-05-22 | 2019-08-20 | 山东天和纸业有限公司 | A kind of wheat straw production technology and its production equipment |
| CN113123173A (en) * | 2021-04-22 | 2021-07-16 | 江苏博汇纸业有限公司 | Natural color machine pulp high-loose white board paper and production technology |
| CN114351486A (en) * | 2021-12-30 | 2022-04-15 | 江苏博汇纸业有限公司 | Formula anti-scaling chemi-mechanical pulp line production system is added to plain boiled water back end |
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| US7736463B1 (en) * | 1999-03-08 | 2010-06-15 | Holmen Aktiebolag | Method for manufacturing bleached mechanical and chemithermomechanical pulp |
| CN101748634A (en) * | 2009-12-16 | 2010-06-23 | 陕西科技大学 | Improved APMP pulping method |
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2012
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104703718A (en) * | 2012-09-27 | 2015-06-10 | 安德里兹有限公司 | Chemical treatment of lignocellulosic fiber bundle material, and methods and systems relating thereto |
| CN103757955A (en) * | 2014-01-06 | 2014-04-30 | 南京林业大学 | Novel alkaline peroxide mechanical pulp technology improving method for improving pulp strength |
| CN103757955B (en) * | 2014-01-06 | 2016-08-24 | 南京林业大学 | A kind of APMP technique of improving improves the new method of pulp strength |
| CN104389214A (en) * | 2014-10-28 | 2015-03-04 | 广西大学 | Method for preparing APMP (Alkaline Peroxide Mechanical Pulp) by utilizing fresh bamboos |
| CN107119479A (en) * | 2014-11-18 | 2017-09-01 | 沙良宝 | A kind of low dissolved salt cleaning paper pulp and preparation method thereof |
| CN107119479B (en) * | 2014-11-18 | 2020-07-10 | 沙良宝 | Low-salt-dissolving clean paper pulp and preparation method thereof |
| CN110144746A (en) * | 2019-05-22 | 2019-08-20 | 山东天和纸业有限公司 | A kind of wheat straw production technology and its production equipment |
| CN113123173A (en) * | 2021-04-22 | 2021-07-16 | 江苏博汇纸业有限公司 | Natural color machine pulp high-loose white board paper and production technology |
| CN114351486A (en) * | 2021-12-30 | 2022-04-15 | 江苏博汇纸业有限公司 | Formula anti-scaling chemi-mechanical pulp line production system is added to plain boiled water back end |
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