WO1990005208A1 - Procede permettant de reduire la consommation d'energie lors de la production mecanique de pate a papier - Google Patents

Procede permettant de reduire la consommation d'energie lors de la production mecanique de pate a papier Download PDF

Info

Publication number
WO1990005208A1
WO1990005208A1 PCT/SE1989/000636 SE8900636W WO9005208A1 WO 1990005208 A1 WO1990005208 A1 WO 1990005208A1 SE 8900636 W SE8900636 W SE 8900636W WO 9005208 A1 WO9005208 A1 WO 9005208A1
Authority
WO
WIPO (PCT)
Prior art keywords
pulp
paper pulp
water
process according
fibrous material
Prior art date
Application number
PCT/SE1989/000636
Other languages
English (en)
Inventor
Sven Ljungbo
Original Assignee
Sven Ljungbo
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from SE8900302A external-priority patent/SE8900302A0/sv
Application filed by Sven Ljungbo filed Critical Sven Ljungbo
Publication of WO1990005208A1 publication Critical patent/WO1990005208A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/02—Pretreatment of the raw materials by chemical or physical means

Definitions

  • thermomechanical TMP
  • chemothermomechanical chemothermomechanical or grinding methods
  • mechanical energy by increasing, with the so-called pressure- rinding method, the process temperature to such a degree as to cause it to amount, in the same way as with the TMP method, to about 120°C.
  • a further reduction in energy consumption has been achieved with the so-called super-pressure-grinding method by increasing the temperature to about - A ° C.
  • the present invention it is now possible to increase the saving cf mechanical energy by instead lowering the process temperature, with these and similar methods of producing paper pulp. Even a reduction to less than +5°C results in a 'certain saving. However, a considerable reduction in energy consumption is achieved if the temperature is lowered to 0°C or less.
  • the energy saving is maximised if the cavities in the raw fibrous material - with wood mainly lumina, and with stalks or leaves ' the corresponding channels - are filled entirely or partly with water, prior to freezing to a temperature of less than 0°C.
  • the raw fibrous material can be filled with water in various ways.
  • the raw fibrous material is fairly finely dispersed - wood chips, chopped stalks cr leaves - it is sufficient to let it lie in the water for some time.
  • one can accelerate the penetration of water by adding to the water 1 - 2 pro mille of some wetting agent and/or a similar amount of caustic soda solution or a different alkali. Also vibrating the ' aqueous mixture will speed up penetration of the water.
  • White-wood chips are introduced into a tank with water containing 0.1 sodium oleate and 0.1 9 ⁇ sodium " hydroxide.
  • a vibrator rod is lowered into the tank and vibrates its contents. Once most of the chips have sunk to the ground, the remaining chips are skimmed off, whereupon the water-filled chips from the bottom are taken up and centrifuged so as to remove the surface water. The chips are then frozen by blowing air at a temperature of -10°C through them.
  • the frozen chips are then defibrated within a defibrator cooled down to a temperature of -10°C, air at -10°C being likewise blown through said defibrator during the defibration process.
  • the fibrous mass obtained is again frozen to -10°C and then refined in a breaker roll refiner or turbo-refiner or perfecting engine or in another grinding apparatus, which is also cooled to -10°G.
  • soap residues are precipitated by means of aluminium sulphate or calcium chloride, before the pulp is used for the production of paper.
  • Wooden blocks are saturated with water by lowering them into the water containing soap and soda solution as in example 1 and evacuating the air from the tank at the same time as its contents are vibrated.
  • the water-logged wooden blocks are frozen to a temperature of -10°C, whereupon they are ground in a grinder, which is also kept at a temperature of -10°C.
  • the paper pulp produced is refined as in example 1.
  • Wooden chips are saturated with water as in example 1 and frozen* o a temperature of -30°C. Then they are lowered into methylchloride at the same temperature and subjected to powerful high-frequency vibrations or ultrasound.
  • Wooden chips are saturated with water by submersion in water and simultaneous vibration. Once most of the chips have sunk to the bottom, the remaining floating chips are skimmed off, whereupon the more or less water ⁇ logged chips which have sunk to the bottom are freed from surface water and frozen to a temperature between -5 and -30°C. However it is also possible, prior to the subsequent crushing process, to freeze the chips to lower temperatures, but this requires more energy without yielding any significant advantages.
  • the chips are frozen in known manner according to a process developed - by Infrasonik AB in Sweden, by causing the chips to drop over the bunch of cooling tubes in a vertical shaft while at the same time generating infrasound in the, shaft.
  • the frozen chips are crushed in a roll-type crusher or roller press, with the rollers and other devices which come into contact with the chips cooled so as to keep them at a temperature between -5 and ' -30°C.
  • This cooling effect can be brought about by blowing through cold air or by cooling fluid from a refrigeration machine flowing through ducts within the crushing tool.
  • stamping crushers vibrating crushers, vibrating rodmills, roller presses or roll-type crushers with vibrating rolls are suitable alternatives for conventional roll-type crushers, at the first stage of crushing.
  • other machines can be used for breaking up the water-logged, frozen raw fibrous material such as cutters for milling wood to thin chips, which, if constantly frozen, can readily be refined to paper pulp, hammer mills and other machines for disintegrating materials.
  • the process according to the invention can be combined with a light chemical treatment of the fibrous mass so as to achieve correspondence wi h CTMP.
  • This chemical treatment can then be applied either prior to freezing and defibration of the raw fibrous material or after the mechanical production of the paper pulp or so that. he chemical impregnation takes place prior to freezing - defibration, whereas heating with a view to carrying out the chemical process is effected after defibration or refining.
  • the process according to the invention of freezing the mass of water ⁇ logged fibres prior to mechanical processing of a fibrous raw material for paper and of processing at freezing temperatures can also be used for refining chemical paper pulp or of ground, TIv-P or CTMP pulp produced according to conventional methods.

Abstract

La présente invention se rapporte à un nouveau procédé de production de pâte à papier par des moyens mécaniques et de raffinage de la pâte à papier. Ledit procédé consiste à saturer d'eau les canaux, lumières ou pores du matériau fibreux brut, qui peut être constitué par du bois, de la paille, des feuilles végétales ou de la pâte à papier produite selon les techniques classiques, puis à congeler l'eau contenue dans les fibres pour la transformer en glace. Le traitement mécanique- qui peut être le défibrage ou le raffinage- est alors effectué à cette température de congélation.
PCT/SE1989/000636 1988-11-10 1989-11-07 Procede permettant de reduire la consommation d'energie lors de la production mecanique de pate a papier WO1990005208A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE8804069-6 1988-11-10
SE8804069 1988-11-10
SE8900302-4 1989-01-27
SE8900302A SE8900302A0 (sv) 1989-01-27 1989-01-27 Sätt att minska energiförbrukningen vid mekanisk framställning av pappersmassa

Publications (1)

Publication Number Publication Date
WO1990005208A1 true WO1990005208A1 (fr) 1990-05-17

Family

ID=26660347

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1989/000636 WO1990005208A1 (fr) 1988-11-10 1989-11-07 Procede permettant de reduire la consommation d'energie lors de la production mecanique de pate a papier

Country Status (2)

Country Link
AU (1) AU4509789A (fr)
WO (1) WO1990005208A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100441773C (zh) * 2006-11-21 2008-12-10 华南理工大学 超声用于生产精制浆的方法
CN100500992C (zh) * 2006-11-21 2009-06-17 华南理工大学 一种精制浆的生产方法
WO2013034811A1 (fr) * 2011-09-07 2013-03-14 Upm-Kymmene Corporation Procédé de fabrication d'un composant de matériau, composant de matériau et son utilisation et produit de papier
CN107419575A (zh) * 2017-07-31 2017-12-01 安徽博大纤维素科技有限公司 一种基于麦草进行木质纤维素制备的方法
CN107503207A (zh) * 2017-07-31 2017-12-22 安徽博大纤维素科技有限公司 一种基于花生外壳制备木质纤维素的方法
CN108951246A (zh) * 2018-08-20 2018-12-07 盐城名杰纸品包装有限公司 一种用于纸品生产制备的纸浆混合装置
CN109082919A (zh) * 2018-09-20 2018-12-25 淮安天然丝纺织科技有限公司 原浆纸粉碎方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE36077C1 (fr) * 1914-01-14
GB267226A (en) * 1925-12-12 1927-03-14 Horace Walker Improvements in the economic manufacture of cellulose

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE36077C1 (fr) * 1914-01-14
GB267226A (en) * 1925-12-12 1927-03-14 Horace Walker Improvements in the economic manufacture of cellulose

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100441773C (zh) * 2006-11-21 2008-12-10 华南理工大学 超声用于生产精制浆的方法
CN100500992C (zh) * 2006-11-21 2009-06-17 华南理工大学 一种精制浆的生产方法
WO2013034811A1 (fr) * 2011-09-07 2013-03-14 Upm-Kymmene Corporation Procédé de fabrication d'un composant de matériau, composant de matériau et son utilisation et produit de papier
CN107419575A (zh) * 2017-07-31 2017-12-01 安徽博大纤维素科技有限公司 一种基于麦草进行木质纤维素制备的方法
CN107503207A (zh) * 2017-07-31 2017-12-22 安徽博大纤维素科技有限公司 一种基于花生外壳制备木质纤维素的方法
CN108951246A (zh) * 2018-08-20 2018-12-07 盐城名杰纸品包装有限公司 一种用于纸品生产制备的纸浆混合装置
CN109082919A (zh) * 2018-09-20 2018-12-25 淮安天然丝纺织科技有限公司 原浆纸粉碎方法

Also Published As

Publication number Publication date
AU4509789A (en) 1990-05-28

Similar Documents

Publication Publication Date Title
JP2501513B2 (ja) 竹繊維の製造方法
EP0960234A1 (fr) Procede et dispositif servant a defibrer un materiau contenant des fibres
US5334285A (en) Process for the treatment of wastepaper using drum soaker
DK2788544T3 (en) Procedure for processing old paper.
WO1990005208A1 (fr) Procede permettant de reduire la consommation d'energie lors de la production mecanique de pate a papier
US3994770A (en) Treatment of waste paper, especially to effect the recovery of clean fibers therefrom
GB2061133A (en) Treatment of waste paper
EP0326507B1 (fr) Procédé de recyclage de fibres secondaires
US1369180A (en) Treatment of sugar-cane and similar materials
CN100402740C (zh) 一种利用锤式破碎机对禾草类制浆原料进行备料的方法
CA2326160A1 (fr) Dispositif et procede pour effectuer une desagregation prealable de plantes fibreuses et raccourcir ces dernieres, et pour separer des fibres et des fragments de bois
US2811448A (en) Wine making process
HU179800B (en) Process for the mechanical digestion of green plant raw materials
CN112832050A (zh) 一种环保造纸用混合制浆工艺
US4891099A (en) Apparatus for secondary fibre processing
JPS5934834B2 (ja) 故紙を含む原料から紙繊維を回収する方法および装置
JP7470066B2 (ja) 古紙原料を解繊するための乾式解繊機および古紙パルプの製造方法
US3688345A (en) Method for processing fibrous stalks
CN220634697U (zh) 一种粉碎机进料结构
JP2938991B2 (ja) 文書処理装置
CN113186745B (zh) 一种干法处理废纸制浆方法
CN220386768U (zh) 一种岩棉生产回收设备
US1803443A (en) Process of preparing fiber from wood and wood waste
JP2000336588A (ja) プラスチック被覆紙原料から良質のセルロース繊維を取り出す方法
GB2092473A (en) Apparatus for the recovery of protein from green vegetable matter

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU BR DK FI JP NO SU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LU NL SE