IṢẸ́ ỌNÀ
ẸWÀ ÀTI ÌLERA
IṢẸ́ ỌWỌ́
ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
SÁYẸ́ǸSÌ
ERÉ ÌDÁRAYÁ
ÌMỌ̀-Ẹ̀RỌ
ÀWỌN OHUN WÍWỌ̀
Kraft Pulp, Linerboard and Fluting Medium
Kraft ("strong") paper comes from wood chips cooked under pressure at 170–176 °C in white liquor, a solution of sodium hydroxide and sodium sulfide that dissolves the lignin. About half the wood comes out as brown pulp. Softwood pulp makes linerboard and brown kraft paper; hardwood pulp makes the fluting medium. A paper machine forms, presses, dries and reels it.
The picture: our diagram of chips, digester and paper machine.
Ilọsíwájú
Factory process
Ìlànà
1
1
Chip the logs
Chip the logs
Cut the softwood and the hardwood logs to length and chip each separately.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Àwọn igi rírọ̀1 ẹyọ
Igi líle (oaki, mápù, bíìṣì)1 ẹyọÀwọn irinṣẹ́ tí a nílò:
Chainsaw (ipò oníṣẹ́ igbó)
Ẹ̀rọ gígé igi sí wẹ́wẹ́2
2
Make the white liquor
Make the white liquor
Dissolve sodium sulfide into the sodium hydroxide solution: this is the white liquor.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Sodium hydroxide ní omi ìdá 1020 lítà
Sodium sulfide1 kgÀwọn irinṣẹ́ tí a nílò:
Ìbọ̀wọ́ Tí Ń Kojú Kẹ́míkà
Gílásì Ààbò Tí Ó Sé3
3
Cook
Cook
Cook each batch of chips in white liquor in the closed digester at 170–176 °C until the lignin has dissolved and the chips fall apart.
Àwọn irinṣẹ́ tí a nílò:
Ìkòkò ìsè igi bébàÌbọ̀wọ́ Tí Ń Kojú Kẹ́míkàGílásì Ààbò Tí Ó Sé4
4
Wash the brown stock
Wash the brown stock
Drain off the black liquor and wash the brown pulp with water.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Omi100 lítàÀwọn irinṣẹ́ tí a nílò:
Ìbọ̀wọ́ Tí Ń Kojú Kẹ́míkà5
5
Form, press, dry, reel
Form, press, dry, reel
Dilute the pulp and run it on the paper machine: drain it on the wire, press it between rolls, dry it round the steam cylinders and wind it on reels. Softwood pulp gives linerboard and brown kraft paper; hardwood pulp gives fluting medium.
Àwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ṣíṣe bébà6
6
Pulp yield
Pulp yield
Ń ṣí ìwé Jupyter…
Àwọn ohun-èlò
5- 1 ẹyọÀyè
- Àyè
- Àyè
- 1 kgÀyè
- 100 lítàÀyè
Àwọn irinṣẹ́ tó nílò
6Ìtọ́nisọ́nà yìí ń ṣe
Blueprint tó jọra
Àwọn blueprint wọ̀nyí pín ìmọ̀ — ọ̀nà, ohun-èlò tàbí ìlànà
CC0 Àgbègbè Gbogbogbò
Blueprint yìí ti jáde lábẹ́ CC0. O lè ṣe àdàkọ, yí padà, pín, àti lò láìsí ìyọ̀ǹda.
Ṣàtìlẹ́yìn Olùṣẹ́dá nípa rírà àwọn ọjà nipasẹ̀ Blueprint wọn Ẹ̀san Olùṣẹ́dá tí àwọn Olùtajà gbé kalẹ̀, tàbí ṣẹ̀dá àtúnṣe tuntun ti Blueprint yìí kí o sì fi sínú Blueprint rẹ gẹ́gẹ́ bí ìsopọ̀ láti pín owó-wíwọlé.