Kugwiritsa Ntchito Sodium Sulfite Anhydrous mu Makampani Opanga Mapepala

Makampani opanga mapepala ndi omwe amagwiritsa ntchito kwambiri zinthu za Sodium Sulfite. Sodium Sulfite ndi imodzi mwa njira zofunika kwambiri zopangira mapepala, makamaka yoyenera kugwiritsa ntchito zinthu zopanda matabwa. Ubwino wa njira iyi yopangira mapepala ndi mtundu wopepuka, kugwiritsa ntchito mankhwala ochepa oyeretsera ndi mankhwala ena, ndipo madzi otayira amatha kubwezeretsedwanso kuti apange zinthu zosiyanasiyana. Sodium sulfite anhydrous yomwe imagwiritsidwa ntchito pophika udzu wa tirigu wa alkali, kuchuluka kwa pulping kumawonjezeka, thovu lochepa, kusefa bwino, kutsuka mosavuta, kusunga madzi, kuchepetsa kugwiritsa ntchito mphamvu. Mlingo wogunda slurry umachepa, mphamvu ya ulusi ndi yabwino, yosavuta kupanga mapepala. Mtundu wa phala ndi wopepuka, wosavuta kuyeretsa komanso umachepetsa kuchuluka kwa chlorine. Pa kutentha kwa 160℃, 20% (misa) Sodium Sulfite inawonetsa zotsatira zabwino kwambiri pakusiyanitsa masagasi ndi ulusi, ndipo kuchuluka kwa delignification kunafika pa 48% patatha mphindi 30.

Ndi chitukuko chopitilira cha mafakitale opanga mapepala, kubwezeretsanso ulusi wachiwiri kumayamikiridwa kwambiri ndi makampani opanga mapepala, zomwe sizimangopulumutsa ndalama zopangira mapepala, komanso zimasunga nkhalango, kuchepetsa kugwiritsa ntchito mphamvu, komanso zimathandiza kuteteza chilengedwe. SSA ndi mankhwala abwino ochotsera ulusi, omwe amagwira ntchito pochotsa ulusi kuti ateteze zamkati kuti zisawonongeke, ndipo kuchotsa ulusi wa sodium sulphite pansi pa mikhalidwe yofooka ya alkaline kumakhala kothandiza kwambiri pochotsa inki. Ngati palibe mankhwala ophera tizilombo toyambitsa matenda, sungunukani pa 10% ya slurry concentration, kuwonjezera 2% ya sodium sulfite kumakhala ndi zotsatira zomveka. Sodium sulfite yosalowerera imagwiritsidwa ntchito kuchotsa ulusi wa nyuzipepala yakale, ndipo kuchuluka kwa sodium sulfite ndi 3% ~ 4%, komwe kumatha kukhala ndi zotsatira zabwino zochotsera ulusi, kuchepetsa kuipitsidwa kwa madzi otayidwa, komanso kothandiza pakukonza madzi otayidwa pambuyo pake.