Ho etsa pampiri ea bamboo Chaena ho na le nalane e telele. Bamboo fiber morphology le sebopeho sa lik'hemik'hale li na le litšobotsi tse ikhethang. Karolelano ea bolelele ba fiber e telele, 'me microstructure ea lerako la fiber e khethehile, ho otla ka matla a ts'ebetso ea nts'etsopele ea makhasi ho molemo, ho fana ka makhasi a bleached thepa e ntle ea optical: opacity e phahameng le coefficient ea ho hasanya leseli. Bamboo raw material lignin content (hoo e ka bang 23% ho isa ho 32%) e phahame, ho etsa qeto ea ho pheha makhasi a eona ka alkaline e phahameng le sulfide (sulfide ka kakaretso 20% ho 25%), haufi le lehong la coniferous; lisebelisoa tse tala, hemicellulose le silicon li phahame, empa hape le ho hlatsuoa ha makhasi, mouoane o motšo oa joala le lisebelisoa tsa mahloriso ts'ebetso e tloaelehileng e tlisitse mathata. Leha ho le joalo, thepa e tala ea bamboo ha se thepa e tala e ntle bakeng sa ho etsa pampiri.
Sistimi e kholo ea nako e tlang ea bamboo e mahareng le e kholo ea khemikhale ea pulp mill bleaching, e tla sebelisa ts'ebetso ea TCF kapa ECF ea bleaching. Ka kakaretso, ho kopantsoe le botebo ba delignification le oksijene delignification ea pulping, tšebeliso ea TCF kapa ECF bleaching thekenoloji, ho ea ka palo ea likarolo tse fapaneng bleaching, bamboo pulp ka bleached ho 88% ~ 90% ISO bosoeu.
Papiso ea bamboo ECF le TCF bleaching
Ka lebaka la lignin tse ngata tsa bamboo, e hloka ho kopanngoa le mahlale a tebileng a ho hlakisa le ho hlakisa oksijene ho laola boleng ba Kappa ba slurry e kenang ECF le TCF (e khothalelitsoeng <10), ho sebelisoa Eop e matlafalitsoeng ea mekhahlelo e 'meli ea tatelano ea bosoeu ea ECF, acid. pretreatment kapa tatelano ea bosoeu ea Eop ea mekhahlelo e 'meli ea TCF, kaofela ha eona e ka soeufatsa makhasi a bamboo a sulphated ho ea boemong bo bosoeu bo phahameng ba 88% ea ISO.
Ts'ebetso ea ho soeufala ha thepa e fapaneng ea bamboo e fapana haholo, Kappa ho isa ho 11 ~ 16 kapa ho feta, leha e ka ba methati e 'meli ea ho soeufala ha ECF le TCF, pulp e ka fihlela boemo ba bosoeu ba 79% ho isa ho 85%.
Ha ho bapisoa le TCF bamboo pulp, ECF bleached bamboo pulp e na le tahlehelo e fokolang ea ho soeufala le viscosity e phahameng, eo ka kakaretso e ka fihlang ho feta 800ml/g. Empa le makhasi a bamboo a ntlafalitsoeng a TCF, viscosity e ka fihla ho 700ml/g. ECF le TCF bleached pulp quality ke 'nete e ke keng ea latoloa, empa ho nahanoa ka botlalo ka boleng ba makhasi, matsete le litšenyehelo tsa ts'ebetso, ho soeufatsa ha bamboo pulp ka ho sebelisa bleaching ea ECF kapa TCF bleaching, ha ho so fihleloe. Baetsi ba liqeto tse fapaneng tsa khoebo ba sebelisa mekhoa e fapaneng. Empa ho tsoa molemong oa nts'etsopele ea nako e tlang, bamboo pulp ECF le TCF bleaching li tla ba teng ka nako e telele.
Batšehetsi ba thekenoloji ea bleaching ea ECF ba lumela hore ECF bleached pulp e na le boleng bo ntlafetseng ba makhasi, ka tšebeliso ea lik'hemik'hale tse fokolang, ts'ebetso e phahameng ea bleaching, ha tsamaiso ea thepa e ntse e holile ebile e tsitsitse ts'ebetsong. Leha ho le joalo, babuelli ba theknoloji ea TCF e soeufatsang ba pheha khang ea hore theknoloji ea TCF ea ho soeufatsa e na le melemo ea ho ntša metsi a litšila a fokolang ho tsoa femeng e soeufalitsoeng, litlhoko tse tlase tse thibelang ho bola ha thepa, le matsete a tlase. Sulphate bamboo pulp TCF chlorine-free bleaching system e nka mokhoa oa ho soeufatsa o koetsoeng, 'me ho tsoa ha metsi a litšila ho ka laoloa ho 5 ho isa ho 10m3/t pulp. Metsi a litšila a tsoang karolong ea (PO) a romelloa karolong ea delignification ea oksijene bakeng sa tšebeliso, 'me metsi a litšila a tsoang karolong ea O a fanoa karolong ea ho hlatsoa sieve bakeng sa ho sebelisoa,' me qetellong a kena ka alkali recovery.Metsi a litšila a acid a tsoang karolong ea Q a kena tsamaisong ea ho hloekisa metsi a litšila ka ntle. Ka lebaka la bleaching ntle le chlorine, lik'hemik'hale ha li senyehe, lisebelisoa tsa bleaching ha li hloke ho sebelisa titanium le tšepe e khethehileng e sa hloekang, tšepe e tloaelehileng e sa hloekang e ka sebelisoa, kahoo litšenyehelo tsa lichelete li tlaase. Ha ho bapisoa le mohala oa tlhahiso ea makhasi a TCF, litšenyehelo tsa matsete a tlhahiso ea makhasi a ECF e tla ba 20% ho isa ho 25% holimo, le matsete a marang-rang a tlhahiso ea makhasi le ona a phahame ka 10% ho isa ho 15%, letsete la ts'ebetso ea ho hlaphoheloa ha lik'hemik'hale le lona le leholoanyane. opereishene e rarahane ho feta.
Ka bokhuts'oanyane, makhasi a bamboo TCF le ECF a soeufalitse tlhahiso ea bosoeu bo phahameng 88% ho isa ho 90% ea bamboo e soeufalitsoeng ka botlalo e ka khoneha. Pulping lokela ho sebelisoa ka botebo delignification thekenoloji, delignification oksijene pele bleaching, taolo ea pulp ka bleaching system Kappa boleng, bleaching ka ho sebelisa bleaching mokhoa ka tatelano tse tharo kapa tse 'nè bleaching. Tatelano e sisintsweng ya bleaching ya ECF bakeng sa pulp ya bamboo ke OD(EOP)D(PO), OD(EOP)DP; Tatelano ya bleaching ya L-ECF ke OD(EOP)Q(PO); TCF tatelano ya bleaching ke Eop(ZQ)(PO)(PO), O(ZQ)(PO)(ZQ)(PO). Kaha sebopeho sa lik'hemik'hale (haholo-holo lignin content) le fiber morphology li fapana haholo har'a mefuta e fapaneng ea bamboo, thuto e hlophisitsoeng e lokela ho etsoa mabapi le ts'ebetso ea ho hula le ho etsa pampiri ea mefuta e fapaneng ea bamboo pele ho kaho ea semela ho fana ka tataiso bakeng sa nts'etsopele ea temo e utloahalang. litsela le maemo a tshebetso.
Nako ea poso: Sep-14-2024
