He moʻolelo lōʻihi ka hana ʻana i ka pepa ʻohe ma Kina. He mau hiʻohiʻona kūikawā ko ka morphology fiber a me ka haku melemele. He lōʻihi ka lōʻihi o ka fiber, a he mea kūikawā ka microstructure o ka paia o ka fiber cell, maikaʻi ke kuʻi ʻana i ka ikaika o ka hana hoʻomohala ʻana o ka pulp, e hāʻawi ana i ka pulp bleached maikaʻi nā waiwai optical: kiʻekiʻe opacity a me ka māmā hoʻopuehu coefficient. ʻOi aku ka kiʻekiʻe o ka lignin o ka ʻohe maka (ma kahi o 23% a 32%), e hoʻoholo ana i kāna kuke pulp me ka alkali a me ka sulfide kiʻekiʻe (sulfide maʻamau 20% a 25%), kokoke i ka lāʻau coniferous; ʻOi aku ka kiʻekiʻe o nā mea maka, ka hemicellulose a me ka ʻike silika, akā i ka holoi ʻana i ka pulp, ʻeleʻele ka waiʻona evaporation a me ka ʻōnaehana hoʻonaʻauao ʻōnaehana i lawe mai i kekahi mau pilikia. Akā naʻe, ʻaʻole maikaʻi nā mea maka ʻohe no ka hana pepa.
E hoʻohana maʻamau ka ʻōnaehana hoʻomaʻemaʻe ʻo TCF a i ʻole ECF ma waena o ka lāʻau ʻohe a me ka nui-scale pulp mill bleaching system. ʻO ka mea maʻamau, i hui pū ʻia me ka hohonu o ka delignification a me ka oxygen delignification o ka pulping, ka hoʻohana ʻana i ka ʻenehana bleaching TCF a i ʻole ECF, e like me ka helu o nā ʻāpana bleaching like ʻole, hiki ke bleached ka pulp bamboo i 88% ~ 90% ISO keʻokeʻo.
Hoʻohālikelike o ka ʻohe ECF a me ka hoʻomaʻemaʻe TCF
Ma muli o ke kiʻekiʻe o ka lignin maʻiʻo o ka ʻohe, pono e hui pū ʻia me ka delignification hohonu a me nā ʻenehana delignification o ka oxygen e hoʻomalu i ka waiwai Kappa o ka slurry e komo ana i ka ECF a me TCF (manaʻo ʻia <10), me ka hoʻohana ʻana iā Eop i hoʻonui ʻia ʻelua mau pae ECF bleaching sequence, acid. pretreatment a i ʻole Eop ʻelua-pae TCF bleaching sequence, nā mea a pau e hiki ke hoʻomaʻemaʻe i ka pulp sulphated bamboo i kahi pae keʻokeʻo kiʻekiʻe o 88% ISO.
ʻO ka hana bleaching o nā mea maka o ka ʻohe ʻano like ʻole, Kappa i 11 ~ 16 a i ʻole, ʻoiai me ʻelua-pae bleaching ECF a me TCF, hiki i ka pulp ke hoʻokō i 79% a 85% keʻokeʻo.
Ke hoʻohālikelike ʻia me TCF bamboo pulp, ECF bleached bamboo pulp he emi ka bleaching loss a me ka viscosity kiʻekiʻe, hiki ke piʻi ma mua o 800ml/g. Akā ʻo ka TCF bleached bamboo pulp i hoʻomaikaʻi ʻia, hiki i ka viscosity ke hiki wale i 700ml/g. ʻO ka maikaʻi o ka pulp bleached ECF a me TCF he mea hiki ʻole ke hoʻopaʻapaʻa ʻia, akā ʻaʻole i hoʻopau ʻia ka noʻonoʻo piha ʻana i ka maikaʻi o ka pulp, ka hoʻopukapuka kālā a me nā kumukūʻai hana, ka bleaching pulp bamboo me ka hoʻohana ʻana i ka bleaching ECF a i ʻole ka bleaching TCF. Hoʻohana nā mea hoʻoholo ʻoihana like ʻole i nā kaʻina hana like ʻole. Akā, mai ka wā e hiki mai ana ka ulu ʻana, ʻohe pulp ECF a me TCF bleaching e noho pū ana no ka manawa lōʻihi.
Manaʻo ka poʻe kākoʻo o ka ʻenehana bleaching ECF he ʻoi aku ka maikaʻi o ka pulp bleached ECF, me ka hoʻohana ʻana i nā mea liʻiliʻi liʻiliʻi, kiʻekiʻe ka bleaching pono, ʻoiai ʻo ka ʻōnaehana lako a me ka hana paʻa. Eia naʻe, hoʻopaʻapaʻa ka poʻe kākoʻo o ka ʻenehana bleaching TCF i ka ʻenehana bleaching TCF i nā mea maikaʻi o ka emi ʻana o ka wai ʻino mai ka mea kanu bleaching, nā koi anti-corrosion haʻahaʻa no nā mea hana, a me ka haʻahaʻa haʻahaʻa. ʻO Sulphate bamboo pulp TCF chlorine-free bleaching production line apono ʻana i ka ʻōnaehana bleaching semi-pani ʻia, hiki ke mālama ʻia ka hoʻokuʻu ʻana o ka wai ʻōpala i ka 5 a 10m3/t pulp. Hoʻouna ʻia ka wai ʻino mai ka ʻāpana (PO) i ka pauku deligification o ka oxygen no ka hoʻohana ʻana, a hāʻawi ʻia ka wai ʻino mai ka ʻāpana O e kānana ʻana i ka ʻāpana holoi no ka hoʻohana ʻana, a komo hope i loko o ka hoʻihoʻi alkali. Ma muli o ka bleaching me ka ʻole o ka chlorine, ʻaʻole corrosive nā kemika, ʻaʻole pono nā mea bleaching e hoʻohana i ka titanium a me ke kila kila kūikawā, hiki ke hoʻohana ʻia ke kila kila maʻamau, no laila he haʻahaʻa ke kumu kūʻai. Ke hoʻohālikelike ʻia me ka TCF pulp production line, ECF pulp production line koina hoʻolimalima i ka 20% a 25% kiʻekiʻe, me ka hoʻokomo ʻana o ka laina hana pulp he 10% a 15% kiʻekiʻe, ʻoi aku ka nui o ka hoʻopukapuka ʻana i ka ʻōnaehana hoʻōla kemika, a ʻoi aku ka paʻakikī o ka hana.
I ka pōkole, hiki i ka pulp bamboo pulp TCF a me ECF bleaching o ke keʻokeʻo kiʻekiʻe 88% a 90% piha bleached bamboo pulp. Pono e hoʻohana ʻia ka pulupulu i ka ʻenehana delignification hohonu, deligification oxygen ma mua o ka bleaching, ka hoʻomalu ʻana i ka pulp i loko o ka ʻōnaehana bleaching Kappa waiwai, bleaching me ka hoʻohana ʻana i ke kaʻina bleaching me ʻekolu a ʻehā mau kaʻina bleaching. Manaʻo ʻia ʻo ECF bleaching sequence no ka pulp ohe ʻo OD(EOP)D(PO), OD(EOP)DP; ʻO ke kaʻina bleaching L-ECF he OD(EOP)Q(PO); ʻO ke kaʻina bleaching TCF ʻo Eop(ZQ)(PO)(PO), O(ZQ)(PO)(ZQ)(PO). Ma muli o ka ʻokoʻa ʻana o ka haku mele (ʻoi aku ka lignin content) a me ka fiber morphology ma waena o nā ʻano like ʻole o ka ʻohe, pono e mālama ʻia kahi noiʻi ʻōnaehana ma ka hana pulping a me ka hana pepa o nā ʻano ʻohe like ʻole ma mua o ke kūkulu ʻia ʻana o ka mea kanu e hāʻawi i ke alakaʻi no ka hoʻomohala ʻana i nā kumu kūpono. kaʻina hana ala a me nā kūlana.
Ka manawa hoʻouna: Sep-14-2024
