Bamboo paper kugadzira muChina ine nhoroondo refu. Bamboo fiber morphology uye kuumbwa kwemakemikari kune akakosha maitiro. Ivhareji yehurefu hwefiber yakareba, uye microstructure yefiber cell wall inokosha, kurova musimba rekushanda kwekukura kwe pulp kwakanaka, kupa bleached pulp yakanaka optical properties: high opacity uye chiedza chinopararira coefficient. Bamboo raw material lignin content (inenge 23% kusvika 32%) yakakwirira, inosarudza kubika kwayo pulp nepamusoro alkali uye sulfide (sulfide kazhinji 20% kusvika 25%), pedyo ne coniferous wood; mbishi zvinhu, hemicellulose uye silicon zvirimo zvakakwirira, asi zvakare pakugezwa kwepurupa, dema doro evaporation uye yevasungwa sisitimu yakajairika kushanda kwaunza mamwe matambudziko. Zvakadaro, bamboo raw material haisi yakanaka mbishi yekugadzira mapepa.
Ramangwana bamboo yepakati uye yakakura-chiyero chemakemikari pulp mill bleaching system, inozoshandisa TCF kana ECF bleaching process. Kazhinji kutaura, kusanganiswa nekudzika kwe delignification uye oxygen delignification yekupuruzira, kushandiswa kweTCF kana ECF bleaching tekinoroji, zvichienderana nenhamba yezvikamu zvakasiyana zve bleaching, bamboo pulp inogona kucheneswa kusvika 88% ~ 90% ISO kuchena.
Kuenzanisa kwe bamboo ECF uye TCF bleaching
Nekuda kweiyo yakakwira lignin ye bamboo, inoda kusanganiswa neyakadzama delignification uye oxygen delignification tekinoroji kudzora kukosha kweKappa kweslurry inopinda muECF neTCF (inokurudzirwa <10), uchishandisa Eop yakagadziridzwa nhanho mbiri dzeECF bleaching sequence, acid. pretreatment kana Eop two-stage TCF bleaching sequence, zvese zvinogona kubleach sulphated bamboo pulp kusvika pakuchena kwepamusoro kwe88% ISO.
Kuita kwebleaching kwezvakasiyana mbichana zve bamboo kunosiyana zvakanyanya, Kappa kusvika 11 ~ 16 kana zvakadaro, kunyangwe nematanho maviri eku bleaching ECF neTCF, pulp inogona chete kuwana 79% kusvika 85% yekuchena mwero.
Kuenzaniswa neTCF bamboo pulp, ECF yaka bleached bamboo pulp ine kushomeka kwekurasikirwa nekupenya kwepamusoro, iyo inogona kusvika kupfuura 800ml/g. Asi kunyangwe iyo yakagadziridzwa yemazuva ano TCF yakagezwa bamboo pulp, viscosity inogona kungosvika 700ml/g. ECF neTCF bleached pulp quality ichokwadi chisingarambiki, asi kutarisisa kwakadzama kwemhando yepulp, mari yekudyara nekushandisa, bamboo pulp bleaching uchishandisa ECF bleaching kana TCF bleaching, haisati yapera. Vakasiyana bhizinesi vanoita sarudzo vanoshandisa maitiro akasiyana. Asi kubva mune ramangwana rekusimudzira maitiro, bamboo pulp ECF uye TCF bleaching ichavepo kwenguva yakareba.
Vatsigiri veECF bleaching tekinoroji vanotenda kuti ECF bleached pulp ine zvirinani pulp mhando, nekushandiswa kwemakemikari mashoma, yakakwirira bleaching kunyatsoshanda, ukuwo michina sisitimu yakakura uye yakagadzikana mashandiro ekushanda. Nekudaro, vamiriri veTCF bleaching tekinoroji vanopokana kuti TCF bleaching tekinoroji ine zvakanakira kubuda kwetsvina shoma kubva muchirimwa chekutsvaira, yakaderera anti-corrosion zvinodiwa pamidziyo, uye kushomeka kwekudyara. Sulphate bamboo pulp TCF chlorine-isina bleaching line yekugadzira inoshandisa semi-yakavharwa bleaching system, bleaching chirimwa chetsvina inobuda inogona kudzorwa pa5 kusvika 10m3/t pulp. Mvura yakasviba kubva (PO) chikamu inotumirwa kuchikamu chekugadzirisa okisijeni kuti ishandiswe, uye mvura yetsvina kubva kuO chikamu inopiwa kune sieve yekugeza chikamu chekushandisa, uye pakupedzisira inopinda mune alkali recovery.Acidic wastewater kubva kuQ chikamu inopinda mune yekunze tsvina yekuchenesa nzira. Nekuda kwekuchena pasina chlorine, makemikari haaparare, iyo bleaching midziyo haidi kushandisa titanium uye yakakosha simbi isina tsvina, yakajairwa Stainless simbi inogona kushandiswa, saka mari yekudyara yakaderera. Kuenzaniswa neTCF pulp yekugadzira mutsara, ECF pulp yekugadzira mutsara wekudyara mutengo wekudyara kuita 20% kusvika 25% yakakwira, ine pulp yekugadzira mutsara wekudyara zvakare 10% kusvika 15% yakakwira, iyo investimendi mumakemikari kudzoreredza system zvakare yakakura, uye kushanda kwakanyanya kuoma.
Muchidimbu, bamboo pulp TCF neECF kugadzirwa kwekucheneruka kwepamusoro 88% kusvika 90% yakanyatso bleached bamboo pulp inogoneka. Pulping inofanira kushandiswa zvakadzama delignification tekinoroji, oxygen delignification before bleaching, control of the pulp in the bleaching system Kappa value, bleaching using bleaching process with three or four bleaching sequences. Inokurudzirwa ECF bleaching sequence ye bamboo pulp ndeye OD(EOP)D(PO), OD(EOP)DP; L-ECF bleaching sequence ndeye OD(EOP)Q(PO); TCF bleaching sequence inoti Eop(ZQ)(PO)(PO), O(ZQ)(PO)(ZQ)(PO). Sezvo kemikari inoumbwa (kunyanya lignin yemukati) uye fiber morphology inosiyana zvakanyanya pakati pemhando dzakasiyana dzeshenjere, ongororo yakarongeka inofanirwa kuitwa pakupura uye kugadzira mapepa kwemhando dzakasiyana dze bamboo kusati kwavakwa chirimwa kuti ipe nhungamiro yekuvandudza zvine musoro. nzira uye mamiriro ezvinhu.
Nguva yekutumira: Sep-14-2024
