Kugadzirwa kwebepa remubamboo muChina kwagara kuripo. Magadzirirwo efaibha yemubamboo uye kuumbwa kwemakemikari zvine hunhu hwakakosha. Avhareji yehurefu hwefaibha yakareba, uye chimiro chemadziro efaibha chakakosha, zvichirova simba rekukura kwepullpup zvakanaka, zvichiita kuti pulp yakacheneswa ive nehunyanzvi hwakanaka hwekuona: kupenya kwakanyanya uye kupenya kwechiedza. Hunhu hwe lignin yemubamboo (inenge 23% kusvika 32%) hwakakwira, zvichiratidza kuti pulp yacho inobikwa nealkali nesulfide yakakwira (sulfide inowanzova 20% kusvika 25%), iri pedyo nematanda e coniferous; zvinhu zvisina kugadzirwa, hemicellulose uye silicon zvakakwirira, asiwo kushambidzwa kwepullpup, evaporation yedoro dema uye concentration michina system kushanda kwakajairika kwakaunza mamwe matambudziko. Kunyange zvakadaro, zvinhu zvisina kugadzirwa zvemubamboo hazvisi zvinhu zvakanaka zvekugadzira bepa.
Masisitimu ekupukuta emhando yepamusoro emubamboo nemakemikari makuru emupumburu wepurasitiki yemuchina wekugadzira bleach, achashandisa nzira yekupukuta yeTCF kana ECF. Kazhinji, pamwe chete nekudzika kwekuchenesa uye kuchenesa kweokisijeni kwepulping, kushandiswa kwetekinoroji yekupukuta yeTCF kana ECF, zvichienderana nehuwandu hwezvikamu zvakasiyana zvekupukuta, pulp yebamboo inogona kucheneswa kusvika 88% ~ 90% ISO chena.
Kuenzanisa kweECF yebamboo neTCF yekucheneswa kwebvudzi
Nekuda kwehuwandu hwakawanda hwe lignin mubamboo, inofanirwa kubatanidzwa ne deep delignification uye oxygen delignification technologies kudzora Kappa value ye slurry inopinda muECF neTCF (inokurudzirwa <10), uchishandisa Eop enhanced two-stage ECF bleaching sequence, acid pretreatment kana Eop two-stage TCF bleaching sequence, zvese izvi zvinogona bleach sulphated bamboo pulp kusvika padanho rekuchena kwe88% ISO.
Kushanda kwebvudzi remhando dzakasiyana dzebamboo kunosiyana zvikuru, kubva pa11 kusvika 16 kana zvakadaro, kunyangwe paine kuchena kwemazinga maviri ECF neTCF, pulp inogona chete kusvika pa79% kusvika 85% yekuchena.
Kana tichienzanisa neTCF bamboo pulp, ECF bleached bamboo pulp ine kurasikirwa kushoma kwekuchena uye viscosity yakakwira, iyo inowanzo svika kupfuura 800ml/g. Asi kunyangwe iyo yakagadziridzwa yeTCF bleached bamboo pulp, viscosity inogona kusvika 700ml/g chete. Hunhu hweECF neTCF bleached pulp ichokwadi chisingarambiki, asi kufunga kwakazara nezvehunhu hwepulp, mari yekudyara uye yekushandisa, bleaching yebamboo pulp uchishandisa ECF bleaching kana TCF bleaching, haisati yapedzwa. Vagadziri vemabhizinesi akasiyana vanoshandisa maitiro akasiyana. Asi kubva mukufambira mberi mune ramangwana, bamboo pulp ECF neTCF bleaching zvichavepo kwenguva yakareba.
Vatsigiri vetekinoroji yeECF bleaching vanotenda kuti ECF bleached pulp ine mhando yepulp iri nani, nekushandiswa kwemakemikari mashoma, kushanda zvakanaka kwebleaching, nepo sisitimu yemidziyo yakakura uye inoshanda zvakatsiga. Zvisinei, vatsigiri vetekinoroji yeTCF bleaching vanoti tekinoroji yeTCF bleaching ine zvakanakira zvekubuda kwemvura yakasviba shoma kubva mufekitori yebleaching, zvinodiwa zvishoma zvekudzivirira ngura pamidziyo, uye mari shoma yekudyara. Sulphate bamboo pulp TCF chlorine-free bleaching line inoshandisa semi-closed bleaching system, kuburitswa kwemvura yakasviba mufekitori yebleaching kunogona kudzorwa pa5 kusvika 10m3/t pulp. Mvura yakasviba kubva kuchikamu che (PO) inotumirwa kuchikamu che oxygen delignification kuti ishandiswe, uye mvura yakasviba kubva kuchikamu cheO inopihwa kuchikamu chekusuka nesipo kuti ishandiswe, uye pakupedzisira inopinda mukudzoreredzwa kwealkali. Mvura yakasviba inobva kuchikamu cheQ inopinda mufekitori yekunze yekuchenesa mvura yakasviba. Nekuda kwebleaching isina chlorine, makemikari haaparadzi, michina yebleaching haidi kushandisa titanium nesimbi isina ngura yakakosha, simbi isina ngura yakajairika inogona kushandiswa, saka mutengo wekudyara wakaderera. Zvichienzaniswa neTCF pulp production line, mari yekudyara muECF pulp production line yakakwira ne20% kusvika 25%, nekudyara mu pulp production line yakakwirawo ne10% kusvika 15%, mari yekudyara mu chemical recovery system yakakurawo, uye mashandiro acho akaomarara.
Muchidimbu, kugadzira bleach yebamboo pulp TCF neECF yekuchena kwakanyanya kubva pa88% kusvika 90% yebamboo pulp yakacheneswa zvizere kunogoneka. Kupukuta kunofanirwa kushandiswa muhunyanzvi hwakadzama hwekuparadzanisa, oxygen deignization isati yacheneswa, kudzora pulp musystem yekupukuta Kappa kukosha, kupukuta uchishandisa nzira yekupukuta ine nzira nhatu kana ina dzekupukuta. Kurongedza kweECF bleach yebamboo pulp kunokurudzirwa ndekwekuti OD(EOP)D(PO), OD(EOP)DP; L-ECF bleaching sequence iri OD(EOP)Q(PO); TCF bleaching sequence iri Eop(ZQ)(PO)(PO), O(ZQ)(PO)(ZQ)(PO). Sezvo kuumbwa kwemakemikari (kunyanya lignin content) uye fibre morphology zvichisiyana zvikuru pakati pemhando dzakasiyana dzebamboo, chidzidzo chakarongeka chinofanira kuitwa pamusoro pekushanda kwepulping nepapermaking yemhando dzakasiyana dzebamboo isati yagadzirwa chirimwa kuti chipe gwara rekugadzira nzira nemamiriro ezvinhu anonzwisisika.
Nguva yekutumira: Gunyana-14-2024
