Yin takarda bamboo a kasar Sin yana da dogon tarihi. Bamboo fiber ilimin halittar jiki da kuma sinadaran abun da ke ciki na da musamman halaye. Matsakaicin tsayin fiber na tsayi yana da tsayi, kuma microstructure na bangon fiber cell yana da na musamman, bugun ƙarfin aikin haɓakar ɓangaren litattafan almara yana da kyau, yana ba da ɓangaren litattafan almara mai kyau kayan gani na gani: babban opacity da ƙarancin watsawa mai haske. Bamboo albarkatun lignin abun ciki (kimanin 23% zuwa 32%) ya fi girma, yana ƙayyade girkin sa tare da babban alkali da sulfide (sulfide gabaɗaya 20% zuwa 25%), kusa da itacen coniferous; albarkatun kasa, hemicellulose da silicon abun ciki ya fi girma, amma kuma zuwa ga ɓangaren litattafan almara, ƙafewar barasa da tsarin kayan aiki na yau da kullun ya kawo wasu matsaloli. Duk da haka, ɗanyen bamboo ba shi ne ɗanyen abu mai kyau don yin takarda ba.
Matsakaicin bamboo na gaba da babban tsarin sinadarai na ɓangaren litattafan almara, za su yi amfani da tsarin bleaching TCF ko ECF. Gabaɗaya magana, haɗe tare da zurfin ƙaddamarwa da ƙarancin iskar oxygen na pulping, yin amfani da fasahar bleaching TCF ko ECF, gwargwadon adadin sassan bleaching daban-daban, ɓangaren bamboo na iya bleached zuwa 88% ~ 90% ISO fari.
Kwatancen bamboo ECF da TCF bleaching
Saboda babban abun ciki na lignin na bamboo, yana buƙatar haɗa shi tare da fasaha mai zurfi da haɓakar oxygen don sarrafa ƙimar Kappa na slurry shiga ECF da TCF (shawarar <10), ta amfani da Eop haɓaka matakan ECF guda biyu na jerin bleaching, acid acid. pretreatment ko Eop mataki biyu TCF jerin bleaching, duk wanda zai iya bleach sulphated bamboo ɓangaren litattafan almara zuwa babban matakin fari na 88% ISO.
Ayyukan bleaching na kayan albarkatun bamboo daban-daban sun bambanta sosai, Kappa zuwa 11 ~ 16 ko makamancin haka, ko da tare da ECF mai bleaching mataki biyu da TCF, ɓangaren litattafan almara na iya cimma 79% zuwa 85% matakin fari.
Idan aka kwatanta da ɓangaren litattafan bamboo na TCF, ECF bleached bamboo pulp yana da ƙarancin asarar bleaching da mafi girman danko, wanda gabaɗaya zai iya kaiwa fiye da 800ml/g. Amma ko da ingantaccen TCF na zamani bleached bamboo ɓangaren litattafan almara, danko iya kawai isa 700ml/g. Ingancin ɓangaren litattafan almara na ECF da TCF tabbatacce ne, amma cikakken la'akari da ingancin ɓangaren litattafan almara, saka hannun jari da farashin aiki, bleaching na bamboo ta amfani da bleaching ECF ko TCF, ba a gama ba tukuna. Masu yanke shawara na kasuwanci daban-daban suna amfani da matakai daban-daban. Amma daga yanayin ci gaba na gaba, bamboo pulp ECF da TCF bleaching za su kasance tare na dogon lokaci.
Magoya bayan fasahar bleaching ECF sun yi imanin cewa ɓangaren litattafan almara na ECF yana da mafi kyawun ɓangaren litattafan almara, tare da amfani da ƙananan sinadarai, ingantaccen aikin bleaching, yayin da tsarin kayan aiki ya balaga kuma yana da tsayin daka. Koyaya, masu ba da shawarar fasahar bleaching TCF suna jayayya cewa fasahar bleaching TCF tana da fa'idodin ƙarancin zubar da ruwa daga shukar bleaching, ƙarancin buƙatun hana lalata kayan aiki, da ƙarancin saka hannun jari. Sulphate bamboo ɓangaren litattafan almara TCF chlorine-free bleaching layin rungumi dabi'ar Semi-rufe bleaching tsarin, bleaching shuka sharar gida watsi da za a iya sarrafa a 5 zuwa 10m3/t ɓangaren litattafan almara. Ana aika ruwan sha daga sashin (PO) zuwa sashin lalata oxygen don amfani, kuma ana ba da ruwan sha daga sashin O zuwa sashin wanki don amfani, sannan a ƙarshe ya shiga cikin dawo da alkali. Saboda bleaching ba tare da chlorine ba, sinadarai ba su da lalacewa, kayan aikin bleaching baya buƙatar yin amfani da titanium da bakin karfe na musamman, ana iya amfani da bakin karfe na yau da kullum, don haka farashin zuba jari ya ragu. Idan aka kwatanta da layin samar da ɓangaren litattafan almara na TCF, ECF ɓangaren samar da layin saka hannun jari ya zama 20% zuwa 25% mafi girma, tare da layin samar da ɓangaren litattafan almara kuma ya fi 10% zuwa 15% mafi girma, saka hannun jari a cikin tsarin dawo da sinadarai shima ya fi girma, kuma aikin ya fi rikitarwa.
A takaice, bamboo pulp TCF da ECF bleaching samar da babban farin 88% zuwa 90% cikakken bleached ɓangaren litattafan almara yana yiwuwa. Ya kamata a yi amfani da ƙwanƙwasa a cikin fasaha mai zurfi mai zurfi, iskar oxygen kafin yin bleaching, sarrafa ɓangaren litattafan almara a cikin tsarin bleaching Kappa darajar, bleaching ta amfani da tsarin bleaching tare da jerin bleaching uku ko hudu. Shawarwari na ECF jerin bleaching don ɓangaren litattafan gora shine OD (EOP) D (PO), OD (EOP) DP; L-ECF jerin bleaching shine OD (EOP)Q (PO); Jerin Bleaching TCF shine Eop(ZQ)(PO)(PO), O(ZQ)(PO)(ZQ)(PO). Kamar yadda sinadaran sinadarai (musamman abun ciki na lignin) da ilimin halittar fiber suka bambanta da yawa a tsakanin nau'ikan bamboo daban-daban, ya kamata a gudanar da bincike mai tsauri kan yadda ake yin pulping da yin takarda na nau'ikan bamboo daban-daban kafin gina shuka don samar da jagora don haɓakar dacewa. aiwatar da hanyoyi da yanayi.
Lokacin aikawa: Satumba-14-2024
