Yin takardar bamboo a China yana da dogon tarihi. Tsarin zare na bamboo da kuma sinadaran da ke cikinsa suna da halaye na musamman. Matsakaicin tsawon zare yana da tsayi, kuma ƙaramin tsarin bangon zare yana da na musamman, yana ƙaruwa da ƙarfin aikin haɓakar ɓaure yana da kyau, yana ba ɓauren da aka yi wa bleach kyawawan halaye na gani: babban haske da kuma yawan watsa haske. Yawan lignin na bamboo (kimanin 23% zuwa 32%) ya fi girma, yana ƙayyade dafa shi da babban alkali da sulfide (sulfide gabaɗaya 20% zuwa 25%), kusa da itacen coniferous; kayan aiki, hemicellulose da silicon sun fi girma, amma kuma ga wanke ɓaure, fitar da giya baƙi da tsarin kayan aiki na tattarawa aiki na yau da kullun ya kawo wasu matsaloli. Duk da haka, kayan aikin bamboo ba kayan aiki ne mai kyau don yin takarda ba.
Tsarin bleaching na bamboo na matsakaici da manyan sikelin sinadarai, zai yi amfani da tsarin bleaching na TCF ko ECF. Gabaɗaya, tare da zurfin bleaching da bleaching na iskar oxygen na pulping, amfani da fasahar bleaching ta TCF ko ECF, bisa ga adadin sassan bleaching daban-daban, ana iya bleaching na bamboo zuwa 88% ~ 90% na ISO fari.
Kwatanta ECF na bamboo da TCF bleaching
Saboda yawan sinadarin lignin da ke cikin bamboo, yana buƙatar a haɗa shi da fasahar zurfafawa da kuma rage iskar oxygen don sarrafa ƙimar Kappa na slurry da ke shiga ECF da TCF (an ba da shawarar <10), ta amfani da tsarin EOP mai inganci na ECF mai matakai biyu, maganin acid kafin a yi amfani da shi ko kuma tsarin Eop mai matakai biyu na bleaching, wanda duk zai iya bleaching da sulphate pulp na bamboo zuwa matakin farin ciki mai girma na 88% ISO.
Aikin bleaching na kayan da aka yi da bamboo daban-daban ya bambanta sosai, Kappa zuwa 11 ~ 16 ko makamancin haka, koda tare da ECF da TCF masu matakai biyu, ɓawon zai iya kaiwa matakin fari na kashi 79% zuwa 85%.
Idan aka kwatanta da ɓangaren litattafan bamboo na TCF, ɓangaren litattafan bamboo na ECF yana da ƙarancin asarar bleaching da kuma ɗanko mai yawa, wanda gabaɗaya zai iya kaiwa fiye da 800ml/g. Amma ko da ingantaccen ɓangaren litattafan bamboo na TCF mai bleaching na zamani, ɗanko zai iya kaiwa 700ml/g kawai. Ingancin ɓangaren litattafan bamboo na ECF da TCF gaskiya ce da ba za a iya musantawa ba, amma cikakken la'akari da ingancin ɓangaren litattafan, saka hannun jari da kuɗin aiki, bleaching ɗin ɓangaren litattafan bamboo ta amfani da bleaching na ECF ko bleaching na TCF, har yanzu ba a kammala ba. Masu yanke shawara daban-daban na kasuwanci suna amfani da hanyoyi daban-daban. Amma daga yanayin ci gaba na gaba, ɓangaren litattafan bamboo na ECF da bleaching na TCF za su kasance tare na dogon lokaci.
Masu goyon bayan fasahar bleaching ta ECF sun yi imanin cewa bleaching ɗin ECF yana da ingancin bleaching mafi kyau, tare da amfani da ƙananan sinadarai, ingantaccen bleaching mai yawa, yayin da tsarin kayan aiki yake da girma kuma yana da ƙarfi a aiki. Duk da haka, masu goyon bayan fasahar bleaching ta TCF sun yi jayayya cewa fasahar bleaching ta TCF tana da fa'idodin ƙarancin fitar da ruwan shara daga masana'antar bleaching, ƙarancin buƙatun hana lalata ga kayan aiki, da ƙarancin jari. Layin samar da bleaching na bamboo na TCF mara chlorine yana amfani da tsarin bleaching mai rufewa, ana iya sarrafa fitar da ruwan shara na masana'antar bleaching a 5 zuwa 10m3/t bleaching. Ana aika ruwan shara daga sashin (PO) zuwa sashin cleaning oxygen don amfani, kuma ana ba da ruwan shara daga sashin O zuwa sashin wanke sieve don amfani, kuma a ƙarshe yana shiga cikin murmurewa na alkali. Ruwan shara mai acidic daga sashin Q yana shiga cikin tsarin kula da ruwan shara na waje. Saboda bleaching ɗin ba tare da chlorine ba, sinadarai ba sa lalata, kayan aikin bleaching ba sa buƙatar amfani da titanium da ƙarfe na musamman na bakin ƙarfe, ana iya amfani da ƙarfe na bakin ƙarfe na yau da kullun, don haka farashin saka hannun jari ya yi ƙasa. Idan aka kwatanta da layin samar da ɓangaren litattafan almara na TCF, farashin saka hannun jari na layin samar da ɓangaren litattafan almara na ECF zai kai kashi 20% zuwa 25%, tare da saka hannun jari na layin samar da ɓangaren litattafan almara shi ma ya fi kashi 10% zuwa 15%, saka hannun jari a tsarin dawo da sinadarai shi ma ya fi girma, kuma aikin ya fi rikitarwa.
A takaice, samar da sinadarin bleach na ɓangaren litattafan bamboo TCF da ECF na farin fulawa mai cikakken haske daga kashi 88% zuwa 90% abu ne mai yiwuwa. Ya kamata a yi amfani da fasahar bleach mai zurfi, bleach na oxygen kafin bleach, sarrafa ɓangaren litattafan cikin tsarin bleach ƙimar Kappa, bleach ta amfani da tsarin bleach tare da jerin bleach guda uku ko huɗu. Jerin bleach na ECF da aka ba da shawarar don ɓangaren litattafan bamboo shine OD(EOP)D(PO), OD(EOP)DP; Jerin bleach na L-ECF shine OD(EOP)Q(PO); Jerin bleach na TCF shine Eop(ZQ)(PO)(PO), O(ZQ)(PO)(ZQ)(PO). Ganin cewa sinadaran da ke cikinsa (musamman abubuwan da ke cikin lignin) da siffar zare sun bambanta sosai tsakanin nau'ikan fulawa daban-daban, ya kamata a gudanar da bincike mai tsari kan aikin bleach da paper na nau'ikan fulawa daban-daban kafin gina masana'antar don samar da jagora don haɓaka hanyoyin aiki da yanayi masu dacewa.
Lokacin Saƙo: Satumba-14-2024
