ECF elemental chlorine-isina bleaching process ye bamboo tissue

Tine nhoroondo refu yekugadzira mapepa ebamboo muChina. Magadzirirwo efiber yebamboo uye kuumbwa kwemakemikari zvakasiyana. Avhareji yehurefu hwefiber yakareba, uye microstructure yemadziro efiber cell yakakosha. Simba rekukura kwesimba panguva ye pulping rakanaka, zvichipa bleached pulp yakanaka ye optical properties ye high opacity uye light scattering coefficient. Lignin ye lignin yezvinhu zvebamboo (inenge 23%-32%) yakakwira, izvo zvinosarudza huwandu hwakawanda hwealkali uye sulfidation degree panguva ye pulping nekubika (sulfidiation degree inowanzova 20%-25%), iyo iri pedyo ne coniferous wood. Hemicellulose yakawanda uye silicon yezvigadzirwa zvebamboo zvinounzawo mamwe matambudziko pakushanda kwakajairika kwe pulp washing uye black liquoise evaporation uye concentration equipment system. Pasinei neizvi, zvinhu zvebamboo zvichiri zvinhu zvakanaka zvekugadzira mapepa.

Iyo bleaching system yemahombe uye epakati-saizi makemikari pulping zvirimwa zve bamboo inozotora TCF kana ECF bleaching process. Kazhinji kutaura, yakasanganiswa neyakadzama delignification uye oxygen delignification yekupuruzira, TCF kana ECF bleaching tekinoroji inoshandiswa. Zvichienderana nehuwandu hwematanho eku bleaching, bamboo pulp inogona kucheneswa kusvika 88% -90% kupenya.

Matumba edu ebamboo bleached pulp ese akacheneswa neECF (elemental chlorine), iyo ine kurasikirwa kushoma kwekucheneswa pabamboo pulp uye viscosity yakakura yepulp, inowanzo svika kupfuura 800ml/g. Matumba ebamboo bleached eECF ane mhando yepulp iri nani, anoshandisa makemikari mashoma, uye ane kushanda kwakanaka kwekucheneswa. Panguva imwe chete, sisitimu yemidziyo yakakura uye mashandiro ayo akagadzikana.

Matanho ekuita eECF elemental chlorine-isina bleaching ye bamboo tissues ndeiyi: kutanga, oxygen (02) inounzwa muoxidation tower for oxidative delignification, uyezve D0 bleaching-washing-Eop extraction-washing-D1 bleaching-washing inoitwa munhevedzano mushure mekugeza. Iyo huru yemakemikari bleaching agents ndeye CI02 (chlorine dioxide), NaOH (sodium hydroxide), H202 (hydrogen peroxide), etc. Pakupedzisira, iyo bleached pulp inoumbwa nekudzvinyirira kupera mvura. Kuchena kweakacheneswa bamboo pulp tissue kunogona kusvika kudarika 80%.