Study on Soda-oxygen Pulping of Bagasse with Alkali Pretreatment and Black Liquor Back-cycling
The save-energy and clean soda-oxygen pulping of bagasse were studied in this paper.Soda pretreatment with or without supersonic were tried and compared during the pretreatment stage of soda-oxygen pulping.Consequently,the process of soda-oxygen pulping with the back-cycling of black liquor was carried out at low cooking temperature in consideration of saving energy,environmentally friendly production,etc.The pulp with good properties was obtained under the pulping at 105℃ for 120 min with 15％ NaOH charge,0.5％MgSO4,AOA-1 as a pulping additive self-regulated,12％ pulp consistency,and 0.6 MPa initial oxygen pressure,when the soda pretreatment conditions were as follows: 90℃ for 10 min with 15％ NaOH charge and 10％ bagasse consistency.The resultant pulps had yield above 60％,Kappa number ranging from 15.37 to 17.16,viscosity above 758dm3/kg,brightness above 55.9％,and handsheets with burst index above 3.03 KPa·m2/g,tear index above 5.47 mN·m2/g,and tensile index above 34.4 N·m/g.The results showed that alkali pretreatment can reduce the maximum pulping temperature effectively,while the supersonic pretreatment seemed not to be helpful to the pulping.The pulping with black liquor back-cycling can enhance black liquor concentration above two times and keep the properties of pulps steady.
back-cycling bagasse black liquor alkali pretreatment soda-oxygen pulping
HAN SHAOZHONG CHEN KELI
The Research Center of Pulp & Paper Engineering,Kunming University of Science and Technology,Kunming,China
国际会议
第二届国际造纸与环境学术会议(The Second International Papermaking & Environment Conference)
天津
英文
387-390
2008-05-14（万方平台首次上网日期，不代表论文的发表时间）