速生材APMP制浆过程中草酸盐结垢的形成演化机制及其控制研究

Alkaline peroxide mechanical pulp (APMP) is the main chemimechanical pulp in China, which is one of the most promising pulps. During the pulping process, oxalate ions, coming from the degradation of reserved lignin and hemicellulose generates, easily combines with alkaline earth metal ions, which resulted in the formation of refractory oxalate scale. Oxalate scale is very hard, once formed extremely difficult to remove, which bring the serious damage to the production process. Consequently, the question of oxalate scale is becoming urgent in pulp and paper industry as it has a terrible influence on the energy saving and clean production directly. In the project, the mechanism of oxalate scale formation as well as its evolution, and the control of oxalate scale during APMP pulping of fast-growing wood will be studied. By means of the new techniques in dynamic monitoring and analyzing oxalate scale’s chemical behavior, the formation process and effect factors of oxalate scale will be systematically researched. In addition, the oxalate scale formation mechanism and its dynamic evolution rules will be revealed. Then the mathematical prediction model will be developed. It’s anticipated that the formation of oxalate scale during pulping of APMP could be reflected from the results above. Moreover, new scientific ideas about using nanometer materials in controlling oxalate scale will be developed. The enzymatic method in combination with sonochemical techniques will be also utilized for controlling oxalate scale formation during pulping process of APMP. Both of the mechanism during controlling oxalate scale will be investigated. This research will provide theoretical basis and technical support for the effective control of oxalate scale during production of chemimechanical pulp. All the research results will be of practical significance for the development of efficient clean pulping technology in pulp and paper industry in China.

碱性过氧化氢机械浆（APMP）是我国最主要的化学机械浆，也是目前最具发展前景的浆种之一。在APMP制浆过程中，由保留的木素和半纤维素降解生成的草酸根能与碱土金属离子结合形成难溶的草酸盐结垢，给生产过程带来了严重危害。由于直接关系到清洁生产和节能减排，草酸盐结垢已成为速生材APMP制浆过程中亟待解决的难题之一。为此，本课题提出对速生材APMP制浆过程中草酸盐结垢的形成演化机制及其控制的研究。利用新建立的动态监测分析技术，系统研究速生材APMP制浆过程中草酸盐结垢的形成规律和影响因素，揭示草酸盐结垢的形成演化机制，构建草酸结垢形成的数学预测模型；提出利用纳米材料控制草酸盐结垢的新思路，开辟生物酶结合超声化学法控制草酸盐结垢的新途径，并明确其各自控制机理，为控制化学机械浆生产过程中草酸盐结垢提供理论依据和技术支持。本研究成果对推进我国制浆造纸工业中高效清洁制浆技术的普及具有非常重要的现实意义。

在碱性过氧化氢机械浆（APMP）制浆过程中，由木素和半纤维素降解生成的草酸根能与碱土金属离子结合形成难溶的草酸盐结垢，给生产过程带来了严重危害。草酸盐结垢已成为速生材APMP制浆过程中亟待解决的难题之一。在大力发展化学机械浆的现代制浆造纸工业中，对速生材APMP制浆过程中草酸盐结垢形成演化机制的全面分析及其控制机理的系统研究成为解决草酸盐结垢问题的关键所在。因此，本项目利用新建立的分析测试方法，系统研究了速生材APMP制浆过程中草酸盐结垢的形成规律和影响因素，构建了草酸盐结垢形成的数学预测模型，揭示了草酸盐结垢的形成演化机制；提出了利用纳米材料的对环境友好、带有正电荷、吸附容量大和阴离子交换能力强等特点，吸附制浆过程中生成的草酸根离子，控制草酸盐结垢的新思路，开辟了草酸盐结垢控制的新途径，并明确了其相关的控制机理，为控制化学机械浆生产过程中草酸盐结垢提供了理论依据和技术支持。在本项目研究过程中，相关研究成果已发表学术论文13篇（其中，SCI收录论文11篇），获授权发明专利2件，申请发明专利4件。