旧新闻纸脱墨工艺的研究

论文编号:QH003 论文字数:11052,页数:28

摘 要：由于资源、环境和能源的问题,二次纤维在世界范围内已经成为制浆造纸工业一种重要的纤维来源。而作为废纸回用的关键技术之一的脱墨生产工艺也成为当今国内外研究的热点。[4]在一些印刷品废纸中，油墨约占2%（质量分数），在以这些废纸为原料造纸时，必须把这些油墨除去，所以旧新闻纸的脱墨技术已成为用好废纸的关键。目前各种废纸脱墨药品的开发研究发展日趋迅速，尤其是生物技术的革命促使酶在脱墨、漂白等制浆造纸领域中崭露头角。

本试验的主要内容是采用生物酶脱墨剂行了旧新闻纸的脱墨试验,探索不同脱墨工艺下的脱墨效果,比较脱墨浆手抄片的白度、残余油墨量（ERIC值）、抗张强度和撕裂强度等，从而得出最佳的生物酶脱墨工艺。实验显示，在0.1%的生物酶用量，50℃的反应温度，10%的碎浆浓度，浮选10min下，纸的白度最高。同时也与化学法时行了比较，效果比较接近。但生物酶法不用化学药品所以污染低。证明了其在脱墨浆生产中的适用性及对清洁生产的作用,为今后的推广打下了基础。

关键词：生 物 酶 ；旧 新 闻 纸 ；化 学 脱 墨 剂 ；残余油墨量

The research for old newsprint deinking technology

Abstract: Due to the issues of resource, environment and energy, the second fiber has become an important source of fiber in the pulp and paper industry. And the deinking process ,as one of the key technologies of waste paper recycling, has also become a hotspot for research. A number of printed paper has about 2% ink(mass fraction),when these waste paper are used as raw material, it is important to remove the ink, so the old newsprint deinking technology has become the key to make good use of waste paper. The research and development of various deinking agent are developing with an ever-increasing pace, especially the biotechnology revolution, it promotes the status of enzymes in deinking, bleaching and other areas of pulp and paper.

The main contents of this study is the deinking of old newspaper with the biological enzyme deinking agent, and explore the deinking effect in different deinking technology, in order to get the best bio-enzyme deinking technology by comparing the whiteness, the amount of residual ink ERIC, tensile strength and tear strength of paper. Experiments showed, when it comes to enzyme dosage, reaction temperature, the concentration, flotation time, it is the best time for them to become 0.1%, 50℃, 10% and 10min for each, we can get the highest whiteness of paper. When compared to the chemical method, the results were close. However, the bio-enzymatic method without chemicals produces low pollution. It has been proved that the bio-enzyme deinking can be used in the production of deinked pulp, and the role of cleaner production is clear, it lays the foundation for the promotion in the future.

Keywords：Biological enyme; Old newspaper; Chemical deinking agent; The amount of residual ink

目 录

中文摘要I

英文摘要II

目录III

1 绪论1

1.1 废纸利用现状1

1.2 废纸脱墨的发展状况2

1.3 废纸脱墨的方法及原理2

1.3.1 生物酶及生物酶脱墨2

1.3.2 生物酶脱墨机理及流程3

1.3.3 脱墨剂的组成及其作用4

1.3.3.1 生物酶脱墨4

1.3.3.2 化学法脱墨5

1.3.4 影响脱墨效果的因素5

1.3.4.1 生物酶脱墨5

1.3.4.2 化学法脱墨6

1.4 实验的研究方法、目的及意义6

2 实验材料与方法8

2.1 实验材料8

2.2 实验药品8

2.3 实验仪器、设备8

2.4 实验方案9

2.4.1 实验方案设计9

2.4.2 操作步骤10

2.5 主要性能指标的测定10

2.5.1 纸张残余油墨ERIC值和白度的测定10

2.5.2 纸张抗张指数的测量10

2.5.3 纸张撕裂指数的测量11

3 实验结果与讨论12

3.1 生物酶脱墨12

3.2 化学法脱墨18

3.3 生物酶法脱墨与化学法脱墨的对比实验19

4 实验结论21

5 实验存在问题及建议22

致 谢23

参考文献24