舊新聞紙脫墨工藝的研究

輕化工程論文編號:QH003  論文字數:11052,頁數:28

目  錄
中文摘要 I
英文摘要 II
目錄 III
1  緒論 1
1.1  廢紙利用現狀 1
1.2  廢紙脫墨的發展狀況 2
1.3  廢紙脫墨的方法及原理 2
1.3.1  生物酶及生物酶脫墨 2
1.3.2  生物酶脫墨機理及流程 3
1.3.3  脫墨劑的組成及其作用 4
1.3.3.1  生物酶脫墨 4
1.3.3.2  化學法脫墨 5
1.3.4  影響脫墨效果的因素 5
1.3.4.1  生物酶脫墨 5
1.3.4.2  化學法脫墨 6
1.4  實驗的研究方法、目的及意義 6
2  實驗材料與方法 8
2.1  實驗材料 8
2.2  實驗藥品 8
2.3  實驗儀器、設備 8
2.4  實驗方案 9
2.4.1  實驗方案設計 9
2.4.2  操作步驟 10
2.5  主要性能指標的測定 10
2.5.1  紙張殘余油墨ERIC值和白度的測定 10
2.5.2  紙張抗張指數的測量 10
2.5.3  紙張撕裂指數的測量 11
3  實驗結果與討論 12
3.1  生物酶脫墨 12
3.2  化學法脫墨 18
3.3  生物酶法脫墨與化學法脫墨的對比實驗 19
4  實驗結論 21
5  實驗存在問題及建議 22
致  謝 23
參考文獻 24

 摘 要：由于資源、環境和能源的問題,二次纖維在世界范圍內已經成為制漿造紙工業一種重要的纖維來源。而作為廢紙回用的關鍵技術之一的脫墨生產工藝也成為當今國內外研究的熱點。[4]在一些印刷品廢紙中，油墨約占2%（質量分數），在以這些廢紙為原料造紙時，必須把這些油墨除去，所以舊新聞紙的脫墨技術已成為用好廢紙的關鍵。目前各種廢紙脫墨藥品的開發研究發展日趨迅速，尤其是生物技術的革命促使酶在脫墨、漂白等制漿造紙領域中嶄露頭角。
 本試驗的主要內容是采用生物酶脫墨劑行了舊新聞紙的脫墨試驗,探索不同脫墨工藝下的脫墨效果,比較脫墨漿手抄片的白度、殘余油墨量（ERIC值）、抗張強度和撕裂強度等，從而得出最佳的生物酶脫墨工藝。實驗顯示，在0.1%的生物酶用量，50℃的反應溫度，10%的碎漿濃度，浮選10min下，紙的白度最高。同時也與化學法時行了比較，效果比較接近。但生物酶法不用化學藥品所以污染低。證明了其在脫墨漿生產中的適用性及對清潔生產的作用,為今后的推廣打下了基礎。
 關鍵詞：生 物 酶 ；舊 新 聞 紙 ；化 學 脫 墨 劑 ；殘余油墨量

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