Establishment of Recycling System of Incinerated Ashes produced from Paper Garbage and Paper

造纸垃圾和纸张焚烧灰烬回收利用系统的建立

基本信息

批准号：
12556025
负责人：
ISOGAI Akira
金额：
$ 8.26万
依托单位：
THE UNIVERSITY OF TOKYO
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12556025/
关键词：
Paper sludge Garbage Incinerated ash Recycle Paper fillers Paper Environment Papermaking

项目摘要

Incineration conditions as well as milling conditions of the incinerated ash prepared from paper sludge were investigated in detail in order to establish recycling system of inorganic compounds in paper sludge, because most of these inorganic compounds originate from paper fillers, which are added to paper stock to increase opacity and brightness of paper produced. The results show that paper sludge ash obtained by incineration at 800℃ for 1 h followed by ball-milling in water can be used as recycled paper fillers. Distribution of elements in the incinerated ash particles was analyzed by using a scanning electron microscope attached with an X-ray dispersive analyzer. Calcium carbonate, magnesium carbonate and kaolin clay present in the paper sludge are converted to gellenite by fusion during incineration at the temperature below 600℃. Elementary analysis of garbage-incinerated ash sampled in garbage-incineration centers in Tokyo metropolitan areas showed that calcium, silicate and aluminum are the predominant components, which suggested that these elements originated from paper fillers. These garbage-incinerated ash samples, however, contained water-soluble fraction in the range of 5-20%. Low-crystalline compounds having similar X-ray diffraction patterns were obtained from the garbage-incinerated ash samples by boiling-water extraction. It was impossible so far to improve brightness of paper sludge incinerated ash to more than 70% even by various trials.The paper sludge incinerated ash was added to paper stock up to 40% to evaluate properties of handsheets containing the ash as fillers. Reduction of tensile index could be restricted by using a dry-strength additive such as anionic PAM. Although brightness of the handsheets decreased with the ash addition, remarkable improvement of opacity was achieved by the ash addition.

详细研究了由纸质污泥制备的感染灰分的焚化条件以及铣削条件，以建立纸污泥中无机化合物的回收系统，因为这些无机化合物中的大多数来自纸质填充剂，这些化合物源自纸质填充剂，这些化合物添加到纸库存中，以增加产生的纸张和纸张的透视度和明亮性。结果表明，通过感染以800℃获得1小时，然后在水中进行球磨碎的纸灰灰用作回收纸填充剂。通过使用与X射线色散分析仪连接的扫描电子显微镜分析集成灰分颗粒中元素的分布。纸质污泥中存在的碳酸钙，碳酸镁和高岭土在600℃以下的温度下通过融合在感染过程中通过融合转化为凝胶素。在东京大都市地区采样垃圾灰烬的垃圾灰分的基本分析表明，钙，硅酸盐和铝是主要成分，这表明这些元素起源于纸张填充剂。然而，这些垃圾的灰分样品含有5-20％的水溶性部分。通过煮沸水的提取，从垃圾灰分样品中获得具有相似X射线衍射图的低晶化合物。到目前为止，即使通过各种试验，也无法将灰烬焚化的纸污泥的亮度提高到70％以上。将纸污泥焚化的灰分添加到纸库存中，以评估包含灰分作为填充剂的手纸的特性。通过使用干强度添加剂（例如阴离子PAM），可以限制拉伸指数的减少。尽管随着灰烬的添加，握手的亮度却降低了，但灰分添加可以显着提高不透明度。