焦油渣与污泥基活性炭的制备及其处理煤化工废水研究
Preparation of sludge based activated carbon with tar residue and its application in coal chemical industrial wastewater treatment
冉令慧 1金学坤 2李晓辉 1邹海旭 1曹卫东1
作者信息
- 1. 伊犁新天煤化工有限责任公司,新疆 伊犁 835004
- 2. 清华大学 环境学院,北京 100085
- 折叠
摘要
利用焦油渣、沥青与少量淀粉、酚醛树脂、羧甲基纤维素等,复配出廉价的环保粘结剂配方;以气化筛余物(粉煤)、生化污泥为原料,通过挤压成型、碳化、活化工艺制备活性炭,开展公斤级半中试试验,确定其最优炭化时间为 50 min,炭化温度为 600℃,活化时间为2.5 h,活化温度为 900℃,得炭率达 40%.制备所得的4mm柱状活性炭产品,中孔结构较发达,强度为 92.8%,碘值为 611 mg/g,比表面积为 302.54 m2/g,达到GB/T 7701-2008《煤质颗粒活性炭》的各项指标要求,对煤化工园区污水处理厂尾水COD有较好的去除效果.
Abstract
A cost-effective and environmental friendly adhesive formula was prepared by tar residue,asphalt and a small amount of starch,phenolic resin,carboxymethyl cellulose and some other materials.Using gasification residue(coal powder),biochemical sludge as raw materials to prepare activated carbon,a kilogram scale semi pilot experiment was conducted through extrusion molding,carbonization,and activation processes.The optimal condition was determined as follows:the carbonization time and temperature were 45 min and 700℃respectively,the activation time and temperature were 3 h and 900℃respectively,the carbon product yield reached 40%.The prepared 4 mm columnar activated carbon product has a well-developed mesoporous structure with a strength of 92.8%,an iodine value of 611 mg/g,and a specific surface area of 302.54 m2/g,fully meeting the requirements of various indicators of GB/T 7701-2008 Granular activated carbon from coal;besides,in coal chemical industrial park,good COD removal effect was obtained.
关键词
焦油渣/生化污泥/柱状活性炭/工艺与配方/煤化工废水Key words
tar residue/biochemical sludge/columnar activated carbon/process and formula/wastewater from coal chemical industry引用本文复制引用
基金项目
新疆维吾尔自治区重点研发计划(2022B01001)
出版年
2024
NETL
NSTL
万方数据