脱硫脱硝制酸废水中S的形态及其去除研究  

Research on the form and removal of Sulfur in acid-making wastewater generated from process of desulfurization and denitration

作　　者：杨本涛 彭杰[1] 何凯琳 魏进超[1,2] 刘义 Yang Bentao;Peng Jie;He Kailin;Wei Jinchao;Liu Yi(Zhongye Changtian International Engineering Co.,Ltd.,Changsha 410205,Hunan;Key Laboratory of Hunan Province for the Synergetic Control and Resource Reuse of the Multi-pollutants of Flue Gas,Changsha 410205,Hunan)

机构地区：[1]中冶长天国际工程有限责任公司,湖南长沙410205 [2]烟气多污染物协同治理及资源化湖南省重点实验室,湖南长沙410205

出　　处：《烧结球团》2020年第2期56-60,共5页Sintering and Pelletizing

基　　金：湖南省重点研发计划资助项目(2018SK2026);湖南省自然科学基金资助项目(2018JJ3894);中国科协“青年人才托举工程”资助项目(2018QNRC001)。

摘　　要：活性炭烟气脱硫技术在烧结厂得到了广泛应用。在活性炭的高温再生过程中,会形成单质S。单质S被洗涤时,会形成S胶体进入制酸废水。S胶体因具有强粘结性,若不去除,易导致设备堵塞。因此,需系统分析单质S的形态特征,并开发针对性的去除技术。本文采用Raman、FTIR等方法分析单质S的形态,利用浊度法分析S在废水中的变化特征。基于电荷中和的原理,利用S胶体与废旧活性炭粉的复合实现快速分离,S胶体去除率可达99%以上。新方法的应用避免了S胶体进入废水处理系统和后续制酸系统,且分离后的活性炭粉复合物可返烧结做燃料使用。Flue gas desulfurization technology using activated carbon has been widely applied in sintering plants.The elemental sulfur could be formed during the high-temperature regeneration of the activated carbon.While the elemental sulfur is scrubbed,the sulfur colloid would form and enter into the wastewater generated during the acid-making process.The sulfur colloid is liable to blocking the equipment for its high viscosity and it is difficult to remove.Thus,it is necessary to make a systematic analysis on the morphological characteristic of elemental sulfur,and develop the targeted removal technique.In this paper,such methods as FTIR and Raman spectroscopy are adopted to analyze the form of the elemental sulfur,and the nephelometry is used to analyze the changing law of the sulfur in the wastewater.Based on the electric charge neutralization principle,a quick separation is achieved where the removal of sulfur colloid could reach more than 99%under the recombination of sulfur colloid and waste activated carbon powder.The application of the innovative method prevents the sulfur colloid from getting into the wastewater treatment system and the sequent acid-making system,and the separated activated carbon powder complex could be reused as fuel in sintering process.

关 键 词：制酸废水 S形态 活性炭粉 吸附 

分 类 号：TF046.4[冶金工程—冶金物理化学] X703.1[环境科学与工程—环境工程]