使用添加剂调制钙基脱硫剂  

Sulfation mechanisms of Ca-based absorbent modified by metal oxides

作　　者：任雯[1] 赵博[1] 王瑜[1] 禚玉群[1] 雷俊勇[2] 李彦[1] 陈昌和[1] 

机构地区：[1]清华大学热能工程系,热科学与动力工程教育部重点实验室,北京100084 [2]北京石油化工学院,机械工程系,北京102617

出　　处：《清华大学学报（自然科学版）》2010年第7期1037-1041,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家“九七三”重点基础研究项目(2006CB200300);国家自然科学基金青年科学基金项目(50906044)

摘　　要：提高钙基脱硫剂的钙利用率一直是烟气脱硫工艺的重要方面。该文以联合脱除SO2和NOx为研究背景,重点研究以飞灰做为载体,添加金属硝酸盐、碳酸盐和磷酸盐等添加剂,对调质后的钙基脱硫剂在350℃窗口进行脱硫性能实验。实验结果表明:添加剂调质后的脱硫剂固硫能力均有不同程度的提高。研究发现金属硝酸盐、碳酸盐能够显著提高脱硫剂在此温度段的固硫效果。The fast development of coal-fired power plants has resulted in heavy emissions of SO2 and NOx,which contribute about half of China＇s industrial gaseous pollutant emissions.The sulfation characteristics of a limestone sorbent modified by a metal salt were investigated in this paper.Various metal salts were used as additives,such as nitrates,carbonates,and phosphates.The modified absorbents were tested at 350 ℃ in a thermogravimetric analyzer and sulfur determination device.The experiments show that almost all the additives improve the calcium conversion rate of the absorbent,with nitrate and carbonate having better performance than the others.

关 键 词：脱硫 氢氧化钙 添加剂 钙利用率 

分 类 号：TK[动力工程及工程热物理]