FGD石膏煅烧过程中汞释放特性研究  

Characteristic of mercury release during FGD gypsum calcination

作　　者：李立[1] 金晶[1] 樊俊杰[1] 江鸿[1] 刘瑞[1] 潘为平 

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]美国西肯大学燃烧科学与环境技术研究所,美国ky42101

出　　处：《上海理工大学学报》2009年第4期332-335,共4页Journal of University of Shanghai For Science and Technology

摘　　要：研究了空气气氛在40℃/min的升温速率条件下,4种FGD石膏加热过程中汞的释放规律,探讨以FGD石膏为原料生产石膏产品的煅烧和加热工艺过程中汞的再排放特性.研究结果表明,汞析出的主要温度段是200℃~400℃段,随着温度的继续升高,汞析出量逐渐下降;进一步对汞的析出形态分布进行了探讨,表明FGD石膏加热过程中,零价汞（Hg0）的释放量通常高于二价汞（Hg2＋）.The attention was focused on the mercury release of four FGD gypsums during heating process with the heating rate of 40 ℃/min under air atmosphere.The characteristic of mercury release during FGD gypsum heating and calcining was analysed.The results indicate that the mercury discharge in four FGD gypsum samples is mainly related to the temperature range of 200 ℃ to 400 ℃,and beyond that range the release rate will descend with the increase of temperature.In the ingredient distribution of mercury release,elemental mercury（Hg0）discharges more than divalent mercury（Hg2＋） during the heating of FGD gypsum.

关 键 词：汞 再释放 FGD石膏 循环利用 

分 类 号：X7[环境科学与工程—环境工程]