烟气湿法脱硫中阻垢剂对石膏结晶特性的影响  

Effect of Scale Inhibitor on Crystallization Characteristics of Gypsum in Wet Flue Gas Desulfurization

作　　者：李刚 肖海平[1] 梁伦涛 孙保民[1] 李晓峰 LI Gang;XIAO Haiping;LIANG Luntao;SUN Baomin;LI Xiaofeng(School of Energy,Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China;Datang Environment Industry Group Co.,Ltd.,Beijing 100097,China)

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206 [2]大唐环境产业集团股份有限公司,北京100097

出　　处：《动力工程学报》2022年第3期263-268,共6页Journal of Chinese Society of Power Engineering

基　　金：青年科学基金资助项目(51706070)。

摘　　要：在结晶实验台架上进行阻垢剂作用下的石膏结晶反应实验,对石膏成核、生长和形貌变化进行研究。结果表明:阻垢剂能够推迟石膏结晶诱导时间,抑制石膏成核;阻垢剂吸附在晶胚表面上,导致晶体畸变和粒径增大,促进了石膏生长;阻垢剂质量浓度由1 mg/L增加到20 mg/L时,无磷阻垢剂和磷系阻垢剂的成核抑制指数分别增加15~16倍和13~14倍,石膏生长速率分别升高8~9倍和6~7倍;阻垢剂的畸变作用导致石膏晶体由针状转化为片状和团簇状晶体,随阻垢剂质量浓度增加,石膏晶体团簇半径增大。The gypsum crystallization reaction experiment under the action of scale inhibitor was carried out on the crystallization test bench to study the nucleation,growth and morphology change of gypsum.Results show that the scale inhibitor could delay the induction time of gypsum crystallization and inhibit gypsum nucleation.The scale inhibitor is adsorbed on the prenuclear cluster or the surface of the embryo,resulting in the crystal of gypsum distortion and particle size increase,which promote the growth of gypsum.When the concentration of scale inhibitor is increased from 1 mg/L to 20 mg/L,the nucleation inhibition indexes of non-phosphorus and phosphorus series scale inhibitor are increased by 15~16 times and 13~14 times,and the growth rates of gypsum are increased by 8~9 times and 6~7 times,respectively.The distorion of scale inhibitor leads to the transformation of the gypsum crystal from needle to sheet and cluster shape.The radius of gypsum crystal cluster increases with the increase of scale inhibitor concentration.

关 键 词：阻垢剂 石膏 结晶 成核 生长 形貌 

分 类 号：X773[环境科学与工程—环境工程]