不同阻垢剂官能团对脱硫石膏结晶的影响  

Effect of Different Scale Inhibitor Functional Groups on Crystallization of Desulfurized Gypsum

作　　者：赫祥宇 肖海平[1] 周政 梁伦涛 雷兢 韩振兴 HE Xiangyu;XIAO Haiping;ZHOU Zheng;LIANG Luntao;LEI Jing;HAN Zhenxing(School of Energy Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,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

出　　处：《锅炉技术》2024年第4期1-6,共6页Boiler Technology

基　　金：国家自然科学基金(51706070)。

摘　　要：为评价不同循环水阻垢剂成分对脱硫石膏品质的作用,选用含特定官能团的6种单一成分阻垢剂进行成核试验和生长试验,研究其对石膏结晶过程的影响。成核试验中,含磺酸基阻垢剂使石膏结晶诱导时间缩短3.2%,磺酸基提高硫酸钙过饱和度,有利于石膏成核。含膦酸基和羧基阻垢剂使石膏结晶诱导时间延长6.5%~45.2%,抑制石膏成核。生长试验中,含磺酸基阻垢剂使石膏粒径减小30.3%,细碎石膏结晶增多。含膦酸基和羧基阻垢剂使石膏粒径增大21.5%~72.6%,石膏形貌发生畸变,出现片状孪晶。膦酸基和羧基主要通过吸附作用使石膏特定位置生长速率改变,使石膏发生畸变,有利于石膏生长。因此,含羧基官能团的阻垢剂对石膏品质负面影响最小,更适合作为全厂废水零排放背景下的循环水阻垢剂。In order to evaluate the effect of different circulating water scale inhibitors on the quality of desulfurized gypsum,six single-component scale inhibitors containing specific functional groups were selected for nucleation and growth experiments,and their effects on the crystallization process of gypsum were studied.In the nucleation experiment,scale inhibitors containing sulfonic acid group can shorten the induction time of gypsum crystallization by 3.2%,and sulfonic acid group can increase the supersaturation of calcium sulfate,which is conducive to gypsum nucleation.Phosphonic acid group and carboxyl group scale inhibitors can prolong the induction time of gypsum crystallization by 6.5%-45.2% and inhibit gypsum nucleation.In the growth experiment,the size of gypsum was reduced by 30.3% by sulfonic acid group-containing scale inhibitor,and the fine gypsum crystals were increased.Phosphonic acid group and carboxylic group scale inhibitor make gypsum particle size increases by 21.5%-72.6%,causing gypsum morphology distortion and flake twin.Phosphonic acid group and carboxylic group can change the growth rate of gypsum in specific position through adsorption,which distorts gypsum and is conducive to gypsum growth.Therefore,the scale inhibitor containing carboxyl functional group has the least negative effect on the quality of gypsum,and is more suitable to be used as the scale inhibitor of circulating water under the background of zero discharge of wastewater in the whole plant.

关 键 词：脱硫石膏 阻垢剂 晶体 生长 

分 类 号：X701[环境科学与工程—环境工程]