IGCC电站脱硫系统MDEA溶液劣化问题研究  

Study on MDEA Solution Deterioration of IGCC Desulfurization System

作　　者：康建邦 王相平[1] 李金杰[1] 敦启孟 范旭 王孟[1] 刘超 Kang Jianbang;Wang Xiangping;Li Jinjie;Dun Qimeng;Fan Xu;Wang Meng;Liu Chao(Huaneng(Tianjin)IGCC Power Co.,Ltd.,Tianjin 300452,China)

机构地区：[1]华能(天津)煤气化发电有限公司,天津300452

出　　处：《煤化工》2020年第6期41-45,49,共6页Coal Chemical Industry

摘　　要：针对IGCC电站脱硫系统采用的MDEA湿法脱硫技术在实际运行中出现的MDEA溶液劣化问题,进行了原因分析,认为合成气中的HCN、NH3等组分导致了MDEA溶液中热稳定性盐的产生,增加了药品消耗、降低了脱硫效率、造成了设备腐蚀。通过增加合成气低温水洗装置,很大程度上去除了粗合成气中的杂质组分,显著缓解了MDEA溶液的劣化现象;在较低的MDEA劣化速率下,通过引入电渗析除盐装置、增加活性炭过滤器、降低再生塔加热器热源温度等措施,最终保证了脱硫效率、降低了药品消耗,实现了脱硫装置安全、经济、稳定运行。In view of the MDEA solution deterioration in the actual operation of the MDEA wet desulfurization technology adopted in the IGCC desulfurization system,the causes were analyzed.It was believed that the HCN and NH3 components in the syngas led to the generation of heat stable salts in the MDEA solution.They increased the consumption of chemicals,reduced the desulfurization efficiency,and caused the equipment corrosion.The impurity components in the crude syngas were largely eliminated and the MDEA solution deterioration was significantly alleviated by adding a low-temperature washing unit for syngas.At a lower MDEA degradation rate,by using the electrodialysis desalination device,adding the activated carbon filter and lowering the heat source temperature of the regeneration tower heater,the desulfurization efficiency was ensured,the chemical consumption was reduced,and the safe,economical and stable operation was achieved.

关 键 词：IGCC 脱硫系统 MDEA溶液 热稳定性盐 水洗 电渗析 活性炭过滤器 热源温度 

分 类 号：TM611.31[电气工程—电力系统及自动化]