富氧燃烧气氛石灰石溶解特性研究  

The Characteristics of Limestone Dissolution under Oxy-firing Combustion Surroundings

作　　者：史晓宏 刘毅 仲兆平[3] 张锴[4] 赵凯[3] SHI Xiaohong;LIU Yi;ZHONG Zhaoping;ZHANG Kai;ZHAO Kai(ShenhuaGuohua (Beijing) Electric Power Research Institute Co., Ltd., Beijing 100025, China;Sanhe Power Generation Co., Ltd.,Sanhe 065201, China;Southeast University, Nanjing 210096, China;Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, North China Electric Power University, Beijing 102206, China)

机构地区：[1]神华国华(北京)电力研究院有限公司,北京100025 [2]三河发电有限责任公司,河北三河065201 [3]东南大学,江苏南京210096 [4]华北电力大学热电生产过程污染物监测与控制北京市重点实验室,北京102206

出　　处：《中国电力》2018年第3期155-162,共8页Electric Power

基　　金：神华集团科技创新资助项目(中国神华科[2011]368号);国家国际科技合作专项资金资助项目(2012DFB60100);国家科技支撑计划项目(2015BAA05B02)~~

摘　　要：在实验室小型试验台上研究富氧燃烧气氛下湿法脱硫用石灰石溶解特性,研究结果表明:较高的CO_2浓度对石灰石的溶解有促进作用,CO_2体积分数在80%时,石灰石的溶解速率明显增大;在相同的pH值情况下,CO_2浓度越高,石灰石的溶解速率越快。在pH=4.5时,低浓度CO_2气氛比高浓度CO_2气氛下溶解时间增加70 min,CO_2浓度对溶解速率的影响比较明显。Under the oxy-firing combustion surroundings,the characteristics of limestone dissolution used for WFGD were researched on a small-scale test rig.The results indicate that higher CO2concentration can enhance the dissolution of limestone.Especially at80%CO2concentration the rate of limestone dissolution increases significantly.The higher CO2concentration,the faster rate of dissolution under the same pH value.When pH is equal to4.5,it takes70more minutes under low CO2concentration surroundings than with the high CO2concentration surroundings.Apparently,the CO2concentration has significant impact on the limestone dissolution.

关 键 词：燃煤发电 富氧燃烧气氛 石灰石 湿法脱硫(WFGD) 溶解 CO2 浓度 

分 类 号：TM621[电气工程—电力系统及自动化]