摘要
常用的烟气脱硫工艺有钙法、氨法、镁法、钠法、海水法、活性炭法,工艺不同副产物的种类和状态也不相同。脱硫副产物的出路是脱硫工艺选择的重要参考因素。对比了6种不同烟气脱硫工艺的副产物处理和处置方法。其中,钙湿法脱硫的副产物产量最大,利用率较高,2018年我国脱硫石膏产量超过1.2亿t,其综合利用率为74%。由于脱硝及消白的需要,存在湿法改半干法的趋势,但半干法工艺的Ca/S比湿法高,这会导致利用率低的脱硫灰产量增大;钙半干法脱硫协同脱硝会导致脱硫灰处理更为困难,需要进一步加大对脱硫灰的处理研究。
The common flue gas desulfurization processes include calcium method,ammonia method,magnesium method,sodium method,seawater method and activated carbon method.The types and states of by-products are different with different processes.The outlet of desulfurization by-products is an important reference factor for the selection of desulfurization process.The by-product treatment methods of six different FGD processes were compared.Among them,the by-product production of calcium wet desulfurization is the largest,with a high utilization rate.In 2018,the output of desulfurization gypsum in China exceeded 120 million tons,and its comprehensive utilization rate was 74%.Due to the need of denitrification and whitening,there is a trend of changing wet process to semi dry process.However,the Ca/S ratio of semi dry process is higher than that of wet process,which will lead to the increasing of desulfurization ash yield with low utilization rate;calcium semi dry desulfurization combined with denitration will make desulfurization ash treatment more difficult,and further research on desulfurization ash treatment is needed.
作者
王建华
王东
朱繁
邱明英
董艳苹
史光
Wang Jianhua;Wang Dong;Zhu Fan;Qiu Mingying;Dong Yanping;Shi Guang(Environmental Protection and Heating Ventilation Department of CERI, Beijing, 100176;Henan Jiyuan Iron and Steel (Group)
出处
《河北冶金》
2020年第7期79-82,共4页
Hebei Metallurgy
基金
国家重点研发计划,“大气污染成因与控制技术研究”专项,“焦炉烟气全干法净化及硫的资源化利用”课题(2018YFC0213401)
烧结烟气净化氧化法脱硝及湿烟气消白工艺及装备开发(YF18080)。
关键词
烟气脱硫(FGD)
脱硫副产物
烧结球团
焦化
脱硫灰
石膏
flue gas desulfurization(FGD)
desulfurization by-products
sintering pellet
coking
desulfurization ash
gypsum
