摘要
基于喷淋散射技术采用前置臭氧氧化结合氨水吸收的方法,开展了烟气同时脱硫脱硝实验研究,测试了O3与NO物质的量比、SO2质量浓度、NO质量浓度、液气比和浸液深度等对脱硫脱硝效率的影响,建立了喷淋散射传质面积计算模型。结果表明:O3与NO物质的量比增大可明显提高脱硝效率;SO2质量浓度增大会促进NO2的吸收;液气比和浸液深度的增大均会使总传质面积增大,从而提高脱硫脱硝效率;在O3与NO物质的量比为1、液气比为6 L/m3的工况下,浸液深度为50 mm、氨水质量分数为0.06%时,采用喷淋散射技术后脱硫效率和脱硝效率分别可达99.6%和82.5%,均高于同参数下仅喷淋技术和仅鼓泡技术。
Experimental tests were conducted on the simultaneous removal of SO2 and NOx by combining ozone preoxidation with ammonia absorption based on spray-and-scattered-bubble technology, so as to analyze the effects of following factors on the desulfurization and denitration efficiency, such as the O3/NO molar ratio, SO2 concentration, NO concentration, liquid-gas ratio and immersion depth, etc., and to build a calculation model for the mass transfer area. Results show that the denitrification efficiency can be obviously improved by increasing the molar ratio of O3/NO. The increase in SO2 concentration will promote the absorption of NO2. With the increase of liquid-gas ratio and immersion depth, both the desulfurization efficiency and denitrification efficiency would be improved due to the extended total mass transfer area. When the molar ratio of O3/NO is 1, the liquid-gas ratio is 6 L/m3, the immersion depth is 50 mm, and the ammonia water mass fraction is 0.06%, the desulfurization efficiency and denitrification efficiency using spray scattering technology would respectively reach 99% and 82%, higher than that using single spray technology and single bubble technology under the same parameters.
作者
刘瑞琪
司桐
王春波
许紫阳
任育杰
胡健
LIU Ruiqi;SI Tong;WANG Chunbo;XU Ziyang;REN Yujie;HUJian(School of Energyt Power and Mechanical Engineerings North China Electric Power University,Baoding 071003,Hebei Province,China;China Knergy Engineering Group Co.,Ltd.,Shanghai 200061,China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2020年第7期586-592,604,共8页
Journal of Chinese Society of Power Engineering
基金
国家重点研发计划资助项目(2016YFB0600701)。
关键词
喷淋散射
脱硫脱硝
臭氧氧化
传质面积
spray-and-scattered-bubble technology
removal of SO2 and NOx
ozone preoxidation
mass transfer area
