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Influence of H2O and SO3 on fine particles coagulation for sintering flue gas after desulfurization in an alternating electric field
Wang, Xue1; Wu, Wan1; Zhu, Tingyu1,2
2022-01-05
Source PublicationENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN0944-1344
Pages12
AbstractElectric coagulation of fine particles has been studied in the simulated sintering flue gas after semi-dry desulfurization to quantify the influence of H2O and SO3. The electric coagulation platform has a DC charging zone and an AC coagulation zone. Fine particles were divided into different diameter intervals to deeply explore the impact of H2O and SO3, including less than 0.15 mu m (PM0.15), 0.15-0.5 mu m (PM0.15-0.5) and 0.5-1 mu m (PM0.5-1). The particle charge, mass fractions of fine particles, and the mean diameter are measured and compared under water and SO3 atmosphere. The experiments showed that the increasing AC voltage helps particles larger than 0.5 mu m to coagulate but has little effect on the rest particles without H2O or SO3. Both H2O and SO3 enhance the PM1.0 AC coagulation. When flue gas relative humidity went up from 20 to 80%, the charge per particle maximally increased by 120%, as well as the mass fraction of PM0.5-1, PM0.15-0.5, and PM0.15 decreased by 83.2%, 64.5%, and 66.6%, respectively. When the SO3 concentration rose up from 0 ppm to 12.3 ppm, the charge per particle maximally increased by 100%, as well as the mass fractions of PM0.5-1, PM0.15-0.5, and PM0.15 decreased by 54.5%, 28.6%, and 33.3%, respectively. The impact of water and sulfuric mist on the particle intervals was sequenced as: PM0.5-1 > PM0.15 > PM0.15-0.5. The influence on PM1.0 AC coagulation was sequenced as H2O > sulfuric mist > AC voltage. Through data regression, H2O had approximate linear correlation with the particle mass fractions while the impact of sulfuric mist was non-linear. The interparticle forces were calculated to analyze the dominant force of particle AC coagulation with water: liquid bridge force > Coulomb force > > van der Waals force. The liquid bridge force indicated that liquid film was form on the surface of fine particles when water or sulfuric mist was added into the system which was the main reason enhancing the AC coagulation.
KeywordPM1 0 coagulation Alternating electric field Gas humidity Sulfuric mist Sintering flue gas Semi-dry desulfurization
DOI10.1007/s11356-021-18339-9
Language英语
WOS KeywordSULFURIC-ACID AEROSOL ; RELATIVE-HUMIDITY ; FLY-ASH ; CORONA DISCHARGE ; O-3 OXIDATION ; AGGLOMERATION ; REMOVAL ; PM2.5 ; TEMPERATURE ; NUCLEATION
Funding ProjectNational Key R&D Project of China[2017YFC0210600] ; Chinese National Nature Science Fund Projects[21607155]
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
Funding OrganizationNational Key R&D Project of China ; Chinese National Nature Science Fund Projects
WOS IDWOS:000738571600003
PublisherSPRINGER HEIDELBERG
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Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/51648
Collection中国科学院过程工程研究所
Corresponding AuthorWang, Xue; Zhu, Tingyu
Affiliation1.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China
Recommended Citation
GB/T 7714
Wang, Xue,Wu, Wan,Zhu, Tingyu. Influence of H2O and SO3 on fine particles coagulation for sintering flue gas after desulfurization in an alternating electric field[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2022:12.
APA Wang, Xue,Wu, Wan,&Zhu, Tingyu.(2022).Influence of H2O and SO3 on fine particles coagulation for sintering flue gas after desulfurization in an alternating electric field.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,12.
MLA Wang, Xue,et al."Influence of H2O and SO3 on fine particles coagulation for sintering flue gas after desulfurization in an alternating electric field".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2022):12.
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