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標題: 靜電提昇旋風集塵器收集次微米微粒效率之研究
Eohanced Collection Efficiency of Submicron Particles by Electrocyclone
作者: 廖俊賢
Liao, Chun-Shien
關鍵字: Electrocyclone;靜電旋風集塵器;Collection efficiency;Submicron particles;Ammonium chloride;收集效率;次微米微粒;氯化銨微粒
出版社: 環境工程學系
塵器對次微 米微粒收集之可行性。實驗採用的靜電旋風集塵器為
sTAIRMAND高效率切線進氣式,其電 極棒置於出口管中央,兩個測試的
旋風集塵器直徑為13.3公分及25.0公分,測試4種不同 粗、細、長、短
行,旋風集塵器入口流速控制在5.7 ~ 26.0 M/S之間,施加電壓介於0 ~
50 Kv,次微米 微粒的來源為在實驗室中利用曝氣法混合hcL及 nh4oh而
生成之氯化銨微粒。. 研究結 果顯示,於旋風集塵器內施加電場可大
幅提昇對次微米微粒之收集效率,總質量收集效率 皆隨入口氣流速度的
增加而減小,效率最高可達86 %。電極棒的直徑愈小,有愈佳的效能 表
經濟效益。一 般而言,尺寸大的旋風集塵器於相同的操作條件下效率較
的效率與尺寸無關,此結果顯示每單位體積流率 所消耗之電暈功率為決

The submicron particles were the most difficult to be collected
by the conve ntional dust removal devices. The purpose of this
study was to investigate the applicability of using an
electrocyclone to collect the submicron particles. The
electrocyclone were Stairmand high-efficiency and tangential
inlet-type wi th electrode inserted into the center of cyclone
outlet. Two cyclones were tes ted in this study and their
diameters were 13.3 cm and 25.0 cm. Totally four e lectrodes of
various diameters and lengthes were used and the experiments
were conducted under various inlet flow velocities, applied
voltages, and mass loa dings. The inlet velocities and the
applied voltages were varied between 5.7 t o 26.0 m/s and 0 to
50 kV, respectively.The submicron particles were ammonium
chloride aerosols generated by mixingthe vapors of HCl and NH4
OH. The results showed that The electric field significantly
improve theperformance of submic ron particles. Such
enhancement effect was reduced withhigher flow rate. The b est
collection efficiencies of the ammonium chlorideaerosols by the
electrocyc lones could achieve to 86 %. Thinner electrode was
more effective than the thi ck one. However the shorter
electrode was found more economical. In general th e larger
electrocyclone was less effective than the smaller one under the
same operational condition, but both had the same efficiency
when both consumed th e same corona power ratio. It indicated
that the corona power ratio was the un ique parameter to
determine the collection efficiency of the submicrone partic
les by using electrocyclone.
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