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Thermoelectric Phenomana in High-Temperature and High-Pressure Electrostatic Precipitator and Performance Improvement

Research Project

Project/Area Number 07455092
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Thermal engineering
Research InstitutionTokyo Institute of Technology

Principal Investigator

OKAZAKI Ken  Tokyo Institute of Technology, Research Center for Carbon Recycling and Utilization, Professor, 炭素循環素材研究センター, 教授 (20124729)

Co-Investigator(Kenkyū-buntansha) HIRAI Shuichiro  Tokyo Institute of Technology, Research Center for Carbon Recycling and Utilizat, 炭素循環素材研究センター, 助教授 (10173204)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥7,700,000 (Direct Cost: ¥7,700,000)
Fiscal Year 1996: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1995: ¥6,200,000 (Direct Cost: ¥6,200,000)
KeywordsCoal Combustion / Electrostatic Precipitator / Coal Gasification / Corona Discharge / High-Temperature Precipitation / Combined Cycle / 高温高圧電気集塵 / コロナ放電 / 複合発電
Research Abstract

Efficient removal of fly ash particles from high temperature flue gas is one of the most important technologies to be developed for realizing advanced high efficiency coal utilization systems such as an integrated coal gasification combined cycle (IGCC), and ceramics filtering systems have been considered for this purpose. On the other hand, high-temperature electrostatic precipitator systems also have a high possibility to be used for gas clean-up in IGCC.But in this case, high-pressure condition should be required to maintain corona discharge. The purpose of this study is to clarify separated effects of temperature and pressure on various electric and thermal phenomena in the high-temperature and high-pressure electrostatic precipitator and to obtain fundamental knowledges necessary to develop a highly efficient high-temperature and high-pressure electrostatic precipitator. For this purpose, one-dimensional cylindrical electrostatic precipitator with a thin wire electrode at the centerline has been constructed and effects of temperature and pressure on various electric and thermal phenomena have been derived separately and then coupled effect of them on precipitation performances have been clarified.
Drastic decrease of collection efficiency at high temperature can be qualitatively explained by decrease of ion formation rate near the center electrode, decrease of particle charging rate and decrease of particle drift velocity with high kinematic viscosity and this result can be well explained by the dependency of mean free path on the temperature. The discharge mode should have changed from corona to glow mode. So, applying high pressure is definitely necessary to maintain high performance and low energy consumption in a high-temperature electrostatic precipitator.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] 石丸和博、岡崎健: "方形波無声放電による非平衡プラズマの形成機構とその特性" 日本機械学会論文集. 63,606. 609-615 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 岡崎健、安田真一、平井秀一郎: "高電圧極短パルスプラズマの構造形成過程の解析" 日本機械学会論文集. (掲載予定). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Ishimaru, K.Okazaki: "Formation Mechanism and Characteristics of Nonequilibrium Plasma by Pulsed Silent Discharge" Bull.of JSME,Ser.B. Vol.63, No.606. 609-615 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Okazaki, S.Yasuda, S.Hirai: "Analysis of Formation Process of High-Voltage Ultra-Short Pulsed Plasma" Bull.of JSME,Ser.B. (in print). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 石丸和博、岡崎健: "方形波無声放電による非平衡プラズマの形成機構とその特性" 日本機械学会論文集. 63,606(掲載予定). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 岡崎健、安田真一、平井秀一郎: "高電圧極短パルスプラズマの構造形成過程の解析" 日本機械学会論文集. (掲載予定). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Ambadi S. Kumar, Ken Okazaki: "Electrode Surface Control of Transition from Micro-Arcs to High-Current Arcs in Atmospheric-Pressure Plasmas" IEEE Transactions on Plasma Science. 23,4. 735-741 (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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