Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

A Study of Fly Ash Resistivity Characteristics Generated from the Coal Fired Power Plant as a Function of Water Concentration and Temperature

석탄 화력발전소에서 발생되는 석탄회의 수분함유량 및 온도에 따른 비저항성 특성 연구

  • 구재현 (부산대학교 공과대학 대학원) ;
  • 이정언 (부산대학교 공과대학 대학원) ;
  • 이재근 (부산대학교 기계기술연구소)
  • Published : 2000.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

Recent studies have been directed toward obtaining a better understanding of the application of electrostatic precipitators to collect fly ash particles produced in a coal-fired power plant. Electrical resistivity can be described as the resistance of the collected dust layer to the flow of electrical current and is an important property for the collection efficiency in the electrostatic precipitator. In this paper, fly ash resistivity as a function of temperature up to $450^{\circ}C$ has been experimentally investigated using the resistivity meter consisted of the movable electrode, dust cup, and furnace. Resistivity was found to increase with increased temperature up to $200^{\circ}C$ due to the reduction of water concentration and then gradually decrease with increased temperature due to the activation of electrons. As the resistivity of fly ash in the flue gas temperature of $150^{\circ}C$ was measured >$10^{10}$ ohm cm, the efficiency of fly ash removal in the electrostatic precipitator might be expected to be low due to back-corona phenomenon. Flue gas conditioning in the electrostatic precipitator to reduce the resistivity of fly ash as required.

Keywords

References

  1. Beachler, S. D. and Jahnke, J. A., 1981, APTI Course 4/3 Control of Particulate Emissions Student Manual
  2. Oglesby, S. J. and Nichols, G. B., 1978, Electrostatic Precipitation, Marcel Dekker, Inc., New York and Basel
  3. Theodore, L. and Reynolds, J., 1983, 'Control Technology News: ESP Bus Section Failures: Design Considerations,' Journal of the Air Pollution Control Association, 33(12), 1215-1218
  4. White, H. J., 1984, '전기집진기(Electrostatic Precipitators),' 대기오염방지공학, 김동술 역, 신광문화사, pp. 133-158
  5. White, R. I., 1977, 'Electrostatic Precipitation of Fly Ash,' Journal of the Air Pollution Control Association, 27(4), 308 - 318
  6. White, H. I., 1977, 'Electrostatic Precipitation of Fly Ash,' Journal of the Air Pollution Control Association, 27(2), 114-120
  7. 김종석, 조병환 공저, 1991, 대기오염 방지기술, 동화기술
  8. McDonald, J. R., and Dean, A. R., 1982, Electrostatic Precipitator Manual, Noyes Data Corp., pp. 215-331
  9. ASME PTC-28, 1965, Determining the Properties of Fine Particulate Matter. Section 4.05, Method for Determination of Bulk Electrical Resistivity, pp. 15-17
  10. Bickelhaupt, R. E., 1979, 'A Technique for Predicting Fly Ash Resistivity,' EPA-600/7-79-204, Environmental Protection Agency, Research Triangle Park
  11. 이재근, 하만영, 김경천, 김귀순, 구재현, 1995, '온도와 수환함유량 변화에 의한 Fly Ash의 비저항생 특성연구,' 대한기계학회 춘계 학술대회논문집(II), pp. 517-522
  12. 하만영, 이대래, 안승표, 김경천, 이재근, 김귀순, 박호동, 1996, '파울링 예측을 위한 가스-입자 유동 해석(1) - 고온 풍동 설계 및 성능 실험,' 대한기계학회논문집, 제20권, 제11 호, pp. 3695-3705
  13. 조형회, 이재근, 박호동, 서태원 (1998) '분체 이송관내 압력 조절을 위한 오리피스 주위에서의 입자 유동 및 마모해석,' 대한기계 학회논문집 B권, 제22권, 제 11호, pp 1499-1508
  14. 이정언, 이재근 (1998), '석탄연소 보일러에서 생성된 석탄회의 분석과 형성메카니즘 해석에 대한 연구,' 대한기계학회논문집 B권, 제22권, 제12호, pp. 1691-1701