Development of high-performance electrostatic filter utilizing coagulating effect of a. c. electric field
| Project/Area Number |
14550123
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
設計工学・機械要素・トライボロジー
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| Research Institution | Toyohashi University of Technology |
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Principal Investigator |
YANADA Hideki Toyohashi University of Technology, Faculty of Engineering, Associate Professor, 工学部, 助教授 (90166554)
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| Project Period (FY) |
2002 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 2003: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2002: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | Electrostatic filter / A. C, electric field / D.C. electric field / Insulating liquid / Coagulation / Reuse / Decrease in waste / Contamination control / 静電ブィルタ / 静電ろ過 / 凝集促進 / 汚染粒子 |
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| Research Abstract |
In this research, three types of a new electrostatic liquid filter that utilizes both a. c. and d. c. electric fields, which has been proposed by Yanada, were manufactured on an experimental basis. Two filters are cylindrical in shape and one has a rectangular cross-section : Those three filters consist of the coagulating part, where an a, c. electric field is applied to make minute contaminant particles be coagulated, and of the capturing part, where a d. c. electric field is applied to capture the particles. In the cylindrical filters, the coagulating part is arranged on the outer part of the cylinder and the capturing part in the inner part of the cylinder. Only the difference in the two cylindrical filters is the flow direction in the coagulating part, that of one filter is the direction of the axis and that of another one is circumferential. The difference in the flow direction in the coagulating part leads to a difference in the magnitude of the velocity gradient in the passage there. The rectangular filter was manufactured to examine the effects of the shape and arrangement of the collector and electrode in the capturing part on the filter performance. It is shown that the filtration speed can be approximately doubled by utilizing both the a. c. and d, c. electric fields compared to the case where only the d. c. electric field is used, and the usefulness of the electrostatic liquid filter proposed is demonstrated. The comparison between the performance of the two cylindrical filters shows that the magnitude of the velocity gradient in the passage in the coagulating part strongly affects the filter performance. In addition, it is shown that the filter performance can be increased by appropriately designing the shape and arrangement of the collectors and electrodes in the capturing part.
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Report
(3 results)
Research Products
(6 results)
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[Publications] Imaizumi, T., Kawakami, Y., Matsuda, K., Ohkubo, F., Yanada, H.: "Electrostatic Liquid Filter Utilizing Coagulating Effect of A. C. Electric Field (Performance Evaluation of Actual Filter Models)"Proceedings of the 53rd Annual Meeting of Tokai Branch, the Japan Society of Mechanical Engineers. No.043-1. 159-160 (2004)
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