Continuous Monitoring and Mechanism of Electrostatic Charge of Powder in Fluidized Bed Process
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概要
- 論文の詳細を見る
In a previous paper (Watano et al., J. Soc. Powder Technol. Jpn, 34,778,1997), we developed a novel system which could continuousy monitor the electrostatic field strength of powder in a fluidized bed process. This paper reports further study related to the electrostatic characteristics of powder. Two novel achievements are described; one is an improvement of the reliability and accuracy of the sensor, and the other is the mechanism and characteristics of the electrostatic charge for different kinds of powder materials. First, the structure of the sensor extremity has been improved to remove the troubles encountered in the previous sensor. By using a double-walled cylinder, the sensor is devised to tolerate severe vibration, high purge air flow and particle sticking. By increasing the sensitivity, the accuracy of measurement can be increased by approximately five times that of the previous sensor. Secondly, the relationship between electrostatic field strength and the electrical charge of the particles has been investigated using various kinds of powder materials. The sensor shows a good linearlty between two measurements, proving that the electrostatic characteristics of charged particles could be monitored correctly via the electrostatic field strength. The performance of the system has been confirmed in the fluidized bed granulation/drying processes using different kinds of particles. The mechanism of the electrostatic charge for different kinds of powdered materials are also discussed.
- 公益社団法人日本薬学会の論文
- 1998-09-15
著者
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Watano Satoru
Department Of Chemical Engineering Graduate School Of Engineering Osaka Prefecture University
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Miyanami Kei
Department Of Chemical Engineering Osaka Prefecture University
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Suzuki Teruo
Department Of Chemical Engineering Osaka Prefecture University
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TAIRA Toshinari
Department of Chemical Engineering, Osaka Prefecture University
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Taira Toshinari
Department Of Chemical Engineering Osaka Prefecture University
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