A multi-phase AC arc discharge and its application in in-flight thermal treatment of raw glass powders

Yao, Yao; Hossain, M. Mofazzal; Watanabe, Takayuki; Matsuura, Tomoaki; Funabiki, Fuji; Yano, Tetsuji

doi:10.1016/j.cej.2007.11.016

Cited by 18 publications

(13 citation statements)

References 16 publications

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“…The detailed electrical circuit and vector diagrams for converting from 3‐phase AC to 12‐phase AC were reported by Yao et al . and Matsuura et al …”

Section: Methodsmentioning

confidence: 92%

“…The detailed electrical circuit and vector diagrams for converting from 3-phase AC to 12-phase AC were reported by Yao et al and Matsuura et al . 7,8 Several different electrode configurations can be obtained by changing the power cable sequence connected with the electrodes. 9,10 The idea of voltage waveforms follow the phase sequence 1-12 is shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

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Investigation of In‐Flight Glass Melting by Controlling the High‐Temperature Region of Multiphase AC Arc Plasma

Liu

Tanaka

Choi

et al. 2014

Int J of Appl Glass Sci

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A large volume discharge produced by a stable 12-phase alternating current (AC) arc plasma is preferable to melt the granulated glass materials for time and energy saving. The discharge behavior and the high-temperature region of the plasma system can be controlled by the electrode configurations. In this study, the spatial characteristics of the arc discharge were examined by image analysis with a high-speed camera. The melting characteristics of alkali-free glass particles were investigated by microscope and X-ray diffractometry. This is the first time to investigate the relationship between spatial characteristics of plasma and glass particle property. Results show the arc existence area is strongly related to the electrode configuration. Distributions of in-flight powders and the spatial characteristics of arc are important factors when using multiphase AC arc for in-flight melting. This study provides information of efficient particle treatment according to the electrode configuration.

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“…The detailed electrical circuit and vector diagrams for converting from 3‐phase AC to 12‐phase AC were reported by Yao et al . and Matsuura et al …”

Section: Methodsmentioning

confidence: 92%

Section: Methodsmentioning

confidence: 99%

Investigation of In‐Flight Glass Melting by Controlling the High‐Temperature Region of Multiphase AC Arc Plasma

Liu

Tanaka

Choi

et al. 2014

Int J of Appl Glass Sci

View full text Add to dashboard Cite

show abstract

“…The output lines from the transformers were directly connected to the corresponding electrodes of the reactor. The detailed electrical circuit and vector diagrams for converting from 3-phase to 6 or 12-phase were reported by Yao et al [6] and Matsuura et al [13]. The 12 electrodes configuration was symmetrically distributed at an angle of 30 degree.…”

Section: Setup and Image Analysismentioning

confidence: 98%

“…This can be achieved by releasing the decomposed gas from the raw material during powder injection. Under a New Energy and Industrial Technology Development Organization (NEDO) project, a new in-flight melting technology with multi-phase AC arc was successfully developed for the glass industry [4][5][6].…”

mentioning

confidence: 99%

Characteristics of Multi-Phase Alternating Current Arc for Glass In-Flight Melting

Yao

Yatsuda

Watanabe

et al. 2009

Plasma Chem Plasma Process

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An innovative in-flight melting technology with multi-phase AC arc was developed for glass industry. The enthalpy probe and high speed video camera were used to characterize the temperature, velocity, and discharge behavior of multi-phase AC arc. The effects of input power and sheath gas flow rate on arc and melting behavior were investigated. Results show that the temperature and velocity on arc center are increased with input power or sheath gas flow increase. The fluctuation of luminance area ratio and coefficient of variation reflects the change of arc discharge behavior. High temperature of plasma enhances the melting of granulated raw particles during in-flight heating treatment. The shrinkage of particle and the volatilization degree of Na 2 O increase under a larger flow rate of sheath gas. The characterized arc behavior agrees with the melting behavior of glass raw materials, which can provide valuable guidelines for the process control of glass melting.

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“…Under the support of the New Energy and Industrial Technology Development Organization (NEDO) in Japan, an innovative in-flight glass-melting technology was developed [1][2][3][4][5][6]. The concept of the in-flight melting for glass production is illustrated in Fig.…”

Section: Introductionmentioning

confidence: 99%

Innovative in-flight glass-melting technology using thermal plasmas

Watanabe

Yatsuda

Yao

et al. 2010

Pure and Applied Chemistry

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A stable 12-phase AC arc was generated by transformers at a commercial electric power system, and the arc behavior was characterized by image analysis. For the unique advantages, the multiphase AC arc was developed to apply to in-flight glass melting for the purpose of energy-saving and emission reduction. The effects of electrode configuration and sheath gas flow rate on the arc and melting behavior of granulated glass raw material were investigated. Results show that the discharge behavior and the high-temperature region can be controlled by the electrode configuration. The luminance area of the high-temperature region and its fluctuation reflect the discharge behavior. The vitrification degree of glass raw material is mostly dependent on the center temperature of arc. As sheath gas flow rate increases, the ratio of luminance area decreases and the center temperature of arc increases.

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A multi-phase AC arc discharge and its application in in-flight thermal treatment of raw glass powders

Cited by 18 publications

References 16 publications

Investigation of In‐Flight Glass Melting by Controlling the High‐Temperature Region of Multiphase AC Arc Plasma

Investigation of In‐Flight Glass Melting by Controlling the High‐Temperature Region of Multiphase AC Arc Plasma

Characteristics of Multi-Phase Alternating Current Arc for Glass In-Flight Melting

Innovative in-flight glass-melting technology using thermal plasmas

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