Effect of voltage waveform on partial discharge in ferroelectric pellet layer for gas cleaning

Journal Article · · IEEE Transactions on Industry Applications (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/IAS.1990.152152· OSTI ID:6034077

Mizuno, A ^[1]; Yamazaki, Y ^[2]; Obama, S ^[3]; Suzuki, E ^[4]; Okazaki, K ^[5]

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1. Toyohashi Univ. of Technology (Japan). Dept. of Ecology Engineering
2. ULVAC Corp., Kanagawa (Japan). Ion Beam Group
3. Sumitomo Metal and Mining Co., Ltd., Yokohama (Japan). Yokohama Works
4. Electric Power Development Co., Ltd., Tokyo (Japan)
5. Tokyo Inst. of Technology (Japan)

The authors have suggested a process for the simultaneous removal of dusts and gaseous pollutants. Characteristics of the partial discharge in a ferro electric pellet layer have been studied using ac voltages with varying frequency or using square wave voltages. The capacitance of the layer, Ct, consists of the capacitance of each ferroelectric pellet, Cp, and the capacitance of the air gap between each pellet, Cg. Since Cg is much smaller than Cp, the capacitance of the layer is determined mainly by Cg. Therefore the packing of ferroelectric pellets with a large dielectric constant does not increase the value of Ct significantly, and an excessive increase in the capacitive charging current can be avoided. With an ac voltage application, the partial discharge takes place when the voltage crosses zero, and ceases when the voltage reaches positive or negative peak value. With the increase in frequency of the ac voltage, the period of the partial discharge is widened, and the maximum value of the current pulse, Ip max is increased. At higher frequency, the partial discharge can be generated in a pellet layer with smaller dielectric constant values. When a square wave voltage is applied, a very large current can be obtained during the transient period of the voltage. The value of Ip max should affect the plasma temperature of each pulsive discharge, and should affect the efficiency of the plasma chemical reaction for each discharge. Reaction speed should be proportional to the number of the pulsive discharges for 1 s. The gas cleaning performance of the partial discharge can be adjusted by varying the dielectric constant value, the voltage waveform, and the frequency.

• OSTI ID: 6034077
• Journal Information: IEEE Transactions on Industry Applications (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Industry Applications (Institute of Electrical and Electronics Engineers); (United States) Vol. 29:2; ISSN 0093-9994; ISSN ITIACR
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
BEAMS
CAPACITANCE
CLEANING
CONTROL
DEASHING
DIELECTRIC PROPERTIES
ELECTRIC DISCHARGES
ELECTRIC POTENTIAL
ELECTRICAL PROPERTIES
ELECTRON BEAMS
FERROELECTRIC MATERIALS
FLUIDS
FREQUENCY DEPENDENCE
GASES
IRRADIATION
LAYERS
LEPTON BEAMS
OPERATION
PARTICLE BEAMS
PHYSICAL PROPERTIES
PULSE TECHNIQUES
SEPARATION EQUIPMENT
SEPARATION PROCESSES
WAVE FORMS