| 摘要 |
PURPOSE:To collect efficiently high resistance dust by impressing an intermittent DC voltage between dust precipitating electrodes deposited thereon with high electric resistance powder and discharge electrodes. CONSTITUTION:Powder 3 having high electric resistivity such as alumina powder or the like is deposited on the surface of plural dust precipitating electrodes 1 in an electrical dust precipitator disposed oppositely with the electrodes 1 and discharge electrodes 2. The charge on the electrodes 2 is so controlled that a DC high voltage is impressed intermittently at a period of 0.01-1sec by a control circuit X. Then a back discharge phenomenon is not generated in spite of the conditions in the back discharge region and the efficiency in dust precipitation is improved.
|
