| 摘要 |
The particle collection efficiency of a fibrous filter (11) is significantly increased by imposing a high voltage potential on electrodes (15, 16) placed on either side of the filter (17). This creates a strong electrostatic field across the filter (17) which enhances the fiber's particle collection ability. The electrostatic field strength, and particle collection efficiency, increase with the voltage employed to establish the electrostatic field. An insulated electrode (15) as the front electrode (15) in combination with a conductive electrode (16) as the rear electrode (16) enables a very high electrical potential to be imposed on the electrodes (15, 16) without resulting arcing between the electrodes (15, 16). Pre-charging of dust particulates with the same polarity as the insulated electrode further increases collection efficiency without resulting in a charge buildup in front of the electrodes (15, 16) or a blocking of airflow by particles collecting on the electrodes (15, 16).
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