การออกแบบและประเมินตัวตกตะกอนเชิงไฟฟ้าสถิตแบบหลายท่อสำหรับดักฝ่นละออง ขนาดเล็กจากโรงบ่มใบยาสูบ

In this paper, a multiple-tube electrostatic collector for removal of particulate matter from the tobacco monopoly exhaust was designed and theoretically and experimentally evaluated. The designed collector consisted of a simple array of coaxial discharge electrodes placed along the axis of six cylindrical collection tubes with a diameter of 50.8 mm and 613.6 mm in length; the discharging electrode with diameters of 1.1 mm and the insulator was used to electrical insulate between electrodes and cylindrical collection. The diameter of the insulator was 80 mm and 88.9 mm in height. In this study, a 30 kV DC power supply was used to apply DC high voltage to the discharging electrode in the range of about 0 to 30 kV, while the collection electrode was grounded. The current-voltage characteristics of the multiple-tube electrostatic collector were analytically calculated. It was shown that the discharged current increased with increasing applied corona voltage, in the range between 26 and 332 μA. In order to study the collection efficiency of the collector, the particulate mass concentration at inlet and outlet of the precipitator was sampled by the isokinetic sampling at the particulate flow rate of about 10 L/min and the operating pressure of about 1 bar for 15 min per sample. The overall collection efficiency of the present precipitator was found to be about 75 %. Finally, the designed electrostatic precipitator appeared to be a promising apparatus for collection of particulate matter from tobacco monopoly exhaust. [ABSTRACT FROM AUTHOR]