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KMID : 1024520180270060349
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Journal of the Environmental Sciences
2018 Volume.27 No. 6 p.349 ~ p.358
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Prediction of Pulse Pressure and Pulse Interval of Change in Operation Conditions of a Pulse Air Jet Bag Filter
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Lee Deok-Gi
Lim Woo-Taik
Cho Jae-Hwan
Choi Kum-Chan
Shin Hyun-Moo
Jang Seong-Ho
Suh Jeong-Min
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Abstract
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In this study, using coke dust from ironwork, the pulse pressure on a pulse air jet bag filter was investigated considering the influence of the pressure loss due to filtration velocity and pressure intervals. The research on the optimal pulse pressure prediction of a pulse air jet type bag filter using coke dust showed the following results. Pressure loss volatility produced by the pulse pressure under low dust concentration(0.5, 1 g/m3) and low face velocity(1.25 m/min) was less than 10 mmH2O. This suggests that the pulse pressure has a low impact on the pressure loss. In contrast, pressure loss volatility under high dust concentration(3 g/m3) and high face velocity(1.75 m/min) was 25 mmH2O. Therefore, pulse pressure with high dust concentration and high face velocity has a strong influence on the pressure loss volatility, compared to the condition of low dust concentration and low face velocity. The optimal pulse pressure of inlet dust concentration(0.5 g/m3) was 6 kg/cm2 under the same face velocity(1.75 m/min). As concentration increased from 1 to 2 g/m3, the pulse pressure gradually reached 5 kg/cm2 thus indicating that the pulse pressure(5 kg/cm2) is pertinent at a high concentration(3 g/m3). The pulse intervals: 20, 25 and 30 sec, which are relatively longer than 10 and 15 sec, corresponded to high pressure loss volatility produced by the pulse pressure. Furthermore, low pressure loss volatility was noted at 5 kg/cm2 of the overall pulse pressure.
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KEYWORD
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Bag filter, Pulse air jet, Coke dust, Pulse pressure, Pressure loss
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