충격기류식 여과집진기의 내부 유동 시뮬레이션 해석을 통한 압력손실 예측 = Prediction of Pressure Drop Using the Internal Flow Simulation of Pulse Air Jet Bag Filters

다국어 초록 (Multilingual Abstract)

With continuous industrial development, the types, and amount of particulate matter (PM) have been increasing. Since 2018, environmental standards regarding PM have become more stringent. Pulse air jet bag filters are suitable for PM under the 20 ㎛ and, can function regardless of size, concentration and type. Filtration velocity and shape are important factors in the operation and design of the pulse air jet bag filters however, few established studies support this theory. In this research, numerical simulations were conducted based on experimental values and, several methods were employed for minimizing the pressure drop. In the pilot system, as the inlet duct velocity was faster than 19 m/sec, flow was not distributed equally and, re-entrainment occurred due to the hopper directional vortex. The multi-inlet system decelerated the hopper directional vortex by 25 ~ 30%, thereby decreasing total pressure drop by 6.6 ~ 14.7%. The guide vane system blocked the hopper directional vortex, which resulted optimal vane angle of 53°. The total pressure of the guide vane system increased by 0.5 ~ 3% at 1.5 m/min conditions. However, the filtration pressure drop decreased by 4.8 ~ 12.3% in all conditions, thereby reducing the operating cost of filter bags.

참고문헌 (Reference)

1 류재용, "충격기류식 여과집진장치에서 운전조건 변화로 인한 여과저항에 관한 연구[Ⅰ]" 한국환경과학회 16 (16): 449-458, 2007

2 서정민, "충격기류식 여과집진기에서 경험모델을 이용한 최소압력손실의 분사거리 예측" 한국환경과학회 20 (20): 25-34, 2011

3 서정민, "경험모델을 이용한 충격기류식 여과집진기의 적정 탈진압력 예측" 한국환경과학회 21 (21): 613-622, 2012

4 Sahin, B., "The use of perforated plates to control the flow emerging from wide-angle diffuser, with application to electrostatic precipitator design" 8 (8): 124-131, 1987

5 Vladimir, B., "The treatment of waste gas from fertilizer – an industiral case study of long term removing particulate matter with a pilot unit" 297 (297): 374-383, 2016

6 Rui, Z., "Simulation studies on protector of pulse-jet cleaning filter bag" 16 (16): 426-431, 2012

7 Burton, C. L., "Precipitator gas flow distribution" 25 (25): 139-143, 1975

8 Mahesh, J., "Parametric study and analysis of air filter" 5 (5): 1-9, 2019

9 Li, M. L., "Numerical study of pleated fabric cartridges during pulse-jet cleaning" 198 (198): 75-81, 2010

10 Jan, S., "Numerical simulation of large fabric filter" EDP Sciences 1-5, 2012

11 Anderson, B. O., "Numerical and experimental study of pulse-jet cleaning in fabric filters" 291 (291): 284-298, 2016

12 "Ministry of Environment"

13 Zhiqiang, Z., "Evaluation of various turbulence models in predicting airflow and turbulence in enclosed environments by CFD : Part 1-summary of prevalent turbulence models" 13 (13): 853-870, 2007

14 Liu, D. H. F., "Environmental Engineers'Handbook : Air pollution" Lewis Publishers (CRC Press) 344-349, 1997

15 Gabites, J. R., "Design of baghouses for fines collection in milk powder plants" 187 (187): 46-52, 2008

16 Xavier, S., "Consequences of high transitory airflows generated by segmented pulse-jet cleaning of dust collector filter bags" 201 (201): 27-48, 2010

17 Federico, S., "CFD model validation of a bag filter for air filtration in a milling plant" 1-10, 2017

18 ANSYS Inc, "ANSYS Fluent Technical guide –Governing equations"

19 ANSYS Inc, "ANSYS Fluent Technical guide – Porous media conditions"