Optimization of Air Distribution in a Baghouse Filter Using Computational Fluid Dynamics
Baghouse filters are used to reduce the emission of pollutants in the atmosphere. With the stricter environmental regulations and the need to avoid the emission of pollutants into the atmosphere, the demand for better results in terms of collection efficiency and filtration rises. A good performance of a baghouse filter is closely linked to the correct flow distribution inside it, whether in the hopper or in the bags. Other important variables for good performance are internal speed, filtration rate (RAP), pressure drop, cleaning efficiency, etc. The upgrading of existing bag filters to current standards is a major challenge for the industry, generally due to, among other factors, emission regulations and common physical and dimensional constraints of the existing equipment. Computational Fluid Dynamics analysis (CFD) can help deal with this problem because it makes possible to perform several analyzes at a lower cost and with great result accuracy when compared with the traditional approaches. In this work, the analysis of an existing bag filter, which presents serious problems of premature discharging of components due to nonuniformity in the internal distribution of the flow, is performed. This analysis has several steps, among them, documentation survey, field survey, flow and pressure drop measurements (pressure differential between the clean side and the dirty side of the filter) with the aid of CFD, with the objective to raise pressure and velocity and to identify possible dimensional changes to improve flow uniformity.
Keywords:baghouse filter, flow distribution, flow uniformization, computational fluid dynamics (CFD), internal flow
CONAMA Resolution No 3, June 28, 1990, available at: http://www.braziliannr.com/brazilian-environmental-legislation/conama-resolution-3-90/
World Health Organization, Air Quality Guidelines for Particulate Matter, Ozone, Nitrogen Dioxide and Sulfur Dioxide: Global Update 2005, WHO, 2006
United States Environmental Protection Agency, Particulate Matter, available at: http://www.epa.gov/airquality/particlepollution/index.html
D. Vallero, Fundamentals of Air Pollution Control, Elsevier, 2008 DOI: https://doi.org/10.1016/B978-012373615-4/50010-8
R. B. Damian, “Desenvolvimento de um sistema de filtragem compacto para usinas de asfalto”, 10th Brazilian Congress of Thermal Sciences and Engineering, Rio de Janeiro, Brazil, November 29-December 3, 2004
E. R. Tognetti, Influencia das Condicoes Operacionais na Formacao e Remocao de Tortas de Filtracao de Gases, MSc Thesis, Federal University of Sao Carlos, 2007 (in Prortugese)
C. R. Maliska, Transferencia de Calor e Mecanica dos Fluidos Computacional, LTC, 2004 (in Prortugese)
How to Cite
MetricsAbstract Views: 689
PDF Downloads: 601
Authors who publish with this journal agree to the following terms:
- Authors retain the copyright and grant the journal the right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) after its publication in ETASR with an acknowledgement of its initial publication in this journal.