Korean Filtration and Separation Society (KFS)
Korean Filtration and Separation Society (KFS)

Speaker
Prof. Daren Chen

Floyd D. Gottwald Sr. Endowed Chair Professor in Mechanical and Nuclear Engineering, Virginia Commonwealth University.
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Title: Study on the Reverse Pulsed-flow Cleaning for Pleated Cone Filter Cartridges
Abstract:
Pleated filter cartridges with an additional pleated filter cone installed on the cartridge base, i.e., pleated cone filter cartridges, have been recently introduced to increase the filtration area and to improve the medium regeneration by the reverse pulsed-jet cleaning. In this study, a dust collector equipped with a pleated cone filter cartridge was set up to investigate the performance improvement of the pulsed-jet cleaning for pleated cone filter cartridges by using a diffusion nozzle (compared to that by a round nozzle typically applied). Effects of the tank pressure (TP), jet distance (JD) and inner cone height (HC) to the distribution of static pressure acting on the inner surfaces of cone filter cartridges were investigated. It is found that, using a diffusion nozzle, the pulsed-jet pressure at the upper portion of filter cartridges was increased, particularly for cartridges having a low HC and tested at a short JD setting. The pulsed-jet cleaning of a pleated cone filter cartridge by a diffusion nozzle could decrease the residual filtration pressure drop, prolong the cleaning interval, and reduce the average dust emission of cone filter cartridges.

Short Bio:
He is now Floyd D. Gottwald Sr. Endowed Chair Professor in Mechanical and Nuclear Engineering, Virginia Commonwealth University. He is also Chang jiang chaired professor, School of Environment, Tsinghua University. He received his PhD. from Particle Technology Laboratory, University of Minnesota (1997). He is the principal investigator and inventor of electrospray monodisperse particle generator, nanometer differential mobility analyzer (NanoDMA), high-through nanoparticle charger, personal particle monitors, continuous gene transfector and many other particle tools. He has published more than 170 peer-viewed journal papers and 36 conference papers. He holds 33 US and 4 international patents in the area of particle technology. He receives AAAR Sheldon K. Friedlander Award (1997), Gaef Smoluchowski Award (2002), AAAR Kenneth Whitby award (2005) and AAAR Benjamin Liu Award (2012) for his significant contribution in nanoparticle instrumentation and experimental techniques. He has intensive experience on air pollution control, particle sampling and characterization, particle instrumentation, filtration and separation, health effect of particles, and particle synthesis/generation for environmental, energy, pharmaceutical and biomedical applications.

Speaker
Dr. Alain Ginestet

PhD in Chemical Engineering
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Title: Design improvement of an injection pipe and its validation on the performances of a semi-industrial pulse-jet baghouse
Abstract:
The purpose of this study is to improve the operation of a pulse-jet baghouse by the modification of the design of its compressed air injection pipe. The base injection pipe has all the nozzles of constant diameter (9.7 mm). To characterize the injection pipe, experimental measurements and three dimensional CFD simulations were carried out. The impact of the geometry of the injection pipe on the behavior of an instrumented filter bag moved under the nozzles has been assessed from experimental measurements. Once the design of a new injection pipe has been defined by three dimensional CFD simulation and assessed by measurements, the performances of a semi-industrial pulse-jet baghouse has been measured with both the base and the modified injection pipes. The main conclusion of our study is that in order to ensure that cleaning of filter bags belonging to the same injection pipe is more homogeneous, it is not enough to assess the injection pipe (by measurements and/or calculation) but it is also necessary to characterize the behavior of a filter bag moved under and along the nozzles of the injection pipe. The results of our study show that a new injection pipe geometry with decreasing nozzle diameter (from 10.5 mm at the inlet to 8.0 mm at the bottom of the pipe) allows a more uniform behavior of the instrumented filter bag moved under and along the pipe. This better uniformity is characterized by both the average peak pressure and the average root mean square acceleration averaged along the height of the filter bag. Finally, when operated with the modified injection pipes, the semi-industrial pulse-jet baghouse shows better performances characterized by lower residual pressure drop after cleaning (-7%), longer filtration cycles (+70%) and lower particle emissions (-5% for PM1, -15% for PM2.5 and -18% for PM10).

Short Bio:
PhD in Chemical Engineering obtained in 1992 at the Technical University of Compiègne in France.

Project Manager at CETIAT since 1993:
Studies for customers in the fields of air filtration, air and gas cleaning, ventilation, indoor air quality (IAQ), dust removal in industrial applications
Training
Involved in the standardization activity (member of ISO/TC 142, CEN/TC 195 and IEC TC59/SC 59N)
Survey (state of the art)
Relation with trade union (national and European organization)

Publications in scientific journals and communications in conferences
Process Safety and Environmental Protection, 165 (2022)
Process Safety and Environmental Protection, 147 (2021)
Energy and Built Environment, 2 (2021)
World Filtration Congress 2022, San Diego, USA
Indoor Air 2022, Kuopio, Finland

Speaker
Manfred Sauer-Kunze

Global Product Manager Clean Process & Containment
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Title: Newly published ISO 10121-3, testing and classification of gas phase air cleaning devices
Abstract:
. ISO 10121-3 – First classification system for molecular comfort filters . Big step for marketing molecular filtration . Shows clearly the efficiency and capacity of a specific molecular filter vLD 30, LD 60, MD 70, HD 80 . Easier selection of the right molecular filter for a specific comfort application . Allows comparison over different filter models & brands . Allows clear molecular filter specifications for consultants . Publication: ISO – October 2022 / EN ISO – Q4 2022 . National Standard in EU countries: Q1/Q2 2023

Short Bio:
. Since 2021 with Camfil responsible as Global Product Manager Clean Process & Containment . Since 1990 in ventilation and air filtration industry in different roles like: Lab / R&D-manager, Application Engineer, Product Manager, Sales Manager, Managing Director . Chemical Engineer, Dipl. Ing. TU Karlsruhe, Germany . Experienced in General Ventilation, Clean Rooms, Containment, Turbomachinery Air Intake, Air Pollution Control, Oil- and Emulsions mist separation, Molecular filtration, Biological particle filtration, Product Design and Testing . Actively working in most of the WGs of CEN TC195 and ISO TC 142 . Convenor of German mirror committee to both TC’s . VDI, EUROVENT, REHVA, VDMA

Speaker
Martin Klein

Vice President
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Title: Filtration products for new energy vehicles
Abstract:
In his presentation he will outline what drives innovation at MANN+HUMMEL, focusing on the transformation of the automotive industry and Filtration Products for New Energy Vehicles.

Short Bio:
He studied Process Engineering at the Karlsruhe University (TH) and since May 2020 has been Global Vice President Engineering Filter Elements at MANN+HUMMEL. He started his career at MANN+HUMMEL in 2003 as a development engineer for diesel fuel filter media and elements for automotive OEMs and Aftermarket. In 2010, after projects at the Indian location in Tumkur he moved to the department Innovation and Cooperate Strategy. In 2017 he took over the role as Vice President Product Champion and Engineering Cabin Air Filters in Himmelkron, Germany, being responsible for the national and international development teams and the product strategy for cabin air filters.

Speaker
Professor Eunkyoung Shim

North Carolina State University
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Title: Fabrication of PLA filter media via meltblowing process and their filtration performance
Abstract:
Meltblowing technology is one of the most economical ways to produce fine fiber webs, and electrically charged meltblown filter media are widely used in various filtration operations, such as HVAC filters, cabin air filter, face mask/respirator, clean room/operation room filters. Currently, polypropylene (PP) is the most preferred material for meltblown media because of its ease of processing, low cost, and good electret properties. However, the production, use, and disposal of PP filter media, like any other petroleum-based materials, may cause harmful environmental impacts such as non-degradability, non-renewability, emissions of greenhouse gases, and the diminishment of petroleum resources. As more and more evidence of disruption in the ecological system caused by plastic pollutants in the forms of microplastic particles is being emerged, we need alternative solutions/materials to produce clean air.
To address concerns over environmental burden and sustainability associated with conventional PP filter media, we have studied processability, structure, and filtration performance of Polylactic acid (PLA). Polylactic Acid (PLA) is linear thermoplastic aliphatic polyester derived from 100% renewable resources such as starch and sugar, which are biodegradable, recyclable, and compostable. PLA is considered as the most promising alternative due to its relatively good mechanical properties and compatibility to current nonwoven processing technologies. Also, the recent advancement of PLA polymer engineering leads to a wide array of commercial PLA resins with various molecular structure at an affordable cost. However, substituting PLA with conventional plastic polymers such as PP as a meltblown fabric faces some difficulties.
Meltblown process is designed to use only low-viscosity polymer due to its die design, and polymer with high viscosity cannot be processed. High viscosity also inhibits the attenuation of polymer strands and lead to large fiber diameter, which is not suitable in most meltblown application. Besides differences in physical properties, the rheological properties of PLA is not fully adapted for the meltblowing process as and possess larger fiber size distribution and therefore lower solidity and larger pore size distribution. The recent development of PLA polymer engineering yields PLA with more extensive ranges of molecular architects, including wide ranges of molecular weight and crystallization behaviors. This provides opportunities to overcome rheological restrictions in using PLA polymer in the meltblown process. But there is little study on the processability of PLA in meltblown technology and the effect of material and processing parameters on media structures and filtration performance.To adapt PLA for the meltblown filter media production, it is necessary to establish how PLA polymer properties affect the meltblown process, media structure and filtration performance. Here, we present the fabrication of PLA filter media in an industrially relevant setting by utilizing a commercially available low molecular weight PLA resin and a Reicofil meltblowing production line with traditional Exxon die system (most commonly used meltblown production equipment). Effects of process parameters on PLA meltblown media structures and air filtration performance were evaluated and compared with those of PP meltblown media.

Short Bio:
She is an associate professor in the department of Textile Engineering, Chemistry and Science at North Carolina State University. This appointment followed 15 years of experience in the Nonwovens Institute as a research assistant professor and research associate. She received Ph.D. in Fiber and Polymer Science from North Carolina State University in 2001.Her research areas includes nonwoven filtration media, charging technology, fiber spinning, nonwoven and fiber structure analysis, nonwoven process mechanism, fiber modifications with additives and fiber/nonwoven product developments.
She has led more than 25+ projects as a PI in the field of fiber and polymer science, nonwoven manufacturing, functionalization of fibers and nonwovens, characterization of fibrous material, and filter media engineering. She has published 5 book chapters, 40+ peer-reviewed publications. Shim had co-chaired 22 PhDs, who work in industry and academia. She has developed and taught graduate courses and workshops and short courses, including materials, polymer, and fibers, nonwoven processing & products, filtration, nonwoven characterization.

Speaker
Dr. Kyung-Ju Choi

Chair of KFS, Former Chair of AFS, CTO of Clean & Science Co.
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Title: Electret filter media manufacturing methods
Abstract:
There are three basic charging principles. They are 1) charging by friction (rubbing of one on another resulting in electrons moving from one surface to another), 2) charging by conduction (touching of a charged one to a conductive material), 3) charging by induction (charged one is held near a neutrally charged material that is grounded, charge flows between two objects and the uncharged material develop a charge with opposite polarity).
Electret filter media have been commercially produced by hydro-charging, corona-charging, and tribo-charging techniques. Piezo-charging is the most recent techniques to make the electret filter media. These techniques will be discussed in detail and compared.

Short Bio:
Education:
M.S. in Polymer Engineering at the University of Tennessee, Knoxville, USA, 1977 – 1980

Ph.D. In Polymer Engineering at the University of Tennessee, Knoxville, USA, 1980 – 1983

Employment:
Research Associate at the University of Tennessee, Knoxville, USA, 1983 – 1986

Sr. Staff Scientist at Cummins Diesel Engine Co., Developing Lube/Fuel/Air/Hydraulic Filters, 1986 ~ 1995

Adjunct Professor at Tennessee Tech. University Teaching/Directing ChE Graduate Students, 1987 ~ 1996

Director of Global Filter Media Development, AAF(AmericanAirFilter) Intl., 1995 ~ 2009

Adjunct Professor at University of Louisville, Teaching/Directing ChE Graduate Students, 1996 ~ 2012

CTO, Clean & Science, Co., Technical Training and Guidance, 2012~present

Professional Activities:

Chair of the American Filtration and Separations Society, 2010 – 2011

Chair of the Korean Filtration and Separation Society, 2017 – present

Program subcommittee chair of ASHRAE TC 2.3 and TC 5.4, 2016 – present

ISO/TC 142 Delegate, 2012 – present

FILTECH Scientific Committee, 2016 - present

Chair of ASHRAE RP-1360

Speaker
TBD

TBD
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Title: TBD
Abstract:
TBD
TBD

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