scholarly journals Study on the Filtration Performance of the Baghouse Filters for Ultra-Low Emission as a Function of Filter Pore Size and Fiber Diameter

2019 ◽  
Vol 16 (2) ◽  
pp. 247 ◽  
Author(s):  
Xingcheng Liu ◽  
Henggen Shen ◽  
Xueli Nie
Keyword(s):  
Pore Size ◽  
Fiber Diameter ◽  
Filtration Efficiency ◽  
Filter Media ◽  
Filtration Resistance ◽  
Filtration Performance ◽  
Fabric Structure ◽  
Dynamic Filtration ◽  
Depth Filtration ◽  
Surface Filtration

The main objective of this study was to determine the effect of filter pore size and fiber diameter on the performance of the baghouse filters for ultra-low emission. In this study, three kinds of conventional polyester filter (depth filtration media) and two kinds of polytetrafluoroethylene membrane-coated polyester filter (surface filtration media), having various filter pore sizes and fiber diameters, were tested to determine the performance of static and dynamic filtration. In order to determine the static filtration performance, the filtration resistance and the filtration efficiency of the clean filter media were measured by the arrestance method. The dynamic filtration performance experiments were conducted to determine the dynamic resistances, dust depositions, and dynamic filtration efficiencies of the dust-containing filter media under the condition of dust airflow filtration through a pulse-cleaning cycle. In the dynamic filtration performance experiments, the size of 50% test dust was less than 2.5 μm, and the mass mean aerodynamic diameter of the dust was 1.5 μm. The filtration velocity was 2 m∙min−1, and the dust concentration was 18.4 g∙m−3. The static filtration performance experiments showed that the filter pore size greatly affected the filtration resistance and the filtration efficiency of the fabric structure of the surface filtration media. In the depth filtration media, the filtration efficiency and the filtration resistance of the fabric structure were improved when the filter pore size and the fiber diameter were smaller in magnitude. For all the five filter media, smaller the pore size of the filter media, greater was the filtration precision (for fine particles, such as PM2.5) of the fabric structure. In the dynamic filtration performance experiments, the filter pore size and the fiber diameter of the depth filtration media affected the dynamic filtration resistance and the dynamic filtration efficiency of the depth filtration media by affecting the deposition rate of dust in the depth filtration media; however, the filter pore size of the surface filtration media affected the blocking rate of dust in the membrane micropores, thus influencing the dynamic filtration resistance and the dynamic filtration efficiency of the surface filtration media.

scholarly journals Effect of Temperature on the Structure and Filtration Performance of Polypropylene Melt-Blown Nonwovens

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Si Cheng ◽  
Alam S. M. Muhaiminul ◽  
Zhonghua Yue ◽  
Yan Wang ◽  
Yuanxiang Xiao ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Pore Size ◽  
Fiber Diameter ◽  
Temperature Treatment ◽  
Filtration Efficiency ◽  
Effect Of Temperature ◽  
Filtration Performance ◽  
Different Temperatures ◽  
Polypropylene Melt ◽  
Filtration Properties

AbstractBy applying the simultaneous corona-temperature treatment, the effect of electret temperature on the structure and filtration properties of melt-blown nonwovens was investigated. Fiber diameter, pore size, thickness, areal weight, porosity, crystallinity, filtration efficiency, and pressure drop were evaluated. The results demonstrated that some changes occurred in the structure of electret fabrics after treatment under different temperatures. In the range of 20°C~105°C, the filtration efficiency of melt-blown nonwovens has a relationship with the change in crystallinity, and the pressure drop increased because of the change in areal weight and porosity. This work may provide a reference for further improving filtration efficiency of melt-blown nonwovens.

Preparation and filtration performance of the circular weft-knitted seamless weft-insertion fabric materials

2019 ◽  
pp. 152808371985532 ◽  
Author(s):  
Fei Tian ◽  
Gaoming Jiang ◽  
Zhe Gao
Keyword(s):  
Pore Size ◽  
Production Efficiency ◽  
Filtration Efficiency ◽  
High Porosity ◽  
Filtration Performance ◽  
Air Particulate ◽  
Forming Technology ◽  
New Type ◽  
High Production ◽  
Fabric Materials

Air particulate matter pollution has become a severe environment concern calling for filtration materials with great filtration performance. As the development of seamless forming technology, knitted filtration materials gradually show great potential. This study aimed to develop a novel kind of knitted seamless structure for filtration materials of filter bags with high production efficiency and excellent filtration performance. A new type of the circular weft-knitted seamless weft-insertion fabric (CKSW) filtration materials were developed on the modified circular knitting machine. This CKSW filtration materials consisting of the ground yarns, connection yarns and weft-insertion yarns, polyester full drawn yarns, and polyester draw texturing yarns with different yarn configurations were employed to realize series of CKSW samples. The polytetrafluoroethylene filaments with tourmaline particles were used to verify whether the static electric material produced an adsorption filtration effect on the CKSW filtration materials or not. After pretreatment, the filtration performance of the CKSW filtration materials was evaluated by analyzing its pore size, porosity, and filtration efficiency. Ultimately, the CKSW filtration materials with ground yarns and weft insertion yarns of draw texturing yarn and the connection yarns of full drawn yarn exhibited the most excellent filtration performance. The CKSW filtration materials show a high porosity of 87.14%, the pore size of 67.55 µm, and good filtration efficiency of 91.57% with the particles size of ≥ 5.0 µm. The successful fabrication of such knitted filtration materials may provide ideas for the development of filtration materials with new architecture mainly used as filter bags for baghouse.

Study on the Property Dynamic Filtration Performance of Anthranilic Acid Copper in Environment Engineering

2013 ◽  
Vol 340 ◽  
pp. 903-907
Author(s):  
Xiao Jing Wang ◽  
Fan Wang ◽  
Ji Jin
Keyword(s):  
Anthranilic Acid ◽  
Industrial Applications ◽  
Filter Press ◽  
Operating Conditions ◽  
Filtration Resistance ◽  
Filtration Performance ◽  
Dynamic Filtration ◽  
Efficient Regeneration ◽  
Saccharin Sodium ◽  
Filtration Experiment

Based on the filtration experiment of a rotary filter press equipped with the filtration fabric, this paper presents a study on the dynamic filtration performance and the filtration resistance of anthranilic acid copper during the production of saccharin sodium. The best possible operating condition is expected by examining the influence on the filtration rate and its attenuation in different operating conditions, which can provide guidance for future industrial applications, and an efficient regeneration method is proposed.

Submicron aerosol filtration performance of centrifugally spun nanofibrous polyvinylpyrrolidone media

2019 ◽  
pp. 152808371986504
Author(s):  
Gungor Melike ◽  
Mehmet D Calisir ◽  
Yasin Akgul ◽  
Sule Selcuk ◽  
Demir Ali ◽  
...  
Keyword(s):  
Produced Water ◽  
Fiber Diameter ◽  
Cross Linking ◽  
Average Fiber Diameter ◽  
Filter Media ◽  
Air Filter ◽  
Filter Efficiency ◽  
Filter Performance ◽  
Filtration Performance ◽  
Centrifugal Spinning

In this study, polyvinylpyrrolidone-based nanofibrous air filter media were produced via centrifugal spinning and subsequently stabilized by thermal cross-linking process. Samples were produced using solutions with three different polymer concentrations (5, 10 and 20 wt.%) and three different rotational speeds (4000, 6000 and 8000 r/min). After obtaining the optimum web structure with the lowest average fiber diameter and the most uniform distribution, the webs were later thermally cross-linked in order to stabilize polyvinylpyrrolidone against the degradative effects of water. In addition, the webs were subjected to dissolvability tests to see the efficacy of cross-linking treatment. Morphological, structural and chemical characterizations of the polyvinylpyrrolidone webs were performed by SEM, XRD and FTIR, respectively. Finally, filter efficiency and pressure drop were measured to assess filter performance. The results have shown that the lowest average fiber diameter is obtained at the highest rotational speeds. Subsequent thermal cross-linking treatment has been found to prevent fibers from dissolving in water. The produced water-resistant, environmentally friendly polyvinylpyrrolidone nanofibrous filter media has had a satisfactory filtration performance with a high filter efficiency of 99.995% and a high quality factor of 0.39 mm H2O−1.

scholarly journals Effect of electrospinning parameters on the air filtration performance using electrospun polyamide-6 nanofibers

2017 ◽  
Vol 23 (4) ◽  
pp. 441-446 ◽  
Author(s):  
Majid Aliabadi
Keyword(s):  
Applied Voltage ◽  
Fiber Diameter ◽  
Polyamide 6 ◽  
Solution Concentration ◽  
Filtration Efficiency ◽  
Sem Analysis ◽  
Optimal Parameters ◽  
Air Filtration ◽  
Sem Image ◽  
Filtration Performance

Due to their high filtration efficiency and low basis weight nanofibrous filters are suitable for filtration applications. The objective of this study was to investigate the effect of electrospinning parameters including polymer solution concentration (10-15 wt.%), applied voltage (15-25 kV) and tip-collector distance (7.5-12.5 cm) on the filtration efficiency of polyamide (PA) nanofibers. The morphology of the PA nanofibers was characterized using scanning electron microscope (SEM) analysis. The SEM image results indicated that the average fiber diameter of PA nanofibers was 220 nm at PA solution concentration of 12.5 wt.%, applied voltage of 20 kV, tip-collector distance of 10 cm, flow rate of 0.5 mL h-1, temperature of 25 ?C and humidity of 40%. The obtained results showed that the highest quality factor and efficiency of 7.02?10-2 Pa-1 and 96% were optimal parameters for nanofibrous filters during 30 and 240 min of electrospinning time, respectively. The presented study showed that the morphology optimization of nanofibers is an effective method for improvement of filtration performance.

scholarly journals Influence of fiber diameter on filtration performance of polyester fibers

2019 ◽  
Vol 23 (4) ◽  
pp. 2291-2296 ◽  
Author(s):  
Xin Zhang ◽  
Yue-Sheng Fan ◽  
Guo-Ji Tian ◽  
Huan Wang ◽  
Hong-Li Zhang ◽  
...  
Keyword(s):  
Influencing Factors ◽  
Fiber Diameter ◽  
Counting Efficiency ◽  
Filtration Efficiency ◽  
Filtration Velocity ◽  
Filtration Performance ◽  
Filter Materials ◽  
Significant Difference ◽  
Polyester Fibers

The filtration performance of four kinds of coarse polyester filters commonly used in the market was studied experimentally. The results showed that these filter materials had better filtration efficiency for particles larger than 5 ?m. There was a significant difference among the same grade filters on filtration efficiency and resistance. The maximum counting efficiency of all four Samples can be achieved when the filtration velocity was 1.1 m/s. Fiber diameter was one of the main influencing factors that affect the efficiency and resistance of polyester filters. The comprehensive effect was relatively good when the Sample fiber diameter was small.

Degradation Processes in Corona-Charged Electret Filter-Media with Exposure to Ethyl Benzene

2007 ◽  
Vol 2 (4) ◽  
pp. 155892500700200 ◽  
Author(s):  
J. Jasper Warren ◽  
Anushree Mohan ◽  
Juan Hinestroza ◽  
Roger Barker
Keyword(s):  
Direct Contact ◽  
Polypropylene Fiber ◽  
Filtration Efficiency ◽  
Benzene Vapor ◽  
Ethyl Benzene ◽  
Filter Media ◽  
Fiber Mats ◽  
Filtration Performance ◽  
Custom Made ◽  
Electret Filter

The degradation of filtration performance for corona-charged electret filter media exposed to ethyl benzene was assessed. Nonwoven corona-charged polypropylene fiber mats were exposed to ethyl-benzene using a custom made apparatus. Evaluated scenarios included ethyl-benzene vapor and liquid exposures. The filtration performance was evaluated using DOP as a test aerosol to measure filtration performance. It was observed that significant filtration degradation occurred only when liquid ethyl benzene came into direct contact with the filter media. No significant changes in the pressure drop or filtration efficiency was observed for any of the exposure scenarios in which the fibers were only exposed to ethyl benzene in the vapor phase.

scholarly journals Filtration efficiency improvement of air filter paper for fine particles by electrospinning technology

BioResources ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. 5220-5233
Author(s):  
Weiyin Su ◽  
Lanfeng Hui ◽  
Xiaoyan Ma ◽  
Qian Yang ◽  
Wanhong Sun
Keyword(s):  
Pore Size ◽  
Filter Paper ◽  
Fine Particles ◽  
Filtration Efficiency ◽  
Research Progress ◽  
High Porosity ◽  
Air Filter ◽  
Filtration Performance ◽  
Initial Resistance ◽  
Good Filtration

Due to great advantages, such as simple operation, high porosity, and good fiber continuity, the working principle and research progress of electrospinning technology was studied and polyvinyl alcohol (PVOH) nanofibers were prepared via this process. Air filter paper was used as the receiving substrate to prepare electrospun nano air filter paper (NAFP). The PVOH concentration, static voltage, and receiving distance, were tested to explore the influence of spinning parameters on the filtration performance. Further, the microfiber morphology of the electrospun NAFP was observed. The performance of filter paper, including air permeability, pore size, initial resistance, filtration efficiency, and dust retention, were tested. The results showed that the electrospun NAFP had better filtration performance compared to the air filter paper, and simultaneously they had lower initial resistance and higher precision filtration efficiency. The nanofiber influenced the surface of the air filter paper, as it sharply reduced the pore size. When the spinning condition was 10%, 21 kV, and 15 cm, the pore size decreased approximately 0.6 times of the original, which meant the electrospun NAFP could capture particles ≥ 0.2 μm in size. Finally, after three repeated uses, the good filtration performance was maintained.

Performance of Electrospun Polyvinylidene Fluoride Nanofibrous Membrane in Air Filtration

2020 ◽  
Vol 20 (4) ◽  
pp. 552-559
Author(s):  
Yuanxiang Xiao ◽  
Enlong Wen ◽  
Nazmus Sakib ◽  
Zhonghua Yue ◽  
Yan Wang ◽  
...  
Keyword(s):  
Pore Size ◽  
Polyvinylidene Fluoride ◽  
Fiber Diameter ◽  
Structural Parameters ◽  
Solution Concentration ◽  
Air Permeability ◽  
Filtration Efficiency ◽  
Experimental Results ◽  
Fibrous Membrane ◽  
Predicted Values

AbstractPolyvinylidene fluoride (PVDF) fibrous membranes with fiber diameter from nanoscale to microscale were prepared by electrospinning. The structural parameters of PVDF fibrous membrane in terms of fiber diameter, pore size and its distribution, porosity or packing density, thickness, and areal weight were tested. The relationship between solution concentration and structural parameters of fibrous membrane was analyzed. The filtration performance of PVDF fibrous membrane in terms of air permeability and filtration efficiency was evaluated. The results demonstrated that the higher solution concentration led to a larger fiber diameter and higher areal weight of fibrous membrane. However, no regular change was found in thickness, porosity, or pore size of fibrous membrane under different solution concentrations. The air permeability and filtration efficiency of fibrous membrane had positive correlations with pore size. The experimental results of filtration efficiency were compared with the predicted values from current theoretical models based on single fiber filtration efficiency. However, the predicted values did not have a good agreement with experimental results since the fiber diameter was in nanoscale and the ratio of particle size to fiber diameter was much larger than the value that the theoretical model requires.

Study on the Relationship Between Structure Parameters and Filtration Performance of Polypropylene Meltblown Nonwovens

2020 ◽  
Vol 20 (4) ◽  
pp. 366-371 ◽  
Author(s):  
Yuanxiang Xiao ◽  
Nazmus Sakib ◽  
Zhonghua Yue ◽  
Yan Wang ◽  
Si Cheng ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Pore Size ◽  
Pore Diameter ◽  
Fiber Diameter ◽  
Areal Density ◽  
Nonwoven Fabric ◽  
Filtration Efficiency ◽  
Structure Parameters ◽  
Nonwoven Fabrics ◽  
Wide Range

AbstractIn this study, polypropylene meltblown nonwoven fabrics with different structure parameters such as fiber diameter, pore size, and areal density were prepared by the industrial production line. The morphology of meltblown nonwoven fibers was evaluated by using scanning electron microscope, and the diameter of fibers was analyzed by using image-pro plus software from at least 200 measurements. The pore size of nonwoven fabric was characterized by a CFP-1500AE type pore size analyzer. The filtration efficiency and pressure drop were evaluated by TSI8130 automatic filter. The results showed that the pressure drop of nonwoven fabrics decreased with the increase in pore size; the filtration efficiency and the pressure drop had a positive correlation with the areal density. However, when the areal density is in the range of 27–29 g/m2, both filtration efficiency and pressure drop decreased with the increase of areal density; when the areal density was kept constant, the filtration efficiency decreased as the pore size decreased; when the pore size of the meltblown nonwoven fabric is less than 17 μm, the filtration efficiency increased as the pore diameter decreased; when the pore diameter of the nonwoven fabric is larger than 17 μm. In a wide range, the pressure drop decreased as the fiber diameter decreased.

Sign in / Sign up

Export Citation Format

Share Document