Reasons for Filter Bag Failure and Method Development to Improve its Life Span

Patnaik, Asis; Anandjiwala, Rajesh D.

doi:10.1002/ceat.201500282

Cited by 9 publications

(4 citation statements)

References 23 publications

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“…Exposing uncoated PAN fabrics to H 2 SO 4 is found to decrease the tensile strength more than those coated with nanoclay. The nanoclay layer reduces the degradation of fibres by acting as a barrier between acid and fibres [15].…”

Section: Introductionmentioning

confidence: 99%

The use of the Box–Behnken experimental design to model tensile strength of spunlaced fabrics and evaluating fabrics behaviour in acidic condition

Maduna

Patnaik

Nayak

2019

Journal of Industrial Textiles

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Determining the tensile strength of nonwoven fabrics is one of the important factors considered for operational performance of the fabrics, especially for fabrics that are exposed to acidic condition. Polyacrylonitrile (PAN), polyphenylene sulfide (PPS) and polyimide (PI) fibres are used to produce fabrics that can withstand harsh chemical condition and still possess the required tensile strength; however, over a period of time the tensile strength gradually decreases. The Box–Behnken design method results showed that it can model and describe the effects of process parameters on the tensile strength of spunlaced fabrics in both cross direction and machine direction. The contour plots’ results indicate that varying the fibres polyacrylonitrile (−1), polyphenylene sulfide (0) and polyphenylene sulphide/polyimide (1) from −1 to 1 increases the fabric tensile strength in both machine direction and cross direction. For water jet pressure 60 bar (−1), 80 bar (0) and 100 bar (1), increasing the pressure from −1 to 1 increases the fabric tensile strength in cross direction but in the machine direction the fabric strength decreases. Increasing the fabric area weight of 440 g/m2 (−1), 500 g/m2 (0) and 560 g/m2 (1) from −1 to 1 decreases the tensile strength. Exposing fabrics to sulphuric acid (H2SO4) decreases the fabric tensile strength in both machine direction and cross direction due to the degradation of the fibres and the loss decreases gradually with the duration of exposure. For PAN fabrics, the tensile strength decreases by 21% and that of PPS and PPS/PI fabrics decrease by 10% and 6%, respectively.

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Section: Introductionmentioning

confidence: 99%

The use of the Box–Behnken experimental design to model tensile strength of spunlaced fabrics and evaluating fabrics behaviour in acidic condition

Maduna

Patnaik

Nayak

2019

Journal of Industrial Textiles

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“…For instance, hybrid electrostatic precipitators with different filter bags have demonstrated significant advantages over conventional bag filters in terms of dust removal performance, cycle life, and energy consumption [7,8]. Some studies indicate that bag filters coated with a mixture of acrylic binder and nano-clay offer improved durability compared to normal bags [9]. Additionally, an operational parameter study found that the pressure drop across the fabric and the accumulated dust layer increased exponentially with increased dust loading on the filter [10].…”

Section: R = E^(-t/m)mentioning

confidence: 99%

“…Additionally, an operational parameter study found that the pressure drop across the fabric and the accumulated dust layer increased exponentially with increased dust loading on the filter [10]. Studies have also focused on factors such as filter pore size, fiber diameter, and filtration efficiency [11], optimization of filtration performance using multi-fiber filter bags [12], and the reasons for filter bag failures and methods to improve their lifespan [13].…”

Section: R = E^(-t/m)mentioning

confidence: 99%

A Study on Failure Rate, Reliability, and Collection Efficiency Trend of Bag Filters in a Cement Plant

Jena,

Mishra,

Moharana

2023

J. Chem. Eng. Res. Updates.

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This thesis presents a comprehensive study on the failure rate, reliability, and collection efficiency trends of bag filters in a cement plant over 15 years. Bag filters are vital pollution control equipment used in various industries, including cement plants, to maintain environmental compliance. Understanding their performance and failure patterns is crucial to ensure efficient and reliable operation while adhering to stringent pollution control standards. The research findings reveal that the failure rate trend of bag filters closely follows the bathtub curve, with an initial high failure rate, a period of lower failures, and a subsequent increase in failures as the equipment nears the end of its life cycle. Reliability trends align with Madhab's Hat curve, exhibiting higher reliability during the first 10 to 12 years of operation, followed by a decline in reliability. The collection efficiency of bag filters declines as the equipment ages, with the efficiency decreasing from 99.998% in the early years to 95.05% in the 15th year. This emphasizes the importance of maintenance and retrofitting for older dust collection equipment to maintain high collection efficiency. The study concludes that the typical life span of bag filters ranges from 10 to 15 years, after which major maintenance interventions are necessary to minimize failure rates. The research provides valuable insights for maintenance engineers, design engineers, and reliability engineers, enabling them to improve the performance of pollution control equipment, such as bag filters, reverse air bag houses (RABH), and electrostatic precipitators (ESP), to meet the pollution control standards set by regulatory authorities.

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“…This phenomenon makes the fabric around the seams loss the capacity of filtration. Thus, the seams result to the decrease usage rate of the filter bag [5,6]. The loss of the filtration efficiency was about 10%.…”

Section: Introductionmentioning

confidence: 99%

Filtration performance of biaxial circular seamless knitted filter material based on electrostatic adsorption

Mao

Pan

2021

Journal of Industrial Textiles

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In order to solve the problem of dust accumulation at the joints of traditional filter materials and the reduction of filtration efficiency, weft knitting was selected to make the fabric cylindrical unwinding machine. The cylindrical filter material was formed by cylindrical needling machine in the later period. This type of novel seamless filter material was compared with the traditional one on the filtration performance and numerical simulation of filtration performance. The results show that when the warp and weft lining yarns in the seamless filter material were PTFE monofilaments containing tourmaline particles, the filtration efficiency was the optimal due to the presence of the surface static voltage. The filtration efficiency could greatly be improved by 7.24%. The relationship between the surface static voltage and distance was exponential. The filter material with electrostatic field on the surface increased the active filtration of electrostatic adsorption in addition to the passive filtration. This type of seamless filter material provided research and development ideas and theoretical guidance for the development and application of filter materials.

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Reasons for Filter Bag Failure and Method Development to Improve its Life Span

Cited by 9 publications

References 23 publications

The use of the Box–Behnken experimental design to model tensile strength of spunlaced fabrics and evaluating fabrics behaviour in acidic condition

The use of the Box–Behnken experimental design to model tensile strength of spunlaced fabrics and evaluating fabrics behaviour in acidic condition

A Study on Failure Rate, Reliability, and Collection Efficiency Trend of Bag Filters in a Cement Plant

Filtration performance of biaxial circular seamless knitted filter material based on electrostatic adsorption

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