• Title, Summary, Keyword: bag filter

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Filtration Performance Characteristics according to Filter Bag Structure for Application of Industries (산업용 필터백의 구조에 따른 여과성능 특성)

  • Jeon, Seong-Min;Hasolli, Naim;Lee, Kang-San;Lee, Jea-Rang;Kim, Kwang-Deuk;Park, Young-Ok
    • Journal of Korean Society for Atmospheric Environment
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    • v.32 no.4
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    • pp.384-393
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    • 2016
  • In this study, two kinds of industrial filter bags were tested for their filtration performance to apply the existing bag filter systems. Experimental variables were examined for pressure drop, cleaning interval, residual pressure drop, cleaning efficiency, fractional grade efficiency, total collection efficiency according to the filter bag structure. According to these results, the filter bags tested in this study demonstrated good performance in dust collection. This was also true for the double surface filter bag. The lifetime was longer than the round type filter bag because the filtration area was more than 1.6 times wider and the filter quality factor was much higher. Therefore, double surface filter bags are suggested to be used in order to increase filtration performance of the bag filter systems.

Characteristics of Electrostatic Cyclone-Bag Filter with Upper Inlet (상부유입식 전기 Cyclone-Bag Filter의 특성)

  • 여석준
    • Journal of Korean Society for Atmospheric Environment
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    • v.16 no.2
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    • pp.179-190
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    • 2000
  • The main object of this study was to investigate experimentally the characteristics of electrostatic cyclone-bag filter with upper tangential inlet in order to overcome the low collection efficiency for the submicron particle and high pressure drop which were main problems of general fabric bag filters. The experiment was carried out for the analysis of collection efficiency and pressure drop of electrostatic cyclone-bag filter comparing to those of fabric bag filter with various experimental parameters such as the inlet velocity(filtration velocity) and applied voltage etc. In the results the upper tangential inlet type showed higher collection efficiency for submicron particles below 2 ${\mu}{\textrm}{m}$ in diameter than that of center inlet and over 99.9% for overall collection efficiency. Pressure drop reduction ratios were shown as 40-50% for the applied voltage 0kV by centrifugal force and 70-90% for 20k V by the centrifuga and electrostatic force with the tangential inlet velocity (12-21m/s)

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System Development for Removing Dust & Odor from Manufacturing Process of Resin Products (I) (수지제품 가공시 발생하는 분진 및 악취 제거 시스템 개발(I))

  • Yun, Huy-Kwan;Kim, Jae Yong
    • Applied Chemistry for Engineering
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    • v.20 no.2
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    • pp.218-222
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    • 2009
  • As we look into the related technologies at home and abroad, the odor and dust removal technologies did not make us satisfied because its removal method is not appropriate and its economical efficiency was low. If bad odor and dust were generated simultaneously, we should install two removal factories separately, and it made a big problem. Consequently, we investigated to obtain the related basic information for a new hybrid bag filter system which can remove both odor and dust at the same time, using bag filter with ACF (dual filter type).

Simultaneous Removal Characteristics of Particulate and Elemental Mercury in Convergence Particulate Collector (융합형여과집진장치에서의 먼지입자와 원소수은의 제거 성능 특성)

  • Park, Young Ok;Jeong, Ju Yeong
    • Particle and aerosol research
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    • v.6 no.4
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    • pp.173-183
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    • 2010
  • The high temperature pleated filter bags which were used during this study were made of pleated nonwoven fabric of heat and acid resistant polysulfonate fibers which can withstand the heat up to $300^{\circ}C$ and have a filtration area which is 3 to 5 times larger than the conventional round filter bags. Cartridge module packed with 3 kind of the sulfur impregnated activated-carbon based sorbents were inserted in the inner of the pleated filter bag. This type of pleated filter bag was designed to remove not only the particulate matter but also the gaseous elemental mercury. The electrostatic precipitator part can enhance the particulate removal efficiency and reduce the pressure drop of the pleated filter bag by agglomerated particles to form a more porous dust layer on the surface of the pleated bag which is increased the filter bag cleaning efficiency. In addition, the most of particles are separated from the flue gas stream through the cyclone and the electrostatic precipitator part which were installed at the lower part and main body part of the convergence particulate collector, respectively. Thus reduce particulate loading of the high temperature pleated filter bags were applied in this study to analyze the removal characteristics of particulate matter and gaseous elemental mercury.

Characteristics of Cyclone-Bag Filter with Bottom Inlet (하부유입식 원심 여과집진장치의 특성)

  • Yoa, Seok-Jun
    • Journal of Korean Society of Environmental Engineers
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    • v.22 no.4
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    • pp.639-650
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    • 2000
  • The main object of this study was to investigate experimentally the characteristics of cyclone-bag filter with bottom inlet to decrease the high pressure drop which was one of main problems of fabric bag filter. The experiment was executed for the analysis of collection efficiency and pressure drop(specially, pressure drop of fabric filter) characteristics of the cyclone-bag filter in comparison with those of general fabric bag filter with various experimental parameters such as the inlet velocity, dust loading and variation of vortex region, etc. In the results, the tangential inlet type showed higher collection efficiency for submicron particles below $1{\mu}m$ in diameter than of center inlet, and over 99% for overall collection efficiency. For the inlet particle concentration $100mg/m^3$, pressure drop reduction ratios were shown as 15~38% with the inlet velocity in case of large bag, while 30~48% for small bag due to the increase of vortex region.

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The Fundamental Study on Pulse Jet Cleaning of Rectangular Bag-Filter System (사각형 여과 집진기 충격기류 탈진시스템의 기초 연구)

  • Piao, Cheng Xu;Kim, Tae Hyeung;Yang, Jun Ho;Li, Xiao Yu;Ha, Hyun Chul;Jung, Jae Hun
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.18 no.2
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    • pp.149-160
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    • 2008
  • Bag-filter system has been widely used in industrial field to remove the particulate matters from the exhaust gas. The cylindrical type of bag-filter has been generally used. But it has many shortcomings. The reattachment of separated particles on the surface of bags could result in high pressure drop of bag-filter system and subsequent decrease of air flow rate since the cylindrical type bag-filter system should have the upward flow pattern. In addition, the supply of very high pressure pulse air jet to remove particulate matters on the surface of filter could result in a frequent rupture of bags. To overcome these shortcomings of the cylindrical type, the rectangular type was developed in the developed countries and imported to Korea. But, there was not many design data available to understand the mechanisms. Thus, the fundamental experiments were conducted in this study to get some ideas about the pulse jet cleaning of rectangular type bag filter system. The experimental factors are as follows; pulse distance, pulse duration, pulse interval, pulse pressure and pulse nozzle type. Experiments followed the factorial design method. With the shorter pulse distance, the distribution of pressure drops was relatively not uniform while the particulate removal efficiency was higher. With the longer duration of pulsing and the more number of pulse nozzle, the removal efficiency was higher and the pressure drop distribution was more uniform.

A study on the Polymer surface treatment of GF-filter bag for collection of fine Particle like carbon black (카본블랙류 미세입자 포집을 위한 유리섬유 필터백의 고분자 표면처리에 관한 연구)

  • Lee, B.;Choi, H.L.;Moon, C.K.
    • Journal of the Korea Society For Power System Engineering
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    • v.12 no.3
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    • pp.55-59
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    • 2008
  • In this paper, we have investigated on collection efficiency of fine particle of glass fiber-filter bag according to the surface treatment. The solution consisted of polytetrafluoroethylene(teflon), graphite powder, silicon resin and water was used as a basic surface treatment agent. Tensile strength of glass filter-bag increased with up to 3hrs and then decreased with surface treatment time. Tensile strength and initial modulus of the glass fiber-filter bag treated by iodine after basic surface treatment for 3hrs were lower than those of basic surface treatment for 3hrs, however collection efficiency and fracture strain were higher than those of basic surface treatment for 3hrs. Glass fiber-filter bag with lower initial modulus and more strain will be extend the durable period and the one treated by iodine after basic surface treatment 3or 3hrs is expected high collection efficiency of fine particle. This method makes it possible to manufacture glass fiber-filter bag of the optimum condition.

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Experimental Study on Optimum Pulse Jet Cleaning Conditions of a Cartridge Filter System (카트리지 필터 여과집진기 충격기류시스템의 최적탈진조건에 관한 실험적 연구)

  • Piao, Cheng Xu;Ha, Hyun Chul;Kim, Sung Joon
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.25 no.4
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    • pp.542-553
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    • 2015
  • Objectives: Many types of dust collector are used for industrial ventilation, with the most common types being the cylinder bag filter system, rectangular bag filter system and cylinder type cartridge filter system. The cylinder type cartridge bag filter, which has more filtering area than other types of bag filter, can increase the pulse time and extend the useful life of the filter. This can save operational costs and installation area. Materials: This study used cylinder type cartridge bag filter equipment and tested the impact of vibration level and filter pressure with different pulse jet cleaning conditions. The final, cleaning efficiency was calculated through input dust mass and cleaning dust mass Conclusions: Two optimum cleaning condition groups were found. The first condition group was $3kgf/cm^2$ pulse pressure, 15 cm pulse distance, 0.2 s pulse time with an H-10 type nozzle. The second condition group was $3kgf/cm^2$ pulse pressure, 15 cm pulse distance, 0.3 s pulse time with an H-10 type nozzle.

Filtration Performance and Physical Properties of Bag Filter Media with Polytetrafluoroethylene Coating Treatments (Polytetrafluoroethylene 코팅 처리된 백필터 여재의 여과성능과 물리적 특성)

  • Yeo, Sang-Young;Kim, Sook-Rae;Jeong, Sung-Hoon
    • Textile Science and Engineering
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    • v.42 no.5
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    • pp.329-335
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    • 2005
  • Bag filter media were prepared by a combination of needle punching and thermal bonding processes and treated with Polytetrafluoroethylene(PTFE) aqueous solution. The air permeability of the prepared filter media increased with increasing needle strokes. As needling strokes increased, the pore size distribution became narrow and the tensile strength in the machine and cross direction approached an intermediate value suggesting isotropic nature. From the result of air filter performance test, the pressure difference of bag filter media decreased and the collection efficiency increased with increasing-needle strokes under a constant air flow rate. Both air permeability and average pore size of the coated filter media were largely reduced by the PTFE coating treatment. After PTFE coating, we identified a big decrease in the dust concentration compared with control media. Therefore, the filtration performances such as collection efficiency and pressure difference of bag filter media were promoted by the PTFE coating treatment.

Experimental study on the optimum pulse jet cleaning conditions of a rectangular bag-filter system (사각형 여과집진기 충격기류 시스템의 최적탈진조건에 관한 실험적 연구)

  • Piao, Cheng Xu;Kim, Tae Hyeung;Li, Xiao Yu;Ha, Hyun Chul;Jung, Jae Hun
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.18 no.3
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    • pp.189-203
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    • 2008
  • Cylindrical bag filter system with pulse jet cleaning has been the most common device to control particle laden exhaust gas from the various industrial processes. But, it has many shortcomings due to particle reattachment and frequent bag rupture. In recent years, rectangular type bag filter system has been developed to overcome the problems associated with the cylindrical system. However, not many studies about the rectangular system were not done, compared to the cylindrical system. In this study, the optimum pulse jet cleaning conditions were thus tested by the series of experiments. The factors tested in this study are pulse distance, pulse pressure, pulse duration, the number of holes for pulsing and bag materials. A single bag ($1,500mmL{\times}50mmW{\times}300mmH$) system and a multi-bags (3 bags in a row) were tested separately. The highest removal efficiency with a single bag system was found at the conditions with pulse distance of 10cm, pulse pressure of $3kg/cm^2$, pulse duration of 0.3s, pulse jet number of 6 and Polyester bag. With the multi-bags system, the best cleaning conditions were found at the bag interval of 20cm with the simultaneous pulsing and the bag interval of 15cm with the serial pulsing.