Numerical Simulation Study On Structure Optimization Of Electronic Bag Dust Collector

Nowadays it becomes more and more serious for dust to damage people’s body and pollute natural environment, also dust accidents are in the majority of total accidents number, so people cotrol PM2.5 has become more and more strict, and it is of great significance to develop dust catcher of high-performance.This paper based on physical truth of electric-bag dust-catcher’s structure optimization, via software called FLUENT6.0 established consevation equations which are based on hydromechanics, using uds electric field programme and k-ε model to describe the peonomenon of establishing electric field of electric-bag dust-catcher and its turbulence, has researched on numerical simulation of air flow distribution, moving track of charged particles, change of pressure drop led by adding holes on plates, and filter-bag’s distribution in bag area under static area of electric-dust-catcher. With the numerical simulation being trust, we discuss diffirent aspects what influence electric-bag dust-catcher’s structure optimization, such as electrical distribution, adding holes on plates and bags distribution, get the minimum wipe-off particles, geometrical factors of dust collection plates and the best distribution method of bags. Then analyse mechanism of pressure change combining change condition of flow parameters, reach conclusions as fllowings:(1) Electric field intensity of direction to air flow is lower than direction to dust collection plates, would become strongest when centering on discharge wire.(2)When discharge wire burdened 45 k V, static area would produce stable electircal field, and the field would affect distribution of the flow.(3)As the minimum dust catching particle in static area is as small as 1.5μm, we conclude that as to electrostatic fabric filter, when coltage is sure, the minimum catching particle could be mure, and with the particles enlarging, the acting force from electric field becomes stronger, the particles become easier to be catched.(4) The suitable size of adding holes on the plates is from 0.324 m to 1.25 m, under condition of studying and getting dust catcher’s minimum wipe-off particles, we could make sure the size of adding holes.(5)The best rate of adding holes on the plates is 0.535 after analyses, dust collecting performance couldn’t be higher with the rate enlarging, but there exists the best rate for the dust collecting plates.(6)The size of holes’ best aperture on the plates is 0.095 m, and with the roughness of plates enhanced, plates’ abrasion magnified, we could get best rate of adding holes, size of adding holes and abrasion condition, what is in favour of researchment of electric bag dust-catcher’s structure design and optimization. Structure design fits the reality. The selection of plates’ roughness should be considered carefully to improve plates’ service life.(7) Distribution of bags would influence its dust collecting efficiency.This paper has done simulation researchment about factors in electric bag dust-catcher such as electric field, flow field, discharged particles, geometrical factors of dust collecting plates and distribution of bags, what has provide a kind of method for electric-bag dust-catcher’s structure optimization.