Dry dust collectors are a typical and gas coexistence space. Dust explosion risk assessments should be performed for effective prevention control of accidents. In this paper, assessment index system removal systems was constructed following the characteristics actual operation dry collector. The proposed consisted three first-level indexes (dust characteristic parameters, environmental paramete...

BACKGROUND Contaminated household dust is believed to be a major source of exposure for most children with elevated blood lead levels. To determine if a vigorous dust clean-up effort would reduce this exposure we conducted a randomized controlled field trial. METHODS We randomized 113 urban children between the ages of 6 and 36 months: 56 children to a lead dust intervention composed of mater...

The cement industry is the major source of cement dust which contains heavy metals like nickel, cobalt, lead, chromium, arsenic and hazardous substances like dioxins and furans. Exposure to these substances can cause health problems to human, animals and vegetation. A continuous pilot scale quartz sand filter was constructed and uses to study the effect of important design parameters (temperatu...

Effective localization of dust sources is possible through the use a dust-removing ventilation complex, which includes aspiration, general and secondary control. Aspiration systems ensure removal dusty air with its subsequent purification utilization trapped dust. The creation vacuum in shelters technological equipment helps to prevent from being knocked out into working area.
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Preliminary results from the June 1991 flight of MAX are presented. Simultaneous observations were made in bands centered at 6, 9, and 12 cm-1 with a bolometric receiver operating at 300 mK. The experimental sensitivities are the highest reported at angular scales of 0.3 degrees to 1.0 degrees. Interstellar dust is observed to have an emissivity [symbol, see text] nu 1.4+/-0.3 and to correlate ...

We report the first in situ detection of metal ions in the upper atmosphere of Mars resulting from the ablation of dust particles from comet Siding Spring. This detection was carried out by the Neutral Gas and Ion Mass Spectrometer on board the Mars Atmosphere and Volatile Evolution Mission. Metal ions of Na, Mg, Al, K, Ti, Cr, Mn, Fe, Co, Ni, Cu, and Zn, and possibly of Si, and Ca, were identi...

We have developed a theoretical description of how of an asteroid’s polarizationphase curve will be affected by the removal of the dust from the surface due to a sizedependent phenomenon such as radiation pressure-driven escape of levitated particles. We test our calculations against new observations of four small (D ≈ 1 km) nearEarth asteroids [(85236), (142348), (162900) and 2006 SZ217] obtai...

Introduction: In future human exploration of Mars, many challenges face us. Mars is a dusty planet and dust and windblown particulates will present one of the most significant difficulties [1]. The dust and granular regolith will challenge materials, machines, and people. Our experience with dust-covered astronauts on the Moon and with landers and rovers on Mars suggests that significant effort...

A high performance KIER TYPE CYBAGFILTER that combines a fabric filtration and centrifugal dust removal technologies was developed to maintain high performance of the existing bag filter. Based on the performance results obtained from a pilot-scale test unit and fluid dynamics computer simulation, a test CYBAGFILTER of 18,000m3/hr capacity was installed in the clinker calcination process of Yon...