ventilation to combat the dust
The fight against industrial dust is most effective if it is complex, with technological and sanitary measures. To include technological activities that contribute to reduction of dust or even destroy it. For example, the replacement of dry grinding wet completely eliminate dusting. Application instead of mechanical transportation (augers, elevators, conveyors, etc.), pneumatic or hydraulic significantly reduces dust and makes the fight against dust. Pre-wash grinding material also helps to reduce dust during crushing and grinding.
Event, in some cases, giving an extremely high effect of reducing dust generation during the "dry" process is the hydration at which the processed product does not lose the properties found in "dry" product - a specific particle size and flowability. Material wetted up to 4-10%, processed and transported by methods used for material neuvlazhnennogo. Crushing and grinding, mixing and weighing, classification and transportation of manufactured without the use of water, but moist material largely loses the ability to dust.
Only occasionally was able to successfully deal with the dust alone vaporization. Before it necessary to raise the material hydration and the suppression of dust clouds by spraying water mist pods PLI. Same here also include fogging indoors, wet cleaning of dust, sprinkling, maintenance of sex in a constantly wet condition and other similar activities involving the use of water.
Most often struggle with industrial dust is the joint action of ventilation, gidroobespylivaniya and other measures. In special cases when gidroobespylivanie not possible for technology, dust control is performed mainly by means of ventilation and technological measures.
Ventilation in the fight against dust, usually arranged supply and exhaust. Organized by the forced ventilation - mechanical PLI with aeration. In the dusty shops are rarely seen considerable heat, the natural flow hood is used to compensate for the relatively rare (except for areas with a high outside temperature). The most typical dusty mechanical supply ventilation air heating in cold season.
Under the aspiration mean dust extraction ventilation having specific characteristics and removes air containing significant amounts of dust (more than 1000 mg/m3). Dust extraction ventilation is not having the inclined ducts, aspiration is not usually referred to, although it has much in common.
Aspiration occurs in crushing, grinding, casting, chemical and metallurgical shops and shops in composite glass enterprises. These shops tend to have greater height and are characterized by the absence of the floors (there are only working platforms), so that suction system can be performed with inclined ducts. In these workshops aspiration is often combined with gidroobespylivaniem.