Air pollution in industrial enterprises

Airborne pumps

basic principle of ventilation

Centrifugal exhaust veshilyatory

Determination of air exchange

dust control

Exhaust System

Forced ventilation on confectionery

Hourly values

mist of water vapor

pressure loss in the flare emissions

radioactive dust

scheme of the central pressure inlet system

Special prechamber

temperature gradient

Ventilation at bakeries

Ventilation in the Confectionery Factory

ventilation when dealing with heat


mist of water vapor

The fog of steam - harmful and dangerous for the garding of the safety and building constructions. Risk to humans is mainly in the deterioration or even complete lack of visibility that can lead to accidents. Particularly dense fog with the shortage of heat in the lower zone of the room near the doors, windows and loosely covered with openings. In case of insufficient ventilation in the lower zone of shops inevitably formed a dense fog.

Fighting fog hampered in the absence of indoor heat. On the contrary, with considerable heat, creating increased temperatures in the overlap, the fog in the upper zone is not formed. Local fogging over the sources parovydeleny dissolve in the upper zone and do not form a "secondary" fog, sliding down to the work zone. At low heat, or lack thereof, when the fight is only with the humidity, air circulation when general ventilation is determined by the maximum allowable relative humidity. In most cases, the maximum allowable is the relative humidity to 70-75%. With the simultaneous separation of heat and moisture, especially when the heat are significant (slope of more than 1200), the prevailing role played by excess heat, moisture extracted air is reduced to 30-50%. Make a reservation straight away that for values of r the order of 2000 and above the effect of moisture is almost no effect, and ventilation can be regarded as aimed at fighting heat with certain reservations, of course, as the aeration in the winter it is hardly possible.

When dealing with vlagovydeleniyami, particularly fogging, are widely used local pumps of all types. Most beneficial in terms of air flow and the most perfect in respect to sanitary and housing of any type, all harboring focus vlagovydeleniya. In this case, the flow of ventilation air per 1 kg of evaporated moisture is usually 15-20 kg. Apply when dealing with the moisture and airborne pumps, particularly at the liquid in the bath for more than 70 В° C. Air flow per 1 kg of evaporated moisture is 50-70 kg.

The most widely used in the fight against vlagovydeleniyami find the veil. Much less applicable individual umbrellas. They are only recommended for an evaporation temperature 70 -100 В° C, since only then formed a steady upward notok consisting of water vapor and air. The use of screens resulting in a relatively cost-effective ventilation, where air flow is 40-50 kg / kg.

To localize vlagovydeleny fit Shop-shelter and shelter-visors. Their performance similar to those of housings and cabinets. Slit-like suction pumps and panels are used relatively infrequently, and pumps, funnels almost no use.

Hide and localize all the sources of local suction vlagovydeleniya largely failed. Typically, ventilation of wet mixed plants.

With anti-fog and moisture by local suction allow significant "breakthrough" unhealthy in the room. Vlagovydeleniya, broke into the room, or dissolve supply air to compensate for local exhaust, or further removed from the upper band.

In the presence of local suction-type enclosures, cabinets, etc., as well as the suction side can be assumed that the working zone of the room breaks up 15-20% of the released moisture. When the device breaks through curtains 20-30% of the released moisture, for umbrellas - 30-35%, respectively.