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

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Wet cleaning

To capture the fibrous dust is possible and scrubbing. In potassium in a specially designed for cleaning of irrigation fibrous dust filter design labels. Fig. 27 shows an irrigation filter small model of a capacity of 3000 m3 / h. Dust-laden air is fed through a side tube at a speed of 15 m / sec and, striking the surface of the water changes direction by 180 В°. The air passes through the rain the space created by using nets with small holes, then passed through a pneumatic layer of porcelain rings and assigned to the fan through the upper sleeve. Sludge that accumulates in the bottom of the hull periodically removed through the hatch, fine as dust, passing through the grid, immediately drain the water into drains.

Trickling filter resistance under normal load - about 45 kg/m2. Water consumption 0.50-0.60 l/m3.

According to the candidate. Tekhn. Science PV Sidyakova may catch fibrous dust in cyclones Lyoto with a water film. These dust collectors to cope with fibrous dust under the condition at practically any dusts, with the exception of fibrous and catches. The disadvantage is their relatively high consumption of water, as well as considerable height.

Small-scale cyclones - washers SIOT free from defects VTI scrubbers and work with low-flow water. But cyclones SIOT can not be used for cleaning the air with fine dust that can coagulate. With a substantial initial pylesoderzhanii and ability to dust coagulation excessively thick sludge can clog the cyclone and the outlet pipes and disrupt their work. In addition, transportation of thick sludge at all difficult. Additional dilution of the same sludge water (after the cyclone) deprives the dust collector SIOT it is based on the benefits - saving water.

Available empirical data on the work of the cyclone-washer for a restricted range of dusts and initial pylesoderzhany talk about the efficient operation of these devices.

For treatment of fibrous dust cyclone-washers are unsuitable.

Recently entered into a ventilation practices foam washers - Dust TRL (one-and dvuhpolochnye) proved to be effective aids in the near future they will obviously manufactured by the factory. Of can be recommended for air purification from dust at the initial concentration of up to 20 000 mg/m3, as well as input from the soluble gases and vapors. Foam dust collectors are not suitable for treatment of fibrous dust.

To clear the relatively small amounts of air in case of non-wetting of fine dust, such as metal, may be recommended by filter-bubbler. These dust collector air passes through the liquid layer.

The principal device filter - bubbler is shown in Fig. 28. Air enters through the central tube at a rate of about 5-6 m / sec, divided into separate streams and breaks through the liquid layer depth of 60-80 mm. Then the air passes through the pneumatic layer of porcelain rings and enters the fan. To prevent entrainment and achieve a high degree of purity close to 99.5%, air velocity in the annular section of the bubbler should not exceed 0,5 m / sec.