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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General ventilation sulfur - barium shop is usually achieved aeration. Hood is made through nezaduvaemye lights or mine, the influx - through transom windows. Mechanical influx is not required, except for air dushprovaniya in rotary kilns. Usually sufficient to have two showers for each oven, the performance of full-time soul 4000-5000 ml / n.

In the zinc shop ventilation exhaust flow-mechanically heated and mixed flow of extraction. Local pumps are arranged from all reactors and tanks to dissolve the zinc-containing materials in sulfuric acid, as well as from the reactor to clean the mud from iron. If the wooden vats, it should be very carefully sealing leaks their lids for wooden vats, we can assume that the area of the slits is 100% of the viewing area and boot covers.

Velocity in the holes and hatches in the crevices are encouraged to nominate at least 1,3 m / s, given by pyleobrazovanpe for unloading of dry materials.

Repulpatory for flushing sediments are also provided with local suction. Since there is no dust emission and gas emission, the calculated velocity is taken of the order of 0,4-0,5 m / sec. Filtering solutions produced in a hot state usually filter press. Thus there is a pretty intense soaring. Since a pair of acid, then cover with the appropriate filter exhaust of air is highly desirable.

In addition to local suction in the room is arranged general exchange of zinc plant extract from the upper zone of each floor or tier. The volume of exhaust air shall be appointed on the basis of two or three times the exchange per hour.

Exhaust air from the reactor and repulpatorov may be a mechanical drive or a natural by individual mines. Mechanical ventilation is preferable, especially in the presence of dust. Ducts are made of vinyl plastic to prevent corrosion. Supply air is supplied mainly in the work area or slightly above it - in the middle. Forced installation can be combined with heating.

In lithopone shop aspirated tract dry lithopone - semi-finished and finished product. Aspirated and mills for dry grinding (mostly disintegrating) and packaging machinery. Aspiration of the past is similar to that in the manufacture of titanium pigments.

Slotted local pumps necessarily arranged in ovens for baking the raw lithopone. Of these furnaces is allocated sulfur dioxide in large quantities. Air velocity in the suction slit suction is taken not less than 5 m / sec, retort furnaces - even up to 8 m / sec.

reactors or tanks to form lithopone supplied by local suction devices that create speed in the working aperture of the order of 0,7 m / sec. Hood can be mechanical or natural.

In addition to aspiration and gazoudalyayuschih local suction in lithopone shop should get general exchange stretching from the upper zone with a multiplicity of at least 1,5-2. Depending on local conditions of supply air can be supplied in part nepodogretym (aeration). More often organized mechanical heated flows to the middle zone of shops. Emergency ventilation lithopone production is not required.