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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Common side pumps

Usual side pumps are widely distributed not only in the electroplating and pickling workshops on and in many other industries. They are used to locate hazards of thermal quenching tanks in the shops, the impregnating baths at various vacuum devices to periodically opening the lid, at smelters in the inability kapsyulyatsii, in the open. Troughs of harmful emissions, have narrow and long tables, where hand-made work associated with the release of gases and dust. Corner side pumps are used to remove fumes and dust from the square in terms of vehicles and trains in knockout cast.

In all cases it is impossible to cover the mirror with a noxious secretions cover, side suction is an effective local suction if it is properly designed and properly designed. Unfortunately, to date, the method of calculation only for the suction side of electroplating by pickling baths.

If the mirror separation pollutant has a large width, even a two-side suction is ineffective. As is known from the theory of jets, the spectra of absorption is very limited, even at considerable speed in the section of the slit. Shut off suction torch mirror considerable width can not, in the middle of its velocity is so small that they do not prevent slippage hazards in the room. Therefore, the limit for bilateral aspiration is considered the width, the mirrors 1,6 m (for galvanic baths -1.2 L).

For the unilateral side suction limiting wide mirror is 0.8 m (for galvanic baths 0.0 m). However, two-way flow of air suction more profitable than single-sided, even with a small width of the mirror, so that in all ate) in cases when it may be recommended when the width of the mirror more than 500 mm in a two-track borgovoy suction. If the mirror has a wide selection hazards more than 1,6 m, it is necessary to use activated board of soybean, ie, the suction from the vent. It is effective and relatively economical, provided over the mirror hazards no protruding parts. If the above are the mirror protruding parts, suspension, rod, themselves the product, the effect of suction vent is sharply reduced.

During operation of any open pot or tub inevitable periods when processed product or material is loaded and unloaded. At the same time raised above the liquid level objects constitute an obstacle to fresh air from the exhaust vent crust. In periods of loading n unloading vent is so inefficient (and sometimes even harmful) that sometimes it is turned off. If you find a product or material under the liquid level continuously, and the time of loading and unloading is insignificant, then the application of suction from the vent is no objection. For the reverse ratio of on-board with suction vent is hardly rational, and to look for another solution.

It is worth mentioning that in the presence of speakers above the mirror normal subjects suction side, too, becomes less efficient and requires almost double the volume of air. If the upper edge of the suction slit board is flush with the protruding above the surface of the liquid products, or electrodes, the amount of air being removed by suction board shall be increased by about 70%.