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


Efficacy of flare emissions

In late 1962 the laboratory by heating ventilation Institute of sanitary engineering work has been done on the topic "Investigation of the effectiveness of flare emissions." As a result of blowing in the wind tunnel stained jet Fig. 16. Distortion and erosion scab obtained very interesting pictures, showing the extent of erosion and distortion of the jet emanating from the nozzle. One of the pictures taken from that paper, is shown in Fig. 16 - Experience, as recorded in the picture, was conducted at a ratio of jet exit velocity and flow velocity (wind) with equal to ~ 13.

Unfortunately, processing the experimental materials (in particular, images), authors have completely ignored the most interesting range of relations ~ 8: 15. Due to the above authors found curve between the height of the axis of the curved jet, and the ratio can not be practically used to calculate flare emissions. Also can not be recommended for practical use and the authors inferred an empirical formula.

We note that this formula is similar in structure to the formula Klyugina. The difference lies in the numerical ratio (1,95 and 4,2) and also available in the last formula, the constant value 0.7, deducted from the relationship. For values of this ratio equal to 10 or higher (range, we are interested in), no large error can be neglected 0,7. If you do not pay attention to na small difference of the exponents (0,65 and 0,63), then by Klyugina value will be approximately 2 times greater than the formula the authors considered work.

Empirical formulas derived on the basis of experiments with steady incident flow, do not take into account changes in the incoming flow of time. In fact, such "permanent" Wind does not happen: the wind all the time, pulsing and changing speed and direction. / 1lya interpreted the question the most interesting change in velocity. When we talk about the wind speed, say 5 m / sec (most common), Pa. In fact, we have in mind the wind, to periodically change the speed from zero to maximum.