SU578993A1 - Method of cleaning air from ozone - Google Patents

Description

The invention relates to a method for cleaning oznuh from ozone and can be used in shipbuilding, during welding, at ozone stations.

Known methods of cleaning air from

ozone by decomposing it at high temperatures from 38 ° C and above or by the action of ultraviolet irradiation 1 and 2.

However, these methods require significant energy consumption, primarily due to the need for rapid heating of the entire purified stream and its subsequent cooling, which requires a long irradiation time of about 25 minutes. At the same time, the dimensions of the devices used are extremely large.

Closest to the proposed method of cleaning air from ozone using different grades of active carbons

.

In this method, preheated air to a temperature of 35-40 C is passed through a layer of activated carbon at a speed of not higher than 0, OOZ m / s until ozone breakthrough in air with a concentration of

-g4

 mg / l, which corresponds to the sanitary standard on the ozone content in vapuha.

A significant drawback of the method is the need to carry out the process at low linear speeds x 1; from the flow of purified air, the generation of toxic carbon monoxide and carbon dioxide into purified air and the formation of explosive oxygen sources.

In order to lead off (1x the efficiency of air purification from ozone, excluding the generation of toxic substances into the purified stream and the formation of explosive components, decomposition is carried out on a moistened styrene-divinylbenzene-based anionite in a yo-yen form with subsequent anionnthe regeneration in a known manner.

Claims (2)

This difference allows you to increase the flow rate of the purified air from OOOZ to O, 3 m / s (10 times), while the dynamic working capacity compared to carbon filter with comparable conditions x two times higher, which is 2 , Sr1O of the Booavxa volumes per one kilo of the anion-exchange layer, and S1H coal 2,. Consequently, with this performance and the same performance, anionite filling devices will be much more compact compared to coal, using antioxide | The presence of moisture in the cleaned potkvk contributes to cleaning, and when using active carbon worsens it. According to the proposed method, the formation of explosive ozonides is eliminated, since the oxidative effect of ozone in this case is directed to the ioids {1ones having a high reduction potential in the resin. Example. Through a column with a diameter of 22 mm, loaded with 2 g of AV-17 anion exchanger. In the iodide form with a humidity of 2O%, air is passed containing ozone with a concentration of 0.01 mg / l and relative humidity of 90%, with a velocity of 0.3m / s at 2O From before the appearance of breakthrough. 9.5 m of purified air was passed through the anion-exchange filter, which amounts to 2.5 to 10 volumes of air per volume of resin. Claims of the method for purifying air from ozone by decomposing the latter on a solid sorbent, with whole increases (the efficiency of air purification from ozone, eliminating the generation of toxic substances into the purified stream and treating explosive components, decomposition is carried out on a moistened styrene-divinylbenzene-based anion exchanger, in iodide form with subsequent regeneration of the anion exchanger in a way. Sources of information taken into account in the examination: 1. US patent number 2980494, class 55-26 18.O4.61. 2. Author's certificate No. 286987, mi. B 01 J 23/74, 10.06.71. S.V.-R.Tieitz.ja.L.Bitnef. Cctr-ton 11, No. 4, 393-4О1, 1973.