METHOD FOR CLEANING SUPPLY AIR FROM GASEOUS POLLUTANTS Russian patent published in 2021 - IPC B01D53/04 B01D35/01 B01J20/06 B01J20/10 

FIELD: air cleaning.

SUBSTANCE: invention relates to methods for cleaning the supply air of buildings from gaseous pollutants, in particular, cleaning the air of residential and office buildings in various supply ventilation systems of buildings, in supply valves of buildings located near highways with high traffic intensity, as well as in areas with increased air pollution from external sources of emission. Effective method for purification from gaseous pollutants of the supply air of premises is declared, which is expressed in a decrease in the concentration of gaseous pollutants in the supply air: carbon monoxide (II), aliphatic hydrocarbons (C1-C5), phenol, formaldehyde to the MAC level in the room due to the sequential passing of air through a shungite sorbent layer, a silica gel sorbent layer, a manganese dioxide-based catalyst layer, a zeolite sorbent layer in a mass ratio of 0.5:0.6:1:0.8, respectively, of a certain fractional composition. The first sorbent is shungite from the Zazhoginsky deposit with fractions of 1 mm, bulk density of 1800 kg/m³ and layer thickness of 20.45 mm. The second sorbent is technical silica gel WPSG (wide-pored silica gel) with fractions of 2.8 mm, bulk density of 760 kg/m³ and layer thickness of 21.55 mm. The third layer of catalyst based on manganese dioxide with fractions of 0.7-1 mm, bulk density 1400 kg/m³ and layer thickness 20 mm. The fourth sorbent is zeolite of the Kholinsky deposit with fractions of 1-3 mm, bulk density of 1020 kg/m³ and layer thickness of 20.45 mm. At the same time, the air transmission speed is 2.6-2.7 m/s.

EFFECT: provides purification of supply air from gaseous pollutants to obtain purified indoor air, reduction of concentrations of carbon monoxide (II), aliphatic hydrocarbons (C1-C5), phenol, formaldehyde to MAC concentrations in indoor air.

1 cl, 2 tbl