GAS FILTER FOR AIR CLEANING FROM HEAVY METAL CARBONYL VAPOURS AND AEROSOLS Russian patent published in 2009 - IPC A62B23/02 A62B7/10 

FIELD: mechanics.

SUBSTANCE: gas filter is composed of a cylindrical housing, bottom with inlet opening and outer threaded neck, three-layer charge part consisting of sorbent, desiccant and hopcalite layers placed in series along the air flow, top and bottom charge-holding grids, aerosol filter, cover with outlet opening and threaded neck to connect the filter to the face mask. Activated carbon with pore space V_∑=0.99-1.20 cm³/g and limit sorption volume W_S=0.72-0.85 cm³/g is used as sorbent material; and activated carbon with lithium bromide additive or activated carbon with lithium bromide and calcium chloride additives is used as desiccant material. Top grid is fixed in the cylindrical housing, and aerosol filter is of direct folded type made of cellulose and mineral-fiber materials.

EFFECT: high-quality and efficient air cleaning, increased service reliability.

3 cl, 3 dwg, 1 tbl