COMBINED FILTER (VERSIONS) Russian patent published in 2013 - IPC A62B23/02 

FIELD: salvage facilities.

SUBSTANCE: invention relates to breathing organs individual protection facilities (BOIPF) for a human being for protection against harmful substances. The combined filter comprises a body with an outer threaded neck, a bottom, a double-layer charge, an absorber, nets for fixation and separation of the charge, an anti-dust tampon. The absorber is made from layers on the basis of active carbon with metal sulfate and is arranged as the first along with inhaled air travelling. The anti-dust tampon is installed in the body as the last along with travel of the inhaled air. In the first layer of the charge the metal sulfate is copper sulfate and/or zinc sulfate. The second layer of the charge is an absorber on the basis of active aluminium oxide impregnated with barium permanganate and/or copper permanganate and/or zinc permanganate and/or nickel permanganate. Layers are taken at the volume ratio of 1.0:(0.5-2.0) accordingly. The combined filter additionally comprises an anti-aerosol filter. In the other version of realisation in the first layer of the charge the metal chloride is nickel chloride and/or zinc chloride, and/or cobalt chloride, and/or copper chloride. Additives in the form of metal chlorides may be accompanied by their oxychlorides.

EFFECT: combined filter of the first and second versions is a reliable and convenient element of human BOIPF during process operations in chemical enterprises, has long-term universal multiple protection against nitrogen and ammonia monooxide.

11 cl, 2 dwg