Laboratory gas scrubber

A laboratory gas scrubber for removing soluble contaminant gases from the exhaust air of a laboratory extractor hood comprising a cabinet (1) which is adapted to be used in conjunction with a laboratory extractor hood, said cabinet (1) having upper and lower portions, pump means (5) for pumping scrubbing liquid from a scrubbing liquid tank (3), said pump means (5) and said scrubbing liquid tank (3) being located in said cabinet lower portion, means defining an inner housing (2) in said cabinet upper portion, partition means (12) for defining within said inner housing (2) a first inner housing chamber and a second inner housing chamber, first inlet means (10) for introducing exhaust air emerging from a laboratory extractor hood into said first inner housing chamber which subsequently flows into said second inner housing chamber, outlet means (9) for exhausting air from the second inner housing chamber;

• said second inner housing chamber including in succession a packing zone (6), a spraying zone (7) and an agglomeration zone (8) with the agglomeration zone (8) being most closely adjacent said outlet means (9) and said packing zone (6) being most remote from said outlet means (9);
• said agglomeration zone (8) being located generally above said spray zone (7) and said spray zone (7) being located generally above said packing zone (6), means (17, 18) for conducting scrubbing liquid from said scrubbing liquid tank (3) to said spraying zone (7) through and upon energization of said pump means (5), and means for energizing said pump means (5).