| 摘要 |
<p>A method for treating waste gas and a device for performing the method, which can treat a large amount of waste gas containing dilute gaseous hydrogen carbide for separation of the dilute gaseous hydrogen carbide safely, easily and efficiently, and can reduce, after the treating, a gaseous hydrogen carbide concentration remaining in the waste gas to be exhausted into the air to up to 100 ppm. The method comprises the steps of (1) using as an adsorption device an adsorbent layer and adsorption columns (1a, 1b) for cooling the layer, (2) filling into the adsorption columns active carbon and Y-type synthetic zeolite over the active carbon, (3) switching between adsorption and desorption alternately at a switching timing determined by operating automatically adsorption/desorption switching valves (d) according to an instruction of 'an estimated concentration at which the absorbent layer breaks through' by a data logger, (4) using 'water' at adsorption and sucking it by a water-sealed vacuum pump (14), and (5) returning the entire amount of purged exhaust gas into a waste gas feed pipe (11) while (6) treating liquid from a gas/liquid separator (16) at an industrial waste treating device (17).</p> |
