Patent ID: 8845971
Filing Date: 2014-09-30
Classification: B01D

Abstract:
1. An apparatus for purifying and neutralizing toxic gases comprising: a main body having an intake, an exhaust and a control panel; a pre-filter, a first filter, a neutralizing pellet bed, and a second filter which are mounted in the main body and are placed from the intake to the exhaust in order; and a blower and a driving device placed between the neutralizing pellet bed and the second filter or the first filter and the neutralizing pellet bed; wherein the first filter is a HEPA (High Efficiency Particulated Arrestor) filter or an ULPA (Ultra Low Penetration Absolute) filter; the second filter is a non-woven fabric filter added with solid particles of activated charcoal and a basic metal oxide, or a non-woven activated carbon fiber filter added with a basic metal oxide;and the neutralizing pellet bed comprises a first pellet which consists of an adsorbent, a basic metal oxide and an amphoteric metal oxide, a second pellet which consists of a basic metal oxide, an oxidant and an amphoteric metal oxide, and a third pellet which consists of a basic metal oxide and an amphoteric metal oxide, the first pellet, the second pellet and the third pellet being layered orderly, or mixed randomly in a weight ratio of 1:1-5:3-10.