| 摘要 |
<p>PURPOSE:To eliminate gases harmful to preservation of a perishable material in a preservation apparatus circulating an exhaust gas of a combustion furnace to a storage chamber, by providing the apparatus with a catalyst for eliminating carbon monoxide, etc. CONSTITUTION:Exhaust gas of a combustion furnace 12 is supplied to a storage chamber 1 for the preservation of perishable materials and the air in the storage chamber 1 is circulated to the combustion furnace 12. In the perishable material preservation specific having the above structure, a catalyst 12a for eliminating carbon monoxide, etc., is placed at the downstream of the combustion furnace 12 and adsorption devices 22, 23 for excess carbon dioxide gas is placed at the downstream of the catalyst 12a. The surface temperature of the catalyst or the gas temperature at the upstream of the catalyst is detected by a temperature detection means 48 and each part is operated after rise of the temperature at a level above the temperature to reach 100% cleaning capability of the catalyst. The intrusion of harmful gas into the storage chamber can be prevented by this apparatus.</p> |
