THE PURIFICATION METHOD AND THE PURIFICATION DEVICE REFINING AS LOW DENSITY BIO-METHANE

摘要

The present invention relates to a refining method of a low concentration methane gas, capable of maximizing separation and collection process efficiency of carbon dioxide (CO_2) and methane gas (CH_4) by installing multistage absorption tower at a high speed flow circulation type apparatus to separate and purify ammonia gas (NH_3) and hydrogen sulfide gas (H_2S) which are representative impurities in a system of purifying and treating low concentration methane gas generated during a anaerobic digestion process of organic waste such as food waste into high concentration methane gas through purification. More particularly, first, an ammonia (NH_3) gas included in a low concentration methane gas is absorbed and eluted using water in a high speed flow circulation type absorption tower with multistage, and second, a hydrogen sulfide (H2S) gas is removed by a wet catalyst chemical reaction absorption method using a liquid Fe-chelate catalyst synthesized using an organic acid salt as a dispersing agent in a high speed flow circulation type absorption tower with multistage designed to have the same structure.