PURIFICATION APPARATUS OF BIOGAS AND CONTROL METHOD THEREOF

摘要

A purification device for biogas of the present invention controls the operation of an absorption module by the methane concentration of the biogas, and collects and recirculates bio-methane generated when the methane concentration is short for improving the quality of the final bio-methane. The decrease of purification capacity of the device by the change of temperature in atmosphere or biogas is prevented for improving the purification capacity, increasing the production amount of bio-methane, and improving the quality of bio-methane. [Reference numerals] (10) Blower; (2) Anaerobic extinguishing tank; (21) Desulfurization tower; (22) Compressor; (23) Filter; (30) First cooler; (32) Second cooler; (40) Absorption module (PSA); (61) Concentration sensing module; (62) Temperature sensing module; (AA) Impurity gas; (BB) CO_2, a part of CH_4; (CC) Bio-methane; (DD) Storage tank; (EE) Recirculation