NOVELTY - A biogas purifying and potting device comprises devulcanizer (2), where the inlet end is connected with a biogas storage pot (1), and the outlet end is connected with carbon dioxide (CO2) absorption tower (3), dryer (8), compressor (20), methane absorption reactor (16), methane absorption tower (9), compressor (17), saturated methane solution storage pot (14), potting pipe (21), methane absorption packing layer (10), methane absorption liquid pot (11), solvent storage pot (12) and latent solvent storage pot (13).    USE - The biogas purifying and potting device is used for removing impurities of biogas.    ADVANTAGE - The biogas purifying and potting device is capable of removing the impurities such as hydrogen sulfide (H2S) and CO2 which affect the biogas burning value and finishing the absorption reaction to biogas through low pressure compression; the low pressure storage and potting of biogas are achieved; and the application area of biogas is expanded.    DETAILED DESCRIPTION - A biogas purifying and potting device comprises devulcanizer (2), where the inlet end is connected with a biogas storage pot (1), and the outlet end is connected with the inlet end of a CO2 absorption tower (3); outlet end of the CO2 absorption tower is connected with the inlet of a dryer (8) through compressor (20); outlet end of the dryer is connected with the inlet end of a methane absorption reactor (16) at the bottom of a methane absorption tower (9) through compressor (17); outlet of the methane absorption reactor is connected with the inlet end of a saturated methane solution storage pot (14); outlet of the saturated methane solution storage pot is connected with a potting pipe (21); there is a methane absorption packing layer (10) in the middle of methane absorption tower; upper part of the methane absorption tower is connected with the outlet end of a methane absorption liquid pot (11); inlet end of the methane absorption liquid pot is connected with the outlet ends of a solvent storage pot (12) and a latent solvent storage pot (13).    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic diagram of the biogas purifying and potting device.    Biogas storage pot (1)    Devulcanizer (2)    CO2 absorption tower (3)    Dryer (8)    Methane absorption tower (9)    Methane absorption packing layer (10)    Methane absorption liquid pot (11)    Solvent storage pot (12)