NOVELTY - A raw gas (14) containing hydrogen sulfide, ammonia or carbon dioxide, and hydrogen (H2), carbon monoxide (CO) or methane, is reacted with slaked lime aqueous solution or lime dispersion liquid. A byproduct gas containing calcium sulfide, calcium carbonate or ammonium hydroxide as main component, and a fuel gas containing H2, CO or methane as main component are produced, and raw gas is purified.    USE - For purifying raw gas used for producing fuel gas containing hydrogen, carbon monoxide or methane.    ADVANTAGE - The method enables the purification of gas harmful with respect to human body. The increase of calorie per unit weight of fuel gas is enabled. The deposits produced during purification of raw gas are recycled as plaster or fertilizer.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for refiner (10). The refiner has a sealed reaction container (13) having raw gas inlet (13a) and fuel gas exit (13c), blowing-in unit (11) for blowing raw gas (14) into reaction container through raw gas inlet, and stirring unit (21) for carrying out reaction of blown raw gas and slaked lime aqueous solution or slaked lime dispersion liquid stored in container (13). The byproduct containing calcium sulfide, calcium carbonate or ammonium hydroxide is produced in the lower portion of reaction container. The fuel gas having hydrogen, carbon monoxide or methane as main component is purified in the top portion of reaction container.    DESCRIPTION OF DRAWING(S) - The figure shows a block diagram of refiner used for purifying raw gas. (Drawing includes non-English language text).    Refiner (10)    Blowing-in units (11,12)    Reaction container (13)    Raw gas inlet (13a)    Fuel gas exit (13c)    Raw material (14)    Slaked lime dispersion liquid (16)    Stirring units (21,22)    Raw gas route (27)    Fuel gas route (28)    Nozzles (31,32)    Dehumidification unit (33)    Byproduct processing container (36)    Oxidizing gas inlet (36b)    Decarboxylation unit (43)    Polymer film (43b)