NOVELTY - A fuel gas refinery processing installation comprises pyrolysis unit that removes thermally-decomposable impurity from source gas by circulating source gas to a hot heating flow path, halide fixing unit that fixes halide by blowing in a halide absorber into source gas, physical filtration unit that removes fixed halide by physical filtration, adsorption removal unit that circulates source gas and makes heavy metals be adsorbed to adsorption agent, and catalyst conversion unit that circulates source gas to carry out chemical alteration according to catalyst and remove halide and sulfide.    USE - Fuel gas refinery processing installation used in producing refined fuel gas used as fuel for high temperature fuel cell, molten carbonate type fuel cell (claimed), gas combustion boilers, combustion, gas engines or gas turbines, or as source gas for chemosynthesis.    ADVANTAGE - Removes impurities contained in source gas by dry process, and produces refined fuel gas with very high purity degree.    DETAILED DESCRIPTION - A fuel gas refinery processing installation comprises pyrolysis unit that removes thermally-decomposable impurity from source gas by circulating source gas to hot heating flow path, halide fixing unit that fixes halide by blowing in a halide absorber into source gas where impurity is removed by pyrolysis unit, physical filtration unit that removes fixed halide by physical filtration, adsorption removal unit that circulates source gas and makes heavy metals be adsorbed to adsorption agent, and catalyst conversion unit that circulates source gas to carry out chemical alteration according to catalyst and remove halide and sulfide. An INDEPENDENT CLAIM is included for an operating method of fuel gas refinery processing installation.    DESCRIPTION OF DRAWING(S) - The drawing shows a block diagram of the fuel gas refinery processing installation. (Drawing includes non-English language text).    Combustion chamber (13)    Honeycomb body (15)    Air preheater (16)    Bag filter (18)    Booster (19)