PURPOSE:A mixed gas, resulting from pyrolysis of solid waste, is subjected to two-stage hydrogenation, dehydrochlorination, desulfurization, steam reformation, carbon monoxide conversion and other treatments in order, then steam and carbon dioxide are removed to produce high-calorie town gas without coking. CONSTITUTION:Solid waste is fed from the line 1 into the pyrolysis furnace 2 to effect pyrolysis at over 550 deg.C to form a gas containing hydrogen, carbon monoxide, carbon dioxide, hydrocarbons such as methane, inert gases, chlorides, sulfides. The gas mix is sent through the line 3 and cleaned with scrubber 4 and cleaning line 5, then stored in the holder 6. Then, first-step hydrogenation is conducted in the hydrogenator 12 by use of the hydrogen in the mixed gas at a lower temperature and the temperature is raised to effect the second-stage hydrogenation in the hydrogenator 14. The resultant gas is, further dehydrochlorinated and desulfurized in the columns 15 and 17 respectively, when necessary, subjected to steam reformation at low temperature, steam reformation at high temperature and carbon monoxide conversion to separate steam and carbon monoxide, thus producing the objective gas 18.
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