TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Method: Water vapor or water is sprayed with the modified gas containing carbon monoxide and hydrogen, and heated at 700 degreesC or less to produce a gas (3) rich in hydrogen, and thus hydrogen gas shift reaction is promoted using hydrogen gas shift reaction apparatus (W). The fuel gas generator and hydrogen generator generate gas rich in carbon monoxide or hydrogen, and a gas rich in hydrogen, respectively. The gas rich in carbon monoxide and hydrogen, or gas rich in hydrogen, is directly contacted with a heat-carrier oil, such as heavy oil. The produced coal tar fraction is condense-liquefied, and removed. The removed tar is recycled as a raw material to dry distillation device, reformer, fuel gas generator or hydrogen generator. The gas rich in carbon monoxide or hydrogen, or gas rich in hydrogen is indirectly contacted with water, and water vapor is generated. The obtained water vapor is supplied as heat energy required for dry distillation device, reformer, fuel gas generator or hydrogen generator.Preferred Arrangement: The reformer has a non-magnetic material, and has a coil on its external side and a magnetic substance at its internal side. High frequency current is applied to the coil, and the magnetic substance generates heat by electromagnetic induction. The dry distillation device is a cylindrical component rotating around an axis line, which inclines from horizontal surface. The distillation device is a vertical fluid bed, in which direct heating is carried out using super heated steam obtained by electromagnetic induction or electrical resistance heat.Preferred Apparatus: The hydrogen shift reaction apparatus is a non-catalytic hydrogen shift reaction apparatus, in which the gas rich in hydrogen is generated by cooling gas rich in carbon monoxide and hydrogen at 70-500 degreesC. The non-catalytic hydrogen shift reaction apparatus does not use a catalyst and water vapor. The non-catalytic hydrogen generator produces a gas rich in hydrogen by mixing a predetermined amount of water vapor with the carbonized gas without cooling, and using a catalyst.