NOVELTY - Auto-oxidation internal heating-type steam reforming system is composed to form a hydrogen-rich reform gas by steam reforming by auto-oxidation of raw material gas in the presence of oxygen. The system has a steam generating means, a first suction mixing means which gives a raw material-steam mixture by suction of the raw material gas in the steam flow from the steam generating means, and a reforming means.    USE - Used as an auto-oxidation internal heating-type steam reforming system for supplying reformed gas to a fuel cell.    ADVANTAGE - The hydrogen concentration in the reformed gas is made less than N2 and CO2 in anode exhaust gas. The flow speed of reformed gas in the fuel cell is made higher. Lowering of electricity generation efficiency is prevented.    DETAILED DESCRIPTION - Auto-oxidation internal heating-type steam reforming system is composed to form a hydrogen-rich reform gas by steam reforming by auto-oxidation of raw material gas in the presence of oxygen. The system has a steam generating means which includes a heating part for heating an air-fuel mixture obtained by mixing air and fuel and produces hydrogen by heating water with the combustion gas, a first suction mixing means which gives a raw material-steam mixture by suction of the raw material gas in the steam flow from the steam generating means, and a reforming means which oxidizes the raw material gas in the mixture with oxygen-containing gas supplied from outside and produces hydrogen-rich reformed gas by performing steam reforming of the raw material gas with the reaction heat from oxidation.    DESCRIPTION OF DRAWING(S) - Figure 1 shows the process flow diagram of an auto-oxidation internal heating-type steam reforming system.    Reforming means (1)    Steam generating means (2)    Combustion part (2a)    CO reduction means (3)    Suction mixing means (4)    Mixing means (5)    Suction mixing means (6)    Compressed air supply system (7)    Raw material supply system (8)    Flow removal means (9)    Water tank (10)    Heat exchanger (12)    Heat exchanger (13)    Control means (14)    Valve (31)    Valve (32)    Valve (33)    Flow regulator (33a)    Valve (34)    Valve (36)    Valve (37)    Valve (38)    Valve (39)    Water level detector (40)    Pressure detector (41)    Temperature detector (42)    Package structure (80)    Piping (101)    Piping (102)    Piping (103)    Piping (104)    Piping (105)    Piping (106)    Piping (107)    Piping (110)    Piping (111)    Piping (112)    Piping (113)    Piping (114)    Fuel cell (300)