PURPOSE: To produce substitution gas of natural gas, which can utilize as fuel gas for various uses, by treating de-CO, de-S after removing dust in oxygen blast furnace gas and removing the impurities by reaction of adjusted H2/CO ratio.
CONSTITUTION: After removing the dust in the oxygen blast furnace gas 1 obtd. from the furnace top of oxygen blast furnace 10 by a rough dust collector 2, a part of the gas is used to preheating of raw material charged in the oxygen blast furnace 10. After the remaining part of gas is treated by supplying successively to de-S mechanism 5 and de-CO mechanism 6 through a pressurized sending mechanism 10, H2/CO ratio is adjusted by H2 source introducing device 16. Next, after reacting the gas by supplying to a reaction tower 8 through the pressurized rising mechanism 7, it is supplied to an impurity remover 15 through a cooler 9, to remove the impurities and make the production gas 11. In this way, the substitute fuel gas having about 10,000W11,000kcal/Nm3 is obtd.
KITAJIMA KAZUTSUGU
WATANABE TOSHIO
