PURPOSE: To produce hydrogen at a low cost by the efficient partial oxidation of heavy hydrocarbon while saving energy and eliminating carbon trouble by utilizing a coke dry-quenching equipment used in the manufacture of coke as a gas producer.
CONSTITUTION: The temp. of the prechamber 2 of a gas producer 1 is kept at about 920-980oC. Heavy hydrocarbon such as petroleum asphalt is preheated with a preheater 4 and introduced into the prechamber 2. At the same time, O2 is blown into the prechamber 2 by a larger volume than the volume of O2 required by a reaction represented by equation I , and the reaction temp. is kept at about 1,000-1,100oC. An excess of O2 prevents a drop in temp. due to the endothermic reaction represented by the equation I by an exothermic reaction represented by equation II. In the cooling chamber 3, endothermic reactions represented by equations III, IV are caused by blowing steam to accelerate the cooling of lump coke. Gas produced by the partial oxidation of the heavy hydrocarbon is fed to a boiler 6 through a dust collector 5 to recover the sensible heat. The gas is desulfurized in a desulfurizer 9 and introduced into a pressure swing adsorber 10, where H2 is separated.