FURNACE AND PROCESS FOR SYNTHESIS GAS PRODUCTION

A furnace for gas fields, for refineries, for petrochemical plants, for hydrogen production by gasification and for reforming comprising: - a radiant zone, - a convective zone, - a first and at least a second series of pipes through which at least two segregated process gas flows respectively pass, wherein: • The first process flow enters said furnace at the convective zone and, flowing through said first series of pipes leaves said furnace at the radiant zone, or alternatively, said first process flow enters said furnace at the radiant zone and, flowing through the first series of pipes, leaves the furnace at the radiant zone; • The second process flow, enters said furnace at the convective zone or at the radiant zone and, flowing through said second series of pipes, leaves said furnace at the radiant zone; • Said second series of pipes is made of a material resistant to acid gases.