| 摘要 |
Combustion heating apparatus for fluids of the kind in which the fluid is passed through a heated zone (15), which zone is heated by a combustion zone (20) to which air and fuel is fed. The invention is characterised in that said fluid is passed through the heated zone (14') in multipe substantially parallel streams, in that there is a heated zone for each stream, in that there is an associated combustion zone (20) for each heated zone, and in that the associated heated and combustion zones are preferably elongate and arranged one within another with a high degree of radial symmetry, preferably concentrically. Heat may be produced in a desired distribution in the combustion zones by introduction either of air or fuel, or both, through pores (5) or ducts in a combustion wall bounding said zones, and the combustion reaction may be stabilised close to this wall by turbulence-promoting projections. The apparatus may be for steam reforming, in which case an endothermic chemical reaction between steam and hydrocarbons is carried out in each heated zone to form hydrogen and oxides of carbon, which reaction may be promoted by catalytically active surfaces disposed within each heated zone. |
