Method for influencing the heat flux density on the walls of the reaction tubes in a reformer

摘要

The present invention relates to a method for influencing the heat flux density at the walls of reaction tubes (2) in a reformer (3), in the fuel gas (8) and air (9) is fed, wherein the reformer (3) with an enclosed by a circumferential wall of the furnace chamber (5), as well as at least one burner (6) on the furnace cover (7) and a plurality of vertical, parallel reaction tubes (2) is provided, wherein hot exhaust gas (13) according to the bottom of the furnace chamber (5) is carried out in this case, the filled with catalyst and reaction tubes (2), which is heated from above with a hydrocarbon-containing gas and water vapor are acted upon, whereby in the tubes (12) through the catalyst is an endothermic cleavage of the hydrogen from the hydrocarbons by the heating by the flames arising and hot exhaust gases (13) in the case of an outlet pressure in the furnace chamber (5) of over 200 kpa is brought about. In order to further develop the method in such a way that the heat distribution in the furnace chamber (5) and the heat transfer to the reaction tubes (2) is strongly improved, the invention provides that, both a part of the fuel gas (8), the greater than 60%, as well as a portion of the air (9), the greater than 60%, in a respective angle of at least 30 ° with respect to the vertical (10) of the furnace roof (7), into the furnace chamber (5) is fed.