| 摘要 |
A method is disclosed for catalytic primary reformation of hydrocarbons with steam at elevated pressure by means of a split tube reactor and a firing chamber. In the split tube system which can use a catalyst material, hydrocarbons to be reformed are converted by water steam to synthesis gas. The split tube system is heated by a plurality of firing facilities between the split tubes which include a plurality of burners arranged in series, the burners generating mainly downwardly directed flames. The relevant firing facilities are supplied with fuel and air, with the air being withdrawn from the relevant feeders. The flue gas thus evolving passes through the firing chamber from top to bottom and enters in the lower area of the firing chamber into horizontally arranged ceramic flue gas tunnels extending in parallel to each other and perpendicular to the vertical split tubes and being allocated to one firing facility each. The flue gas enters through apertures in the lateral walls of the flue gas tunnels. The flue gas at the exit of the firing chamber is passed into heat recovery devices. In each flue gas tunnel an additional gas is fed into the tunnel's front side, in flue gas flow direction, wherein the gas containing oxygen and a non-combustible gas, so that the additional gas passes the flue gas tunnels over the entire length of the firing chamber. The volume of the additional gas passed into the flue gas tunnels is regulated. |
