NOVELTY - Removing exhaust gas (7) containing oxidizable pollutants involves introducing an exhaust gas (7) that contains oxidizable pollutants into a flue gas system (K) at a suitable location (a) that corresponds to a process oven (D); and mixing it with hot, oxygen-containing flue gas that flows through the flue gas system, where the exhaust gas (7) that contains oxidizable pollutants is heated to at least 600 degrees C.    USE - For removing exhaust gas containing oxidizable pollutants e.g. hydrogen and/or carbon monoxide and/or methane and/or methanol and/or organic acids and/or ammonia in steam-reforming processes forming synthesis gas from natural gas and water vapor (claimed).    ADVANTAGE - In the prior art methods, the exhaust gases were burned in, for example, an excess gas burner or they were completely condensed and then fed to a process for removal, making the method expensive and cost-intensive. The present method overcomes this problem, as it provides sufficiently long dwell times and an adequately high oxygen concentration, under which the oxidizable pollutants are converted into harmless substances, such as water and carbon dioxide, and released into the atmosphere together with the flue gas from the process oven. The pollutants can also then be oxidized at the required temperatures if they are present in low concentrations in the flue gas. The process either completely degrades the pollutants, or at least reduces them to the point where the pollutant concentrations in the flue gas or in the mixture of substances that is formed from the flue gas and exhaust gas do not exceed the legal boundary values. The device comprises a mixing device, by which the exhaust gas that contains pollutants can be mixed quickly and intensively with the flue gas. By the intensive and quick mixing, it is achieved that a sufficiently large portion of the pollutant molecules comes into contact with the reactants that are necessary for the degradation reaction and are degraded. The method is also quite safe with respect to emissions.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following    (1) an apparatus for removal of exhaust gas (7) containing oxidizable pollutants, comprising: a flue gas system (K) connected to a process oven (D), where the flue gas system has a first inlet for introducing hot, oxygen-containing flue gas discharged from the process oven, and a second inlet at a suitable location (a) for introducing an exhaust gas (7) containing oxidizable pollutants and further comprising a mixing device, by which the exhaust gas (7) containing pollutants can be quickly and intensively mixed with the flue gas; and    (2) a steam-reforming process involving introducing a mixture of natural gas and water vapor into a synthesis gas unit comprising a distributor, collector, catalyst-filled reactor pipes connected to the distributor and collector, a process oven having a burner (B) and a radiation zone (S) for heating the catalyst-filled reactor pipes, and a flue gas system (K), where the mixture of natural gas and water vapor is introduced into the distributor, flows through the reactor pipes where it is reacted to form a synthesis gas containing hydrogen and carbon monoxide, and is collected in the collector, and the fuel is burned with air in the burner B to produce a heated flue gas for heating the catalyst-filled reactor pipes in the radiation zone (S), and the flue gas is discharged at above 1000 degrees C from the radiation zone (S) into the flue gas system (K), delivering the synthesis gas to a cooler (E2) where the synthesis gas is cooled to below the water dew point, thereby forming a gas fraction (4) containing carbon monoxide and hydrogen, and process condensate (5), delivering the process condensate (5) which contains dissolved nitrogen to a stripping column which functions as a degasser (G) that is designed as a stripping column, introducing low-pressure water vapor into the stripping column as a stripping gas, and removing from the stripping column an exhaust gas comprising gas components and water vapor stripped from the process condensate (5), and introducing the exhaust gas from the stripping column into the flue gas system downstream of the radiation zone (S) at a point where the exhaust gas is heated to more than 600 to less than or equal to 1050 degrees C.    DESCRIPTION OF DRAWING(S) - The figure shows a view of a cutaway from a synthesis gas unit employing the exhaust gas removal process and apparatus.    Carbon monoxide and hydrogen fraction (4)    Process condensate (5)    Exhaust gas (7)    Burner (B)    Process oven (D)    Cooler (E2)    Degasser (G)    Flue gas system (K)    Radiation zone (S)