Flameless thermal oxidizer for oxidizing gaseous effluent streams containing hydrogen gas

A method for oxidizing a waste stream containing hydrogen therein, comprising:

• providing a first flow path for the waste stream containing hydrogen;
• providing a second flow path for the oxidant stream;
• introducing at least a portion of the waste stream containing hydrogen into an oxidant stream for mixing said waste stream and said oxidant stream in proportions to provide a mixture which is below the lower flammability limit of hydrogen to permit flameless oxidation of the mixture and without exceeding concentration parameters of the lower flammability limit and flame speed necessary for flameless oxidation of the mixture;
• and
• introducing the mixture into a ceramic matrix bed of a flameless thermal oxidizer maintained at a temperature above auto-ignition temperature of the mixture;
• wherein the first and second flow paths are provided within a dip tube assembly that extends into the ceramic matrix bed, and the dip tube assembly comprises an outlet through which the mixture is introduced into the ceramic matrix bed, and
• the dip tube assembly further comprises a first pipe and a second pipe that extends along the interior of the first pipe, wherein the first pipe provides the second flow path for the oxidant stream and the second pipe provides the first flow path for the waste stream containing hydrogen.