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US 2013/0123564 A1Published application
Method and System for Stabilizing Volatile Radionuclides During Denitration at High Temperatures
OwnerJ. Bradley Masoninventor
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Abstract
Providing a method for eliminating NOx from an input waste form, including waste forms with volatile elements. The method includes adding the input waste form, reducing additives, a fluidizing gas, and mineralizing additives to a fluidized bed reactor. The reactor includes multiple portions and at least one portion is operated in a reducing atmosphere. The bed is operated at temperatures greater than 800° C.
Claims16
A method for removing nitrogen oxides, comprising the steps of:
- providing liquids, slurries, sludges or solid waste material containing the nitrogen oxides;
- providing a fluidized bed reaction vessel containing a reaction bed having a lower portion, a middle portion, and an upper portion;
- heating the fluidized bed reaction vessel to an operating temperature greater than 800° C.;
- and
- adding a fluidizing gas, a reductant, a mineralizing additive, and the waste material into the fluidized bed reaction vessel reaction bed, wherein the fluidizing gas is injected at a velocity that agitates the waste material and elutriates fine solids from the reaction bed;
- and
- operating at least the lower portion of the reaction bed under strongly reducing conditions sufficient to achieve low leaching of elements from the final waste form and to destroy substantially all of the nitrogen oxides in the waste material.
4 more elements
Dependencies are inferred from the claim text.