Back to results
US 7,063,817 B2Granted
Device for cleaning flue gas
AssigneeSiemens Aktiengesellschaft
InventorRalf Sigling
Life of this patent
Estimating the term…
Abstract
Flue gas, in particular from a steam generator, requires cleaning. A catalytic converter for deNOxing the flue gas, which is used, for example, to heat an air preheater, is often employed for this purpose. Residues of a reducing agent react with unconverted sulfur oxide and form a substance which damages the air preheater. To suppress this reaction, there is provided a first mixer for more uniformly mixing the flue gas with the reducing agent downstream of the catalytic converter, as seen in the direction of flow.
Claims12
A device for cleaning flue gas, comprising:
- a flue gas passage for conducting flue gas in a given flow direction;
- an apparatus for injecting an additive adapted to release a reducing agent in said flue gas passage;
- at least one catalytic converter including a last catalytic converter for reducing nitrogen oxides disposed in said flue gas passage;
- and
- a mixer for rendering a mixing of the flue gas with the reducing agent more uniform disposed downstream of said last catalytic converter in the given flow direction, wherein said mixer comprises a plurality of immovable lemellae, disposed obliquely with respect to a flow gas flow.
2 more elements
Dependencies are inferred from the claim text.