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US 2012/0269705 A1Published application
System for selective catalyst reduction
AssigneeDansk Teknologi Produktionsaktieselskab
InventorsAnders E. Jensen, Anders Færch Weiss, Andreas Aabroe Gamborg, Steen Kähler, Snorre Krogh Biehe
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Abstract
The invention relates to a system and method for selective catalyst reduction (SCR), where the addition of reducing agent is administered by a control portion and injected into a gas by an injection portion upstream of a catalyst portion. In some embodiments of the invention the injection portion comprises a plurality of injection nozzles.
Claims17
A system for selective catalyst reduction, comprising:
- a. an inlet of a gas to be catalytically reduced,
- b. a control portion to administer an amount of reducing agent to be mixed with the gas to be catalytically reduced,
- c. a doser portion that measures out the amount of reducing agent administered by the control portion,
- d. an injection portion that injects the reducing agent into the gas to be catalytically reduced upstream of,
- e. a catalyst portion that reduces the gas to be catalytically reduced to a reduced gas, and
- f. an outlet of the reduced gas, wherein the injection portion comprises a plurality of injection nozzles and the injection nozzles are adapted to atomize the reducing agent without the need for compressed air to facilitate the atomization.
3 more elements
2-18. (canceled)
A method for selective catalyst reduction of a gas to be catalytically reduced comprising:
- providing a system for selective catalyst reduction that comprises:
- (a) an inlet of a gas to be catalytically reduced,
- (b) a control portion to administer an amount of reducing agent to be mixed with the gas to be catalytically reduced,
- (c) a doser portion that measures out the amount of reducing agent administered by the control portion,
- (d) an injection portion that injects the reducing agent into the gas to be catalytically reduced upstream of,
- (e) a catalyst portion that reduces the gas to be catalytically reduced to a reduced gas, and
- (f) an outlet of the reduced gas, wherein the injection portion comprises a plurality of injection nozzles and the injection nozzles are adapted to atomize the reducing agent without the need for compressed air to facilitate the atomization;
- administering an amount of a reducing agent to be mixed with the gas to be catalytically reduced;
- measuring out the amount of reducing agent to be mixed with the gas to be catalytically reduced;
- and
- injecting the reducing agent into the gas to be catalytically reduced upstream of a catalyst portion that reduces the gas to be catalytically reduced to a reduced gas.
8 more elements
Dependencies are inferred from the claim text.