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AssigneeALSTOM Technology Ltd
InventorGisbert Kaefer
Estimating the term…
A gas stream containing e.g. molecular hydrogen is used for the regeneration of a catalyst for NOx and SO2 removal from the flue gas of a gas turbine. In order to reduce the consumption of regeneration gas, the gas inlet is located between the SCOSOx catalyst (2) and the SCONOx catalyst (3). The regeneration gas leaves the catalyst chamber upstream of the SCOSOx catalyst and is recycled. For the regeneration of the SCONOx catalyst and to keep SO2 containing gas from entering the SCONOx catalyst, a second regeneration gas inlet is located downstream of the SCONOx catalyst. The regeneration gas entering the catalyst chamber through this port passes the SCONOx (3) and the SCOSOx catalyst (2). The direction of the flow in the SCONOx catalyst can also be reversed. In another example, regeneration gas outlets are located both upstream of the SCOSOx and downstream of the SCONOx catalyst. But, only the regeneration gas from the SCONOx catalyst is recycled.
Process for the regeneration of a catalyst plant with a SCOSOx catalyst (2) for the removal of SO2, and arranged downstream thereof, a SCONOx catalyst (3) for the removal of NOx, from the flue gas of a gas turbine, in which regenerating gas containing molecular hydrogen or hydrocarbons is conducted through the SCOSOx catalyst (2) and the SCONOx catalyst (3), wherein regenerating gas is extracted upstream of the SCOSOx catalyst (2) or between the SCOSOx catalyst (2) and the SCONOx catalyst (3), and extracted regenerating gas is introduced again between the SCOSOx catalyst (2) and the SCONOx catalyst (3) or upstream of the SCOSOx catalyst (2), while fresh regenerating gas is introduced downstream of the SCONOx catalyst (3).
Process for the regeneration of a catalyst plant with a SCOSOx catalyst (2) for the removal of SO2, and arranged downstream thereof, a SCONOx catalyst (3) for the removal of NOx, from the flue gas of a gas turbine, in which regenerating gas containing molecular hydrogen or hydrocarbons is conducted through the SCOSOx catalyst (2) and the SCONOx catalyst (3), wherein regenerating gas is extracted downstream of the SCONOx catalyst (3) and is introduced again between the SCOSOx catalyst (2) and the SCONOx catalyst (3), while regenerating gas is likewise extracted and removed upstream of the SCOSOx catalyst (2).
Dependencies are inferred from the claim text.