Back to results
US 5,687,657 AGranted
Method of and device for reducing the dust content of the exhaust gases of a steam generator
AssigneeAsea Brown Boveri AG
InventorGeoarg Ziegler
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeAsea Brown Boveri AG
InventorGeoarg Ziegler
Estimating the term…
In a method of and a device for reducing the dust content of the exhaust gases (18) of a steam generator which consists of a combustion chamber (1), a radiation part (2) and a convection part (3) and has at least two vertical gas passes (4, 5), the dust portion of the exhaust gases (18) is reduced before the exhaust gases (18) enter the convective part (3) of the steam generator. The front wall (7) and/or the rear wall (8) of the steam generator is of double-sided design in the region of the gas deflection from the vertical pass (4) having downward flow to the vertical pass (5) having upward flow, the outer wall (12) consisting of a known gastight tube-web-tube construction (13) and the inner wall (14) consisting of tubes (15) which are arranged in such a way that an intermediate space (16) through which flow can occur is present in each case between the tubes (15), a flow-stabilized zone (17) being defined by the outer wall (12) and the inner wall (14), and the inner (14) and the outer wall (12) being cooled by means of cooling fluid flowing through the tubes.
A method of reducing the dust content of the dust-laden exhaust gases of a steam generator which consists of a combustion chamber, a radiation part and a convection part and has at least two vertical gas passes, wherein the dust portion of the exhaust gases is reduced before the exhaust gases enter the convective part of the steam generator, the separation of the dust being improved in the region of the gas deflection from the vertical pass having downward flow to the vertical pass having upward flow by creating flow-stabilized stabilized zones, and the dust being discharged from this region by way of an opening.
A device for reducing the dust portion of the exhaust gases of a stem generator, the steam generator comprising a combustion chamber, a radiation part and a convection part including a from wall and a rear wall and having at least two vertical gas passes which are separated from one another by a dividing wall, and the steam generator having an opening for the dust discharge in the region of the gas deflection from the vertical pass having downward flow to the vertical pass having upward flow, wherein the from wall and/or the rear wall of the steam generator is of double-sided design in the region of the gas deflection from the vertical pass having downward flow to the vertical pass having upward flow, the outer wall comprising a gastight tube-web-tube construction and the inner wall comprising tubes which are arranged with an intermediate space through which flow can occur between the tubes, a flow-stabilized zone being defined by the outer wall and the inner wall, and the inner and the outer wall being cooled by means of cooling fluid flowing through the tubes.
Dependencies are inferred from the claim text.