Waste heat boiler

Abstract

Waste heat boiler ( 1 ) being an elongated vessel comprising a co-axial positioned tubular channel ( 4 ) for hot gas, said channel further being provided with an inlet ( 11 ) for hot gas and an outlet for cooled gas, wherein a gas pathway ( 6 ) is defined between said inlet and outlet of said tubular channel and wherein in the gas pathway one or more bundles of tubular cooling surfaces are present, said tubular cooling surfaces ( 7 ) positioned co-axial with the channel, wherein the tubular channel is closed at one end ( 8 ), thereby forming a gas reversal chamber ( 9 ), and wherein the gas inlet is an opening in the wall of the tubular channel positioned between the gas reversal chamber and the gas pathway, wherein the inlet for hot gas is connected to an inlet conduit ( 11 ), which conduit is positioned under an angle α with said tubular channel and wherein at the hot gas inlet in the tubular channel a diverter plate ( 12 ) is present.

1 . A waste heat boiler comprising an elongated vessel comprising a co-axial positioned tubular channel for hot gas, said channel further being provided with an inlet for hot gas and an outlet for cooled gas, wherein
 a gas pathway is defined between said inlet and outlet of said tubular channel and wherein in the gas pathway one or more bundles of tubular cooling surfaces are present, said tubular cooling surfaces positioned co-axial with the channel, wherein   the tubular channel is closed at one end, thereby forming a gas reversal chamber, and wherein the gas inlet is an opening in the wall of the tubular channel positioned between the gas reversal chamber and the gas pathway, wherein the inlet for hot gas is connected to an inlet conduit, which conduit is positioned under an angle α with respect to said tubular channel and wherein   at the hot gas inlet in the tubular channel a diverter plate is present.   
     
     
         2 . A waste heat boiler according to  claim 1 , wherein the diverter plate is positioned under an angle β of between 5 and 45° with respect to the longitudinal axis of the tubular channel. 
     
     
         3 . A waste heat boiler according to  claim 1 , wherein the diverter plate is positioned under an angle β of between 10 and 25° with respect to the longitudinal axis of the tubular channel. 
     
     
         4 . A waste heat boiler according to  claim 1 , wherein the diverter plate is positioned under an angle β of 15° with respect to the longitudinal axis of the tubular channel. 
     
     
         5 . A waste heat boiler according to  claim 1 , wherein the diverter plate is positioned in the tubular channel such that two gas entry pathways are formed for the hot gas flowing towards the gas pathway, namely one via the gas reversal chamber and one via an opening directly connecting the gas inlet and the gas pathway. 
     
     
         6 . A waste heat boiler according to  claim 1 , wherein the diverter plate is provided with cooling means. 
     
     
         7 . A waste heat boiler according to  claim 6 , wherein the cooling means are one or more conduits having inlet and outlets for a cooling medium. 
     
     
         8 . A waste heat boiler according to  claim 2 , wherein the angle β can be altered. 
     
     
         9 . A waste heat boiler according to  claim 1 , wherein the diverter plate is provided with mechanical cleaning means. 
     
     
         10 . A waste heat boiler according to  claim 1 , wherein a blaster is present to clean the diverter plate. 
     
     
         11 . A waste heat boiler according to  claim 1 , wherein the surface of the diverter plate is provided with a layer of refractory or with cladding. 
     
     
         12 . A waste heat boiler according to  claim 5 , further comprising two additional gas entry pathways, one on the left and one on the right of the diverter plate.