Gasifier

Abstract

A method of constructing an inner thermal lining or jacket of a jacketed gasifer having an outer shell with an opening allowing access to an interior of the gasifer includes inserting jacket wall segments ( 40 ) into the gasifer interior through the opening, the jacket wall segments ( 40 ) each comprising an elongate jacket plate ( 42 ) with an annulus face ( 44 ) and a plurality of transversely extending longitudinally spaced stiffener formations ( 46 ) standing proud of the annulus face ( 44 ). The jacket wall segments ( 40 ) are arranged side by side leaving an aperture or space between adjacent jacket plates. The stiffener formations ( 46 ) of adjacent spaced jacket wall segments are welded together through the aperture or space between said adjacent spewed jacket wall segments, and the apertures or spaces with window plates ( 58 ).

1 - 10 . (canceled) 
   
   
       11 . A jacketed gasifier. which includes comprising:
 an outer shell or pressure vessel and an inner thermal lining or jacket defining a gasification zone, an annulus or jacket space for a coolant being defined between the outer shell and the jacket; and   circumferentially extending vertically spaced stiffener formations mounted to the jacket, in the annulus or jacket space.   
   
   
       12 . The gasifier as claimed in  claim 11 , in which the inner thermal lining or jacket includes a cylindrical jacket wall comprising jacket wall segments and jacket end components, with the jacket wall having a minimum thickness of less than  25  mm. 
   
   
       13 . The gasifier as claimed in  claim 11 , in which the stiffener formations are annular, comprising a radial flange on a cylindrical face of the jacket and an end flange arranged perpendicularly to the radial flange, i.e. concentric with and facing the cylindrical face of the jacket. 
   
   
       14 . The gasifier as claimed in  claim 13 , in which the radial flange is apertured to allow passage through the radial flange of a coolant flowing through the jacket space. 
   
   
       15 . The gasifier as claimed in  claim 14 , in which at least 25% of each radial flange is void. 
   
   
       16 . The gasifier as claimed in  claim 15 , in which at least 35% of each radial flange is void. 
   
   
       17 . The gasifier as claimed in  claim 11 , which is a fixed bed gasifier.