Grate bar

Abstract

A grate bar for combustion systems, having a substantially closed surface facing the combustion side, a rear support region designed to be placed on a grate carrier for forming the grate, and a front nose region, which is rounded between the surface and front edge and has a bearing surface designed on the lower face and further has cooling fins for air cooling which protrude from the lower face of the surface forming the grate. A head part in the interior has at least regionally thickened head fins for air cooling in the longitudinal direction and vertical direction below the surface facing the combustion side. The grate bar can also be a reversible grate bar.

1 - 13 . (canceled) 
     
     
         14 . A grate bar for incinerators, comprising:
 a substantially closed surface on a combustion side;   a rear support area configured to be placeable on a grate carrier to form the grate;   a front with a rounded nose between the closed surface and a leading edge, and with a bottom side having a support surface;   cooling ribs for air cooling arranged to project from a bottom side of the closed surface forming the grate; and   a head part that comprises head ribs for air cooling that extend in longitudinal and vertical directions of the grate bar underneath the combustion-side surface, at least certain parts of the head ribs being thicker than other parts of the head ribs.   
     
     
         15 . The grate bar according to  claim 14 , wherein the head ribs comprise at least two thickened parts arranged parallel to each other. 
     
     
         16 . The grate bar according to  claim 14 , wherein the head ribs comprise substantially trapezoidal and/or funnel-shaped and/or polygonal and/or wedge-shaped thickened parts 
     
     
         17 . The grate bar according to  claim 14 , wherein head slots are formed between a side wall and each of the head ribs. 
     
     
         18 . The grate bar according to  claim 14 , wherein the head slots form a funnel, which is arranged inside the head part, and the funnel leads to a tapered part of the head slot, and wherein the head slots are arranged between a lateral end wall and the extension-like head ribs, all of which together from a comb-like structure. 
     
     
         19 . The grate bar according to  claim 14 , wherein a forward third of the head ribs is thickened. 
     
     
         20 . The grate bar according to  claim 17 , wherein at least part of the side wall extending along the head part comprises a recess. 
     
     
         21 . The grate bar according to  claim 14 , further comprising a rear part provided with at least one long slot open toward the closed surface, and wherein the cooling ribs project into an interior of the rear part. 
     
     
         22 . The grate bar according to  claim 14 , wherein the grate bar is made of metal. 
     
     
         23 . The grate bar according to  claim 14 , wherein the grate bar is a reversible grate bar, with a rear nose and head part configured the same as the front nose and head part. 
     
     
         24 . A grate for use in a grate-firing chamber of an incinerator, comprising: a first transverse row; and a second transverse row following the first transverse row, each of said first and said second transverse rows having a grate bar according to  claim 14 , the grate bar in said first transverse row being arranged in the grate in movable fashion, and, the grate bar in said second transverse row being installed in stationary fashion. 
     
     
         25 . The grate according to  claim 24 , wherein the support surface of the grate bar overlaps the surface of a following grate bar in an offset, fish scale-like fashion. 
     
     
         26 . The grate according to  claim 24 , wherein several grate bars are arranged longitudinally parallel to each other in each row.