Water-cooled grate block for an incinerator
A cooled grate block as part of a grate for a system for thermally treating waste, including: a block body in the form of a cast part having an outer supporting face for the waste to be treated; a flat cavity situated directly below the supporting face, for receiving a cooling fluid; a fluid feed line and a fluid discharge line, which are connected to the cavity; at least one deflection element, which is arranged in the cavity to direct a cooling fluid within the cavity from the fluid feed line to the fluid discharge line; and a valve element situated in the end region of the cavity, for distributing the cooling fluid fed into the cavity through the fluid feed line.
1 . A cooled grate block as part of a grate for an installation for thermally processing waste, wherein the grate blocks are arranged in a step-like manner one above the other and configured in such a manner in order to rearrange and convey combustion material during combustion via pushing movements which are carried out relative to each other, comprising
a block member which is in the form of a cast component and which has an upper wall which forms an external support face which extends at least partially parallel with a longitudinal axis of the block member for the waste which is intended to be processed,
a planar hollow space which is arranged directly under the support face for receiving a cooling fluid and which is delimited at the upper side by the upper wall, at the front by a front wall, at the bottom by a base, at the rear by a rear wall and laterally by side walls, wherein the base is at least partially formed by a base plate,
a fluid supply line and a fluid discharge line which are connected to the hollow space,
at least one redirection element which is arranged in the hollow space in order to redirect a cooling fluid in the hollow space from the fluid supply line to the fluid discharge line, and
a distributor element, which is arranged in a front region of the hollow space, in order to distribute the fluid which is introduced through the fluid supply line into the hollow space.
2 . The grate block as claimed in claim 1 , wherein the distributor element extends at least partially along a width axis which extends at least approximately parallel with the front wall.
3 . The grate block as claimed in claim 1 , wherein the planar hollow space is connected to a front chamber which extends substantially parallel with the front wall and by which the cooling fluid supply to the planar hollow space or the cooling fluid discharge from the hollow space is brought about.
4 . The grate block as claimed in claim 3 , wherein the planar hollow space and the chamber are connected to each other via a plurality of supply openings.
5 . The grate block as claimed in claim 4 , wherein the distributor element is located in an opening region of at least one of the supply openings.
6 . The grate block as claimed in claim 1 , wherein the planar hollow space has a dividing wall which extends from the base to the upper wall and which extends from the front wall in the direction of the rear wall of the hollow space and which forms a passage in the region of the rear wall and which subdivides the hollow space into two compartments which are connected in a fluid-conducting manner.
7 . The grate block as claimed in claim 6 , wherein the dividing wall has an opening in the region of the front wall in order to ventilate the hollow space or the compartments which are produced by the dividing wall.
8 . The grate block as claimed in claim 6 , wherein the dividing wall extends at least approximately parallel with one of the side walls.
9 . The grate block as claimed in claim 1 , wherein the fluid supply line and the fluid discharge line are connected in the region of the front wall to the planar hollow space.
10 . The grate block as claimed in claim 1 , wherein the distributor element is in the form of a boss, aperture, perforated plate or transverse bar which extends at least approximately parallel with the front wall.
11 . The grate block as claimed in claim 1 , wherein the distributor element comprises a projection which limits or redirects the flow of the cooling fluid out of the fluid supply line.
12 . The grate block as claimed in claim 1 , wherein the distributor element is constructed so that it allows only a limited throughflow of cooling fluid past the distributor element in order to allow a uniform distribution of the cooling fluid inside the hollow space.
13 . The grate block as claimed in claim 1 , wherein the upper wall and/or the front wall has at least one air supply opening.
14 . The grate block as claimed in claim 1 , wherein the block member is produced integrally as a cast component and the base plate is welded to the block member in order to delimit the hollow space.
15 . The grate block as claimed in claim 1 , wherein the hollow space extends over at least ⅔ of the length and/or over at least ¾ of the width of the support face.
16 . A grate comprising a plurality of grate blocks as claimed in claim 1 .