Regenerative heat exchange systems and refractory bricks therefore

DETAILED DESCRIPTION Generally stated, the present invention contemplates tubular refractory bricks having their end surfaces formed in such a manner that the bricks can be set in parallel rows, and layers of rows can be stacked one upon another in interlocking arrangement for producing a mechanically stable checker structure having a high thermal efficiency.
More particularly, the specially configured refractory member comprises a prismatic tubular brick having mirror image end surfaces, with a central passage extending longitudinally therethrough.
Each tubular refractory brick includes two pairs of opposed side walls, adjacent longitudinal edges of the side walls being interconnected in substantially square relation in cross section by angularly disposed corner portions.
The central areas of the top and bottom, or end, surfaces of each side wall are provided with longitudinally aligned concave recesses.
For stacking the bricks in setting the checkers, the top and bottom surfaces of the corner portions are adapted to engage the corner portions of adjacent vertically aligned bricks, or to be received in the aforementioned recesses of offset or staggered bricks for interlocking the bricks one to another.
OBJECTS AND ADVANTAGES An object of the invention is to provide a refractory brick of novel configuration for assembly of a mechanically stable checkerwork structure.
Another object of the invention is to provide a specially shaped refractory brick which is adapted to interlock with similarly shaped refractory bricks for producing checkerwork structures of high thermal efficiency.
Other objects and advantages of the invention will become more apparent during the course of the following description, when taken in connection with the accompanying drawings.