Incineration grate with internal cooling

A grate for a firing plant comprising:

• at least one grate track including a plurality of fixed and moving rows of grate-lining units, said fixed and moving rows alternating in a longitudinal direction of the grate along the track, said rows being bound on each side by a side wall, and each said row comprising at least one grate-lining unit provided with feed and discharge lines and with cooling passages,
• each of the grate-lining units being pivotably connected at a rear portion of each of the grate-lining units to a fixed or movable grate-lining bearer and being movably arranged with a front portion on or above an adjacent grate-lining unit, and
• said at least one grate-lining unit in each said row being connected by connecting means, said connecting means arranged below said at least one grate-lining unit, such that adjacent grate-lining units are pivotable to a limited extent relative to a respective said grate-lining bearer and the cooling passages are arranged transversely to the longitudinal direction of the grate,
• wherein the cooling passages are tubes arranged in a meander shape and integrally cast in the grate-lining units, the tubes being variably spaced from each other in the longitudinal direction of the grate so as to be adapted to a predetermined thermal loading on the grate.