Grate Plates for Grate Coolers

Abstract

The invention relates to a grate (1) for use in a grate cooler for hot bulk material, having: the grate is alternately covered by at least one further grate when installed in the grate cooler the covered area (2); and the uncovered area (3) not covered by the additional grate (1) when the grate is used. According to the invention it is provided that the height (8) of the groove in the covered area is smaller than the height (7) of the groove in the uncovered area and that the bottom of the groove in the covered area is formed by a plurality of segments (9) The upper sides of these sections serve as support surfaces for the bulk material and gap-shaped cooling air ducts (10) are formed between these sections, the openings of the cooling air ducts existing between the upper sides of the individual sections respectively The orientation is angular to the vertical such that an acute angle exists in each case between the conveying direction of the bulk material and the direction of the flow of cooling air through the openings.

Description

technical field [0001] The invention relates to a grate for use in a grate cooler for hot bulk material, the grate having a second grate which is alternately covered by at least one further grate when the grate is installed in the grate cooler A working area (covered area), wherein the covered area has at least one groove for retaining bulk material as an autogenous wear protection layer, and the grate has a grate that is not affected by other components when the grate is installed in the grate cooler The second working area (uncovered area) covered by the grate plate, wherein the uncovered area has at least one groove for retaining loose material as a self-generated wear protection layer, the groove has at least one opening to the grate Openings on the underside of the plate for the introduction of cooling air. Background technique [0002] Grate coolers are used to cool hot bulk materials such as burnt mineral material or cement clinker discharged from a rotary tube furna...

AI Technical Summary

Problems solved by technology

In this case, this significantly increases the flow resistance or the strong pressure loss in the cooling air flow, which is not only expensive to compensate, but also in the overall supply of air to the grate cooler or the corresponding grate plate. Disadvantageously, in uncovered, less intense compression areas, (vertical) temperature gradients develop in the bulk material bed, which do not lead to optimal effective and uniform cooling of the conveyed loose material

Furthermore, with this necessitating an increased air velocity in the conveying area, there is a disadvantageous increase in the risk of penetration or the formation of cold aisles

Furthermore, it is also disadvantageous that cooling on the bottom of the groove in the covered area by means of cooling air through the usual openings leading into the underside of the grate is generally not sufficient to sufficiently reduce the especially temperature-dependent wear

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