Countercurrent shaft-drawer type drying machine with movable drawer for drying agglomerations with low mechanical strength

Abstract

The invention relates to a countercurrent shaft-drawer type drying machine with a movable drawer for drying agglomerations with low mechanical strength, comprising a vertical, preferably, rectangular shaft (1), wherein the shaft comprises a top part, at least one layer, preferably, two layers of material inlet regions (2), a multi-layer drying region (3) preferably comprising two to six layers and a bottom part, and at least one layer, preferably, two layers of material outlet regions (4); an outlet short pipe or an outlet current collector (5) of dry gas is arranged between the material outlet region (4) at the bottom and the drying region (3); an outlet short pipe or an outlet current collector (6) of wet gas is arranged between the drying region (3) and the material inlet region (2) at the top; baffles (8) of the material inlet region (2) and baffles (10) of the material outlet region (3) are made of numerous rectangular non-perforated metal sheet plates; baffles (9) of the drying region (3) are made of numerous rectangular perforated metal sheet plates; and the baffles (8, 9, 10) made of the rectangular metal sheet plates are connected to parallel pins (11) which are rotationally arranged in the wall of the shaft (1) and are transverse to a shaft line of the shaft (1) along long edges of the baffles.

Description

technical field [0001] The invention relates to a countercurrent shaft-drawer dryer with a movable drawer for drying agglomerates of low mechanical strength. Background technique [0002] A number of processes are known, one of which is the drying of agglomerated raw materials, the particles of which exhibit low mechanical strength, before further processing in their route. This is the case, for example, in the manufacture of agglomerates sintered from power plant cinders for the construction and road construction industries. When aggregates are produced by sintering on a sintering belt (like the Lytag technology), the fresh granulated raw material poured from the granulation plate is actually poured directly onto the sintering belt, where without any further pouring action, they successively drying and sintering. In this way, so to speak, the problem of drying operation is bypassed. However, if the same process uses the energy contained in the raw material in this proces...

AI Technical Summary

Problems solved by technology

However, belt dryers are relatively large in size, they consist of many moving parts, wear out quickly, and are difficult to insulate to reduce heat loss

Furthermore, for example with LSA technology, direct delivery of hot pellets from a self-contained dryer to a rotating parallel oven would be difficult due to process issues and space requirements

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