Patent ID: 8572863

Claim:
A bulk material dryer, comprising: a vertical dryer chute including plural modules placed above one another; and a plurality of air intake roofs and air exhaust roofs disposed inside the vertical dryer chute in parallel and horizontally aligned, wherein the air intake roofs and air exhaust roofs are disposed in plural planes above one another, wherein the roofs are disposed offset in face view in the planes, so that a rhomboid pattern with only diagonally extending gridlines is formed, wherein the air intake roofs and the air exhaust roofs are respectively disposed on diagonal lines, wherein only one type of the air intake roofs or the air exhaust roofs is disposed on the diagonal lines of one direction, and both types of the air intake roofs and the air exhaust roofs are disposed in an alternating manner on the diagonal lines of the other direction, wherein the air intake roofs and the air exhaust roofs of a particular type are arranged offset towards a same side in at least one plane relative to another of the air intake roofs or the air exhaust roofs of the same type disposed above, and wherein the offset is provided in a transversal direction by an additional offset which corresponds to a fraction of a material flow width.