The first full-scale mesh belt dryer was manufactured and tested in Arizona in 1991. These belt dryers used a mesh belt and had a permanent support under the belt. The continuous visit included one diagonal support under the belt, and the belt was also pulled through a chamber with downward drying, in other words, heated dry air was blown over the cotton, and the treated air passed through the cotton to the sellers under the cotton. In this scenario, supports included a diagonal support extending from one side of the chamber to the other. The edge of the wire belt was supported by an auxiliary flange running along the sides of the chamber and held in place by a retaining flange extending above the auxiliary flange along the sides of the chamber.
The exhaust ducts under the belt had a circular cross-section with all its inlets at the bottom. The bottom of the mesh belt dryer rested against the bottom of the chamber along with a cross conveyor around the inlet end of the chamber to remove debris that would be caught on this end of the bottom belt dragging along the bottom of the chamber. A second facility was opened in Texas in 1992. The Texas facility did not contain any additional attributes related to this program.
The present application discloses some improvements over the previous two experimental facilities. In particular, improvements have been made to allow for the separation of much more waste from the fiber material being processed. This is accomplished by intentionally bending the medium-modified mesh belt with the dryer. Bending the belt causes the fabric on the belt to agitate, allowing more waste to be discharged.
The mesh belt dryer flexes enough to cause some mass movement on the belt without agitation. The normal action of heated air drying is always to allow the heated air to pass through the mass of material and not around clumps of fibrous material. For example: when the flexing of the dryer’s mesh belt is so vigorous that the seed cotton separates into certain tufts, the air tends to move around the tufts. The seed cotton dries harder when the mass of material remains intact and the air moves through the tufts.
The mesh belt dryer frame includes an extended drying chamber 10. The drying chamber includes a manipulation air plenum 12 that extends adjacent the full top 14 of the chamber. The bottom of the plenum twelve is formed by a perforated ceiling 16 to evenly distribute the treated air through the plenum into the main chamber 18.
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