| 摘要 |
An improvement is provided in a vertical malt drying kiln, including at least one vertical malt compartment having several flow zones for the drying air, the zones being one above the other and extending between an upper green malt feeding device and a lower malt discharge lock and with air ducts extending transversely through the malt compartment and having perforated sidewalls, means for switching all the air ducts for air input and means for switching all those air ducts for air output. The improvement includes the provision of three zones, namely an upper drying zone which is provided with air ducts which extend in the transverse direction, and with control means to allow drying air to enter the malt drying kiln in a transverse direction and to exhaust freely upwardly, an intermediate drying zone which is being provided with air ducts which extend in the transverse direction, and with control means to allow drying air to enter the malt drying kiln in a transverse direction through some of the air ducts, and to exhaust from the malt dryer in a transverse direction through the remainder of the air ducts, and means periodically to reverse the flow through the air ducts; and a lower drying zone, the lower drying zone including a perforated discharge lock which is controlled so that, when the kiln is in its drying mode, it is operated to allow drying air to enter the malt drying kiln, the total drying air of the lower drying zone escaping into the intermediate zone. Such vertical maltdrying kiln may be continuously operated to produce malt of a uniform and reproducible high quality. |
