Method for self cleaning of tobacco drying apparatus

Details Method for self cleaning of tobacco drying apparatus Method for self cleaning of tobacco drying apparatus

1999-02-11

2000-05-16

Gulakowski, Randy

Cleaning and liquid contact with solids

Processes

Hollow work, internal surface treatment

134 2211, 134 2212, 134 2218, 134 30, 431 2, 432 2, B08B 902, B08B 704

Patent

active

060622385

ABSTRACT:
After several drying cycles in a pneumatically conveying tobacco drying apparatus, the interior of the drying apparatus becomes built-up with tobacco including casings and other additives thereby causing decreased flow of air entrained with tobacco as well as potential contamination with tobacco pieces from previously dried tobacco. Cleaning of the built-up materials is accomplished by recirculating superheated air through the tobacco drying apparatus. The air is heated to a preselected high temperature of at least 430.degree. F. at a rate, generally not to exceed 4.degree. F. per minute and circulated through the drying apparatus for a predetermined period of time. During heating and recirculating air at the preselected temperature, the tobacco materials built up on the drying apparatus are cooked and removed by continual purging with the recirculating air.

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