A combined screening method and device for blades after beating

Abstract

The invention provides a threshed leaf combination sieving method and device. The method comprises the following steps: 1 feeding threshed and stemmed leaves to a vibration sieve to sift out small leaves; 2, feeding leaves on the vibration sieve to a roller sieve to sift out middle leaves; 3, feeding the leaves on the roller sieve to a drum sieve to divide the leaves into large leaves and overlarge leaves. Due to the adoption of the method, the overlarge threshed leaves can be accurately sieved out for reprocessing, so as to improve the size distribution of the threshed leaves.

Description

technical field [0001] The invention relates to threshing and redrying equipment in the tobacco industry, in particular to a method and device for screening the size of threshed leaves during the threshing and redrying process. Background technique [0002] At present, in the threshing and redrying process of the tobacco industry, threshing and destemming is one of the main processes. This process mainly transports the tobacco leaves to the threshing and destemming unit to separate the leaves from the tobacco stems. The destemmed leaves are transported to The vibrating sieve is used to sieve the small leaves, and the small leaves under the sieve (usually the leaf size is less than 12mm) are collected and processed separately, and the remaining leaves on the sieve are collected and transported to the leaf storage cabinet for leaf storage or re-roasting. [0003] The industry believes that the size of the oversized blade is greater than 38mm, the size of the large blade is 25 ...

AI Technical Summary

Problems solved by technology

Too large leaves will cause two problems: one is that the leaves are easy to fold, the moisture content fluctuates greatly, and the serious shrinkage after roasting is not conducive to the subsequent processing of sheet tobacco; the other is that the shredded tobacco is too long after cutting. Excessively long shredded tobacco can easily cause entanglement and agglomeration, which will affect the stability of the moisture content of shredded tobacco in the drying process. The rolling process is prone to negative effects such as bamboo knots, short ends, and large fluctuations in the weight of cigarettes.

This method uses a single vibrating screen to screen the blades, but the material flow of the blades after beating is relatively large. At the same time, because the large blades are relatively soft, it is easy to cause the holes of the vibrating screen to be blocked, and the blades of different sizes after beating cannot be effectively screened. There are many leaves smaller than 38mm in the oversized leaves that are screened out, and the leaves smaller than 38mm will produce more debris after reprocessing, resulting in waste of leaves

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