Three stage type tobacco shred drying technique and tobacco dryer

Abstract

The invention provides a three-section tobacco shred drying process and a tobacco shred drying machine. In the three-section tobacco shred drying process, tobacco shreds are dried over three sections, wherein the heating temperature of the middle section is higher than that of the front section; the material flow rate and cylinder rotation speed of the middle section are higher than those of the front section; and the rear section has humidifying function. The three-section tobacco shred drying machine comprises a cylinder body, a heating pipeline and a hot wind pipeline, wherein the cylinder body consists of a front section, a middle section and a rear section, each section is connected with a rotating device and communicated with the hot wind pipeline; the interior of the front section is provided with a guiding plate forming a positive angle with the axial direction of the cylinder body; the interior wall surface of the middle section is provided with a heat exchange thin plate forming a negative angle with the axial direction of the cylinder body; the heat exchange thin plate communicates with the heating pipeline; the interior of the rear section is provided with a humidifying device and a guiding plate which parallels to the axis of the cylinder body. The invention dries tobacco shreds through three sections with different temperature and flow rates, reducing the occurrence of problems that the dried tobacco shreds may be charred on the outside and tender on the inside or only heads and ends are dried, preventing loss of nice smelling producing substances in the tobacco and ensuring the tobacco shred drying quality.

Description

technical field [0001] The invention relates to a shredded tobacco drying process and a shredded shredded drying machine, belonging to the technical field of shredded tobacco drying. Background technique [0002] By heating and drying the shredded tobacco so that its moisture is controlled within a certain value range, the moisture content of the shredded tobacco is an important indicator in the drying process of the shredded tobacco. The shredded tobacco dryer is a processing equipment for producing shredded tobacco, which is used for drying and shaping the shredded shredded tobacco after expansion. [0003] The existing shredded tobacco dryer is composed of mechanical parts such as a frame, a shredded drying drum, and a mechanical transmission system, hot air parts such as steam heating and moisture removal systems, and electronic control parts such as flow meters, moisture meters, and temperature controllers. Its working principle is that the drum forms an inclination at...

AI Technical Summary

Problems solved by technology

This process obviously has three technical defects: First, because the shredded tobacco has a large amount of moisture at the entrance, in order to meet the requirements of the shredded tobacco processing technical indicators, the only way to increase the processing temperature or prolong the processing time is to make a large amount of aroma-causing substances in high-grade raw materials. loss, thereby reducing product quality

The second is a portion of shredded tobacco (generally about 6000Kg). When passing through the shred drying machine, there are always heads and tails. This part accounts for about 10% of the total amount of shredded tobacco. Increase the loss of the production process and increase the cost of the enterprise

However, if manual intervention is used, the same portion of shredded tobacco will be processed in different process indicators, thereby reducing the processing accuracy of shredded tobacco

The third is to achieve rapid dehydration of shredded tobacco at high temperature in the same drum cavity, which will cause the shredded tobacco to be burnt on the outside and tender on the inside, reducing the processing quality

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