Improved novel tobacco shred expansion device

Abstract

The invention relates to a tobacco leaf puffing treatment device for preparing tobaccos in a tobacco factory, in particular to an improved novel tobacco shred expansion device. By the expansion device, expansion treatment is carried out on tobacco shreds which are soaked by carbon dioxide liquid and form dry ice by high-temperature airflow. The improved novel tobacco shred expansion device is in a Z-shaped tubular structure with an inlet and an outlet which are horizontally arranged, the inlet is connected with a hot air conveying device, the outlet is connected with a tangential separator, the position of the inlet is also communicated with a feeding mechanism, and the whole range of the tubular structure adopts an oblong section, wherein the area of the oblong section of an upright tubesection is gradually increased from an inlet end to an outlet end, the length of the longitudinal long axis of the oblong section is gradually increased, the length of the transverse short axis is unchanged, and hot air conveyed by the hot air conveying device is parallel to the direction of the transverse short axis in the direction of the inlet. The expansion device enhances the heat exchange effect of tobacco shreds in the expansion device greatly, also prevents the collision between the tobacco shreds and enhances the shred straightening rate.

Description

technical field [0001] The invention relates to a tobacco leaf puffing treatment device for preparing tobacco in a tobacco factory, more specifically, it refers to an improved new shredded tobacco expansion device, the expansion device expands the shredded tobacco soaked in carbon dioxide liquid and formed into dry ice through high-temperature air flow deal with. Background technique [0002] The current process of preparing carbon dioxide expanded shredded tobacco is to impregnate the shredded tobacco leaves with liquid carbon dioxide, and then reduce the pressure to normal pressure to make the carbon dioxide form dry ice. If the low-temperature dry ice shredded tobacco is fed into the pipe of the shredded tobacco expansion device and fed with high-temperature airflow, the dry ice will quickly sublime and overflow from the inside of the shredded tobacco, and the shredded tobacco will expand accordingly, thereby obtaining the above-mentioned carbon dioxide-expanded shredded ...

AI Technical Summary

Problems solved by technology

[0004] ①In the whole pipeline, the wind speed is extremely uneven. On each cross-section of the pipeline, the velocity gradient of shredded tobacco is very large, which leads to the relative speed difference between shredded tobacco, and the chance of collision and friction between shredded tobacco during transportation increases. Increase;

[0005] ② Due to the extremely uneven wind speed, the heat exchange of shredded tobacco is uneven, which will inevitably lead to uneven moisture content of shredded tobacco after sublimation, which will affect the quality index of shredded tobacco in subsequent processes;

[0006] ③ Due to the centrifugal force, the shredded tobacco will gather in the pipe and flow along the side with the largest bending radius (as shown in the instructions attached Figure 4 The shaded part shown is the movement track of shredded tobacco in the expansion device in the prior art), and the result will affect the heat exchange effect

[0008] In addition, there are also other technical solutions studied by technicians in order to overcome the above-mentioned defects. For example, the Chinese invention patent with the publication number CN1174000 and the name "Method and Equipment for Expanding Tobacco" discloses an expansion device with an increasing cross section. Pipeline structure, although it discloses a pipe with non-circular cross-section, including oval or rectangular shape, and defines the ratio of depth and width on its cross-section, but it does not pay attention to the continuous increase of cross-section The influence of the change of wind speed in the pipe caused by the depth of the pipe on the shredded tobacco in the pipe, thus seriously affecting the whole shredded rate of shredded tobacco

At the same time, the above-mentioned technical scheme is also disclosed in the US PCT patent publication with the international publication number WO96 / 05742 and the name "Method And Apparatus For Expanding Tobacco" (Method And Apparatus For Expanding Tobacco), but it has not noticed Due to the continuous expansion of the cross-sectional depth, the change of wind speed in the pipe has an impact on the shredded tobacco in the pipe, which seriously affects the whole cut ratio of the shredded tobacco

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