Tobacco material pneumatic drying process and equipment

Abstract

The invention provides a pneumatic drying method and equipment thereof for realizing large-flow tobacco material puffing drying treatment; the method comprises the following steps: puffed tobacco material is conveyed to a drying pipe for being dried by hot air flows, and then the tobacco material is separated from hot sir; the drying pipe is composed of a horizontal drying pipe and a vertical drying pipe of which the cross section is more than the cross section of the horizontal drying pipe; hot air with the temperature at 100-250 DEG C and air flow speed of10-50m/s of is sent in the horizontal drying pipe, wherein the air flow feeding direction is vertical to the material feeding direction; the material driven by hot air flows enters in the vertical drying pipe and is ascended in a suspension way, and the ascending speed of the material is reduced to 0.5-5m/s; meanwhile, sundries such as slivers with large density in the material can not be suspended and are separated pneumatically under the wind speed. By arranging the vertical drying pipe with large caliber, the speed of the material, moving upwards along the air flow direction, is reduced, on the premise of not increasing the drying route, the drying time of the material is prolonged, heat-transferring and mass transferring coefficient is improved, and the drying time of the material is improved.

Description

technical field [0001] The invention belongs to the technical field of tobacco processing, and relates to a process for drying tobacco materials by using high-temperature airflow and equipment for realizing the process. Background technique [0002] The airflow drying process has the advantages of high drying intensity, short drying time, large processing capacity, high thermal efficiency, simple structure of the airflow drying tube, and easy maintenance. Because of the above advantages of airflow drying, airflow drying has a wide range of applications in chemical, food, pharmaceutical and other industries. [0003] At present, the cut stem puffing drying modes commonly used in the domestic tobacco processing industry mainly include: 1. HT plus drying cut stem cylinder; 2. COMAS cut stem puffing tower; 3. Flash grafting cut stem puffing tower; 4. Flash plus flow Bed; 5, HT plus fluidized bed; 6, COMAS tunnel-type shredded stem drying machine and other modes. The common dis...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a tobacco material airflow drying method, which introduces the suspension airflow drying technology into the existing tobacco material puffing and drying process, so as to realize the large flow of tobacco material puffing and drying, and improve the moisture balance of the discharge , to overcome the deficiencies of the existing tobacco material puffing and drying process and equipment; at the same time, in the process of suspending the material, the stems and other sundries in the tobacco material are separated by air to further improve the purity of the tobacco material

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