Tobacco moistening through-flow hot blast drum method and apparatus

Abstract

The through-flow drum hot air moistening method and its device are provided with a through hole (2) on the drum (1), and a hot air device for sending hot air toward the inside of the drum along the radial direction of the drum and a humidifying device for applying moisture are arranged outside the drum , hot air, water or steam or water and steam enter the drum from the through hole directly below the drum or under the side along the radial direction of the drum, and flow through the cross section of the drum to convect and contact the falling material, humidifying and increasing the temperature of the material. Excess moisture passes through the drum and out over the drum. The invention can fully contact the hot air, water and steam with the material and generate strong heat and moisture exchange without scalding the tobacco leaves, thereby obtaining good leaf moistening effect.

Description

technical field [0001] The invention relates to the technical field of tobacco leaf moistening. Background technique [0002] The traditional drum-type hot air moistening method is to feed the tobacco leaf material into the drum, and simultaneously send hot air and water or spray hot steam from the feed end or discharge end of the drum, and continuously turn the tobacco leaves forward in the drum. The material is heated and humidified to achieve the purpose of moistening the leaves. This leaf moistening method has at least the following deficiencies: ① hot air, moisture or steam are added into the drum at the same time, and the hot air, moisture or steam and the material are all moved along the axial direction of the drum. The heat and moisture exchange intensity is low, the tobacco leaves heat up slowly, and the moisture diffusion and transfer are slow. ②The water sprayed directly by the humidifying device can only cover part of the tobacco leaf surface. In addition, the ...

AI Technical Summary

Problems solved by technology

This leaf moistening method has at least the following deficiencies: ① hot air, moisture or steam are added into the drum at the same time, and the hot air, moisture or steam and the material are all moved along the axial direction of the drum. The heat and moisture exchange intensity is low, the tobacco leaves heat up slowly, and the water diffusion and transfer are slow

②The water sprayed directly by the humidifying device can only cover part of the tobacco leaf surface. In addition, the temperature of the tobacco leaf base is not high, and the water on the tobacco leaf surface cannot be diffused and transferred in time, resulting in uneven moisture in the tobacco leaves and water-stained tobacco on some tobacco leaves.

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