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Air flow dryer for granular material

An air-flow dryer and granular technology, which is used in dryers, tobacco drying, drying of solid materials, etc., can solve the problems of uneven drying of cut tobacco, easy accumulation and breakage of cut tobacco, etc.

Inactive Publication Date: 2005-03-09
JAPAN TOBACCO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, since there is a bend in the drying flow path, the shredded tobacco is easily broken when it passes through the bend. In addition, the shredded tobacco is easy to accumulate in the bend, and the accumulation of shredded tobacco causes uneven drying of the shredded tobacco.

Method used

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  • Air flow dryer for granular material
  • Air flow dryer for granular material
  • Air flow dryer for granular material

Examples

Experimental program
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Effect test

Embodiment Construction

[0037] Fig. 1 schematically shows an airflow dryer used for drying treatment of shredded tobacco of pellets.

[0038] The gas dryer has a gas flow path 2, and a circulation blower 4 and a heater 6 are installed in this order in the gas flow path 2. The circulation blower 4 sends gas such as air to the heater 6, and the heater 6 heats the gas to a predetermined temperature, specifically to 160°C to 300°C, preferably to 180°C to 260°C.

[0039] A steam supply pipe 8 extends from a portion of the gas flow path 2 between the circulation blower 4 and the heater 6, and the steam supply pipe 8 is connected to a steam supply source. A steam supply valve 10 is inserted in the steam supply pipe 8 . When the steam supply valve 10 is opened, steam is supplied from the steam supply source to the gas in the gas flow path 2 through the steam supply pipe 8 , thereby generating a dry gas flow containing superheated steam in the gas flow path 2 . Here, the temperature of the dry air flow is 1...

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Abstract

An air flow dryer for cut tobacco, comprising a drying duct (16) connecting a cut tobacco feed section (14) to a tangential separator (18), the drying duct (16) further comprising an upstream side duct portion (16a) linearly extending from the feed section (14) at an elevation of 30 to 60[masculine ordinal] and a downstream side duct portion (16b) projectedly curved upward, wherein drying gas flowing in the drying duct (16) may contain overheated steam.

Description

technical field [0001] The present invention relates to an airflow dryer for conveying granular material together with a heated drying gas stream and drying the granular material with a dry air flow during the conveying process, in particular to an airflow dryer suitable for drying raw shredded tobacco of cigarettes. Background technique [0002] Raw shredded tobacco for making cigarettes includes cut tobacco leaves without stems, shredded tobacco made of raw materials such as cut tobacco stems and reconstituted tobacco alone or mixed, or puffed shredded tobacco, all of which have a specified particle size, that is, a size. [0003] In the process of making such shredded tobacco, liquid spices are usually added to the shredded tobacco, that is, flavoring treatment is performed, and the shredded tobacco after this treatment has a high water content. Therefore, before being supplied to the cigarette making machine, the shredded tobacco after the seasoning treatment must be dri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B1/00A24B3/04F26B3/10F26B17/10
CPCF26B3/10F26B2200/22F26B17/105A24B3/04F26B17/101
Inventor 大高康弘花冈知浩远藤信康杉山明弘横田胜秀打田督
Owner JAPAN TOBACCO INC
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