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Tobacco shreds drying and moisture moving control method

A shredded tobacco and drying technology, which is applied in the fields of tobacco, tobacco preparation, application, etc., can solve the problems of dry shredded tobacco, loss of shredded tobacco aroma, and increase in cigarette manufacturing costs, etc.

Inactive Publication Date: 2005-08-24
LONGYAN CIGARETTE FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the temperature of the tube wall is too high, the anti-breakage performance of the shredded tobacco will decrease, the conversion rate of the shredded tobacco will decrease significantly, and at the same time, the aroma of the shredded tobacco will be lost, and the shredded tobacco will produce a burnt smell; Decrease, increased consumption of raw materials, thereby increasing cigarette manufacturing costs
In addition, due to the wide range of temperature fluctuations in the drying process of shredded tobacco, it has a significant negative impact on the internal and external quality of shredded tobacco processing

Method used

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  • Tobacco shreds drying and moisture moving control method

Examples

Experimental program
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Effect test

Embodiment 1

[0011] Embodiment 1: The system uses a Siemens S7-300 programmable controller plus a man-machine interface as a control unit, such as figure 1 As shown, control mode 1 is selected according to the characteristics of the cigarette brand, and the system sets the upper limit T of the tube wall temperature T 1 =170°C, lower limit T 2 =130°C and process hot air temperature and initial process hot air flow G 0 , after the system is initialized, the initial cylinder wall temperature T is given according to the incoming tobacco flow rate, moisture content and target moisture content at the outlet of the drying machine 0 , in the normal silk drying process, when the moisture at the outlet of the silk dryer changes, the temperature of the process hot air and the flow rate of the process hot air remain constant. Constitute a closed-loop control loop to realize the automatic control of the outlet target moisture; and when the incoming tobacco flow and moisture fluctuate greatly, the T ...

Embodiment 2

[0012] Embodiment 2: The system uses a Siemens S7-300 programmable controller plus a man-machine interface as a control unit, such as figure 1 As shown, the second control mode is selected according to the characteristics of the cigarette brand. The system sets the hot air upper limit flow rate G 1 =3000m 3 / h, hot air lower limit flow rate G 2 =1000m 3 / h and hot air temperature and initial cylinder wall temperature T 0 , after the system is initialized, the initial process hot air flow rate G is given according to the incoming tobacco flow rate, moisture content and the target moisture content of the dryer outlet 0 , in the normal silk drying process, when the moisture content at the outlet of the silk dryer changes, the system wall temperature T and the process hot air temperature remain constant, and the frequency of the process hot air fan is automatically adjusted through proportional calculus calculations, thereby adjusting the process hot air flow rate G , constit...

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Abstract

A control method for drying tobacco shreds features use of dual-loop control and two control modes. After the upper and lower temp limitations of cylinder wall are set up by system, the temp of cylinder wall is regulated for automatically controlling the content of water in tobacco shreds. After the temp of cylinder wall is fixed, the flow of hot-air is regulated to control the content of water in tobacco shreds. Otherwise, after the upper and lower limitations of the flow of hot air ar set up, the flow of hot air is regulated to control the content of water in tobacco shreds or after the flow of hot-air is fixed, the temp of cylinder wall is regulated to control the content of water in tobacco shreds.

Description

1. Technical field [0001] The invention relates to a method for making shredded tobacco in the tobacco industry, in particular to a method for controlling the drying and dehumidification of shredded tobacco. 2. Background technology [0002] At present, in the domestic tobacco industry's shred production process, the shredded tobacco is mostly dried and dehumidified by the drum shredded shredded drying process. The shredded tobacco is dried and dehumidified through the slow heat conduction between the drum wall and the shredded tobacco and the convective heat transfer between the shredded tobacco and the process hot air in the drum. The traditional control method for adjusting the dehumidification capacity of shredded tobacco is to realize the drying and dehumidification of shredded tobacco through a single-loop control method that independently adjusts the temperature of the cylinder wall of the drum type shredded drying machine. The dehumidification amount of the silk drye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A24B3/04
Inventor 陈河祥刘志平洪伟龄李跃锋姜焕元
Owner LONGYAN CIGARETTE FACTORY
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