Two stage control method for wetting leaf moisture regain temperature

A control method and temperature control technology, applied in electrical program control, comprehensive factory control, tobacco preparation, etc., can solve the problems of low control accuracy of leaf moistening and moisture recovery, poor product quality stability, etc., achieve improved temperature stability, and the method is simple and easy Line, high control precision effect

Active Publication Date: 2007-01-24
CHINA TOBACCO SHANDONG IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low control accuracy of leaf moistening and regaining moisture during silk production in the current tobacco industry, resulting in poor product quality stability. two-stage control method

Method used

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  • Two stage control method for wetting leaf moisture regain temperature

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with the drawings and embodiments.

[0013] In Fig. 1, the present invention adopts a two-stage series temperature control method to control the temperature of the wet leaf regain.

[0014] The first level control: Set the upper and lower limits of valve opening according to experience values ​​(such as upper limit 70%, lower limit 50%). When the discharge temperature of tobacco leaves does not reach the process set temperature, the PLC program controls the steam valve to quickly open to the upper limit; when the tobacco leaf temperature exceeds the process set temperature, the PLC program controls the steam valve to quickly drop to the lower limit. Due to the instantaneous fluctuation in the discharge of the moisture recovery cylinder, the steam valve can be quickly adjusted according to the discharge temperature, so that the temperature of the moisture recovery cylinder is stabilized, thereby stabilizing...

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Abstract

The present invention discloses a kind of two-stage control method for the temperature at the tobacco remoistening site, and the method of the present invention has the advantages of high control precision, high product quality stability, being simple and practical, etc. The method of the present invention includes two serially connected stages for controlling temperature at the tobacco remoistening site and steam valve with controlled opening for precise regulation of the technological temperature.

Description

Technical field [0001] The invention relates to a two-stage control method for the temperature at the moisture regain point of the leaf moisturizing workshop in the production of cigarettes. Background technique [0002] Leaf moisturizing is a very important process link in the tobacco industry's silk production operations. It serves the purpose of increasing the temperature and humidity in the tobacco leaves and removing tobacco leaves. Its processing accuracy determines the processing quality of subsequent processes and is an important link in determining the stability of cigarette smoking. [0003] In traditional tobacco processing, the process temperature control adopts PLC single closed-loop PID negative feedback control, that is, the steam flow is controlled by the steam valve opening, and the steam valve opening is added or subtracted according to the feedback result of the temperature measuring element at the discharge end to make it reach Process requirements. Due to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A24B3/04G05B19/418
Inventor 尹旭梅孟庆华田斌高卫
Owner CHINA TOBACCO SHANDONG IND
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