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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: 2008-06-11
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 accompanying drawings and embodiments.

[0013] In Fig. 1, the present invention adopts two-stage serial temperature control mode to control the temperature at the place where the leaves are moistened.

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

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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-level control method for the temperature of the leaf moistening and dampening place in the silk-making workshop in cigarette production. Background technique [0002] Moisturizing leaves 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 the miscellaneous gases in the 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 leaf processing, the temperature control of this process adopts PLC single closed-loop PID negative feedback control, that is, the steam flow is controlled by the opening of the steam valve, and the opening of the steam valve is added or subtracted according to the feedback result of the temperature measuring element at t...

Claims

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Application Information

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Patent Type & Authority Patents(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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