Cut stem dryer outlet moisture content control method based on cumulative sum strategy
A control method and moisture content technology, which is applied in the direction of preparing tobacco, tobacco, processing tobacco, etc., can solve the problems of low control accuracy and slow response
Active Publication Date: 2022-07-15
CHINA TOBACCO HENAN IND
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Problems solved by technology
However, due to the slow response of PID control and low control accuracy, large quality fluctuations are likely to occur when the moisture content of the incoming material is not stable enough.
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[0033] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but not to be construed as a limitation of the present invention.
[0034] The present invention proposes an embodiment of a method for controlling the moisture content of the cut stem dryer outlet based on a cumulative sum strategy, specifically, such as figure 1 shown, including:
[0035] Step S1, based on the historical batch data of incoming cut stems of the same brand, obtain the historical distribution of incoming moisture content;
[0036] Step S2, obtaining the first statistic according to the preset accumulation sum strategy, using the current mois...
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The invention discloses a cut stem dryer outlet moisture content control method based on an accumulative sum strategy. A fast-response refined feedforward and feedback integration control strategy is constructed by adopting statistical analysis of process data trend. Specifically, a cumulative sum mechanism is adopted to predict and analyze the change trend of the supplied material moisture content and the outlet moisture content, and an integrated control strategy combining feedforward and feedback control is constructed: a statistical value related to the supplied material is compared with a historical distribution rule to determine the trend of the supplied material moisture content, and feedforward air door regulation and control are carried out according to the trend of the supplied material moisture content; the statistical value related to the outlet moisture content is compared with a plurality of outlet moisture content threshold values to determine the state of the current outlet moisture content, then graded feedback regulation and control are conducted on the opening degree of an air door, and finally the moisture content of the dried cut stems is controlled in combination with feedforward, feedback regulation and control and PID regulation and control. The process quality level of the moisture content of the cut stem drying outlet can be greatly improved, and the quality control capability of the process is effectively improved.
Description
technical field [0001] The invention relates to the field of cigarette manufacturing, in particular to a method for controlling the moisture content at the outlet of a cut stem dryer based on a cumulative sum strategy. Background technique [0002] Tobacco stems are one of the important raw materials for cigarette production, and their physical and chemical properties are significantly different from those of tobacco leaves, and usually require a separate processing process. The cut stem drying equipment achieves the effects of improving the filling value and elasticity of cut stems, reducing fragmentation, and improving the sensory quality of finished cut tobacco by flashing, puffing and drying cut stems. [0003] In recent years, the research on the drying process of cut stems has mainly focused on the influence of process parameters on chemical components. For example, it has been studied that steam pressure will have a significant impact on the chemical components, aroma...
Claims
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IPC IPC(8): A24B9/00A24B3/04
CPCA24B9/00A24B3/04
Inventor 侯加文汪冬冬李帆温运岭田秋生宋兴旺刘昂左倩倩李超
Owner CHINA TOBACCO HENAN IND