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A method based on historical production data modeling to control the flow rate of tobacco re-moisturizing and adding water

A technology of adding water flow and production data, which is applied in the field of modeling and controlling tobacco moisture adding water flow based on historical production data, which can solve the problems of not considering the impact of feeding ratio and impact, and achieve the effect of shortening time and reducing dependence

Active Publication Date: 2022-07-05
QINHUANGDAO TOBACCO MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reasons are as follows: first, it did not take into account the large difference in the moisture absorption capacity of different materials, and the atomized water may not be able to absorb; Taking into account the impact of hot air, moisture removal, and climate change on the moisture content of materials

Method used

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  • A method based on historical production data modeling to control the flow rate of tobacco re-moisturizing and adding water
  • A method based on historical production data modeling to control the flow rate of tobacco re-moisturizing and adding water
  • A method based on historical production data modeling to control the flow rate of tobacco re-moisturizing and adding water

Examples

Experimental program
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Effect test

Embodiment 1

[0105] A method for controlling the flow rate of tobacco re-moisturizing and adding water based on historical production data modeling. When the tobacco re-moisturizing process is in the material head stage, the material head stage controls the actual water adding flow q of tobacco re-moisturizing _head The following formula 2 is used:

[0106] q _head =q 1_head =q 1 ×k 3

[0107] q in the above formula _head The actual water flow rate for tobacco re-moisturizing in the feed head stage, q 1_head Tobacco re-moisturizing water flow calculated by feed-forward in the feed stage, k 3 is the coefficient of variation of the feed head.

[0108] In this embodiment, the head variation coefficient k 3 The initial value of k is 3_ini , k 3_ini The general value range is 0.8~1.2, k 3 has a termination value of 1.0. k 3 The change rule of is to keep the initial value first, then gradually change, and finally keep the final value, because the performance of different recondition...

Embodiment 2

[0112] In this embodiment, on the basis of the first embodiment, when the tobacco moisturizing process is in the transitional process stage, the actual water-added flow q of the tobacco moisturizing is controlled in the transitional process stage. _tran The following formula 3 is used:

[0113] q _tran =q 1_tran +q 2 =q 1 +q 2

[0114] q in the above formula _tran The actual flow of water added for the tobacco regain in the transition process stage, q 1_tran Tobacco regain water flow rate calculated for the transition process stage feedforward.

[0115] In this embodiment, according to the outlet moisture set value u 2sp and the actual export moisture u 2 The deviation of the PID closed-loop feedback operation is carried out to obtain the feedback adjustment offset q 2 , with q 1_tran +q 2 as the actual water flow q _tran Control the process of tobacco regain.

[0116] In this embodiment, the head variation coefficient k 3 After the gradual change to 1.0, the to...

Embodiment 3

[0119] In this embodiment, on the basis of Embodiment 2, within time t1, the re-moisturized material is output through the discharge vibration tank 5, and the actual outlet moisture u can be detected by the outlet moisture meter 6 2 , the actual export moisture u 2 Close to the outlet moisture set value u 2spAnd the outlet moisture set value u 2sp and the actual export moisture u 2 The deviation is less than 0.35%, which means that due to the difference of actual production conditions, the tobacco regain water flow rate q obtained by the feedforward calculation 1_tran If it is too high, it is necessary to start the feedback adjustment offset q in advance 2 , to eliminate modeling errors.

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Abstract

The invention discloses a method for modeling and controlling the flow rate of tobacco re-moisturizing and adding water based on historical production data. It allows the control system to intelligently find the best water flow rate according to the current production conditions, reduce the dependence on feedback adjustment, and shorten the time for the actual outlet moisture to reach the outlet moisture set value and remain stable. In specific implementation, the moisture regain process is divided into three stages: material head, transition process and steady state production. In different stages, corresponding formulas are used to control the water flow rate, and feedback adjustment of outlet moisture is introduced in a timely manner to eliminate modeling errors. The invention calculates the effective production data of the current batch, reverses the standard water flow rate, and performs variable weight iterative calculation on the online modeling result of the previous batch of materials and the historical value of the same brand, so as to realize the online self-learning of the model to adapt to the season and the environment. Gradual changes in temperature and humidity.

Description

technical field [0001] The invention relates to the field of tobacco preparation, in particular to a method for controlling the flow of tobacco moisture and water based on historical production data modeling. Background technique [0002] In the tobacco silk production line, moisture regain and water control are widely used. The moisture-rejuvenating treatment of materials must be realized on equipment such as blade reconditioning cylinder, blade silk reconditioning cylinder, blade feeder with water adding function, cut stem feeder and other equipment. The moisture content of the re-moisturized material needs to be precisely controlled, and the stability of its moisture is very important for the subsequent drying process. [0003] Usually, after controlling the moisture content of tobacco materials, the moisture content of the materials before moisture regain is generally measured first. 1 and the actual export moisture u after the resurgence 2 , taking into account the o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A24B3/04B67D7/08
CPCA24B3/04B67D7/08
Inventor 王小飞杨洪艺张世成韩百恒王树香张羽
Owner QINHUANGDAO TOBACCO MACHINERY
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