CN116687040A - Loose conditioning water adding proportion setting method - Google Patents
Loose conditioning water adding proportion setting method Download PDFInfo
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- CN116687040A CN116687040A CN202310456560.7A CN202310456560A CN116687040A CN 116687040 A CN116687040 A CN 116687040A CN 202310456560 A CN202310456560 A CN 202310456560A CN 116687040 A CN116687040 A CN 116687040A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 138
- 230000003750 conditioning effect Effects 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012937 correction Methods 0.000 claims abstract description 39
- 241000208125 Nicotiana Species 0.000 claims abstract description 38
- 235000002637 Nicotiana tabacum Nutrition 0.000 claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- 238000010521 absorption reaction Methods 0.000 claims abstract description 14
- 239000013072 incoming material Substances 0.000 claims description 39
- 239000000463 material Substances 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 6
- 238000009825 accumulation Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 6
- 238000010923 batch production Methods 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 description 7
- 235000019504 cigarettes Nutrition 0.000 description 6
- 239000012535 impurity Substances 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/04—Humidifying or drying tobacco bunches or cut tobacco
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/06—Loosening tobacco leaves or cut tobacco
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B9/00—Control of the moisture content of tobacco products, e.g. cigars, cigarettes, pipe tobacco
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
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- Manufacture Of Tobacco Products (AREA)
Abstract
The invention discloses a setting method of a loosening and conditioning water adding proportion, which is mainly designed in that based on feedforward prediction, feedback correction and grouping treatment, the three links are subjected to overall design, each element influencing the low-temperature conditioning outlet water content is completely represented, the accurate setting of the loosening and conditioning machine water adding proportion is realized, in particular, a water adding contribution rate coefficient is introduced on the theoretical water adding proportion, and the relation between the loosening and conditioning machine outlet water content and the water adding proportion is completely represented; then, the result of the historical batch production is fully utilized to guide the current production, a correction coefficient is formed based on the water adding deviation of each bundle of tobacco leaves which are pre-calibrated, the problem caused by the water absorption difference of the tobacco leaves is solved by means of a difference correction strategy, and the problem of inaccurate feedback control caused by the high delay characteristic of a moisture regain feeding system is further solved by using a feedback grading correction mechanism which is used as bias compensation.
Description
Technical Field
The invention relates to the field of cigarette manufacturing, in particular to a loosening and conditioning water adding proportion setting method.
Background
At present, the tobacco bale moisture regaining device in the tobacco shred making process of a cigarette production enterprise is a loosening moisture regaining machine, and the loosening moisture regaining machine only has hot air temperature control and water adding flow control, does not have an outlet moisture control function, and the outlet moisture control is a function which is developed by a user independently. The method generally adopts two modes of constant water adding and manual control, is influenced by factors such as incoming material moisture, tobacco water absorption characteristics, environment temperature and humidity and the like, and has an unsatisfactory control effect.
The various existing approaches are summarized: the manual control is too dependent on the experience of operators, and the water adding proportion set by correction is required to be continuously adjusted to reach the required outlet water content; controlling outlet moisture by adopting a method based on grouping processing, namely giving different water adding proportions to all tobacco packages in a batch; generally, 186 seconds are needed from an inlet to an outlet, and intense oscillation is often caused by PI D feedback control; in addition, most manufacturers adopt a process of re-moisturizing after constant-added water looseness and moisture regaining and water balance through a storage cabinet, and the process has the defects of back impermeability, complex processing and the like.
Therefore, the prior art is influenced by multiple factors such as operation experience, incoming material moisture, tobacco leaf water absorption characteristics, environment temperature and humidity and the like, so that the moisture fluctuation of a moisture regain feeding outlet is large, and the requirement of the outlet moisture standard is exceeded.
Disclosure of Invention
In view of the above, the present invention aims to provide a method for setting a loosening and conditioning water adding ratio, so as to solve the problem of large fluctuation of water in a low-temperature conditioning charging outlet.
The technical scheme adopted by the invention is as follows:
the invention provides a loosening and conditioning water adding proportion setting method, which comprises the following steps:
acquiring outlet moisture, incoming material moisture, steam flow, tobacco flow and preset target moisture of loosening and conditioning in real time;
calculating a theoretical water adding proportion by utilizing the outlet water and the incoming water;
obtaining a water adding contribution rate coefficient by utilizing the steam flow, the tobacco flow and the theoretical water adding proportion, wherein the water adding contribution rate coefficient is used for representing the influence of steam in the water adding process;
combining the water adding contribution rate coefficient with the theoretical water adding proportion to obtain an optimized first water adding proportion predicted value;
acquiring a pre-stored incoming material characteristic coefficient corresponding to a current production material, wherein the incoming material characteristic coefficient is used for representing the water absorption characteristic of tobacco leaves;
combining the incoming material characteristic coefficient with the first water adding proportion predicted value to obtain a second water adding proportion predicted value;
based on the current deviation between the outlet water content and the target water content, and combining different preset deviation grades, obtaining a feedback correction value corresponding to the current deviation;
and correcting the deviation of the predicted value of the second water adding proportion by using the feedback correction value to obtain a final predicted value for setting the water adding proportion.
In at least one possible implementation manner, the water addition contribution rate coefficient is obtained according to the following formula:
water contribution coefficient= (1-steam flow/(theoretical water addition ratio x tobacco flow))xloss coefficient; wherein the loss coefficient is a preset value.
In at least one possible implementation manner, the incoming material characteristic coefficient is calculated according to the following formula: incoming material characteristic coefficient= (outlet moisture-target moisture)/target moisture.
In at least one possible implementation manner, the water adding proportion setting method further comprises the following steps:
calculating the incoming material characteristic coefficient of each material in the formula according to the historical production accumulation, and recording the incoming material characteristic coefficient in a historical database;
and correspondingly taking out the incoming material characteristic coefficient of each package of material from the historical database based on the accumulated quantity of the current production.
In at least one possible implementation manner, the water adding proportion setting method further comprises the following steps:
presetting a plurality of deviation interval ranges between outlet moisture and target moisture;
and correspondingly setting feedback correction values of different grades for each deviation interval range.
In at least one possible implementation manner, the theoretical water adding proportion is calculated according to the following formula: theoretical water addition ratio= (outlet moisture-incoming moisture)/(100-outlet moisture).
Compared with the prior art, the main design concept of the invention is that based on feedforward prediction, feedback correction and grouping processing, the three links are subjected to overall design, thus completely representing each element influencing the moisture of the low-temperature moisture regain outlet, realizing the accurate setting of the moisture adding proportion of the loosening moisture regain, specifically introducing a moisture adding contribution rate coefficient on the theoretical moisture adding proportion, and completely representing the relation between the moisture of the loosening moisture regain outlet and the moisture adding proportion; then, the result of the historical batch production is fully utilized to guide the current production, a correction coefficient is formed based on the water adding deviation of each bundle of tobacco leaves which are calibrated in advance, the problem caused by the water absorption difference of the tobacco leaves is solved by means of a difference correction strategy, and the problem of inaccurate feedback control caused by the high delay characteristic of a moisture regain feeding system is further solved by using a feedback grading correction mechanism which is used as bias compensation, so that the invention provides a better water adding setting scheme which is sufficient for replacing the existing mode for the tobacco industry silk making production.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings, in which:
fig. 1 is a schematic flow chart of a method for setting a loosening and conditioning water adding ratio according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
The invention provides an embodiment of a loosening and conditioning water adding proportion setting method, which is specifically shown in fig. 1 and comprises the following steps:
step S1, acquiring outlet moisture, incoming material moisture, steam flow, tobacco leaf flow and preset target moisture of loosening and conditioning in real time;
s2, utilizing the outlet moisture and the incoming material moisture to calculate a theoretical water adding proportion;
s3, obtaining a water adding contribution rate coefficient by utilizing the steam flow, the tobacco flow and the theoretical water adding proportion, wherein the water adding contribution rate coefficient is used for representing the influence of steam in the water adding process;
s4, combining the water adding contribution rate coefficient with the theoretical water adding proportion to obtain an optimized first water adding proportion predicted value;
s5, acquiring a pre-stored incoming material characteristic coefficient corresponding to the current production material, wherein the incoming material characteristic coefficient is used for representing the water absorption characteristic of tobacco leaves;
s6, combining the incoming material characteristic coefficient with the first water adding proportion predicted value to obtain a second water adding proportion predicted value;
step S7, based on the current deviation between the outlet water content and the target water content, combining preset different deviation grades, and obtaining a feedback correction value corresponding to the current deviation;
and S8, correcting the second water adding proportion predicted value by using the feedback correction value to obtain a final predicted value for setting the water adding proportion.
Based on the specific development of the embodiment, the general design idea of the invention is to completely characterize each element influencing the moisture of the low-temperature conditioning outlet of the tobacco bale by adopting the comprehensive means of feedforward water adding prediction, feedback grading correction and grouping difference processing.
The integrated control model can be represented by the following formula (1):
wherein W is the final water addition ratio prediction result, M 2 For outlet water content M 1 For the water content of the incoming material, lambda is the contribution coefficient of water addition, X 1 Characteristic coefficient of incoming material, X 2 Is the feedback correction value.
The water contribution rate coefficient lambda is obtained by the following steps:
it will be appreciated that the theoretical water addition ratio is W Theory of Obtainable on the basis of formula (2):
in actual operation, the tobacco leaves after coming into the tobacco package are cut into slices and then are subjected to loosening and conditioning processing to be generally changed into bulk materials with the moisture content of 17-21%, and the moisture content of the tobacco leaves after conditioning is mainly increased by two parts of water adding and steam, so that the water adding contribution coefficient lambda is introduced, and the aim of the invention is to obtain an accurate water adding proportion setting value so as to solve the problem of inaccurate water adding proportion setting prediction. It should be noted here that, for the sake of calculation, the above-mentioned moisture may be expressed as a normalization, for example, 30% for the outlet moisture, and 30 may be taken as the outlet moisture.
The invention provides an optimized water adding proportion prediction formula based on a formula (2), which can be shown as a formula (3):
the water addition contribution coefficient λ here can be specifically represented by the following formula (4):
wherein L is 1 Steam flow (kg/h), L 2 Tobacco flow (kg/h), beta is the loss coefficient. Because a part of the two mediums of water and steam can be discharged by the impurity discharging system of the loosening and conditioning machine as impurity gas to maintain the pressure in the roller to be constant, the opening degree and the impurity discharging air quantity of the impurity discharging system are fixed under the given working condition, and the beta loss coefficient can be a preset empirical fixed value.
(II) incoming material characteristic coefficient X 1 The acquisition mode of (a) is as follows:
the predicted water adding amount (first water adding proportion predicted value) obtained by calculation according to the optimized water adding amount formula (3) is that the water adding setting of most tobacco packages can be met for a batch of 40 tobacco leaves, but the numerical deviation of the tobacco packages with a certain proportion can not be eliminated to be larger. Based on the above, the invention analyzes the outlet moisture and the corresponding set moisture (i.e. the outlet moisture control target preset according to the production process) in the production history data and obtains the difference between the two, thereby representing the feed characteristic coefficient (the water absorption characteristic of the tobacco) X of the tobacco 1 Reference is specifically made to the following equation (5). The incoming material characteristic coefficient can be recorded in the data corresponding to each package of tobacco leaves according to the accumulated amount of the material weight, and a fine adjustment basis under the characteristic dimension is provided for the next production.
(III) feedback correction value X 2 The acquisition mode of (a) is as follows:
according to the characteristic of high delay of the conditioning system, the actual water deviation of the outlet can be obtained, the water adding proportion is rectified again by adopting different preset correction offset values, the deviation can be set to be alpha when the system is implemented, and a calculation formula is shown as a formula (6):
α＝M an outlet －M Setting up (6)
The conditioning system can perform sectional processing according to the deviation alpha and feed back the correction value X 2 The assignment of (2) is shown in Table 1.
From the feedback correction value X 2 The influence of other factors such as ambient temperature and humidity, steam saturation and the like is converted into a feedback correction value X 2 And then the damping system can automatically adapt to different working conditions.
Finally, by combining the above, it can be further added that 186 seconds is needed from the inlet to the outlet of the material, in order to accurately explore the characteristics of each cigarette in the leaf group formula, the relation between the water content of the incoming material and the water adding proportion and the water content of the outlet, the invention adopts a queue technology to align the acquired data in practical application, realizes the time-space relation conversion of the production key data, and constructs a moisture auxiliary control system of the loosening and conditioning machine, and the system mainly comprises three modules: the system comprises a water adding proportion prediction module, a feedback grading correction module and an incoming material characteristic correction module.
1. And the water adding proportion prediction module is used for:
the water adding prediction module is used for predicting the current water adding proportion according to the produced tobacco flow, steam flow, outlet moisture, incoming material moisture, output of the feedback grading correction module and output of the incoming material characteristic coefficient correction module, and the predicted value is used as a water adding set value by the control system of the loosening and conditioning machine finally.
2. And a feedback grading correction module:
and the feedback grading correction module is used for outputting correction components corresponding to different preset grades through the deviation of the target moisture and the actual moisture (from the moisture meter) and further outputting the correction components to the water adding proportion prediction module.
3. The incoming material characteristic correction module:
the incoming material characteristic correction module is used for calculating the deviation between the actual moisture (from the moisture meter) and the target moisture (here, the deviation also represents the water absorption characteristic of tobacco leaves, the value of the deviation can be used as the incoming material characteristic coefficient), specifically, the incoming material characteristic coefficient of each cigarette in the formula can be calculated according to the production accumulation, namely, the water absorption characteristic attribute of each formula cigarette packet material is obtained by utilizing the accumulation data), and the incoming material characteristic coefficient is recorded in a historical database (the water absorption characteristic values of different batches and each formula tobacco leaf packet material recorded during the production of the historical batches are stored in a database); the incoming material characteristic correction module is also used for outputting the water absorption characteristic coefficient of the current production material, specifically, the water absorption characteristic coefficient of each pack of cigarettes is taken out from the historical database according to the production cumulative amount and is output to the water adding proportion prediction module, and the purpose of accurately correcting the predicted value is achieved.
In addition, the system frame can be transplanted to a computer in actual application, and is controlled manually through the aid of a machine, so that the operation difficulty can be reduced, the working efficiency is improved, and the automation level of water adding control of the moisture regain charging machine is improved.
In summary, the main design concept of the invention is that based on feedforward prediction, feedback correction and grouping processing, the three links are generally designed, each element influencing the moisture of the low-temperature moisture regain outlet is completely represented, the accurate setting of the moisture adding proportion of the loose moisture regain machine is realized, in particular, the moisture adding contribution rate coefficient is introduced on the theoretical moisture adding proportion, and the relation between the moisture of the outlet of the loose moisture regain machine and the moisture adding proportion is completely represented; then, the result of the historical batch production is fully utilized to guide the current production, a correction coefficient is formed based on the water adding deviation of each bundle of tobacco leaves which are calibrated in advance, the problem caused by the water absorption difference of the tobacco leaves is solved by means of a difference correction strategy, and the problem of inaccurate feedback control caused by the high delay characteristic of a moisture regain feeding system is further solved by using a feedback grading correction mechanism which is used as bias compensation, so that the invention provides a better water adding setting scheme which is sufficient for replacing the existing mode for the tobacco industry silk making production.
In the embodiments of the present invention, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relation of association objects, and indicates that there may be three kinds of relations, for example, a and/or B, and may indicate that a alone exists, a and B together, and B alone exists. Wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of the following" and the like means any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c may represent: a, b, c, a and b, a and c, b and c or a and b and c, wherein a, b and c can be single or multiple.
The construction, features and effects of the present invention are described in detail according to the embodiments shown in the drawings, but the above is only a preferred embodiment of the present invention, and it should be understood that the technical features of the above embodiment and the preferred mode thereof can be reasonably combined and matched into various equivalent schemes by those skilled in the art without departing from or changing the design concept and technical effects of the present invention; therefore, the invention is not limited to the embodiments shown in the drawings, but is intended to be within the scope of the invention as long as changes made in the concept of the invention or modifications to the equivalent embodiments do not depart from the spirit of the invention as covered by the specification and drawings.
Claims (6)
1. A method for setting a loosening and conditioning water adding ratio, comprising the steps of:
acquiring outlet moisture, incoming material moisture, steam flow, tobacco flow and preset target moisture of loosening and conditioning in real time;
calculating a theoretical water adding proportion by utilizing the outlet water and the incoming water;
obtaining a water adding contribution rate coefficient by utilizing the steam flow, the tobacco flow and the theoretical water adding proportion, wherein the water adding contribution rate coefficient is used for representing the influence of steam in the water adding process;
combining the water adding contribution rate coefficient with the theoretical water adding proportion to obtain an optimized first water adding proportion predicted value;
acquiring a pre-stored incoming material characteristic coefficient corresponding to a current production material, wherein the incoming material characteristic coefficient is used for representing the water absorption characteristic of tobacco leaves;
combining the incoming material characteristic coefficient with the first water adding proportion predicted value to obtain a second water adding proportion predicted value;
based on the current deviation between the outlet water content and the target water content, and combining different preset deviation grades, obtaining a feedback correction value corresponding to the current deviation;
and correcting the deviation of the predicted value of the second water adding proportion by using the feedback correction value to obtain a final predicted value for setting the water adding proportion.
2. The loose conditioning water addition ratio setting method according to claim 1, wherein the water addition contribution ratio coefficient is obtained according to the following formula:
water contribution coefficient= (1-steam flow/(theoretical water addition ratio x tobacco flow))xloss coefficient;
wherein the loss coefficient is a preset value.
3. The loose conditioning water adding proportion setting method according to claim 1, wherein the incoming material characteristic coefficient is calculated according to the following formula:
incoming material characteristic coefficient= (outlet moisture-target moisture)/target moisture.
4. The loose conditioning water addition ratio setting method according to claim 3, characterized in that the water addition ratio setting method further comprises:
calculating the incoming material characteristic coefficient of each material in the formula according to the historical production accumulation, and recording the incoming material characteristic coefficient in a historical database;
and correspondingly taking out the incoming material characteristic coefficient of each package of material from the historical database based on the accumulated quantity of the current production.
5. The loose conditioning water addition ratio setting method according to claim 1, characterized in that the water addition ratio setting method further comprises:
presetting a plurality of deviation interval ranges between outlet moisture and target moisture;
and correspondingly setting feedback correction values of different grades for each deviation interval range.
6. The loose conditioning water addition ratio setting method according to any one of claims 1 to 5, wherein the theoretical water addition ratio is obtained according to the following formula:
theoretical water addition ratio= (outlet moisture-incoming moisture)/(100-outlet moisture).
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| CN202310456560.7A CN116687040A (en) | 2023-04-25 | 2023-04-25 | Loose conditioning water adding proportion setting method |
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| CN202310456560.7A CN116687040A (en) | 2023-04-25 | 2023-04-25 | Loose conditioning water adding proportion setting method |
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