CN113273713B - Tobacco shred production system and tobacco material moisture content control method - Google Patents
Tobacco shred production system and tobacco material moisture content control method Download PDFInfo
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- CN113273713B CN113273713B CN202110728290.1A CN202110728290A CN113273713B CN 113273713 B CN113273713 B CN 113273713B CN 202110728290 A CN202110728290 A CN 202110728290A CN 113273713 B CN113273713 B CN 113273713B
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- 241000208125 Nicotiana Species 0.000 title claims abstract description 306
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 306
- 239000000463 material Substances 0.000 title claims abstract description 70
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 168
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 230000003750 conditioning effect Effects 0.000 claims abstract description 11
- 238000010792 warming Methods 0.000 claims description 53
- 238000003860 storage Methods 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 12
- 238000000611 regression analysis Methods 0.000 claims description 12
- 230000001419 dependent effect Effects 0.000 claims description 8
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- 238000003892 spreading Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 description 25
- 230000007613 environmental effect Effects 0.000 description 14
- 238000001035 drying Methods 0.000 description 12
- 235000019504 cigarettes Nutrition 0.000 description 10
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- 230000001276 controlling effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
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- 238000005520 cutting process Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
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- 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
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B7/00—Cutting tobacco
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B7/00—Cutting tobacco
- A24B7/14—Feeding or control devices for tobacco-cutting apparatus
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- 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
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Abstract
The utility model relates to a tobacco shred production system and a tobacco material water content control method, the tobacco shred production system comprises: loosening and dampening rollers; the tobacco slice heating roller is internally provided with a water adding device for adding water to the tobacco slices in the tobacco slice heating roller, and the output tobacco slices have a second water content; the cut tobacco entering the cut tobacco dryer has a third water content; the inlet moisture detector and the outlet moisture detector are used for respectively detecting the first moisture content and the second moisture content; and the controller is used for adjusting the water adding proportion of the current batch of the tobacco flakes in the loosening and conditioning roller in a preset proportion, obtaining a control target value of the second water content according to a function relation between the pre-obtained third water content and the second water content and a preset target value which needs to be met by the third water content, and determining the water adding amount of the water adding device by combining the detection values of the first water content and the second water content of the current batch of the tobacco flakes.
Description
Technical Field
The disclosure relates to the technical field of tobacco processing, in particular to a tobacco shred production system and a tobacco material moisture content control method.
Background
The moisture content of the material is an important index in the tobacco shred manufacturing process, is directly related to the conversion of the processing characteristics, the physicochemical characteristics and the storage characteristics of the tobacco material, and is a key indication for evaluating and controlling the quality of the tobacco shred manufacturing process. The control of the moisture content at the cut tobacco drying inlet is particularly critical, relevant process parameters of the cut tobacco drying link are directly influenced, and the control is closely related to the cut tobacco drying quality and the finished cut tobacco quality.
In the related technology known by the inventor, the regulation and control of the moisture content of the material before the tobacco shred manufacturing line is cut into shreds is basically the adjustment of the proportion of water added in the loosening and moisture regaining link of the tobacco flakes, however, the moisture content control effect of the tobacco material is poor in the tobacco production process, and the production quality of the tobacco shreds is greatly influenced.
Disclosure of Invention
The utility model provides a tobacco throwing production system and tobacco material moisture content control method, can improve the moisture content control effect of tobacco material.
According to an aspect of the present disclosure, there is provided a tobacco cut-making production system comprising:
the loosening and conditioning roller is configured to loosen the tobacco flakes and increase the temperature and humidity;
the tobacco sheet temperature-increasing roller is arranged at the downstream of the loosening and moisture-regaining roller and is configured to increase the temperature of tobacco sheets, the tobacco sheets entering the tobacco sheet temperature-increasing roller have a first water content, a water adding device is arranged in the tobacco sheet temperature-increasing roller and is configured to add water to the tobacco sheets in the tobacco sheet temperature-increasing roller, and the tobacco sheets output from the tobacco sheet temperature-increasing roller have a second water content;
the cut tobacco drying machine is arranged at the downstream of the tobacco sheet heating roller and is configured to dry cut tobacco formed by the tobacco sheets, and the cut tobacco entering the cut tobacco drying machine has a third moisture content;
an inlet moisture detector and an outlet moisture detector configured to detect values of the first and second moisture contents, respectively; and
the controller is configured to adjust the water adding proportion of the current batch of tobacco flakes in the loosening and conditioning roller in a preset proportion, obtain a control target value of the second water content according to a function relation between the pre-obtained third water content and the second water content and a preset target value which needs to be met by the third water content, and determine the water adding amount of the water adding device by combining the detection values of the first water content and the second water content of the current batch of tobacco flakes.
In some embodiments, the tobacco-making system further comprises:
the leaf storage cabinet is arranged between the loosening and moisture regaining roller and the tobacco sheet warming roller and is configured to store the tobacco sheets;
the conveying component is configured to convey the tobacco sheet materials output by the tobacco storage cabinet, and a material homogenizer is arranged above the conveying component and is configured to limit the material spreading height on the slope conveyor; and
the feeding vibration groove is arranged at the downstream of the conveying part, the feeding end of the feeding vibration groove is positioned below the discharging end of the conveying part, and the feeding vibration groove is configured to enable the tobacco flake materials to enter the tobacco flake warming drum;
wherein, the inlet moisture detector is arranged on the feeding vibration groove.
In some embodiments, the tobacco-making production system further comprises a driving component configured to drive the conveying component to operate and adopt variable-frequency speed regulation control;
wherein the controller is configured to keep the flow rate of the tobacco flake material at the feeding hole of the tobacco flake warming drum constant by adjusting the control frequency of the driving part in the production process of the tobacco flake in the current batch.
In some embodiments, the tobacco-making system further comprises:
a tobacco cutter arranged between the tobacco sheet heating roller and the cut tobacco dryer and configured to cut the tobacco sheets into cut tobacco; and
the discharging vibration groove is arranged below the discharging hole of the tobacco flake warming roller and is configured to convey tobacco flakes to the tobacco cutter;
wherein, the outlet moisture detector is arranged on the discharging vibration groove.
In some embodiments, the watering device is located at an end of the tobacco sheet warming drum adjacent the feed opening along the axis of the tobacco sheet warming drum.
In some embodiments, the water adding device is provided with an opening regulating valve, and the controller is configured to control the opening of the opening regulating valve through PID closed loop feedback to regulate the water adding amount of the water adding device.
In some embodiments, the tobacco-making system further comprises:
a humidity detector configured to detect an ambient humidity;
a first temperature detector configured to detect an ambient temperature; and
a second temperature detector configured to detect a temperature of the sheet tobacco output from the sheet tobacco warming drum;
and the controller is configured to perform multiple regression analysis on the historical data set obtained through detection by taking the third water content as a dependent variable and taking the second water content, the ambient humidity, the ambient temperature and the temperature of the tobacco lamina output by the tobacco lamina heating roller as independent variables to obtain a multiple regression equation so as to obtain a functional relation between the third water content and the second water content.
In some embodiments, the controller is configured to normalize the third moisture content, the second moisture content, the ambient humidity, the ambient temperature, and the historical set of lamina temperature data output by the lamina warming drum to convert all data to data between [0,1] prior to performing the multiple regression analysis.
According to another aspect of the present disclosure, a method for controlling moisture content of tobacco material based on the above-mentioned embodiment cut tobacco production line is provided, which includes:
adjusting the water adding proportion of the current batch of tobacco flakes in the loosening and conditioning roller according to a preset proportion;
obtaining a control target value of the second moisture content according to a function relation between the pre-obtained third moisture content and the second moisture content and a preset target value which needs to be met by the third moisture content;
and determining the water adding proportion of the water adding device according to the control target value of the second water content, the first water content of the current batch of the tobacco flakes and the detection value of the second water content.
In some embodiments, pre-obtaining a functional relationship between the third moisture content and the second moisture content comprises:
and performing multiple regression analysis on the historical data set obtained through detection by taking the third water content as a dependent variable and taking the second water content, the ambient humidity, the ambient temperature and the temperature of the tobacco lamina output by the tobacco lamina heating roller as independent variables to obtain a multiple regression equation so as to obtain the functional relation between the third water content and the second water content.
In some embodiments, pre-obtaining the functional relationship between the third moisture content and the second moisture content further comprises:
before performing multiple regression analysis, normalization processing is performed on the third moisture content, the second moisture content, the ambient humidity, the ambient temperature and the temperature of the tobacco lamina output by the tobacco lamina temperature-increasing roller, and all data are converted into data between [0,1 ].
In some embodiments, pre-obtaining the functional relationship between the third moisture content and the second moisture content further comprises:
before normalization processing, the historical data obtained from each production batch is classified according to product brands.
The tobacco shred production system provided by the embodiment of the disclosure is provided with two tobacco sheet humidifying links, the water adding proportion of the current batch of tobacco sheets in a loose moisture regaining roller is adjusted downwards, the control target value of the second water content is obtained according to the function relation between the pre-obtained third water content and the second water content and the preset target value which needs to be met by the third water content, the water adding amount of the water adding device is determined by combining the current detection values of the first water content and the second water content, the water adding amount demand of the tobacco sheet warming roller is met, and the moisture content of the tobacco sheets can be effectively adjusted in time according to the preset target value by increasing the moisture content adjusting and controlling point of the tobacco sheets when the larger moisture content deviation occurs.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic diagram of the modular components of a tobacco-making production system according to the present disclosure.
Fig. 2 is a schematic diagram of a related structure of a tobacco lamina warming drum in the tobacco shred production system of the present disclosure.
Fig. 3 is a schematic diagram of the components of a control module in the tobacco shred production system of the present disclosure.
FIG. 4 is a schematic flow chart diagram of some embodiments of a method of controlling moisture content of a tobacco material according to the present disclosure.
Description of the reference numerals
1. Unpacking machine; 2. slicing machine; 3. loosening and dampening rollers; 4. screening and feeding the roller; 5. a leaf storage cabinet; 6. a tobacco lamina warming drum; 7. a filament cutter; 8. a cut tobacco dryer; 9. a conveying member; 10. a material homogenizer; 11. feeding and vibrating trough; 12. an inlet moisture detector; 13. a water adding device; 14. a discharging vibration groove; 15. an outlet moisture detector; 16. a humidity detector; 17. a first temperature detector; 18. a second temperature detector; 19. and a controller.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without any inventive step, are intended to be within the scope of the present disclosure.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In the description of the present disclosure, it is to be understood that the terms "central," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the scope of the invention.
In the description of the present disclosure, it should be understood that the terms "first," "second," and the like are used for limiting the components, and are used only for the convenience of distinguishing the corresponding components, and if not otherwise stated, the above terms do not have special meanings, and therefore, should not be construed as limiting the scope of the present disclosure.
As shown in fig. 1, the process flow before the tobacco shred manufacturing line is dried is as follows: the cigarette packet is removed and packaged by a bale breaker 1, then is conveyed to a slicer 2, and the tobacco flakes sliced by the slicer 2 enter a loosening and moisture regaining roller 3 for temperature and humidity increase, so that the tobacco flakes are uniformly loosened, and the processing resistance of the tobacco flakes is improved; feeding the loosened tobacco flakes into a screening and feeding roller 4 for applying feed liquid, so that the quality of the tobacco flakes is improved; finally, the tobacco leaves enter a leaf storage cabinet 5 for storage so as to balance the temperature of the tobacco leaves and the applied process medium; after the tobacco flakes reach the storage time required by the process, the tobacco flakes enter the tobacco flake heating roller 6 to be heated so as to ensure the process quality of the shredding link, and the tobacco flakes enter the tobacco shred baking machine 8 to be dried after being shredded by the tobacco shredder 7.
Aiming at the problem that the moisture content control effect of tobacco materials is poor, long-term research and experiments show that the existing tobacco shred manufacturing process flow at least has the following problems in the regulation and control of the moisture content of a cut tobacco drying inlet:
1. the regulation and control point is single. In the existing process flow, the regulation and control of the tobacco shred manufacturing line on the moisture content of a cut tobacco drying inlet basically depends on the adjustment of the water adding proportion of the sheet loosening and conditioning roller 3, and the regulation and control point position is single, so that the regulation and control effect is poor.
2. The regulation and control interval time is long. The process steps from loosening and moisture regaining of the loosening and moisture regaining roller 3 to tobacco drying are many, the flow is complex, uncertain factors such as normal scheduling adjustment exist, the feedback response period of closed-loop adjustment is long, and effective adjustment and control are difficult to implement after the water content is adjusted.
3. The influence of fluctuation of the temperature and the humidity of the environment cannot be overcome. The general tobacco processing enterprises do not realize the full-line constant temperature and humidity control, so the fluctuation of the temperature and the humidity of the workshop environment directly influences the change of the moisture content of the material; in addition, environmental factors are not related to the control of the moisture content of the cut tobacco drying inlet in the prior art, so that the influence degree of environmental temperature and humidity fluctuation on the moisture content of the material is unknown.
Based on the above-described problems, as shown in fig. 1-3, the present disclosure provides a tobacco-making production system, which in some embodiments, includes: a loosening and moisture regaining roller 3, a tobacco sheet heating roller 6, a cut tobacco dryer 8, an inlet moisture detector 12 and an outlet moisture detector 15.
And the loosening and moisture regaining roller 3 is configured to loosen the tobacco flakes and increase the temperature and humidity, and the loosening and moisture regaining roller is a main water adding process link of the tobacco flakes.
The tobacco slice warming drum 6 is arranged at the downstream of the loosening and moisture regaining drum 3 and is configured to warm tobacco slices, the tobacco slices entering the tobacco slice warming drum 6 have a first water content, the water adding device 13 is arranged in the tobacco slice warming drum 6 and is configured to add water to the tobacco slices in the tobacco slice warming drum 6, the tobacco slices output from the tobacco slice warming drum 6 have a second water content, and the process is a compensation water adding process link of tobacco slice materials.
And the cut tobacco dryer 8 is arranged at the downstream of the tobacco flake warming roller 6 and is configured to dry cut tobacco formed by the tobacco flakes, and the cut tobacco entering the cut tobacco dryer 8 has a third moisture content. A tobacco cutter 7 is arranged between the tobacco slice heating roller 6 and the tobacco dryer 8 and is used for cutting the tobacco slices into tobacco shreds.
An inlet moisture detector 12 and an outlet moisture detector 15 configured to detect values of the first and second moisture contents, respectively, the moisture detectors being capable of dynamically detecting moisture contents in the tobacco material.
And the controller 19 is configured to adjust the water adding proportion of the current batch of tobacco flakes in the loosening and conditioning roller 3 down according to a preset proportion, obtain a control target value of the second water content according to a function relation between the pre-obtained third water content and the second water content and a preset target value which needs to be met by the third water content, and determine the water adding amount of the water adding device 13 by combining the detection values of the first water content and the second water content of the current batch of tobacco flakes.
The preset proportion of the downward regulation can be obtained according to experiments, not only a margin is reserved for compensating water addition of the tobacco sheet warming roller 6, but also the requirement of the loosening and moisture regaining roller 3 on the tobacco sheet process quality is not influenced, namely the water addition proportion is properly reduced under the condition of meeting the requirement of unchanged sensory quality. For example, the watering proportion can be reduced by a preset step size and the sensory quality of the tobacco produced can be evaluated at each watering proportion to obtain a threshold set by the preset proportion.
When the tobacco material output by the tobacco sheet heating roller 6 enters the cut tobacco drier, the moisture content is changed due to the influence of environmental factors or material factors, so that the third moisture content is not equal to the second moisture content. The third moisture content of the cut tobacco material entering the cut tobacco dryer is the target to be finally achieved, the third moisture content can be determined according to the process quality of the finally produced tobacco material, the control target value of the second moisture content is reversely deduced according to the function relation between the pre-obtained third moisture content and the second moisture content, and the water adding amount of the tobacco sheet heating roller 6 is obtained.
The embodiment of the disclosure is provided with two tobacco sheet humidifying links, wherein a loose moisture regain roller 3 is a main humidifying link, a tobacco sheet temperature-increasing roller 6-position adjusting humidifying link is used for adjusting the proportion of water added to the tobacco sheets of the current batch in the loose moisture regain roller 3, the water adding amount of a water adding device 13 is determined according to the function relation between the pre-obtained third water content and the second water content and the preset target value which needs to be met by the third water content, the control target value of the second water content is obtained, the water adding amount requirement of the tobacco sheet temperature-increasing roller 6 is met by combining the current first water content and the detection value of the second water content, and the moisture content of the tobacco sheets can be timely and effectively adjusted according to the preset target value when the larger moisture content deviation occurs.
Moreover, the water adding proportion of each process point is reasonably distributed again, so that the stable realization of the regulation and control target of the tobacco flakes can be promoted on the premise of guaranteeing the process quality of materials of each process point.
Thirdly, the prior art only adds water in the loosening and moisture regaining roller 3, and the process links from loosening and moisture regaining, temperature increasing and humidifying to the tobacco drying link are multiple, the flow is complex, uncertain factors such as normal production scheduling and adjustment exist, the feedback period of closed-loop regulation is long, and effective regulation and control are difficult to implement. According to the embodiment of the disclosure, only the tobacco cutting link is arranged between the humidifying link and the tobacco drying link of the tobacco sheet heating roller 6 which plays a role in regulation, so that the process link is reduced, the control flow is simplified, uncertain factors in control are reduced, the regulation and control feedback period is shortened, and the moisture content can be regulated and controlled more effectively and sensitively.
In some embodiments, as shown in fig. 1 and 2, the tobacco-making production system further comprises: a leaf storage cabinet 5, a conveying part 9 and a feeding vibration groove 11.
A leaf storage cabinet 5, disposed between the loosening and conditioning drum 3 and the sheet warming drum 6, is configured to store the sheet to balance the sheet temperature and the applied process media.
The conveying part 9 is configured to convey the tobacco slice materials output by the tobacco storage cabinet 5, a material distributing device 10 is arranged above the conveying part and configured to limit the material spreading height on the slope conveyor, and the material spreading height of the advancing tobacco slices is limited within a preset range under the action of the material distributing device 10. For example, the conveying component 9 may be a slope conveyor, which is inclined gradually upwards from the input end to the output end, the material refiner 10 may be a roll type material refiner, and the material refiner 10 is controlled by variable frequency speed regulation.
And the feeding vibration groove 11 is arranged at the downstream of the conveying part, the feeding end of the feeding vibration groove 11 is positioned below the discharging end of the conveying part 9, and the feeding vibration groove is configured to enable the sheet materials to enter the sheet heating roller 6. Wherein, the inlet moisture detector 12 is arranged on the feeding vibration groove 11. For example, the feed shaker tank 11 may be provided with a bracket for mounting the inlet moisture detector 12.
This embodiment can shake groove 11 through the feeding and provide the piece cigarette material to the in-process of piece cigarette warming drum 6 and carry out moisture detection, and the piece cigarette material is comparatively loose this moment, and the distribution is more even, can dynamically measure the piece cigarette moisture content of piece cigarette warming drum 6 feed inlet in succession accurately.
In some embodiments, the tobacco shred production system further comprises a driving component configured to drive the conveying component 9 to operate and adopt variable frequency speed regulation control; wherein the controller 19 is configured to keep the flow rate of the tobacco lamina material at the feeding port of the tobacco lamina heating roller 6 constant by adjusting the control frequency of the driving part during the production of the tobacco lamina of the current batch.
Because the flow of the tobacco sheet material provided by the tobacco storage cabinet 5 can change, the running speed of the conveying part 9 is adjusted through variable-frequency speed regulation, so that the flow of the tobacco sheet material entering the tobacco sheet warming drum 6 is kept unchanged, therefore, the water adding amount of the water adding device 13 in unit time can be kept at a certain level in the production process of the current batch of tobacco sheets, the opening regulating valve of the water adding device 13 is not required to be frequently and greatly adjusted, the phenomenon that water adding is not uniform due to the fact that the opening regulating valve is greatly adjusted, the water adding amount is enabled to have errors can be prevented, the uniformity and accuracy of the water adding amount are improved, and the quality of tobacco production is ensured.
In some embodiments, the tobacco-making system further comprises: a filament cutter 7 and a discharge vibration groove 14. Wherein:
and a tobacco cutter 7 provided between the sheet tobacco warming drum 6 and the tobacco dryer 8 and configured to cut the sheet tobacco into cut tobacco.
And a discharging vibration groove 14 which is arranged below the discharging port of the tobacco flake warming roller 6 and is configured to convey the tobacco flakes to the tobacco cutter 7. Wherein, the outlet moisture detector 15 is arranged on the discharging vibration groove 14. For example, the tapping chute 14 may be provided with a bracket for mounting the outlet moisture detector 15.
This embodiment can shake the in-process that send the slice cigarette material to filament cutter 7 through ejection of compact groove 14 and carry out moisture detection, and the slice cigarette material is comparatively loose this moment, and the distribution is more even, can dynamically accurately measure the slice cigarette moisture content of slice cigarette warming drum 6 discharge gate in succession.
In some embodiments, the water adding device 13 is located at an end near the feed opening along the axis of the tobacco sheet warming drum 6. The structure can compensate water after the tobacco sheet material enters the tobacco sheet heating roller 6, and the tobacco sheet material is uniformly mixed with the tobacco sheet in the process of reaching the discharge port in the tobacco sheet heating roller 6, so that the uniformity of water addition is improved, and the production quality of tobacco is ensured.
In some embodiments, the watering device 13 is provided with an opening regulating valve, and the controller 19 is configured to regulate the opening of the opening regulating valve by PID closed-loop feedback control to regulate the watering amount of the watering device 13.
According to the embodiment, after the control target value of the second water content is obtained according to the preset target value of the third water content, the first water content of the tobacco sheet material entering the tobacco sheet heating roller 6 is combined, the difference value between the first water content and the control target value is calculated, so that the initial water adding amount of the water adding device 13 is determined, and in the water adding process, negative feedback control is performed according to the deviation between the second water content of the tobacco sheet material output from the tobacco sheet heating roller 6 and the control target value, and the water adding amount is finely adjusted. The control method can improve the accuracy of the control of the second water content, complete the target of compensating the water adding handle, and finally realize the accurate regulation and control of the third water content at the inlet of the cut tobacco dryer 8.
In some embodiments, as shown in fig. 3, the tobacco-making production system further comprises:
a moisture detector 16 configured to detect ambient moisture;
a first temperature detector 17 configured to detect an ambient temperature; and
a second temperature detector configured to detect a temperature of the sheet tobacco output from the sheet tobacco warming drum 6;
wherein the controller 19 is configured to perform multiple regression analysis on the historical data set obtained by the detection by using the third water content as a dependent variable and the second water content, the ambient humidity, the ambient temperature and the temperature of the tobacco lamina output by the tobacco lamina warming drum 6 as independent variables to obtain a multiple regression equation so as to obtain a functional relationship between the third water content and the second water content.
Because the tobacco material that the tobacco slice warming drum 6 outputs receives the influence of environmental factor or material factor when getting into the cut-tobacco drier, the moisture content can change, consequently third moisture content is not equal with the second moisture content. The third moisture content of the tobacco shred materials entering the shred dryer is a target to be finally achieved, the third moisture content can be determined according to the process quality of the finally produced tobacco materials and can be used as a dependent variable, the second moisture content, the environmental humidity, the environmental temperature and the temperature of the tobacco flakes output by the tobacco flake warming roller 6 are all environmental factors influencing the third moisture content, then the control target value of the second moisture content is reversely deduced according to the function relation between the pre-obtained third moisture content and the second moisture content, and then the water adding amount of the tobacco flake warming roller 6 is obtained.
According to the embodiment, compensation water adding regulation is adopted, firstly, on the premise that the product process quality is not influenced, the water adding proportion of a batch of tobacco lamina loosening and moisture regaining link is regulated down within the range allowed by the process standard, an adjusting space is reserved for compensation water adding of a tobacco lamina heating link, and influences such as environmental factor fluctuation are responded; secondly, predicting the change of the moisture of the material from the tobacco sheet heating outlet to the cut tobacco drying inlet by combining material factors and environmental factors through multivariate regression analysis, and guiding the accurate setting of the moisture content of the tobacco sheet heating outlet.
In some embodiments, the controller 19 is configured to normalize the third moisture content, the second moisture content, the ambient humidity, the ambient temperature, and the historical data set of the tobacco lamina temperature output by the tobacco lamina warming drum 6, and convert all data to data between [0,1] prior to performing the multiple regression analysis.
According to the embodiment, through the normalization processing of each index, the phenomenon that the regression error is large due to the fact that the difference of the magnitude of the data is large can be avoided, and the functional relation between the third moisture content and the second moisture content can be obtained more accurately.
Secondly, this disclosure provides a tobacco material moisture content control method based on the tobacco shred production system of the above embodiment, in some embodiments, including:
step S110, adjusting the water adding proportion of the current batch of tobacco flakes in the loosening and conditioning roller 3 according to a preset proportion; the preset proportion can be obtained according to tests, not only a margin is reserved for compensating water for the tobacco sheet warming roller 6, but also the requirements of the loosening and moisture regaining roller 3 on the tobacco sheet process quality are not influenced, namely the water adding proportion is properly adjusted downward under the condition of meeting the requirement of unchanged sensory quality. For example, the watering proportion can be reduced by a preset step size and the sensory quality of the tobacco produced can be evaluated at each watering proportion to obtain a threshold set by the preset proportion.
Step S120, obtaining a control target value of the second water content according to a function relation between the pre-obtained third water content and the second water content and a preset target value which needs to be met by the third water content; when the tobacco material output by the tobacco sheet warming roller 6 enters the cut tobacco drier, the moisture content is changed due to the influence of environmental factors or material factors, so that the third moisture content is not equal to the second moisture content. The third moisture content of the cut tobacco material entering the cut tobacco dryer is the target to be finally achieved, the third moisture content can be determined according to the process quality of the finally produced tobacco material, and the control target value of the second moisture content is reversely deduced according to the function relation between the pre-obtained third moisture content and the second moisture content.
And S130, determining the water adding amount of the water adding device 13 according to the control target value of the second water content, the first water content of the current batch of the tobacco flakes and the detection value of the second water content.
Wherein steps S110-S130 are performed sequentially.
In some embodiments, the step S120 of pre-obtaining a functional relationship between the third moisture content and the second moisture content includes:
and step S120A, taking the third water content as a dependent variable, taking the second water content, the ambient humidity, the ambient temperature and the temperature of the tobacco lamina output by the tobacco lamina heating roller 6 as independent variables, and performing multiple regression analysis on the historical data set obtained through detection to obtain a multiple regression equation so as to obtain the functional relation between the third water content and the second water content.
Because the tobacco material that the tobacco slice warming drum 6 outputs receives the influence of environmental factor or material factor when getting into the cut-tobacco drier, the moisture content can change, consequently third moisture content is not equal with the second moisture content. The third moisture content of the tobacco shred materials entering the tobacco shred baking machine is the target to be finally achieved, the third moisture content can be determined according to the process quality of the finally produced tobacco materials, the third moisture content, the environmental humidity, the environmental temperature and the temperature of the tobacco flakes output by the tobacco flake warming roller 6 are all environmental factors influencing the third moisture content and used as dependent variables, then the control target value of the second moisture content is reversely deduced according to the function relation between the third moisture content and the second moisture content, and the water adding amount of the tobacco flake warming roller 6 is obtained.
In some embodiments, the step S120 of pre-obtaining the functional relationship between the third moisture content and the second moisture content further comprises:
step S120B, before the multiple regression analysis, normalization processing is carried out on the third moisture content, the second moisture content, the ambient humidity, the ambient temperature and the tobacco lamina temperature output by the tobacco lamina temperature-increasing roller 6, and all data are converted into data between [0,1 ].
Step 120B is performed before step 120A, and in this embodiment, by performing normalization processing on each index, it is possible to avoid a large regression error caused by a large difference in magnitude between data, so as to more accurately obtain a functional relationship between the third moisture content and the second moisture content.
In some embodiments, pre-obtaining the functional relationship between the third moisture content and the second moisture content further comprises:
before normalization processing, the historical data obtained from each production batch is classified according to product brands.
Step 120C is performed before step 120B, and steps 120A-120C are not illustrated in the figure. The embodiment classifies the historical data of the tobaccos with different product grades to establish a corresponding functional relation between the third moisture content and the second moisture content for the tobaccos with different product grades, so that the water adding compensation amount is more accurately determined for the batch of tobaccos.
In some embodiments, the tobacco shred production system comprises a driving component configured to drive the conveying component 9 to operate and adopt variable frequency speed regulation control; the method for controlling the moisture content of the tobacco material further comprises the following steps:
in the production process of the current batch of tobacco flakes, the flow of the tobacco flakes at the feed inlet of the tobacco flake temperature-increasing roller 6 is kept constant by adjusting the control frequency of the driving part.
Because the flow of the tobacco sheet material provided by the tobacco storage cabinet 5 can change, the running speed of the conveying part 9 is adjusted through variable-frequency speed regulation, so that the flow of the tobacco sheet material entering the tobacco sheet warming drum 6 is kept unchanged, therefore, the water adding amount of the water adding device 13 in unit time can be kept at a certain level in the production process of the current batch of tobacco sheets, the opening regulating valve of the water adding device 13 is not required to be frequently and greatly adjusted, the phenomenon that water adding is not uniform due to the fact that the opening regulating valve is greatly adjusted, the water adding amount is enabled to have errors can be prevented, the uniformity and accuracy of the water adding amount are improved, and the quality of tobacco production is ensured.
The Controller 19 described in this disclosure may be a general purpose Processor, a Programmable Logic Controller (PLC), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable Logic device, discrete Gate or transistor Logic, discrete hardware components, or any suitable combination thereof for performing the functions described in this disclosure.
The above description is only exemplary of the present disclosure and is not intended to limit the present disclosure, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (11)
1. A tobacco cut-making production system, comprising:
a loosening and conditioning roller (3) which is configured to loosen the tobacco sheet and heat and humidify the tobacco sheet;
a tobacco sheet warming drum (6) arranged at the downstream of the loosening and moisture regaining drum (3) and configured to warm tobacco sheets, wherein the tobacco sheets entering the tobacco sheet warming drum (6) have a first water content, the tobacco sheets output from the tobacco sheet warming drum (6) have a second water content, and a water adding device (13) is arranged in the tobacco sheet warming drum (6) and configured to add water to the tobacco sheets in the tobacco sheet warming drum (6);
the cut tobacco dryer (8) is arranged at the downstream of the tobacco sheet warming roller (6) and is configured to dry cut tobacco formed by the tobacco sheets, and the cut tobacco entering the cut tobacco dryer (8) has a third moisture content;
an inlet moisture detector (12) and an outlet moisture detector (15) configured to detect values of the first and second moisture content, respectively;
a moisture detector (16) configured to detect ambient moisture;
a first temperature detector (17) configured to detect an ambient temperature;
a second temperature detector configured to detect a temperature of the lamina output from the lamina warming drum (6); and
a controller (19) configured to perform multiple regression analysis on the historical data set obtained through detection by using the third water content as a dependent variable and the second water content, the ambient humidity, the ambient temperature and the temperature of the tobacco lamina output by the tobacco lamina warming drum (6) as independent variables to obtain a multiple regression equation so as to obtain a functional relation between the third water content and the second water content; and the water adding proportion of the current batch of tobacco flakes in the loosening and conditioning roller (3) is adjusted downwards according to a preset proportion, a control target value of the second water content is obtained according to a function relation between the third water content and the second water content which are obtained in advance and a preset target value which needs to be met by the third water content, and the water adding amount of the water adding device (13) is determined by combining the first water content and the second water content of the current batch of tobacco flakes.
2. The tobacco-making production system according to claim 1, further comprising:
a leaf storage cabinet (5) arranged between the loosening and moisture regaining roller (3) and the tobacco sheet warming roller (6) and configured to store tobacco sheets;
the conveying component (9) is configured to convey the tobacco flake materials output by the tobacco flake storage cabinet (5), and a material homogenizer (10) is arranged above the conveying component (9) and is configured to limit the spreading height on the conveying component (9); and
the feeding vibration groove (11) is arranged at the downstream of the conveying component (9), the feeding end of the feeding vibration groove (11) is positioned below the discharging end of the conveying component (9), and the feeding vibration groove is configured to enable the tobacco flakes to enter the tobacco flake warming drum (6);
wherein, the inlet moisture detector (12) is arranged on the feeding vibration groove (11).
3. A tobacco throwing production system according to claim 2, further comprising a driving unit configured to drive said conveying unit (9) to operate and controlled by variable frequency speed regulation;
wherein the controller (19) is configured to keep the flow rate of the tobacco lamina material at the feeding hole of the tobacco lamina warming drum (6) constant by adjusting the control frequency of the driving part in the production process of the current batch of tobacco lamina.
4. The tobacco-making production system according to claim 1, further comprising:
a tobacco cutter (7) provided between the tobacco sheet warming drum (6) and the tobacco dryer (8) and configured to cut tobacco sheets into cut tobacco; and
a discharging vibration groove (14) which is arranged below the discharging port of the tobacco sheet warming roller (6) and is configured to convey tobacco sheets to the tobacco cutter (7);
wherein, the outlet moisture detector (15) is arranged on the discharging vibration groove (14).
5. A tobacco cut-making production system according to claim 1, wherein the watering device (13) is located at an end near the inlet along the axis of the tobacco sheet warming drum (6).
6. A cut-tobacco production system according to claim 1, wherein the watering device (13) is provided with an opening degree adjusting valve, and the controller (19) is configured to control the opening degree of the opening degree adjusting valve by PID closed loop feedback to adjust the watering amount of the watering device (13).
7. A tobacco cut-tobacco production system according to claim 1, wherein the controller (19) is configured to normalize the third moisture content, the second moisture content, the ambient humidity, the ambient temperature and the historical set of lamina temperature data output by the lamina warming drum (6) prior to performing a multiple regression analysis, converting all data to data between [0,1 ].
8. A method for controlling the moisture content of tobacco materials based on the tobacco shred production system of any one of claims 1 to 7, the method comprising the following steps:
the water adding proportion of the current batch of tobacco flakes in the loosening and conditioning roller (3) is adjusted downwards according to the preset proportion;
obtaining a control target value of the second moisture content according to a pre-obtained function relation between the third moisture content and the second moisture content and a preset target value which needs to be met by the third moisture content;
and determining the water adding proportion of the water adding device (13) according to the control target value of the second water content, the first water content of the current batch of the tobacco flakes and the detection value of the second water content.
9. The method of claim 8, wherein pre-obtaining a functional relationship between the third moisture content and the second moisture content comprises:
and performing multiple regression analysis on a historical data set obtained through detection by taking the third water content as a dependent variable and the second water content, the ambient humidity, the ambient temperature and the temperature of the tobacco lamina output by the tobacco lamina heating roller (6) as independent variables to obtain a multiple regression equation so as to obtain a functional relation between the third water content and the second water content.
10. The method of claim 9, wherein pre-obtaining a functional relationship between the third moisture content and the second moisture content further comprises:
before performing multiple regression analysis, performing normalization processing on the third moisture content, the second moisture content, the ambient humidity, the ambient temperature and the temperature of the tobacco lamina output by the tobacco lamina heating roller (6), and converting all data into data between [0,1 ].
11. The method of claim 10, wherein pre-obtaining a functional relationship between the third moisture content and the second moisture content further comprises:
before normalization processing, the historical data obtained from each production batch is classified according to product brands.
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| CN114847505B (en) * | 2022-05-25 | 2023-06-16 | 湖北中烟工业有限责任公司 | Homogenizing processing method and device for tobacco leaf shredding |
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