CN115444158B - Tobacco redrying method, system, device and computer readable storage medium - Google Patents
Tobacco redrying method, system, device and computer readable storage medium Download PDFInfo
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- CN115444158B CN115444158B CN202211181661.XA CN202211181661A CN115444158B CN 115444158 B CN115444158 B CN 115444158B CN 202211181661 A CN202211181661 A CN 202211181661A CN 115444158 B CN115444158 B CN 115444158B
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- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 289
- 238000000034 method Methods 0.000 title claims abstract description 69
- 238000003860 storage Methods 0.000 title claims abstract description 24
- 244000061176 Nicotiana tabacum Species 0.000 title 1
- 241000208125 Nicotiana Species 0.000 claims abstract description 288
- 238000001035 drying Methods 0.000 claims abstract description 126
- 238000001816 cooling Methods 0.000 claims abstract description 105
- 230000003750 conditioning effect Effects 0.000 claims abstract description 41
- 230000033228 biological regulation Effects 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 238000004590 computer program Methods 0.000 claims description 11
- 230000001276 controlling effect Effects 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 24
- 238000012545 processing Methods 0.000 abstract description 5
- 230000009125 negative feedback regulation Effects 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 7
- 235000019505 tobacco product Nutrition 0.000 description 6
- 238000012797 qualification Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000013072 incoming material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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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
- A24B3/10—Roasting or cooling 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
- A24B3/04—Humidifying or drying tobacco bunches or cut 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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Manufacture Of Tobacco Products (AREA)
Abstract
The invention discloses a tobacco redrying method, a tobacco redrying system, a tobacco redrying device and a computer readable storage medium, and relates to the field of tobacco processing. Carrying out negative feedback regulation on the temperature of the drying area based on the preset ideal drying temperature of the drying area and the actual drying temperature of the drying area to finish the tobacco leaf drying process; carrying out negative feedback adjustment on the temperature of the cooling zone based on the preset ideal cooling temperature of the cooling zone and the actual cooling temperature of the cooling zone to finish the tobacco leaf cooling process; and determining the current state of the tobacco based on the actual moisture content of the tobacco currently output by the moisture regain zone, and then selecting a corresponding regulation and control mode according to the current state to regulate the humidity of the moisture regain zone, so that the state of the tobacco output after the moisture regain zone is a qualified state. Therefore, the method and the device can realize automatic control of tobacco leaf drying, tobacco leaf cooling and tobacco leaf conditioning, and select different regulation and control modes aiming at different states of tobacco leaves so as to control the moisture content of finished tobacco leaves more accurately.
Description
Technical Field
The invention relates to the technical field of tobacco leaf processing, in particular to a tobacco leaf redrying method, a tobacco leaf redrying system, a tobacco leaf redrying device and a computer readable storage medium.
Background
The tobacco redrying refers to the process that tobacco leaves and a heat conduction medium with certain temperature, humidity, pressure and flow rate are subjected to heat exchange in the process of relative movement, so that different processes of tobacco leaf drying, tobacco leaf cooling, tobacco leaf conditioning and the like are completed. The tobacco redrying generally adopts assembly line operation, raw tobacco leaves are conveyed to a drying area from the front end of a production line, the drying area enables the temperature of the raw tobacco leaves to rise, moisture is evaporated, the drying area adjusts the moisture content of the raw tobacco leaves to be 8% -10%, then the raw tobacco leaves are output to a cooling area, then the cooling area cools the tobacco leaves to enable the tobacco leaves to enter a moisture regaining area for preparation, and the moisture regaining area controls the tobacco leaves to be moisture regained, so that the moisture content of the tobacco leaves rises to 11% -12%. The temperature, humidity and pressure of any process in the processes of tobacco leaf drying, tobacco leaf cooling and tobacco leaf resurgence change can influence the subsequent process, so that the tobacco leaf redrying process has the characteristics of nonlinearity, large hysteresis and strong coupling among variables, the mode of manually regulating and controlling the temperature, humidity and other influencing factors in the tobacco leaf redrying process in the prior art is easy to be interfered by the outside, and the control of the moisture content of a tobacco leaf finished product is not accurate enough.
Disclosure of Invention
The invention aims to provide a tobacco redrying method, a tobacco redrying system, a tobacco redrying device and a computer readable storage medium, which can realize automatic control of tobacco drying, tobacco cooling and tobacco conditioning, and select different regulation and control modes aiming at different states of tobacco so as to control the moisture content of a finished tobacco product more accurately.
In order to solve the technical problems, the invention provides a tobacco redrying method, which comprises the following steps:
negative feedback adjustment is carried out on the temperature of the drying zone based on the preset ideal drying temperature of the drying zone and the actual drying temperature of the drying zone;
negative feedback adjustment is carried out on the temperature of the cooling zone based on the preset ideal cooling temperature of the cooling zone and the actual cooling temperature of the cooling zone;
determining the current state of tobacco leaves based on the actual moisture content of the tobacco leaves currently output by a moisture regain zone, wherein the current state comprises a qualified state and a warning state;
and selecting a corresponding regulation and control mode according to the current state of the tobacco leaves to regulate the humidity of the conditioning area, so that the state of the tobacco leaves output after the conditioning area is the qualified state.
Preferably, the alert state includes a light alert state and a high alert state;
determining the current state of the tobacco based on the actual moisture content of the tobacco currently output by the conditioning area, wherein the determining comprises the following steps:
determining the absolute value of the difference between the actual water content and the water content of an ideal moisture regain area;
when the absolute value of the difference value is smaller than a first preset threshold value, determining that the current state of the tobacco leaves is the qualified state;
when the absolute value of the difference value is larger than the first preset threshold value and smaller than a second preset threshold value, determining that the current state of the tobacco leaves is the light warning state;
when the absolute value of the difference value is larger than the second preset threshold value, determining that the current state of the tobacco leaves is the high-vigilance state;
selecting a corresponding regulation and control mode according to the current state of the tobacco leaves to regulate the humidity of the conditioning area, wherein the method comprises the following steps:
when the current state of the tobacco leaves is the light warning state, the working frequency of a high-pressure water pump of the moisture regaining area is regulated in a proportional-integral-derivative mode so as to regulate the humidity of the moisture regaining area;
and when the current state of the tobacco leaves is the high-warning state, the humidity of the conditioning area is adjusted by adjusting the opening number of the atomizing nozzles of the conditioning area.
Preferably, the negative feedback adjustment of the temperature of the drying zone is performed based on a preset ideal drying temperature of the drying zone and an actual drying temperature of the drying zone, including:
adjusting the switching degree of a steam valve of the drying zone through a proportional-integral-derivative controller based on the preset ideal drying temperature and the actual drying temperature;
and carrying out negative feedback adjustment on the temperature of the cooling zone based on the preset ideal cooling temperature of the cooling zone and the actual cooling temperature of the cooling zone, wherein the negative feedback adjustment comprises the following steps:
and adjusting the switching degree of a steam valve of the cooling zone through the proportional-integral-derivative controller based on the preset ideal cooling temperature and the actual cooling temperature.
Preferably, when determining that the current state of the tobacco leaves in the moisture-regaining zone is a disqualified state based on the actual moisture content of the tobacco leaves in the moisture-regaining zone, the method further comprises:
and outputting the tobacco leaves with the current state being the unqualified state to a leaf storage cabinet so that the leaf storage cabinet can carry out corresponding treatment on the tobacco leaves with the current state being the unqualified state.
Preferably, when the current state of the tobacco leaves in the moisture regaining area is the qualified state, the method further comprises:
and controlling the packing device to pack and encase the tobacco leaves with the current state being the qualified state.
Preferably, before determining the current state of the tobacco leaf based on the actual moisture content of the tobacco leaf currently output by the conditioning area, the method further comprises:
and detecting an average value of the moisture content of the tobacco leaves output by the conditioning area in a preset time period, and taking the average value as the actual moisture content of the tobacco leaves currently output by the conditioning area.
The invention also provides a tobacco redrying system for solving the technical problems, which comprises:
the drying zone adjusting unit is used for carrying out negative feedback adjustment on the temperature of the drying zone based on the preset ideal drying temperature of the drying zone and the actual drying temperature of the drying zone;
the cooling zone adjusting unit is used for carrying out negative feedback adjustment on the temperature of the cooling zone based on the preset ideal cooling temperature of the cooling zone and the actual cooling temperature of the cooling zone;
a tobacco leaf state determining unit, configured to determine a current state of tobacco leaf based on an actual moisture content of tobacco leaf currently output by a moisture regain zone, where the current state includes a qualified state and an alert state;
and the conditioning unit of the conditioning area is used for selecting a corresponding regulation and control mode according to the current state of the tobacco leaves to regulate the humidity of the conditioning area, so that the state of the tobacco leaves output after the conditioning area is the qualified state.
The invention also provides a tobacco redrying device for solving the technical problems, which comprises:
a memory for storing a computer program;
and the processor is used for realizing the steps of the tobacco redrying method when executing the computer program.
Preferably, the device also comprises a high-pressure water pump arranged in the moistureproof region, an atomizing nozzle arranged in the moistureproof region and a filter arranged at the water inlet of the atomizing nozzle.
The invention also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program realizes the steps of the tobacco redrying method when being executed by a processor.
The invention provides a tobacco redrying method, a tobacco redrying system, a tobacco redrying device and a computer readable storage medium, wherein the tobacco redrying method comprises the steps of firstly carrying out negative feedback adjustment on the temperature of a drying area based on the preset ideal drying temperature of the drying area and the actual drying temperature of the drying area to finish the tobacco drying process; carrying out negative feedback adjustment on the temperature of the cooling zone based on the preset ideal cooling temperature of the cooling zone and the actual cooling temperature of the cooling zone to finish the tobacco leaf cooling process; determining the current state of the tobacco based on the actual moisture content of the tobacco currently output by the moisture regain zone, wherein the current state comprises a qualified state and an alert state, and then, according to the current state, selecting a corresponding regulation and control mode to adjust the humidity of the moisture regain zone, so that the state of the tobacco output after the moisture regain zone is the qualified state. Therefore, the automatic control of tobacco leaf drying, tobacco leaf cooling and tobacco leaf conditioning can be realized, and different regulation and control modes are selected according to different states of tobacco leaves, so that the control of the moisture content of the finished tobacco leaves is more accurate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a tobacco redrying method provided by the invention;
FIG. 2 is a flow chart of another tobacco redrying method provided by the invention;
FIG. 3 is a schematic diagram of a tobacco redrying system according to the present invention;
fig. 4 is a schematic structural view of a tobacco redrying device provided by the invention.
Detailed Description
The core of the invention is to provide a tobacco redrying method, a system, a device and a computer readable storage medium, which can realize automatic control of tobacco drying, tobacco cooling and tobacco conditioning, and select different regulation and control modes aiming at different states of tobacco so as to control the moisture content of a finished tobacco product more accurately.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a flowchart of a tobacco redrying method provided by the invention, the method includes:
s1: negative feedback adjustment is carried out on the temperature of the drying area based on the preset ideal drying temperature of the drying area and the actual drying temperature of the drying area;
because the tobacco redrying process has the characteristics of nonlinearity, large hysteresis and strong coupling among variables, in the prior art, workers usually rely on abundant experience to manually regulate and control the temperature, humidity and other influence parameters of a drying area, a cooling area and a moistureproof area in the tobacco redrying process, but the mode is easy to be interfered by the outside, the technical requirements on workers are high, and the control on the moisture content of tobacco finished products is not accurate enough.
Therefore, the drying zone, the cooling zone and the moisture regain zone are respectively subjected to automatic negative feedback control according to each parameter affecting the moisture content of tobacco leaves in the drying zone, the cooling zone and the moisture regain zone. The negative feedback control is a control process of comparing the output quantity information with the reference input quantity information and adjusting the control object by utilizing the deviation of the output quantity information and the reference input quantity information.
Specifically, when negative feedback control is performed on the drying area, the output quantity information is the actual drying temperature of the drying area, and the reference input quantity information is the preset ideal drying temperature of the drying area. The preset ideal drying temperature may be set according to the moisture content of the raw tobacco leaves input into the drying area and the actual moisture content of the tobacco leaves output from the drying area, which is not particularly limited in this application, and for example, the moisture content of the tobacco leaves in the drying area can be 8% -10% when the temperature of the drying area is the preset ideal drying temperature.
The control process of performing negative feedback control on the temperature of the drying area is specifically to perform negative feedback adjustment on the temperature of the drying area based on the difference between the actual drying temperature and the preset ideal drying temperature. For example, the opening degree of the steam valve for drying in the drying zone is controlled to be reduced when the actual drying temperature is higher than the preset ideal drying temperature, and the opening degree of the steam valve for drying in the drying zone is controlled to be increased when the actual drying temperature is lower than the preset ideal drying temperature until the switching degree of the steam valve stops changing when the actual drying temperature is stabilized at the preset ideal drying temperature.
In sum, the temperature of the drying zone is controlled in a negative feedback mode in the application, so that the effect of simplicity in control, stability in control and accuracy in control is achieved, the phenomenon of excessive drying or impermeable baking is avoided, and preparation is made for a subsequent cooling zone of tobacco leaves.
S2: negative feedback adjustment is carried out on the temperature of the cooling zone based on the preset ideal cooling temperature of the cooling zone and the actual cooling temperature of the cooling zone;
in the present application, the control process of performing negative feedback control on the cooling area specifically performs negative feedback control on the temperature of the cooling area based on the difference between the actual cooling temperature and the preset ideal cooling temperature. The preset ideal cooling temperature may be set according to practical situations, and is not particularly limited in this application.
The temperature of the cooling zone is controlled in a negative feedback mode in the application, so that the control is simple, the control is stable and the control is accurate, and preparation is made for tobacco leaves entering the moistureproof zone.
S3: determining the current state of tobacco based on the actual moisture content of the tobacco currently output by the moisture regain zone, wherein the current state comprises a qualified state and a warning state;
the main purpose of the moistureproof area is to enable the moisture content of tobacco leaves conveyed by the cooling area to rise to 11% -12% by adjusting high-pressure atomization of the pump and combining with mixed water adjustment, the humidity of the moistureproof area has great influence on tobacco leaf finished products, the moisture content of the moistureproof area is too high, the phenomenon that the finished tobacco leaves are easy to mildew is caused by too high moisture content of the moistureproof area, and the moisture content of the moistureproof area is too low, so that the tobacco leaves are fragile. Therefore, the humidity of the conditioning area is regulated and controlled more accurately by adopting a multiple control strategy. In order to achieve the above purpose, it is first required to determine the current state of the tobacco according to the moisture content of the tobacco currently output by the moisture regain zone, and infer whether the current humidity of the moisture regain zone is appropriate by judging the current state of the tobacco currently output by the moisture regain zone. Specifically, in this embodiment, the current state of the tobacco leaf includes a qualified state and an alert state, and the alert state indicates that the moisture content of the tobacco leaf currently output is not in compliance with the specification, and may be relatively dry or relatively wet.
S4: and (3) selecting a corresponding regulation and control mode according to the current state of the tobacco leaves, and regulating the humidity of the moisture regaining area to enable the state of the tobacco leaves output after the moisture regaining area to be a qualified state.
In this embodiment, after determining the current state of the tobacco leaves currently output by the moisture regaining region, different regulation and control modes are selected according to different states of the tobacco leaves. For example, when the current state of the tobacco leaves is the alert state, determining that the tobacco leaves are in a slightly dry state further based on the moisture content of the tobacco leaves, and at this time, gradually increasing the humidity of the moisture regain zone by increasing the frequency of the high-pressure water pump of the moisture regain zone so that the moisture content of the tobacco leaves output after the moisture regain zone meets the standard, wherein the adjustment process is slow but accurate; when the tobacco leaves are further determined to be in moderate drying based on the moisture content of the tobacco leaves, the opening number of the atomizing nozzles in the moisture regaining area is increased at the moment, so that the moisture content of the tobacco leaves output after the moisture regaining area is increased rapidly, the moisture content of the tobacco leaves output after the moisture regaining area meets the standard, the adjusting process is not very accurate, the adjusting speed is high, and a large amount of unqualified tobacco leaves are avoided. The key point of the embodiment is that the most suitable regulation and control mode is selected according to the current state of tobacco leaves to regulate the humidity of a moisture-regaining area, for example, the regulation and control mode with high regulation and control speed or the regulation and control mode with accurate regulation and control is selected, the water content control capability of finished tobacco leaves is improved, the qualification rate of tobacco leaf quality is improved, and the economic benefit of tobacco leaf redrying is improved.
In summary, the invention provides a tobacco redrying method, which comprises the steps of firstly carrying out negative feedback adjustment on the temperature of a drying area based on the preset ideal drying temperature of the drying area and the actual drying temperature of the drying area to finish the tobacco drying process; carrying out negative feedback adjustment on the temperature of the cooling zone based on the preset ideal cooling temperature of the cooling zone and the actual cooling temperature of the cooling zone to finish the tobacco leaf cooling process; determining the current state of the tobacco based on the actual moisture content of the tobacco currently output by the moisture regain zone, wherein the current state comprises a qualified state and an alert state, and then, according to the current state, selecting a corresponding regulation and control mode to adjust the humidity of the moisture regain zone, so that the state of the tobacco output after the moisture regain zone is the qualified state. Therefore, the automatic control of tobacco leaf drying, tobacco leaf cooling and tobacco leaf conditioning can be realized, and different regulation and control modes are selected according to different states of tobacco leaves, so that the control of the moisture content of the finished tobacco leaves is more accurate, the control capability of the moisture content of the finished tobacco leaves is improved, the qualification rate of the tobacco leaf quality is improved, and the economic benefit of tobacco leaf redrying is improved.
Based on the above embodiments:
as a preferred embodiment, the alert state includes a light alert state and a high alert state;
determining a current state of tobacco based on an actual moisture content of the tobacco currently output by the conditioning zone, including:
determining the absolute value of the difference between the actual water content and the water content of the ideal conditioning area;
when the absolute value of the difference value is smaller than a first preset threshold value, determining that the current state of the tobacco leaves is a qualified state;
when the absolute value of the difference value is larger than a first preset threshold value and smaller than a second preset threshold value, determining that the current state of the tobacco leaves is a light warning state;
when the absolute value of the difference value is larger than a second preset threshold value, determining that the current state of the tobacco leaves is a high warning state;
the humidity of the moistureproof area is regulated by selecting a corresponding regulation and control mode according to the current state of tobacco leaves, and the method comprises the following steps:
when the current state of the tobacco leaves is a light warning state, the working frequency of a high-pressure water pump in the moistureproof region is regulated in a proportional-integral-derivative mode so as to regulate the humidity of the moistureproof region;
when the current state of the tobacco leaves is a high-warning state, the humidity of the moisture-regaining area is adjusted by adjusting the opening number of the atomizing nozzles of the moisture-regaining area.
In order to further improve the control accuracy of the moisture content of the tobacco leaves in the embodiment, the current state of the tobacco leaves is further divided into a light warning state and a high warning state, and different regulation and control modes are selected according to the light warning state and the high warning state.
Firstly, determining an absolute value of a difference value between the actual moisture content of tobacco leaves and the moisture content of an ideal moisture regain zone of a tobacco leaf finished product output by a moisture regain zone, wherein the absolute value reflects the deviation of the actual moisture content of the tobacco leaves and the moisture content of the ideal moisture regain zone of the tobacco leaf finished product output by the moisture regain zone. When the absolute value of the difference value is smaller than a first preset threshold value, comparing the actual value with the ideal value, and determining that the current state of the tobacco leaves is a qualified state; when the absolute value of the difference value is larger than the first preset threshold value and smaller than the second preset threshold value, a smaller deviation is proved between the actual value and the ideal value, the current state of the tobacco leaves is determined to be a light warning state, and whether the tobacco leaves are dry or wet can be judged according to the positive and negative of the difference value, so that the application is not particularly limited; when the absolute value of the difference value is larger than a second preset threshold value, the deviation between the actual value and the ideal value is proved to be larger, and the current state of the tobacco leaves is determined to be a high-warning state.
Referring to fig. 2, fig. 2 is a flowchart of another tobacco redrying method according to the present invention. When the current state of the tobacco leaves is determined to be a light warning state, the humidity of the moisture regain region can be regulated and controlled at the time of accurate regulation although the regulation speed is relatively low, specifically, in the embodiment, the mode of regulating the working frequency of the high-pressure water pump of the moisture regain region in a proportional-integral-differential mode is selected to regulate the humidity of the moisture regain region. The operation frequency of the high-pressure water pump is adjusted to be higher or lower depending on the positive or negative condition of the difference between the actual water content of the tobacco leaves and the water content of the ideal conditioning area.
When the current state of the tobacco leaves is determined to be a high-alert state, the humidity of the moisture regain zone can be regulated and controlled in a mode of relatively high regulating speed, and specifically, in the embodiment, the number of the atomizing nozzles in the moisture regain zone is selected to be regulated so as to regulate the humidity of the moisture regain zone. The number of the atomization nozzles which are opened is increased or decreased depending on the difference between the actual moisture content of the tobacco leaves and the moisture content of the ideal moisture regain zone.
In summary, in this embodiment, the current state of the tobacco is further divided into a light alert state and a high alert state, and different regulation and control modes are selected for the light alert state and the high alert state, so that the control of the moisture content of the finished tobacco product is more accurate, the control capability of the moisture content of the finished tobacco product is improved, the qualification rate of the tobacco quality is improved, and the economic benefit of redrying the tobacco is improved.
As a preferred embodiment, the negative feedback adjustment of the temperature of the drying zone based on the preset desired drying temperature of the drying zone and the actual drying temperature of the drying zone comprises:
adjusting the switching degree of a steam valve of the drying area through a proportional-integral-derivative controller based on a preset ideal drying temperature and an actual drying temperature;
negative feedback adjustment is carried out on the temperature of the cooling zone based on the preset ideal cooling temperature of the cooling zone and the actual cooling temperature of the cooling zone, and the negative feedback adjustment comprises the following steps:
the switching degree of the steam valve of the cooling zone is adjusted by a proportional-integral-derivative controller based on a preset ideal cooling temperature and an actual cooling temperature.
In this embodiment, the negative feedback adjustment of the temperature of the drying zone is specifically implemented by adjusting the opening and closing degree of the steam valve of the drying zone in a proportional-integral-derivative manner based on a preset ideal drying temperature and an actual drying temperature. The negative feedback adjustment of the temperature of the cooling zone is specifically realized by adjusting the switching degree of a steam valve of the cooling zone in a proportional-integral-derivative mode based on a preset ideal cooling temperature and an actual cooling temperature. The proportional-integral-differential control has the advantages of simple control method, good robustness and high reliability, and the control of the moisture content of the finished tobacco products can be more accurate by applying the proportional-integral-differential control to the tobacco redrying process, so that the control capability of the moisture content of the finished tobacco products is improved, the qualification rate of the tobacco quality is improved, and the economic benefit of tobacco redrying is improved.
In addition, the process of setting the parameters of the integral derivative of the comparative example before the proportional integral derivative control is not particularly limited in this application, and the parameters of the integral derivative of the comparative example can be set according to the physical characteristics of the tobacco leaf incoming material, the chemical characteristics of the tobacco leaf incoming material, the tobacco leaf flow rate and other parameters.
As a preferred embodiment, when determining that the current state of the tobacco leaves in the moisture-regaining zone is a failure state based on the actual moisture content of the tobacco leaves in the moisture-regaining zone, the method further comprises:
and outputting the tobacco leaves with the unqualified current state to a leaf storage cabinet so as to correspondingly treat the tobacco leaves with the unqualified current state by the leaf storage cabinet.
Referring to fig. 2, fig. 2 is a flowchart of another tobacco redrying method according to the present invention. In this embodiment, when the actual moisture content of the tobacco leaves output by the moisture regain zone is too high or too low, for example, when the absolute value of the difference between the actual moisture content of the tobacco leaves and the moisture content of the ideal moisture regain zone is greater than a third preset threshold, it is determined that the tobacco leaves output by the moisture regain zone at present are in a disqualified state, wherein the third preset threshold is greater than the second preset threshold. When the tobacco leaves output in the moistureproof area at present are determined to be in an unqualified state and are not in a qualified range required to be processed by customers, the tobacco leaves in the unqualified state are required to be output into a leaf storage cabinet, and the leaf storage cabinet can further process the tobacco leaves in the unqualified state, so that automatic control of tobacco leaf drying, cooling, moistureproof and unqualified processing is realized.
As a preferred embodiment, when the current state of the tobacco leaves in the moisture regaining region is a qualified state, the method further comprises:
and controlling the packing device to pack and encase the tobacco leaves with the current state being the qualified state.
Referring to fig. 2, fig. 2 is a flowchart of another tobacco redrying method according to the present invention. In the embodiment, when the current state of the tobacco leaves in the moisture regaining area is determined to be a qualified state, the moisture content of the tobacco leaves output after the moisture regaining area is proved to be within the qualified range required by customers, so that the tobacco leaves output in the moisture regaining area can be packaged and boxed, and the full-automatic processes of tobacco leaf drying, cooling, moisture regaining and packaging and boxing are realized.
As a preferred embodiment, before determining the current state of the tobacco based on the actual moisture content of the tobacco currently output by the conditioning zone, the method further comprises:
and detecting an average value of the moisture content of the tobacco leaves output by the moistureproof region in a preset time period, and taking the average value as the actual moisture content of the tobacco leaves currently output by the moistureproof region.
In order to ensure the accuracy of judging the current state of the tobacco, in the embodiment, before determining the current state of the tobacco based on the actual moisture content of the tobacco currently output by the moisture regain zone, firstly detecting the average value of the moisture content of the tobacco output by the moisture regain zone in a preset time period, and then taking the average value as the actual moisture content of the tobacco currently output by the moisture regain zone, the influence of abnormal values caused by the abnormality of the moisture detecting device can be reduced, the control of the moisture content of the tobacco finished product is ensured to be more accurate, the control capability of the moisture content of the tobacco finished product is improved, the qualification rate of the tobacco quality is improved, and the economic benefit of tobacco redrying is improved.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a tobacco redrying system according to the present invention, where the tobacco redrying system includes:
a drying zone adjusting unit 1 for performing negative feedback adjustment on the temperature of the drying zone based on a preset ideal drying temperature of the drying zone and an actual drying temperature of the drying zone;
a cooling zone adjusting unit 2 for performing negative feedback adjustment on the temperature of the cooling zone based on a preset ideal cooling temperature of the cooling zone and an actual cooling temperature of the cooling zone;
a tobacco state determining unit 3 for determining a current state of tobacco based on an actual moisture content of the tobacco currently output by the moisture regain zone, wherein the current state includes a qualified state and a warning state;
and the conditioning unit 4 is used for selecting a corresponding regulation mode according to the current state of the tobacco leaves to regulate the humidity of the conditioning area so that the state of the tobacco leaves output after the conditioning area is a qualified state.
For the related description of the tobacco redrying system provided by the present invention, reference is made to the embodiment of the tobacco redrying method, and details are not described herein.
Based on the above embodiments:
as a preferred embodiment, the alert state includes a light alert state and a high alert state;
the tobacco leaf status determining unit 3 includes:
a determining unit for determining an absolute value of a difference between the actual water content and the water content of the ideal conditioning area;
the qualified state determining unit is used for determining that the current state of the tobacco leaves is a qualified state when the absolute value of the difference value is smaller than a first preset threshold value;
the light warning state determining unit is used for determining that the current state of the tobacco leaves is a light warning state when the absolute value of the difference value is larger than a first preset threshold value and smaller than a second preset threshold value;
the high warning state determining unit is used for determining that the current state of the tobacco leaves is a high warning state when the absolute value of the difference value is larger than a second preset threshold value;
the moisture regain region adjustment unit 4 includes:
the low warning adjusting unit is used for adjusting the working frequency of the high-pressure water pump in the moistureproof region in a proportional-integral-derivative mode when the current state of the tobacco leaves is a low warning state so as to adjust the humidity of the moistureproof region;
and the high warning adjusting unit is used for adjusting the humidity of the moisture-regaining area by adjusting the opening number of the atomizing nozzles of the moisture-regaining area when the current state of the tobacco leaves is the high warning state.
As a preferred embodiment, the drying zone adjustment unit 1 is specifically for:
adjusting the switching degree of a steam valve of the drying area through a proportional-integral-derivative controller based on a preset ideal drying temperature and an actual drying temperature;
the cooling zone adjusting unit 2 is specifically configured to:
the switching degree of the steam valve of the cooling zone is adjusted by a proportional-integral-derivative controller based on a preset ideal cooling temperature and an actual cooling temperature.
As a preferred embodiment, further comprising:
and the disqualification processing unit is used for outputting the tobacco leaves with the unqualified current state to the leaf storage cabinet when the current state of the tobacco leaves in the moisture-regaining area is determined to be the unqualified state based on the actual moisture content of the tobacco leaves in the moisture-regaining area, so that the leaf storage cabinet can correspondingly process the tobacco leaves with the unqualified current state.
As a preferred embodiment, further comprising:
and the qualified processing unit is used for controlling the packing device to pack and encase the tobacco leaves with the current state being the qualified state when the current state of the tobacco leaves in the moisture regain area is the qualified state.
As a preferred embodiment, further comprising:
the actual moisture content determining unit is used for detecting the average value of the moisture content of the tobacco leaves output by the moisture regaining area in a preset time period before determining the current state of the tobacco leaves based on the actual moisture content of the tobacco leaves output by the moisture regaining area at present, and taking the average value as the actual moisture content of the tobacco leaves output by the moisture regaining area at present.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a tobacco redrying device according to the present invention, where the device includes:
a memory 5 for storing a computer program;
and a processor 6 for implementing the steps of the tobacco redrying method when executing the computer program.
For the related description of the tobacco redrying device provided by the present invention, reference is made to the embodiment of the tobacco redrying method, and details are not described herein.
Based on the above embodiments:
as a preferred embodiment, the device further comprises a high-pressure water pump arranged in the moistureproof region, an atomizing nozzle arranged in the moistureproof region and a filter arranged at the water inlet of the atomizing nozzle.
In this embodiment, the filter is additionally installed on the water inlet and outlet of the atomizing nozzle, and the specific model of the filter is not particularly limited in this application, aiming at the problem of the blockage of the atomizing nozzle which is easy to occur in the tobacco redrying process.
The invention also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program realizes the steps of the tobacco redrying method when being executed by a processor.
For a related description of a computer-readable storage medium provided in the present invention, reference is made to the embodiment of the tobacco redrying method described above, and details thereof are omitted herein.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A method of redrying tobacco leaves, comprising:
negative feedback adjustment is carried out on the temperature of the drying zone based on the preset ideal drying temperature of the drying zone and the actual drying temperature of the drying zone;
negative feedback adjustment is carried out on the temperature of the cooling zone based on the preset ideal cooling temperature of the cooling zone and the actual cooling temperature of the cooling zone;
determining the current state of tobacco leaves based on the actual moisture content of the tobacco leaves currently output by a moisture regain zone, wherein the current state comprises a qualified state and a warning state;
selecting a corresponding regulation and control mode according to the current state of the tobacco leaves, and regulating the humidity of the conditioning area to enable the state of the tobacco leaves output after the conditioning area to be the qualified state;
wherein the alert state includes a light alert state and a high alert state;
determining the current state of the tobacco based on the actual moisture content of the tobacco currently output by the conditioning area, wherein the determining comprises the following steps:
determining the absolute value of the difference between the actual water content and the water content of an ideal moisture regain area;
when the absolute value of the difference value is smaller than a first preset threshold value, determining that the current state of the tobacco leaves is the qualified state;
when the absolute value of the difference value is larger than the first preset threshold value and smaller than a second preset threshold value, determining that the current state of the tobacco leaves is the light warning state;
when the absolute value of the difference value is larger than the second preset threshold value, determining that the current state of the tobacco leaves is the high-vigilance state;
selecting a corresponding regulation and control mode according to the current state of the tobacco leaves to regulate the humidity of the conditioning area, wherein the method comprises the following steps:
when the current state of the tobacco leaves is the light warning state, the working frequency of a high-pressure water pump of the moisture regaining area is regulated in a proportional-integral-derivative mode so as to regulate the humidity of the moisture regaining area;
and when the current state of the tobacco leaves is the high-warning state, the humidity of the conditioning area is adjusted by adjusting the opening number of the atomizing nozzles of the conditioning area.
2. The tobacco redrying method according to claim 1, wherein the negative feedback adjustment of the temperature of the drying zone based on a preset ideal drying temperature of the drying zone and an actual drying temperature of the drying zone comprises:
adjusting the switching degree of a steam valve of the drying zone through a proportional-integral-derivative controller based on the preset ideal drying temperature and the actual drying temperature;
and carrying out negative feedback adjustment on the temperature of the cooling zone based on the preset ideal cooling temperature of the cooling zone and the actual cooling temperature of the cooling zone, wherein the negative feedback adjustment comprises the following steps:
and adjusting the switching degree of a steam valve of the cooling zone through the proportional-integral-derivative controller based on the preset ideal cooling temperature and the actual cooling temperature.
3. The tobacco redrying method according to claim 1, wherein when it is determined that the current state of tobacco in the moistureproof zone is a disqualified state based on the actual moisture content of tobacco in the moistureproof zone, further comprising:
and outputting the tobacco leaves with the current state being the unqualified state to a leaf storage cabinet so that the leaf storage cabinet can carry out corresponding treatment on the tobacco leaves with the current state being the unqualified state.
4. The tobacco redrying method according to claim 1, wherein when the current state of tobacco in said deliquescent area is said acceptable state, further comprising:
and controlling the packing device to pack and encase the tobacco leaves with the current state being the qualified state.
5. The tobacco redrying method according to any one of claims 1 to 4, further comprising, before determining the current state of tobacco based on the actual moisture content of the tobacco currently output by the conditioning zone:
and detecting an average value of the moisture content of the tobacco leaves output by the conditioning area in a preset time period, and taking the average value as the actual moisture content of the tobacco leaves currently output by the conditioning area.
6. A tobacco redrying system for implementing a tobacco redrying method according to any one of claims 1 to 5, said tobacco redrying system comprising:
the drying zone adjusting unit is used for carrying out negative feedback adjustment on the temperature of the drying zone based on the preset ideal drying temperature of the drying zone and the actual drying temperature of the drying zone;
the cooling zone adjusting unit is used for carrying out negative feedback adjustment on the temperature of the cooling zone based on the preset ideal cooling temperature of the cooling zone and the actual cooling temperature of the cooling zone;
a tobacco leaf state determining unit, configured to determine a current state of tobacco leaf based on an actual moisture content of tobacco leaf currently output by a moisture regain zone, where the current state includes a qualified state and an alert state;
and the conditioning unit of the conditioning area is used for selecting a corresponding regulation and control mode according to the current state of the tobacco leaves to regulate the humidity of the conditioning area, so that the state of the tobacco leaves output after the conditioning area is the qualified state.
7. A tobacco redrying apparatus, comprising:
a memory for storing a computer program;
a processor for carrying out the steps of the tobacco redrying method according to any one of claims 1 to 5 when said computer program is executed.
8. The tobacco redrying device according to claim 7, further comprising a high pressure water pump provided in a moistureproof area, an atomizing nozzle provided in said moistureproof area, and a filter installed at a water inlet of said atomizing nozzle.
9. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the tobacco redrying method according to any one of claims 1 to 5.
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| CN203028084U (en) * | 2012-12-28 | 2013-07-03 | 广东中烟工业有限责任公司 | Tobacco re-drying system |
| CN103211295A (en) * | 2013-04-19 | 2013-07-24 | 湖南中烟工业有限责任公司 | Control method and device of moisture on outlet of tobacco damping machine |
| CN103365211A (en) * | 2013-06-19 | 2013-10-23 | 浙江中烟工业有限责任公司 | Loosening and wetting moisture control device |
| CN106019928A (en) * | 2016-05-16 | 2016-10-12 | 东华大学 | Dual control method for outlet moisture in tobacco re-drying process |
| CN105962408B (en) * | 2016-07-01 | 2018-02-02 | 云南烟叶复烤有限责任公司 | A kind of how tactful composite control method that moisture content in leaves is exported to tobacco redryer |
| CN108294352B (en) * | 2017-01-11 | 2020-12-29 | 红塔烟草(集团)有限责任公司 | Material moisture overrun early warning control system of roller cut-tobacco drier |
| CN110946306B (en) * | 2019-12-12 | 2022-09-23 | 河南中烟工业有限责任公司 | Quality control method and system based on drum-type cut tobacco moisture regain |
| CN112790418B (en) * | 2021-03-18 | 2022-05-24 | 河南中烟工业有限责任公司 | Water adding control method and system for super moisture regain of cut tobacco |
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