CN106773657A - A kind of roller drying unstable state process head material and the optimising and adjustment method in tailing stage - Google Patents
A kind of roller drying unstable state process head material and the optimising and adjustment method in tailing stage Download PDFInfo
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Abstract
A kind of roller drying unstable state process head material and the optimising and adjustment method in tailing stage, by analyzing the roller drying material head stage and the material tail stage exports moisture content of cut tobacco and flow and changes with time feature, it is minimum as target with the unqualified pipe tobacco yield of low-water-content, determine material head and material tail stage barrel steam pressure, hot blast temperature, drum rotation speed, the optimized risk control level of benefit fresh air delay time machined parameters, and corresponding barrel steam pressure, hot blast temperature, drum rotation speed from the unstable state stage to the switching time of stable state process；By the material head stage of above-mentioned acquisition and the optimal machined parameters combination of material tail stage and parameter switching time, for regulating and controlling roller drying unstable state process material head and tailing stage.The invention provides a kind of scientific and effective method, identified roller drying material head and material tail stage regulation and control model compared with Conventional wisdom method, can effectively reduce the pipe tobacco over-dried cut tobacco amount of roller drying processing link, reduce raw tobacco material consumption.
Description
Technical field
The present invention relates to technical field of tobacco processing, more particularly to roller drying unstable state process head material and tailing rank
The optimising and adjustment method of section.
Background technology
As the roller cut tobacco drying of cigarette primary processing key manufacturing procedure in pipe tobacco process, heated by steam
Barrel and hot blast provide drying source for pipe tobacco, its control system mainly includes Steam pressure control, hot blast temperature control system
System, drum speed control.Based on barrel drying, barrel temperature is to regulate and control to steam by adjusting steam film valve to roller cut tobacco drying
Atmospheric pressure is controlled.Control to hot blast temperature is controlled by the heater or cold-hot air door in hot blast loop.Dry
Silk moisture content generally uses steam loop control, i.e., implement two close cycles serials control to barrel steam pressure or hot air heat exchanger,
Control barrel or hot blast temperature reach the requirement of outlet moisture content.Roller dries silk increases pipe tobacco crimpness and elasticity, improves pipe tobacco
Quality and Filling power.But cylinder cut tobacco dryer is in the course of the work, because pipe tobacco amount is less at the beginning and end of production, and cut-tobacco drier
Roller there is larger thermal capacitance, cause cut-tobacco drier import and export cut tobacco " material head ", " material tail "（Substandard product）, " material head ", " material
Tail " phenomenon is the common problem that tobacco business faces at present, " material head ", the generation of " material tail " cause in pipe tobacco chemical composition also with
Moisture loss and significant changes occur, cause aroma of tobacco shreds matter, perfume quantity reduction, miscellaneous gas to increase, the reduction of fine and smooth degree, stimulate
Property enhancing, dry sensation increase and clean level reduction etc..In addition, " dry head ", " dry tail " by postorder processing broken rate compared with
Height, greatly reduces the uniformity consistency of product processing quality, aesthetic quality and Product processing, increased disappearing for tobacco raw material
Consumption.
In recent years, the control requirement with tobacco enterprise to production process is improved constantly, and cut tobacco is reduced as much as possible and is dried
" material head ", " material tail " the pipe tobacco amount produced in process, is one of important goal of cigarette enterprise Resource regeneration.At present, it is
" material head ", " material tail " pipe tobacco amount are reduced, a kind of scheme added by drying remaining time and experience in Time segments division and cylinder
Water is controlled（《Chinese tobacco association》, 2007 (9)：347-352）, improve the stability of outlet moisture content of cut tobaccos；It is another
The scheme of kind is by optimizing baking silk head material operating temperature, link being corrected automatically by temperature（《Tobacco science and technology》, 2013 (9)：27-
29）, to reduce over-dried cut tobacco amount.But above-mentioned solution is main or based on experience, operation difficulty is big, it is difficult to hold.
Meanwhile, during roller drying, " material head ", " material tail " are by barrel temperature, hot blast temperature, drum rotation speed and mend the fresh air time
Etc. the influence of composite factor, if only regulate and control single influence factor to be difficult efficiently to remove control " material head ", " material tail ".Therefore, seek
A kind of efficient control roller drying unstable state process head material and the optimising and adjustment method in tailing stage, are enhancing cigarette products
Quality stability, the important channel for reducing the consumption of pipe tobacco process.
The content of the invention
The purpose of the present invention is based on above-mentioned prior art situation and provides a kind of control roller drying unstable state processing
Procedure heading material and the optimising and adjustment method in tailing stage.The method is non-steady by obtaining material head stage and material tail stage two successively
The optimized risk control level of each critical processing parameters, unstable state stage to stable state process in state process（Or stable state processing
Process is to the unstable state stage）The switching time of critical processing parameters, so that it is determined that being effectively reduced the unqualified pipe tobacco of low-water-content
The roller drying unstable state process Optimal regulation and control pattern of amount.
The purpose of the present invention is achieved through the following technical solutions：
A kind of roller drying unstable state process head material and the optimising and adjustment method in tailing stage, by analyzing roller drying material
Head stage and material tail stage outlet moisture content of cut tobacco and flow change with time feature, are produced with the unqualified pipe tobacco of low-water-content
Amount is at least target, determines material head stage barrel steam pressure, hot blast temperature, drum rotation speed, benefit fresh air delay time processing ginseng
Several optimized risk control levels, and corresponding barrel steam pressure, hot blast temperature, drum rotation speed add from unstable state stage to stable state
The switching time of work process；While determination material tail stage barrel steam pressure, hot blast temperature, drum rotation speed machined parameters is optimal
Controlled level, and above-mentioned parameter is from stable state process to the switching time in unstable state stage；By the material head rank of above-mentioned acquisition
Section and the optimal machined parameters combination of material tail stage and parameter switching time, for regulating and controlling roller drying unstable state process head material
With the tailing stage.
Specifically include following steps：
（1）, barrel steam pressure setting value Pw according to pipe tobacco in the stable state process segment, in the material head and material of drum drying equipment
Some different barrel vapor pressure conditions are set gradually in tail control program in the range of 0.6~1.2Pw；Above-mentioned each barrel
Under vapor pressure conditions, drum drying equipment carries out punishment in advance and dries silk respectively, is filled using Moisture Meter and online weighing in cut tobacco drying
Put and record respectively and determine material head and the outlet of material tail stage moisture content of cut tobacco and flow versus time curve；
（2）, hot blast temperature setting value Tg according to pipe tobacco in the stable state process segment, material head and material tail control in drum drying equipment
Some different hot blast temperature conditions are set gradually in processing procedure sequence in the range of 0.6~1.0Tg；Above-mentioned each hot blast temperature condition
Under, drum drying equipment carries out punishment in advance and dries silk respectively, recorded respectively using Moisture Meter and online weighing device in cut tobacco drying and
Determine material head and the outlet of material tail stage moisture content of cut tobacco and flow versus time curve；
（3）, drum rotation speed setting value N according to pipe tobacco in the stable state process segment, material head and material tail control in drum drying equipment
Some different drum rotation speed conditions are set gradually in processing procedure sequence in the range of 1~1.5N；Under the conditions of above-mentioned each drum rotation speed,
Drum drying equipment carries out punishment in advance and dries silk respectively, is recorded respectively and is determined using Moisture Meter and online weighing device in cut tobacco drying
Material head and the outlet of material tail stage moisture content of cut tobacco and flow versus time curve；
(4), the benefit fresh air delay time setting value t according to pipe tobacco in the stable state process segment, in the material head control of drum drying equipment
Some different benefit fresh air delay time conditions are set gradually in processing procedure sequence in the range of 1~3t；Above-mentioned each benefit fresh air time delay
Under time conditions, drum drying equipment carries out punishment in advance and dries silk respectively, using Moisture Meter and online weighing device point in cut tobacco drying
The outlet of material head stage moisture content of cut tobacco and flow versus time curve and Ji Lu not be determined；
(5), exist（1）~（4）Under acquired material head and material tail stage each processing conditions in outlet moisture content of cut tobacco change curve,
Determine that moisture content of cut tobacco reaches time value t1 and t2 corresponding to 9% and 6% respectively；In the corresponding outlet cut tobacco of each processing conditions
In flow changing curve, the unqualified tobacco quality W1, aqueous of discharge head and material tail stage moisture content less than 9.0% is calculated respectively
Unqualified tobacco quality W2 of the rate less than 6.0%；
（6）, in the material head stage, according to different barrel steam pressures, hot blast temperature, drum rotation speed and mend under fresh air delay time
Unqualified tobacco quality, when W2 values are more than 0, with the minimum criterion of W2 values, determines material head stage aforementioned four machined parameters
Optimal value；When W2 values are 0, then with the minimum criterions of W1, the optimal value of material head stage aforementioned four machined parameters is determined；
（7）, material the tail stage, according to the unqualified tobacco quality under different barrel steam pressures, hot blast temperature and drum rotation speed,
When W2 values are more than 0, with the minimum criterion of W2 values, it is determined that the optimal value of material tail stage above three machined parameters；When W2 values are 0
When, then with the minimum criterions of W1, it is determined that the optimal value of material tail stage above three machined parameters；
（8）, in the material head stage, by barrel steam pressure, hot blast temperature, drum rotation speed and benefit in drum drying equipment control program
Fresh air delay time machined parameters are respectively set to（6）In identified optimal value, drum drying equipment material head control journey
Respectively by barrel steam pressure, hot blast temperature, drum rotation speed machined parameters cutting from the material head stage to the stable state process segment in sequence
Change time delay is set to varying level in the range of 30-90s, successively in the handoff delay time conditions of each machined parameters
Under, carry out punishment in advance and dry silk, and record and determine the outlet of material head stage moisture content of cut tobacco and flow versus time curve；
（9）, foundation（6）Described in optimization principles, respectively determine the material head stage barrel steam pressure, hot blast temperature, roller turn
The handoff delay time optimal value of speed, the optimal processing parameters combination being derived from material head stage control program and each processing ginseng
Number corresponding optimal switching time delay；
（10）, material the tail stage, similarly perform successively（8）~（9）Step, respectively determine material the tail stage barrel steam pressure,
The handoff delay time optimal value of hot blast temperature, drum rotation speed, is derived from expecting the optimal process ginseng in tail stage control program
Array is closed and each machined parameters corresponding optimal switching time delay.
Above-mentioned steps（1）~（4）Described in Moisture Meter, be the in-line infrared water-measuring meter in known technology；It is described online
Weighing device, is belted electronic balance or uclear scale in known technology.
Above-mentioned steps（5）Described in the W1 and W2 in material head stage outlet cut tobacco flow changing curve integration is obtained,
Circular is as follows：
In above formula, t is the time, and Wt is the t correspondence outlet cut tobacco real-time flow data of online weighing device detection.
Above-mentioned steps（5）Described in material the tail stage W1 and W2 circulars it is as follows：
The advantage of the invention is that being the setting of pipe tobacco roller drying process material head and material tail unstable state process segment control program
There is provided a kind of scientific and effective optimization method, using roller drying material head determined by the method and material tail stage regulation and control mould
Formula, compared with traditional empirical method, can effectively reduce the pipe tobacco over-dried cut tobacco amount of roller drying processing link, reduce tobacco leaf former
Material consumption.
Brief description of the drawings
Fig. 1 is regulation and control method and step block diagram of the invention.
Fig. 2 material head stage drum outlet cut tobacco butt flows change over time curve map.
Fig. 3 material tail stage drum outlet cut tobacco butt flows change over time curve map.
Tri- kinds of combination material head stage unqualified pipe tobacco amount schematic diagrames of Fig. 4.
Tri- kinds of combination material head stage unqualified time diagrams of Fig. 5.
Under three kinds of mode combination conditions of Fig. 6 material head stages, drum outlet material water ratio and unit interval inventory are at any time
Between change curve.
Two kinds of combination material tail stage unqualified pipe tobacco yield schematic diagrames of Fig. 7.
Two kinds of combination material tail phases-time schematic diagrames of Fig. 8.
Under Fig. 9 two kinds of mode combination conditions of material tail stage, drum outlet material water ratio and unit interval inventory are at any time
Between change curve.
Specific embodiment
The present invention is with reference to embodiments（Accompanying drawing）It is described further.
Embodiment
By taking first factory as an example, control roller drying unstable state process head material and the regulation and control method in tailing stage are：
1st, when first factory normally produces, it is ensured that roller barrel pressure（Temperature）Be followed successively by 1.0bar, 1.2bar, 1.4bar,
1.6bar, into normally being fed after holding state, material proceeds by the time of stabilization feeding by belt conveyer scale to cut-tobacco drier
0s is designated as, a tobacco sample is accessed every 10s in tobacco-dryer exit, access the time for 10s.Sample is according to sampling sequencing
Weigh, at the same determination sample moisture, and converse the situation of change of material butt flow, you can obtain material head or expect the tail stage
The situation of change of outlet moisture content of cut tobacco, butt flow and unqualified pipe tobacco amount.Draw material head, material tail phases-time, outlet not
Qualified pipe tobacco amount is with barrel pressure history.
2nd, when first factory normally produces, it is ensured that hot blast drum temperature is followed successively by 85 DEG C, 90 DEG C, 95 DEG C, 100 DEG C, cut-tobacco drier
Normally fed after into holding state, material is designated as 0s by the time that belt conveyer scale proceeds by stabilization feeding, dried silk
Machine outlet accesses a tobacco sample every 10s, accesses the time for 10s.Sample is weighed according to sampling sequencing, while determining
Sample moisture, and converse the situation of change of material butt flow, you can obtain material head or the outlet cut tobacco in material tail stage is aqueous
The situation of change of rate, butt flow and unqualified pipe tobacco amount.Draw material head, material tail phases-time, export unqualified pipe tobacco amount with
Hot blast temperature change curve.
3rd, when first factory normally produces, it is ensured that drum rotation speed is followed successively by 6.5rpm, 8.5rpm, 10.5rpm, 12.5rpm, baking
Into normally being fed after holding state, material is designated as 0s to silk machine by the time that belt conveyer scale proceeds by stabilization feeding,
Tobacco-dryer exit accesses a tobacco sample every 10s, accesses the time for 10s.Sample is weighed according to sampling sequencing, while
Determination sample moisture, and converse the situation of change of material butt flow, you can obtain the outlet cut tobacco in material head or material tail stage
The situation of change of moisture content, butt flow and unqualified pipe tobacco amount.Draw material head, material tail phases-time, export unqualified pipe tobacco
Amount is with drum rotation speed change curve.
4th, when first factory normally produces, it is ensured that mend fresh air delay time and be followed successively by 30s, 50s, 70s, 90s, cut-tobacco drier entrance
Normally fed after holding state, material is designated as 0s by the time that belt conveyer scale proceeds by stabilization feeding, goes out in cut-tobacco drier
Mouth accesses a tobacco sample every 10s, accesses the time for 10s.Sample is weighed according to sampling sequencing, while determination sample
Moisture, and converse the situation of change of material butt flow, you can obtain material head or the outlet moisture content of cut tobacco in material tail stage, do
The situation of change of Dryweather flow and unqualified pipe tobacco amount.Draw material head phases-time, export unqualified pipe tobacco amount with drum rotation speed change
Change curve.
5th, considered by step 1,2,3,4, technological parameter optimal set is determined in material head stage unstable state process
It is combined into barrel temperature（Pressure）1.0bar, 90 DEG C of hot blast temperature, drum rotation speed 10.5rpm, benefit fresh air delay time 30s, expect tail
Determine that technological parameter optimum combination is barrel temperature in stage unstable state process（Pressure）1.0bar, 85 DEG C of hot blast temperature,
Drum rotation speed 10.5rpm.
6th, the drying parameter such as barrel temperature, the hot blast temperature in roller drying process material head stage is set, generally less than steady
The state production phase, to reduce dry cut tobacco amount.Therefore, in the material head stage, if proper extension barrel temperature, hot blast temperature switch
Process time to before stable state processing conditions, i.e., equivalent to the dry tenacity for further reducing the material head stage, contribute into one
Step reduces the dry head amount of pipe tobacco.Therefore, to the barrel temperature handoff delay time, design optimization investigates 30s, and (the raw material head stage regulates and controls
Value), tri- levels of 50s, 70s；To the hot blast temperature handoff delay time, design optimization investigate 30s (raw material head stage control value),
Two levels of 50s；To the drum rotation speed handoff delay time, two levels of 30s, 50s are investigated in design.Regulation and control scheme such as table 1
Under three kinds of mode combination conditions of material head stage, draw drum outlet material water ratio change over time curve see Fig. 2, three kinds
Combination material head stage unqualified pipe tobacco amount is shown in that Fig. 3, three kinds of unqualified times in combination material head stage are shown in Fig. 4.
It is appropriate to shorten the delay time that barrel temperature is cut to material shape of tail state by stable state processing conditions in the material tail stage, have
Help reduce the dry tenacity in material tail stage, so as to further reduce the dry tail amount of pipe tobacco.When therefore, to barrel temperature handoff delay
Between, design optimization investigates two levels of 40s, 30s.Regulation and control scheme such as table 2
Material tail stage two ways combination condition under, draw drum outlet material water ratio change over time curve see Fig. 5, two kinds
Combination material tail stage unqualified pipe tobacco yield is shown in that Fig. 6, two kinds of combination material tail phases-times are shown in Fig. 7.
7th, by comprehensive analysis, first factory material head stage unstable state process optimum combination regulation and control scheme is as follows：Barrel temperature
Degree（Pressure）1.0bar, 90 DEG C of hot blast temperature, drum rotation speed 10.5rpm, benefit fresh air delay time 30s, unstable state to stable state mistake
The optimal switching time of journey is barrel temperature（Pressure）70s, hot blast temperature and drum rotation speed 50s.The unstable state processing of material tail stage
Process optimum combinatorial regulation scheme is as follows：Barrel temperature（Pressure）1.0bar, 85 DEG C of hot blast temperature, drum rotation speed 10.5rpm, surely
State to transient the optimal switching time be 30s.
Claims (5)
1. a kind of roller drying unstable state process head expects the optimising and adjustment method with the tailing stage, it is characterised in that：The party
Method by analyzing the roller drying material head stage and the material tail stage exports moisture content of cut tobacco and flow and changes with time feature, with
The unqualified pipe tobacco yield of low-water-content is at least target, determines that material head stage barrel steam pressure, hot blast temperature, roller turn
Speed, the optimized risk control level for mending fresh air delay time machined parameters, and corresponding barrel steam pressure, hot blast temperature, roller
Rotating speed is from the unstable state stage to the switching time of stable state process；Material tail stage barrel steam pressure, hot blast temperature are determined simultaneously
Degree, the optimized risk control level of drum rotation speed machined parameters, and above-mentioned parameter cutting from stable state process to the unstable state stage
Change the time；By the material head stage of above-mentioned acquisition and the optimal machined parameters combination of material tail stage and parameter switching time, for regulating and controlling
Roller drying unstable state process head material and tailing stage.
2. optimising and adjustment method according to claim 1, it is characterised in that：Comprise the following steps：
（1）, barrel steam pressure setting value Pw according to pipe tobacco in the stable state process segment, in the material head and material of drum drying equipment
Some different barrel vapor pressure conditions are set gradually in tail control program in the range of 0.6~1.2Pw；Above-mentioned each barrel
Under vapor pressure conditions, drum drying equipment carries out punishment in advance and dries silk respectively, is filled using Moisture Meter and online weighing in cut tobacco drying
Put and record respectively and determine material head and the outlet of material tail stage moisture content of cut tobacco and flow versus time curve；
（2）, hot blast temperature setting value Tg according to pipe tobacco in the stable state process segment, material head and material tail control in drum drying equipment
Some different hot blast temperature conditions are set gradually in processing procedure sequence in the range of 0.6~1.0Tg；Above-mentioned each hot blast temperature condition
Under, drum drying equipment carries out punishment in advance and dries silk respectively, recorded respectively using Moisture Meter and online weighing device in cut tobacco drying and
Determine material head and the outlet of material tail stage moisture content of cut tobacco and flow versus time curve；
（3）, drum rotation speed setting value N according to pipe tobacco in the stable state process segment, material head and material tail control in drum drying equipment
Some different drum rotation speed conditions are set gradually in processing procedure sequence in the range of 1~1.5N；Under the conditions of above-mentioned each drum rotation speed,
Drum drying equipment carries out punishment in advance and dries silk respectively, is recorded respectively and is determined using Moisture Meter and online weighing device in cut tobacco drying
Material head and the outlet of material tail stage moisture content of cut tobacco and flow versus time curve；
(4), the benefit fresh air delay time setting value t according to pipe tobacco in the stable state process segment, in the material head control of drum drying equipment
Some different benefit fresh air delay time conditions are set gradually in processing procedure sequence in the range of 1~3t；Above-mentioned each benefit fresh air time delay
Under time conditions, drum drying equipment carries out punishment in advance and dries silk respectively, using Moisture Meter and online weighing device point in cut tobacco drying
The outlet of material head stage moisture content of cut tobacco and flow versus time curve and Ji Lu not be determined；
(5), exist（1）~（4）Under acquired material head and material tail stage each processing conditions in outlet moisture content of cut tobacco change curve,
Determine that moisture content of cut tobacco reaches time value t1 and t2 corresponding to 9% and 6% respectively；In the corresponding outlet cut tobacco of each processing conditions
In flow changing curve, the unqualified tobacco quality W1, aqueous of discharge head and material tail stage moisture content less than 9.0% is calculated respectively
Unqualified tobacco quality W2 of the rate less than 6.0%；
（6）, in the material head stage, according to different barrel steam pressures, hot blast temperature, drum rotation speed and mend under fresh air delay time
Unqualified tobacco quality, when W2 values are more than 0, with the minimum criterion of W2 values, determines material head stage aforementioned four machined parameters
Optimal value；When W2 values are 0, then with the minimum criterions of W1, the optimal value of material head stage aforementioned four machined parameters is determined；
（7）, material the tail stage, according to the unqualified tobacco quality under different barrel steam pressures, hot blast temperature and drum rotation speed,
When W2 values are more than 0, with the minimum criterion of W2 values, it is determined that the optimal value of material tail stage above three machined parameters；When W2 values are 0
When, then with the minimum criterions of W1, it is determined that the optimal value of material tail stage above three machined parameters；
（8）, in the material head stage, by barrel steam pressure, hot blast temperature, drum rotation speed and benefit in drum drying equipment control program
Fresh air delay time machined parameters are respectively set to（6）In identified optimal value, drum drying equipment material head control journey
Respectively by barrel steam pressure, hot blast temperature, drum rotation speed machined parameters cutting from the material head stage to the stable state process segment in sequence
Change time delay is set to varying level in the range of 30-90s, successively in the handoff delay time conditions of each machined parameters
Under, carry out punishment in advance and dry silk, and record and determine the outlet of material head stage moisture content of cut tobacco and flow versus time curve；
（9）, foundation（6）Described in optimization principles, respectively determine the material head stage barrel steam pressure, hot blast temperature, roller turn
The handoff delay time optimal value of speed, the optimal processing parameters combination being derived from material head stage control program and each processing ginseng
Number corresponding optimal switching time delay；
（10）, material the tail stage, similarly perform successively（8）~（9）Step, respectively determine material the tail stage barrel steam pressure,
The handoff delay time optimal value of hot blast temperature, drum rotation speed, is derived from expecting the optimal process ginseng in tail stage control program
Array is closed and each machined parameters corresponding optimal switching time delay.
3. optimising and adjustment method according to claim 2, it is characterised in that：Described Moisture Meter is infrared moisture meter.
4. optimising and adjustment method according to claim 2, it is characterised in that：The online weighing device is electronic belt
Scale or uclear scale.
5. optimising and adjustment method according to claim 2, it is characterised in that：Step（5）Described in the material head stage W1 and
W2 is obtained to outlet cut tobacco flow changing curve integration, and circular is as follows：
In above formula, t is the time, and Wt is the t correspondence outlet cut tobacco real-time flow data of online weighing device detection；
Step（5）Described in material the tail stage W1 and W2 circulars it is as follows：
。
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| CN111374339A (en) * | 2020-03-20 | 2020-07-07 | 红云红河烟草(集团)有限责任公司 | Control method for reducing dry filament quantity and energy consumption in filament making and drying section |
| CN111721664A (en) * | 2020-04-24 | 2020-09-29 | 上海远跃制药机械有限公司 | Detection method, system and device based on vacuum caterpillar dryer |
| CN111831028A (en) * | 2020-07-28 | 2020-10-27 | 福建省龙岩金叶复烤有限责任公司 | Temperature control method and device for material head and material tail of moisture regain section of redrying machine and medium |
| CN111831029A (en) * | 2020-07-28 | 2020-10-27 | 福建省龙岩金叶复烤有限责任公司 | Tobacco redrying temperature control method and device and medium |
| CN112263012A (en) * | 2020-10-15 | 2021-01-26 | 中国烟草总公司郑州烟草研究院 | Moisture content control method of redrying machine based on formula parameter library |
| CN113243547A (en) * | 2021-05-11 | 2021-08-13 | 河北白沙烟草有限责任公司 | Automatic speed regulating method and system for tobacco shred perfuming roller |
| CN115989885A (en) * | 2023-02-27 | 2023-04-21 | 四川中烟工业有限责任公司 | Cut tobacco dryer and method for shortening moisture unsteady state time of cut tobacco at outlet of cut tobacco dryer |
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