CN203028084U - Tobacco re-drying system - Google Patents
Tobacco re-drying system Download PDFInfo
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- CN203028084U CN203028084U CN 201220737298 CN201220737298U CN203028084U CN 203028084 U CN203028084 U CN 203028084U CN 201220737298 CN201220737298 CN 201220737298 CN 201220737298 U CN201220737298 U CN 201220737298U CN 203028084 U CN203028084 U CN 203028084U
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Abstract
The utility model particularly discloses a tobacco re-drying system which comprises a tobacco leaf moistening machine and a tobacco flake drying machine. The tobacco leaf moistening machine comprises a heat exchanger and a tobacco leaf moistening cylinder, the tobacco flake drying machine comprises drying areas, a cold area and a moisture regaining room in sequential connection, the tobacco flake drying machine further comprises a first predictive PI (proportional integral) controller stored with a tobacco leaf moistening cylinder tobacco leaf temperature set value and a second predictive PI controller stored with a hot air temperature set value, an outlet of the tobacco leaf moistening cylinder is provided with a first tobacco leaf temperature measuring device connected with an input end of the first predictive PI controller, a hot air temperature measuring device connected with an input end of the second predictive PI controller is arranged in the heat exchanger, and the second predictive PI controller is connected with the heat exchanger. The predictive PI controllers have the advantages of capabilities of predicating output signals of a long time-delay process and suppressing measurement noise, and are suitable for stable control of long time-delay objects. Automatic control of moisture and temperature of an overall tobacco re-drying line can be achieved, field process control capability is improved, and tobacco re-drying processing quality is improved integrally.
Description
Technical field
The utility model relates to the beating and double roasting technical field, is specifically related to a kind of tobacco redrying system.
Background technology
The tobacco redrying process is interference more than, close coupling, large time delay, non-linear, uncertain big thermal capacitance process.In process of production, exist heat transfer medium (hot gas) with uniform temperature, humidity, pressure, flow velocity all the time and in the relative motion process, heat exchange action takes place with tobacco leaf, thereby reach the purposes such as drying, cooling, moisture regain of tobacco leaf.Tobacco redrying comprises leaves moisting and two emphasis process sections of roasting sheet, and leaves moisting realizes by tobacco leaf moisting machine that generally roasting sheet realizes by roasting sheet machine that generally roasting sheet machine generally comprises dry section, cold-zone, ordering room.Arbitrary zone temperatures of various process, the variation of humidity all can have influence on the variation of each section parameter thereafter and the variation of outlet moisture content in leaves content, and this becomes quite complicated with regard to the mechanism model that makes the system of foundation, is in particular in the following aspects:
1) disturbing factor is many: the moisture of entrance tobacco leaf, temperature, the place of production, kind, grade have very important influence to moisture content of outlet; Pressure, temperature and the degree of saturation of heating steam and moisture regain steam directly influences moisture and the temperature of outlet tobacco leaf; The temperature of surrounding air, humidity also have bigger remote-effects to moisture content in leaves and the temperature of cooling stage.
2) there is certain problem in measuring instrument, and particularly the infrared moisture meter precision is subjected to external influence bigger, and a reference value is easily drifted about, and cold-room moisture instrument measured value is subjected to the pollution of electrical noise, and the measured value fluctuation is frequent, has seriously influenced the performance of closed-loop control.
3) the production process characteristic is changeable: be subjected to anterior influence of beating the leaf process, the speed of tobacco leaf feed rate, tobacco leaf feeding machine needs to adjust to satisfy produce continuous sometimes, changes with regard to the characterisitic parameter that has caused process like this; Simultaneously, tobacco redrying is worked under environment such as high temperature, high humidity and dust, and equipment also can take place unusually, and in this case, operating personnel need change technological operation at any time, make process characteristic have diversity, are difficult to realize stable PID closed-loop control.
4) control of moisture is a large time delay process: often after moisture content of outlet changed, it was untimely it being controlled again, and the direct result that causes is that moisture fluctuates up and down in setting value, can not stablize.
The existence of above reason has increased the difficulty of redrying moisture content of outlet control, and pid control algorithm itself has a lot of limitation, be non-minimum phase system with reverse characteristic, have serious frequent procedures system, multivariable strongly coupled system, the control system that has constraint and a Large-lag System of disturbing as it, use the closed-loop control that simple pid control algorithm carries out even can not guarantee the stable of system, let alone the precision of control.
In classical control system, it more pays attention to the monomer running of equipment and the chain operation between the equipment, still adopt traditional pid algorithm at specific control loop, and these control loops have independence of one's own, ignored " force action " between multifactor, for example: the moisture content of roasting sheet outlet tobacco leaf largely is subjected to influencing jointly of each control loop.And if by control manually, because experience difference, the stabilization time of operative employee's control line of varying level is different in size, veteran operative employee often abandons the automatic PID of computer and regulates and control with the experience of oneself fully.And in whole roasting sheet machine control system, need the loop of control that (even more) are arranged ten more than, and relying on the artificial experience regulation and control, its difficulty and the degree of accuracy can't guarantee.Therefore to produce high-quality finished product, must do overall consideration to process of manufacture, also must set up production models to the influence of finished product and analyze influencing each other between a plurality of loops, external disturbance to the influence of control and production status constraint etc. except analyzing single loop.Have only by creating out production models accurately, various factors and correlation thereof are all included in whole system take all factors into consideration, could realize outstanding control effect.
The utility model content
The technical problem that the utility model solves is to overcome the deficiencies in the prior art, provides a kind of the tobacco redrying process is carried out moisture and temperature auto control, can promote the tobacco redrying system of control accuracy.
For solving the problems of the technologies described above, the technical solution of the utility model is as follows:
A kind of tobacco redrying system, comprise tobacco leaf moisting machine and roasting sheet machine, tobacco leaf moisting machine comprises heat exchanger and leaves moisting tube, roasting sheet machine comprises the dry section that connects successively, cold-zone and ordering room, also comprise first predictive PI controller and second predictive PI controller, store leaves moisting tube tobacco leaf desired temperature in first predictive PI controller, store the hot blast temperature setting value in second predictive PI controller, the outlet of leaves moisting tube is provided with the first tobacco leaf temperature measuring equipment, be provided with the hot blast temperature measurement mechanism in the heat exchanger, the first tobacco leaf temperature measuring equipment is connected with the input of first predictive PI controller, the output of first predictive PI controller is connected with the input of hot blast temperature measurement mechanism with second predictive PI controller, and the output of second predictive PI controller is connected with heat exchanger.
Preferably, the entrance and exit of tobacco leaf moisting machine is respectively equipped with inlet steam valve and the outlet steam valve that all is connected with the first predictive PI controller output, tobacco leaf moisting machine exports out also to be provided with first predictive PI controller imports out the moisture content in leaves checkout gear that end is connected, also store the aperture limiting value of inlet steam valve and outlet steam valve in first predictive PI controller, first predictive PI controller is according to the aperture of moisture content in leaves control inlet steam valve and the outlet steam valve in aperture limiting value and tobacco leaf moisting machine exit.
Preferably, described tobacco leaf moisting machine porch also is provided with the feed rate signal supervisory instrument that is connected with the first predictive PI controller input, and first predictive PI controller is according to the humidification quantity of steam in feed rate signal and the moisture content of outlet adjusting tobacco leaf moisting machine.
Preferably, also comprise the 3rd predictive PI controller that is connected with the dry section entrance of roasting sheet machine, store the dry section desired temperature in the 3rd predictive PI controller, be provided with the dry section temperature measuring equipment that is connected with the 3rd predictive PI controller input in the dry section, the 3rd predictive PI controller is controlled the temperature of dry section by steam flow in the control dry section.
Preferably, also comprise the 4th predictive PI controller that output is connected with the 3rd predictive PI controller input, store cold-zone moisture setting value in the 4th predictive PI controller, be provided with the cold-zone device for measuring moisture that is connected with the 4th predictive PI controller input in the cold-zone, the 4th predictive PI controller serves as that the control target is regulated the dry section desired temperature with cold-zone moisture.
Preferably, described dry section comprises connect successively a plurality of, the 3rd predictive PI controller is the multiple-input, multiple-output type controller, the input of multiple-input, multiple-output type controller is connected with the output of the 4th predictive PI controller, its output is connected with a plurality of dry sections respectively, controls the temperature of a plurality of dry sections respectively.
Preferably, also comprise the 5th predictive PI controller that is connected with the ordering room entrance of roasting sheet machine, store the ordering room desired temperature in the 5th predictive PI controller, be provided with the ordering room temperature measuring equipment that is connected with the 5th predictive PI controller input in the ordering room, the 5th predictive PI controller is by regulating each temperature of distinguishing of heating steam amount control ordering room of ordering room.
Preferably, also comprise the 6th predictive PI controller that output is connected with the 5th predictive PI controller input, store roasting sheet machine outlet tobacco leaf desired temperature in the 6th predictive PI controller, the ordering room outlet is provided with the roasting sheet machine outlet tobacco leaf temperature measuring equipment that is connected with the 6th predictive PI controller input, and the 6th predictive PI controller is that target is regulated the ordering room desired temperature automatically with roasting sheet machine outlet tobacco leaf temperature.
Preferably, store roasting sheet machine moisture content of outlet setting value in the 5th predictive PI controller, the ordering room outlet is provided with the roasting sheet machine moisture content of outlet measurement mechanism that is connected with the 5th predictive PI controller input, and the 5th predictive PI controller is regulated the amount of water of ordering room according to roasting sheet machine moisture content of outlet.
Preferably, described ordering room comprises a plurality of moisture regain district that connects successively, and the 5th predictive PI controller is the multiple-input, multiple-output type controller, and it is connected simultaneously with many moisture regain district respectively.
Compared with prior art, the beneficial effect of technical solutions of the utility model is:
(1) predictive PI controller in the utility model adopts the predictive PI control algolithm that the tobacco redrying process is controlled, compare with common pid algorithm, output signal and the advantage that suppresses to measure noise that it has prediction large time delay process are suitable for the steady control of large time delay object.
(2) the utility model adopts predictive PI controller to realize moisture and the temperature auto control of the whole line of tobacco redrying, comprise that moisture, temperature to a profit, two profits and three emphasis process sections of roasting sheet jointly control, improve on-the-spot technology controlling and process ability, the whole tobacco redrying crudy that promotes.
Description of drawings
Fig. 1 is to the temperature controlled structural representation of leaves moisting in the tobacco redrying of the present utility model system;
Fig. 2 is to the temperature controlled frame diagram of dry section in the tobacco redrying of the present utility model system;
Fig. 3 is to the frame diagram of cold-zone moisture control in the tobacco redrying of the present utility model system;
Fig. 4 is to the temperature controlled frame diagram in cold-zone in the tobacco redrying of the present utility model system;
Fig. 5 is to ordering room moisture temperature control framework figure in the tobacco redrying of the present utility model system.
The specific embodiment
Below in conjunction with drawings and Examples the technical solution of the utility model is described further.
Shown in Fig. 1-6, be Organization Chart of the present utility model.
A kind of tobacco redrying system, comprise tobacco leaf moisting machine and roasting sheet machine, tobacco leaf moisting machine comprises heat exchanger 3 and leaves moisting tube, roasting sheet machine comprises the dry section that connects successively, cold-zone and ordering room, as shown in Figure 1, also comprise first predictive PI controller 1 and second predictive PI controller 2, store leaves moisting tube tobacco leaf desired temperature in first predictive PI controller 1, store the hot blast temperature setting value in second predictive PI controller 2, the outlet of leaves moisting tube is provided with the first tobacco leaf temperature measuring equipment, be provided with the hot blast temperature measurement mechanism in the heat exchanger 3, the first tobacco leaf temperature measuring equipment is connected with the input of first predictive PI controller 1, the output of first predictive PI controller 1 is connected with the input of hot blast temperature measurement mechanism with second predictive PI controller 2, and the output of second predictive PI controller 2 is connected with heat exchanger 3.The setting of first predictive PI controller 1 and second predictive PI controller 2 is for the tobacco leaf moisting machine outlet temperature is controlled, its with hot blast temperature as regulating measure, utilize predictive PI control algolithm realization closed loop to control automatically, realize indirect control to the leaves moisting temperature with this, the fluctuation range of leaves moisting temperature can be controlled in ± 1.0 ℃ by the utility model, wherein the air circulation in the tobacco leaf moisting machine then can rule of thumb be worth automatic setting.
In the prior art, owing to generally all arranged the humidification steam jet at the tobacco leaf moisting machine entrance and exit, and these two nozzles are different to the regulating action of moisture content of outlet: the regulating action of outlet nozzle is apparent in view, reaction is very fast, is convenient to control; But from technological angle, the wetting action time of entrance humidification is longer, more is conducive to improve the rate that runs through of tobacco leaf.Therefore, in the utility model, to be connected with first predictive PI controller, 1 output with the outlet steam valve with the supporting inlet steam valve of humidification steam jet, tobacco leaf moisting machine exports out and also is provided with the moisture content in leaves checkout gear that is connected with first predictive PI controller, 1 input, also store the aperture limiting value of inlet steam valve and outlet steam valve in first predictive PI controller 1, first predictive PI controller 1 is according to the aperture of moisture content in leaves control inlet steam valve and the outlet steam valve in aperture limiting value and tobacco leaf moisting machine exit.First predictive PI controller 1 is preferentially adjusted the aperture of inlet steam valve according to the aperture limiting value, when the inlet steam valve opening reaches the aperture limiting value of setting, the tobacco leaf moisting machine moisture content of outlet still can not satisfy technological requirement, at this moment, first predictive PI controller will export steam valve and participate in to the moisture control procedure.
The fluctuation of tobacco leaf moisting machine feed rate also is a very important disturbance factor to the influence of tobacco leaf moisting machine moisture content of outlet.Therefore, preferably, be provided with the feed rate signal supervisory instrument that is connected with first predictive PI controller, 1 input in the tobacco leaf moisting machine porch, first predictive PI controller 1 is according to the humidification quantity of steam in feed rate signal and the moisture content of outlet adjusting tobacco leaf moisting machine.
In addition, the rotating speed of tobacco leaf moisting machine directly influences the time of staying of tobacco leaf in tobacco leaf moisting machine, and then causes the variation of tobacco leaf moisting machine moisture content of outlet, and influences the rate that runs through of tobacco leaf.Therefore native system can also be with the tobacco leaf moisting machine rotating speed as one of feed forward variable of moisture control.
As shown in Figure 2, native system also comprises the 3rd predictive PI controller 4 that is connected with the dry section entrance of roasting sheet machine, store the dry section desired temperature in the 3rd predictive PI controller 4, be provided with the dry section temperature measuring equipment that is connected with the 3rd predictive PI controller 4 inputs in the dry section, the 3rd predictive PI controller 4 is controlled the temperature of dry section by steam flow in the control dry section.As a kind of most preferably mode, dry section comprises connect successively a plurality of, the 3rd predictive PI controller 4 is the multiple-input, multiple-output type controller, the output of multiple-input, multiple-output type controller is connected with a plurality of dry sections respectively, control the temperature of a plurality of dry sections respectively, and the 3rd predictive PI controller possesses anti-hysteresis decoupling zero function.Wherein, generally comprise heat exchanger in the dried dry section and import vapours, as shown in Figure 2.
As shown in Figure 3, native system also output comprises the 4th predictive PI controller 5 that is connected with the 3rd predictive PI controller 4 inputs, store cold-zone moisture setting value in the 4th predictive PI controller 5, be provided with the cold-zone device for measuring moisture that is connected with the 4th predictive PI controller 5 inputs in the cold-zone, the 4th predictive PI controller 5 serves as that the control target is regulated the dry section desired temperature with cold-zone moisture.
Because the distance from roasting sheet machine entrance to the ordering room outlet is very long, the production process time is very long, if the temperature that the actual moisture of tobacco leaf that outlet is produced according to ordering room goes to adjust back dry section can form serious hysteresis, brings bigger interference for the control of moisture.For further improving control accuracy, under the prerequisite that does not influence technological requirement, native system carries out constrained closed-loop control to the cold-zone moisture content of outlet, and with the feed forward variable of cold-zone moisture content of outlet as ordering room moisture content of outlet control loop.Therefore can native system production line be regarded as by dry section (cold-zone) and two of ordering rooms and partly formed.As shown in Figures 2 and 3, Qian Bu control target is the cold-zone moisture content of outlet.As regulating measure, constitute the control of cold-zone moisture and dry section temperature tandem with the dry section temperature.At first by the temperature of the 3rd predictive PI controller 4 with the flow-control dry section of vapours, on this basis, uniting with cold-zone moisture by the 4th predictive PI controller 5 and the 3rd predictive PI controller 4 is target, regulate the desired temperature of dry section, make cold-zone moisture value control within a reasonable range.
In addition, native system can also be controlled the cold-zone temperature, as shown in Figure 4.Other establishes predictive PI controller and is connected with the cold-zone, and predictive PI controller, is controlled chilling temperature as FEEDFORWARD CONTROL with the temperature of ordering room outlet.
Native system is moisture content in leaves and the temperature of ordering room outlet to the control target at roasting sheet machine rear portion, as shown in Figure 5, native system also comprises the 6th predictive PI controller 7 that the 5th predictive PI controller 6 that is connected with the ordering room entrance of roasting sheet machine and output are connected with the 5th predictive PI controller 6 inputs; Store ordering room desired temperature and roasting sheet machine moisture content of outlet setting value in the 5th predictive PI controller 6, be provided with the ordering room temperature measuring equipment that is connected with the 5th predictive PI controller 6 inputs in the ordering room, the ordering room outlet is provided with the roasting sheet machine moisture content of outlet measurement mechanism that is connected with the 5th predictive PI controller 6 inputs, the 5th predictive PI controller 6 is by regulating each temperature of distinguishing of heating steam amount control ordering room of ordering room, and the 5th predictive PI controller 6 is regulated the amount of water of ordering room according to roasting sheet machine moisture content of outlet.Store roasting sheet machine outlet tobacco leaf desired temperature in the 6th predictive PI controller 7, the ordering room outlet is provided with the roasting sheet machine outlet tobacco leaf temperature measuring equipment that is connected with the 6th predictive PI controller 7 inputs, and the 6th predictive PI controller 7 is that target is regulated the ordering room desired temperature automatically with the tobacco leaf temperature of roasting sheet machine outlet.Wherein, ordering room comprises a plurality of moisture regain district that connects successively, and the 5th predictive PI controller 6 possesses anti-hysteresis decoupling zero function for the multiple-input, multiple-output type controller, and it is connected simultaneously with many moisture regain district respectively.Ordering room is generally imported the water yield by high-pressure pump.
Native system roasting sheet machine rear portion control is regulating measure with ordering room temperature and amount of water, constitutes the control of temperature moisture decoupling zero tandem.The temperature of the heating steam control ordering room of ordering room, the tobacco leaf temperature that exports with roasting sheet machine is target, regulates the desired temperature of ordering room automatically; Regulate amount of water according to roasting sheet machine moisture content of outlet.Owing to exist stronger coupling between temperature and the moisture in the ordering room, therefore adopt the decoupling zero control algolithm, can effectively moisture content in leaves and the temperature of outlet be controlled within the technological requirement scope.For accelerating the response of control system, improve the control accuracy of final goal, with the disturbance variable as rear portion control such as cold-zone moisture content of outlet and chain vehicle speed, carry out FEEDFORWARD CONTROL again.
There is the influence of factors such as non-linear, uncertainty in the real system, in the predictive control algorithm of each controller, based on the prediction output of varying model can not be not in full accord with the actual output of system, and in the rolling optimization process, require model output and real system output to be consistent again, for this reason, Model Predictive Control adopts the error between the actual output of process and the model output to carry out feedback compensation and remedies this defective, and such rolling optimization can overcome the uncertainty in the system effectively.
Simultaneously, ordering room moisture content of outlet and cold-zone moisture noise jamming can occur when measuring, have a strong impact on the operate as normal of native system.Native system adopts advanced numerical filtering method to eliminate interference of noise, changes the delay that general filtering method causes, and the dynamic characteristic ratio of adaptation ordering room moisture content of outlet is characteristics faster, improve anti-jamming capacity, improve filter effect.
Claims (10)
1. tobacco redrying system, comprise tobacco leaf moisting machine and roasting sheet machine, tobacco leaf moisting machine comprises heat exchanger and leaves moisting tube, roasting sheet machine comprises the dry section that connects successively, cold-zone and ordering room, it is characterized in that, also comprise first predictive PI controller and second predictive PI controller, store leaves moisting tube tobacco leaf desired temperature in first predictive PI controller, store the hot blast temperature setting value in second predictive PI controller, the outlet of leaves moisting tube is provided with the first tobacco leaf temperature measuring equipment, be provided with the hot blast temperature measurement mechanism in the heat exchanger, the first tobacco leaf temperature measuring equipment is connected with the input of first predictive PI controller, the output of first predictive PI controller is connected with the input of hot blast temperature measurement mechanism with second predictive PI controller, and the output of second predictive PI controller is connected with heat exchanger.
2. tobacco redrying according to claim 1 system, it is characterized in that, the entrance and exit of tobacco leaf moisting machine is respectively equipped with inlet steam valve and the outlet steam valve that all is connected with the first predictive PI controller output, the tobacco leaf moisting machine outlet also is provided with the moisture content in leaves checkout gear that is connected with the first predictive PI controller input, also store the aperture limiting value of inlet steam valve and outlet steam valve in first predictive PI controller, first predictive PI controller is according to the aperture of moisture content in leaves control inlet steam valve and the outlet steam valve in aperture limiting value and tobacco leaf moisting machine exit.
3. tobacco redrying according to claim 2 system, it is characterized in that, described tobacco leaf moisting machine porch also is provided with the feed rate signal supervisory instrument that is connected with the first predictive PI controller input, and first predictive PI controller is according to the humidification quantity of steam in feed rate signal and the moisture content of outlet adjusting tobacco leaf moisting machine.
4. tobacco redrying according to claim 2 system, it is characterized in that, also comprise the 3rd predictive PI controller that is connected with the dry section entrance of roasting sheet machine, store the dry section desired temperature in the 3rd predictive PI controller, be provided with the dry section temperature measuring equipment that is connected with the 3rd predictive PI controller input in the dry section, the 3rd predictive PI controller is controlled the temperature of dry section by steam flow in the control dry section.
5. tobacco redrying according to claim 4 system, it is characterized in that, also comprise the 4th predictive PI controller that output is connected with the 3rd predictive PI controller input, store cold-zone moisture setting value in the 4th predictive PI controller, be provided with the cold-zone device for measuring moisture that is connected with the 4th predictive PI controller input in the cold-zone, the 4th predictive PI controller serves as that the control target is regulated the dry section desired temperature with cold-zone moisture.
6. tobacco redrying according to claim 4 system, it is characterized in that, described dry section comprises connect successively a plurality of, the 3rd predictive PI controller is the multiple-input, multiple-output type controller, the input of multiple-input, multiple-output type controller is connected with the output of the 4th predictive PI controller, its output is connected with a plurality of dry sections respectively, controls the temperature of a plurality of dry sections respectively.
7. tobacco redrying according to claim 1 system, it is characterized in that, also comprise the 5th predictive PI controller that is connected with the ordering room entrance of roasting sheet machine, store the ordering room desired temperature in the 5th predictive PI controller, be provided with the ordering room temperature measuring equipment that is connected with the 5th predictive PI controller input in the ordering room, the 5th predictive PI controller is by regulating each temperature of distinguishing of heating steam amount control ordering room of ordering room.
8. tobacco redrying according to claim 7 system, it is characterized in that, also comprise the 6th predictive PI controller that output is connected with the 5th predictive PI controller input, store roasting sheet machine outlet tobacco leaf desired temperature in the 6th predictive PI controller, the ordering room outlet is provided with the roasting sheet machine outlet tobacco leaf temperature measuring equipment that is connected with the 6th predictive PI controller input, and the 6th predictive PI controller is that target is regulated the ordering room desired temperature automatically with the tobacco leaf temperature of roasting sheet machine outlet.
9. tobacco redrying according to claim 8 system, it is characterized in that, store roasting sheet machine moisture content of outlet setting value in the 5th predictive PI controller, the ordering room outlet is provided with the roasting sheet machine moisture content of outlet measurement mechanism that is connected with the 5th predictive PI controller input, and the 5th predictive PI controller is regulated the amount of water of ordering room according to roasting sheet machine moisture content of outlet.
10. tobacco redrying according to claim 7 system is characterized in that, described ordering room comprises a plurality of moisture regain district that connects successively, and the 5th predictive PI controller is the multiple-input, multiple-output type controller, and it is connected simultaneously with many moisture regain district respectively.
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| CN 201220737298 CN203028084U (en) | 2012-12-28 | 2012-12-28 | Tobacco re-drying system |
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| CN 201220737298 CN203028084U (en) | 2012-12-28 | 2012-12-28 | Tobacco re-drying system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104068460A (en) * | 2014-07-21 | 2014-10-01 | 江西中烟工业有限责任公司井冈山卷烟厂 | Tobacco moisture content and temperature regulation control method |
| CN111248480A (en) * | 2020-04-01 | 2020-06-09 | 贵州中烟工业有限责任公司 | Mesh belt direct drying and redrying process with four drying areas |
| 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 |
| CN115444158A (en) * | 2022-09-27 | 2022-12-09 | 湖北中烟工业有限责任公司 | Tobacco redrying method, system and device and computer readable storage medium |
-
2012
- 2012-12-28 CN CN 201220737298 patent/CN203028084U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104068460A (en) * | 2014-07-21 | 2014-10-01 | 江西中烟工业有限责任公司井冈山卷烟厂 | Tobacco moisture content and temperature regulation control method |
| CN104068460B (en) * | 2014-07-21 | 2015-11-25 | 江西中烟工业有限责任公司井冈山卷烟厂 | A kind of control method regulating tobacco leaf moisture content, temperature |
| CN111248480A (en) * | 2020-04-01 | 2020-06-09 | 贵州中烟工业有限责任公司 | Mesh belt direct drying and redrying process with four drying areas |
| CN111248480B (en) * | 2020-04-01 | 2021-10-15 | 贵州中烟工业有限责任公司 | Mesh belt direct drying and redrying process with four drying areas |
| 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 |
| CN115444158A (en) * | 2022-09-27 | 2022-12-09 | 湖北中烟工业有限责任公司 | Tobacco redrying method, system and device and computer readable storage medium |
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Granted publication date: 20130703 |