CN106954878B - Suitable for the tobacco dry tenacity automatic regulating system and its method of the hot air combined drying process of microwave fixed bed - Google Patents
Suitable for the tobacco dry tenacity automatic regulating system and its method of the hot air combined drying process of microwave fixed bed Download PDFInfo
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- CN106954878B CN106954878B CN201710192855.2A CN201710192855A CN106954878B CN 106954878 B CN106954878 B CN 106954878B CN 201710192855 A CN201710192855 A CN 201710192855A CN 106954878 B CN106954878 B CN 106954878B
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/04—Humidifying or drying tobacco bunches or cut tobacco
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
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- Automation & Control Theory (AREA)
- Drying Of Solid Materials (AREA)
Abstract
A kind of tobacco dry tenacity automatic regulating system suitable for the hot air combined drying process of microwave fixed bed, including drying equipment main body and associated with it and can be to automatic feed/discharge control unit that its course of work and condition are controlled, heated-air drying control unit, barrel temperature control unit, detection control unit and microwave power control unit, disengaging material unit are made of feed inlet, discharge valve, elephant trunk, hanging basket, material receiver；Heated-air drying control unit and barrel temperature control unit are made of temperature sensor, electric heater and driving device；Detection control unit includes programmable controller, computer etc.；Microwave power control unit includes microwave generator and its driving device；Each control unit, which is connected with programmable controller and computer and receives it, to be instructed and performs.The system can according to moisture during dry materials than variation come the power of drying unit each in control device, it is final to obtain the more stable combined drying product of quality.
Description
Technical field
The invention belongs to tobacco drying apparatus control system, it is specifically a kind of can real-time monitoring microwave fixed bed hot wind connection
Close the control system and its method of tobacco dry tenacity in drying process.
Background technology
Microwave fixed bed hot air combined drying equipment can take into account the advantages of microwave drying and fixed bed heated-air drying simultaneously,
Processed material discharge position can be changed, improve the uniformity of microwave, it can be achieved that effective control to microwave, accelerates rate of drying, compared with
The flavor components such as the good original color, smell and taste of reservation dried material, obtain desciccate best in quality.
However, existing microwave fixed bed hot air combined drying equipment, data are obtained merely by experiment or experience
The drying process of material is controlled, although quality of material can be obtained in drying process in real time, equipment body barrel temperature
And the parameters such as hot blast temperature, but be necessarily required to operating personnel and its Parameters variation is monitored, behaviour will certainly be increased in this way
Error caused by work increases labour cost, reduces working efficiency.
Recent study finds the drying tobacco material later stage, is dried using segmented, lowers dry processing intensity, compared to
Traditional converted products by the way of fixed manufacturing parameter can significantly improve cigarette product organoleptic quality.However existing segmentation
Drying process is sequential control method, i.e., the processing of different drying conditions is carried out in the different drying time section of material.This when
Sequence controlling method does not consider the variation of degree of dehydration during dry materials, i.e., in different drying stages to dry materials condition
Regulation and control only only in accordance with drying time, variation and non-correlation with material dewatering state itself.It is different to initial aqueous rate
Identical material, the temporal regulation method are difficult to achieve the purpose that consistency is processed.Meanwhile for the different object of dehydration complexity
Material, the regulation and control method lack universality.Therefore, it is steady to cannot be guaranteed that tobacco processing enterprise obtains quality on a large scale for existing regulation and control method
Fixed cigarette product.
Based on this, it is necessary to invent a kind of control system using Computer Control Technology, which can be according to drying
The variation of material dewatering state in the process carries out automatic on-line control to the hot air combined dry tenacity of microwave fixed bed.Computer
There is programmable control operation, for machined parameters once setting, material can one-touch ground output, significantly attenuating behaviour
Make personnel labor intensity, improve working efficiency.Meanwhile using the accurate reliable advantage of computer control system, it can enhance
To the controllability of dry materials process, the quality of dry products is made more to stablize, be conducive to the hot air combined drying of microwave fixation and set
Standby further genralrlization is popularized.
Invention content
The purpose of the present invention is exactly that the one kind for being directed to existing microwave fixed bed heated-air drying equipment and specially designing is applicable in
In the dry materials intensity automatic regulating system of the hot air combined drying process of microwave fixed bed, which can be according to dry materials
In the process moisture than variation carry out the power of each drying unit in control device, it is final to obtain more stable the combining of quality and do
Dry product.
The purpose of the present invention is achieved through the following technical solutions：
A kind of tobacco dry tenacity automatic regulating system suitable for the hot air combined drying process of microwave fixed bed, packet
Include drying equipment main body and associated with the drying equipment main body and can be controlled its course of work and condition automatic
Input and output material control unit, heated-air drying control unit, barrel temperature control unit, detection control unit and microwave power control
Unit, automatic feed/discharge unit are made of feed inlet, discharge valve, elephant trunk, hanging basket, material receiver；Heated-air drying control unit be by
Hot blast temperature sensor, hot blast electric heater, Hot-blast Heating driving device composition；Barrel temperature control unit is by barrel temperature
Sensor, barrel electric heater, barrel heater driver composition；Detection control unit includes programmable controller, computer
And alarm；Microwave power control unit includes microwave generator and microwave-driven device；Each control unit is and programmable control
Device and computer processed, which are connected and receive it, to be instructed and performs.
Hot blast temperature and the control of barrel temperature are controlled using programmable controller, are realized by PID control method to temperature
Real-time feedback control, so as to achieve the purpose that constant temperature.
After drying program starts in the present invention, automatic feed/discharge system can be automatically transported in hanging basket, when drying terminates
The pneumatic discharge plate of hanging basket is opened afterwards, and material is along chute automatically into material receiver.Whole process without human intervention, need to only shift to an earlier date
Set drying program.Heated-air drying control unit and barrel temperature control unit are all by fibre optic temperature sensor, electrical heating
Device, electrothermal driving device composition control heater to generate heat and hot wind and barrel temperature are maintained to protect by heater driver
It holds constant in predetermined value.
Detection control unit is mainly made of programmable controller and computer, and programmable controller is as entire controller
Center, can realize drying parameter pre-set and drying programization setting function.Window of the computer as human-computer interaction
Mouthful, it is dry start before, need in the initial wet basis moisture content and initial input to computer of material in advance, according to processing technology item
Part carries out drying process sequencing setting, and arrange parameter includes the flow of hot-air in different drying sections, the temperature of hot-air
Power of degree, barrel temperature and microwave generator etc..Meanwhile detection control unit is by data line and day flushconnection, it can be with
The mass parameter of material is obtained in real time, and the time of acquisition and corresponding qualitative data are transferred to computer, in a computer
Data are recorded and are analyzed.
Microwave power control unit is mainly controlled by programmable controller, and microwave-driven device receives controlling transmission
After instruction, driving microwave generator works according to preset power.Due to the work of drying process requirement microwave generator
Power can real-time change, therefore needed in microwave-driven device install frequency conversion component.
Using above-mentioned automatic regulating system to tobacco withering method, be as follows：
1), machine preheats：Start microwave hot air combined dry automatic regulating system, the control of preheating section is set in computer
Parameter（Barrel temperature, hot blast temperature, hot air flow）, data storage in a computer, by machine compiling be transferred to it is programmable
Controller, programmable controller receive instruction after start after mass flow controller be transported to dry main body according to predetermined wind amount
In, while Hot-blast Heating driving device, barrel heater driver are received after controlling signal, start hot blast electric heater and cylinder
Wall electric heater is respectively heated air and barrel, and the temperature sensor of two units can be in real time by hot blast temperature and barrel
Temperature parameter feeds back to programmable controller, when hot blast temperature and barrel temperature reach predetermined temperature value, programmable controller
Heater driver is sent instructions to, control heater is stopped；When temperature is less than preset temperature, restarting heating
Device, constantly by detecting, feeding back, controlling hot blast temperature and barrel temperature is made to reach stationary value；
2）Program setting：After preheating about two hours, drying program is added according to the requirement of drying process, is set each dry
The control parameter of dry workshop section includes the barrel temperature of final butt moisture ratio, each workshop section's butt moisture ratio and corresponding workshop section, heat
Air temperature, hot air flow, microwave power；The initial wet basis moisture content of dried materialω 0It is set in advance and is stored into computer,
The data transfer mode of this part is similar to warm-up phase, and order register is in programmable controller after computer compiles；
3）Balance returns to zero：Appropriate amount of sample is taken to be put into feed inlet, and immediately closes off feed inlet chamber door, is operated in a computer
It is zeroed out to being located at the balance at the top of microwave fixed bed hot air combined drying equipment, programmable controller receives the finger of computer
After order, control balance returns to zero；
4）Dry materials：After computer starting drying, programmable controller receives the order of computer, is transferred to pneumatic
Control valve makes the material in feeder be slipped on the hanging basket of balance along elephant trunk, while balance is by the initial mass of materialm 0Transmission
Programmable controller is returned, is stored in a computer；Later real-time quality of storage is transmitted every 5sm t .Meanwhile temperature
By the similar instruction transmission process with warm-up phase between sensor, heater driver, heater three, hot wind temperature is controlled
Degree and barrel temperature；Unlike, the object that programmable controller can arrive hot blast temperature sensor, barrel temperature sensor monitors
Expect surface temperatureT s, barrel temperatureT dComputer is transmitted back to, and is preserved and is shown in a computer；Microwave-driven device connects
After the instruction sent out by programmable controller, driving microwave generator starts carries out microwave drying, the power of microwave to material
Data will also be collected by programmable controller and be transmitted back to computer；
5）Workshop section changes：Two kinds of control models of change Primary Reference of drying process：Moisture ratioMRPattern and timetMould
Formula, programmable controller can obtain the quality of material data that balance is collected into real time, and pass through mass balance formula calculate it is dry
Dry material moisture content of drying baseX tWith initial moisture content of drying baseX 0Ratio, i.e. moisture ratioMR：
It follows that moisture than variation range be 1 ~ 0.Drying program just starts timing once starting；
When select using moisture than the pattern of foundation that pattern changes as drying process when, programmable controller real-time collecting
The moisture of material is calculated than MR, when detecting pre-set moisture ratio of the moisture than being less than current drying section, starts to start next
Drying program transmits instructions to Hot-blast Heating driving device, mass flow controller, barrel heater driver and microwave and drives
Dynamic device changes the technological parameters such as hot blast temperature, hot air flow, barrel temperature, microwave power, control microwave fixed bed hot wind connection
Drying equipment is closed to start to work.When it is dry be equipped with n drying section when, with moisture than variation, microwave fixed bed hot wind joins
Drying equipment is closed will also to adjust microwave power or hot blast temperature according to more than control method, sequentially enter next drying section, directly
Reach final moisture ratio to moisture ratioMR e；
When the foundation for selecting to change using temporal mode as drying section, control principle is more identical than pattern with moisture, i.e.,
When drying time reaches preset value, programmable controller starts next drying section；
6）Abnormal alarm：When in drying process programmable controller receive hot blast temperature, hot air flow, barrel temperature with
And microwave power, when abnormal parameters, controller, which will give an order, immediately closes off entire microwave fixed bed hot air combined drying equipment,
And alarm is issued instructions to, operating personnel is reminded to check equipment in time in the form of alarm；
7）Terminate to remind：When programmable controller detects that material moisture ratio is less than scheduled final butt moisture ratio,
Each driving device and mass flow controller are sent instructions to, closes microwave generator, storage heater and barrel heating
Device terminates entire drying process.Meanwhile hanging basket is sent instructions to, material is made to enter elephant trunk, skids off material receiver；Alarm
It starts to work after receiving the instruction of programmable controller, until operating personnel take out dry products, alarm stops.
The present invention has the following advantages：
1. the present invention can realize automatic feed and the self-emptying of drier, it is microwave hot air combined dry to reduce manual operation
The experimental error that dry device band is come effectively controls the precision of experimental result.
2. the present invention can set multiple drying processes, meet stage drying, intermittently drying, combined drying, single drying
Etc. the requirement of different drying process, two kinds of control models are taken into account, can realize a tractor serves several purposes, improve operating efficiency.
3. the foundation that the present invention is judged by moisture than being used as dry tenacity can be effectively prevented from the not true of experiential operating
It is qualitative, the stability of dry products is improved, ensures the quality of product.
4. the present invention is equipped with autoalarm, at the end of there is unexpected situation or drying in drying process, alarm dress
The timely check device of operator can be reminded, collect product by putting.
Description of the drawings
Fig. 1 is the dry materials intensity automatic regulating system signal suitable for the hot air combined drying process of microwave fixed bed
Figure.
In Fig. 1：1st, feed inlet, 2, pneumatic discharge valve, 3, elephant trunk, 4, hanging basket, 5, drying equipment main body, 6, material receiver, 7,
Hot blast temperature sensor, 7 ', barrel temperature sensor；8th, hot blast electric heater, 8 ', barrel electric heater；9th, hot wind electrical heating
Driving device, 9 ', barrel electrothermal driving device, 10, mass flow controller, 11, programmable controller, 12, computer,
13rd, microwave generator, 14, microwave-driven device, 15, alarm.
Fig. 2 is the moisture of the hot air combined dried material dry tenacity of microwave fixed bed than MR mode control flow figures.
Different workshop section's microwave powers and hot blast temperature control change schematic diagram under Fig. 3 MR control models.
Specific embodiment
The present invention and its method of work are described further below in conjunction with the attached drawing of the present invention：
The purpose of the present invention is achieved through the following technical solutions：It is hot air combined dry that one kind is suitable for microwave fixed bed
The tobacco dry tenacity automatic regulating system of dry process, including drying equipment main body 5 and with the drying equipment main body phase
Association and can be to the automatic feed/discharge control unit that its course of work and condition are controlled, heated-air drying control unit, barrel
Temperature control unit, detection control unit and microwave power control unit, automatic feed/discharge unit is by feed inlet 1, discharge valve
2nd, elephant trunk 3, hanging basket 4, material receiver 6 are formed；Heated-air drying control unit be by hot blast temperature sensor 7, hot blast electric heater 8,
Hot-blast Heating driving device 9 forms；Barrel temperature control unit is by barrel temperature sensor 7 ', barrel electric heater 8 ', cylinder
Wall heater driver 9 ' forms；Detection control unit includes programmable controller 11, computer 12 and alarm 15；Microwave work(
Rate control unit includes microwave generator 13 and microwave-driven device 14；Each control unit with programmable controller and computer
It is connected and receives it and instructs and perform.
In actual use, concrete implementation step is as follows：
1. machine preheats.Start microwave hot air combined apparatus for control of drying, the control of preheating section is set in computer (12)
Parameter（Barrel temperature, hot blast temperature, hot air flow）, for data storage in computer (12), being transferred to by machine compiling can
Programmable controller (11).Programmable controller (11) receive instruction after start after mass flow controller (10) according to predetermined wind
After amount is transported in drying equipment main body (5), while heater driver (9,9 ') receives control signal, starts hot wind electricity and add
Hot device (8) and barrel electric heater (8 ') are respectively heated air and barrel.The temperature sensor (7,7 ') of two units
Can hot blast temperature and barrel temperature parameter be fed back into programmable controller in real time, when hot blast temperature and barrel temperature reach predetermined
During temperature value, controller sends instructions to heater driver (9,9 '), and two heaters of control are stopped.When temperature is less than pre-
If during temperature, restart two heaters.Constantly by monitoring, feeding back, controlling hot blast temperature and barrel temperature is made to reach stable
Value.
2. program setting.After preheating about two hours, drying program is added according to the requirement of drying process, is set each dry
The control parameter of dry workshop section, including final butt moisture ratio（MR e）, each workshop section's butt moisture ratio（MR 1, MR 2,…,MR n）And
Corresponding barrel temperature（Tg 1, Tg 2,…,Tg n）, hot blast temperature（Ta 1, Ta 2,…,Ta n）, hot air flow（q 1, q 2,…,q n）, microwave power（W 1, W 2,…,W n）.The initial wet basis moisture content of dried materialω 0It is set in advance and is stored into computer
(12) in.The data transfer mode of this part is similar to warm-up phase, and order register is programmable after computer compiles
Controller (11).
3. balance returns to zero.5g samples is taken to be put into feed inlet (1), and immediately close off feed inlet chamber door.In computer (12)
Middle operation is zeroed out balance.After programmable controller (11) receives the instruction of computer, control balance returns to zero.
4. dry materials.After computer (12) starts drying, controller (11) receives the order of computer (12), transmission
The material in feeder is made to be slipped on hanging basket (4) along elephant trunk to pneumatic discharge valve (2), while balance is by the initial mass of materialm 0Controller (11) is transmitted back to, is stored in calculator (12).Later real-time quality of storage is transmitted every 5sm t .Together
When, pass through the similar instruction transmission process with warm-up phase, control between temperature sensor, heater, heater driver three
Heat air temperature and barrel temperature.Unlike, programmable controller (11) can be by hot blast temperature sensor, barrel temperature sensing
The material surface temperature that device monitorsT s, barrel temperatureT dBe transmitted back to computer (12), and carry out in computer (12) preserving and
Display.After microwave-driven device (14) receives the instruction that control centre sends out, driving microwave generator (13) starts to material
Microwave drying is carried out, the data of the power of microwave will also be collected by controller and be transmitted back to computer (12).
5. workshop section changes.The change Primary Reference both of which of drying process：Moisture is than MR pattern and timetPattern.It is dry
Dry program just starts timing once starting.
When select using moisture than the pattern of foundation that pattern changes as drying process when, controller (11) real-time collecting meter
Calculate material moisture ratioMR, when detectingMR 2<MR<MR 1When, start drying section 1, transmit instructions to Hot-blast Heating driving device
(9), mass flow controller (10), barrel heater driver (9) and microwave-driven device (14), change hot blast temperature,
The technological parameters such as hot air flow, barrel temperature, microwave power, control drier are started to work.When controller detectsMR 3<MR<MR 2When, drying equipment enters workshop section 2.When drying is equipped with n drying section, drying device also will be according to above judgement side
Method sequentially enters next drying section, until workshop section n.
When selecting the foundation changed using temporal mode as drying section in computer (12), control principle and moisture
More identical than pattern, i.e., when drying time reaches preset value, programmable controller (11) starts next drying section.Specific controlling party
Method can be with reference chart 3.
6. abnormal alarm.When programmable controller (11) receives hot blast temperature, hot air flow, barrel temperature in drying process
When abnormal parameters, controller (11) will immediately close off entire drying device, and issue instructions to alarm for degree and microwave power
Device (15) reminds operating personnel to check equipment in time in the form of alarm.
Terminate to remind.When controller (11) monitors materialMR<MR eWhen, send instructions to each driving device (9,14)
With flow controller (10), microwave generator (13), storage heater (7) and barrel heater (8) are closed, is terminated entire dry
Dry process.Meanwhile hanging basket (4) is sent instructions to, material is made to enter elephant trunk (3), skids off material receiver (6).Alarm (15)
It starts to work after receiving the instruction of controller, until operating personnel take out dry products, alarm stops.
Claims (4)
1. a kind of tobacco dry tenacity automatic regulating system suitable for the hot air combined drying process of microwave fixed bed, special
Sign is：It is associated including drying equipment main body and with the drying equipment main body and its course of work and condition can be controlled
The automatic feed/discharge control unit of system, heated-air drying control unit, barrel temperature control unit, detection control unit and microwave
Power control unit, automatic feed/discharge unit are made of feed inlet, discharge valve, elephant trunk, hanging basket, material receiver；Heated-air drying controls
Unit is made of hot blast temperature sensor, hot blast electric heater, Hot-blast Heating driving device；Barrel temperature control unit be by
Barrel temperature sensor, barrel electric heater, barrel heater driver composition；Detection control unit includes PLC technology
Device, computer and alarm；Microwave power control unit includes microwave generator and microwave-driven device；Each control unit with
Programmable controller and computer, which are connected and receive it, to be instructed and performs；Hot blast temperature and the control of barrel temperature are using programmable
Controller controls, and the real-time feedback control to temperature is realized by PID control method, so as to achieve the purpose that constant temperature.
2. the tobacco dry tenacity according to claim 1 suitable for the hot air combined drying process of microwave fixed bed is certainly
Dynamic regulator control system, it is characterised in that：Frequency conversion component is installed in the microwave-driven device, to adapt to microwave generator power
Real-time change.
3. the tobacco dry tenacity according to claim 1 suitable for the hot air combined drying process of microwave fixed bed is certainly
Dynamic regulator control system, it is characterised in that:The temperature sensor is fibre optic temperature sensor.
4. a kind of, using automatic regulating system described in claim 1, to tobacco, withering method, feature exist
In：It is as follows：
1), machine preheats：Start microwave hot air combined dry automatic regulating system, the control parameter of preheating section is set in computer
（Barrel temperature, hot blast temperature, hot air flow）, data storage in a computer, by machine compiling be transferred to PLC technology
Device, programmable controller receive instruction after start after mass flow controller be transported in dry main body according to predetermined wind amount,
After Hot-blast Heating driving device, barrel heater driver receive control signal simultaneously, start hot blast electric heater and barrel
Electric heater is respectively heated air and barrel, and the temperature sensor of two units can be in real time by hot blast temperature and barrel temperature
Parameter feedback is spent to programmable controller, when hot blast temperature and barrel temperature reach predetermined temperature value, programmable controller hair
Sending instruction, control heater is stopped to heater driver；When temperature is less than preset temperature, heater is restarted,
Constantly by detecting, feeding back, controlling hot blast temperature and barrel temperature is made to reach stationary value；
2）Program setting：After preheating about two hours, drying program is added according to the requirement of drying process, each back tender is set
The control parameter of section includes the barrel temperature of final butt moisture ratio, each workshop section's butt moisture ratio and corresponding workshop section, hot wind temperature
Degree, hot air flow, microwave power；The initial wet basis moisture content of dried materialω 0It is set in advance and is stored into computer, this
Partial data transfer mode is similar to warm-up phase, and order register is in programmable controller after computer compiles；
3）Balance returns to zero：Appropriate amount of sample is taken to be put into feed inlet, and immediately closes off feed inlet chamber door, in a computer operation contraposition
Balance at the top of microwave fixed bed hot air combined drying equipment is zeroed out, and programmable controller receives the instruction of computer
Afterwards, control balance returns to zero；
4）Dry materials：After computer starting drying, programmable controller receives the order of computer, is transferred to pneumatic control
Valve makes the material in feeder be slipped in the hanging basket of balance along elephant trunk, while balance is by the initial mass of materialm 0Being transmitted back to can
Programmable controller is stored in a computer；Later real-time quality of storage is transmitted every 5sm t ；Meanwhile temperature sensing
By the similar instruction transmission process with warm-up phase between device, heater driver, heater three, control hot blast temperature and
Barrel temperature；Unlike, the material table that programmable controller can arrive hot blast temperature sensor, barrel temperature sensor monitors
Face temperatureT s, barrel temperatureT dComputer is transmitted back to, and is preserved and is shown in a computer；Microwave-driven device receives
After the instruction that programmable controller is sent out, driving microwave generator starts carries out microwave drying, the number of the power of microwave to material
According to will also be collected by programmable controller and be transmitted back to computer；
5）Workshop section changes：Two kinds of control models of change Primary Reference of drying process：Moisture ratioMRPattern and timetPattern, can
Programmable controller can obtain the quality of material data that balance is collected into real time, and pass through mass balance formula and calculate dried material
Moisture content of drying baseX tWith initial moisture content of drying baseX 0Ratio, i.e. moisture ratioMR：
It follows that moisture than variation range be 1 ~ 0；Drying program just starts timing once starting；
When select using moisture than the pattern of foundation that pattern changes as drying process when, programmable controller real-time collecting calculates
The moisture of material, when detecting pre-set moisture ratio of the moisture than being less than current drying section, starts to start next drying than MR
Program transmits instructions to Hot-blast Heating driving device, mass flow controller, barrel heater driver and microwave-driven dress
It puts, changes the technological parameters such as hot blast temperature, hot air flow, barrel temperature, microwave power, control microwave fixed bed is hot air combined dry
Dry equipment is started to work；When it is dry be equipped with n drying section when, with moisture than variation, microwave fixed bed is hot air combined to be done
Dry equipment will also adjust microwave power or hot blast temperature, sequentially enter next drying section, Zhi Daoshui according to more than control method
Ratio is divided to reach final moisture ratioMR e；
When the foundation for selecting to change using temporal mode as drying section, control principle is more identical than pattern with moisture, i.e. drying
When time reaches preset value, programmable controller starts next drying section；
6）Abnormal alarm：When programmable controller receives hot blast temperature, hot air flow, barrel temperature and micro- in drying process
For wave power when abnormal parameters, controller, which will give an order, immediately closes off entire microwave fixed bed hot air combined drying equipment, concurrently
Go out instruction to alarm, operating personnel is reminded to check equipment in time in the form of alarm；
Terminate to remind：When programmable controller monitors that material moisture ratio is less than scheduled final butt moisture ratio, transmission refers to
It enables to each driving device and mass flow controller, closes microwave generator, storage heater and barrel heater, terminate
Entire drying process；Meanwhile hanging basket is sent instructions to, material is made to enter elephant trunk, skids off material receiver；Alarm also receives
It starts to work after the instruction of programmable controller, until operating personnel take out dry products, alarm stops.
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| CN108077990A (en) * | 2017-11-30 | 2018-05-29 | 红云红河烟草(集团)有限责任公司 | A kind of binodal microwave baking roller and its method applied to baking upgrading |
| CN109028763B (en) * | 2018-07-03 | 2020-12-04 | 安徽辰宇机械科技有限公司 | Heat supply control method for grain dryer |
| CN109717502A (en) * | 2019-02-20 | 2019-05-07 | 上海烟草集团有限责任公司 | The pre-heating mean of cut tobacco drying equipment under cold turner condition |
| CN110286199B (en) * | 2019-06-17 | 2021-09-21 | 云南中烟工业有限责任公司 | Method for evaluating consistency of cut tobacco processing strength in drum drying process based on cut tobacco moisture evaporation enthalpy |
| CN110208322B (en) * | 2019-06-24 | 2022-03-18 | 河南科技大学 | Grain drying machine and grain moisture detection method thereof |
| CN111616404A (en) * | 2020-06-05 | 2020-09-04 | 安徽中烟工业有限责任公司 | Microwave drying method for heating particles for cigarettes |
| CN111895758B (en) * | 2020-08-12 | 2021-11-09 | 贵州中烟工业有限责任公司 | Control method of drying device for tobacco shredding |
| CN112471572B (en) * | 2020-12-25 | 2022-05-24 | 河南中烟工业有限责任公司 | Method and system for controlling consistency of processing strength of tobacco tunnel type temperature increasing equipment |
| CN113303490A (en) * | 2021-06-15 | 2021-08-27 | 上海恒博自动化设备有限公司 | Heating non-combustion sheet tobacco paper on-line drying device |
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|---|---|---|---|---|
| CN104006638A (en) * | 2014-06-19 | 2014-08-27 | 中国烟草总公司郑州烟草研究院 | Microwave fixed bed hot air combined drying experimental device suitable for on-line analysis |
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