CN105157407B - Drier controlling method and its control system - Google Patents
Drier controlling method and its control system Download PDFInfo
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- CN105157407B CN105157407B CN201510701898.XA CN201510701898A CN105157407B CN 105157407 B CN105157407 B CN 105157407B CN 201510701898 A CN201510701898 A CN 201510701898A CN 105157407 B CN105157407 B CN 105157407B
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Abstract
Present invention is disclosed a kind of drier controlling method, this method can set one, two-stage temperature, and the parameter and Target moisture difference and real-time delivery of control are to PLC controller.The numerical value of PLC controller real-time reception temperature sensor and Moisture Meter obtains Current Temperatures and grain moisture value, and passes through logic control heat source combustor and two sections of fire.Present invention realization dryer determines moisture drying course, by variable temperature control in drying course, can greatly improve drying efficiency and quality.
Description
Technical field
The present invention relates to dryer field more particularly to the change temperature control systems of grain drying machine.
Background technology
Temperature is to influence a principal element of grain-drying process, the height of temperature directly affect grain-drying efficiency and
Quality, and moisture is the final control object of drying, the final effect of drying is to ensure certain drying moisture, and drying moisture is
Ensured by controlling drying temperature.
However, existing dryer product is to carry out thermostatic control, it is desirable that stationary temperature is the guarantee of dries quantity, but
Though stationary temperature can ensure dries quantity, it is unfavorable for improving drying efficiency, so as to ensure dries quantity, influences product
Quality.
Invention content
The technical problems to be solved by the invention be realize it is a kind of can be in drying course by the baking of variable temperature control
Dry machine control method and system.
To achieve these goals, the technical solution adopted by the present invention is：Drier controlling method：
Step 1, dryer work；
Step 2 obtains the moisture value that cereal is oven-dried in warehouse for drying in real time；
Step 3 determines drying temperature, the bigger drying temperature of difference according to real-time moisture value and target moisture value size of the difference
It is higher；
Step 4, the in real time temperature value in acquisition warehouse for drying；
Whether step 5, judgement real-time temperature values meet or exceed the drying temperature determined in step 3；
Step 6, if so, close two sections of fire of combustor, if it is not, then opening two sections of fire of combustor；
Step 7, return to step 2.
The step 3 is by real-time moisture value and target moisture value difference and preset threshold value comparison, if difference is more than or waits
Then it is determined as high temperature drying in predetermined threshold value, if difference is less than predetermined threshold value, it is determined that be low temperature drying.
After step 1, following steps are also carried out：The target moisture value and described preset is set according to grain species
Threshold value.
It is the guarantor for reducing combustor output power and being maintained at low-power output that two sections of fire of combustor are closed in the step 6
Two sections of fire of combustor are closed in temperature state or the step 6 to close combustor；
It is maximum power output that described opening two sections of fire of combustor, which are holding combustor,.
Controller based on the drier controlling method described in claim, it is characterised in that：The controller includes letter
Number receiving module, signal processing module, signal output module；
The signal receiving module obtains the real-time moisture value and real-time temperature values for being oven-dried cereal in real time；
The signal processing module is worth to control signal according to the real-time moisture value and real time temperature；
Signal is controlled described in the signal output module to the combustor of dryer；
The combustor enters different working conditions according to the control signal.
The signal processing module includes comparison module, and the comparison module is by the real-time moisture value and target moisture value
Difference be compared with preset threshold value；
It is dried if the difference is determined as high temperature more than or equal to the preset threshold value；
If the difference is determined as low temperature drying less than the preset threshold value.
The signal processing module further includes judgment module, and whether the judgment module judgement real-time temperature values reach or surpass
Cross determining drying temperature；If so, two sections of fire of combustor are closed, if it is not, then opening two sections of fire of combustor.
The controller is equipped with touch screen, and the target moisture value and institute are set by the touch screen according to grain species
State preset threshold value.
A kind of dryer control system using the controller, system are equipped with controller, and the controller receives peace
The temperature sensor and Moisture Meter put in the dryness storehouse of dryer acquire real-time moisture value and real-time temperature values, the controller
The combustor of dryer is output control signals to according to the real-time moisture value and real-time temperature values.
A kind of dryer, dryer include combustor and dryness storehouse, and the dryer is equipped with described in claim 8 or 9
Dryer control system.
The advantage of the invention is that realization dryer determines moisture drying course, pass through temperature control in drying course
System, can greatly improve drying efficiency and quality.
Description of the drawings
The content of width attached drawing expression every in description of the invention is briefly described below：
Fig. 1 is system block diagram；
Fig. 2 is system control process figure.
Specific embodiment
Drier controlling method of the present invention is as shown in Fig. 2, specific works method is as follows：
Step 1, dryer work；When the step performs, each device of dryer is started to work, when combustor is by one section
After fiery (combustor preheating) switchs to two sections of fire, next step is performed；
Step 2, the moisture value for obtaining current cereal in warehouse for drying in real time obtain moisture value and pass through Moisture Meter；
Step 3 determines drying temperature, the bigger drying temperature of difference according to real-time moisture value and target moisture value size of the difference
It is higher, in this way, forming the relationship between a linear drying temperature and moisture difference, more accurately cereal can be carried out
Drying, the moisture value of acquisition analyzed by (PLC controller), and according to the suitable drying temperature of preset procedure selection
(linear ratio to)；
Step 4, the in real time temperature value in acquisition warehouse for drying, obtain temperature value and pass through temperature sensor；
Whether step 5, judgement real-time temperature values meet or exceed the drying temperature determined in step 3；
Step 6, if so, close two sections of fire of combustor, if it is not, then opening two sections of fire of combustor；
Step 7, return to step 2.
In this way when the difference of practical moisture value distance objective moisture value is excessive, cereal surface layer is not destroyed in guarantee temperature
In the case of, temperature can improve as possible, be conducive to drying efficiency in this way；And when the difference of practical moisture value distance objective moisture value
When smaller, go to dry using low temperature, then can ensure dries quantity.
Embodiment scheme：For simplify control program, ensure the reliability of control method, as shown in Fig. 2, step 2 will be real
When moisture value and target moisture value difference and preset threshold value comparison, be determined as high temperature drying if difference is more than predetermined threshold value,
If difference is less than predetermined threshold value, it is determined that for low temperature drying, by a point value (predetermined threshold value), can facilitate and accurately will
Cereal carries out two-part drying, ensures dries quantity.
To improve the intelligent of control, drying temperature, target moisture value and preset threshold value are regulated and controled by input unit, tool
Body parameter can be adjusted according to drying product or season difference, so as to improve drying effect, furthermore it is also possible to several sets that prestore
Common drying parameter scheme, it is only necessary to the name of product of input this time drying, then it being capable of adjust automatically matching drying temperature, target
Moisture value and preset threshold value.
In addition, it is to reduce combustor output power and be maintained at what low-power exported that two sections of fire of combustor are closed in step 6
Two sections of fire of combustor are closed in keeping warm mode or the step 6 to close combustor；Two sections of fire of the opening combustor is protect
Combustor is held as maximum power output.This mainly sets according to the function of combustor.
Controller (preferably PLC controller) based on above-mentioned control method includes signal receiving module, signal output module
And signal processing module；Signal receiving module receives the output signal of temperature sensor and Moisture Meter；Signal output module exports
Signal is controlled to the combustor of dryer；Signal processing module obtains output to baking according to temperature sensor and the signal of Moisture Meter
The control signal of the combustor of dry machine.In addition, for convenience of input control parameter, current working condition is shown, signal receives mould
Block receives the command signal of touch screen, and signal output module exports vision signal to touch screen.
Signal processing module include comparison module, comparison module by the difference of the real-time moisture value and target moisture value with
Preset threshold value is compared；It is dried if the difference is determined as high temperature more than or equal to the preset threshold value；If the difference
Value is determined as low temperature drying less than the preset threshold value.Signal processing module further includes judgment module, and the judgment module is sentenced
Determine whether real-time temperature values meet or exceed the drying temperature determined in step 3；If so, two sections of fire of combustor are closed, if it is not,
Then open two sections of fire of combustor.
Dryer control system is as shown in Figure 1, system includes controller, temperature sensor, Moisture Meter, combustor and touch-control
Screen, the preferred PLC controller of controller, PLC controller is the control core of system, for storing, handling data, temperature sensor
It is mounted in warehouse for drying with Moisture Meter, acquires the moisture value and temperature value of material drying, and the numerical signal acquired is delivered to PLC
Controller, PLC controller work according to above-mentioned drier controlling method, output control signals to combustor, touch screen and PLC
Controller connects, and can show the information such as parameter, the working condition of PLC controller, can also be used as input unit, facilitate work people
Member's output control command.
A kind of dryer, dryer are preferably grain drying machine, and dryer includes combustor and dryness storehouse, in the dryer
Containing control system as shown in Figure 1, control system performs operation according to drier controlling method shown in Fig. 2.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that present invention specific implementation is not by aforesaid way
Limitation, as long as employ the inventive concept and technical scheme of the present invention progress various unsubstantialities improvement or without changing
Other occasions are directly applied to by the design of the present invention and technical solution, within protection scope of the present invention.
Claims (8)
1. drier controlling method, it is characterised in that：
Step 1, dryer work；
Step 2 obtains the moisture value that cereal is oven-dried in warehouse for drying in real time；
Step 3 determines drying temperature according to real-time moisture value and target moisture value size of the difference, and the bigger drying temperature of difference is more
It is high；
Step 4, the in real time temperature value in acquisition warehouse for drying；
Whether step 5, judgement real-time temperature values meet or exceed the drying temperature determined in step 3；
Step 6, if so, close two sections of fire of combustor, if it is not, then opening two sections of fire of combustor；
Step 7, return to step 2；
The step 3 is by real-time moisture value and target moisture value difference and preset threshold value comparison, if difference is greater than or equal in advance
If threshold value is then determined as high temperature drying, if difference is less than predetermined threshold value, it is determined that be low temperature drying;
It is the heat preservation shape for reducing combustor output power and being maintained at low-power output that two sections of fire of combustor are closed in the step 6
Two sections of fire of combustor are closed in state or the step 6 to close combustor；
It is maximum power output that described opening two sections of fire of combustor, which are holding combustor,.
2. drier controlling method according to claim 1, it is characterised in that：After step 1, it is also walked as follows
Suddenly：The target moisture value and the preset threshold value are set according to grain species.
3. the controller based on the drier controlling method described in claims 1 or 2, it is characterised in that：The controller includes
Signal receiving module, signal processing module, signal output module；
The signal receiving module obtains the real-time moisture value and real-time temperature values for being oven-dried cereal in real time；
The signal processing module is worth to control signal according to the real-time moisture value and real time temperature；
Signal is controlled described in the signal output module to the combustor of dryer；
The combustor enters different working conditions according to the control signal.
4. controller according to claim 3, it is characterised in that：The signal processing module includes comparison module, described
The difference of the real-time moisture value and target moisture value and preset threshold value are compared by comparison module；
It is dried if the difference is determined as high temperature more than or equal to the preset threshold value；
If the difference is determined as low temperature drying less than the preset threshold value.
5. the controller according to right wants 3 or 4, it is characterised in that：The signal processing module further includes judgment module, institute
State whether judgment module judgement real-time temperature values meet or exceed determining drying temperature；If so, two sections of fire of combustor are closed,
If it is not, then open two sections of fire of combustor.
6. controller according to claim 3 or 4, it is characterised in that：The controller is equipped with touch screen, according to cereal kind
Class sets the target moisture value and the preset threshold value by the touch screen.
7. a kind of dryer control system of controller using described in claim 3 or 4 or 5, it is characterised in that：System is equipped with
Controller, the temperature sensor and Moisture Meter that the controller reception is placed in the dryness storehouse of dryer acquire real-time moisture value
And real-time temperature values, the controller output control signals to the combustion of dryer according to the real-time moisture value and real-time temperature values
Burning machine.
8. a kind of dryer, dryer includes combustor and dryness storehouse, it is characterised in that：The dryer is equipped with claim 7
The dryer control system.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108489255B (en) * | 2016-08-12 | 2020-04-14 | 福建省南安市海特机械有限公司 | Biomass drying equipment capable of recovering heat energy |
| CN106962473A (en) * | 2017-03-02 | 2017-07-21 | 安徽广深机电设备有限公司 | A kind of multistage crop dryer unit automatic control system |
| CN112179111A (en) * | 2020-09-01 | 2021-01-05 | 安德里茨（中国）有限公司 | Dryer control method, dryer control device, dryer control equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SE505655C2 (en) * | 1994-02-11 | 1997-09-29 | Flaekt Ab | Process for drying wood |
| CN102345970A (en) * | 2011-08-31 | 2012-02-08 | 江苏峰业电力环保集团有限公司 | Denitration catalyst drying apparatus |
| CN103017485B (en) * | 2011-09-24 | 2016-11-02 | 潘成锋 | A kind of timber hot and humid rapid draing process |
| CN102506568A (en) * | 2011-10-08 | 2012-06-20 | 四川省星达包装设备制造有限公司 | Vertical inverted trapezoidal energy-saving oven with double working area |
| CN103307867B (en) * | 2012-03-06 | 2015-06-24 | 江苏天地化纤有限公司 | Uniform drying process of chemical fiber slices |
| CN102650496A (en) * | 2012-06-05 | 2012-08-29 | 苏州市金翔钛设备有限公司 | Automatic control system of multifunctional drying machine |
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Address after: 241080 16 e - Xi Road, San Shan Economic Development Zone, Wuhu, Anhui Patentee after: Zhonglian Agricultural Machinery Co., Ltd Address before: 241080, No. 16, Wuhu Road, three mountain Economic Development Zone, three mountain area, Anhui, China Patentee before: ZOOMLION HEAVY MACHINERY Co.,Ltd. |
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