CN105157407A - Dryer control method and control system thereof - Google Patents
Dryer control method and control system thereof Download PDFInfo
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- CN105157407A CN105157407A CN201510701898.XA CN201510701898A CN105157407A CN 105157407 A CN105157407 A CN 105157407A CN 201510701898 A CN201510701898 A CN 201510701898A CN 105157407 A CN105157407 A CN 105157407A
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Abstract
The invention discloses a dryer control method. According to the method, a first-stage variable temperature, a second-stage variable temperature, parameters for control and a target moisture difference value can be set and transmitted to a PLC in real time; the PLC receives values of a temperature sensor and a moisture instrument in real time, acquires a current temperature and a grain moisture value and controls a heat source combustion engine and second-stage fire through logic. By means of the dryer control method and a control system thereof, the constant moisture drying process of a drier is achieved, and by means of the variable temperature control in the drying process, the drying efficiency and quality can be greatly improved.
Description
Technical field
The present invention relates to dryer field, particularly relate to the alternating temperature control system of grain drying machine.
Background technology
Temperature is the principal element affecting grain-drying process, the height of temperature directly affects grain-drying efficiency and quality, and moisture is the final control object of drying, the final effect of oven dry ensures certain oven dry moisture, dries moisture and ensure by controlling bake out temperature.
But existing dryer product is all carry out thermostatic control, require that stationary temperature is the guarantee of dries quantity, though stationary temperature can ensure dries quantity, but be unfavorable for improving drying efficiency, thus cannot dries quantity be ensured, affect product quality.
Summary of the invention
Technical problem to be solved by this invention be realize a kind of can by the drier controlling method of variable temperature control and system in drying course.
To achieve these goals, the technical solution used in the present invention is: drier controlling method:
Step 1, dryer work;
The moisture value of cereal is dried in step 2, Real-time Obtaining warehouse for drying;
Step 3, according to Real-time Water score value and Target moisture value difference value size determination bake out temperature, the larger bake out temperature of difference is higher;
Temperature value in step 4, Real-time Obtaining warehouse for drying;
Whether step 5, judgement real-time temperature values meet or exceed the bake out temperature determined in step 3;
Step 6, if so, then close combustor two sections of fire, if not, then open combustor two sections of fire;
Step 7, return step 2.
Real-time Water score value compares with the threshold value preset with Target moisture value difference value by described step 3, if difference is more than or equal to predetermined threshold value, is defined as hyperthermia drying, if difference is less than predetermined threshold value, is then defined as low temperature drying.
After step 1, also following steps are carried out: set described target water score value and described default threshold value according to grain species.
Closing combustor two sections of fire in described step 6 is the keeping warm mode reducing combustor power output and remain on low-power output, or closes combustor two sections of fire in described step 6 for closing combustor;
Described combustor two sections of fire of opening are for keeping combustor to be maximum power output.
Based on the controller of the drier controlling method described in claim, it is characterized in that: described controller comprises signal receiving module, signal processing module, signal output module;
Described signal receiving module Real-time Obtaining is dried the Real-time Water score value of cereal and real-time temperature values;
Described signal processing module obtains control signal according to described Real-time Water score value and real-time temperature values;
The combustor of dryer is controlled signal to described in described signal output module;
Described combustor enters different duties according to described control signal.
Described signal processing module comprises comparison module, and the difference of described Real-time Water score value and target water score value compares with the threshold value preset by described comparison module;
If described difference is more than or equal to described default threshold value be defined as hyperthermia drying;
If described difference is less than described default threshold value be defined as low temperature drying.
Described signal processing module also comprises judge module, and described judge module judges whether real-time temperature values meets or exceeds the bake out temperature determined; If so, then close combustor two sections of fire, if not, then open combustor two sections of fire.
Described controller is provided with touch-screen, sets described target water score value and described default threshold value according to grain species by described touch-screen.
A kind of dryer control system using described controller, system is provided with controller, described controller receives the temperature sensor and Moisture Meter collection Real-time Water score value and real-time temperature values that are placed in the dryness storehouse of dryer, and described controller outputs control signals to the combustor of dryer according to described Real-time Water score value and real-time temperature values.
A kind of dryer, dryer comprises combustor and dryness storehouse, and described dryer is provided with the dryer control system described in claim 8 or 9.
The invention has the advantages that realize dryer determine moisture drying course, by variable temperature control in drying course, can greatly improve drying efficiency and quality.
Accompanying drawing explanation
Below the content that width accompanying drawing every in description of the present invention is expressed is briefly described:
Fig. 1 is system block diagram;
Fig. 2 is system control process figure.
Detailed description of the invention
As shown in Figure 2, specific works method is as follows for drier controlling method of the present invention:
Step 1, dryer work; When this step performs, each device of dryer is started working, and after combustor transfers two sections of fire to by one section of fire (combustor preheating), performs next step;
The moisture value of current cereal in step 2, Real-time Obtaining warehouse for drying, obtains moisture value and passes through Moisture Meter;
Step 3, according to Real-time Water score value and Target moisture value difference value size determination bake out temperature, the larger bake out temperature of difference is higher, like this, form the relation between a linear bake out temperature and moisture difference, more accurate cereal can be dried, the moisture value obtained is analyzed by (PLC), and according to the suitable bake out temperature of the procedure Selection preset (linear ratio to);
Temperature value in step 4, Real-time Obtaining warehouse for drying, obtains temperature value and passes through temperature sensor;
Whether step 5, judgement real-time temperature values meet or exceed the bake out temperature determined in step 3;
Step 6, if so, then close combustor two sections of fire, if not, then open combustor two sections of fire;
Step 7, return step 2.
Like this when the difference of actual moisture value distance objective moisture value is excessive, when ensureing that temperature does not destroy cereal top layer, temperature can improve as far as possible, is conducive to drying efficiency like this; And when the difference of actual moisture value distance objective moisture value is less, adopt low temperature to go to dry, then can ensure dries quantity.
Embodiment scheme: in order to simplify control program, ensure the reliability of control method, as shown in Figure 2, Real-time Water score value compares with the threshold value preset with Target moisture value difference value by step 2, if difference is greater than predetermined threshold value, is defined as hyperthermia drying, if difference is less than predetermined threshold value, then be defined as low temperature drying, by a point value (predetermined threshold value), can facilitate and accurately cereal be carried out two-part oven dry, ensureing dries quantity.
For improving the intelligent of control, bake out temperature, target water score value and default threshold value regulate and control by input block, design parameter can according to oven dry product or season difference adjust, thus raising drying effect, in addition, drying parameter scheme commonly used by a few cover that can also prestore, and only needs the name of product that input is this time dried, then automatically can adjust coupling bake out temperature, target water score value and default threshold value.
In addition, closing combustor two sections of fire in step 6 is the keeping warm mode reducing combustor power output and remain on low-power output, or closes combustor two sections of fire in described step 6 for closing combustor; Described combustor two sections of fire of opening are for keeping combustor to be maximum power output.This is mainly according to the function setting of combustor.
Controller (preferred PLC) based on above-mentioned control method comprises 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 outputs control signals to the combustor of dryer; Signal processing module exports the control signal of the combustor of dryer to according to the signal acquisition of temperature sensor and Moisture Meter.In addition, for convenience of input control parameter, show current duty, signal receiving module receives the command signal of touch-screen, and signal output module output video signal is to touch-screen.
Signal processing module comprises comparison module, and the difference of described Real-time Water score value and target water score value compares with the threshold value preset by comparison module; If described difference is more than or equal to described default threshold value be defined as hyperthermia drying; If described difference is less than described default threshold value be defined as low temperature drying.Signal processing module also comprises judge module, and described judge module judges whether real-time temperature values meets or exceeds the bake out temperature determined in step 3; If so, then close combustor two sections of fire, if not, then open combustor two sections of fire.
Dryer control system as shown in Figure 1, system comprises controller, temperature sensor, Moisture Meter, combustor and touch screen, the preferred PLC of controller, PLC is the control core of system, for storing, process data, temperature sensor and Moisture Meter are arranged in warehouse for drying, gather moisture value and the temperature value of material drying, and the numerical signal gathered is delivered to PLC, PLC is according to above-mentioned drier controlling method work, output control signals to combustor, touch screen is connected with PLC, the parameter of PLC can be shown, the information such as duty, also can as input block, staff is facilitated to export control command.
A kind of dryer, dryer is preferably grain drying machine, and dryer comprises combustor and dryness storehouse, and containing, for example the control system shown in Fig. 1 in this dryer, control system is according to the drier controlling method executable operations shown in Fig. 2.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention without to improve.
Claims (10)
1. drier controlling method, is characterized in that:
Step 1, dryer work;
The moisture value of cereal is dried in step 2, Real-time Obtaining warehouse for drying;
Step 3, according to Real-time Water score value and Target moisture value difference value size determination bake out temperature, the larger bake out temperature of difference is higher;
Temperature value in step 4, Real-time Obtaining warehouse for drying;
Whether step 5, judgement real-time temperature values meet or exceed the bake out temperature determined in step 3;
Step 6, if so, then close combustor two sections of fire, if not, then open combustor two sections of fire;
Step 7, return step 2.
2. drier controlling method according to claim 1, it is characterized in that: Real-time Water score value compares with the threshold value preset with Target moisture value difference value by described step 3, if difference is more than or equal to predetermined threshold value, be defined as hyperthermia drying, if difference is less than predetermined threshold value, be then defined as low temperature drying.
3. drier controlling method according to claim 2, is characterized in that: after step 1, also carries out following steps: set described target water score value and described default threshold value according to grain species.
4. drier controlling method according to claim 1 and 2, it is characterized in that: closing combustor two sections of fire in described step 6 is the keeping warm mode reducing combustor power output and remain on low-power output, or close combustor two sections of fire in described step 6 for closing combustor;
Described combustor two sections of fire of opening are for keeping combustor to be maximum power output.
5. based on the controller of the drier controlling method according to any one of claim 1-4, it is characterized in that: described controller comprises signal receiving module, signal processing module, signal output module;
Described signal receiving module Real-time Obtaining is dried the Real-time Water score value of cereal and real-time temperature values;
Described signal processing module obtains control signal according to described Real-time Water score value and real-time temperature values;
The combustor of dryer is controlled signal to described in described signal output module;
Described combustor enters different duties according to described control signal.
6. want the controller described in 5 according to right, it is characterized in that: described signal processing module comprises comparison module, the difference of described Real-time Water score value and target water score value compares with the threshold value preset by described comparison module;
If described difference is more than or equal to described default threshold value be defined as hyperthermia drying;
If described difference is less than described default threshold value be defined as low temperature drying.
7. want the controller described in 5 or 6 according to right, it is characterized in that: described signal processing module also comprises judge module, described judge module judges whether real-time temperature values meets or exceeds the bake out temperature determined; If so, then close combustor two sections of fire, if not, then open combustor two sections of fire.
8. the controller according to claim 5 or 6, is characterized in that: described controller is provided with touch-screen, sets described target water score value and described default threshold value according to grain species by described touch-screen.
9. one kind uses the dryer control system of claim 5 or the controller described in 6 or 7, it is characterized in that: system is provided with controller, described controller receives the temperature sensor and Moisture Meter collection Real-time Water score value and real-time temperature values that are placed in the dryness storehouse of dryer, and described controller outputs control signals to the combustor of dryer according to described Real-time Water score value and real-time temperature values.
10. a dryer, dryer comprises combustor and dryness storehouse, it is characterized in that: described dryer is provided with the dryer control system described in claim 8 or 9.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN108489255A (en) * | 2016-08-12 | 2018-09-04 | 福建省南安市海特机械有限公司 | A kind of biomass drying equipment of recycling thermal energy |
| 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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| 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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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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