CN105941616A - Vacuum grain dryer and drying method - Google Patents
Vacuum grain dryer and drying method Download PDFInfo
- Publication number
- CN105941616A CN105941616A CN201610555819.3A CN201610555819A CN105941616A CN 105941616 A CN105941616 A CN 105941616A CN 201610555819 A CN201610555819 A CN 201610555819A CN 105941616 A CN105941616 A CN 105941616A
- Authority
- CN
- China
- Prior art keywords
- drying
- vacuum
- warehouse
- grain
- hot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001035 drying Methods 0.000 title claims abstract description 207
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 17
- 238000007599 discharging Methods 0.000 claims description 10
- 238000001291 vacuum drying Methods 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000010981 drying operation Methods 0.000 description 2
- 238000003306 harvesting Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
- A23B9/00—Preservation of edible seeds, e.g. cereals
- A23B9/08—Drying; Subsequent reconstitution
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/85—Food storage or conservation, e.g. cooling or drying
Abstract
The invention discloses a vacuum grain dryer and a drying method. The vacuum grain dryer comprises a drying bin, an air heater and a vacuum machine, wherein the space inside the drying bin is used for drying grains, the air heater is connected to one side of the drying bin and used for providing hot drying air for the drying bin, and the vacuum machine is connected to the other side of the drying bin and used for adjusting the vacuum degree in the drying bin. When the vacuum machine is turned on, the drying bin is shut off and the air heater is turned off until the vacuum degree in the drying bin reaches the lower limit value; after a while, the vacuum machine is turned off and the drying bin is shut off, the air heater is turned on, the vacuum machine is turned on again when the vacuum degree reaches the upper limit value, and thus a drying circulation process is completed. Under the condition that energy consumption is basically the same, the drying speed of the vacuum grain dryer can be increased by 30% averagely compared with that of an existing dryer.
Description
Technical field
The present invention relates to grain heat-drying field.It is more particularly related to a kind of vacuum grain heat-drying
Machine and furnace drying method.
Background technology
Grain harvest post-drying is the important step during grain processing, and existing drying plant dries effect
Rate is relatively low, and drying rate is slow.Because can not flash baking in time send out after having substantial amounts of grain harvest every year
Mildew after change, particularly south China summer grain crops are gathered in the crops and be exactly rainy season, must if can not dry in time
The biggest economic loss will be caused to vast farmers and grain processing enterprise.
Summary of the invention
It is an object of the present invention to provide a kind of foodstuff drying device, in warehouse for drying, input hot blast with hot-air blower, and
With vacuum machine to warehouse for drying evacuation, make warehouse for drying dry under vacuo, improve drying efficiency.
It is a still further object of the present invention to provide a kind of foodstuff drying device, use control module regulation hot-air blower
With the air quantity of vacuum machine, improve drying efficiency.
It is a still further object of the present invention to provide the furnace drying method of a kind of foodstuff drying device, use cyclic drying
Method is dried, it is to avoid excessively dry.
It is a still further object of the present invention to provide the furnace drying method of a kind of foodstuff drying device, use fuzzy control
The technological coefficients such as vacuum drying time, vacuum higher limit and the lower limit of cyclic drying process are carried out by device
Adjust, improve and dry control accuracy, it is to avoid excessively dry.
In order to realize according to object of the present invention and further advantage, it is provided that a kind of vacuum grain heat-drying
Machine, including:
Warehouse for drying, in it, space is used for drying grain；
Hot-air blower, it is connected to warehouse for drying side, dries hot blast for providing to warehouse for drying；
Vacuum machine, it is connected to described warehouse for drying opposite side, is used for regulating vacuum in warehouse for drying；
Wherein, when vacuum machine is opened, close warehouse for drying and hot-air blower until degree of hollowness reaches in warehouse for drying
Lower limit；Through after a period of time, close vacuum machine and warehouse for drying, open hot-air blower, when vacuum reaches
During to higher limit, then open vacuum machine, complete a drying cycle process.
Preferably, described warehouse for drying also includes:
Charging aperture, it connects into grain conveyer, and described charging aperture is used for importing grain to warehouse for drying；
Discharging opening, it connects arranges grain conveyer, and described discharging opening is used for discharging grain in warehouse for drying.
Preferably, described warehouse for drying also includes:
Vacuum pipe, its one end is fixed on warehouse for drying, and the other end connects described vacuum machine；
Hot air duct, its one end is fixed on warehouse for drying, and the other end connects described hot-air blower.
Preferably, also include:
First Temperature Humidity Sensor, it is arranged on vacuum pipe, for detecting the drying that warehouse for drying is discharged
The temperature and humidity of medium；
Second Temperature Humidity Sensor, it is arranged on hot air duct, for detecting dry Jie entering warehouse for drying
The temperature and humidity of matter；
Moisture detector, it connects described warehouse for drying, is used for detecting grain moisture content value in warehouse for drying.
Preferably, also include:
Control module, its connect warehouse for drying, hot-air blower, vacuum machine, the first Temperature Humidity Sensor, second
Temperature Humidity Sensor and moisture detector, described control module receives the first Temperature Humidity Sensor, the second temperature
Humidity sensor and the data of moisture detector also process, and regulate the air quantity of hot-air blower and vacuum machine.
The purpose of the present invention realizes also by the furnace drying method of a kind of vacuum foodstuff drying device, including following
Step:
Step 1, close warehouse for drying and hot-air blower, open vacuum machine evacuation until vacuum in warehouse for drying
Reach lower limitWherein, the temperature drying medium that the first Temperature Humidity Sensor detection warehouse for drying is discharged
T1' and humidity H1′；
Step 2, through t1After the vacuum drying of time, close vacuum machine and warehouse for drying, open hot-air blower and make
In warehouse for drying, vacuum reaches higher limit P1 max, wherein, in vacuum drying process, the second humiture passes
Sensor detection enters temperature T of the dry medium of warehouse for drying1With humidity H1, moisture detector detection warehouse for drying
Interior grain moisture content value W1, now complete a drying cycle process；
Step 3, when in i-th drying course moisture detector detection moisture value WiEqual to Target moisture value,
Stop drying.
Preferably, also include:
In control module, fuzzy controller gathers grain moisture content value W of i-th drying coursei, preferable grain water
Score value
The preferable grain moisture content value of inputWith grain moisture content value WiDeviation e and deviation variation rate ec, described mould
Fuzzy controllers large deviations and deviation variation rate are divided into 7 grades；
The affix limit value of the vacuum of output i+1 drying courseAdditional lower limitWith
Addition of vacuum degree Time constant Δ ti+1, output is divided into 7 grades；
The fuzzy set of input and output is { NB, NM, NS, 0, PS, PM, PB}.
Preferably, fuzzy control rule is:
When preferable grain moisture content valueWith grain moisture content value Wt1Deviation e less than zero, addition of vacuum degree is constant
Time Δ ti+1For no more than zero, vacuum affix limit valueFor negative, additional lower limitFor just；
When preferable grain moisture content valueWith grain moisture content value Wt1Deviation e more than zero, addition of vacuum degree is constant
Time Δ ti+1Not less than zero, vacuum affix limit valueFor just, additional lower limitIt is negative.
Preferably, the fuzzy domain of described deviation e and deviation variation rate ec is [-4,4], for [-9,9], defeated
The affix limit value of the vacuum gone outDomain be [-20,20], additional lower limitDomain be
[-20,20] and addition of vacuum degree Time constant Δ ti+1Domain be [-3,3].
Preferably, input deviation e and deviation variation rate ec, the vacuum of output in described fuzzy controller
The affix limit value of degreeAdditional lower limitWith addition of vacuum degree Time constant Δ ti+1All use three
Dihedral membership function.
The present invention at least includes following beneficial effect: 1, the vacuum foodstuff drying device of the present invention is basic in energy consumption
In the case of identical, drying rate can averagely improve 30% than existing dehydrator；2, the baking of the present invention
Drying method uses fuzzy control, improves and dries the precision controlled, prevents the grain gelatinizing that too fast drying causes
Degree is big, excessively dry the energy consumption issues caused slowly.
Part is embodied by the further advantage of the present invention, target and feature by description below, and part also will
By the research of the present invention and practice are understood by the person skilled in the art.
Accompanying drawing explanation
Fig. 1 is the structural representation of the vacuum foodstuff drying device of the present invention.
Fig. 2 is the control module connection diagram of the vacuum foodstuff drying device of the present invention.
Fig. 3 is preferable grain moisture content valueWith grain moisture content value WiThe triangular membership figure of deviation e.
Fig. 4 is preferable grain moisture content valueWith grain moisture content value WiThe triangle of deviation variation rate ec be subordinate to
Functional arrangement.
Fig. 5 is the affix limit value of vacuumTriangular membership figure.
Fig. 6 is the additional lower limit of vacuumTriangular membership figure.
Fig. 7 is addition of vacuum degree Time constant Δ ti+1Triangular membership figure.
Detailed description of the invention
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art's reference
Description word can be implemented according to this.
Should be appreciated that used herein such as " have ", " comprising " and " including " term not
Allot other element one or more or the existence of a combination thereof or interpolation.
Fig. 1-2 shows that a kind of way of realization according to the present invention, a kind of vacuum foodstuff drying device include drying
Dry storehouse 110, hot-air blower 120 and vacuum machine 130, as it is shown in figure 1, warehouse for drying 110 is tower warehouse for drying,
Its lower end is liftoff and is fixed on the ground by support；Wherein, described warehouse for drying 110 may be designed as square
The warehouse for drying forms such as shape, pinnacle type.Described warehouse for drying 110 inner hollow, in it, accommodation space is used for putting
Put grain and carry out drying operation.Warehouse for drying 110 includes: charging aperture 111, discharging opening 112, vacuum tube
Road 113 and hot air duct 114, wherein, charging aperture 111 is arranged on the top of warehouse for drying 110, and it connects
Enter grain conveyer, for inputting grain to be dried in warehouse for drying 110.Discharging opening 112 is arranged on drying
The bottom in storehouse 110, it connects row's grain conveyer, dries, in being used for discharging warehouse for drying 110, food of paying the grain tax.Very
Vacant duct 113 is arranged on the side of warehouse for drying 110 and near charging aperture 111, described vacuum pipe 113
The other end connects described vacuum machine 130；Hot air duct 114 is arranged on the opposite side of warehouse for drying 110 close
Discharging opening 112, the other end of described hot air duct 114 connects described hot-air blower 120.In hot-air blower 120
Portion has heater strip, dries medium and enters from the air inlet of hot-air blower 120, is preheated to therein
Dry temperature, pump into warehouse for drying 110, described hot-air blower 120 with gas pump in it through hot air duct 114
Hot blast is dried for providing to warehouse for drying 110.Vacuum machine 130 is vacuum pump, and it connects described warehouse for drying
The vacuum pipe 113 of 110, in making warehouse for drying 110 by its evacuation operation, vacuum reaches setting value.
Wherein, when vacuum machine 130 is opened, closing warehouse for drying 110 and hot-air blower 120, vacuum machine 130 will
Hot blast is extracted out from warehouse for drying 110 upper end, until degree of hollowness reaches lower limit in warehouse for drying 110；Carry out true
Empty drying operation, makes grain and hot blast carry out being fully contacted and carrying out mass transfer and heat transfer, makes moisture in grain
Enter hot blast and improve grain temperature and be beneficial to moisture diffusion to outside, after vacuum drying operation after a while,
Close vacuum machine 130 and warehouse for drying 110, open hot-air blower 120 and make hot blast enter warehouse for drying 110 from bottom
In, make vacuum reach higher limit, then open vacuum machine, now complete a drying cycle process.
In another embodiment, the most described drying unit also includes sensor group, sensor group
Including the first Temperature Humidity Sensor, the second Temperature Humidity Sensor and moisture detector.First temperature and humidity sensing
Device is arranged in vacuum pipe 113, dries the temperature of medium and wet for detect that warehouse for drying 110 discharges
Degree, described first Temperature Humidity Sensor is high-acruracy survey module, have that volume is little, measure accurately etc. excellent
Point.Second Temperature Humidity Sensor is arranged in hot air duct 114, enters warehouse for drying 110 for detecting
It is dried the temperature and humidity of medium；Moisture detector connects described warehouse for drying 110, and warehouse for drying 110 is by grain
Separated in time enters moisture detector, and moisture detector utilizes the capacitive sensing probe detection grain that it is interior
Drinking water sub-signal, and it is converted into moisture after being processed by amplifying circuit, the grain that will detect afterwards
It is back to warehouse for drying 110.
In another embodiment, as in figure 2 it is shown, dehydrator also includes: control module, it connects drying
Storehouse 110, hot-air blower 120, vacuum machine 130 and sensor group, described control module receives the first humiture
Sensor, the second Temperature Humidity Sensor and the data of moisture detector also process, and regulate hot-air blower
Air quantity with vacuum machine.
Dehydrator as illustrated in fig. 1 and 2 uses grain upper entering and lower leaving, the drying pattern of hot blast bottom in and top out,
Workflow is: with entering grain conveyer, from charging aperture 111, drying grain is inputted warehouse for drying 110, opens
Vacuum machine 130, close warehouse for drying 110 and hot-air blower 120, vacuum machine 130 by hot blast from warehouse for drying 110
Upper end is extracted out, until degree of hollowness reaches lower limit in warehouse for drying 110；Carry out vacuum drying operation, make grain
Food and hot blast carry out being fully contacted and carrying out mass transfer and heat transfer, through after a period of time, close vacuum machine 130
With warehouse for drying 110, open hot-air blower 120 and make hot blast enter in warehouse for drying 110 from bottom, make vacuum reach
To higher limit, then open vacuum machine, now complete a drying cycle process, in drying course, use
The temperature and humidity drying medium that first Temperature Humidity Sensor detection warehouse for drying 110 is discharged, second is warm and humid
Degree sensor detection enters the temperature and humidity of the dry medium of warehouse for drying 110, and moisture detector detection is dried
The moisture of the grain in dry storehouse 110, and send data to control module, control module adjusts heat
Blower fan and the air quantity of vacuum machine, accelerate drying course, when carrying out to i-th drying course, drying detected
In storehouse 110, the moisture of grain is equal to the target moisture content set, and control module controls dehydrator and stops
Only dry operation.
A kind of furnace drying method of vacuum foodstuff drying device, including:
In dehydrator input quality be M, moisture value be H0Grain, and to control module input dry
Target moisture value.
Step 1, close warehouse for drying and hot-air blower, open vacuum machine evacuation until vacuum in warehouse for drying
Reach lower limitWherein, the temperature drying medium that the first Temperature Humidity Sensor detection warehouse for drying is discharged
T1' and humidity H1', by constant for vacuum at lower limitThrough t1After the vacuum drying of time, close vacuum
Machine and warehouse for drying, open vacuum in hot-air blower makes warehouse for drying and reach higher limit P1 max, wherein, in vacuum
In drying course, the second Temperature Humidity Sensor detection enters temperature T of the dry medium of warehouse for drying1And humidity
H1, moisture detector detection warehouse for drying in grain moisture content value W1, now complete first drying course；This
Time by the preferable grain moisture content value of first drying courseGrain moisture content value with moisture detector detection
W1Compare, equal, dry with present technique next time, if, then adjust next time
The technique dried；
Step 2, drying cycle process fuzzy controller regulate and control stoving process, and fuzzy controller respectively will
Preferable grain moisture content valueWith grain moisture content value WiDeviation e and deviation variation rate ec input fuzzy controller,
The affix limit value of the vacuum of output i+1 drying courseAdditional lower limitWith additional
Vacuum Time constant Δ ti+1, the technique next time dried is adjusted.
Fuzzy controller uses heterarchical architecture, including signal processing layer and Decision Control layer, particularly as follows:
Signal processing layer:
In i-th drying course, fuzzy controller gathers grain moisture content value W of moisture detector detectioni,
And according to the preferable grain moisture content value of MaterialBalance Computation
Wherein, G is the oven dry weight entering the grain in warehouse for drying, i.e. removes the grain after whole moisture
Weight, KG；QiThe hot blast rate of warehouse for drying, kg/s is entered for i-th drying course；Wi-1It is the i-th-1
The moisture of grain, % after drying course；tiFor the vacuum drying time of i-th drying course, s；Ht′i
For the humidity of the dry medium that vacuum machine in i-th drying course is discharged, %；HtiFor i-th drying course
Middle hot-air blower enters the humidity of the dry medium of warehouse for drying, %.
Decision Control layer:
The preferable grain moisture content value of fuzzy controller input i-th drying courseWith grain moisture content value Wi's
Deviation e, deviation variation rate ec, the affix limit value of the vacuum of output i+1 drying course
Additional lower limitWith addition of vacuum degree Time constant Δ ti+1；When without controlling, preferable grain moisture content value
With grain moisture content value WiThe excursion of deviation e be [-4,4], deviation variation rate ec is [-9,9], set amount
Changing the factor is 1, and therefore its fuzzy domain is [-4,4], [-9,9], the affix limit value of the vacuum of output
Domain be [-20,20], additional lower limitDomain be [-20,20] and addition of vacuum degree Time constant
Δti+1Domain be [-3,3].In order to ensure control precision so that it is under various operating modes can well with
Track control, according to repetition test, input the most at last and output be divided into 7 grades, fuzzy set be NB,
NM, NS, 0, PS, PM, PB}；Membership function all selects triangular membership, such as Fig. 3-7 institute
Show.
Fuzzy control rule chooses experience:
When preferable grain moisture content valueWith grain moisture content value Wt1Deviation e less than zero, addition of vacuum degree is constant
Time Δ ti+1For no more than zero, vacuum affix limit valueFor negative, additional lower limitFor just；
When preferable grain moisture content valueWith grain moisture content value Wt1Deviation e more than zero, addition of vacuum degree is constant
Time Δ ti+1Not less than zero, vacuum affix limit valueFor just, additional lower limitIt is negative；
Addition of vacuum degree Time constant Δ ti+1Fuzzy control rule as shown in table 1, the additional upper limit of vacuum
ValueFuzzy control rule is as shown in table 2, the additional lower limit of vacuumFuzzy control rule
As shown in table 3.
Table one addition of vacuum degree Time constant Δ ti+1Fuzzy control rule
Table two vacuum affix limit valueFuzzy control rule
The additional lower limit of table three vacuumFuzzy control rule
Step 3, fuzzy controller are according to output addition of vacuum degree Time constant Δ ti+1, the additional upper limit of vacuum
ValueAdditional lower limitControl module controls the technological parameter of i+1 drying course:
Vacuum Time constant ti+1=ti+Δti+1；
Vacuum higher limitFor:
Vacuum lower limitFor:
Make the preferable grain moisture content value that i+1 is driedWith grain moisture content value Wi+1Deviation e reduce,
Make that drying course controls is more accurate, and the grain gelatinization degree preventing too fast drying from causing is big, cross slow drying
The energy consumption issues caused.
Step 4, when detecting that grain moisture content value is equal with the grain moisture content value of setting, control module is stopped
Only dry operation.
Although embodiment of the present invention are disclosed as above, but it is not restricted to description and embodiment party
Listed utilization in formula.It can be applied to various applicable the field of the invention completely.For being familiar with ability
For the personnel in territory, it is easily achieved other amendment.Therefore without departing substantially from claim and etc. homotype
Enclosing under limited general concept, the present invention is not limited to specific details and shown here as the figure with description
Example.
Claims (10)
1. a vacuum foodstuff drying device, it is characterised in that including:
Warehouse for drying, in it, space is used for drying grain；
Hot-air blower, it is connected to warehouse for drying side, dries hot blast for providing to warehouse for drying；
Vacuum machine, it is connected to described warehouse for drying opposite side, is used for regulating vacuum in warehouse for drying；
Wherein, when vacuum machine is opened, close warehouse for drying and hot-air blower until degree of hollowness reaches in warehouse for drying
Lower limit；Through after a period of time, close vacuum machine and warehouse for drying, open hot-air blower, when vacuum reaches
During to higher limit, then open vacuum machine, complete a drying cycle process.
2. vacuum foodstuff drying device as claimed in claim 1, it is characterised in that described warehouse for drying also wraps
Include:
Charging aperture, it connects into grain conveyer, and described charging aperture is used for importing grain to warehouse for drying；
Discharging opening, it connects arranges grain conveyer, and described discharging opening is used for discharging grain in warehouse for drying.
3. vacuum foodstuff drying device as claimed in claim 1 or 2, it is characterised in that described warehouse for drying
Also include:
Vacuum pipe, its one end is fixed on warehouse for drying, and the other end connects described vacuum machine；
Hot air duct, its one end is fixed on warehouse for drying, and the other end connects described hot-air blower.
4. vacuum foodstuff drying device as claimed in claim 3, it is characterised in that also include:
First Temperature Humidity Sensor, it is arranged on vacuum pipe, for detecting the drying that warehouse for drying is discharged
The temperature and humidity of medium；
Second Temperature Humidity Sensor, it is arranged on hot air duct, for detecting dry Jie entering warehouse for drying
The temperature and humidity of matter；
Moisture detector, it connects described warehouse for drying, is used for detecting grain moisture content value in warehouse for drying.
5. vacuum foodstuff drying device as claimed in claim 3, it is characterised in that also include:
Control module, its connect warehouse for drying, hot-air blower, vacuum machine, the first Temperature Humidity Sensor, second
Temperature Humidity Sensor and moisture detector, described control module receives the first Temperature Humidity Sensor, the second temperature
Humidity sensor and the data of moisture detector also process, and regulate the air quantity of hot-air blower and vacuum machine.
6. the furnace drying method of a vacuum foodstuff drying device, it is characterised in that including:
Step 1, close warehouse for drying and hot-air blower, open vacuum machine evacuation until vacuum in warehouse for drying
Reach lower limitWherein, the temperature drying medium that the first Temperature Humidity Sensor detection warehouse for drying is discharged
T1' and humidity H '1；
Step 2, through t1After the vacuum drying of time, close vacuum machine and warehouse for drying, open hot-air blower and make
In warehouse for drying, vacuum reaches higher limit P1 max, wherein, in vacuum drying process, the second humiture passes
Sensor detection enters temperature T of the dry medium of warehouse for drying1With humidity H1, moisture detector detection warehouse for drying
Interior grain moisture content value W1, now complete a drying cycle process；
Step 3, when in i-th drying course moisture detector detection moisture value WiEqual to Target moisture value,
Stop drying.
7. the furnace drying method of vacuum foodstuff drying device as claimed in claim 6, it is characterised in that also wrap
Include:
In control module, fuzzy controller gathers grain moisture content value W of i-th drying coursei, preferable grain water
Score value
The preferable grain moisture content value of inputWith grain moisture content value WiDeviation e and deviation variation rate ec, described mould
Fuzzy controllers large deviations and deviation variation rate are divided into 7 grades；
The affix limit value of the vacuum of output i+1 drying courseAdditional lower limitWith
Addition of vacuum degree Time constant Δ ti+1, output is divided into 7 grades；
The fuzzy set of input and output is { NB, NM, NS, 0, PS, PM, PB}.
8. the furnace drying method of vacuum foodstuff drying device as claimed in claim 7, it is characterised in that fuzzy
Controlling rule is:
When preferable grain moisture content valueWith grain moisture content value Wt1Deviation e less than zero, addition of vacuum degree is constant
Time Δ ti+1For no more than zero, vacuum affix limit valueFor negative, additional lower limitFor just；
When preferable grain moisture content valueWith grain moisture content value Wt1Deviation e more than zero, addition of vacuum degree is constant
Time Δ ti+1Not less than zero, vacuum affix limit valueFor just, additional lower limitIt is negative.
9. the furnace drying method of vacuum foodstuff drying device as claimed in claim 8, it is characterised in that described
The fuzzy domain of deviation e and deviation variation rate ec is [-4,4], for [-9,9], the affix of the vacuum of output
Limit valueDomain be [-20,20], additional lower limitDomain be that [-20,20] and addition of vacuum degree are permanent
Fix time Δ ti+1Domain be [-3,3].
10. the furnace drying method of vacuum foodstuff drying device as claimed in claim 9, it is characterised in that institute
State the affix limit value of the vacuum of input deviation e and deviation variation rate ec, output in fuzzy controllerAdditional lower limitWith addition of vacuum degree Time constant Δ ti+1All use Triangleshape grade of membership function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610555819.3A CN105941616B (en) | 2016-07-14 | 2016-07-14 | Vacuum grain dryer and drying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610555819.3A CN105941616B (en) | 2016-07-14 | 2016-07-14 | Vacuum grain dryer and drying method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105941616A true CN105941616A (en) | 2016-09-21 |
| CN105941616B CN105941616B (en) | 2024-03-26 |
Family
ID=56900018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610555819.3A Active CN105941616B (en) | 2016-07-14 | 2016-07-14 | Vacuum grain dryer and drying method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105941616B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111854350A (en) * | 2020-07-15 | 2020-10-30 | 合肥三伍机械有限公司 | Circulating device for drying machine |
| CN114459209A (en) * | 2022-01-28 | 2022-05-10 | 福建省民爆化工股份有限公司 | Intelligent drying method and device for civil explosive chemical agent |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05322444A (en) * | 1992-05-22 | 1993-12-07 | Iseki & Co Ltd | Grain drying control method for grain dryer |
| CN201028935Y (en) * | 2007-04-04 | 2008-02-27 | 王泽元 | Heat-insulation low-temperature negative-pressure grain dryer |
| CN201133754Y (en) * | 2007-11-30 | 2008-10-15 | 巩义市予华仪器有限责任公司 | Vacuum checking drying cabinet |
| CN101485356A (en) * | 2009-02-11 | 2009-07-22 | 胡屹博 | Method for long term storage of grain without deterioration and equipment thereof |
| CN104336171A (en) * | 2013-08-05 | 2015-02-11 | 程长青 | Vacuum grain drying tower |
| CN104663877A (en) * | 2015-02-15 | 2015-06-03 | 安徽大洋自动化科技有限公司 | Intelligent grain drying control method |
| CN204705159U (en) * | 2015-05-29 | 2015-10-14 | 张家鑫 | Cereal vacuum circle-type drier |
| CN205993508U (en) * | 2016-07-14 | 2017-03-08 | 吉林省农业科学院 | A kind of vacuum foodstuff drying device |
-
2016
- 2016-07-14 CN CN201610555819.3A patent/CN105941616B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05322444A (en) * | 1992-05-22 | 1993-12-07 | Iseki & Co Ltd | Grain drying control method for grain dryer |
| CN201028935Y (en) * | 2007-04-04 | 2008-02-27 | 王泽元 | Heat-insulation low-temperature negative-pressure grain dryer |
| CN201133754Y (en) * | 2007-11-30 | 2008-10-15 | 巩义市予华仪器有限责任公司 | Vacuum checking drying cabinet |
| CN101485356A (en) * | 2009-02-11 | 2009-07-22 | 胡屹博 | Method for long term storage of grain without deterioration and equipment thereof |
| CN104336171A (en) * | 2013-08-05 | 2015-02-11 | 程长青 | Vacuum grain drying tower |
| CN104663877A (en) * | 2015-02-15 | 2015-06-03 | 安徽大洋自动化科技有限公司 | Intelligent grain drying control method |
| CN204705159U (en) * | 2015-05-29 | 2015-10-14 | 张家鑫 | Cereal vacuum circle-type drier |
| CN205993508U (en) * | 2016-07-14 | 2017-03-08 | 吉林省农业科学院 | A kind of vacuum foodstuff drying device |
Non-Patent Citations (2)
| Title |
|---|
| 李波: "木本中药材数控真空干燥机的设计研究", 《东北林业大学》 * |
| 李波: "木本中药材数控真空干燥机的设计研究", 《东北林业大学》, 28 April 2012 (2012-04-28), pages 4 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111854350A (en) * | 2020-07-15 | 2020-10-30 | 合肥三伍机械有限公司 | Circulating device for drying machine |
| CN114459209A (en) * | 2022-01-28 | 2022-05-10 | 福建省民爆化工股份有限公司 | Intelligent drying method and device for civil explosive chemical agent |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105941616B (en) | 2024-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107577257B (en) | A kind of investigating method that the grain based on temperature zone is continuous drying | |
| CN105104521B (en) | A kind of grain drier | |
| JP3208135U (en) | On-line measurement control method and system for circulated dry moisture based on total weight detection | |
| CN103202532B (en) | Method and system, based on moisture removing humidity, for controlling moisture at cut tobacco rotary drum drying outlet | |
| Zare et al. | Evaluation of a simulation model in predicting the drying parameters for deep-bed paddy drying | |
| CN209027199U (en) | A kind of negative pressure continuous drier | |
| CN205106216U (en) | Grain dryer | |
| CN105258493B (en) | Continuous type grain drying water online detection and control method and system based on continuous mass flow method | |
| CN205993508U (en) | A kind of vacuum foodstuff drying device | |
| CN105248627A (en) | Energy-saving and environmental-protection grain dryer | |
| CN105941616A (en) | Vacuum grain dryer and drying method | |
| CN105767163B (en) | A kind of vertical wet thermal control speed thin-layer drying platform and drying means | |
| JP2019148361A (en) | Circulation-type dryer, drying method therefor, and drying control program | |
| CN104273217A (en) | Series heating type counter flow grain dryer | |
| CN104544501A (en) | Macadimia nut drying device with weighing devices and macadimia nut drying method | |
| CN204259729U (en) | The reverse-flow foodstuff drying device of series connection hot type | |
| EP3139119B1 (en) | Method for the automation of the operation mode of a hybrid solar dryer for plants and respecitive hybrid solar dryer | |
| CN102252894B (en) | Fast energy-saving grain baking oven capable of controlling sample water content at drying end point | |
| CN204168979U (en) | Intelligent cereal drier with cyclic | |
| CN104013089A (en) | Hot air variable temperature tobacco shred drying device and warm-keeping drying test method thereof | |
| CN104429411A (en) | Grain drying and storing tower | |
| CN204426637U (en) | A kind of Queensland nut drying device with weighing device | |
| CN104482751B (en) | Method and device for eliminating thermal inertia of hot air drier | |
| CN110347197B (en) | Grain continuous drying window control method based on equivalent accumulated temperature | |
| CN205138169U (en) | Continuous type grain drying moisture is system of observing and controling on line based on continuous matter method that flows |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |